CN101373234A - Backlight module and optical film thereof - Google Patents

Backlight module and optical film thereof Download PDF

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Publication number
CN101373234A
CN101373234A CNA2007101423906A CN200710142390A CN101373234A CN 101373234 A CN101373234 A CN 101373234A CN A2007101423906 A CNA2007101423906 A CN A2007101423906A CN 200710142390 A CN200710142390 A CN 200710142390A CN 101373234 A CN101373234 A CN 101373234A
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CN
China
Prior art keywords
blooming
limit
pyrometric cone
light
cone rod
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Pending
Application number
CNA2007101423906A
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Chinese (zh)
Inventor
王宏洲
高旗宏
陈煌坤
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Delta Electronics Inc
Delta Optoelectronics Inc
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Delta Optoelectronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Delta Optoelectronics Inc filed Critical Delta Optoelectronics Inc
Priority to CNA2007101423906A priority Critical patent/CN101373234A/en
Publication of CN101373234A publication Critical patent/CN101373234A/en
Pending legal-status Critical Current

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Abstract

An optical film comprises a substrate and at least a similarly triangular pyramid shaped structure. The similarly triangular pyramid shaped structure is arranged on one side of the substrate and provided with a base, a first surface, a second surface and a third surface, wherein the first surface, the second surface and the third surface are connected with each other and arranged along the base.

Description

Backlight module and blooming thereof
Technical field
The present invention is about a kind of backlight module and blooming thereof, especially in regard to a kind of backlight module and blooming thereof that strengthens biaxially oriented brightness that reach.
Background technology
Along with the arriving of digital Age, the technology of flat display apparatus is also grown up fast, has become one of indispensable electronic product, so popular also more and more higher for the technology and the functional requirement of flat display apparatus.
With regard to flat display apparatus, it mainly comprises a two-d display panel and a backlight module.Wherein two-d display panel mainly has colored optical filtering substrates, thin film transistor base plate and is located in the liquid crystal layer between two substrates; And backlight module uses as backlight, it can be evenly distributed in the light from a light source surface of liquid crystal panel, traditionally, be the light source that is used as backlight module with cold-cathode fluorescence lamp (CCFL), and make backlight module be divided into straight-down negative and side light type back light module according to the set-up mode of light source.Recently in order to promote the brightness vision effect of flat display apparatus, light is contracted in positive and negative 30 to 40 degree, so for the brightness enhancement film function that promotes backlight module, become one of indispensable technology of backlight module at the emission angle by brightness enhancement film.
Please refer to shown in Figure 1ly, a kind of traditional backlight module 1 comprises a light source 11, at least one diffusion barrier 14 and a brightness enhancement film (brightness enhancement film) 12.If backlight module 1 is a side light type back light module, then diffusion barrier 14 and brightness enhancement film 12 are arranged on the light guide plate 13 in regular turn.Light source 11 is launched a light L1, and is arranged at a side of light guide plate 13.Light L1 via behind the diffusion barrier 14, enters brightness enhancement film 12, as shown in Figure 1 by light guide plate 13 guiding again.If backlight module 1B is a bottom-lighting type back light module, then diffusion barrier 14 and brightness enhancement film 12 are arranged on the light source 11 in regular turn.The light L1 of light source 11 directly enters diffusion barrier 14, enters brightness enhancement film 12 again, as shown in Figure 2.
With regard to brightness enhancement film 12, the light L1 that injects can be reflected into low-angle emergent light, the emission angle of most light L1 can be contracted in positive and negative 30 to 40 degree, so that the audience has stronger brightness vision effect at positive and negative 30 to 40 degree of optical axis with interior.Referring again to shown in Figure 1, described according to United States Patent (USP) 6091547, its proposition has prismatic surface structure 121, and the prismatic surface structure 121 of this brightness enhancement film 12 is to be arranged in parallel with single direction V1.Yet, use aforesaid way only can provide the single shaft direction, for example the brightening effect of horizontal direction or vertical direction.If so desire to reach biaxially oriented, it is the brightening effect of horizontal direction and vertical direction, then need adopt two brightness enhancement film 12 to coincide mutually, and the prismatic surface structure 121 of two brightness enhancement film 12 is arranged in parallel with first direction V2 and second direction V3 respectively, and first direction V2 and second direction V3 mutually vertical (as shown in Figure 2).
Yet, use two brightness enhancement film 12 not only can increase cost, more can reduce penetrance.
Therefore, how to provide a kind of and can reach the brightening effect of biaxially oriented simultaneously, and reduce cost and promote the backlight module and the blooming thereof of penetrance, become one of important topic.
Summary of the invention
Because above-mentioned problem, purpose of the present invention can reach the brightening effect of biaxially oriented simultaneously for providing a kind of, and reduces cost and promote the backlight module and the blooming thereof of penetrance.
So,, comprise a substrate and at least one class pyrometric cone rod structure according to a kind of blooming of the present invention for reaching above-mentioned purpose.Class pyrometric cone rod structure is arranged on the one side of substrate, these class pyrometric cone rod structures have a pedestal, one first, one second and one the 3rd, first, second and the 3rd face interconnect along the pedestal setting, and first, second and the 3rd 's one side at least wherein forms an angle with pedestal, and angle is less than 90 degree.
For reaching above-mentioned purpose, comprise a light source and a blooming according to a kind of backlight module of the present invention.Light emitted one light, and blooming is arranged on the light path of light, and have a substrate and an at least one class pyrometric cone rod structure, such pyrometric cone rod structure is arranged on the one side of substrate, these class pyrometric cone rod structures have a pedestal, one first, one second and one the 3rd, first, second and the 3rd face interconnect along the pedestal setting, and first, second and the 3rd 's one side at least wherein forms an angle with pedestal, and angle is less than 90 degree.
From the above, backlight module of the present invention and blooming thereof are to be arranged on the light path of the light that light source launches by blooming, and be arranged on the pedestal by all kinds of pyrometric cone rod structures of blooming, and interconnective first, second of all kinds of pyrometric cone rod structures and the 3rd 's one side at least wherein and pedestal form the angles less than 90 degree.Compare with conventional art, the present invention only uses the monolithic optical film, and it has the class pyrometric cone rod structure that is arranged on the substrate.This kind mode, not only can reduce cost, and more can match, just can make light the time by class pyrometric cone rod structure by first, second of class pyrometric cone rod structure and the 3rd face, reach the effect that biaxially oriented brightness strengthens, and then avoid the reduction of light transmittance.
Description of drawings
Fig. 1 is a kind of synoptic diagram of traditional backlight module;
Fig. 2 is the synoptic diagram of another traditional backlight module;
Fig. 3 is the synoptic diagram according to a kind of backlight module of first embodiment of the invention;
Fig. 4 is the schematic perspective view according to first embodiment of the invention;
Fig. 5 A to Fig. 5 B is the schematic perspective view of a class pyrometric cone rod structure wherein of displayed map 4;
Fig. 6 A to Fig. 6 C arranges the schematic top plan view of aspect according to the difference of the blooming of first embodiment of the invention for demonstration;
Fig. 7 A be Fig. 6 A along AA line diagrammatic cross-section;
Fig. 7 B be Fig. 6 B along BB line diagrammatic cross-section;
Fig. 8 A is the diagrammatic cross-section of another kind of blooming;
Fig. 8 B is again the diagrammatic cross-section of another kind of blooming;
Fig. 9 A and Fig. 9 B are respectively the synoptic diagram of the blooming of the present invention second and the 3rd embodiment;
Figure 10 shows the optical axis angle of blooming of first embodiment of the invention and the graph of a relation of brightness; And
Figure 11 shows the synoptic diagram of the backlight module of second embodiment of the invention.
The component symbol explanation:
1,2,3: backlight module 11,21,31: light source
12: brightness enhancement film 121: the prismatic surface structure
13,24: light guide plate 14: diffusion barrier
22,22A, 22B, 22C, 32: blooming
221: substrate
222,223: class pyrometric cone rod structure 224: optical diffusion
23,34: the second diffusion sheets of 33: the first diffusion sheets
B01: pedestal D, d: spacing distance
L1, L2, L3: light S01: first
S02: second S03: the 3rd
S04: fourth face S11: first limit
S12: the second limit S13: the 3rd limit
V01: direction V02, V11: first direction
V03, V12: second direction V13: third direction
θ: angle
Embodiment
Hereinafter with reference to relevant drawings, a kind of backlight module and blooming thereof according to the preferred embodiment of the present invention are described.
Please refer to shown in Figure 3ly, the backlight module 2 of first embodiment of the invention comprises a light source 21, a blooming 22, one first diffusion sheet 23 and a light guide plate 24.The backlight module 2 of present embodiment can be a bottom-lighting type back light module or a side light type back light module on the implementation, is to be that side light type back light module is an example with backlight module 2 at this.
In the present embodiment, first diffusion sheet 23 is arranged on a side of blooming 22, and light guide plate 24 is arranged on the opposite side of blooming 22.Light source 21 is adjacent to light guide plate 24, and light source 21 emissions one light L2 directive light guide plate 24, and light L2 sees through light guide plate 24 directive bloomings 22.
Please more simultaneously with reference to shown in Fig. 4 to Fig. 5 B, it is the schematic perspective view of blooming 22, and in the present embodiment, blooming 22 has a substrate 221 and at least one class pyrometric cone rod structure 222.The material of this blooming 22 can be a polyethylene terephthalate (polyethylene terephthalate, PET), (polycarbonate PC) or a polymethylmethacrylate (PMMA), more can be a light-transmitting materials to a polycarbonate certainly.
And all kinds of pyrometric cone rod structures 222 are arranged on the one side of substrate 221, and have a pedestal B01, one first S01, one second S02 and one the 3rd S03.This pedestal B01 has interconnective one first limit S11, one second limit S12 and one the 3rd limit S13 (shown in Fig. 5 A and Fig. 5 B), and first S01, second S02 and the 3rd S03 are provided with along the first limit S11, the second limit S12 and the 3rd limit S13 of pedestal B01 respectively.
Be exactly that first S01, second S02 and the 3rd S03 are connected with the first limit S11, the second limit S12 and the 3rd limit S13 respectively.And one of them face of first S01, second S02 and the 3rd S03 and pedestal B01 form an angle theta, and this angle theta is less than 90 degree, for example first S01, second S02 and the 3rd S03 all form the angle theta of spending less than 90 (shown in Fig. 4 and Fig. 5 A) with pedestal B01, or the 3rd S03 and pedestal B01 form the angle theta less than 90 degree, and first S01 and second S02 then form the angle theta (shown in Fig. 5 B) of 90 degree with pedestal B01.
In the present embodiment, the shape of pedestal B01 is a triangle on the implementation, and the length of the first limit S11 of pedestal B01, the second limit S12 and the 3rd limit S13 is about 10 μ m to 100 μ m, and the length of the first limit S11, the second limit S12 and the 3rd limit S13 is substantially all identical, and for example pedestal B01 is an equilateral triangle; Perhaps, the first limit S11, the second limit S12 and the 3rd limit S13 are substantially all inequality.Certainly, two the length that the first limit S11 of pedestal B01, the second limit S12 and the 3rd limit S13 more can be wherein is substantially identical, and for example pedestal B01 is an equilateral triangle.In addition, the shape of first of class pyrometric cone rod structure 222 S01, second S02 and the 3rd S03 is respectively a class triangle, right-angle triangle or equilateral triangle.The awl post height h of such pyrometric cone rod structure 222 is identical or inequality with the length of the first limit S11, the second limit S12 and the 3rd limit S13.
In addition; shown in Fig. 5 B; the class pyrometric cone rod structure 223 of present embodiment also has a fourth face S04; be connected with first S01, second S02 and the 3rd S03 with respect to pedestal B01; and fourth face S04 is a plane, an inclined-plane or an arc surface on the implementation; at this is to be that the plane is an example with fourth face S04, and fourth face S04 is in order to protection and the element on blooming 22 of preventing to coincide, and for example two-d display panel (not shown) etc. is subjected to scratch.
Please refer to shown in Fig. 6 A to Fig. 6 C, it is the schematic top plan view of blooming 22A, 22B, 22C.The arrangement of class pyrometric cone rod structure 222 is also unrestricted, on the implementation respectively with one regularly arranged (shown in Fig. 6 A and Fig. 6 B) or with irregular alignment, i.e. and random alignment (shown in Fig. 6 C).When class pyrometric cone rod structure 222 when regularly arranged, following arrangement mode is then arranged, a kind of is that the class pyrometric cone rod structure 222 of blooming 22A can be along a first direction V11 and the interlaced arrangement of a second direction V12; Another kind is along the interlaced arrangement of a third direction V13 for the class pyrometric cone rod structure 222 of blooming 22B.Certainly, class pyrometric cone rod structure 222 more can have a spacing distance d, D mutually and arrange (shown in Fig. 6 A and Fig. 6 B), also can interconnect the arrangement (not shown).
In addition, please refer to shown in Fig. 7 A to Fig. 8 B, it is respectively the blooming 22A of Fig. 6 A and 6B figure, the cut-open view of 22B, and the set-up mode of all kinds of pyrometric cone rod structures 222 is also unrestricted, can be convexly equipped with (shown in Fig. 7 A and Fig. 7 B) or be arranged with (shown in Fig. 8 A and Fig. 8 B) in the face of substrate 221.
Substrate 221 and all kinds of pyrometric cone rod structure 222 can be formed in one on the implementation or be adhesion-molded.At this is to be formed in one with substrate 221 and all kinds of pyrometric cone rod structure 222 to be example, and the production method of class pyrometric cone rod structure 222 is also unrestricted, can use the modes such as class gold-tinted, electroforming, model processing procedure or precise and tiny processing procedure in soft pressure, hot pressing, hot roll extrusion, ultraviolet light polymerization, the micro-electromechanical technology to be formed on the substrate 221.
In addition; please refer to shown in Fig. 9 A and Fig. 9 B; blooming 22 also has an optical diffusion 224; be arranged on the another side of substrate 221 with respect to class pyrometric cone rod structure 222; and the material of optical diffusion 224 comprises light-transmissive resin and particle mixture (shown in Fig. 9 A) on the implementation, more can be the light-transmitting materials (shown in Fig. 9 B) of a tool surface micro-structure certainly.In the present embodiment, class pyrometric cone rod structure 222 set those faces at substrate 221 are exiting surface on the implementation, and the other one side of substrate 221 those faces then is an incidence surface relatively.
Please refer to shown in Figure 10, when above-mentioned blooming 22 of light incident and pyrometric cone rod structure 222 thereof, light refraction becomes low-angle and penetrates, via learning from the visual angle of A direction and B direction and the relation of luminance gain after the simulation softward calculating, its as a result display view angle in positive and negative 30~40 the degree in, the yield value of its briliancy is greater than 1, so can greatly promote the brightness of light.
The backlight module 2 of present embodiment does not only need by monolithic optical film 22, first S01 of its class pyrometric cone rod structure 222, second S02 and the 3rd S03 match, just can make light L2 by class pyrometric cone rod structure 222 time, reach biaxially oriented, be the effect that the brightness of vertical direction and horizontal direction strengthens, more can reduce cost and avoid the reduction of light transmittance.
Please refer to shown in Figure 11ly, the backlight module 3 of second embodiment of the invention comprises a light source 31, a blooming 32 and one first diffusion sheet 33.This light source 31, blooming 32 and first diffusion sheet 33 have identical formation and effect with light source 21, blooming 22 and first diffusion sheet 23 of above-mentioned first embodiment (as shown in Figure 3), so do not repeat them here.Backlight module 2 (as shown in Figure 3) difference of the backlight module 3 of present embodiment and first embodiment is that the former backlight module 3 also comprises one second diffusion sheet 34.
In addition, first diffusion sheet 33 is arranged on a side of blooming 32, and second diffusion sheet 34 is arranged on the opposite side of blooming 32, and light emitted one light, and relatively blooming is arranged at a side of second diffusion sheet 34, so the backlight module 3 of present embodiment is a bottom-lighting type back light module.
In sum, backlight module of the present invention and blooming thereof are that blooming is arranged on the light path of the light that light source launches, and be arranged on the pedestal by all kinds of pyrometric cone rod structures of blooming, and interconnective first, second of all kinds of pyrometric cone rod structures and the 3rd 's one side at least wherein and pedestal form the angles less than 90 degree.Compare with conventional art, the present invention only uses the monolithic optical film, and it has the class pyrometric cone rod structure that is arranged on the substrate.This kind mode not only can reduce cost, and more can match by first, second of class pyrometric cone rod structure and the 3rd face, just can make light the time, reach the effect that biaxially oriented brightness strengthens, and then avoid the reduction of light transmittance by class pyrometric cone rod structure.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should comprise in the present invention its equivalent modifications of carrying out or change.

Claims (23)

1. blooming comprises:
One substrate; And
At least one class pyrometric cone rod structure is arranged on the one side of this substrate, and such pyrometric cone rod structure has a pedestal, one first, one second and one the 3rd, and this first, this second and the 3rd face interconnect along this pedestal setting.
2. blooming according to claim 1, wherein this pedestal be shaped as a triangle or equilateral triangle, and this first, this second and the 3rd 's shape is respectively a class triangle.
3. blooming according to claim 1, wherein this pedestal has interconnective one first limit, one second limit and one the 3rd limit, and this first, this second and the 3rd along this first limit, this second limit and the 3rd limit be provided with.
4. blooming according to claim 3, wherein the length on this first limit, this second limit and the 3rd limit is substantially identical or different, and perhaps two the length wherein on this first limit, this second limit and the 3rd limit is substantially identical.
5. blooming according to claim 3, wherein the length on this first limit, this second limit and the 3rd limit is about 10 μ m to 100 μ m.
6. blooming according to claim 3, wherein the awl post height of such pyrometric cone rod structure is identical or inequality with the length on this first limit, this second limit and the 3rd limit.
7. blooming according to claim 1, wherein these class pyrometric cone rod structures have spacing distance arrangement mutually or interconnect arrangement, the perhaps interlaced arrangement of these class pyrometric cone rod structures.
8. blooming according to claim 1, wherein such pyrometric cone rod structure also has a fourth face, and this pedestal is connected with this first, this second and the 3rd face relatively.
9. blooming according to claim 8, wherein this fourth face is a plane, an inclined-plane or an arc surface.
10. blooming according to claim 1, wherein this substrate and such pyrometric cone rod structure are formed in one or are adhesion-molded.
11. blooming according to claim 1, wherein the material of this blooming is a polyethylene terephthalate, a polycarbonate, a polymethylmethacrylate or is a light-transmitting materials.
12. blooming according to claim 1, wherein such pyrometric cone rod structure is with soft pressure, hot pressing, hot roll extrusion, ultraviolet light polymerization, class gold-tinted, electroforming, model or the moulding of precise and tiny processing procedure mode.
13. blooming according to claim 1, it also comprises an optical diffusion, is arranged on the another side of this substrate, and wherein this another side of this substrate is an incidence surface.
14. blooming according to claim 13, wherein the material of this optical diffusion comprises light-transmissive resin and particle mixture, perhaps is a light-transmitting materials.
15. blooming according to claim 13, wherein this optical diffusion has a surface micro-structure.
16. blooming according to claim 1, wherein these class pyrometric cone rod structures are regularly arranged, irregular or random alignment.
17. blooming according to claim 1, wherein this first, this second and the 3rd 's one side at least wherein and this pedestal form the angles less than 90 degree, and perhaps this first, this second and the 3rd 's two sides at least wherein forms one 90 angles of spending with this pedestal.
18. blooming according to claim 1, wherein first of such pyrometric cone rod structure, second and the 3rd 's wherein one side is shaped as a right angle triangle or an equilateral triangle.
19. blooming according to claim 1, wherein such pyrometric cone rod structure is for being convexly equipped with or being arranged with on this substrate.
20. a backlight module comprises:
One light source is launched a light; And
One blooming, be arranged on the light path of this light, and have a substrate and an at least one class pyrometric cone rod structure, such pyrometric cone rod structure is arranged on the one side of this substrate, such pyrometric cone rod structure has a pedestal, one first, one second and one the 3rd, and this first, this second and the 3rd face interconnect along this pedestal setting.
21. backlight module according to claim 20, it also comprises one first diffusion sheet, is arranged on a side of this blooming.
22. backlight module according to claim 21, it also comprises a light guide plate, and this first diffusion sheet is arranged at the opposite side of this blooming relatively, and is arranged at a side of this light source, and this light sees through this this blooming of light guide plate directive.
23. backlight module according to claim 21, it also comprises one second diffusion sheet, and this first diffusion sheet is arranged at the opposite side of this blooming relatively, and relative this blooming of this light source is arranged at a side of this second diffusion sheet.
CNA2007101423906A 2007-08-22 2007-08-22 Backlight module and optical film thereof Pending CN101373234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007101423906A CN101373234A (en) 2007-08-22 2007-08-22 Backlight module and optical film thereof

Publications (1)

Publication Number Publication Date
CN101373234A true CN101373234A (en) 2009-02-25

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102455459A (en) * 2010-10-26 2012-05-16 中央大学 Optical film plate capable of adjusting light source
CN102508330A (en) * 2011-10-19 2012-06-20 深圳安嵘光电产品有限公司 Dislocation light guide plate, manufacturing method thereof and illuminating lamp
CN102854553A (en) * 2011-06-29 2013-01-02 财团法人工业技术研究院 Multiple reflection structure and photoelectric element
CN104460108A (en) * 2013-09-22 2015-03-25 纬创资通股份有限公司 Backlight module
CN110579831A (en) * 2018-06-08 2019-12-17 芝奇国际实业股份有限公司 Light guide element
CN110579834A (en) * 2018-06-08 2019-12-17 芝奇国际实业股份有限公司 Light guide assembly and electronic device with same
CN113671750A (en) * 2021-02-09 2021-11-19 旸旭光电股份有限公司 Backlight module of optical film with inclined structure
WO2023141892A1 (en) * 2022-01-27 2023-08-03 京东方科技集团股份有限公司 Display panel and display apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102455459B (en) * 2010-10-26 2013-03-27 中央大学 Optical film plate capable of adjusting light source
CN102455459A (en) * 2010-10-26 2012-05-16 中央大学 Optical film plate capable of adjusting light source
CN102854553B (en) * 2011-06-29 2015-10-28 财团法人工业技术研究院 Multiple reflection structure and photoelectric element
CN102854553A (en) * 2011-06-29 2013-01-02 财团法人工业技术研究院 Multiple reflection structure and photoelectric element
US8919974B2 (en) 2011-06-29 2014-12-30 Industrial Technology Research Institute Multi-reflection structure and photo-electric device
CN102508330A (en) * 2011-10-19 2012-06-20 深圳安嵘光电产品有限公司 Dislocation light guide plate, manufacturing method thereof and illuminating lamp
CN102508330B (en) * 2011-10-19 2014-04-16 深圳安嵘光电产品有限公司 Dislocation light guide plate, manufacturing method thereof and illuminating lamp
CN104460108A (en) * 2013-09-22 2015-03-25 纬创资通股份有限公司 Backlight module
CN104460108B (en) * 2013-09-22 2017-03-08 纬创资通股份有限公司 Backlight module
CN110579831A (en) * 2018-06-08 2019-12-17 芝奇国际实业股份有限公司 Light guide element
CN110579834A (en) * 2018-06-08 2019-12-17 芝奇国际实业股份有限公司 Light guide assembly and electronic device with same
CN113671750A (en) * 2021-02-09 2021-11-19 旸旭光电股份有限公司 Backlight module of optical film with inclined structure
WO2023141892A1 (en) * 2022-01-27 2023-08-03 京东方科技集团股份有限公司 Display panel and display apparatus

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