KR102033481B1 - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
KR102033481B1
KR102033481B1 KR1020120140377A KR20120140377A KR102033481B1 KR 102033481 B1 KR102033481 B1 KR 102033481B1 KR 1020120140377 A KR1020120140377 A KR 1020120140377A KR 20120140377 A KR20120140377 A KR 20120140377A KR 102033481 B1 KR102033481 B1 KR 102033481B1
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KR
South Korea
Prior art keywords
liquid crystal
crystal panel
adhesive tape
polarizing plate
attached
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KR1020120140377A
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Korean (ko)
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KR20140072634A (en
Inventor
신재민
염문수
Original Assignee
엘지디스플레이 주식회사
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Priority to KR1020120140377A priority Critical patent/KR102033481B1/en
Publication of KR20140072634A publication Critical patent/KR20140072634A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and to a liquid crystal display device having a light weight, a thin shape, and a narrow bezel.
According to the present invention, the liquid crystal panel and the backlight unit are integrally modularized with adhesive tape, and the second polarizing plate is attached to the upper part of the adhesive tape attached to the upper edge of the liquid crystal panel, thereby resulting in light weight, thinness, and simplification of the process. Can be.
In addition, it is possible to provide a liquid crystal display having a narrow bezel, and to implement a clear borderless without a border between a screen and a frame.

Description

Liquid crystal display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and to a liquid crystal display device having a light weight, a thin shape, and a narrow bezel.

In line with the recent information age, the display field has also been rapidly developed, and a liquid crystal display device (FPD) is a flat panel display device (FPD) having advantages of thinning, light weight, and low power consumption. LCD, plasma display panel device (PDP), electroluminescence display device (ELD), field emission display device (FED), etc. : It is rapidly replacing CRT.

Among them, liquid crystal display devices are most actively used in the field of notebooks, monitors, TVs, etc. because of their excellent contrast ratio and high contrast ratio.

Such a liquid crystal display is an essential component of a liquid crystal panel bonded through a liquid crystal layer between two side-by-side substrates, and realizes a difference in transmittance by changing an arrangement direction of liquid crystal molecules with an electric field in the liquid crystal panel. do.

However, since the liquid crystal panel does not have its own light emitting element, a separate light source is required in order to display the difference in transmittance as an image. To this end, a backlight including a light source is disposed on the back of the liquid crystal panel.

The liquid crystal panel and the backlight have a top frame covering the top edge of the liquid crystal panel and a cover bottom covering the back surface of the backlight with the edges surrounded by the square frame-shaped support main, respectively, and are integrally modularized through the support main. .

On the other hand, the liquid crystal display device has recently been widely used, such as a desktop computer monitor and a wall-mounted television, as well as a portable computer. It is actively underway.

However, despite efforts to manufacture a liquid crystal display device in a light weight and a thin shape, there are too many components constituting the liquid crystal display device, which hinders the thinness and light weight of the liquid crystal display device.

In addition, since there are so many components constituting the liquid crystal display device, the process of modularizing them is also complicated and requires a large process time.

In particular, in recent years, it has been demanded that liquid crystal display devices be lightweight and thin, and the display area is made wide and the bezel area which is a non-display area other than the display area is as small as possible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to provide a light weight and thin liquid crystal display device, and a second object of the present invention is to provide a liquid crystal display device having a narrow bezel.

It is also a third object to improve the efficiency of the process.

In order to achieve the above object, the present invention is a liquid crystal panel; A first polarizer attached to the rear of the liquid crystal panel; A backlight unit positioned on a rear surface of the first polarizing plate; An adhesive tape attached to cover the top and side edges of the liquid crystal panel and the side and back edges of the backlight unit; Provided is a liquid crystal display comprising a second polarizing plate attached to an upper portion of the adhesive tape attached to an upper edge of the liquid crystal panel.

In this case, an edge of the second polarizing plate is exposed to the outside of the liquid crystal panel, and the exposed edges of the second polarizing plate are fixed to each other through the liquid adhesive on the outside of the adhesive tape and attached to the top edge of the liquid crystal panel. The adhesive tape has a width of 1.0 ~ 1.9mm.

The backlight unit includes an LED assembly, a light guide plate, and an optical sheet, wherein the light guide plate includes sidewalls surrounding edges of the optical sheet, and the liquid crystal panel is seated on the sidewall of the light guide plate. The side wall is attached and fixed through a double-sided adhesive tape or a liquid adhesive.

Here, the optical sheet is formed integrally with the first polarizing plate, and the height of the sidewall corresponds to the thickness of the optical sheet.

In addition, the present invention and the liquid crystal panel; A first polarizer attached to the rear of the liquid crystal panel; A backlight unit positioned on a rear surface of the first polarizing plate; A cover bottom including a horizontal surface in which a rear surface of the backlight unit is in close contact with the back surface, and a side surface of which the side surface of the backlight unit is guided; An adhesive tape attached to cover the horizontal surface and the side surface of the cover bottom and an upper edge of the liquid crystal panel; Provided is a liquid crystal display comprising a second polarizing plate attached to an upper portion of the adhesive tape attached to an upper edge of the liquid crystal panel.

Here, the edge of the second polarizing plate is exposed to the outside of the liquid crystal panel, the exposed edge of the second polarizing plate is fixed to each other through the liquid adhesive and the outer side of the adhesive tape, the horizontal plane is perpendicular to the side And a first horizontal plane to be bent, a vertical plane perpendicular to the first horizontal plane, and a second horizontal plane perpendicular to the vertical plane and not facing the first horizontal plane.

The adhesive tape is attached to cover the first horizontal plane.

As described above, according to the present invention, the liquid crystal panel and the backlight unit are integrally modularized through the adhesive tape, and the second polarizing plate is attached to the upper portion of the adhesive tape attached to the upper edge of the liquid crystal panel, thereby providing a lightweight and It has the effect of being thin and simplifying the process.

In addition, there is an effect to provide a liquid crystal display device having a narrow bezel (narrow bezel), it is possible to implement a clear borderless (clear borderless) without a border between the screen and the frame.

1 is a cross-sectional view schematically showing a liquid crystal display module according to a first embodiment of the present invention.
2 is a cross-sectional view schematically showing a liquid crystal display module according to a second embodiment of the present invention.
3 is a schematic cross-sectional view of a liquid crystal display according to a third exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a schematic cross-sectional view of a liquid crystal display module according to a first embodiment of the present invention.

As illustrated, the liquid crystal display module includes a liquid crystal panel 110, a backlight unit 120, and an adhesive tape 210.

Looking at each of these in detail, first, the liquid crystal panel 110 plays a key role in image expression, and includes the first and second substrates 112 and 114 bonded to each other with the liquid crystal layer interposed therebetween. .

At this time, although not clearly shown in the drawings under the premise of an active matrix method, a plurality of gate lines and data lines intersect on the inner surface of the first substrate 112, which is commonly referred to as a lower substrate or an array substrate, thereby defining pixels. In addition, a thin film transistor (TFT) is provided at each crossing point and is connected one-to-one with a transparent pixel electrode formed in each pixel.

An inner surface of the second substrate 114, called an upper substrate or a color filter substrate, may correspond to each pixel, for example, a color filter of red (R), green (G), and blue (B) color, and these. A black matrix is provided around each other to cover non-display elements such as gate lines, data lines, and thin film transistors. In addition, a transparent common electrode covering them is provided.

In addition, although not clearly shown in the drawings, the first substrate 112 is provided with a pad area in addition to the second substrate 114 so that the area of one edge is larger. Accordingly, a driving circuit for applying signals to a plurality of gate lines and data lines is configured in the pad region, which is one edge of the first substrate 112.

Through the pad region of the first substrate 112, the gate and the data printed circuit board are connected to each other through a connection member such as a flexible circuit board, and are flipped and adhered to the rear surface of the LCD module during the modularization process.

In addition, an alignment layer for determining the initial molecular alignment direction of the liquid crystal is interposed between two substrates 112 and 114 of the liquid crystal panel 110 and the liquid crystal layer, and both substrates are prevented to prevent leakage of the liquid crystal layer filled therebetween. A seal pattern is formed along the edges of 112 and 114.

The first and second polarizing plates 119a and 119b are attached to the outer surfaces of the first and second substrates 112 and 114, respectively, and the second polarizing plates 119b are attached to the outer surfaces of the second substrate 114. Is formed to have a larger size than the second substrate 114.

Therefore, the edge of the second polarizing plate 119b is protruded to the outside of the second substrate 114 except for one edge to which the printed circuit board is connected.

The backlight unit 120 for supplying light is provided on a rear surface of the liquid crystal panel 110 such that a difference in transmittance of the liquid crystal panel 110 is expressed to the outside.

The backlight unit 120 includes a light guide plate 123 for guiding light generated from the LED assembly 129 and the LED assembly 129, a reflector plate 125 formed at a lower portion of the light guide plate 123, and made of white or silver, and a light guide plate. It is composed of an optical sheet 121 located on the upper portion to process the light to a high quality.

The above-described LED assembly 129 is a light source, which is located on one side of the light guide plate 123 so as to face the light incident part of the light guide plate 123, and the LED assembly 129 includes a plurality of LEDs 129a and LEDs 129a thereof. ) Includes a PCB 129b which is mounted at regular intervals.

In this case, the plurality of LEDs 129a emit light having red (R), green (G), and blue (B) colors toward the light incident surface of the light guide plate 123, respectively, and the plurality of RGB LEDs (129a). ) Can be lit at once to realize white light by color mixing.

In particular, recently, in order to improve luminous efficiency and luminance, a blue LED 129a including a blue LED chip having excellent luminous efficiency and luminance is used, and as a phosphor, 'cerium doped yttrium aluminum garnet (YAG: Ce)', In other words, a blue LED 129a made of yellow phosphor is used.

The blue light emitted from the LED 129a is transmitted through the phosphor and mixed with the yellow light emitted by the phosphor, thereby realizing white light.

In this case, in addition to the LED assembly 129, a fluorescent lamp such as a cold cathode fluorescent lamp or an external electrode fluorescent lamp may be used, and when the fluorescent lamp is used, the protection of the fluorescent lamp may be used. In addition, it may further include a lamp guide (not shown) that serves to focus the light in the light guide plate 123 direction.

The light guide plate 123 to which light emitted from the plurality of LEDs 129a is incident is spread evenly to a large area of the light guide plate 123 while the light incident from the LED 129a is propagated through the light guide plate 123 by a plurality of total reflections. The surface light source is provided to the liquid crystal panel 110.

At this time, the light guide plate 123 includes a pattern of a specific shape on the back surface to supply a uniform surface light source, the pattern is an elliptical pattern, a polygon, to guide the light incident into the light guide plate 123. The pattern (polygon pattern), hologram pattern (hologram pattern) can be configured in various ways.

The reflector 125 is positioned on the rear surface of the light guide plate 123, and reflects light passing through the rear surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of the light.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light collecting sheet, and diffuses or collects light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110. Make it incident.

Here, the diffusion sheet is positioned directly on the light guide plate 123, and serves to adjust the direction of light so that the light propagates toward the light collecting sheet while dispersing light incident through the light guide plate 123.

The light diffused through the diffusion sheet is collected by the light collecting sheet toward the liquid crystal panel 110. As a result, the light passing through the light collecting sheet is almost perpendicular to the liquid crystal panel 110.

Alternatively, the liquid crystal display module of the present invention may be formed of a composite optical sheet in which the optical sheet 121 simultaneously has a diffusion and condensing function, and may be formed in a form in which the diffusion sheet and the condensing sheet are integrally laminated.

At this time, the composite optical sheet is based on the planar base substrate of the transparent material, the diffusion layer disposed below the base substrate for diffusing the light incident through the light guide plate, and the light diffused by the diffusion layer to the liquid crystal panel 110 To this end, it may be made of a light collecting layer disposed on the base substrate.

The optical sheet 121 may be integrally laminated with the first polarizing plate 119a attached to the outer surface of the first substrate 112.

Meanwhile, the backlight unit 120 having the above-described structure is called a side light method, and a plurality of LEDs 129a may be arranged in multiple layers on the PCB 129b, and the light guide plate 123 may face each other. It is also possible to arrange them side by side along the inner longitudinal direction of both edges.

In addition, a direct type in which a plurality of LED assemblies 129 are arranged side by side under the liquid crystal panel 110 without the light guide plate 123 may be omitted.

The liquid crystal panel 110 and the backlight unit 120 are integrally modularized through the adhesive tape 210. The adhesive tape 210 may include a rear edge of the reflective plate 125 of the backlight unit 120 and a backlight unit ( It is attached to cover the side of the 120 and the side of the liquid crystal panel 110 and the top edge of the liquid crystal panel 110.

Through this, the liquid crystal panel 110 and the backlight unit 120 have a primary fixing force.

In this case, the second polarizing plate 119b attached to the outer surface of the second substrate 114 of the liquid crystal panel 110 is attached to the upper portion of the adhesive tape 210 covering the upper edge of the liquid crystal panel 110. The adhesive tape 210 surrounding the edge of the second polarizing plate 119b and the side surface of the liquid crystal panel 110 exposed to the outside of the substrate 114 is fixed through a liquid adhesive 220 such as glue.

That is, the liquid crystal display module of the present invention is not provided with a separate module mechanism for modularizing the liquid crystal panel 110 and the backlight unit 120, integrally through the adhesive tape 210 and the liquid adhesive 220. Modular.

In this case, the adhesive tape 210 covering the top edge of the liquid crystal panel 110 is attached to cover the top edge of the liquid crystal panel 110 so as not to exceed a width d of 1.9 mm, thereby preventing the liquid crystal panel 110. It is preferable that the adhesive tape 210 covering the upper edge does not intrude into the active region of the liquid crystal panel 110.

Particularly, in the liquid crystal display module of the present invention, even when the adhesive tape 210 is attached to cover the upper edge of the liquid crystal panel 110 only with a width d of 1.0 mm, the second polarizing plate 119b is the adhesive tape. By attaching to the upper portion of the 210, the adhesive force of the adhesive tape 210 covering the upper edge of the liquid crystal panel 110 through the adhesive force of the second polarizing plate 119b is improved, thereby stably the liquid crystal panel 110. And the backlight unit 120 may be modularized.

That is, the adhesive tape 210 attached to the upper edge of the liquid crystal panel 110 may be attached to have a width d of 1.0 to 1.9 mm.

In addition, the adhesive tape 210 surrounding the edge of the second polarizing plate 119b and the side surface of the liquid crystal panel 110 is fixed to the liquid crystal panel 110 and the backlight unit 120 by being fixed once again through the liquid adhesive 220. ) Can be modularized more stably.

That is, the liquid crystal display module of the present invention uses the first fixing force through the adhesive tape 210, the second fixing force through the second polarizing plate 119b, and the third fixing force through the liquid adhesive 220. The module 110 and the backlight unit 120 are modularized.

Therefore, the liquid crystal display module of the present invention can omit the top cover, the guide panel and the cover bottom for modularizing the existing liquid crystal display device module, so that the liquid crystal display device can be thin and light, and the process is simplified. Come. In addition, the process cost can be reduced.

In addition, in addition to the light weight and thinness, a liquid crystal display module having a narrow bezel, in which a bezel area, which is a non-display area other than the display area, is reduced while the display area is extended by omitting the top cover, is provided. can do.

Particularly, in the liquid crystal display module of the present invention, the adhesive tape 210 is attached to the liquid crystal panel 110 by attaching the second polarizing plate 119b to the upper portion of the adhesive tape 210 covering the upper edge of the liquid crystal panel 110. Even though the top edge of the bottom surface is bonded with a very thin width, the liquid crystal panel 110 and the backlight unit 120 can be stably modularized, and a clear borderless can be realized without a border between the screen and the frame.

Table (1) below is an experimental result of measuring the assembly process, appearance state and bonding force of the liquid crystal display module according to the first embodiment of the present invention.

Sample 1 Sample 2 Sample 3 Assembly process OK OK OK Exterior OK OK OK cohesion Good Good Good

Here, the assembly process is a result showing that the liquid crystal display module according to the embodiment of the present invention can be modularized without any difficulty, and the appearance shows that a clear borderless can be realized.

In addition, it is a result of the coupling force caused by the impact or shaking of the outside of the modular LCD module.

Referring to Table (1), it can be confirmed that all samples 1, 2, and 3 have been judged to have passed the assembly process, appearance, and bonding force.

That is, after first fixing the liquid crystal panel 110 and the backlight unit 120 through the adhesive tape 210 according to the first embodiment of the present invention, the adhesive tape covering the top edge of the liquid crystal panel 110 ( The second polarizing plate 119b is attached and fixed to the upper portion 210, and the second polarizing plate 119b exposed to the outside of the second substrate 114 is adhered through the adhesive tape 210 and the liquid adhesive 220. The third fixed LCD module did not find any difficulty in a separate assembly process, and can realize a clear borderless, and the modular coupling force is also good.

2 is a schematic cross-sectional view of a liquid crystal display module according to a second embodiment of the present invention.

Meanwhile, in order to avoid duplicate descriptions, the same reference numerals are given to the same parts that play the same role as the above-described first embodiment, and only the characteristic contents to be described in the second embodiment will be described.

As illustrated, the liquid crystal display module includes an LED assembly 129 including a reflector plate 125, a light guide plate 123, a PCB 129b and an LED 129a provided on one side of the light guide plate 123. The optical sheets 121 are stacked on the light guide plate 123 to form a backlight unit 120, and a liquid crystal layer (not shown) is interposed therebetween on the first and second substrates 112 and 114. The liquid crystal panel 110 is positioned, and first and second polarizing plates 119a and 119b for selectively transmitting only specific light are attached to outer surfaces of the first second substrates 112 and 114.

At this time, the characteristic configuration of the second embodiment of the present invention is that the light guide plate 123 is formed to have a predetermined space on which the optical sheet 121 can be seated.

That is, the light guide plate 123 according to the second embodiment of the present invention includes sidewalls 123a that can surround the edge of the optical sheet 121 seated on the light guide plate 123.

The liquid crystal panel 110 is fixed to the upper sidewall 123a of the light guide plate 123 so that the edge is supported. The liquid crystal panel 110 is a liquid adhesive or a double-sided adhesive tape with the side wall 123a of the light guide plate 123. It is fixed to the side wall 123a of the light guide plate 123 through 230.

Through this, the liquid crystal panel 110 and the backlight unit 120 have a primary fixing force.

In this case, the height h of the side wall 123a of the light guide plate 123 may be formed to be higher than or corresponding to the thickness of the optical sheet 121, and the height h of the side wall 123a of the light guide plate 123 may be formed. It is preferable to form to correspond to the thickness of the optical sheet 121.

That is, the sidewalls 123a and the optical sheet 121 of the light guide plate 123 are formed to form the same plane, so that the first polarizing plate 119a and the optical sheet 121 attached to the rear of the liquid crystal panel 110 are integrally formed. In this case, it is preferable that the gap is not formed between the optical sheet 121 and the light guide plate 123.

When a gap occurs between the optical sheet 121 and the light guide plate 123, the gap between the light guide plate 123 and the optical sheet 121 in a process in which light incident from the light guide plate 123 is emitted to the optical sheet 121. This is because the total reflection in the area due to the extinction may cause a problem that the light efficiency may be lowered.

The liquid crystal panel 110 and the backlight unit 120 are integrally modularized through the adhesive tape 210. The adhesive tape 210 may include a back edge of the reflector plate 125 of the backlight unit 120 and a backlight unit ( It is attached to cover the side of the 120 and the side of the liquid crystal panel 110 and the top edge of the liquid crystal panel 110.

The second polarizing plate 119b attached to the outer surface of the second substrate 114 of the liquid crystal panel 110 is attached to the upper portion of the adhesive tape 210 covering the upper edge of the liquid crystal panel 110. The adhesive tape 210 surrounding the edge of the second polarizing plate 119b and the side surface of the liquid crystal panel 110 exposed to the outside of the substrate 114 is fixed through a liquid adhesive 220 such as glue. .

Through this, the liquid crystal display module according to the second embodiment of the present invention is the side wall 123a of the light guide plate 123, the liquid crystal panel 110, the adhesive tape 210, the second polarizing plate 119b and the liquid adhesive ( It has a strong fixing force by the fourth order by 220).

Therefore, the liquid crystal panel 110 and the backlight unit 120 can be more stably modularized.

Meanwhile, the modular liquid crystal display module is finally modularized through a front cover and a rear cover together with a printed circuit board, wherein the front cover or the rear cover is made of a plastic material such as PC (polycarbonate). In this case, the cover assembly 150 (refer to FIG. 3) may be further provided on the rear surface of the backlight unit 120 to dissipate heat generated while driving the LED assembly 129 and the image. Let's look at it in more detail.

3 is a schematic cross-sectional view of a liquid crystal display according to a third exemplary embodiment of the present invention.

In the meantime, in order to avoid duplicate description, the same reference numerals are assigned to the same parts, which play the same role as the above-described first and second embodiments, and only the characteristic contents to be described in the third embodiment will be described. would.

As shown, the liquid crystal display device includes an LED assembly 129 including a reflector plate 125, a light guide plate 123, a PCB 129b and an LED 129a provided on one side of the light guide plate 123; Optical sheets 121 are stacked on the light guide plate 123 to form the backlight unit 120, and a liquid crystal layer (not shown) is interposed therebetween with the first and second substrates 112 and 114 thereon. The panel 110 is positioned, and first and second polarizing plates 119a and 119b for selectively transmitting only specific light are attached to outer surfaces of the first second substrates 112 and 114.

In this case, the characteristic configuration of the third embodiment of the present invention is that the liquid crystal panel 110 and the backlight unit 120 are seated on the cover bottom 150.

The cover bottom 150 is provided to discharge high temperature heat generated from the liquid crystal panel 110 and the backlight unit 120 to the outside in the process of driving an image, and the cover bottom 150 of the liquid crystal display device module. Stiffness can also be improved.

The cover bottom 150 includes a horizontal surface 151 and a side surface 153 whose edge is vertically bent, such that the liquid crystal panel 110 and the backlight unit 120 are seated on the cover bottom 150. The cover unit 150 and the backlight unit 120 are guided by surrounding the rear edge and side surfaces of the backlight unit 120 and the side surface of the liquid crystal panel 110.

In this case, although the horizontal surface 151 of the cover bottom 150 is shown to cover only a portion of the rear edge of the backlight unit 120, the cover surface 150 may be formed to completely cover the rear surface of the backlight unit 120.

In addition, the horizontal surface 151 of the cover bottom 150 is formed to be stepped inward to form a predetermined space with the rear surface of the reflecting plate 125, that is, the horizontal surface 151 of the cover bottom 150 is formed on the side surface 153. A first horizontal plane 151a, a vertical plane 151b perpendicular to the first horizontal plane 151a, and a second horizontal plane 151c perpendicular to the vertical plane 151b and not facing the first horizontal plane 151a. .

As such, the horizontal surface 151 of the cover bottom 150 is formed to be stepped, and thus a printed circuit such as a system board is formed in a predetermined space formed between the rear surface of the reflecting plate 125 and the horizontal surface 151 of the cover bottom 150. The substrate may be mounted.

Through this, the thickness of the liquid crystal display module can be prevented from being thickened by a printed circuit board such as a system board, thereby realizing a thinner liquid crystal display module.

As such, the backlight unit 120 and the liquid crystal panel 110 mounted on the cover bottom 150 are integrally modularized through the adhesive tape 210, and the adhesive tape 210 is a horizontal surface of the cover bottom 150. The rear surface and the outside of the side surface 153 of the cover bottom 150 and the top edge of the liquid crystal panel 110 are attached to each other.

In this case, the adhesive tape 210 attached to cover the rear surface of the horizontal surface 151 of the cover bottom 150 is formed to cover only the first horizontal surface 151 a of the cover bottom 150, and thus the horizontal surface of the cover bottom 150 is covered. Preferably, the adhesive tape 210 covering the 151 and the horizontal surface 151 of the cover bottom 150 are coplanar with each other.

The second polarizing plate 119b attached to the outer surface of the second substrate 114 of the liquid crystal panel 110 is attached to the upper portion of the adhesive tape 210 covering the upper edge of the liquid crystal panel 110. The adhesive tape 210 surrounding the edge of the second polarizing plate 119b and the side surface of the liquid crystal panel 110 exposed to the outside of the substrate 114 is fixed through a liquid adhesive 220 such as glue. .

Through this, the liquid crystal display module according to the third embodiment of the present invention has a strong fixing force due to the third order by the adhesive tape 210, the second polarizing plate 119b, and the liquid adhesive 220.

Therefore, the liquid crystal panel 110 and the backlight unit 120 can be more stably modularized, the rigidity can be improved through the cover bottom 150, and the liquid crystal panel 110 and the backlight unit in the process of driving an image. The high temperature heat generated from the 120 may be discharged to the outside.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

110: liquid crystal panel 112: first substrate, 114: second substrate
119a and 119b: first and second polarizing plates
120: backlight unit (121: optical sheet, 123: light guide plate, 125: reflector, 129: LED assembly (129a: LED, 129b: PCB))
210: adhesive tape, 220: liquid adhesive

Claims (12)

A liquid crystal panel;
A first polarizer attached to the rear of the liquid crystal panel;
A backlight unit positioned on a rear surface of the first polarizing plate;
An adhesive tape including a first region attached to an upper edge of the liquid crystal panel, a second region attached to a side of the liquid crystal panel and the backlight unit, and a third region covering a portion of a rear edge of the backlight unit;
A second polarizer attached to an upper portion of the liquid crystal panel
Including;
The first region is interposed between the top edge of the liquid crystal panel and the second polarizing plate to overlap each other;
An edge of the second polarizing plate is exposed to the outside of the adhesive tape, and the edge of the second polarizing plate exposed to the outside is fixed to each other and the outside of the second area of the adhesive tape through a liquid adhesive.
delete The method of claim 1,
The first region covers an edge of 1.0 to 1.9 mm of the liquid crystal panel.
The method of claim 1,
The backlight unit may include an LED assembly, a light guide plate, and an optical sheet, and the light guide plate may include sidewalls surrounding edges of the optical sheet.
The method of claim 4, wherein
And the liquid crystal panel is mounted on the sidewall of the light guide plate, and the liquid crystal panel is attached and fixed to the sidewall by a double-sided adhesive tape or a liquid adhesive.
The method of claim 4, wherein
And the optical sheet is integrated with the first polarizing plate.
The method of claim 4, wherein
The height of the side wall corresponds to the thickness of the optical sheet.
A liquid crystal panel;
A first polarizer attached to the rear of the liquid crystal panel;
A backlight unit positioned on a rear surface of the first polarizing plate;
A cover bottom including a horizontal surface in which a rear surface of the backlight unit is in close contact with the back surface, and a side surface of which the side surface of the backlight unit is guided;
An adhesive tape comprising a first region attached to an upper edge of the liquid crystal panel, a second region attached to the side of the cover bottom, and a third region covering a part of the rear surface of the horizontal surface of the cover bottom;
A second polarizer attached to an upper portion of the liquid crystal panel
Including;
The first region is interposed between the top edge of the liquid crystal panel and the second polarizing plate to overlap each other;
An edge of the second polarizing plate is exposed to the outside of the adhesive tape, and the edge of the second polarizing plate exposed to the outside is fixed to each other and the outside of the second area of the adhesive tape through a liquid adhesive.
delete The method of claim 8,
And the horizontal plane includes a first horizontal plane bent vertically from the side surface, a vertical plane perpendicular to the first horizontal plane, and a second horizontal plane perpendicular to the vertical plane and not facing the first horizontal plane.
The method of claim 10,
And the third region is attached to cover the rear surface of the first horizontal plane.
The method according to any one of claims 1 and 8,
And the liquid adhesive completely covers an edge of the second polarizing plate exposed to the outside of the adhesive tape.
KR1020120140377A 2012-12-05 2012-12-05 Liquid crystal display device KR102033481B1 (en)

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CN106970485B (en) * 2017-02-28 2020-07-10 惠州Tcl移动通信有限公司 Display device
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