CN109709720A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN109709720A CN109709720A CN201910136983.4A CN201910136983A CN109709720A CN 109709720 A CN109709720 A CN 109709720A CN 201910136983 A CN201910136983 A CN 201910136983A CN 109709720 A CN109709720 A CN 109709720A
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Abstract
The embodiment of the invention provides a kind of backlight module and display devices.Display device includes display panel and backlight module, display panel includes multiple pixel units of matrix arrangement, each pixel unit includes periodic arrangement respectively through different monochromatic M sub-pixels, backlight module includes the folded luminescent layer and optical modulation layer set, luminescent layer includes the multiple light sources unit of matrix arrangement, each light source unit includes the different monochromatic M luminescence unit of outgoing respectively of periodic arrangement, optical modulation layer is used to the monochromatic light that each luminescence unit is emitted being modulated into the different N number of light beam of the angle of emergence, and N number of light beam distinguishes the N number of sub-pixel of directive, the color of luminescence unit emergent light is identical through the color of light as N number of sub-pixel.The present invention does not need to carry out light mixing to monochromatic light, eliminates the non-uniform problem of light mixing, improve light utilization efficiency and colour gamut, while reducing power consumption by the way that optical modulation layer is arranged in backlight module.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of backlight module and display device.
Background technique
With the development of light emitting diode (Light Emitting Diode, LED) chip manufacturing and encapsulation technology, secondary milli
Rice light emitting diode (Mini Light Emitting Diode, Mini LED) and micro-led (Micro Light
Emitting Diode, Micro LED) it gradually occupies a tiny space in display field.With crystallite dimension less than 50 microns
Micro LED is compared, and the crystallite dimension of Mini LED is about between 100 microns to 200 microns, it is easier to realize batch production,
With higher yield rate, the illumination and backlight module that are currently widely used in display.
Using Mini LED as backlight in liquid crystal display device (Liquid Crystal Display, LCD), no
The structures such as only less light guide plate, reflector plate are conducive to being thinned for backlight module thickness, and can realize that more fine height is dynamic
State range (High Dynamic Range, HDR) divides, and has abnormity cutting characteristic, and collocation flexible base plate can form high curved surface
Backlight form, meet the market demands such as power saving, slimming, HDR, special-shaped display, therefore in mobile phone, TV, car-mounted display, pen
Remember this grade field, Mini LED is increasingly becoming mainstream backlight.
Mini LED, which is applied, makees area source in backlight module in use, single mini LED is independent illuminator,
It is equivalent to backlight to be made of multiple light sources point, multiple light sources point needs to carry out light mixing and is just able to achieve uniform face light after emitting beam
Source.Currently, existing backlight module is usually that three kinds of red, green, blue monochromatic Mini LED are arranged to periodic two-dimensional
Arrangement, three kinds of monochromatic Mini LED shine simultaneously, are emitted after being mixed to form white light.
Through present inventor the study found that existing colour mixture scheme that there are light mixings is uneven, light utilization efficiency is low, power consumption is big and
The problems such as colour gamut is bad.
Summary of the invention
The embodiment of the present invention is existing to solve the technical problem to be solved is that, provide a kind of backlight module and display device
There is the problems such as light mixing existing for colour mixture scheme is uneven, light utilization efficiency is low, power consumption is big and colour gamut is bad.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides display devices, including display panel and backlight mould
Group, the display panel include multiple pixel units of matrix arrangement, and each pixel unit includes that the difference of periodic arrangement is saturating
Different monochromatic M sub-pixels are crossed, the backlight module includes the folded luminescent layer and optical modulation layer set, and the luminescent layer includes
The multiple light sources unit of matrix arrangement, each light source unit include the different monochromatic M hair of the outgoing respectively of periodic arrangement
Light unit, the optical modulation layer are located at the luminescent layer adjacent to the top of one side surface of display panel, the optical modulation layer
Monochromatic light for each luminescence unit to be emitted is modulated into the different N number of light beam of the angle of emergence, and N number of light beam difference directive is N number of
Sub-pixel, the color of the luminescence unit emergent light is identical through the color of light as N number of sub-pixel, and M is more than or equal to 3
Positive integer, N is positive integer more than or equal to 2.
Optionally, the optical modulation layer includes grating plate, and is arranged on the grating plate and matrix arrangement
Multiple raster units, each raster unit include M grating portion of periodic arrangement, a grating in M grating portion
The position in portion is corresponding with the position of a luminescence unit in the M luminescence unit, and each grating portion is used for will be corresponding
The monochromatic light of luminescence unit outgoing is modulated into the different N number of light beam of the angle of emergence.
Optionally, the grating plate is arranged on the surface of the luminescent layer side in M grating portion, or
It is arranged on surface of the grating plate far from the luminescent layer side.
Optionally, each grating portion includes the different diffraction grating of multiple screen periods for setting gradually, each diffraction light
Grid are used to the monochromatic light that the luminescence unit is emitted being modulated into a light beam.
Optionally, there is angle theta between the plane of multiple diffraction grating and the surface of grating platei, θi=0 °~20 °.
Optionally, the material of the optical modulation layer includes that polymethyl methacrylate, styrene methyl methacrylate are total
Polymers or polycarbonate, each diffraction grating include the multiple regular arrays opened up on the grating planar surface pit or
Protrusion, multiple pits or protrusion it is of same size.
It optionally, further include the diffusion layer, the diffusion layer is located at the optical modulation layer adjacent to the display panel one
The top of side surface.
Optionally, the M sub-pixel includes through the first monochromatic first sub-pixel, through second monochromatic the
Two sub-pixels and the transmission monochromatic third sub-pixel of third；The M luminescence unit includes outgoing first monochromatic first
Luminescence unit, the second monochromatic second luminescence unit of outgoing and the outgoing monochromatic third luminescence unit of third；The light tune
Preparative layer is used to for the first monochromatic light that first luminescence unit is emitted being modulated into N number of light beam, and N number of light beam difference directive is N number of
The second monochromatic light that second luminescence unit is emitted is modulated into N number of light beam by the first sub-pixel, and N number of light beam distinguishes directive N
The third monochromatic light that the third luminescence unit is emitted is modulated into N number of light beam by a second sub-pixel, and N number of light beam is penetrated respectively
To N number of third sub-pixel.
Optionally, first monochromatic light includes feux rouges, and second monochromatic light includes green light, the third monochromatic light packet
Blue light, N=2~6 are included, the luminescence unit includes time millimeter light emitting diode Mini LED.
The embodiment of the invention also provides a kind of backlight modules, described to shine including the folded luminescent layer and optical modulation layer set
Layer includes the multiple light sources unit of matrix arrangement, and each light source unit includes that the difference of outgoing respectively of periodic arrangement is monochromatic
M luminescence unit, the optical modulation layer are used to the monochromatic light that each luminescence unit is emitted being modulated into the different N number of light of the angle of emergence
Beam, and each light beam has the exit direction of setting；Wherein, M is the positive integer more than or equal to 3, and N is more than or equal to 2
Positive integer.
Optionally, the optical modulation layer includes grating plate, and is arranged on the grating plate and matrix arrangement
Multiple raster units, each raster unit include M grating portion of periodic arrangement, a grating in M grating portion
The position in portion is corresponding with the position of a luminescence unit in the M luminescence unit, and each grating portion is used for will be corresponding
The monochromatic light of luminescence unit outgoing is modulated into the different N number of light beam of the angle of emergence.
Optionally, the grating plate is arranged on the surface of the luminescent layer side in M grating portion, or
It is arranged on surface of the grating plate far from the luminescent layer side.
Optionally, each grating portion includes the different diffraction grating of multiple screen periods for setting gradually, each diffraction light
Grid are used to the monochromatic light that the luminescence unit is emitted being modulated into a light beam.
Optionally, there is angle theta between the plane of multiple diffraction grating and the surface of grating platei, θi=0 °~20 °.
Optionally, the material of the optical modulation layer includes that polymethyl methacrylate, styrene methyl methacrylate are total
Polymers or polycarbonate, each diffraction grating include the multiple regular arrays opened up on the grating planar surface pit or
Protrusion, multiple pits or protrusion it is of same size.
It optionally, further include the diffusion layer, the diffusion layer is located at the optical modulation layer far from the luminescent layer side
The top on surface.
Optionally, the M luminescence unit includes the first monochromatic first luminescence unit of outgoing, the second monochromatic light of outgoing
The second luminescence unit and outgoing the monochromatic third luminescence unit of third；First monochromatic light includes feux rouges, and described second
Monochromatic light includes green light, and the third monochromatic light includes blue light；N=2~6；The luminescence unit includes time millimeter light-emitting diodes
Pipe Mini LED.
The embodiment of the invention provides a kind of backlight module and display devices, by the way that light modulation is arranged in backlight module
Layer, optical modulation layer are used to the monochromatic light that each luminescence unit is emitted being modulated into the different multiple light beams of the angle of emergence, and multiple light
Beam is incident on multiple sub-pixels through same color respectively, does not need to carry out light mixing to monochromatic light, it is uneven to eliminate light mixing
The problem of, light utilization efficiency and colour gamut are improved, while reducing power consumption.
Certainly, implement any of the products of the present invention or method it is not absolutely required at the same reach all the above excellent
Point.Other features and advantages of the present invention will illustrate in subsequent specification embodiment, also, partly implement from specification
It is become apparent in example, or understand through the implementation of the invention.The purpose of the embodiment of the present invention and other advantages can pass through
Specifically noted structure is achieved and obtained in the specification, claims and drawings.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.Attached drawing
In the shapes and sizes of each component do not reflect actual proportions, purpose is schematically illustrate the content of present invention.
Fig. 1 is the structural schematic diagram of the display device of that present invention first embodiment；
Fig. 2 is the structural schematic diagram of first embodiment of the invention optical modulation layer；
Fig. 3 is the structural schematic diagram of diffraction grating；
Fig. 4 is the structural schematic diagram of first embodiment of the invention chirped diffraction grating；
Fig. 5 is the light deflection schematic diagram of first embodiment of the invention chirped diffraction grating；
Fig. 6 is the operation schematic diagram of first embodiment of the invention display device；
Fig. 7 is the overall schematic of first embodiment of the invention display device；
Fig. 8 is the structural schematic diagram of second embodiment of the invention optical modulation layer；
Fig. 9 is the structural schematic diagram of backlight module of the embodiment of the present invention.
Description of symbols:
100-backlight modules；200-display panels；10-backlight substrates；
11-luminescent layers；12-optical modulation layers；13-diffusion layers；
111-the first luminescence unit；112-the second luminescence unit；113-third luminescence units；
121-the first grating portion；122-the second grating portion；123-third grating portions；
201-the first sub-pixel；202-the second sub-pixel；203-third sub-pixels；
120-grating plates；30-chirped diffraction gratings；The first diffraction grating of 30A-；
The second diffraction grating of 30B-；30C-third diffraction grating；The 4th diffraction grating of 30D-.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawings and examples.Following embodiment
For illustrating the present invention, but it is not intended to limit the scope of the invention.It should be noted that in the absence of conflict, the application
In embodiment and embodiment in feature can mutual any combination.
Through present inventor the study found that existing colour mixture scheme there are the non-uniform problems of light mixing, mainly due to existing
There is backlight module that cannot provide caused by reasonable light mixing distance.Certain light mixing is needed since three kinds of monochromatic light are mixed into white light
Distance, and existing backlight module in order to meet slimming require be generally designed to thin structure so that monochromatic light only by compared with
Short-range light mixing, light mixing is insufficient, thus causes light mixing uneven.Although passing through the arrangement for changing three kinds of monochrome Mini LED
Mode can improve uniformity to a certain extent, but can not achieve effective colour mixture.The main body of available liquid crystal display device
Structure includes display panel and backlight module, and display panel includes the array substrate (Array) and color membrane substrates to box (Cell)
(Color Filter, CF), is arranged liquid crystal layer between array substrate and color membrane substrates.Color membrane substrates include spaced black square
Battle array (Black Matrix) and the chromatic photoresist being arranged between black matrix, chromatic photoresist include forming red (R) sub-pixel
Red photoresist, the green photoresist for forming green (G) sub-pixel and the blue light resistance for forming blue (B) sub-pixel, for transmission
Light be filtered, the light of light transmission corresponding color.Since there are certain photoresists for chromatic photoresist, when backlight module is emitted
White light when penetrating chromatic photoresist, one third light energy can be consumed, cause light extraction efficiency low low with emitting brightness, is i.e. light is sharp
It is low with rate.In order to improve display brightness, needs to increase the output of Mini LED, in turn result in power consumption raising.Simultaneously as existing
The white light light mixing of backlight module outgoing is uneven, not only increases the consumption that white light penetrates chromatic photoresist, and influences to penetrate light
Three color peak values and half-wave it is wide, make to be emitted photochromic domain bad.Therefore, existing colour mixture scheme there are light mixings uneven, light utilization efficiency
Low, the problems such as power consumption is big and colour gamut is bad.
It is asked to solve that light mixing existing for existing colour mixture scheme is uneven, light utilization efficiency is low, power consumption is big and colour gamut is bad etc.
Topic, the embodiment of the invention provides a kind of display devices.The main structure of display device of the embodiment of the present invention includes display panel
And backlight module, display panel include multiple pixel units of matrix arrangement, each pixel unit includes point of periodic arrangement
Not Tou Guo different monochromatic M sub-pixels, backlight module includes folding the luminescent layer and optical modulation layer set, and luminescent layer includes matrix
The multiple light sources unit of arrangement, each light source unit include the different monochromatic M list that shines of the outgoing respectively of periodic arrangement
Member, optical modulation layer are located at luminescent layer adjacent to the top of one side surface of display panel, and optical modulation layer is for going out each luminescence unit
The monochromatic light penetrated is modulated into the different N number of light beam of the angle of emergence, and N number of light beam distinguishes the N number of sub-pixel of directive, luminescence unit emergent light
Color and N number of sub-pixel it is identical through the color of light, M is the positive integer more than or equal to 3, and N is just whole more than or equal to 2
Number.
The embodiment of the invention provides a kind of display devices, and optical modulation layer is arranged in backlight module, and optical modulation layer is used for
The monochromatic light that each luminescence unit is emitted is modulated into multiple light beams, and multiple light beams are incident on respectively through the more of same color
A sub-pixel does not need to carry out light mixing to monochromatic light, eliminates the non-uniform problem of light mixing, improve light utilization efficiency and colour gamut,
Power consumption is reduced simultaneously.
Below by the technical solution of specific embodiment the present invention will be described in detail embodiment.
First embodiment
Fig. 1 is the structural schematic diagram of the display device of that present invention first embodiment, illustrates M=3 situation.As shown in Figure 1, this
The main structure of embodiment display device includes backlight module 100 and display panel 200.Display panel 200 is arranged including matrix
Multiple pixel units, each pixel unit includes the first sub-pixel 201, the second sub-pixel 202 and third of periodic arrangement
Sub-pixel 203, three sub-pixels form a pixel unit P, form pixel unit array, the first sub-pixel 201, the second sub- picture
Element 202 and third sub-pixel 203 are respectively used to through the first monochromatic light, the second monochromatic light and third monochromatic light.Backlight module 100
Including backlight substrate 10, luminescent layer 11 and optical modulation layer 12, luminescent layer 11 is located at backlight substrate 10 towards 200 side of display panel
The top on surface, optical modulation layer 12 are located at top of the luminescent layer 11 towards 200 1 side surface of display panel.Luminescent layer 11 is included in
The multiple light sources unit that matrix is arranged in backlight substrate 10, each light source unit includes the first luminescence unit of periodic arrangement
111, the second luminescence unit 112 and third luminescence unit 113, the first luminescence unit 111, the second luminescence unit 112 and third hair
Light unit 113 is respectively used to the first monochromatic light of outgoing, the second monochromatic light and third monochromatic light, and three luminescence units form a light
Source unit B forms light source unit array, the backlight as liquid crystal display.In structure shown in Fig. 1, a light source unit B and two
A pixel unit P is corresponding, i.e., a luminescence unit is corresponding with two sub-pixels.Optical modulation layer 12 is used to that i-th to shine single
I-th monochromatic light of member outgoing is modulated into the different N number of light beam of the angle of emergence, and N number of light beam distinguishes N number of i-th sub-pixel of directive.Wherein, N
For the positive integer more than or equal to 2, i=the first, the second and third.In the present embodiment " top that A is located at B surface " either
A is directly contacted with B, is also possible to spaced apart between A and B.In addition, " light beam " refers to that the angle of emergence is identical in the present embodiment
Light cluster.
Fig. 2 is the structural schematic diagram of first embodiment of the invention optical modulation layer.As shown in Fig. 2, the present embodiment optical modulation layer
12 include grating plate 120, and setting grating plate 120 towards on 11 1 side surface of (neighbouring) luminescent layer matrix arrange
Multiple raster units, each raster unit include the first grating portion 121, the second grating portion 122 and third light of periodic arrangement
Grid portion 123, three grating portions form a raster unit G, form raster unit array.In the present embodiment, a raster unit G
Corresponding with a light source unit B, i.e., a raster unit G is corresponding with two pixel unit P, wherein the first grating portion 121
Position it is corresponding with the position of the first luminescence unit 111, the position of the position in the second grating portion 122 and the second luminescence unit 112
Set corresponding, the position in third grating portion 123 is corresponding with the position of third luminescence unit 113.In the present embodiment, position is opposite
It should refer to, orthographic projection of the grating portion in backlight substrate includes orthographic projection of the luminescence unit in substrate.It uses in the first grating portion 121
The different N number of light beam of the angle of emergence is made in the first monochromatic light line transfer for being emitted the first luminescence unit 111, N number of light beam is penetrated respectively
To N number of first sub-pixel, the second monochromatic light line transfer that the second grating portion 122 is used to for the second luminescence unit 112 being emitted is made out
The different N number of light beam of firing angle, N number of light beam distinguish N number of second sub-pixel of directive, and third grating portion 123 is used to shine third single
The different N number of light beam of the angle of emergence is made in the third monochromatic light line transfer of 113 outgoing of member, and N number of light beam distinguishes the N number of third picture of directive
Element.
In the present embodiment, the first grating portion 121, the second grating portion 122 and third grating portion 123 are all made of chirped diffraction light
Grid structure.Diffraction grating (Diffraction Grating) is a kind of beam splitter, belongs to one of grating, diffraction grating
By regular structure, modulate the amplitude of incident light and phase by periodic spatial, it can be by identical incident condition
The monochromatic light of a branch of incidence can be also divided into multi beam emergent light to different directions by the optical diffraction of lower different wave length.According to light
Principle is learned, light is in propagation path, and after encountering opaque or transparent barrier or aperture (narrow slit), cut-through object is generated
The diffraction of the phenomenon that deviateing straightline propagation referred to as light.Fig. 3 is the structural schematic diagram of diffraction grating.Diffraction grating is by plate
It opens up multiple regularly arranged pits on surface or convexes to form, multiple regularly arranged pits or convex to form regularity
The light of structure, straightline propagation is retrodeviated through pit from straightline propagation direction.As shown in figure 3, by the surface of transparent plate
Offer multiple pits or protrusion, multiple pits or protrusion are regularly arranged, and pit is as light transmissive region, width a, pit it
Between protrusion be not through region as light, width b forms the diffraction grating of screen periods d, d=a+b.
Diffraction grating is determined the deflection of light by following grating formula:
d(n*sinθm+sinθi)=m* λ
That is, θm=sin-1[(m*λ/d–sinθi)/n]
Wherein, θmFor the angle of emergence of diffraction light, θiFor the incidence angle of incident light, if diffraction light and incident light in normal two sides,
θm< 0, if diffraction light and incident light are in the ipsilateral of normal, θm> 0, n are the refractive index of grating plate, and m is diffraction time, λ be into
The wavelength of light is penetrated, d is screen periods.In above-mentioned grating formula, it is believed that incident light is from air (refractive index=1) to diffraction grating
It is incident.
According to grating formula it is found that output angle θmRespectively with incidence angle, the refractive index of diffraction grating, incident light wavelength and
Screen periods are related, wherein output angle θmIt is directly proportional to the wavelength X of incident light, it is inversely proportional with screen periods d.That is, light
Grid cycle d is bigger, output angle θmSmaller, i.e. the degree of the incident light direction of diffraction light direction deviation is smaller, and screen periods d is smaller,
Output angle θmBigger, i.e. the degree of the incident light direction of diffraction light direction deviation is bigger.
It, can be by adjusting grating since the degree that diffraction light direction deviates incident light direction is related with screen periods
The size in period changes the angle of emergence, the diffraction grating of different screen periods is arranged in different location, makes to be incident on different location
The angle of emergence of the incident light after the diffraction grating of different screen periods it is different, form chirped diffraction grating.One word of chirp is most
Early appearing in description-chirm tone of chirm is variation, and in physics, chirp is often used for describing a certain
Physical quantity is at any time or position is variation.In the present embodiment, " chirp " in chirped diffraction grating is for describing screen periods
Change this structure with the variation of spatial position.Fig. 4 is the structural representation of first embodiment of the invention chirped diffraction grating
Figure, is illustrated by taking a grating portion as an example.As shown in figure 4, grating portion includes grating plate 120, grating plate 120 is towards hair
Chirped diffraction grating 30 is formed on the surface (lower surface) of light unit.Wherein, chirped diffraction grating 30 includes setting gradually
Multiple diffraction grating, specifically include: the first diffraction grating 30A positioned at region 1, the second diffraction grating 30B positioned at region 2,
Third diffraction grating 30C positioned at region 3 and the 4th diffraction grating 30D positioned at region 4.The screen periods of multiple diffraction grating
Difference, the screen periods of the first diffraction grating 30A are greater than the screen periods of the second diffraction grating 30B, the second diffraction grating 30B's
Screen periods are greater than the screen periods of third diffraction grating 30C, and the screen periods of third diffraction grating 30C are greater than the 4th diffraction light
The screen periods of grid 30D.Each diffraction grating includes the pit of the multiple regular arrays opened up on 120 surface of grating plate,
The width of all pits is all the same, and the spacing between all adjacent pits is all the same, makes the grating of grating in each region
Period is all the same.In this way, four diffraction grating that setting position is different, screen periods are different constitute chirped diffraction grating 30.
Fig. 5 is the light deflection schematic diagram of first embodiment of the invention chirped diffraction grating, and structure carries out based on shown in Fig. 4
Explanation.In Fig. 4, since the surface of grating plate 120 towards luminescence unit is vertical with the collimated light that luminescence unit is emitted, figure
There is angle theta between the plane of chirped diffraction grating 30 and the lower surface of grating plate 120 formed in 4i, so that it is single to shine
The collimated light of member outgoing has incidence angle θi.In the present embodiment, the plane of chirped diffraction grating 30 refers to multiple regularly arranged
Plane where the upper surface (or lower surface) of pit or protrusion, incidence angle refer to incident light direction and chirped diffraction grating 30
Angle between the normal O of plane, the angle of emergence (angle of diffraction) refer to the method for the plane of diffraction light direction and chirped diffraction grating 30
Angle between line O.In the present embodiment, luminescence unit can use Mini LED, can also use LED, can both go out
Penetrate the preferable collimated light of collimation.In addition, light collimating structure, light can also be arranged on light source in order to improve collimation
Collimating structure is known to those skilled in the art institute, which is not described herein again.
As shown in Figure 4 and Figure 5, the collimated ray of luminescence unit outgoing is with approximately uniform incidence angle θiBe incident on its just on
The chirped diffraction grating 30 of side.Screen periods due to being located at the diffraction grating in region 1 are greater than the diffraction grating positioned at region 2
Screen periods, therefore when incident light is incident on 1 position range of region and 2 position range of region respectively, 1 position range of region
The output angle θ of diffraction lightm1Less than the output angle θ of the diffraction light of 2 position range of regionm2.Similarly, due to the diffraction positioned at region 2
The screen periods of grating are greater than the screen periods of the diffraction grating positioned at region 3, when incident light is incident on 2 position model of region respectively
When enclosing with 3 position range of region, the output angle θ of the diffraction light of 2 position range of regionm2Less than the diffraction light of 2 position range of region
Output angle θm3.That is, the angle of emergence of diffraction light has θm1<θm2<θm3Characteristic.For the monochromatic light of a branch of incidence, Zhou
The monochromic beam is diffracted into different by diffraction grating 30 of singing using the diffraction grating of different screen periods is formed in different location
Direction.Since the screen periods of diffraction grating in each region are identical, the direction of the diffraction light in the region is identical, is formed
Equidirectional a branch of emergent light.In this way, the monochromatic light of a branch of incidence is resolved into multi beam side by the present embodiment chirped diffraction grating 30
To different emergent lights.
Fig. 6 is the operation schematic diagram of first embodiment of the invention display device.As shown in fig. 6, display panel includes matrix
Multiple pixel units of arrangement, each pixel unit include periodic arrangement the first sub-pixel 201, the second sub-pixel 202 and the
Three sub-pixels 203, i.e. M=3, luminescent layer include the multiple light sources unit of matrix arrangement, and each light source unit includes periodically arranging
The first luminescence unit 111, the second luminescence unit 112 and the third luminescence unit 113 of column, optical modulation layer include the more of matrix arrangement
A raster unit, each raster unit include the first grating portion 121, the second grating portion 122 and third grating of periodic arrangement
Portion 123.Wherein, a raster unit is corresponding with a light source unit, a raster unit (i.e. a light source unit) and three
A pixel unit is corresponding.In a raster unit, the position of the position in the first grating portion 121 and the first luminescence unit 111
Corresponding, the position in the second grating portion 122 is corresponding with the position of the second luminescence unit 112, the position in third grating portion 123 with
The position of third luminescence unit 113 is corresponding.Meanwhile in a raster unit, the position in each grating portion and a pixel
The position of unit is corresponding, i.e., each grating portion is corresponding with the position of three sub-pixels.The present embodiment only gives a light
Source unit example corresponding with three pixel unit positions, i.e. N=3, when actual implementation, each light source unit can also be with two
It is a, four, the position of five or multiple pixel units it is corresponding, multiple pixel units corresponding with a light source unit position
It is as pixel unit group, the center in grating portion is corresponding with the center of pixel unit group.
In the present embodiment, each grating portion includes 3 different diffraction grating of position difference, screen periods, makes each hair
The monochromatic light of light unit outgoing forms the light beam of 3 different directions, and 3 light beams are incident on the identical sub-pixel of 3 colors respectively
In.Specifically, the first of the outgoing of the first luminescence unit 111 the monochromatic light (solid line) is incident respectively behind the first grating portion 121
Into the first sub-pixel 201 in 3 pixel units.The monochromatic light (dotted line) of the second of second luminescence unit 112 outgoing is passed through
Behind second grating portion 122, it is incident in the second sub-pixel 202 in 3 pixel units respectively.Third luminescence unit 113 is emitted
Third monochrome light (chain-dotted line) behind third grating portion 123, the third sub-pixel that is incident in 3 pixel units respectively
In 203.It should be noted that this embodiment scheme is to be diffracted into most of feux rouges of luminescence unit outgoing (by taking red as an example)
In red sub-pixel, it might have small part feux rouges and be incident on blue subpixels or green sub-pixels, equally, be incident on red son
The light of pixel also has blue light or green light, but these blue lights or green light can be filtered out by the red photoresist of red sub-pixel, only
There is feux rouges through red sub-pixel.In this way, a kind of most of emergent light of color is diffracted into through the monochromatic sub-pixel
In, i.e., in the incident light of each sub-pixel, the major part of incident light is the monochromatic light that it should be penetrated, and is partially that it should mistake
The other monochromatic light filtered, so that the light quantity that is filtered is reduced, light transit dose increases, and light energy loss reduces, light utilization efficiency and
Colour gamut increases substantially.Under identical display brightness, the output power of luminescence unit can be reduced, and then reduce power consumption.
As shown in Figure 5 and Figure 6, the relationship of incidence angle and the angle of emergence can also be write as:
θm=90 ° of-θi-αm
tanαm=h/ (PitchLuminescence unit* (3-5/N)) or αm=arctan [h/ (PitchLuminescence unit*(3-5/N)]
Wherein, h is the thickness of grating plate, PitchLuminescence unitSpacing between luminescence unit, N are a light source unit
The quantity of corresponding pixel unit group.
According to aforementioned formula as can be seen that screen periods minimum value is determined by maximum diffraction angle, by taking feux rouges as an example, refraction is taken
Rate n=1.5, diffraction time m=1, incidence angle θi=5 °, red light wavelength λ=0.63 μm, PitchLuminescence unit=200 μm, N=3, then
Screen periods minimum value dmin=1.8 μm.Screen periods maximum value is determined by least angle of the diffraction, still by taking feux rouges as an example, it is assumed that light
Almost zero deflection, taking least limit deflection angle is 1 °, then screen periods maximum value dmax=37 μm.
It should be noted that although the present embodiment is illustrated so that pit forms grating as an example, between pit and pit
The corresponding transmission of protrusion and block two states, but when actual implementation, be not limited to pit or bulge-structure and transmission and block
Two states can be not specifically limited herein using the other structures for forming grating, the present embodiment.In addition, pit or protrusion
Size range can be designed according to actual needs, make the width of pit close to screen periods, as far as possible to promote light
It can utilization rate.
Although the present embodiment is to have angle theta between the plane of chirped diffraction grating 30 and the lower surface of grating plate 120i
For be illustrated, but when actual implementation, chirped diffraction grating 30 can also be set up directly on to the following table of grating plate 120
On face, i.e., there is angle theta between the plane of chirped diffraction grating 30 and the lower surface of grating plate 120i=0.Structure shown in Fig. 6
Chirped diffraction grating 30 is arranged to inclined-plane, i.e. θi> 0 is because being emitted according to grating formula by adjusting screen periods d
Angle θmCan be positive and also be negative, when the angle of emergence be timing, diffraction light and incident light it is ipsilateral in normal, when the angle of emergence is negative, spread out
Light and incident light are penetrated in normal two sides.The light that second luminescence unit 112 as shown in FIG. 6 is emitted, by the second grating portion 122
Afterwards, i.e., the light that oriented left avertence turns, and the light that oriented right avertence turns.If θ is arrangedi=0, according to grating formula, pass through change
Screen periods can only change the size of the angle of emergence, but can not change the positive and negative of the angle of emergence, i.e., light can only deflect in one direction.
Angle theta when actual implementation, between the plane of multiple diffraction grating and the surface of grating plateiIt can be set to 0 °~20 °.?
In the angular range, can satisfy the light beam that the chirped diffraction grating of different location is modulated can point at multiple sub-pixels.
Practical application scene design in, the position of each sub-pixel of display panel be it is determining, chirped diffraction grating with
The distance between display panel is also determining, therefore the direction of emergent light can carry out essence by the optical simulation software of profession
Really design.The first monochromatic light is emitted with the first luminescence unit, 3 light beam difference are made in the first monochromatic light line transfer by the first grating portion
For 3 the first sub-pixels of directive, it is assumed that by the light beam directive sub-pixel 1 of 1 position of region, the light of 2 position of region
Beam is to sub-pixel 2, the light beam directive sub-pixel 3 of 3 position of region, according to the position of sub-pixel, the position in region and Zhou
It sings the distance between diffraction grating and display panel, that is, can determine the angle of emergence in region 1, region 2 and region 3.In this way, grating side
The wavelength of the refractive index of the angle of emergence, diffraction grating in journey, diffraction time and incident light is it is known that can be in setting incidence angle
Under know the screen periods that region 1, region 2 and region 3 should have, by design screen periods, can be realized first monochrome
Light makes light beam directive of 1 position of region by being emitted on designed light direction after chirped diffraction grating
Pixel 1, the light beam directive sub-pixel 2 of 2 position of region, the light beam directive sub-pixel 3 of 3 position of region.Certainly, light
There are the factors such as the refraction of multilayer dielectricity and reflection for transmission process, can also take in optical simulation, accurate to realize
Design.After the screen periods for designing each region according to light direction, that is, chemical etching, exposure development or plasma can be used
The techniques such as etching form pit or protrusion on grating planar surface.
When actual implementation, backlight module 100 can also include diffusion layer 13, diffusion layer 13 be located at optical modulation layer 12 towards show
The top for showing one side surface of panel, the sub-pixel for directive display panel after scattering the light penetrated sufficiently.
Fig. 7 is the overall schematic of first embodiment of the invention display device.As shown in fig. 7, the whole knot of display device
Structure includes luminescent layer 11, optical modulation layer 12, diffusion layer 13 and display panel 200, and luminescent layer 11 includes being arranged in backlight substrate
Light source unit array, as the backlight of liquid crystal display, optical modulation layer 12 includes setting towards 11 1 side surface of luminescent layer
On raster unit array, the display panel 200 of top layer includes pixel unit array, and diffusion layer 13 is arranged in optical modulation layer 12
Between display panel 200.Wherein, the position of a raster unit is corresponding with the position of a light source unit, with a picture
The position of plain unit (three sub-pixels) is corresponding.When actual implementation, optical modulation layer 12 can be contacted directly with luminescent layer 11, the two
It stacks and places, edge is fixed using metal backing and plastic frame, with traditional side-edge type backlight (Back Light
Unit, BLU) structure design is similar, and diffusion layer 13 is directly contacted with optical modulation layer 12, and display panel 200 and diffusion layer 13 are directly
Contact is stacked and is placed.Wherein, display panel 200 includes the array substrate being oppositely arranged and color membrane substrates, and is arranged in array
Liquid crystal layer is set between substrate and color membrane substrates, and array substrate includes the first substrate and the array structure that is arranged in the first substrate
Layer, array structure layer include grid line, data line, thin film transistor (TFT) and pixel electrode, are used to form the electric field of driving liquid crystal deflection.
Color membrane substrates include the second substrate and the color membrane structure layer that is arranged in the first substrate, and color membrane structure layer includes spaced black
Matrix and the chromatic photoresist being arranged between black matrix, chromatic photoresist include the red photoresist to form red sub-pixel, formed it is green
The green photoresist of sub-pixels and the blue light resistance for forming blue subpixels, are filtered for the light to transmission, only penetrate
The light of corresponding color.Although the present embodiment realizes light splitting by chirped diffraction grating, due to chirped diffraction grating beam splitting
With certain limit of resolution, consider further that mechanical structure assembles tolerance, it is difficult to ensure Unicolor back light is directed at monochromatic sub- picture completely
Element, therefore optical purity out is guaranteed by the filtering of chromatic photoresist.
Although the present embodiment is said so that the light that a luminescence unit is emitted is incident on 3 sub-pixels respectively as an example
It is bright, but when actual implementation, under the premise of guaranteeing brightness, the light of luminescence unit outgoing can be incident on 4,5 very
To 6 sub-pixels.It also may include four sub-pixels, sub-pixel in addition, may include three sub-pixels in a pixel unit
Arrangement mode can also use other arrangement modes, such as product word arrangement.Since a luminescence unit corresponds to multiple pixel lists
The light of member, the outgoing of a luminescence unit is incident on respectively in the sub-pixel of multiple same colors, thus is effectively reduced luminous
The quantity of unit can not only further decrease power consumption, but also can reduce cost.
In the present embodiment, luminescence unit can use Mini LED, can also use LED.First monochromatic light is feux rouges, the
Two monochromatic light are green light, and third monochromatic light is blue light, i.e. the first luminescence unit is the red Mini LED for being emitted feux rouges, the second hair
Light unit is the green Mini LED for being emitted green light, and third luminescence unit is the blue Mini LED for being emitted blue light.Correspondingly, the
One sub-pixel, the second sub-pixel and third sub-pixel are respectively red sub-pixel, green sub-pixels and blue subpixels.Mini
LED with high contrast, highlighted, yield is high, has abnormity cutting characteristic, better color rendering and finer HDR subregion etc.
Advantage, and without structures such as light guide plate, reflector plates, be conducive to the lightening of display device.
In the present embodiment, grating plate can be used transparent plastics material and be made, such as polymetylmethacrylate, benzene second
Alkene-methylmethacrylate copolymer MS or polycarbonate etc..Chirped diffraction grating can be by transparent plastics material surface
It prepares salient point or pit is formed, preparation method can be chemical etching, exposure development or plasma etching etc..
Display device provided in an embodiment of the present invention can be with are as follows: mobile phone, tablet computer, television set, display, notebook electricity
Any products or components having a display function such as brain, Digital Frame, navigator.
Above scheme can be seen that the present embodiment by the way that light is arranged between luminescent layer and display panel through this embodiment
Modulating layer, luminescent layer use chirped diffraction optical grating construction using multiple monochromatic luminescence units of outgoing, optical modulation layer, and chirp is spread out
It penetrates optical grating construction and the monochromatic light that each luminescence unit is emitted is modulated into the different light beam of multiple angles of emergence, multiple light beams enter respectively
The multiple sub-pixels being mapped to through same color utilize monochromatic Mini by the color-match of monochromatic Mini LED and sub-pixel
The narrow spectrum width characteristic of LED does not need not only to carry out light mixing to monochromatic light, eliminates the non-uniform problem of light mixing, and reduce
Light energy loss, increases light transit dose, improves light utilization efficiency and colour gamut.Under identical display brightness, it can reduce luminous
The output power of unit, and then reduce power consumption.
Second embodiment
Fig. 8 is the structural schematic diagram of second embodiment of the invention optical modulation layer.The present embodiment is aforementioned first embodiment
A kind of extension.As shown in figure 8, the present embodiment optical modulation layer 12 includes grating plate 120, and it is arranged remote in grating plate 120
From multiple raster units that matrix on 11 1 side surface of luminescent layer (upper surface) is arranged, each raster unit includes periodic arrangement
The first grating portion 121, the second grating portion 122 and third grating portion 123, multiple raster units form raster unit arrays.The
The different N number of light beam of the angle of emergence is made in the first monochromatic light line transfer that one grating portion 121 is used to for the first luminescence unit being emitted, N number of
Light beam distinguishes N number of first sub-pixel of directive, and the second grating portion 122 is used for the second monochromatic light line transfer for being emitted the second luminescence unit
The different N number of light beam of the angle of emergence is made, N number of light beam distinguishes N number of second sub-pixel of directive, and third grating portion 123 is used for third
The different N number of light beam of the angle of emergence, N number of N number of third of light beam difference directive is made in the third monochromatic light line transfer of luminescence unit outgoing
Pixel.
In the present embodiment, corresponding grating formula are as follows: d (sin θm+n*sinθi)=m* λ
Since the upper surface of grating plate is arranged in the chirped diffraction grating of the present embodiment, light is inclined since upper surface
Turn, it is therefore desirable to certain distance will be reserved between grating plate upper surface and diffusion layer above it, to guarantee to spread out by chirp
The light for penetrating grating can be incident in corresponding sub-pixel.The working principle of the present embodiment chirped diffraction grating and will be a branch of
Incident monochromatic light resolves into the contents such as the different emergent light in multi beam direction, and identical as previous embodiment, which is not described herein again.
3rd embodiment
Based on technical concept of the invention, the present invention also provides a kind of backlight module, backlight module includes the folded hair set
Photosphere and optical modulation layer, luminescent layer include the multiple light sources unit of matrix arrangement, and each light source unit includes periodic arrangement
The different monochromatic M luminescence unit of outgoing respectively, optical modulation layer is for the monochromatic light that each luminescence unit is emitted to be modulated into
The different N number of light beam of the angle of emergence, and each light beam has the exit direction of setting；Wherein, M is the positive integer more than or equal to 3,
N is the positive integer more than or equal to 2.
Fig. 9 is the structural schematic diagram of backlight module of the embodiment of the present invention, illustrates M=3 situation.As shown in figure 9, this implementation
Example backlight module includes backlight substrate 10, luminescent layer 11 and optical modulation layer 12, and luminescent layer 11 is located in backlight substrate 10, light modulation
Layer 12 is located at top of the luminescent layer 11 far from 10 1 side surface of backlight substrate.Luminescent layer 11 includes the matrix row in backlight substrate 10
The multiple light sources unit of cloth, each light source unit include the first luminescence unit 111 of periodic arrangement, the second luminescence unit 112
With third luminescence unit 113, the first luminescence unit 111, the second luminescence unit 112 and third luminescence unit 113 are respectively used to out
The first monochromatic light, the second monochromatic light and third monochromatic light are penetrated, multiple light sources unit forms the light source unit array as backlight.
Optical modulation layer 12 is used to for the i-th monochromatic light that the i-th luminescence unit is emitted being modulated into N number of light beam, and N number of light beam has the outgoing of setting
Direction.
In an implementation structure, optical modulation layer 12 includes grating plate 120, and is arranged in 120 direction of grating plate
The multiple light sources unit that matrix is arranged on 11 1 side surface of luminescent layer, each light source unit includes the first grating of periodic arrangement
Portion 121, the second grating portion 122 and third grating portion 123, multiple raster units form raster unit array.In another implementation
In structure, the first grating portion 121, the second grating portion 122 and third grating portion 123 are arranged in grating plate 120 far from luminescent layer
On 11 1 side surfaces.Wherein, a raster unit is corresponding with a light source unit, the position and first in the first grating portion 121
The position of luminescence unit 111 is corresponding, and the position in the second grating portion 122 is corresponding with the position of the second luminescence unit 112, third
The position in grating portion 123 is corresponding with the position of third luminescence unit 113.First grating portion 121 is used for the first luminescence unit
First monochromatic light line transfers of 111 outgoing are made the different N number of light beam of the angle of emergence, the different direction of N number of light beam difference directive, and second
The different N number of light beam of the angle of emergence is made in the second monochromatic light line transfer that grating portion 122 is used to for the second luminescence unit 112 being emitted, N number of
Light beam distinguishes the different direction of directive, and third grating portion 123 is used for the third monochromatic light line transfer for being emitted third luminescence unit 113
The different N number of light beam of the angle of emergence, the different direction of N number of light beam difference directive is made.
Wherein, the first grating portion 121, the second grating portion 122 and third grating portion 123 are all made of chirped diffraction grating knot
Structure.Chirped diffraction grating includes the multiple diffraction grating set gradually, and the screen periods of multiple diffraction grating are different, each diffraction
Grating includes the pit of the multiple regular arrays opened up on 120 surface of grating plate, and the width of all pits is all the same, institute
Spacing between some adjacent pits is all the same, keeps the screen periods of grating in each region all the same.Multiple diffraction grating
There is angle theta between plane and the surface of grating platei, θi=0 °~20 °.Structure, working principle in relation to chirped diffraction grating
And the monochromatic light of a branch of incidence is resolved into the contents such as the different emergent light in multi beam direction, in the aforementioned embodiment specifically
Bright, which is not described herein again.
Since each grating portion includes the diffraction grating that multiple positions are different, screen periods are different, make each luminescence unit
The monochromatic light of outgoing forms the exit direction of multiple settings, and the exit direction of setting can be arranged according to actual needs, such as penetrate
The sub-pixel of some position into display panel.
When actual implementation, backlight module can also include diffusion layer 13, and diffusion layer 13 is located at optical modulation layer 12 far from backlight
The top of 10 1 side surface of substrate, the sub-pixel for directive display panel after scattering the light penetrated sufficiently.
Wherein, luminescence unit can use Mini LED, and the first monochromatic light is feux rouges, and the second monochromatic light is green light, third
Monochromatic light is blue light, i.e. the first luminescence unit is the red Mini LED for being emitted feux rouges, and the second luminescence unit is outgoing green light
Green Mini LED, third luminescence unit are the blue Mini LED for being emitted blue light.Mini LED have high contrast, it is highlighted,
Yield is high, has the advantages such as abnormity cutting characteristic, better color rendering and finer HDR subregion, and without light guide plate, reflection
The structures such as piece are conducive to the lightening of display device.
Wherein, grating plate can be used transparent plastics material and be made, such as polymetylmethacrylate, styrene-first
Base methyl acrylate copolymer MS or polycarbonate etc..Chirped diffraction grating can be by preparing on transparent plastics material surface
Salient point or pit are formed, and preparation method can be chemical etching, exposure development or plasma etching etc..
Above scheme can be seen that the present embodiment by luminescent layer and optical modulation layer structure through this embodiment, luminescent layer
Using multiple monochromatic luminescence units of outgoing, optical modulation layer uses chirped diffraction optical grating construction, and chirped diffraction optical grating construction will
The monochromatic light of each luminescence unit outgoing is modulated into multiple light beams, and multiple light beams are distinguished directive multiple directions, do not needed to monochrome
Light carries out light mixing, eliminates the non-uniform problem of light mixing, reduces light energy loss, increases light transit dose, improves light benefit
With rate and colour gamut.Under identical display brightness, the output power of luminescence unit can be reduced, and then reduce power consumption.
In the description of the embodiment of the present invention, it is to be understood that term " middle part ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom" "inner", "outside" be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the description of the embodiment of the present invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (17)
1. a kind of display device, which is characterized in that including display panel and backlight module, the display panel includes matrix arrangement
Multiple pixel units, each pixel unit includes periodic arrangement respectively through different monochromatic M sub-pixels, described
Backlight module includes the folded luminescent layer and optical modulation layer set, and the luminescent layer includes the multiple light sources unit of matrix arrangement, each
Light source unit includes the different monochromatic M luminescence unit of outgoing respectively of periodic arrangement, and the optical modulation layer is located at described
Luminescent layer is used for the monochrome for being emitted each luminescence unit adjacent to the top of one side surface of display panel, the optical modulation layer
The light modulation N number of light beam different at the angle of emergence, and N number of light beam distinguishes the N number of sub-pixel of directive, the face of the luminescence unit emergent light
Color is identical through the color of light as N number of sub-pixel, and M is the positive integer more than or equal to 3, and N is just whole more than or equal to 2
Number.
2. display device according to claim 1, which is characterized in that the optical modulation layer includes grating plate, Yi Jishe
Multiple raster units that on the grating plate and matrix is arranged are set, each raster unit includes M light of periodic arrangement
Grid portion, the position in a grating portion in M grating portion and the position of a luminescence unit in the M luminescence unit
Corresponding, each grating portion is used to the monochromatic light that corresponding luminescence unit is emitted being modulated into the different N number of light beam of the angle of emergence.
3. display device according to claim 2, which is characterized in that M grating portion is arranged in the grating plate
On the surface of the neighbouring luminescent layer side, or it is arranged on surface of the grating plate far from the luminescent layer side.
4. display device according to claim 2, which is characterized in that each grating portion includes the multiple gratings set gradually
Period different diffraction grating, each diffraction grating are used to the monochromatic light that the luminescence unit is emitted being modulated into a light beam.
5. display device according to claim 4, which is characterized in that the plane of multiple diffraction grating and the table of grating plate
There is angle theta between facei, θi=0 °~20 °.
6. display device according to claim 4, which is characterized in that the material of the optical modulation layer includes polymethyl
Sour methyl esters, styrene-methylmethacrylate copolymer or polycarbonate, each diffraction grating are included in the grating plate table
The pit or protrusion of the multiple regular arrays opened up on face, multiple pits or protrusion it is of same size.
7. display device according to claim 1, which is characterized in that further include the diffusion layer, the diffusion layer is located at
Top of the optical modulation layer adjacent to one side surface of display panel.
8. any display device according to claim 1~7, which is characterized in that the M sub-pixel includes penetrating first
Monochromatic first sub-pixel, through the second monochromatic second sub-pixel and penetrate the monochromatic third sub-pixel of third；Institute
State M luminescence unit include outgoing the first monochromatic first luminescence unit, outgoing the second monochromatic second luminescence unit and
It is emitted the monochromatic third luminescence unit of third；The first monochrome that the optical modulation layer is used to for first luminescence unit being emitted
Light modulation is at N number of light beam, and N number of light beam distinguishes N number of first sub-pixel of directive, single by the second of second luminescence unit outgoing
Coloured light is modulated into N number of light beam, and N number of light beam distinguishes N number of second sub-pixel of directive, the third that the third luminescence unit is emitted
Monochromatic light is modulated into N number of light beam, and N number of light beam distinguishes the N number of third sub-pixel of directive.
9. display device according to claim 8, which is characterized in that first monochromatic light includes feux rouges, and described second
Monochromatic light includes green light, and the third monochromatic light includes blue light, and N=2~6, the luminescence unit includes time millimeter light-emitting diodes
Pipe Mini LED.
10. a kind of backlight module, which is characterized in that including the folded luminescent layer and optical modulation layer set, the luminescent layer includes matrix
The multiple light sources unit of arrangement, each light source unit include the different monochromatic M list that shines of the outgoing respectively of periodic arrangement
Member, the optical modulation layer are used to for the monochromatic light that each luminescence unit is emitted being modulated into the different N number of light beam of the angle of emergence, and each
Light beam has the exit direction of setting；Wherein, M is the positive integer more than or equal to 3, and N is the positive integer more than or equal to 2.
11. backlight module according to claim 10, which is characterized in that the optical modulation layer includes grating plate, and
It is arranged on the grating plate and multiple raster units of matrix arrangement, each raster unit includes M of periodic arrangement
Grating portion, the position in a grating portion in M grating portion and the position of a luminescence unit in the M luminescence unit
Set corresponding, each grating portion is used to the monochromatic light that corresponding luminescence unit is emitted being modulated into the different N number of light beam of the angle of emergence.
12. backlight module according to claim 11, which is characterized in that the setting of M grating portion is flat in the grating
Plate is on the surface of the luminescent layer side, or surface of the grating plate far from the luminescent layer side is arranged in
On.
13. backlight module according to claim 11, which is characterized in that each grating portion includes the multiple light set gradually
The different diffraction grating of grid cycle, each diffraction grating are used to the monochromatic light that the luminescence unit is emitted being modulated into a light
Beam.
14. backlight module according to claim 13, which is characterized in that the plane of multiple diffraction grating and grating plate
There is angle theta between surfacei, θi=0 °~20 °.
15. backlight module according to claim 14, which is characterized in that the material of the optical modulation layer includes poly- methyl-prop
E pioic acid methyl ester, styrene-methylmethacrylate copolymer or polycarbonate, each diffraction grating are included in the grating plate
The pit or protrusion of the multiple regular arrays opened up on surface, multiple pits or protrusion it is of same size.
16. backlight module according to claim 10, which is characterized in that it further include the diffusion layer, the diffusion layer position
In top of the optical modulation layer far from one side surface of luminescent layer.
17. 0~16 any backlight module according to claim 1, which is characterized in that the M luminescence unit includes
Penetrate the first monochromatic first luminescence unit, the second monochromatic second luminescence unit of outgoing and the outgoing monochromatic third of third
Luminescence unit；First monochromatic light includes feux rouges, and second monochromatic light includes green light, and the third monochromatic light includes indigo plant
Light；N=2~6；The luminescence unit includes time millimeter light emitting diode Mini LED.
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| CN112151566A (en) * | 2019-06-28 | 2020-12-29 | 成都辰显光电有限公司 | Display panel, display device and preparation method of display panel |
| CN113281940A (en) * | 2021-07-23 | 2021-08-20 | 成都工业学院 | High-resolution display device based on super surface |
| US20240036397A1 (en) * | 2021-12-10 | 2024-02-01 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
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| CN113281940B (en) * | 2021-07-23 | 2021-09-24 | 成都工业学院 | High-resolution display device based on super surface |
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| US12072576B2 (en) * | 2021-12-10 | 2024-08-27 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
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