Optical film group and display device

Abstract

The invention provides an optical film group. The optical film group comprises optical films. The optical film comprises a substrate and a plurality of light guide structures. The substrate is provided with a light-in surface and a light-out surface which are oppositely arranged. The light guide structures are arranged on the light incident surface of the substrate, each light guide structure comprises two light guide surfaces which are oppositely arranged, an included angle is formed between each light guide surface and the normal of the light incident surface, and the included angle is larger than 0 degree and smaller than 25 degrees. The optical film group provided by the invention has a good forward luminance gain effect. The invention also provides a display device with the optical film group. The display device provided by the invention has good optical performance.

Description

Technical Field

[0001] The invention relates to an optical film set and a display device. Background Art

[0002] Generally speaking, the forward brightness gain of a display device is achieved by configuring a diffuser and configuring one or two positive prism sheets on it. However, the brightness gain effect achieved by the above structure is limited, mainly because the diffuser and the positive prism sheet are both light-collecting effects, that is, there is no optical matching mechanism between the films. Summary of the invention

[0003] The present invention provides an optical film set with good forward brightness gain effect. The present invention also provides a display device using the optical film set with good optical performance.

[0004] Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

[0005] In order to achieve one or part or all of the above purposes or other purposes, according to one embodiment of the present invention, an optical film set is provided, including a first optical film. The first optical film includes a first substrate and a plurality of first light-guiding structures. The first substrate has a first light-entry surface and a first light-exiting surface that are arranged opposite to each other. The plurality of first light-guiding structures are arranged on the first light-entry surface of the first substrate, wherein each first light-guiding structure includes two first light-guiding surfaces that are arranged opposite to each other, and each of the two first light-guiding surfaces has a first angle with the normal of the first light-entry surface, and the angle of the first angle is greater than 0 degrees and less than 25 degrees.

[0006] According to another embodiment of the present invention, a display device is provided, comprising a liquid crystal display panel and a backlight module. The backlight module and the liquid crystal display panel are stacked and include an optical film group. The optical film group includes a first substrate and a plurality of first light guide structures. The first substrate has a first light incident surface and a first light emitting surface that are arranged opposite to each other. The plurality of first light guide structures are arranged on the first light incident surface of the first substrate, wherein each first light guide structure includes two first light guide surfaces that are arranged opposite to each other, and each of the two first light guide surfaces has a first angle with the normal of the first light incident surface, and the angle of the first angle is greater than 0 degrees and less than 25 degrees. The liquid crystal display panel is arranged on the side of the first light emitting surface away from the first light incident surface.

[0007] According to another embodiment of the present invention, a display device is provided, comprising a self-luminous display panel and an optical film group. The optical film group is arranged on the display surface of the self-luminous display panel, and comprises a first substrate and a plurality of first light guide structures. The first substrate has a first light incident surface and a first light emitting surface arranged opposite to each other. The plurality of first light guide structures are arranged on the first light incident surface of the first substrate, wherein each first light guide structure comprises two first light guiding surfaces arranged opposite to each other, each of the two first light guiding surfaces has a first angle with the normal of the first light incident surface, and the angle of the first angle is greater than 0 degrees and less than 25 degrees. The self-luminous display panel is arranged on the side of the first light incident surface away from the first light emitting surface.

[0008] Based on the above, the optical film group provided in the embodiment of the present invention includes a substrate and a plurality of light-guiding structures, each light-guiding structure includes two light-guiding surfaces arranged opposite to each other, and an angle is provided between the normal of the light-guiding surface and the light-incident surface, and the angle of the angle is greater than 0 degrees and less than 25 degrees. The backlight module equipped with the optical film group can maintain the forward light of the backlight source as forward light, and make the side light of the backlight source approach the forward direction. The self-luminous display device equipped with the optical film group can maintain the forward light of the self-luminous display panel as forward light, and make the side light be recycled back to the self-luminous display panel, and then be emitted in a direction closer to the forward direction after being reflected by the reflective component inside the self-luminous display panel.

[0009] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1A A schematic diagram of a display device according to an embodiment of the present invention is shown.

[0011] Figure 1B A schematic diagram of an optical film assembly according to an embodiment of the present invention is shown.

[0012] Figure 1C A schematic diagram of a light field of backlight penetrating an optical film assembly according to an embodiment of the present invention is shown.

[0013] Figure 2A The diagram shows a plan view of an optical film assembly according to an embodiment of the present invention formed in the second direction and the third direction.

[0014] Figure 2B The diagram shows a plan view of an optical film assembly according to an embodiment of the present invention formed in a first direction and a third direction.

[0015] Figure 2C A schematic diagram of a light field of backlight penetrating an optical film assembly according to an embodiment of the present invention is shown.

[0016] Figure 3AA schematic diagram of a display device according to an embodiment of the present invention is shown.

[0017] Figure 3B A schematic diagram of an optical film according to an embodiment of the present invention is shown.

[0018] Figure 3C A schematic diagram of the light field of backlight penetrating the optical film according to an embodiment of the present invention is shown.

[0019] Figure 4 A schematic diagram of a display device according to an embodiment of the present invention is shown.

[0020] Figure 5 A schematic diagram of an optical film according to an embodiment of the present invention is shown.

[0021] Description of reference numerals:

[0022] 1, 2, 3: Display device

[0023] 10: Backlight module

[0024] 10A, 10B: Optical film set

[0025] 20: LCD panel

[0026] 30: Self-luminous display panel

[0027] 100, 200, 300, 400, 500, 600, 700: optical film

[0028] 101, 201, 301, 401, 501, 601, 701: base

[0029] 101A, 201A, 301A, 401A, 501A, 701A: light incident side

[0030] 101B, 201B, 301B, 401B, 501B, 701B: light-emitting surface

[0031] 102, 202, 302, 402, 502, 602, 702: light guide layer

[0032] D1, D2, D3: Direction

[0033] I0: Image Light

[0034] L1, I 1: forward light

[0035] L2, I2: side light

[0036] L0: Backlight

[0037] MS1, MS2, MS3, MS4, MS5, MS6, MS7: light guide structure

[0038] N: Normal

[0039] P5, P7: Plane

[0040] PX: Pixel unit

[0041] S1, S3, S5, S7, S8: Light guide surface

[0042] θ1, θ5: angle. DETAILED DESCRIPTION

[0043] The above-mentioned other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions with reference to the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0044] Reference Figure 1A as well as Figure 1B , Figure 1A A schematic diagram of a display device according to an embodiment of the present invention is shown. Figure 1B Draw Figure 1A Schematic diagram of the optical film group in.

[0045] The display device 1 includes a liquid crystal display panel 20 and a backlight module 10. The backlight module 10 includes a backlight source (not shown) and an optical film group 10A, and is stacked with the liquid crystal display panel 20. The backlight source is, for example, a direct backlight source or an edge-type backlight source, wherein the edge-type backlight source includes a light guide plate and a light-emitting element located on one side of the light guide plate. The backlight source is used as a planar light source to provide a backlight L0, such as Figure 1B The optical film set 10A includes an optical film 100, the optical film 100 includes a substrate 101 and a light guide layer 102, the light guide layer 102 includes a plurality of light guide structures MS1, each light guide structure MS1 is, for example, a prism structure, and has a triangular shape on a plane formed by a second direction D2 and a third direction D3, as shown in FIG. Figure 1A The substrate 101 has a light incident surface 101A and a light emitting surface 101B which are arranged opposite to each other. The backlight source of the backlight module 10 is arranged on the side of the light incident surface 101A away from the light emitting surface 101B, and the liquid crystal display panel 20 is arranged on the side of the light emitting surface 101B away from the light incident surface 101A. In other words, the optical film assembly 10A is arranged between the backlight source and the liquid crystal display panel 20.

[0046] These light-guiding structures MS1 are disposed on the light-incident surface 101A of the substrate 101, wherein each light-guiding structure MS1 includes two light-guiding surfaces S1 disposed opposite to each other, the two light-guiding surfaces S1 of each light-guiding structure MS1 are connected at a side away from the light-incident surface 101A, and each of the two light-guiding surfaces S1 has an angle θ1 with a normal line N of the light-incident surface 101A.

[0047] exist Figure 1A In the illustrated embodiment, the optical film set 10A of the display device 1 further includes an optical film 200, which overlaps with the optical film 100 and includes a substrate 201 and a light guide layer 202. The light guide layer 202 includes a plurality of light guide structures MS2. Each light guide structure MS2 is, for example, a prism structure and has a triangular shape on a plane formed by the second direction D2 and the third direction D3, such as Figure 1A As shown. Each light guide structure MS1 and each light guide structure MS2 are strip structures extending in the first direction D1. The substrate 201 has a light incident surface 201A and a light emitting surface 201B, the light incident surface 201A is located between the light emitting surface 101B and the light emitting surface 201B, and a plurality of light guide structures MS2 are arranged on the light emitting surface 201B, that is, the optical film 200 is arranged between the optical film 100 and the liquid crystal display panel 20. However, the present invention is not limited to this. In some embodiments, the optical film group 10A of the display device 1 includes the optical film 100 but does not include the optical film 200. In some embodiments, there is an angle between the extension direction of each light guide structure MS1 and the extension direction of each light guide structure MS2, and the angle range of the above angle is greater than or equal to 1 degree and less than or equal to 10 degrees. By means of the above structural configuration, the light field energy distribution after the backlight L0 penetrates the optical film 100 and the optical film 200 can be adjusted.

[0048] Please refer to the following Figure 1B In the backlight module 10 configured with the optical film 100 and the optical film 200, the backlight L0 from the backlight source includes the forward light L1 and the side light L2, wherein the main transmission path of the backlight L0 sequentially penetrates the light guide layer 102, the substrate 101, the substrate 201 and the light guide layer 202. It should be further explained that, in the second direction D2, the angle between the forward light L1 and the normal line N of the light incident surface 101A of the backlight L0 emitted from the backlight source is in the range of 0 to 5 degrees, and the angle between the side light L2 and the normal line N of the light incident surface 101A is in the range of 5 to 30 degrees.

[0049] Since the multiple light-guiding structures MS1 of the optical film 100 are disposed on the light-incident surface 101A of the substrate 101, and the multiple light-guiding structures MS1 extend toward the first direction D1, and the light-guiding surface S1 of each light-guiding structure MS1 is inclined relative to the normal line N of the light-incident surface 101A, after the forward light L1 penetrates the light-guiding layer 102 and the substrate 101, the forward light L1 emitted from the light-emitting surface 101B will greatly deviate from the normal line N of the light-incident surface 101A in the second direction D2. For example, the angle between the forward light L1 emitted from the light-emitting surface 101B and the normal line N of the light-incident surface 101A in the second direction D2 will be greater than 15 degrees. In other words, the angle between the forward light L1 emitted from the light emitting surface 101B and the normal N of the light incident surface 101A will be greater than the angle between the forward light L1 and the normal N when the light is incident on the light incident surface 101A, and after the side light L2 penetrates the light guiding layer 102 and the substrate 101, the angle between the side light L2 and the normal N of the light incident surface 101A will become smaller in the second direction D2. In other words, the angle between the side light L2 emitted from the light emitting surface 101B and the normal N of the light incident surface 101A will be smaller than the angle between the side light L2 and the normal N of the light incident surface 101A when the side light L2 is incident on the light incident surface 101A. In addition, since the plurality of light-guiding structures MS2 of the optical film 200 are disposed on the light-emitting surface 201B of the substrate 201, and the plurality of light-guiding structures MS2 extend toward the first direction D1, after the forward light L1 penetrates the substrate 201 and the light-guiding layer 202, the angle between the forward light L1 emitted from the light-emitting surface 201B and the normal line N of the light-entering surface 101A in the second direction D2 will be between 5 and 15 degrees. In other words, the angle between the forward light L1 emitted from the light-emitting surface 201B and the normal line N of the light-entering surface 101A will be smaller than the angle between the forward light L1 emitted from the light-emitting surface 201B and the normal line N of the light-entering surface 101A. The angle between the forward light L1 emitted from the light emitting surface 101B and the normal line N of the light incident surface 101A is smaller than the angle between the side light L2 emitted from the light emitting surface 201B and the normal line N of the light incident surface 101A in the second direction D2 after the side light L2 passes through the substrate 201 and the light guide layer 202. In other words, the side light L2 can form light closer to the forward direction after passing through the optical film 100 and the optical film 200 in sequence. That is, by configuring the following in the backlight module 10 Figure 1B The optical film set 10A shown can converge and concentrate the forward light L1 and the side light L2 in the backlight source toward the forward direction of the light incident surface 101A to effectively increase the forward brightness.

[0050] Specifically, please refer to Figure 1C , which illustrates a light field diagram of a backlight module of an embodiment of the present invention configured with an optical film set 10A. Figure 1CIn the figure, the area filled with the same mesh pattern represents a value range with similar light field energy values, and the area with denser dot distribution in the mesh pattern represents a value range with higher light field energy values ​​(i.e., an area with higher luminance value). Based on the structural features of the optical film 100 and the optical film 200 in the present embodiment, when the forward light L1 penetrates the optical film 100, the light field energy distribution of the forward light L1 in the second direction D2 will be separated, and when the forward light L1 penetrates the optical film 200, the light field energy distribution of the forward light L1 in the second direction D2 can be converged; in addition, when the side light L2 penetrates the optical film 100, the light field energy distribution of the side light L2 in the second direction D2 will converge, and when the side light L2 penetrates the optical film 200, the light field energy distribution of the side light L2 in the second direction D2 will be more converged. As mentioned above, after the forward light L1 and the side light L2 pass through the optical film 100 and the optical film 200, the light distribution in the second direction D2 will have the above-mentioned forward brightness enhancement effect. Compared with the backlight module with only a backlight source (not including any optical film), in this embodiment, the brightness gain of the backlight L0 emitted by the backlight source after passing through the optical film group 10A is 1.85 times. According to some embodiments of the present invention, when the angle θ1 between each light guide surface S1 and the normal line N of the substrate 101 is greater than 0 degrees and less than 25 degrees, the optical film group 10A can provide a good optical effect. It should be further explained that when the angle θ1 between each light guide surface S1 and the normal line N of the substrate 101 is greater than 5 degrees and less than 20 degrees, the optical film group 10A has a better optical effect. In some embodiments, the light guide layer 102, the substrate 101, the substrate 201, the light guide layer 202 or a combination thereof can be subjected to a haze treatment to avoid the appearance of Mura stripes in the image of the display device 1.

[0051] In order to fully illustrate the various embodiments of the present invention, other embodiments of the present invention will be described below. It must be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein the same numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. For the description of the omitted parts, please refer to the previous embodiments, and the following embodiments will not be repeated.

[0052] Please refer to the following FIG. 2A to FIG. 2C , Figure 2A A schematic plan view of an optical film assembly of a display device according to an embodiment of the present invention in a second direction D2 and a third direction D3 is shown. Figure 2B A schematic plan view of an optical film assembly of a display device according to an embodiment of the present invention in a first direction D1 and a third direction D3 is shown. Figure 2C The backlight penetration of the embodiment of the present invention is shown Figure 2A Schematic diagram of the light field of the backlight module of the optical film group. It should be noted that Figures 2A to 2CThe same embodiment.

[0053] The display device of this embodiment Figure 1A The difference of the display device 1 shown is that the optical film set 10B further includes an optical film 300 and an optical film 400 relative to the optical film set 10A, wherein the optical film 300 overlaps with the optical film 200, and the optical film 300 includes a substrate 301 and a light guide layer 302, and the light guide layer 302 includes a plurality of light guide structures MS3, each of which is, for example, a prism structure, and has a triangular shape on the plane formed by the first direction D1 and the third direction D3. The substrate 301 has a light incident surface 301A and a light emitting surface 301B arranged oppositely, and the light incident surface 301A is located between the light emitting surface 201B and the light emitting surface 301B. The plurality of light guide structures MS3 are arranged on the light incident surface 301A of the substrate 301, wherein each light guide structure MS3 includes two light guide surfaces S3 arranged oppositely, and the two light guide surfaces S3 of each light guide structure MS3 are connected on the side away from the light incident surface 301A. Each of the two light guide surfaces S3 of each light guide structure MS3 has an angle with the normal line (not shown) of the light incident surface 301A, and the angle of the angle is greater than 0 degrees and less than 25 degrees. Figure 1B The configuration relationship of the angle θ1 between each of the two light guiding surfaces S1 and the normal line N of the substrate 101 is the same, which will not be repeated here.

[0054] The optical film 400 overlaps with the optical film 300, and the optical film 400 includes a substrate 401 and a light guide layer 402, the light guide layer 402 includes a plurality of light guide structures MS4, each light guide structure MS4 is, for example, a prism structure, and has a triangular shape on the plane formed by the first direction D1 and the third direction D3. The substrate 401 has a light incident surface 401A and a light emitting surface 401B, and the light incident surface 401A is located between the light emitting surface 301B and the light emitting surface 401B. A plurality of light guide structures MS4 are disposed on the light emitting surface 401B. It should be further explained that, in the present embodiment, the optical film 300 and the optical film 400 are located between the optical film 200 and the liquid crystal display panel 20, wherein the optical film 300 is located between the optical film 200 and the optical film 400, and the optical film 400 is located between the optical film 300 and the liquid crystal display panel 20.

[0055] exist Figure 2A and Figure 2BIn the illustrated embodiment, each light guide structure MS1 and each light guide structure MS2 is a strip structure extending in the first direction D1, each light guide structure MS3 and each light guide structure MS4 is a strip structure extending in the second direction D2, and the first direction D1 is orthogonal to the second direction D2. However, the present invention is not limited thereto, and according to some embodiments of the present invention, the angle between the first direction D1 and the second direction D2 falls within the range of 70 degrees to 110 degrees.

[0056] Refer to Figure 2C , Figure 2C Is the display configuration Figure 2A Schematic diagram of the light field of the backlight module of the optical film group. Figure 2C In the figure, the area filled with the same mesh pattern represents a value range with similar light field energy values, and the area with denser dot distribution in the mesh pattern represents a value range with higher light field energy values ​​(i.e., an area with higher brightness value). In this embodiment, because optical film 300 and optical film 400 are further arranged on the optical film 200, and light guide structure MS3 and light guide structure MS4 extend toward the second direction D2, the light field energy distribution of forward light L1 and side light L2 in the first direction D1 can be further converged, thereby increasing the forward brightness of the light output distribution of backlight L0 in the first direction D1. Compared with a backlight module with only a backlight source (not including any optical film), in this embodiment, the brightness gain of backlight L0 after penetrating the optical film group 10B is 2.62 times.

[0057] Please refer to the following Figure 3A , Figure 3B as well as Figure 3C , Figure 3A A schematic diagram of a display device according to an embodiment of the present invention is shown. Figure 3B Draw Figure 3A Schematic diagram of an optical film of a display device, Figure 3C Display device configuration Figure 3B Schematic diagram of the light field of the optical membrane.

[0058] The display device 2 includes a self-luminous display panel 30 and an optical film group. The self-luminous display panel 30 has a plurality of pixel units PX. The optical film group is disposed on the display surface of the self-luminous display panel 30 and includes an optical film 500. The optical film 500 includes a substrate 501 and a light guide layer 502. The light guide layer 502 includes a plurality of light guide structures MS5. The substrate 501 has a light incident surface 501A and a light emitting surface 501B that are arranged opposite to each other. The light guide structures MS5 are disposed on the light incident surface 501A of the substrate 501, wherein each light guide structure MS5 includes two light guide surfaces S5 that are arranged opposite to each other, and each of the two light guide surfaces S5 has an angle θ5 with the normal line N of the substrate 501. The self-luminous display panel 30 is disposed on the side of the light incident surface 501A away from the light emitting surface 501B. Each light guide structure MS5 further includes a plane P5 connected between the two light guide surfaces S5, wherein the plane P5 is perpendicular to the normal N of the light incident surface 501A, and the plane P5 is parallel to the light incident surface 501A of the substrate 501. The plurality of light guide structures MS5 may be arranged at intervals, in other words, the light incident surface 501A is exposed between adjacent light guide structures MS5. In some embodiments, the spatial distribution period (pitch) of the plurality of light guide structures MS5 in the second direction D2 is 8 micrometers to 12 micrometers.

[0059] Reference Figure 3B, the image light I0 from the self-luminous display panel 30 includes the forward light I1 and the side light I2, and sequentially penetrates the light guide layer 502 and the substrate 501. It should be further explained that the angle between the forward light I1 emitted from the self-luminous display panel 30 and the normal line N of the light incident surface 501A is in the range of 0 to 5 degrees, and the angle between the side light I2 emitted from the self-luminous display panel 30 and the normal line N of the light incident surface 501A is in the range of 5 to 30 degrees. In this embodiment, the multiple light-guiding structures MS5 of the optical film 500 are arranged on the light incident surface 501A of the substrate 501, and the multiple light-guiding structures MS5 extend in the first direction D1, and part of the forward light I will pass through the plane P5 or part of the light incident surface 501A. Therefore, part of the forward light I1 will remain as forward light after penetrating the optical film 500. In other words, the angle between the part of the forward light I1 and the normal N of the light incident surface 501A after penetrating the optical film 500 is almost the same as the angle between the part of the forward light I1 and the normal N of the light incident surface 501A when it is emitted from the self-luminous display panel 30 in the second direction D2. For the lateral light I2 provided by the self-luminous display panel 30, since each light-guiding surface S5 is inclined relative to the normal line N of the substrate 501, the lateral light I2 will be reflected and refracted once or multiple times in the optical film 500 and then returned to the self-luminous display panel 30. After being reflected by the reflective component inside the self-luminous display panel 30, it will be emitted from the optical film 500 in a direction closer to the forward direction. In other words, after the lateral light I2 passes through the optical film 500, the angle between the lateral light I2 and the normal line of the light-entering surface 501A will become smaller in the second direction D2. That is to say, by configuring the display device 2 as follows Figure 3B The optical film 500 shown can effectively increase the forward brightness.

[0060] Specifically, please refer to Figure 3C , which shows that the display device is configured with Figure 3B Schematic diagram of the light field of the display device 2 of the optical film. Figure 3C In the figure, the area filled with the same mesh pattern represents a value range with similar light field energy values, and the area with denser distribution of dots in the mesh pattern represents a value range with higher light field energy values ​​(i.e., an area with higher brightness value). Figure 3CAs shown, based on the structural features of the optical film 500 in this embodiment, when the deflected light I2 penetrates the optical film 500, the light field energy distribution of the deflected light I2 in the second direction D2 can be converged. Compared with the self-luminous display panel without other optical films, in this embodiment, the brightness gain of the image light I0 after penetrating the optical film 500 is 1.33 times. According to some embodiments of the present invention, when the angle θ5 between each light guide surface S5 and the normal N of the substrate 501 is greater than 0 degrees and less than 25 degrees, the optical film 500 can provide a good optical effect. It should be further explained that when the angle θ5 between each light guide surface S5 and the normal N of the substrate 501 is greater than 5 degrees and less than 20 degrees, the optical film 500 has a better optical effect. In some embodiments, the light guide layer 502, the substrate 501 or a combination thereof can be subjected to atomization treatment to avoid the appearance of Mura stripes in the image of the display device 2.

[0061] In some embodiments of the present invention, a display device is provided, including a self-luminous display panel 30 and an optical film group. The optical film group is disposed on the display surface of the self-luminous display panel 30, and the optical film group includes two optical films 500, and a plurality of light-guiding structures MS5 of the two optical films 500 are both disposed on the light-incident surface 501A of the substrate 501, wherein each light-guiding structure MS5 of one optical film 500 is a strip-shaped structure extending in a first direction D1, and each light-guiding structure MS5 of the other optical film 500 is a strip-shaped structure extending in a second direction D2, and the first direction D1 is perpendicular to the second direction D2. Accordingly, a positive brightness enhancement effect is generated in both the first direction D1 and the second direction D2. This embodiment is different from the embodiment of the present invention. Figures 3A-3C The only difference is that two optical films 500 are used and the light guide structures MS5 of the two optical films 500 extend in different directions, so no separate schematic diagram is drawn.

[0062] Reference Figure 4 According to another embodiment of the present invention, a display device 3 is provided, comprising a self-luminous display panel 30 and an optical film set. The optical film set is disposed on the display surface of the self-luminous display panel 30, and the optical film set comprises an optical film 600, the optical film 600 comprises a substrate 601 and a light guide layer 602, and the light guide layer 602 comprises a plurality of light guide structures MS6. The optical film 600 of this embodiment is different from the optical film 500 in that the plurality of light guide structures MS6 are connected to each other at one side of the substrate 601.

[0063] Also refer to Figure 3A as well as Figure 5According to one embodiment of the present invention, a display panel is provided, including a self-luminous display panel 30 and an optical film group. The optical film group is configured on the display surface of the self-luminous display panel 30, and the optical film group includes an optical film 700, the optical film 700 includes a substrate 701 and a light guide layer 702, and the light guide layer 702 includes a plurality of light guide structures MS7. The substrate 701 has a light incident surface 701A and a light exit surface 701B that are arranged opposite to each other. The plurality of light guide structures MS7 are arranged on the light incident surface 701A of the substrate 701, wherein each light guide structure MS7 includes two light guide surfaces S7 that are arranged opposite to each other and two light guide surfaces S8 that are arranged opposite to each other. In the same light-guiding structure MS7, each of the two light-guiding surfaces S7 has an angle greater than 0 degree and less than 25 degrees with the normal line (not shown) of the light-entering surface 701A, and each of the two light-guiding surfaces S8 has an angle greater than 0 degree and less than 25 degrees with the normal line of the substrate 701; it should be further explained that when the angle between the light-guiding surface S7 and the normal line is greater than 5 degrees and less than 20 degrees, and the angle between the light-guiding surface S8 and the normal line is greater than 5 degrees and less than 20 degrees, the optical film 700 has a better optical effect. The self-luminous display panel 30 is arranged on the side of the light-entering surface 701A away from the light-emitting surface 701B. Each light-guiding structure MS7 also includes a plane P7 connected between the two light-guiding surfaces S7 and the two light-guiding surfaces S8, wherein the plane P7 is perpendicular to the normal line of the light-entering surface 701A, and the plane P7 is parallel to the light-entering surface 701A. It should be further explained that the plurality of light guide structures MS7 may be arranged at intervals, that is, a portion of the light incident surface 701A is exposed from between adjacent light guide structures MS7.

[0064] In this embodiment, since each light guide surface S7 is inclined relative to the normal line of the light incident surface 701A, a positive brightness enhancement effect can be generated in the second direction D2. Moreover, since each light guide surface S8 is inclined relative to the normal line of the light incident surface 701A, a positive brightness enhancement effect can be generated in the first direction D1.

[0065] In summary, the optical film group provided in the embodiment of the present invention includes a substrate and a plurality of light-guiding structures, each light-guiding structure includes two light-guiding surfaces arranged opposite to each other, and an angle is provided between the light-guiding surface and the normal of the substrate, and the angle of the angle is greater than 0 degrees and less than 25 degrees. The backlight module equipped with the optical film group can maintain the forward light of the backlight source as forward light, and make the side light of the backlight source approach the forward direction. The self-luminous display device equipped with the optical film group can maintain the forward light of the self-luminous display panel as forward light, and make the side light be recycled back to the self-luminous display panel, and then be emitted in a direction closer to the forward direction after being reflected by the reflective component inside the self-luminous display panel.

[0066] However, the above is only a preferred embodiment of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. That is, all simple equivalent changes and modifications made according to the claims and the content of the invention are still within the scope of the patent of the present invention. In addition, any embodiment or claim of the present invention does not need to achieve all the purposes, advantages or features disclosed by the present invention. In addition, the abstract and title (invention name) are only used to assist in the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit on the number of elements.

Claims

1. An optical film assembly, characterized in that: The optical film set includes a first optical film, wherein: The first optical film comprises a first substrate and a plurality of first light guide structures, wherein: The first substrate has a first light incident surface and a first light emitting surface which are oppositely disposed; and The multiple first light guide structures are configured on the first light incident surface of the first substrate, wherein each of the multiple first light guide structures includes two first light guide surfaces arranged opposite to each other, and each of the two first light guide surfaces has a first angle with the normal of the first light incident surface, and the angle of the first angle is greater than 0 degree and less than 25 degrees.

2. The optical film assembly according to claim 1, characterized in that: The two first light guiding surfaces of each of the plurality of first light guiding structures are connected at a side away from the first light incident surface.

3. The optical film assembly according to claim 1, characterized in that: The optical film group also includes a second optical film, which overlaps with the first optical film. The second optical film includes a second base and a plurality of second light-guiding structures. The second base has a second light-entering surface and a second light-emitting surface. The second light-entering surface is located between the first light-emitting surface and the second light-emitting surface. The plurality of second light-guiding structures are arranged on the second light-emitting surface.

4. The optical film assembly according to claim 3, characterized in that: Each of the plurality of first light guide structures and each of the plurality of second light guide structures is a strip structure extending toward the first direction.

5. The optical film assembly according to claim 4, characterized in that: The optical film set further includes a third optical film and a fourth optical film, wherein: The third optical film overlaps with the second optical film, and the third optical film includes a third substrate and a plurality of third light guide structures, wherein: The third substrate has a third light incident surface and a third light emitting surface that are oppositely disposed, and the third light incident surface is located between the second light emitting surface and the third light emitting surface; and The plurality of third light guide structures are disposed on the third light incident surface of the third substrate, wherein each of the plurality of third light guide structures comprises two third light guide surfaces disposed opposite to each other, each of the two third light guide surfaces has a second angle with a normal line of the third light incident surface, and the magnitude of the second angle is greater than 0 degree and less than 25 degrees; and The fourth optical film overlaps with the third optical film, and the fourth optical film includes a fourth substrate and a plurality of fourth light guide structures, wherein: The fourth substrate has a fourth light incident surface and a fourth light emitting surface, and the fourth light incident surface is located between the third light emitting surface and the fourth light emitting surface; and The plurality of fourth light guide structures are disposed on the fourth light emitting surface.

6. The optical film assembly according to claim 5, characterized in that: The two third light guiding surfaces of each of the plurality of third light guiding structures are connected at a side away from the third light incident surface.

7. The optical film assembly according to claim 5, characterized in that: Each of the plurality of third light guiding structures and each of the plurality of fourth light guiding structures is a strip structure extending toward the second direction.

8. The optical film assembly according to claim 7, characterized in that: The angle between the first direction and the second direction falls within a range of 70 degrees to 110 degrees.

9. The optical film assembly according to claim 8, characterized in that: The first direction is orthogonal to the second direction.

10. The optical film assembly according to claim 1, characterized in that: Each of the plurality of first light guide structures further includes a first plane connected between the two first light guide surfaces, and the first plane is perpendicular to the normal line of the first light incident surface.

11. The optical film assembly according to claim 10, characterized in that: The plurality of first light guide structures are arranged at intervals.

12. The optical film assembly according to claim 10, characterized in that: The plurality of first light guide structures are connected to one another at one side of the first substrate.

13. The optical film assembly according to claim 10, characterized in that: Each of the multiple first light guide structures also includes two second light guide surfaces arranged opposite to each other, each of the two second light guide surfaces has a second angle with the normal of the first light incident surface, the second angle is greater than 0 degrees and less than 25 degrees, and the first plane is connected between the two second light guide surfaces.

14. A display device, characterized in that: The display device comprises a liquid crystal display panel and a backlight module, wherein: The backlight module is stacked with the liquid crystal display panel and includes an optical film set, wherein the optical film set includes a first substrate and a plurality of first light guide structures, wherein: The first substrate has a first light incident surface and a first light emitting surface which are oppositely disposed; and The multiple first light guide structures are arranged on the first light incident surface of the first substrate, wherein each of the first light guide structures includes two first light guide surfaces arranged opposite to each other, each of the first light guide surfaces has a first angle with the normal of the first light incident surface, and the angle of the first angle is greater than 0 degree and less than 25 degrees, wherein the liquid crystal display panel is arranged on the side of the first light emitting surface away from the first light incident surface.

15. A display device, characterized in that: The display device comprises a self-luminous display panel and an optical film group, wherein: The optical film set is disposed on the display surface of the self-luminous display panel and includes a first substrate and a plurality of first light guide structures, wherein: The first substrate has a first light incident surface and a first light emitting surface which are oppositely disposed; and The multiple first light guide structures are arranged on the first light incident surface of the first substrate, wherein each of the first light guide structures includes two first light introduction surfaces arranged opposite to each other, each of the first light introduction surfaces has a first angle with the normal of the first light incident surface, and the angle of the first angle is greater than 0 degree and less than 25 degrees, and the self-luminous display panel is arranged on the side of the first light incident surface away from the first light emitting surface.

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