WO2021112366A1

WO2021112366A1 - Viewing angle filter and display device including same

Info

Publication number: WO2021112366A1
Application number: PCT/KR2020/009706
Authority: WO
Inventors: 민관식
Original assignee: 삼성전자주식회사
Priority date: 2019-12-03
Filing date: 2020-07-23
Publication date: 2021-06-10
Also published as: KR20210069293A

Abstract

The disclosed display device according to an embodiment comprises: a display panel; a viewing angle filter capable of blocking light emitted from the display panel in a specific direction; and a control unit for adjusting a voltage applied to the viewing angle filter so that a viewing angle is adjusted on the basis of an operation mode of the viewing angle filter, wherein the viewing angle filter comprises: a first transparent substrate on which a plurality of first electrodes are disposed; a second transparent substrate which is opposite to the first transparent substrate and on which a second electrode is disposed; a plurality of transparent partition walls spaced apart from each other between the first transparent substrate and the second transparent substrate; and electrophoretic particles provided in a plurality of cavities formed between the plurality of transparent partition walls.

Description

Viewing angle filter and display device including same

The disclosed invention relates to a viewing angle filter and a display device including the same.

In general, a display device is an output device that visually displays received or stored image information to a user, and is used in various fields such as homes and businesses.

For example, the display device includes a monitor device connected to a personal computer or a server computer, a portable computer device, a navigation terminal device, a general television device, an Internet Protocol television (IPTV) device, a smart phone, Portable terminal devices such as tablet PCs, personal digital assistants (PDA), or cellular phones, various display devices used to reproduce images such as advertisements or movies in industrial fields, or other various types of audio /video system, etc.

The display panel includes pixels arranged in a matrix form and thin film transistors (TFTs) provided in each of the pixels, and the amount of light passing through the pixels changes or is emitted from the pixels according to an image signal applied to the thin film transistors. The amount of light can be changed. The display device may display an image by adjusting the amount of light emitted from each pixel of the display panel.

The display panel for displaying an image includes a self-luminous display panel that emits light by itself according to the image, and a non-luminous display panel that blocks or passes light emitted from a separate light source according to the image. A typical non-emission display panel is a liquid crystal display panel (LCD Panel). The liquid crystal display panel may include a backlight unit emitting light and a liquid crystal panel blocking or passing light emitted from the backlight unit.

As the demand for personal privacy protection increases, a privacy protection device in the form of a film that blocks light emitted to the side of the display device is being used. The privacy protection film may limit a side viewing angle so that an image displayed on the display device cannot be viewed by a user other than a user located in front of the display device. However, the privacy protection film cannot lift the viewing angle restrictions unless it is removed by itself. Also, the prior art cannot freely adjust the viewing angle.

Provided are a viewing angle filter capable of switching between a public mode providing a wide viewing angle and a private mode providing a narrow viewing angle according to a user's request, and a display device including the same.

A display apparatus according to an embodiment includes a display panel; a viewing angle filter capable of blocking light emitted from the display panel in a specific direction; and a control unit that adjusts the voltage applied to the viewing angle filter to adjust the viewing angle based on the operation mode of the viewing angle filter, wherein the viewing angle filter includes: a first transparent substrate on which a plurality of first electrodes are disposed; a second transparent substrate facing the first transparent substrate and having a second electrode disposed thereon; a plurality of transparent barrier ribs spaced apart between the first transparent substrate and the second transparent substrate; and electrophoretic particles provided in a plurality of cavities formed between the plurality of transparent barrier ribs.

The controller determines an operation mode of the viewing angle filter as a public mode or a private mode, and a voltage applied between the plurality of first electrodes and the second electrode based on a viewing angle determined by the public mode or the private mode can be adjusted.

The controller may adjust a voltage applied between the plurality of first electrodes and the second electrode based on a viewing angle received from the input unit.

The controller may independently adjust the voltage applied to each of the plurality of first electrodes.

The plurality of transparent barrier ribs may be spaced apart from each other in a first direction parallel to the first transparent substrate and the second transparent substrate, and the controller may independently adjust one or more of a left viewing angle or a right viewing angle of the viewing angle filter.

The plurality of transparent barrier ribs are spaced apart from each other in a second direction parallel to the first transparent substrate and the second transparent substrate, and the controller may independently adjust at least one of an upper viewing angle and a lower viewing angle of the viewing angle filter.

The controller may divide the viewing angle filter into a plurality of regions, determine an operation mode for each of the plurality of regions of the viewing angle filter, and individually control the plurality of regions of the viewing angle filter based on the determined operation mode.

The controller may divide the plurality of first electrodes into a plurality of groups corresponding to a plurality of regions of the viewing angle filter, and may independently adjust voltages applied to the plurality of groups.

Each of the plurality of first electrodes may be disposed to correspond to each of the plurality of cavities, and may have a width equal to or smaller than an interval between the plurality of transparent barrier ribs.

The electrophoretic particles may be colored electrophoretic particles.

The second electrode may be a common electrode shared by the plurality of first electrodes.

A viewing angle filter according to an embodiment includes: a first transparent substrate on which a plurality of first electrodes are disposed; a second transparent substrate facing the first transparent substrate and having a second electrode disposed thereon; a plurality of transparent barrier ribs spaced apart between the first transparent substrate and the second transparent substrate; and electrophoretic particles provided in a plurality of cavities formed between the plurality of transparent barrier ribs.

The electrophoretic particles may be colored electrophoretic particles.

The electrophoretic particles provided in each of the plurality of cavities may move independently based on a voltage applied between each of the plurality of first electrodes and the second electrode.

The electrophoretic particles may be collected at the plurality of first electrodes or dispersed between the plurality of first electrodes and the second electrode based on a voltage applied between each of the plurality of first electrodes and the second electrode. have.

The viewing angle filter according to an embodiment may further include a transparent fluid provided in the plurality of cavities.

The plurality of transparent barrier ribs may be spaced apart from each other in a first direction parallel to the first transparent substrate and the second transparent substrate, or a second transparent barrier rib perpendicular to the first direction and parallel to the first transparent substrate and the second transparent substrate It may be spaced apart in two directions.

The disclosed viewing angle filter and the display device including the same may switch between a public mode providing a wide viewing angle and a private mode providing a narrow viewing angle according to a user's request.

In addition, the viewing angle filter and the display device including the same may adjust the viewing angle to various angles and provide different viewing angles for each of a plurality of screen areas.

In addition, since the disclosed viewing angle filter can be applied regardless of the type of display device, it can be usefully utilized in various display devices.

1 illustrates an appearance of a display device according to an exemplary embodiment.

2 illustrates an internal structure of a display device according to an exemplary embodiment.

3 and 4 illustrate an internal structure of a display device according to another exemplary embodiment.

5 is a cross-sectional view of a viewing angle filter according to an exemplary embodiment.

6 is a plan view of a viewing angle filter according to an exemplary embodiment.

7 illustrates an example in which a viewing angle is adjusted by a viewing angle filter according to an exemplary embodiment.

8 is a control block diagram of a display apparatus according to an exemplary embodiment.

9 and 10 show an operation example of a viewing angle filter according to an exemplary embodiment.

11 is a flowchart illustrating a method of manufacturing a viewing angle filter according to an exemplary embodiment.

12 is a flowchart illustrating a method of controlling a display apparatus according to an exemplary embodiment.

13 is a flowchart further explaining a method of controlling a display apparatus according to an exemplary embodiment.

Like reference numerals refer to like elements throughout. This specification does not describe all elements of the embodiments, and general content in the technical field to which the present invention pertains or content that overlaps among the embodiments is omitted. The term 'part, module, member, block' used in the specification may be implemented in software or hardware, and according to embodiments, a plurality of 'part, module, member, block' may be implemented as one component, It is also possible for one 'part, module, member, block' to include a plurality of components.

Throughout the specification, when a part is "connected" with another part, it includes not only a direct connection, but also an indirect connection, and the indirect connection includes connection through a wireless communication network. do. In addition, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member exists between the two members.

Terms such as 1st, 2nd, etc. are used to distinguish one component from another component, and the component is not limited by the above-mentioned terms. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In each step, the identification code is used for convenience of description, and the identification code does not describe the order of each step, and each step may be performed differently from the specified order unless the specific order is clearly stated in the context. have.

Hereinafter, the working principle and embodiments of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1 , a display apparatus 100 is a device capable of processing an image signal received from the outside and visually displaying the processed image. Hereinafter, the display apparatus 100 is exemplified as a television (TV), but is not limited thereto. That is, the display device 100 may be implemented in various forms, such as a monitor, a portable multimedia device, a portable communication device, and a portable computing device. The form of the display device 100 is not limited as long as it is a device that visually displays an image.

The display apparatus 100 may receive a video signal and an audio signal from various content sources, and may output video and audio corresponding to the video signal and the audio signal. For example, the display apparatus 100 may receive television broadcast content through a broadcast reception antenna or a cable, receive content from a content reproduction device, or receive content from a content providing server of a content provider.

The display apparatus 100 may include a main body 101 accommodating a plurality of components for displaying an image, and a display panel 110 provided on one side of the main body 101 to display an image I. The display panel 110 may form a screen S.

The main body 101 forms the outer shape of the display apparatus 100 , and a component for allowing the display apparatus 100 to display the image I may be provided inside the main body 101 . The body 101 shown in FIG. 1 has a flat plate shape, but the shape of the body 101 is not limited to that shown in FIG. 1 . For example, the main body 101 may have a curved shape such that the left and right ends protrude forward and the center is concave.

The screen S is formed on the front surface of the main body 101, and the image I, which is visual information, may be displayed on the screen S. For example, a still image or a moving image may be displayed on the screen S, and a 2D flat image or a 3D stereoscopic image may be displayed. A plurality of pixels P are formed on the screen S, and the image I displayed on the screen S may be formed by a combination of light emitted from the plurality of pixels P. For example, one image I may be formed on the screen S by combining light emitted from a plurality of pixels P like a mosaic.

Each of the plurality of pixels P may emit light of various brightnesses and various colors. In order to emit light of various brightnesses, each of the plurality of pixels P includes a configuration capable of emitting light directly (eg, an organic light emitting diode or micro LED) or passing light emitted by the backlight unit or It may include a blockable component (eg, a liquid crystal panel).

In order to emit light of various colors, each of the plurality of pixels P may include sub-pixels P _R , P _G , and P _B . The sub-pixels P _R , P _G , and P _B are a red sub-pixel P _R capable of emitting red light, a green sub-pixel P _G capable of emitting green light, and a blue light emitting device. It may include a blue sub-pixel P _B that can do this. By the combination of the red light of the red sub-pixel P _R , the green light of the green sub-pixel P _G , and the blue light of the blue sub-pixel P _B , each of the plurality of pixels P has various brightnesses and different colors. light can be emitted.

The display apparatus 100 may include various types of display panels capable of displaying the image I. For example, the display device 100 is a liquid crystal display panel (LCD Panel), a light emitting diode panel (Light Emitting Diode Panel, LED Panel), or an organic light emitting diode panel (Organic Light Emitting Diode Panel, OLED Panel). ), or a micro LED panel.

Referring to FIG. 2 , various components for generating an image I on a screen S may be provided inside the main body 101 of the display apparatus 100 . For example, the display device 100 includes the display panel 110 , the viewing angle filter 120 capable of blocking light emitted in a specific direction from the display panel 110 , and a control assembly ( 140 ), a power assembly 150 for supplying power to the display panel 110 and the viewing angle filter 120 , and a cover glass 106 for protecting and supporting the display panel 110 and the viewing angle filter 120 . can do. The display panel 110 and the viewing angle filter 120 are electrically connected to the assembly 140 and/or the power assembly 150, respectively.

The display panel 110 illustrated in FIG. 2 may be a light emitting diode panel or a micro LED panel. The front surface of the display panel 110 forms a screen S of the display apparatus 100 and may include a plurality of pixels P.

The display panel 110 may include a substrate and a plurality of light emitting diodes 50 ; 51 , 52 , 53 . Electrodes electrically connected to the plurality of light emitting diodes 50 may be formed on the substrate of the display panel 110 . The substrate of the display panel 110 may include a thin film transistor (TFT). The substrate of the display panel 110 may include a printed circuit board (PCB), a metal core PCB (MCPCB, metal core PCB), and/or a flexible PCB (FPCB, flexible PCB).

The plurality of light emitting diodes 50; 51, 52, 53 may be a light emitting structure including an n-type semiconductor, an active layer, a p-type semiconductor, a first contact electrode, and a second contact electrode, and include a first contact electrode and a second contact electrode. It may be in the form of a flip chip in which the electrodes are disposed in the same direction. In addition, the first contact electrode and the second contact electrode of the light emitting diode 50 may be respectively soldered to electrodes formed on the substrate. In addition, the light emitting diode 50 may be bonded to the substrate through a bonding material formed of a resin such as epoxy, silicone, or urethane, an anisotropic conductive film (ACF), or the like.

The plurality of light emitting diodes 50 may include a red light emitting diode 51 , a green light emitting diode 52 , and a blue light emitting diode 53 . The red light emitting diode 51 , the green light emitting diode 52 , and the blue light emitting diode 53 may be mounted on the substrate as one unit. In other words, the red light emitting diode 51 , the green light emitting diode 52 , and the blue light emitting diode 53 may form one pixel. The red light emitting diode 51 , the green light emitting diode 52 , and the blue light emitting diode 53 may each form a sub pixel. Light emitted from the plurality of pixels P may form an image I displayed on the screen S.

In FIG. 2 , the viewing angle filter 120 may be disposed in front of the display panel 110 . The viewing angle filter 120 may transmit or block light emitted from the front surface of the display panel 110 . The viewing angle filter 120 may block light emitted from the display panel 110 in a specific direction. For example, the viewing angle filter 120 may block light emitted in a right direction and a left direction of the display panel 110 . The viewing angle filter 120 may block light emitted in an upper direction and a left direction of the display panel 110 . In other words, the viewing angle filter 120 may adjust the viewing angle of the display apparatus 100 . The viewing angle filter 120 may be provided as a film, but is not limited thereto.

The control assembly 140 may include a control circuit for controlling the operation of the display apparatus 100 . Specifically, the control assembly 140 generates image data and sound data and stores and/or stores programs and data necessary for the operation of the processor and the display apparatus 100 and a processor that controls the respective components of the display apparatus 100 . may include.

The control assembly 140 and the power assembly 150 may be implemented as a printed circuit board and various circuits mounted on the printed circuit board. For example, the control assembly 140 may include a control circuit in which a memory and processors are mounted. The power assembly 150 may include a power circuit in which capacitors, coils, and resistance elements are mounted. Meanwhile, the controller 180 described in FIG. 8 may be implemented as a control assembly 140 .

3 and 4 , the main body 101 of the display apparatus 100 blocks or passes the backlight unit 200 emitting surface light forward, and light emitted from the backlight unit 200 . The liquid crystal panel 210 , the backlight unit 200 , and the control assembly 140 for controlling the operation of the liquid crystal panel 210 , and the power assembly 150 for supplying power to the backlight unit 200 and the liquid crystal panel 210 . may include.

In the display apparatus 100 illustrated in FIGS. 3 and 4 , the control assembly 140 may include a control circuit for controlling the operation of the liquid crystal panel 210 and the backlight unit 200 . The power assembly 150 supplies power to the liquid crystal panel 110 and the backlight unit 200 so that the backlight unit 200 outputs surface light and the liquid crystal panel 110 blocks or passes the light of the backlight unit 200 . can The backlight unit may be classified into an edge-type backlight unit and a direct-type backlight unit according to the location of the light source.

In addition, the body 101 may include a frame middle mold 103 , a bottom chassis 104 , a rear cover 105 , and a bezel 106 . The frame middle mold 103 , the bottom chassis 104 , the rear cover 105 , and the bezel 106 support and fix the liquid crystal panel 210 , the backlight unit 200 , the controller 140 , and the power assembly 150 . can do.

Also, the main body 101 may include a viewing angle filter 120 capable of blocking light emitted from the backlight unit 200 and/or the liquid crystal panel 210 in a specific direction. The backlight unit 200 , the liquid crystal panel 210 , and the viewing angle filter 120 may be electrically connected to the control assembly 140 and/or the power assembly 150 , respectively. The backlight unit 200 and the liquid crystal panel 210 may be defined as the display panel 110 .

Referring to FIG. 3 , the viewing angle filter 120 may be disposed in front of the display panel 110 . In other words, the viewing angle filter 120 may be disposed between the liquid crystal panel 210 and the bezel 102 . Meanwhile, referring to FIG. 4 , the viewing angle filter 120 may be disposed between the liquid crystal panel 210 and the backlight unit 200 .

The viewing angle filter 120 may block light emitted from the liquid crystal panel 210 and/or the backlight unit 200 in a specific direction. For example, the viewing angle filter 120 may block light emitted in right and left directions of the liquid crystal panel 210 and/or the backlight unit 200 . Also, the viewing angle filter 120 may block light emitted in the upper direction and the left direction of the liquid crystal panel 210 and/or the backlight unit 200 . In other words, the viewing angle filter 120 may adjust the viewing angle of the display apparatus 100 . The viewing angle filter 120 may be provided in the form of a film, but is not limited thereto.

Meanwhile, the front surface of the liquid crystal panel 210 forms the screen S of the display apparatus 100 and may include a plurality of pixels P. The plurality of pixels P included in the liquid crystal panel 210 may each independently block or pass light from the backlight unit 200 . The light passed by the plurality of pixels P may form an image I displayed on the screen S.

On one side of the liquid crystal panel 210, a cable 210a for transmitting image data to the liquid crystal panel 210, and a display driver integrated circuit 220 for processing digital image data and outputting an analog image signal (hereinafter referred to as 'driver IC') is provided. The cable 210a may electrically connect the control assembly 140 and/or the power assembly 150 and the driver IC 220 , and electrically connect the driver IC 220 and the liquid crystal panel 210 . The cable 210a may include a flexible flat cable or a film cable that can be bent.

The driver IC 220 receives image data from the control assembly 140 through the cable 210a, receives power from the power assembly 150, and transmits image data and data to the liquid crystal panel 210 through the cable 210a. drive current can be transmitted. In addition, the cable 210b and the driver IC 220 may be integrally implemented, and may be implemented as a film cable, a chip on film (COF), a tape carrier package (Tape Carrier Packet, TCP), or the like. . In other words, the driver IC 220 may be disposed on the cable 210b. However, the present invention is not limited thereto, and the driver IC 220 may be disposed on the liquid crystal panel 210 .

On the other hand, conventional techniques for adjusting the viewing angle include a technique for controlling a viewing angle by using a condensing light guide plate and a general light guide plate together, and a technique for using a main liquid crystal panel and a liquid crystal panel for adjusting the viewing angle together. This prior art can be applied only to liquid crystal display (LCD) devices. Since recently appeared OLED devices or Micro LED devices do not require a light guide plate or a liquid crystal panel, the prior art using multiple light guide plates or liquid crystal panels cannot be applied. However, the viewing angle filter 120 according to an exemplary embodiment is applicable regardless of the type of the display apparatus 100 .

Also, conventional viewing angle filters could only provide a viewing angle determined at the time of manufacture. However, the viewing angle filter 120 according to an embodiment may adjust the viewing angle of the display apparatus 100 to various angles.

5 is a cross-sectional view of a viewing angle filter according to an exemplary embodiment. 6 is a plan view of a viewing angle filter according to an exemplary embodiment.

Referring to FIG. 5 , the viewing angle filter 120 faces the first transparent substrate 121 and the first transparent substrate 121 on which the plurality of first electrodes 122: 122a, 122b, 122c, 122d are disposed. The second transparent substrate 126 on which the second electrode 124 is disposed, the plurality of transparent partition walls 123 and the plurality of transparent partition walls 123 spaced apart between the first transparent substrate 121 and the second transparent substrate 126 . ) may include the electrophoretic particles 125 provided in the plurality of cavities (C1, C2, C3, C4) formed between.

The first transparent substrate 121 and the second transparent substrate 126 may be formed of a transparent resin. The first transparent substrate 121 may be referred to as a lower substrate, and the second transparent substrate 126 may be referred to as an upper substrate. The first transparent substrate 121 and the second transparent substrate 126 are disposed to face each other. The first transparent substrate 121 and the second transparent substrate 126 may be formed of a resin-based material and may have flexibility.

The plurality of first electrodes 122 (122a, 122b, 122c, and 122d) are formed on one surface (eg, the front surface) of the first transparent substrate 121 and are spaced apart from each other. Also, the plurality of first electrodes 122 may be electrically connected to the control assembly 140 and/or the power assembly 150 . The plurality of first electrodes 122 may be independently controlled by being connected to a switching device such as a transistor. Although four first electrodes 122 are illustrated in FIG. 5 , the present invention is not limited thereto. The first electrode 122 may be referred to as a lower electrode. Accordingly, the plurality of first electrodes 122 may be referred to as a first lower electrode 122a, a second lower electrode 122b, a third lower electrode 122c, and a fourth lower electrode 122d, respectively.

The second electrode 124 may be a common electrode formed on one surface (eg, a lower surface) of the second transparent substrate 126 and shared by the plurality of first electrodes 122 . The second electrode 124 may be electrically connected to the control assembly 140 and/or the power assembly 150 . The second electrode 124 may be provided as one electrode and be disposed to cover all of the plurality of transparent partition walls 123 and the plurality of cavities C1 , C2 , C3 , and C4 . The second electrode 124 may be referred to as an upper electrode.

The first electrode 122 and the second electrode 124 are transparent electrodes. The first electrode 122 and the second electrode 124 include indium-tin-oxide (ITO), aluminum doped zinc oxide (AZO), fluorinated tin oxide (FTO), and indium oxide. It may be formed of a transparent conductive material such as (indium oxide, IO) or tin oxide (SnO2). The materials of the first electrode 122 and the second electrode 124 are not limited to those illustrated, and other transparent materials may be used. In addition, the first electrode 122 and the second electrode 124 may be prepared through a process such as photolithography and/or imprinting.

Referring to FIG. 6 , the plurality of transparent barrier ribs 123 may be spaced apart from each other in a first direction parallel to the first transparent substrate 121 and the second transparent substrate 126 (eg, a left-right direction). Alternatively, the plurality of transparent barrier ribs 123 are parallel to the first transparent substrate 121 and the second transparent substrate 126 and may be disposed to be spaced apart from each other in a second direction (eg, up and down direction) perpendicular to the first direction. may be Each of the plurality of transparent partition walls 123 may be provided to have a predetermined width W and a predetermined height H, and may be spaced apart from each other at a predetermined interval D. The height H of the transparent barrier rib 123 may be the same as the distance between the first transparent substrate 121 and the second transparent substrate 126 .

The plurality of transparent partition walls 123 may be formed of a transparent resin. For example, the plurality of transparent partition walls 123 may include acryl-nitrile butadiene styrene (ABS), poly methyl methacrylate (PMMA), poly carbonate (PC), polystyrene, polyurethane, polyvinyl chloride, epoxy-based resin, silicone-based resin, It may be formed using various polymer materials such as a melamine-based resin, an acrylic resin, or a phenol-based resin. In addition, the plurality of transparent partition walls 123 may be provided through processes such as silk screen, embossing, photolithography, and/or imprinting. The material of the transparent barrier rib 123 is not limited to the illustrated one, and other transparent materials may be used.

The first transparent substrate 121 , the second transparent substrate 126 , the first electrode 122 , the second electrode 124 , and the plurality of transparent partition walls 123 are formed of a transparent material, so that the viewing angle filter 120 is Light emitted from the display panel 110 may be easily transmitted.

Meanwhile, the plurality of transparent partition walls 123 may form a plurality of cavities C: C1, C2, C3, and C4. In other words, the plurality of cavities C: C1 , C2 , C3 , and C4 are formed between the plurality of transparent partition walls 123 . A space between the first transparent substrate 121 and the second transparent substrate 126 is divided by a plurality of transparent partition walls 123 , and the divided spaces are divided into a plurality of cavities (C: C1, C2, C3, C4). can be defined. The plurality of cavities C: C1 , C2 , C3 , and C4 are disposed along a direction in which the plurality of transparent partition walls 123 are disposed.

Each of the plurality of first electrodes 122: 122a, 122b, 122c, and 122d may be disposed to correspond to each of the plurality of cavities C: C1, C2, C3, and C4. Each of the plurality of first electrodes 122 may have a width equal to or smaller than the distance D between the plurality of transparent partition walls 123 . A distance D between the plurality of transparent partition walls 123 may be defined as a width of each of the plurality of cavities C1 , C2 , C3 , and C4 .

Alternatively, the width of the first electrode 122 may be greater than the gap D between the transparent barrier ribs 123 . In this case, the width of the first electrode 122 may be smaller than the width W of the transparent barrier rib 123 . When the width of the first electrode 122 is greater than the distance D between the transparent barrier ribs 123 , the transparent barrier rib 123 may be provided to have a step difference. In other words, a portion of the transparent barrier rib 123 in contact with the first electrode 122 may be provided in a stepped shape.

The electrophoretic particles 125 may be provided in the plurality of cavities C1, C2, C3, and C4. The electrophoretic particles 125 may be colored electrophoretic particles. For example, the electrophoretic particles 125 may be provided in a black color or may have other colors. As the electrophoretic particles 125 are provided in a color, light may be blocked. The electrophoretic particles 125 are collected from the plurality of first electrodes 122 based on the voltage applied between the plurality of first electrodes 122 and the second electrodes 124 or are collected from the plurality of first electrodes 122 and It may be dispersed between the second electrodes 124 .

In addition, the electrophoretic particles 125 provided in each of the plurality of cavities C1, C2, C3, and C4 are independent based on the voltage applied between each of the plurality of first electrodes 122 and the second electrode 124 . can move to For example, the electrophoretic particles 125 provided in the first cavity C1 and the electrophoretic particles 125 provided in the second cavity C2 may be independently controlled. Accordingly, the viewing angle may be adjusted to various angles, and different viewing angles may be provided for each of the plurality of screen areas.

On the other hand, the electrophoretic particles 125 have a memory characteristic. After a voltage is applied between the first electrode 122 and the second electrode 124 to move the electrophoretic particles 125 , even when the voltage between the first electrode 122 and the second electrode 124 is removed, electricity The migrating particles 125 do not move. Power consumption may be reduced by the memory characteristics of the electrophoretic particles 125 .

In addition, the electrophoretic particles 125 may have various mobilities. Mobility may vary depending on the electrical polarity, charge amount, and/or mass of the electrophoretic particles 125 . The movement distance of the electrophoretic particles 125 in the cavities C1 , C2 , C3 , and C4 may vary according to the magnitude of the voltage applied between the first electrode 122 and the second electrode 124 .

A transparent fluid 127 may be further provided in the plurality of cavities C1 , C2 , C3 , and C4 . The transparent fluid 127 preferably has a low viscosity for mobility of the electrophoretic particles 125 . The transparent fluid 127 includes aromatic hydrocarbons such as benzene, toluene, xylene, phenylxylylethane, diisopropylnaphthalene, and naphthenic hydrocarbons, and/or hexane, dodecylbenzene, cyclohexane, kerosene, paraffin hydrocarbons, and the like. of aliphatic hydrocarbons, and/or halogenated hydrocarbons such as chloroform, trichloroethylene, tetrachloroethylene, trifluoroethylene, tetrafluoroethylene, dichloromethane, ethyl bromide, and/or tricredyl phosphate, trioctyl phosphate , phosphoric acid esters such as octyldiphenyl phosphate and tricyclohexyl phosphate, and/or phthalic acid esters such as dibutyl phthalate, dioctyl phthalate, dilauryl phthalate, dicyclohexyl phthalate, and/or butyl oleate, di Carboxylic acid esters such as ethylene glycol dibenzoate, dioctyl sebacate, dibutyl sebacate, dioctyl adipate, trioctyl trimellitate, acetyl triethyl citrate, octyl maleate, dibutyl maleate, and ethyl acetate may be ryu. However, the transparent fluid 127 is not limited to what is illustrated.

Due to the above-described structure of the viewing angle filter 120 , the viewing angle of the display apparatus 100 may be adjusted to various angles, and different viewing angles may be provided for each of a plurality of screen areas.

Referring to FIG. 7 , the electrophoretic particles 125 provided in the plurality of cavities C1 , C2 , C3 and C4 are applied to the voltage applied between each of the plurality of first electrodes 122 and the second electrode 124 . can move independently based on For example, the electrophoretic particles 125 provided in the first cavity C1, the electrophoretic particles 125 provided in the second cavity C2, and the electrophoretic particles 125 provided in the third cavity C3. ) and the electrophoretic particles 125 provided in the fourth cavity C4 may be independently controlled.

The controller 180 may independently adjust the voltage applied to each of the plurality of first electrodes 122 . For example, when the first electrode 122 is defined as a lower electrode, the first voltage applied between the first lower electrode 122a and the second electrode 124 is the second lower electrode 122b and the second electrode 124 . It may be different from the second voltage applied between the two electrodes 124 . Similarly, the first voltage applied between the first lower electrode 122a and the second electrode 124 may be different from the third voltage applied between the third lower electrode 122c and the second electrode 124 and , may be different from the fourth voltage applied between the fourth lower electrode 122d and the second electrode 124 .

7 shows the movement of the electrophoretic particles 125 when a voltage is applied to the first electrode 122 and the second electrode 124 in a state in which the electrophoretic particles 125 are evenly dispersed in the cavity C. It will be explained that the viewing angle is controlled by It is assumed that the plurality of first electrodes 122 are positive (+), the second electrode 124 is grounded, and the electrophoretic particles 125 have a negative (-) charge. Also, for example, 0V is applied to the first lower electrode 122a and the second lower electrode 122b, +2.5V is applied to the third lower electrode 122c, and +5V is applied to the fourth lower electrode 122d.

As shown in FIG. 7 , since no voltage is applied to the first lower electrode 122a, the electrophoretic particles 125 in the first cavity C1 are formed by the first lower electrode 122a and the second electrode 124 . Keep it evenly distributed between them. Similarly, the electrophoretic particles 125 in the second cavity C2 maintain a uniformly distributed state between the second lower electrode 122b and the second electrode 124 . The electrophoretic particles 125 may be provided in a color to block light or reduce light transmittance. Accordingly, light traveling to the side surface of the transparent barrier rib 123 provided between the first cavity C1 and the second cavity C2 may be blocked by the electrophoretic particles 125 . Due to this, the emission angle of the light emitted to the front of the viewing angle filter 120 through the transparent partition wall 123 provided between the first cavity C1 and the second cavity C2 may be limited to the first angle θ1. have. An emission angle of light emitted through the transparent barrier rib 123 may be defined as a viewing angle. That is, the viewing angle may be limited to the first angle θ1 . For example, the right viewing angle and the left viewing angle of the viewing angle filter 120 may be limited to the first angle θ1 , respectively. The first angle θ1 may be about 15 degrees.

A voltage of +2.5V is applied to the third lower electrode 122c, and the electrophoretic particles 125 have a negative polarity, so the electrophoretic particles 125 move toward the third lower electrode 122c. will do The electrophoretic particles 125 may be dispersed within an area of about 1/2 of the third cavity C3. For this reason, the emission angle of the light emitted to the right side of the transparent barrier rib 123 provided between the second cavity C2 and the third cavity C3 may be limited to the second angle θ2 . That is, the right viewing angle may be limited to the second angle θ2 . The second angle θ2 is greater than the first angle θ1 . For example, the second angle θ2 may be about 30 degrees.

When a voltage of +5V is applied to the fourth lower electrode 122d, the electrophoretic particles 125 in the fourth cavity C4 may be collected on the fourth lower electrode 122d. For this reason, the emission angle of the light emitted to the right side of the transparent barrier rib 123 provided between the third cavity C3 and the fourth cavity C4 may be limited to the third angle θ3 . That is, the right viewing angle may be limited to the third angle θ3 . The third angle θ3 is greater than the second angle θ2 . For example, the fourth angle θ4 may be about 60 degrees.

In this way, the viewing angle may be adjusted to various angles according to the distribution state of the electrophoretic particles 125 . Due to this, the viewing angle can be adjusted to various angles. In other words, the distance at which the electrophoretic particles 125 are separated from the lower surface of the second electrode 124 may be adjusted by the voltage applied to the first electrode 122 .

Also, as in the above example, when the plurality of transparent barrier ribs 123 are disposed in the left-right direction (the first direction), at least one of a left viewing angle or a right viewing angle of the display apparatus 100 may be independently adjusted. In addition, when the plurality of transparent barrier ribs 123 are disposed in the vertical direction (the second direction), at least one of an upper viewing angle and a lower viewing angle of the display apparatus 100 may be independently adjusted. In other words, the left, right, upper and lower viewing angles of the display apparatus 100 may be selectively and independently adjusted according to the direction in which the plurality of transparent partition walls 123 are arranged.

Referring to FIG. 8 , the display apparatus 100 includes a display panel 110 displaying image data, a viewing angle filter 120 capable of blocking light emitted in a specific direction from the display panel 110 , a user input and/or Alternatively, the input unit 130 for obtaining a command, the power assembly 150 for supplying power to the display panel 110 and the viewing angle filter 120, the speaker 160 for outputting sound, and the communication unit 170 for communicating with an external device , a controller 180 that processes image data and/or audio signals and controls the operation of the display apparatus 100 . As described above, the controller 180 may be implemented as the control assembly 140 . The controller 180 is electrically connected to components of the display apparatus 100 . Since the display panel 110 , the viewing angle filter 120 , and the power assembly 150 are the same as those described above, a redundant description will be omitted.

The input unit 130 may include various input buttons for obtaining a user's input. For example, the input unit 130 may include a power button for turning on or off the display device 100 , a sound control button for adjusting the volume of a sound output by the display device 100 , and a content source for selecting a content source. It may include a source selection button and/or a viewing angle button for adjusting the viewing angle. In addition, the input unit 130 may be implemented as various input means such as a push switch, a touch switch, a dial, a slide switch, and a toggle switch. The input unit 130 may output an electrical signal (voltage or current) corresponding to a user input to the control unit 190 .

The input unit 130 includes a signal receiver for receiving a remote control signal of the remote controller. The remote controller may be provided separately from the display apparatus 100 , and may transmit a wireless signal corresponding to a user input to the display apparatus 100 . The input unit 130 may receive a wireless signal from the remote controller and output an electrical signal (voltage or current) corresponding to the user input to the controller 180 .

The speaker 160 may receive the sound signal processed by the controller 180 , amplify the sound, and audibly output the amplified sound. The speaker 160 may include a thin film vibrating according to an electrical acoustic signal, and sound waves may be generated by the vibration of the thin film.

The communication unit 170 may include a wired communication module that communicates with an external device (eg, a server) by wire and/or a wireless communication module that wirelessly communicates with the external device. Also, the communication unit 170 may include a receiving terminal and a tuner for receiving content including image data and/or audio signals from content sources.

The wired communication module may access the gateway through a cable connected from the display device 100 to the gateway of the Internet service provider. For example, the wired communication module may communicate with the gateway through Ethernet. The wired communication module can send and receive data to and from the communication network through the gateway.

The wireless communication module may wirelessly communicate with an access repeater (Access Point, AP) (or a user's gateway) connected to the gateway of the Internet service provider. For example, the wireless communication module may communicate with the access repeater through Wi-Fi, Bluetooth, or Zigbee. The wireless communication module can send and receive data to and from the communication network through the access repeater and the gateway.

The controller 180 may include a processor 181 that processes signals and generates image data and sound data, and a memory 182 that stores and/or stores programs and data necessary for the operation of the display apparatus 100 . . Also, the controller 180 may control the operation of the display apparatus 100 in response to a user input received through the input unit 130 .

The processor 181 is hardware and may include a logic circuit and an arithmetic circuit. The processor 181 may control respective components of the display apparatus 100 electrically connected to each other by using programs, instructions, and/or data stored in the memory 182 for the operation of the display apparatus 100 . The processor 181 and the memory 182 may be implemented as separate chips or as a single chip. Also, the controller 180 may include a plurality of processors and a plurality of memories.

The processor 181 may process an image signal to generate image data, and process an audio signal to generate sound data. Image data and sound data may be output to the display panel 110 and the speaker 160, respectively. The processor 181 may store image data in the memory 182 in units of frames. The memory 182 may be a buffer.

The memory 182 may store a program and/or data for processing image data included in the content, and may store temporary data generated while the processor 181 processes the image data. The memory 182 includes a non-volatile memory such as a read only memory and a flash memory for storing data for a long period of time, and a static random access memory (S-RAM) and D-RAM for temporarily storing data. It may include a volatile memory such as a dynamic random access memory (RAM).

The processor 181 may control the display apparatus 100 in response to a user input received by the input unit 130 . For example, the processor 181 may change brightness, contrast, sharpness, color depth, hue, gamma, color gamut, and/or saturation of an image in response to a user input. Also, the processor 181 may determine the operation mode of the viewing angle filter 120 as a public mode or a private mode in response to a user input.

Meanwhile, the display apparatus 100 may further include various components in addition to the above-described components, and each component may be separated or omitted.

The controller 180 may adjust the voltage applied to the viewing angle filter 120 so that the viewing angle is adjusted based on the operation mode of the viewing angle filter 120 . The controller 180 may determine the operation mode of the viewing angle filter 120 as a public mode or a private mode in response to a user input. Also, the controller 180 may adjust the voltage applied between the plurality of first electrodes 122 and the second electrodes 124 of the viewing angle filter 120 based on the viewing angle determined by the public mode or the private mode. .

The memory 182 may store a predetermined viewing angle corresponding to each of the public mode and the private mode. The viewing angle previously stored in the memory 182 may be defined as the first viewing angle. For example, the viewing angle stored corresponding to the public mode may be 120 degrees. The stored viewing angle corresponding to the private mode may be within a range of 20 to 80 degrees, and the light transmittance of the viewing angle filter 120 in the private mode may be 10% or less. When the operation mode of the viewing angle filter 120 is determined, the controller 180 obtains a first viewing angle corresponding to the operation mode of the viewing angle filter 120 from the memory 182 and implements the acquired first viewing angle. The voltage applied to the filter 120 may be adjusted.

Meanwhile, the controller 180 may adjust the voltage applied between the plurality of first electrodes 122 and the second electrodes 124 of the viewing angle filter 120 based on the second viewing angle received from the input unit 130 . . That is, the user can freely set a desired viewing angle. For example, when the user inputs the viewing angle of the display apparatus 100 to 60 degrees using the input unit 130 , the controller 180 controls the viewing angle filter 120 to change the viewing angle of the display apparatus 100 to 60 degrees. can be controlled When the display apparatus 100 is set to have the maximum viewing angle in the public mode, the change of the viewing angle by a user input may be performed in the private mode. Also, the controller 180 may store the second viewing angle received from the input unit 130 in the memory 182 .

As such, the disclosed viewing angle filter and the display device including the same may switch between a public mode providing a wide viewing angle and a private mode providing a narrow viewing angle according to a user's request, and may adjust the viewing angle to various angles.

The controller 180 may independently adjust the voltage applied to each of the plurality of first electrodes 122 of the viewing angle filter 120 . As described above, the electrophoretic particles 125 provided in the plurality of cavities C1 , C2 , C3 and C4 are based on the voltage applied between each of the plurality of first electrodes 122 and the second electrode 124 . so they can move independently. For example, the electrophoretic particles 125 provided in the first cavity C1, the electrophoretic particles 125 provided in the second cavity C2, and the electrophoretic particles 125 provided in the third cavity C3. ) and the electrophoretic particles 125 provided in the fourth cavity C4 may be independently controlled. The viewing angle may be adjusted by the movement of the electrophoretic particles 125 .

The controller 180 may control the viewing angle filter 120 to independently adjust one or more of the left viewing angle and the right viewing angle of the display apparatus 100 . Also, the controller 180 may control the viewing angle filter 120 to independently adjust one or more of the upper viewing angle and the lower viewing angle of the display apparatus 100 .

9 and 10 , the controller 180 may control the viewing angle filter 120 to provide a different viewing angle for each of the plurality of screen areas S1 and S2 of the display apparatus 100 . Specifically, the controller 180 divides the viewing angle filter 120 into a plurality of regions, determines an operation mode for each of the plurality of regions of the viewing angle filter 120 , and determines the viewing angle filter 120 based on the determined operation mode. A plurality of areas can be individually controlled.

The display panel 110 may generate one screen area or may generate a plurality of screen areas S1 and S2. For example, the controller 180 may control the display panel 110 to generate a plurality of screen areas S1 and S2 in response to the execution of the multi-screen mode. Different images may be displayed in each of the plurality of screen areas S1 and S2. The same image may be displayed on the plurality of screen areas S1 and S2.

The controller 180 may divide the viewing angle filter 120 into a plurality of regions based on the plurality of screen regions S1 and S2 , and may individually control the plurality of regions of the viewing angle filter 120 . In other words, the first area and the second area of the viewing angle filter 120 corresponding to the first screen area S1 and the second screen area S2 may be set. Since the plurality of screen areas is not limited to the example, two or more screen areas may be generated, and the viewing angle filter 120 may also be divided into two or more areas.

As another example, two different viewing angle filters 120 corresponding to each of the first screen area S1 and the second screen area S2 may be provided. In this case, the two viewing angle filters 120 may be independently controlled.

The controller 180 may divide the plurality of first electrodes 122 of the viewing angle filter 120 into a plurality of groups corresponding to each of the plurality of regions of the viewing angle filter 120 . Also, the controller 180 may independently adjust voltages applied to a plurality of groups. Referring back to FIG. 5 , the first lower electrode 122a and the second lower electrode 122b among the plurality of first electrodes 122 are set as a first group, and the third lower electrode 122c and the fourth lower electrode 122c The electrodes 122d may be set as a second group. The first group may be included in the first area of the viewing angle filter 120 , and the second group may be included in the second area of the viewing angle filter 120 .

Since the controller 180 can independently adjust the voltage applied to each of the plurality of first electrodes 122 , the voltage applied to the first group and the voltage applied to the second group among the plurality of first electrodes 122 are can be different. In addition, since the viewing angle is adjusted by adjusting the voltage applied to the plurality of first electrodes 122 , the first region and the second region of the viewing angle filter 120 may provide different viewing angles, respectively.

The controller 180 may individually control the first region and the second region based on the respective operation modes of the first region and the second region of the viewing angle filter 120 . For example, as shown in FIG. 9 , when the operation mode of the second area of the viewing angle filter 120 corresponding to the second screen area S2 is the private mode, the side surface of the second screen area S2 is The located first user U1 cannot see the image displayed on the second screen area S2. This is because the viewing angle of the second screen area S2 is set to be narrow, and light emitted to the side of the second screen area S2 is blocked by the viewing angle filter 120 . In this case, the operation mode of the first region of the viewing angle filter 120 may be a public mode or a private mode.

Conversely, as shown in FIG. 10 , when the operation mode of the first area of the viewing angle filter 120 corresponding to the first screen area S1 is the private mode, the first area located on the side of the first screen area S1 is 2 The user U2 cannot see the image displayed on the first screen area S1. This is because the viewing angle of the first screen area S1 is set to be narrow, and light emitted to the side of the first screen area S1 is blocked by the viewing angle filter 120 . In this case, the operation mode of the second region of the viewing angle filter 120 may be a public mode or a private mode.

In this way, different viewing angles may be provided for each of the plurality of screen areas of the display apparatus 100 , and thus user convenience may be increased. As described above, when two users view different screen areas on one display device, the two users may not interfere with each other.

In addition, the disclosed viewing angle filter 120 may be usefully utilized in various display devices. For example, when the disclosed viewing angle filter 120 is provided in a vehicle display device, safety when driving a vehicle may be improved by making an image viewed by a passenger invisible to the driver.

Referring to FIG. 11 , first, a plurality of first electrodes 122 may be disposed on the first transparent substrate 121 ( 701 ). The plurality of first electrodes 122 are formed on one surface (eg, the front surface) of the first transparent substrate 121 and are spaced apart from each other. The plurality of first electrodes 122 may be provided as transparent electrodes, and may be provided through processes such as photolithography and/or imprinting.

Subsequently, a plurality of transparent barrier ribs 123 may be disposed to be spaced apart from each other on the first transparent substrate 121 on which the first electrode 122 is disposed ( 702 ). For example, the plurality of transparent partition walls 123 may be spaced apart from each other in a first direction parallel to the first transparent substrate 121 (eg, a left-right direction). Alternatively, the plurality of transparent barrier ribs 123 may be spaced apart from each other in a second direction parallel to the first transparent substrate 121 and perpendicular to the first direction (eg, up and down). Each of the plurality of transparent partition walls 123 may be provided to have a predetermined width W and a predetermined height H, and may be spaced apart from each other at a predetermined interval D.

Next, the electrophoretic particles 125 may be injected into the plurality of cavities C1 , C2 , C3 , and C4 formed between the plurality of transparent partition walls 123 ( 703 ). The plurality of cavities C1 , C2 , C3 , and C4 are disposed along a direction in which the plurality of transparent partition walls 123 are disposed. In addition, a transparent fluid 127 may be further injected into the plurality of cavities C1 , C2 , C3 , and C4 .

In addition, the second transparent substrate 126 including the second electrode 124 may be disposed on the plurality of transparent barrier ribs 123 and the plurality of cavities C1 , C2 , C3 , and C4 ( 704 ). The second electrode 124 may be formed on one surface (eg, a lower surface) of the second transparent substrate 126 , and may be provided as a common electrode shared by the plurality of first electrodes 122 . The second electrode 124 may be provided as a transparent electrode, and may be provided through a process such as photolithography and/or imprinting. In addition, in order to prevent the electrophoretic particles 125 and/or the transparent fluid 127 from leaking, the second transparent substrate 126 is laminated to the plurality of transparent partition walls 123 and the plurality of cavities C1, C2, C3, and C4. do.

Referring to FIG. 12 , the controller 180 of the display apparatus 100 may determine the operation mode of the viewing angle filter 120 as a public mode or a private mode ( 801 ). The controller 180 may determine the operation mode of the viewing angle filter 120 based on a user's input of selecting the public mode or the private mode through the input unit 130 .

The controller 180 may determine the viewing angle based on the public mode or the private mode ( 802 ). The memory 182 may store a predetermined first viewing angle corresponding to each of the public mode and the private mode. When the operation mode of the viewing angle filter 120 is determined, the controller 180 may obtain a first viewing angle corresponding to the operation mode of the viewing angle filter 120 from the memory 182 .

Also, the controller 180 may determine the viewing angle based on a user's input. That is, the controller 180 may acquire the second viewing angle received from the input unit 130 . That is, the user can freely set a desired viewing angle.

The controller 180 may adjust the voltage applied between the plurality of first electrodes 122 and the second electrodes 124 of the viewing angle filter 120 based on the determined viewing angle ( 803 ). The controller 180 may obtain a first viewing angle corresponding to the operation mode of the viewing angle filter 120 from the memory 182 and adjust the voltage applied to the viewing angle filter 120 to realize the acquired first viewing angle. Also, the controller 180 may adjust the voltage applied between the plurality of first electrodes 122 and the second electrodes 124 of the viewing angle filter 120 based on the second viewing angle received from the input unit 130 . .

The controller 180 may independently adjust the voltage applied to each of the plurality of first electrodes 122 of the viewing angle filter 120 .

The controller 180 may apply the adjusted voltage between the plurality of first electrodes 122 and the second electrodes 124 ( 804 ). The controller 180 may control the viewing angle filter 120 to independently adjust one or more of the left viewing angle and the right viewing angle of the display apparatus 100 . Also, the controller 180 may control the viewing angle filter 120 to independently adjust one or more of the upper viewing angle and the lower viewing angle of the display apparatus 100 .

Referring to FIG. 13 , the controller 180 of the display apparatus 100 may execute a multi-screen mode ( S901 ). The controller 180 may execute a multi-screen mode in response to a user input. The controller 180 may divide the screen area formed by the display panel 110 into a plurality of screen areas S1 and S2 .

The controller 180 may divide the viewing angle filter 120 into a plurality of regions ( S902 ). The controller 180 may divide the viewing angle filter 120 into a plurality of areas based on the plurality of screen areas S1 and S2 . In other words, the first area and the second area of the viewing angle filter 120 corresponding to the first screen area S1 and the second screen area S2 may be set. Since the plurality of screen areas is not limited to the example, two or more screen areas may be generated, and the viewing angle filter 120 may also be divided into two or more areas.

The controller 180 may determine the operation mode for each of the plurality of regions of the viewing angle filter 120 as a public mode or a private mode ( S903 ). The controller 180 may determine an operation mode for each of the plurality of regions of the viewing angle filter 120 based on a user input. For example, the operation mode of the first area of the viewing angle filter 120 may be determined as the private mode, and the operation mode of the second area of the viewing angle filter 120 may be determined as the public mode.

The controller 180 may individually control a plurality of regions of the viewing angle filter 120 based on the determined operation mode ( 904 ). The controller 180 may divide the plurality of first electrodes 122 of the viewing angle filter 120 into a plurality of groups corresponding to each of the plurality of regions of the viewing angle filter 120 . Also, the controller 180 may independently adjust voltages applied to a plurality of groups. For example, the controller 180 may set the plurality of first electrodes 122 into a first group and a second group based on the first area and the second area of the viewing angle filter 120 .

Since the controller 180 can independently adjust the voltage applied to each of the plurality of first electrodes 122 , the voltage applied to the first group and the voltage applied to the second group among the plurality of first electrodes 122 are can be different. In addition, since the viewing angle is adjusted by adjusting the voltage applied to the plurality of first electrodes 122 , the first region and the second region of the viewing angle filter 120 may provide different viewing angles, respectively. For example, when the operation mode of the first area of the viewing angle filter 120 corresponding to the first screen area S1 is the private mode, the second user U2 located on the side of the first screen area S1 may An image displayed on the first screen area S1 cannot be viewed.

As described above, the disclosed viewing angle filter and the display device including the same may switch between a public mode providing a wide viewing angle and a private mode providing a narrow viewing angle according to a user's request.

Meanwhile, the disclosed embodiments may be implemented in the form of a storage medium storing instructions executable by a computer. Instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform operations of the disclosed embodiments.

The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory storage medium' is a tangible device and only means that it does not contain a signal (eg, electromagnetic wave), and this term refers to cases in which data is semi-permanently stored in a storage medium and temporary It does not distinguish the case where it is stored as For example, the 'non-transitory storage medium' may include a buffer in which data is temporarily stored.

According to one embodiment, the method according to various embodiments disclosed in this document may be provided as included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store ^TM ) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly, online between smartphones (eg: smartphones). In the case of online distribution, at least a portion of the computer program product (eg, a downloadable app) is stored at least on a machine-readable storage medium such as a memory of a manufacturer's server, a server of an application store, or a relay server It may be temporarily stored or temporarily created.

The disclosed embodiments have been described with reference to the accompanying drawings as described above. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be practiced in other forms than the disclosed embodiments without changing the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims

display panel;

a viewing angle filter capable of blocking light emitted from the display panel in a specific direction; and

a control unit that adjusts the voltage applied to the viewing angle filter so that the viewing angle is adjusted based on the operation mode of the viewing angle filter;

The viewing angle filter is

a first transparent substrate on which a plurality of first electrodes are disposed;

a second transparent substrate facing the first transparent substrate and having a second electrode disposed thereon;

a plurality of transparent barrier ribs spaced apart between the first transparent substrate and the second transparent substrate; and

and electrophoretic particles provided in a plurality of cavities formed between the plurality of transparent barrier ribs.
According to claim 1,

the control unit

Determining an operation mode of the viewing angle filter as a public mode or a private mode, and adjusting the voltage applied between the plurality of first electrodes and the second electrode based on the viewing angle determined by the public mode or the private mode display device.
3. The method of claim 2,

the control unit

A display device that adjusts a voltage applied between the plurality of first electrodes and the second electrode based on a viewing angle received from an input unit.
According to claim 1,

the control unit

A display device for independently adjusting a voltage applied to each of the plurality of first electrodes.
According to claim 1,

The plurality of transparent partition walls

are spaced apart from each other in a first direction parallel to the first transparent substrate and the second transparent substrate,

the control unit

A display device for independently adjusting at least one of a left viewing angle and a right viewing angle of the viewing angle filter.
According to claim 1,

The plurality of transparent partition walls

are spaced apart from each other in a second direction parallel to the first transparent substrate and the second transparent substrate,

the control unit

A display device for independently adjusting at least one of an upper viewing angle and a lower viewing angle of the viewing angle filter.
According to claim 1,

the control unit

The display apparatus divides the viewing angle filter into a plurality of regions, determines an operation mode for each of the plurality of regions of the viewing angle filter, and individually controls the plurality of regions of the viewing angle filter based on the determined operation mode.
8. The method of claim 7,

the control unit

A display device for dividing the plurality of first electrodes into a plurality of groups corresponding to each of a plurality of regions of the viewing angle filter, and independently adjusting voltages applied to the plurality of groups.
According to claim 1,

Each of the plurality of first electrodes is

A display device disposed to correspond to each of the plurality of cavities and having a width equal to or smaller than an interval between the plurality of transparent partition walls.
According to claim 1,

The electrophoretic particles are colored electrophoretic particles.
According to claim 1,

the second electrode

A display device that is a common electrode shared by the plurality of first electrodes.
a first transparent substrate on which a plurality of first electrodes are disposed;

a second transparent substrate facing the first transparent substrate and having a second electrode disposed thereon;

a plurality of transparent barrier ribs spaced apart between the first transparent substrate and the second transparent substrate; and

Viewing angle filter comprising a; electrophoretic particles provided in a plurality of cavities formed between the plurality of transparent barrier ribs.
13. The method of claim 12,

Each of the plurality of first electrodes is

A viewing angle filter disposed to correspond to each of the plurality of cavities and having a width equal to or smaller than an interval between the plurality of transparent partition walls.
13. The method of claim 12,

wherein the electrophoretic particles are colored electrophoretic particles.
13. The method of claim 12,

The electrophoretic particles provided in each of the plurality of cavities are

A viewing angle filter that moves independently based on a voltage applied between each of the plurality of first electrodes and the second electrode.
16. The method of claim 15,

The electrophoretic particles are

A viewing angle filter collected at the plurality of first electrodes or dispersed between the plurality of first electrodes and the second electrode based on a voltage applied between each of the plurality of first electrodes and the second electrode.
13. The method of claim 12,

The viewing angle filter further comprising; a transparent fluid provided in the plurality of cavities.
13. The method of claim 12,

the second electrode

A viewing angle filter that is a common electrode shared by the plurality of first electrodes.
13. The method of claim 12,

The plurality of transparent partition walls

Spaced apart in a first direction parallel to the first transparent substrate and the second transparent substrate, or perpendicular to the first direction and spaced apart in a second direction parallel to the first transparent substrate and the second transparent substrate viewing angle filter.