Light guide film, light guide plate, backlight module and display device
By setting strip and dot-shaped structures on the bottom surface of the light guide film and the light guide plate, and adjusting their distribution density and size, the color difference problem generated by the light source in the backlight module is solved, and the uniformity and harmony of the light color are achieved.
Patent Information
- Application Number
- CN201910243507.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-03-28
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2039-03-28
AI Technical Summary
In the existing backlight module, after the light generated by the light source enters the light guide plate, the light of shorter wavelengths is easily absorbed, resulting in chromatic aberration on the outward surface, which is blue at the front end and yellow at the back end.
A light guide film and light guide plate are designed, and a plurality of strip structures and dot structures are provided on the bottom surface. The strip structure is located in the first reflecting area and the dot structure is located in the second reflecting area. By adjusting the distribution density and size of the structure, Control the yellow light with a larger reflection angle to partially emit light first, slow down the blueization of the light-out surface, and reduce the degree of light-out output of the yellow light far away from the incoming surface, so as to achieve the effect of balancing the light-out color.
Through this structural design, the blueization phenomenon of the light-out surface near the light-incoming surface is slowed down, and the degree of light-out output of the yellow light far away from the light-incoming surface is reduced, and the color difference is significantly reduced, so as to achieve uniformity and harmony of the light-out color.
Smart Images
Figure CN111751921B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a light guide element and application thereof, and in particular to a light guide film, a light guide plate, a backlight module and a display device. Background Art
[0002] A general backlight module mainly includes a light source and a light guide plate, and the light generated by the light source directly enters the light guide plate. However, when the light generated by the light source enters the light guide plate, the shorter wavelength light (such as blue light) is easily absorbed by the light guide plate. Moreover, as the distance the light propagates in the light guide plate increases, the amount of shorter wavelength light in the light emitted from the light exit surface of the light guide plate becomes less and less, which will cause the light exit surface of the light guide plate to have longer wavelength light (such as yellow light) left at the part farther away from the light source, resulting in a color difference phenomenon of blue at the front end and yellow at the back end. Summary of the invention
[0003] Therefore, an object of the present invention is to provide a light-guiding film that can improve the color difference problem.
[0004] The light-guiding film of the present invention comprises a substrate and a microstructure layer formed on the substrate. The substrate comprises a light incident surface, a light emitting surface adjacent to the light incident surface, and a bottom surface adjacent to the light incident surface and spaced apart from the light emitting surface, wherein the bottom surface comprises a first reflection area adjacent to the light incident surface, and a second reflection area outside the first reflection area. The microstructure layer is disposed on the bottom surface and comprises a plurality of strip structures and a plurality of dot structures, wherein the strip structure is at least located in the first reflection area, and the extension direction of the strip structure is parallel to the light incident surface, and the dot structure is located in the second reflection area.
[0005] Another technical means of the present invention is that a portion of the strip structure is disposed in a region of the second reflection region adjacent to the first reflection region.
[0006] Another technical means of the present invention is that the distribution area of the strip structure is adjacent to the light incident surface and the area of the distribution area occupies less than 50% of the area of the bottom surface.
[0007] Another technical means of the present invention is that the dot-shaped structures are distributed more sparsely near the light incident surface and more densely away from the light incident surface.
[0008] Another technical means of the present invention is that the size of the dot-shaped structure is smaller near the light incident surface, and is larger away from the light incident surface.
[0009] Another technical means of the present invention is that there is a spacing between adjacent strip structures, and the spacing increases as the distance between the strip structure and the light incident surface increases.
[0010] Another object of the present invention is to provide a backlight module, comprising the aforementioned light guide film and a light source, wherein the light source emits light toward the light incident surface of the substrate.
[0011] Another technical means of the present invention is that the backlight module further includes an optical film group arranged on the light guide film.
[0012] Another object of the present invention is to provide a display device, comprising the aforementioned backlight module and a display panel disposed on the backlight module.
[0013] Another technical means of the present invention is that the display panel has a visible area and a non-visible area, the non-visible area is located outside the visible area, and the first reflective area of the substrate is located within the projection range of the non-visible area.
[0014] Another object of the present invention is to provide a light guide plate that can improve the color difference problem.
[0015] The light guide plate includes a substrate, a plurality of strip structures and a plurality of dot structures. The substrate has a light incident surface, a light emitting surface adjacent to the light incident surface, and a bottom surface adjacent to the light incident surface and spaced from the light emitting surface. The bottom surface has a first reflection area adjacent to the light incident surface, and a second reflection area outside the first reflection area. The strip structure and the dot structure are formed on the bottom surface of the substrate, wherein the strip structure is at least located in the first reflection area, and the extension direction of the strip structure is parallel to the light incident surface, and the dot structure is located in the second reflection area.
[0016] Another technical means of the present invention is that a portion of the strip structure is disposed in a region of the second reflection region adjacent to the first reflection region.
[0017] Another technical means of the present invention is that the distribution area of the strip structure is adjacent to the light incident surface and the area of the distribution area occupies less than 50% of the area of the bottom surface.
[0018] Another technical means of the present invention is that the dot-shaped structures are distributed more sparsely near the light incident surface and more densely away from the light incident surface.
[0019] Another technical means of the present invention is that the size of the dot-shaped structure is smaller near the light incident surface, and is larger away from the light incident surface.
[0020] Another technical means of the present invention is that there is a spacing between adjacent strip structures, and the spacing increases as the distance between the strip structure and the light incident surface increases.
[0021] Another object of the present invention is to provide a backlight module, comprising the aforementioned light guide plate and a light source, wherein the light source emits light toward the light incident surface of the substrate.
[0022] Another technical means of the present invention is that the backlight module further includes an optical film group arranged on the light guide film.
[0023] Another object of the present invention is to provide a display device, comprising the aforementioned backlight module and a display panel disposed on the backlight module.
[0024] Another technical means of the present invention is that the display panel has a visible area and a non-visible area, the non-visible area is located at the periphery of the visible area, and the first reflective area is located within the projection range of the non-visible area.
[0025] The beneficial effect of the present invention is that, through the structural design of the light guide film and the light guide plate, the yellow light with a larger reflection angle is partially emitted first, so as to slow down the blueing phenomenon of the light emitting surface near the light incident surface, and also reduce the yellow light emission level of the light emitting surface away from the light incident surface, so as to achieve a balance and harmony of the overall light emission color, and solve the problem of color difference produced by the backlight module and the display device. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic diagram illustrating a first preferred embodiment of a backlight module of the present invention;
[0027] Figure 2 Another way to explain Figure 1 Schematic diagram of
[0028] Figure 3 is a curve diagram illustrating the percentage of the distance of the stripe structure and the dot structure on the light guide film relative to the light incident surface to the overall length of the light guide plate and the structure density;
[0029] Figure 4 is a schematic diagram illustrating a second preferred embodiment of the backlight module of the present invention;
[0030] Figure 5 is a schematic diagram illustrating different aspects of the dot-like structure in the second preferred embodiment;
[0031] Figure 6 is a schematic diagram illustrating a third preferred embodiment of the backlight module of the present invention;
[0032] Figure 7 is a schematic diagram illustrating a fourth preferred embodiment of the backlight module of the present invention;
[0033] Figure 8 is a schematic diagram illustrating a fifth preferred embodiment of the backlight module of the present invention; and
[0034] Fig. 9 Schematic diagram of a preferred embodiment of the display device of the present invention. DETAILED DESCRIPTION
[0035] The relevant technical contents of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the accompanying drawings. Before the detailed description, it should be noted that similar elements are represented by the same numbers.
[0036] See also Figure 1 , which is a preferred embodiment of the backlight module 100 of the present invention, comprises a light guide film 120 and a light source 180. The light source 180 is mainly used to provide light to the light guide film 120. The light guide film 120 can refract and reflect the light provided by the light source 180, and improve the optical brightness of the backlight module 100, and can make the light color of the backlight module 100 uniform.
[0037] The light guide film 120 includes a substrate 140 and a microstructure layer 160 formed on the substrate 140. The substrate 140 has a light incident surface 141, a light emitting surface 142 adjacent to the light incident surface 141, and a bottom surface 143 adjacent to the light incident surface 141 and spaced from the light emitting surface 142. The bottom surface 143 has a first reflection area 144 adjacent to the light incident surface 141, and a second reflection area 145 outside the first reflection area 144. The microstructure layer 160 is disposed on the bottom surface 143 and includes a plurality of strip structures 161 and a plurality of dot structures 162. In the present embodiment, the strip structure 161 is located in the first reflection area 144, and the extension direction of the strip structure 161 is parallel to the light incident surface 141, and the dot structure 162 is located in the second reflection area 145. In addition, in the present embodiment, both the strip structure 161 and the dot structure 162 are convex structures, and the strip structure 161 is in a V-cut shape.
[0038] It should be particularly noted that, in this embodiment, the microstructure layer 160 can be formed by directly coating UV glue (UV-cured acrylate resin) on the bottom surface 143 of the substrate 140, and then curing the UV glue by irradiating it with ultraviolet light. In other words, the microstructure layer 160 can be a coating layer, and its thickness is extremely thin relative to the substrate 140, so that the design requirements of the thin backlight module 100 can be met.
[0039] See also Figure 2 and Figure 3In some embodiments, among the dot structures 162 located in the second reflective region 145, each dot structure 162 has the same size. Moreover, the dot structures 162 are sparsely distributed near the light incident surface 141, and densely distributed far from the light incident surface 141. In other words, the arrangement density of the dot structures 162 increases with the increase of the distance from the light source 180. In addition, among the strip structures 161 located in the first reflective region 144, there is a spacing between adjacent strip structures 161, and the spacing increases with the increase of the distance between the strip structures 161 and the light incident surface 141.
[0040] When one of the conventional light-guiding films (the entire surface is a V-cut strip structure) is used instead of the light-guiding film 120 of the present embodiment, after the light generated by the light source enters the substrate, the light with a larger angle (such as yellow light) will be emitted first, while the light with a smaller angle (such as blue light) will continue to propagate in the substrate until it is far away from the light source and then emits, which causes the light-emitting surface of the substrate to be yellow at the front and blue at the back. When another conventional light-guiding film (the entire surface is a dot structure) is used instead of the light-guiding film 120 of the present embodiment, after the light generated by the light source enters the substrate, the light with a smaller angle (such as blue light) will be absorbed more as the propagation distance increases when propagating in the substrate, which causes the light-emitting surface of the substrate to be blue at the front and yellow at the back. Therefore, in this embodiment, the microstructure layer 160 is formed into a V-cut strip structure 161 only near the light source 180 and into a dot structure 162 in other areas, so that part of the yellow light with a larger reflection angle is emitted first, thereby slowing down the bluing phenomenon of the light emitting surface 142 near the light incident surface 141, and improving the light emitting color of the light emitting surface 142 of the substrate 140 in the area near the light source 180 to present a slight blue color. At the same time, the yellow light emission level of the light emitting surface 142 at a position far from the light incident surface 141 is also reduced, so that the light emitting surface 142 appears slightly yellow in the area far from the light source 180, thereby greatly reducing the color difference of the light emitting surface 142, so as to achieve the purpose of balancing and harmonizing the light emitting color of the overall backlight module 100, thereby solving the problem of color difference. Furthermore, since the spacing of the strip structures 161 located in the first reflective area 144 increases with the increase of the distance between the strip structures 161 and the light incident surface 141, that is, as the distance from the light incident surface 141 increases, the strip structures 161 will become increasingly sparse, which causes the degree of yellow light being carried away from the light incident surface 141 by the strip structures 161 to gradually decrease. Combined with the fact that the material of the substrate 140 absorbs blue light and the effect gradually decreases toward the center, a good uniformity of light color difference is achieved.
[0041] In some embodiments, the size of each dot-shaped structure 162 may increase as the distance between the dot-shaped structure 162 and the light source 180 (or the light incident surface 141) increases. Figure 4In the embodiment shown, the dot-shaped structures 162 closer to the light source 180 are smaller in size, while the dot-shaped structures 162 farther from the light source 180 are larger in size. Thus, by configuring the dot-shaped structures 162 in different ways, the light output can be made more uniform.
[0042] See also Figure 5 , is a second preferred embodiment of the backlight module 200 of the present invention, which is substantially the same as the first preferred embodiment, except that the strip structures 261 have different arrangement designs. Figure 5 As shown, in this embodiment, a portion of the strip-shaped structures 261 is disposed in the second reflection region 245. That is, the strip-shaped structures 261 are not only distributed in the first reflection region 244, but also disposed in the region of the second reflection region 245 adjacent to the first reflection region 244. At the same time, the distribution region of the strip-shaped structures 261 is adjacent to the light incident surface 241 and the distribution region area occupies less than 50% of the area of the bottom surface 243. In addition, there is a spacing between adjacent strip-shaped structures 261, and the spacing increases as the distance between the strip-shaped structures 261 and the light incident surface 241 increases.
[0043] Therefore, in the second reflective area 245, there is an area where both the strip structure 261 and the dot structure 262 are arranged. In this area, the strip structure 261 and the dot structure 262 overlap to form a transition area, which makes the effect of compensating blue / yellow light smoother. In addition, when the dot structure 262 is formed on the strip structure 261, the bright line formed by the strip structure 261 can also be made more blurred and less obvious.
[0044] It should be further explained that the light guide film 220 of the present invention has the same thickness as the light source 280 or a smaller thickness to meet the design trend of thinning the backlight module 200. However, in the technical field of lighting fixtures, there is no requirement for extremely thin backlight modules 200, and the light guide film 220 can have a relatively large thickness and be manufactured by injection molding or the like.
[0045] Therefore, if Figure 6, which is a third preferred embodiment of the backlight module 300 of the present invention. The backlight module 300 of this embodiment is substantially the same as the aforementioned backlight module, except that the backlight module 300 of this embodiment does not use the aforementioned light guide film, but uses a light guide plate 320. The light guide plate 320 includes a substrate 340, and a plurality of strip structures 361 and a plurality of dot structures 362 formed on the substrate 340. Similarly, the substrate 340 has a light incident surface 341, a light emitting surface 342 adjacent to the light incident surface 341, and a bottom surface 343 adjacent to the light incident surface 341 and spaced from the light emitting surface 342. The bottom surface 343 has a first reflection area 344 adjacent to the light incident surface 341, and a second reflection area 345 outside the first reflection area 344. The stripe structure 361 and the dot structure 362 are formed on the bottom surface 343 of the substrate 340, wherein the stripe structure 361 is located in the first reflection area 344, and the dot structure 362 is located in the second reflection area 345. In this embodiment, the arrangement and function of the stripe structure 361 and the dot structure 362 are similar to Figure 1 The embodiments shown are the same and will not be described again.
[0046] It should be noted that in this embodiment, the light guide plate 320 is manufactured by using a mold in an integral injection molding manner. Therefore, the substrate 340, the strip-shaped structure 361, and the dot-shaped structure 362 are integrally molded. Figure 1 As shown, the substrate 140 and the microstructure layer 160 are in a layered structure.
[0047] See also Figure 7 , which is a fourth preferred embodiment of the backlight module 400 of the present invention. The backlight module 400 of this embodiment is substantially the same as the aforementioned third preferred embodiment, and the only difference is that the strip structure 461 has a different arrangement design. Figure 7 As shown, in this embodiment, a portion of the strip-shaped structures 461 is disposed in the second reflection region 445. That is, the strip-shaped structures 461 are not only distributed in the first reflection region 444, but also disposed in the region of the second reflection region 445 adjacent to the first reflection region 444. At the same time, the distribution region of the strip-shaped structures 461 is adjacent to the light incident surface 441 and the distribution region area occupies less than 50% of the area of the bottom surface 443. In addition, there is a spacing between adjacent strip-shaped structures 461, and the spacing increases as the distance between the strip-shaped structures 461 and the light incident surface 441 increases.
[0048] Therefore, in the second reflection area 445, there is an area where the strip structure 461 and the dot structure 462 are arranged at the same time, and in this area, the strip structure 461 and the dot structure 462 overlap to form a transition area. In this embodiment, first, a groove corresponding to the strip structure 461 (V-cut shape) is made on the mold in the area corresponding to the transition area, and then a circular groove corresponding to the dot structure 462 (dot shape) is made on the groove by laser engraving. Accordingly, the light guide plate 420 formed by injection molding with the mold can simultaneously form the dot structure 462 on the strip structure 461 in the second reflection area 445.
[0049] See also Figure 8 , which is the fifth preferred embodiment of the backlight module 500 of the present invention. The backlight module 500 of this embodiment is substantially the same as the first preferred embodiment, except that this preferred embodiment further includes an optical film set 540 disposed on the light guide film 520. The optical film set 540 can be selected from a diffusion film, a prism film or a brightness enhancement film, thereby enabling the backlight module 500 to have a better optical effect. Of course, the light guide film 520 can also be replaced by Figure 6 or Figure 7 The light guide plate shown is not Figure 8 The content disclosed is limited.
[0050] See also Fig. 9 , which is a preferred embodiment of the display device 600 of the present invention, comprises: Figure 8 The backlight module 500 shown in the figure and the display panel 620 arranged in the light emitting direction of the optical film group 540. After the light generated by the light source 680 enters the light guide film 520, it will be emitted through the light guide film 520 and the optical film group 540 and enter the display panel 620, and can achieve the same purpose as mentioned above. It should be particularly noted that the display panel 620 has a visible area 621 and a non-visible area 622, the non-visible area 622 is located at the periphery of the visible area 621, and the first reflective area 544 is located within the projection range of the non-visible area 622. With this design, it is possible to prevent the bright line formed by the strip structure 561 from appearing in the visible area 621 and affecting the visual effect presented by the display device 600.
[0051] In summary, the present invention provides a strip structure and a dot structure on the bottom surface of the light guide film or the light guide plate, and adjusts the arrangement and density of the strip structure and the dot structure to achieve the purpose of balancing and blending the light output color of the overall backlight module, thereby solving the color difference problem, so the purpose of the present invention can indeed be achieved.
[0052] The above description is only a preferred embodiment of the present invention, and should not be used to limit the scope of implementation of the present invention. That is, any simple equivalent changes and modifications made based on the scope of the patent application of the present invention and the description of the present invention are still within the scope of the patent coverage of the present invention.
[0053] [List of Reference Numerals]
[0054] 100 Backlight Module
[0055] 120 Light guide film
[0056] 140 Base Material
[0057] 141 Light incident surface
[0058] 142 Light emitting surface
[0059] 143 Bottom
[0060] 144 First Reflection Area
[0061] 145 Second Reflection Area
[0062] 160 Microstructure layer
[0063] 161 Strip structure
[0064] 162 Point structure
[0065] 180 Light Source
[0066] 200 Backlight Module
[0067] 220 Light Guide Film
[0068] 241 Light incident surface
[0069] 243 Bottom
[0070] 244 First Reflection Area
[0071] 245 Second Reflection Area
[0072] 261 Strip structure
[0073] 262 Point structure
[0074] 280 Light Source
[0075] 300 Backlight Module
[0076] 320 Light Guide Plate
[0077] 340 Base Material
[0078] 341 Light-entering surface
[0079] 342 Light emitting surface
[0080] 343 Bottom
[0081] 344 First Reflection Area
[0082] 345 Second Reflection Area
[0083] 361 Strip structure
[0084] 362 Point structure
[0085] 380 Light Source
[0086] 400 Backlight Module
[0087] 420 Light Guide Plate
[0088] 441 Light incident surface
[0089] 443 Bottom
[0090] 444 First Reflection Area
[0091] 445 Second Reflection Area
[0092] 461 Strip structure
[0093] 462 Point structure
[0094] 480 Light Source
[0095] 500 Backlight Module
[0096] 520 Light Guide Film
[0097] 544 First Reflection Area
[0098] 545 Second Reflection Area
[0099] 540 Optical Film Set
[0100] 561 Strip structure
[0101] 562 Point structure
[0102] 580 Light Source
[0103] 600 Display Device
[0104] 620 Display Panel
[0105] 621 Viewing Area
[0106] 622 Non-visible area
[0107] 680 light sources.
Claims
1. A light guide film, characterized in that: Include: A substrate, the substrate having a light incident surface, a light emitting surface adjacent to the light incident surface, and a bottom surface adjacent to the light incident surface and spaced apart from the light emitting surface, the bottom surface having a first reflection area adjacent to the light incident surface, and a second reflection area outside the first reflection area; and A microstructure layer, the microstructure layer is disposed on the bottom surface of the substrate and comprises a plurality of strip structures and a plurality of dot structures, wherein the strip structures are at least located in the first reflection area, and the extension direction of the strip structures is parallel to the light incident surface, and the dot structures are located in the second reflection area, wherein, There is a spacing between adjacent strip structures, and the spacing increases as the distance between the strip structure and the light incident surface increases. By arranging the strip structure in the first reflection area adjacent to the light incident surface, the yellow light portion with a larger reflection angle can be emitted, thereby increasing the degree of yellow light emission of the light emitting surface at a position adjacent to the light incident surface and alleviating the bluing phenomenon of the light emitting surface at a position adjacent to the light incident surface; and by arranging the dot structure in the second reflection area far from the light incident surface, the degree of yellow light emission of the light emitting surface at a position far from the light incident surface can be reduced, thereby achieving good uniformity of light emission color difference.
2. The light guide film according to claim 1, characterized in that: A portion of the strip structure is disposed in an area of the second reflection area adjacent to the first reflection area.
3. The light guide film according to claim 1, characterized in that: The distribution region of the strip-shaped structure is adjacent to the light incident surface and the area of the distribution region occupies less than 50% of the area of the bottom surface.
4. The light guide film according to claim 1, characterized in that: The dot-shaped structures are distributed more sparsely near the light incident surface, and more densely away from the light incident surface.
5. The light guide film according to claim 1, characterized in that: The size of the dot-shaped structure is smaller at a location adjacent to the light incident surface, and is larger at a location away from the light incident surface.
6. A backlight module, characterized in that: The invention comprises the light-guiding film according to any one of claims 1 to 5, and a light source, wherein the light source emits light toward the light incident surface of the substrate.
7. The backlight module according to claim 6, characterized in that: The invention also comprises an optical film group arranged on the light-guiding film.
8. A display device, characterized in that: It comprises the backlight module according to claim 6 or 7, and a display panel arranged on the backlight module.
9. The display device according to claim 8, characterized in that: The display panel has a visible area and a non-visible area. The non-visible area is located at the periphery of the visible area, and the first reflective area of the substrate is located within the projection range of the non-visible area.
10. A light guide plate, characterized in that: Include: A substrate, the substrate having a light incident surface, a light emitting surface adjacent to the light incident surface, and a bottom surface adjacent to the light incident surface and spaced from the light emitting surface, the bottom surface having a first reflection area adjacent to the light incident surface, and a second reflection area outside the first reflection area; and A plurality of strip structures and a plurality of dot structures are formed on the bottom surface of the substrate, wherein the strip structures are at least located in the first reflection area, and the extension direction of the strip structures is parallel to the light incident surface, and the dot structures are located in the second reflection area, wherein, There is a spacing between adjacent strip structures, and the spacing increases as the distance between the strip structure and the light incident surface increases. By arranging the strip structure in the first reflection area adjacent to the light incident surface, the yellow light portion with a larger reflection angle can be emitted, thereby increasing the degree of yellow light emission of the light emitting surface at a position adjacent to the light incident surface and alleviating the bluing phenomenon of the light emitting surface at a position adjacent to the light incident surface; and by arranging the dot structure in the second reflection area far from the light incident surface, the degree of yellow light emission of the light emitting surface at a position far from the light incident surface can be reduced, thereby achieving good uniformity of light emission color difference.
11. The light guide plate according to claim 10, characterized in that: A portion of the strip structure is disposed in an area of the second reflection area adjacent to the first reflection area.
12. The light guide plate according to claim 10, characterized in that: The distribution region of the strip-shaped structure is adjacent to the light incident surface and the area of the distribution region occupies less than 50% of the area of the bottom surface.
13. The light guide plate according to claim 10, characterized in that: The dot-shaped structures are distributed more sparsely near the light incident surface, and more densely away from the light incident surface.
14. The light guide plate according to claim 10, characterized in that: The size of the dot-shaped structure is smaller at a location adjacent to the light incident surface, and is larger at a location away from the light incident surface.
15. A backlight module, characterized in that: The invention comprises a light guide plate according to any one of claims 10 to 14, and a light source, wherein the light source emits light toward the light incident surface of the substrate.
16. The backlight module according to claim 15, characterized in that: It also includes an optical film group arranged on the light guide plate.
17. A display device, characterized in that: It comprises the backlight module according to claim 15 or 16, and a display panel arranged on the backlight module.
18. The display device according to claim 17, characterized in that: The display panel has a visible area and a non-visible area, the non-visible area is located at the periphery of the visible area, and the first reflective area is located within the projection range of the non-visible area.