CN209118668U - A kind of optical system for realizing multi-screen seamless tiled display - Google Patents
A kind of optical system for realizing multi-screen seamless tiled display Download PDFInfo
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- CN209118668U CN209118668U CN201821615019.7U CN201821615019U CN209118668U CN 209118668 U CN209118668 U CN 209118668U CN 201821615019 U CN201821615019 U CN 201821615019U CN 209118668 U CN209118668 U CN 209118668U
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Abstract
The utility model provides a kind of optical system for realizing multi-screen seamless tiled display, including reflection type optical element and transmission-type prism optical element；Wherein, the reflection type optical element is covered in front of the piece that multi-screen is spliced to form, and the angle of apex angle or top extended line is less than 35o；The transmission-type prism optical element is made of multiple groups prism, the transmission-type prism optical element is set to the surface of the reflection type optical element with screen in parallel, its main function is to cooperate the further expansion viewing visual angle in the way of refractive power jointly with reflection type optical element, and smoothed image, so that the image transition of stitching portion is naturally, reach the seamless spliced viewing of wide-angle truly.The utility model utilizes the optical element of autonomous Design, it is proposed the optical system that piece is generated after a kind of elimination multi-screen splices, the program aims at a kind of seamless tiled display effect of super large viewing visual angle, and in the image excess smoothness of edge joint position viewing and does not have apparent luminance difference with the image near piece.
Description
Technical field
The utility model relates to optical device and System design technology field more particularly to a kind of seamless spellings of realization multi-screen
Connect the optical system of display.
Background technique
In recent years, large-scale LCD panel rapidly develops, although large-sized LCD can accomplish 80 cun even 100
It is very little, but in the occasion for needing large screen display, still it cannot meet the needs of users.Domestic and international large scale large-screen splicing at present
It is all using LCD, the independent display unit such as DLP carries out simple physics and is spliced, since each display unit is only
Vertical encapsulation, due to LCD driving circuit and technique, the piece of one fixed width can be generated.So playing picture in display
When face, it will lead to display picture and be divided, destroy the continuity and integrality of display image, seriously affect viewing experience.
There are two types of now general to the processing of such piece both at home and abroad: the first is to add LED point in display unit frame
Battle array, this method higher cost, and it is not easy volume production, display effect is also not highly desirable；Second is reached by curved glass
Refraction effect, the achievable visible angle for watching seamless delivery of content of this method is smaller, or even the meeting in larger viewing visual angle
Watch the piece of amplification.This curved glass is easy to be affected by ambient light, and observer can pass through curved glass part
It is easier to watch brighter environment light to influence visual effect.
Patent document 1 (China Patent Publication No. CN108230913A) proposes the new method of one kind to eliminate mosaic screen
Piece.The optical texture of this method is made of optics cover board and triangular prism shaped light-strip, by the collective effect of the two parts
To realize the purpose for eliminating piece.However this method still has some open questions:
(1) human eye with this solution in the brightness of image watched of triangular prism shaped light-strip will significantly lower than nearby other
To seriously affect display effect, (brightness of image that i.e. edge joint position is watched is significantly lower than non-piece for the brightness of display area content
The brightness of image at place, this phenomenon become apparent in larger viewing visual angle).In order to improve this problem, need to comprehensively consider
The characteristic of the light distribution of display picture element and human eye physiological vision is calculated the value model of the triangular prism light-strip apex angle
It encloses, this phenomenon can be only effectively improved within the scope of this, however does not relate to this problem in the patent.
(2) bending part 104 of cover board plays the amplification similar to convex lens, the radian of this part usually compared with
Thickness greatly so as to cause entire cover board is thicker, and this provides for improved the difficulty of processing of entire cover board and processing costs, so that whole
The assembly of a system is more not easy.In addition, curved part is easy to be affected by ambient light, observer can pass through curved glass
It is partially viewed to brighter environment light to influencing visual effect.
Utility model content
The existing deficiency for eliminating display piece scheme is solved in order to optimize, the utility model utilizes the optics of autonomous Design
Element proposes that the optical system that piece is generated after a kind of elimination multi-screen splices, the program aim at a kind of super large viewing view
The seamless tiled display effect at angle, and in the image excess smoothness of edge joint position viewing and without apparent luminance difference.This reality
It is realized with novel especially by following technical solution:
A kind of optical system for realizing multi-screen seamless tiled display, including reflection type optical element and transmission-type prismatic light
Learn element；Wherein, the reflection type optical element is covered in front of the piece that multi-screen is spliced to form, the reflective optic member
The apex angle of part or the angle of top extended line are less than 35o；The transmission-type prism optical element is made of multiple groups prism, described
Transmission-type prism optical element is set to the surface of the reflection type optical element with screen in parallel, main function be with instead
The formula optical element of penetrating cooperates further expansion viewing visual angle and smoothed image in the way of refractive power jointly, so that the figure of stitching portion
As transition naturally, reaching the seamless spliced viewing of wide-angle truly.
The section of the reflection type optical element is triangle, polygon, circle as a further improvement of the utility model,
Arc, and the surface of the reflection type optical element has all carried out reflection processing.
The reflection processing on the surface of the reflective structure optical element refers to as a further improvement of the utility model,
Reflective foil is plated on its surface or by there is the material of albedo to realize reflected light surface polishing or attaching
The technique of line effect.
As a further improvement of the utility model, the bottom width L2 of the reflective structure optical element be greater than etc.
In the width L1 of piece 102, the value range of height L3 is: 0~50mm.
The width S 2 of the transmission-type prism optical element, which is more than or equal to, as a further improvement of the utility model, spells
The width L1 of seam 102.
The value of the transmission-type prism optical element and piece distance L5 as a further improvement of the utility model,
Range is: 0~50mm.
The transmission-type prism optical element is by N layers of compound prism battle array as a further improvement of the utility model,
Column composition, N are more than or equal to 1.
The reflective structure optical element 103 and transmission-type lens optical as a further improvement of the utility model,
The value range of the distance between element 104-A L4 is: 0~50mm.
The transmission-type prism optical element passes through UV cure process system as a further improvement of the utility model,
Make, material therefor is UV glue；Alternatively, the transmission-type prism optical element is made of hot-forming technique, material is
Plastic resin material or glass material；Alternatively, the transmission-type prism optical element is made of traditional cold machining process,
Its material is plastic resin material or glass material.
Detailed description of the invention
Fig. 1 is the display screen diagrams that four pieces of displays with frame are spliced；
Fig. 2 is the structural schematic diagram of the optical system of the utility model；
Fig. 3 is the optical path distribution map of the optical system of the utility model；
Fig. 4 is the optical path distribution map of reflection type optical element；
Fig. 5 is the curve graph of contrast sensitivity factor C；
Fig. 6 is pixel light emission intensity；
Fig. 7 is the structural schematic diagram of reflection type optical element；
Fig. 8 is several preferred structure schematic diagrames of reflective structure optical element；
Fig. 9 is the optical path distribution map of transmission-type prism optical element；
Figure 10 is the top view of transmission-type prism optical element；
Figure 11 is the sectional view of transmission-type prism optical element；
Figure 12 is several preferred structure schematic diagrames of reflective structure optical element；
Figure 13 (a) is the schematic structural diagram of the first embodiment of the optical system of the utility model；
Figure 13 (b) is the schematic structural diagram of the second embodiment of the optical system of the utility model；
Figure 13 (c) is the 3rd embodiment structural schematic diagram of the optical system of the utility model；
Figure 13 (d) is the fourth embodiment structural schematic diagram of the optical system of the utility model；
Figure 13 (e) is the 5th example structure schematic diagram of the optical system of the utility model；
Figure 13 (f) is the sixth embodiment structural schematic diagram of the optical system of the utility model.
Specific embodiment
The present invention will be further described for explanation and specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the display screen that four pieces of displays with frame are spliced, wherein 101 represent display
Display area, 102 dash areas indicate the frame of display not displayable content, and the region K in dashed middle line box is two pieces
The part that display left and right side frame is connected, as piece, width L1.After make displays splicing, when playing display content,
The presence of display splicing regions K causes picture to be divided, very influence viewing experience.
The utility model proposes scheme be exactly optical texture in the front covering design of display stitching portion, make human eye
When watching the display screen that multi-display is spliced, the display splicing regions K piece formed is disappeared on visual perception
It removes.Wherein, it can be liquid crystal display (LCD display) for the display of splicing, be also possible to plasma display
(PDP display), is also possible to OLED display, and being also possible to rear projection display, (DLP rear-projection shows that LED rear-projection is shown
Deng), it is also possible to cathode-ray tube display etc..
In Fig. 2,101 be the display area of display, and 102 be piece when display splices, and 103 be reflective optic
Element, the transmission-type prism optical element that 104-A is made of multiple prisms, 104-B are the production of the transparent materials such as PET, PMMA
Optics plate or membrane material.
Reflection type optical element 103, two sides are the surface with reflectivity properties.Reflection type optical element 103 is splicing
Bring piece is completely covered, so that human eye is not observed piece but watch the image on display by its reflection after in
Hold.The transmission-type prism optical element 104-A being made of multiple prisms, mainly there are two aspects for its effect: one is improving
The flatness of picture material and other display area picture materials on catoptric arrangement；Folding is utilized second is that cooperating jointly with catoptric arrangement
The mode further expansion viewing visual angle of light (watches and eliminates piece and the angle of visibility smoothly without obvious luminance difference content
Degree), reach the seamless spliced viewing of wide-angle truly.
It is illustrated in figure 3 integrally-built optical path distribution map, the light that piece 102 issues is complete by reflective optical devices 103
It blocks entirely, no matter observer will not watch piece 102 at any angle.Human eye is in the image that edge joint position is watched at this time
Content of the image in other regions after the effect of 103 and 104-A common modulation on display, such as display area in Fig. 3
The light that pixel Q is issued enters the eyes of observer after the modulating action of 103 and 104-A.Observer is with different perspectives
To be made by the pixel on display areas different on display by the modulation of 103 and 104-A in the image that stitching portion is observed
With rear into human eye.
Below by the effect and ginseng of further analysis reflection type optical element 103 and transmission-type structured optical elements 104-A
Number.
Fig. 4 is the optical path distribution map of reflection type optical element 103, and the light at piece 102 is blocked completely by it, therefore sees
No matter the person of examining in any angle would not observe that piece 102.What observer watched is other displays after its reflection
Content on region.In order to guarantee the brightness for the image that observer watches on reflecting element 103 at least in face piece
Unobvious lower than other neighbouring display areas, the maximum value of apex angle Φ should be less than 35 degree, and otherwise observer will be seen that reflection knot
The brightness of image on structure and other display area images near it is significantly different to seriously affect display effect, below will
The calculating process of detailed analysis apex angle.
In the visual characteristic research of human eye, by human eye just can resolution image luminance difference when corresponding minimum it is relatively right
It is known as contrast sensitivity factor C than degree value, can be indicated with formula (1) are as follows:
Wherein P1、P2The brightness of respectively two image-regions, the size and brightness P of the ratio1Related, Fig. 5 gives
P1When taking different value, the change curve of the ratio C.Since the brightness of usual display is 300nit or so, by Fig. 5
It can be seen that C is about 0.02 at this time.Assuming that human eye is P by the brightness of image that reflection type optical element is watched2, watch attached
The brightness of other close display area images is P1, for the image on viewing reflecting element and other viewing areas near it
The brightness of image does not have difference on domain, should meet inequality (2):
Fig. 6 gives the intensity profile of light emission figure an of pixel, and light intensity becomes larger and dies down with emergent ray angle,
Since each pixel on display area emits light at different angles, the smaller light of shooting angle its shine
Intensity is stronger, its luminous intensity of the bigger light of shooting angle is weaker, this may will lead to human eye and watch pixel in wide-angle
Brightness be lower than low-angle observation when brightness.According to this relationship, as shown in figure 4, the light that pixel M is issued is with approximation 0
The angle of emergence of degree enters human eye, and the light that pixel Q is issued is then with biggish output angle θ by reflection type optical element 103
After reflection enter human eye, at this point, due to human eye by the image that reflective optical devices are seen be by near pixel Q region A provide,
And the image near reflective optical devices seen by person is provided by the region B around pixel M, this this may result in human eye and sees
It is lower than the brightness of image of region B to the brightness of image of region A.This can seriously affect final display effect.It is provided due to Fig. 5
The physical quantity of human eye perception is brightness, and what Fig. 6 was provided is the luminous intensity of pixel, therefore in order to further analyze, is provided here
Relational expression between luminous intensity I and light emission luminance P:
In above formula, ds is the face element that shines, and θ is the shooting angle that pixel Q emits beam in Fig. 4.Formula (3) is updated to
The available inequality (4) in inequality (2) and after simplification:
I<0.98cosθ(4)
In conjunction with Fig. 6 pixel light emission intensity it is found that when θ=35 °, I=0.8 (normalized intensity) meets not
Equation (4), therefore when θ < 35 °, human eye would not perceive in Fig. 4 mentioned above the bright of image in region A and region B
Spend difference.
By taking the pixel Q in Fig. 4 as an example, it is assumed that output angle θ=35 °, then in order to guarantee at least human eye face piece when (i.e. extremely
Few 0 degree of visual angle) apparent luminance difference is not watched, then 35 degree of the light that pixel Q is issued is by reflecting element 103
The angle of emergence should be greater than 0 degree after reflection, then can be derived from according to the geometrical relationship in figure, at this time the top of reflective optical devices
Angle Φ < 35 °, the value range that the apex angle of reflective optical devices 103 has thus been calculated should be 0 ° < Φ < 35 °.
Fig. 7 gives the schematic diagram at each visual angle of reflection type optical element 103, and the value range of height is: 0mm <
The value range of L3<50mm, bottom width are: L2>=L1 (width that L1 is piece).The value range of its apex angle is: 0 ° <
Φ < 35 °, table 1 show the optimized angle of apex angle Φ.
The optimized angle of 1 apex angle Φ of table
| 1° | 2° | 3° | 4° | 5° | 6° | 7° | 8° | 9° | 10° |
| 11° | 12° | 13° | 14° | 15° | 16° | 17° | 18° | 19° | 20° |
| 21° | 22° | 23° | 24° | 25° | 26° | 27° | 28° | 29° | 30° |
| 31° | 32° | 33° | 34° |
Work in-process, reflective structure optical element can be made of numerical control CNC or other fine-processing techniques, material
Material can be metallic aluminium (AI), metallic copper (Cu), each metalloid material such as composition metal.UV cure process can also be passed through
Production, material therefor are UV glue, and the refractive index of used UV glue does not limit.Further, it is also possible to hot-forming technique system
Make, material can be plastic resin material (such as PMMA, PC, COC, POLYCARB)；It is also possible to various glass materials (such as
Crown glass, flint glass, dense crown, dense flint glass or LA system glass etc.)；It wants the side of reflection type optical element
Do reflection processing respectively to achieve the effect that light reflection modulation.Wherein, reflection processing can pass through plating reflective foil
There is the material of albedo to realize for mode or attaching, can also be by works such as surface polishings for materials such as metals
Skill achievees the effect that reflection light.
Fig. 8 gives several preferable cases of reflective structure optical element, as can be seen from the figure structure either
Hollow being also possible to is solid, and angle Φ < 35 ° of apex angle or top extended line, optimized angle is as shown in table 1, bottom
Width L2>=L1 (width that L1 is piece), the value range of height is: 0mm<L3<50mm.
It should be noted that several reflective structure optical elements above-mentioned are only some preferences, it is not
Other possible shapes of the structure are limited, as long as in fact, reflection type optical element can cover piece, and make element two
Side achievees the effect that reflection light, and arbitrary shape of the angle of apex angle or the extended line at the top of it less than 35 degree is all in this reality
Within novel protection scope.
Transmission-type prism optical element is made of multiple prism units, there are two the effect of this part-structure is main: (1) with
Catoptric arrangement cooperates the further expansion viewing visual angle in the way of refractive power (to watch and eliminate piece and smooth nothing obviously jointly
The visible angle of luminance difference content)；(2) improve the smooth of picture material and other display area picture materials on catoptric arrangement
Property.
According to the analysis of upper part it is known that when apex angle Φ=35 ° of catoptric arrangement element, what pixel Q was issued
The light S of output angle θ=35 ° angle of emergence (angle with vertical direction) after the reflection of reflection type optical element 103 is 0
Degree；When apex angle Φ=0 ° of catoptric arrangement element, the light S that pixel Q is issued passes through the reflection of reflection type optical element 103
The angle of emergence is 35 degree afterwards, it means that the visible angle for being able to observe that the seamless tiled display content without obvious luminance difference is
0 °~70 ° (both sides are symmetrical).Therefore, in order to further increase the range of this visible angle, should increasing light S outgoing
Angle.In order to reach this purpose, the utility model joined prism array 104-A in the front of reflection type optical element 103, such as
Shown in Fig. 9, pixel Q issue output angle θ=35 ° light S after the reflection of reflection type optical element 103 its angle of emergence compared with
Small (angle with vertical direction), but the angle of emergence of light S is just increased after the refraction action of prism array 104-A, i.e.,
Increase the visible angle for being able to observe that the seamless tiled display content without obvious luminance difference.
In addition, human eye will be immediately seen reflection type optical element if being added without transmission-type prism optical element 104-A
103, this can visually seem very lofty, and the company of the image on reflecting element and the image of its neighbouring display area
Connecing property and flatness are all undesirable, and therefore, transmission-type prism optical element 104-A is added in front of reflecting element 103 can
Improve the flatness of stitching portion area image well.
Figure 10 is the top view of transmission-type prism optical element, wherein S2 is the bore of transmission-type prism optical element,
Range is 50mm > S2 >=L1 (L1 is that piece is wide).
Figure 11 is the details parameter of transmission-type prism optical element structure, and C1 is the depth of each sawtooth, and range is
10mm>C1>0.C2 is the width of each sawtooth, and range is 10mm > C2 > 0.Three angle ε 1, ε 2, the correlation between ε 3 are
ε 1+ ε 2+ ε 3=180 °.Work in-process, transmission-type prism optical element can be made by UV cure process, material therefor
Refractive index for UV glue, used UV glue does not limit.Further, it is also possible to make of hot-forming technique, material can be with
It is plastic resin material (such as PMMA, PC, COC, POLYCARB etc.)；It is also possible to various glass materials (such as crown glass, flint
Glass, dense crown, dense flint glass or LA system glass etc.)；It can also be made of traditional cold machining process, material
It can be plastic resin material (such as PMMA, PC, COC, POLYCARB etc.)；Be also possible to various glass materials (such as crown glass,
Flint glass, dense crown, dense flint glass or LA system glass etc.)；Various optical films can be plated on surface (such as anti-reflection to subtract
Anti- film) come the optical property for part of changing the title of a reign.
The transmission-type prism optical element 104-A referred in the utility model can be list there are many version
Layer structure is also possible to the composite construction of multilayer, as shown in figure 12.
Wherein, S2 is the bore of transmission-type prism optical element, and range is S2 >=L1 (L1 is that piece is wide above).Adding
In work, transmission-type prism optical element can be made by UV cure process, and material therefor is UV glue, used UV glue
Refractive index does not limit.Further, it is also possible to make of hot-forming technique, material can be plastic resin material (such as
PMMA, PC, COC, POLYCARB etc.)；It is also possible to various glass materials (such as crown glass, flint glass, dense crown, weight
Flint glass or LA system glass etc.)；It can also be made of traditional cold machining process, material can be plastic resin material
Expect (such as PMMA, PC, COC, POLYCARB etc.)；It is also possible to various glass materials (such as crown glass, flint glass, weight crown glass
Glass, dense flint glass or LA system glass etc.)；Various optical films (such as anti-reflection antireflective film) can be plated come part of changing the title of a reign on surface
Optical property.
It should be noted that Figure 12 has been merely given as the preference of several transmission-type prism optical element 104-A, it is not
It is limited, the improvement that any people from this field does not make the creative labor belongs to the model that the utility model patent is protected
It encloses.
Major function, the parameter of two opticators of optical texture in above each section Main Analysis the utility model
Range and various possible deformations.The optical texture of the utility model is common by reflection type optical element and transmissive optical element
Composition, wherein reflection type optical element and transmissive optical element can be above-mentioned various modifications, Figure 13 (a)~Figure 13
(f) several combining forms of optical texture in the utility model are given, but are not to be limited, actually this is practical
Novel optical texture can a variety of transmission-type prismatic lights as shown in a variety of reflective optical devices shown in fig. 8 and Figure 12
It learns element be freely combined, the improvement that any people from this field does not make the creative labor belongs to the utility model patent
The range protected.
It is last it should be noted is that: can also carry out stretching by the image to piece two sides or compression processing come
Cooperate the utility model proposes optical texture realize seamless smooth display.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, is directly or indirectly transported
Used in other related technical areas, it is also included in the patent protection scope of the utility model.
For those of ordinary skill in the art, without departing from the concept of the premise utility, it can also do
Several simple deduction or replace out, all shall be regarded as belonging to the protection scope of the utility model.
Claims (9)
1. a kind of optical system for realizing multi-screen seamless tiled display, it is characterised in that: the system comprises reflective structures
Optical element and transmission-type prism optical element；Wherein, the reflective structure optical element is covered in multi-screen and is spliced to form
Piece before, the apex angle of the reflective structure optical element or the angle of top extended line are less than 35 °；The transmission-type
Prism optical element is made of multiple groups prism, and the transmission-type prism optical element is set to the reflective knot with screen in parallel
The surface of structure optical element.
2. optical system according to claim 1, it is characterised in that: the section of the reflective structure optical element is three
Angular, polygon is arc-shaped, and the surface of the reflective structure optical element has all carried out reflection processing.
3. optical system according to claim 2, it is characterised in that: the surface of the reflective structure optical element it is anti-
Penetrate processing refer to its surface plate reflective foil or by surface polishing or attach have albedo material come
The technique for realizing reflection light effect.
4. optical system according to claim 1, it is characterised in that: the bottom width of the reflective structure optical element
L2 is more than or equal to the width L1 of piece, and the value range of height L3 is: 0~50mm.
5. optical system according to claim 1, it is characterised in that: the width S 2 of the transmission-type prism optical element is big
In the width L1 for being equal to piece.
6. optical system according to claim 1, it is characterised in that；The transmission-type prism optical element and piece away from
Value range from L5 is: 0~50mm.
7. optical system according to claim 1, it is characterised in that: the transmission-type prism optical element is compound by N layers
The prism array of type forms, and N is more than or equal to 1.
8. optical system according to claim 1, it is characterised in that: the reflective structure optical element and transmission-type rib
The value range of the distance between mirror optical element L4 is: 0~50mm.
9. optical system according to claim 1, it is characterised in that: the transmission-type prism optical element is solidified by UV
Moulding process production, material therefor are UV glue；Alternatively, the transmission-type prism optical element uses hot-forming technique system
Make, material is plastic resin material or glass material；Alternatively, the transmission-type prism optical element using traditional cold plus
The production of work technique, material is plastic resin material or glass material.
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| CN201821615019.7U CN209118668U (en) | 2018-09-30 | 2018-09-30 | A kind of optical system for realizing multi-screen seamless tiled display |
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| CN201821615019.7U CN209118668U (en) | 2018-09-30 | 2018-09-30 | A kind of optical system for realizing multi-screen seamless tiled display |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036152A (en) * | 2018-09-30 | 2018-12-18 | 深圳市眸合科技有限公司 | A kind of optical system for realizing multi-screen seamless tiled display |
| CN112946914A (en) * | 2021-02-23 | 2021-06-11 | 荆门市探梦科技有限公司 | Transmission type geometric holographic screen with field angle and application thereof |
| CN114627749A (en) * | 2022-03-16 | 2022-06-14 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
-
2018
- 2018-09-30 CN CN201821615019.7U patent/CN209118668U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036152A (en) * | 2018-09-30 | 2018-12-18 | 深圳市眸合科技有限公司 | A kind of optical system for realizing multi-screen seamless tiled display |
| CN112946914A (en) * | 2021-02-23 | 2021-06-11 | 荆门市探梦科技有限公司 | Transmission type geometric holographic screen with field angle and application thereof |
| CN112946914B (en) * | 2021-02-23 | 2024-04-02 | 荆门市探梦科技有限公司 | Transmission type geometric holographic screen with opening angle and its application |
| CN114627749A (en) * | 2022-03-16 | 2022-06-14 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| US11841524B2 (en) | 2022-03-16 | 2023-12-12 | Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Backlight module and display device |
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