Optical fiber display panel and display device

Abstract

The application is suitable for the technical field of display, and provides a fiber display panel and a display device.The fiber display panel comprises a pixel defining layer and a fiber panel.The pixel defining layer comprises a plurality of sub-pixels.The fiber panel is arranged above the pixel defining layer and is arranged in a spaced manner with the pixel defining layer.The fiber panel comprises a plurality of fiber units and a plurality of absorption columns.The fiber units are arranged in a corresponding manner with the sub-pixels.The absorption columns are arranged at the gaps between adjacent fiber units.The height of the absorption columns is less than or equal to the height of the fiber units.The display device comprises the fiber display panel.The fiber display panel provided by the application enables the light with a large angle in the light emitted by each sub-pixel to be incident to the junction between the corresponding fiber unit and the adjacent fiber unit, and the light leakage can be absorbed in the absorption column.The height of the absorption column is less than or equal to the height of the fiber unit, so that the balance between the definition and the brightness of the fiber display panel is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and more particularly, relates to a fiber optic display panel and a display device. Background Art

[0002] Fiber optic display panels consist of a fiber optic panel and a display assembly. Due to their large numerical aperture and low critical angle for total internal reflection, fiber optic panels offer high light transmission efficiency, minimal interstage coupling loss, clear and realistic image transmission, and optically zero thickness. Therefore, when fiber optic panels are used in display assemblies, they utilize the principle of total internal reflection in optical fibers to transmit images, bringing the displayed content to the surface, creating the illusion of viewing printed material.

[0003] However, since there is a certain distance between the pixel definition layer of the display component and the optical fiber panel, the area projected onto the bottom of the optical fiber panel by the light passing through a single sub-pixel is larger than the size of a single sub-pixel. As a result, the optical fiber within the area corresponding to the size of a single sub-pixel will be interfered with by the large-angle light of other sub-pixels, resulting in optical crosstalk problems and affecting clarity. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a fiber optic display panel and a display device to solve the technical problem of optical crosstalk caused by the spacing between the existing pixel definition layer and the fiber optic panel.

[0005] To achieve the above-mentioned object, the present invention adopts a technical solution as follows: providing a fiber optic display panel, comprising a pixel defining layer and a fiber optic panel, wherein the pixel defining layer comprises a plurality of sub-pixels, and the fiber optic panel is disposed above the pixel defining layer and spaced apart from the pixel defining layer, wherein the fiber optic panel comprises:

[0006] A plurality of optical fiber units are arranged side by side on the light-emitting side of the pixel defining layer, wherein the optical fiber units are arranged one by one with the sub-pixels or a plurality of the optical fiber units are arranged corresponding to the sub-pixels; and

[0007] A plurality of absorption columns are arranged in the gap between two adjacent optical fiber units, and the height of the absorption columns is less than or equal to the height of the optical fiber units.

[0008] By adopting the above technical solution, an absorption column is provided in the gap between two adjacent optical fiber units. As a result, when the light emitted by each sub-pixel with a larger angle is incident on the junction between the corresponding optical fiber unit and the adjacent optical fiber unit, the leaked light can enter the absorption column and be absorbed. Furthermore, by setting the height of the absorption column to be less than or equal to the height of the optical fiber unit, the crosstalk problem can be solved while balancing the brightness of the optical fiber display panel, achieving a balance between clarity and brightness of the optical fiber display panel.

[0009] Optionally, the bottom surface of the absorption column and the bottom surface of the optical fiber unit are located on the same plane.

[0010] By adopting the above technical solution, it is easy to fill the black glue to form the absorption column.

[0011] Optionally, the ratio of the height of the absorption column to the height of the optical fiber unit is in the range of 0.1-1.

[0012] By adopting the above technical solution, the brightness of the optical fiber display panel is prevented from being affected by an excessively large ratio, while the poor optical crosstalk effect is also solved by avoiding an excessively small ratio.

[0013] Optionally, the optical fiber unit includes:

[0014] fiber core; and

[0015] The cortex is arranged around the outer surface of the fiber core;

[0016] The angle at which light passing through each sub-pixel can enter the corresponding optical fiber unit satisfies the following formula: Wherein, L1 represents the diameter of the fiber core, D is the height of the fiber unit, and D1 represents the distance between the pixel definition layer and the fiber unit.

[0017] By adopting the above technical solution and reducing the distance between the pixel defining layer and the optical fiber unit, the effective angle at which light does not crosstalk can be increased.

[0018] Optionally, the angle at which the light emitted by the sub-pixel is absorbed by the corresponding absorption column when it enters the optical fiber units corresponding to the other N sub-pixels satisfies the following formula:

[0019] Wherein, N≥1, D2 represents the height of the absorption column, L1 represents the diameter of the fiber core, L2 represents the thickness of the cortex, and L3 represents the thickness of the absorption column.

[0020] By adopting the above technical solution, it can be seen from the formula that reducing the distance D1 between the pixel defining layer and the optical fiber unit, increasing the height D2 of the absorption column or increasing the thickness L3 of the absorption column can increase the β angle, thereby reducing crosstalk.

[0021] Optionally, the shape of the fiber core is circular, square or regular polygonal.

[0022] By adopting the above technical solution and using different shapes of fiber cores and sheaths, the diversification of optical fiber panels can be achieved.

[0023] Optionally, the thickness of the cortex is between 0.5λ and 1λ, wherein λ is the wavelength of the transmitted light.

[0024] By adopting the above technical solution, it is avoided that the thickness of the cortex is too small, causing light to penetrate the cortex and enter the adjacent optical fiber units to cause light leakage. At the same time, it is also avoided that the thickness of the cortex is too large, causing the size of the entire optical fiber panel to be too large.

[0025] Optionally, the absorption column is made of a mixture of epoxy resin and non-ferrous metal.

[0026] By adopting the above technical solution, the doping ratio is positively correlated with the light absorption effect. If the ratio is too small, the light absorption effect will be poor, but if it is too large, the viscosity of the absorption column will increase, making it difficult to fill.

[0027] Optionally, the ratio of the area of ​​the plurality of absorption columns to the area of ​​the optical fiber panel is between 0.2-0.43.

[0028] By adopting the above technical solution, the problem of too small a ratio resulting in too small an absorption column area, less absorbed crosstalk light, and reduced clarity is avoided; at the same time, the problem of too large a ratio resulting in too large an absorption column area, improved clarity but reduced brightness is avoided, thereby balancing brightness and clarity.

[0029] The present invention also provides a display device, comprising the above-mentioned optical fiber display panel.

[0030] By adopting the above technical solution, an absorption column is provided on the optical fiber unit, that is, the optical fiber unit is wrapped by the absorption column. As a result, when the light emitted by each sub-pixel with a larger angle is incident on the junction between the corresponding optical fiber unit and the adjacent optical fiber unit, the leaked light can enter the absorption column and be absorbed. Furthermore, by setting the height of the absorption column to be less than or equal to the height of the optical fiber unit, the crosstalk problem can be solved while balancing the brightness of the optical fiber display panel, achieving a balance between clarity and brightness of the optical fiber display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the optical path structure of a fiber optic display panel provided in an embodiment of the present invention;

[0033] Figure 2 A schematic cross-sectional view of a fiber optic display panel provided in an embodiment of the present invention;

[0034] Figure 3A schematic top view of the optical fiber panel provided in the first embodiment of the present invention;

[0035] Figure 4 A schematic top view of the optical fiber panel provided in the second embodiment of the present invention;

[0036] Figure 5 A schematic top view of the optical fiber panel provided in a third embodiment of the present invention;

[0037] Figure 6 A schematic top view of the structure of a fiber optic panel provided in a fourth embodiment of the present invention;

[0038] Figure 7 A schematic top view of the optical fiber panel according to a fifth embodiment of the present invention;

[0039] Figure 8 A schematic top view of the structure of a fiber optic panel provided in a sixth embodiment of the present invention;

[0040] Figure 9 A schematic top view of the optical fiber panel provided in a seventh embodiment of the present invention;

[0041] Figure 10 A schematic top view of the optical fiber panel provided in an eighth embodiment of the present invention;

[0042] Figure 11 This is a schematic top view of the optical fiber panel provided in the ninth embodiment of the present invention.

[0043] Among them, the reference numerals in the figures are:

[0044] 10- Fiber optic display panel;

[0045] 11-pixel defining layer; 110-subpixel; 1101-first subpixel; 1102-second subpixel; 1103-third subpixel; 111-substrate; 112-light shielding layer;

[0046] 12-fiber panel; 121-fiber unit; 1211-fiber core; 1212-cortex; 122-absorption column. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0049] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0051] Please also refer to Figure 1 and Figure 2 The fiber optic display panel 10 provided by an embodiment of the present invention is now described. The fiber optic display panel 10 can be connected to a backlight module to form a display device, which is widely used in electronic products such as televisions, mobile terminals or desktop monitors.

[0052] Specifically, the fiber optic display panel 10 includes a pixel defining layer 11 and a fiber optic panel 12. The pixel defining layer 11 includes a plurality of sub-pixels 110. The plurality of sub-pixels are sub-pixels of different colors, such as red, green, or blue, so that the fiber optic display panel 10 can emit light of different colors.

[0053] The optical fiber panel 12 is arranged above the pixel defining layer 11 and is spaced apart from the pixel defining layer 11. The optical fiber panel 12 includes multiple optical fiber units 121 and multiple absorption columns 122. The optical fiber units 121 are arranged corresponding to the sub-pixels 110, wherein the corresponding arrangement means that multiple optical fiber units 121 are arranged corresponding to the sub-pixels 110 or one optical fiber unit 121 corresponds to one sub-pixel 110; the absorption column 122 is arranged in the gap between two adjacent optical fiber units 121, and the height of the absorption column 122 is less than or equal to the height of the optical fiber unit 121.

[0054] It should be noted that there is a certain gap between the pixel definition layer and the optical fiber panel in the related technology. If the incident angle of the light emitted by each sub-pixel is greater than the maximum incident angle, then after the light beam enters the optical fiber panel, when the light beam is incident on the junction between two adjacent optical fiber units, it may be refracted and leak out from the corresponding optical fiber unit, forming light leakage. If no absorption column is set, the leakage light may be incident on the adjacent optical fiber unit and cause crosstalk.

[0055] Based on this, the inventors discovered through research that by providing an absorption column 122 in the gap between two adjacent optical fiber units 121, that is, wrapping the optical fiber unit 121 with the absorption column 122, when the light emitted by each sub-pixel with a larger angle is incident on the junction between the corresponding optical fiber unit 121 and the adjacent optical fiber unit 121, the leakage light can enter the absorption column 122 and be absorbed. Furthermore, by setting the height of the absorption column 122 to be less than or equal to the height of the optical fiber unit 121, the crosstalk problem can be solved while balancing the brightness of the optical fiber display panel 10, thereby achieving a balance between the clarity and brightness of the optical fiber display panel 10.

[0056] It can be understood that there are multiple sub-pixels 110, and the multiple sub-pixels 110 are respectively a first sub-pixel 1101, a second sub-pixel 1102, and a third sub-pixel 1103. For example, the light passing through the first sub-pixel 1101 is used. Figure 1 When the angles of light passing through the first sub-pixel 1101 are θ1 and θ2, when the height of the absorption column 122 is equal to the height of the optical fiber unit 121, the light within the angle range of θ1 can be absorbed, and the angle θ2 is reduced, that is, when the height of the absorption column 122 is equal to the height of the optical fiber unit 121, more crosstalk light can be absorbed. However, at this time, the brightness of the light of the optical fiber display panel 10 is low. By adjusting the filling height of the absorption column 122, a balance between clarity and brightness can be achieved.

[0057] In one embodiment of the present invention, see Figure 1 The bottom surface of the absorption column 122 is flush with the bottom surface of the optical fiber unit 121, wherein the bottom surface refers to the surface facing the pixel defining layer 11. The absorption column 122 is mainly formed by filling with visible light absorbing glue. Specifically, the transparent glass fiber can be corroded by acid and alkali, and then filled with black glue to form the absorption column 122. The bottom surface of the absorption column 122 is set to be flush with the bottom surface of the optical fiber unit 121 to facilitate filling with black glue.

[0058] Of course, in other embodiments, the bottom surface of the absorption column 122 can be set in the middle position of the optical fiber unit 121, or the top surface of the absorption column 122 can be flush with the top surface of the optical fiber unit 121, and the bottom surface of the absorption column 122 can be uneven with the bottom surface of the optical fiber unit 121. It can be selected according to specific needs as long as it can absorb crosstalk light.

[0059] Furthermore, when the ratio of the height D2 of the absorption column 122 to the height D of the optical fiber unit 121 is in the range of 0.1-1, in specific applications, the ratio of the height D2 of the absorption column 122 to the height D of the optical fiber unit 121 is in the range of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1, which can be selected according to specific needs, avoiding the ratio being too large to affect the brightness of the optical fiber display panel 11, and also avoiding the ratio being too small to have a poor effect in solving the optical crosstalk.

[0060] In one embodiment of the present invention, see Figure 1 The pixel defining layer 11 includes a substrate 111 and a plurality of light shielding layers 112 disposed on the substrate 111 at intervals, and a sub-pixel 110 is formed between two adjacent light shielding layers 112 .

[0061] In one embodiment of the present invention, see Figure 1 The optical fiber unit 121 includes a core 1211 and a cortex 1212 , wherein the cortex 1212 is disposed on the outer circumference of the core 1211 . The angle at which light passing through each sub-pixel 110 can enter the corresponding optical fiber unit 121 satisfies the following formula:

[0062] Among them, L1 represents the diameter of the fiber core 1211, D is the height of the optical fiber unit 121, and D1 represents the distance between the pixel defining layer 11 and the optical fiber unit 121, that is, the effective angle at which light does not crosstalk is α. By reducing the distance D1 between the pixel defining layer 11 and the optical fiber unit 121, the effective angle at which light does not crosstalk can be increased.

[0063] In one embodiment of the present invention, see Figure 1 When the light emitted by the sub-pixel 110 enters the optical fiber units 121 corresponding to the other N sub-pixels, the angle at which the light can be absorbed by the corresponding absorption column 122 satisfies the following formula:

[0064]

[0065] In the figure, N is a natural number, D2 represents the height of the absorption column 122 , L1 represents the diameter of the core 1211 , L2 represents the thickness of the skin 1212 , and L3 represents the thickness of the absorption column 122 .

[0066] Specifically, in this embodiment, when N is equal to 1, according to the geometric relationship of the figure, it can be concluded that as well as Thus we can deduce:

[0067] When N is equal to 2, according to the geometric relationship of the graph, we can conclude that: as well as Thus we can deduce:

[0068] By analogy, we can conclude that From this formula, we can know that by adjusting the filling height D2 of the absorption column, the crosstalk rate and light efficiency can be adjusted. Crosstalk refers to the light from other sub-pixel areas in a single sub-pixel area. For this pixel area, see Figure 2 The dotted area is the effective energy E1, and the light from other sub-pixels is the crosstalk. The area is the part E2 surrounded by the dotted and solid lines. The crosstalk rate refers to the ratio of E2 to E1. By reducing the distance D1 between the pixel defining layer 11 and the optical fiber unit 121, increasing the height D2 of the absorption column 122, or increasing the thickness L3 of the absorption column 122, the β angle can be increased, thereby reducing the crosstalk rate.

[0069] In one embodiment of the present invention, see Figure 3 , the core 1211 is a circular, square or regular polygonal structure; and / or, the cortex 1212 is a circular, square or regular polygonal structure, that is, the shape of the optical fiber unit 121 exists in the following situations: specific combination Figures 3 to 5 In the first case, the shape of the fiber core 1211 is circular, and the skin 1212 surrounding the outer surface of the fiber core 1211 can be a circular, square, or regular polygonal structure, wherein the circular fiber core 1211 is matched with the circular skin 1212, or the circular fiber core 1211 is matched with the square skin 1212, or the circular fiber core 1211 is matched with the regular polygonal skin 1212;

[0070] See Figures 6 to 8 In the second case, the fiber core 1211 is square, and the skin 1212 surrounding the outer surface of the fiber core 1211 can be a circular, square, or regular polygonal structure, wherein the square fiber core 1211 is matched with the circular skin 1212, or the square fiber core 1211 is matched with the square skin 1212, or the square fiber core 1211 is matched with the regular polygonal skin 1212;

[0071] See Figures 9 to 11The third case is that the shape of the fiber core 1211 is a regular polygon, and the skin 1212 surrounding the outer surface of the fiber core 1211 can be a circular, square or regular polygonal structure, wherein the regular polygonal fiber core 1211 is matched with a circular skin 1212, or the regular polygonal fiber core 1211 is matched with a square skin 1212, or the regular polygonal fiber core 1211 is matched with a regular polygonal structure skin 1212.

[0072] Preferably, in this embodiment, the shape of the fiber core 1211 is circular, and the shape of the skin 1212 is also circular.

[0073] In one embodiment of the present invention, see Figure 1 According to wave optics theory and Quincke prism experiments, when light is totally reflected at the interface between a high-refractive-index medium and a low-refractive-index medium, light penetration occurs at the interface. The penetration depth is related to the incident angle, wavelength, polarization direction, and refractive indices of the fiber core 1211 and the cortex 1212 of the incident light. If the thickness L2 of the cortex 1212 of the optical fiber unit 121 is less than this penetration depth, light will penetrate the cortex 1212 and escape, causing light leakage between the optical fiber units 121, which will further cause crosstalk. In this embodiment, the thickness L2 of the cortex 1212 is set between 0.5λ and 1λ, where λ is the wavelength of the transmitted light. This avoids the situation where the thickness L2 of the cortex 1212 is too small, causing light to penetrate the cortex 1212 and enter the adjacent optical fiber unit 121, causing light leakage. At the same time, it also avoids the situation where the thickness L2 of the cortex 1212 is too large, causing the size of the entire optical fiber panel 12 to be too large.

[0074] In a specific application, the thickness L2 of the skin layer 1212 is 0.5λ, 0.6λ, 0.7λ, 0.8λ, 0.9λ or 1λ, which can be selected according to specific needs.

[0075] In one embodiment of the present invention, the absorption column 122 is formed by a mixture of epoxy resin and non-ferrous metal, wherein the absorption column 122 includes but is not limited to epoxy resin, and the absorption column 122 may also include optical glue. The doping ratio is positively correlated with the light absorption effect. If the ratio is too small, it will lead to poor light absorption effect, but if it is too large, it will cause the viscosity of the absorption column 122 to increase, making it difficult to fill. The ratio refers to the ratio of epoxy resin to non-ferrous metal.

[0076] In one embodiment of the present invention, see Figure 3, the area ratio of the multiple absorption columns 122 to the area of ​​the optical fiber panel 12 is between 0.2-0.43. In specific applications, the area ratio of the multiple absorption columns 122 to the optical fiber panel 12 is 0.2, 0.21, 0.2, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42 or 0.43, which avoids the situation where the ratio is too small, resulting in too small area of ​​the absorption columns 122, less crosstalk light absorbed, and lower clarity; at the same time, it also avoids the situation where the ratio is too large, resulting in too large area of ​​the absorption columns 122, improved clarity, but reduced brightness, so that the brightness and clarity can be balanced, and can be selected according to specific needs.

[0077] See also Figure 1 The present invention also provides a display device, which is the fiber optic display panel 10 in any of the above embodiments.

[0078] The display device provided by the present invention utilizes the aforementioned fiber optic display panel 10. By providing an absorption column 122 in the gap between two adjacent fiber optic units 121, when light emitted by each sub-pixel with a larger angle is incident on the junction between the corresponding fiber optic unit 121 and the adjacent fiber optic unit 121, the leaked light can enter the absorption column 122 and be absorbed. Furthermore, by setting the height of the absorption column 122 to be less than or equal to the height of the fiber optic unit 121, the crosstalk problem can be resolved while balancing the brightness of the fiber optic display panel 10, thereby achieving a balance between clarity and brightness of the fiber optic display panel 10.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fiber optic display panel comprising a pixel defining layer and a fiber optic panel, wherein the pixel defining layer comprises a plurality of sub-pixels, and the fiber optic panel is disposed above the pixel defining layer and spaced apart from the pixel defining layer, characterized in that: The optical fiber panel comprises: A plurality of optical fiber units are arranged side by side on the light-emitting side of the pixel defining layer, wherein the optical fiber units are arranged one by one with the sub-pixels or a plurality of the optical fiber units are arranged corresponding to the sub-pixels; and A plurality of absorption columns are provided in the gap between two adjacent optical fiber units, wherein the height of the absorption columns is less than or equal to the height of the optical fiber unit; the optical fiber unit comprises: fiber core; and The cortex is arranged around the outer surface of the fiber core; The angle at which light passing through each sub-pixel can enter the corresponding optical fiber unit satisfies the following formula: , where L1 represents the diameter of the fiber core, D is the height of the fiber unit, and D1 represents the distance between the pixel definition layer and the fiber unit; The angle at which the light emitted by the sub-pixel is absorbed by the corresponding absorption column when it enters the optical fiber units corresponding to the other N sub-pixels satisfies the following formula: , where N≥1, D2 represents the height of the absorption column, L1 represents the diameter of the fiber core, L2 represents the thickness of the cortex, and L3 represents the thickness of the absorption column.

2. The fiber optic display panel according to claim 1, wherein: The bottom surface of the absorption column is flush with the bottom surface of the optical fiber unit.

3. The fiber optic display panel according to claim 1, wherein: The ratio of the height of the absorption column to the height of the optical fiber unit is in the range of 0.1-1.

4. The fiber optic display panel according to any one of claims 1 to 3, wherein: The shape of the fiber core is circular, square or regular polygon; and / or the shape of the skin is circular, square or regular polygon.

5. The fiber optic display panel according to any one of claims 1 to 3, wherein: The thickness of the cortex is between 0.5λ and 1λ, where λ is the wavelength of the transmitted light.

6. The fiber optic display panel according to any one of claims 1 to 3, wherein: The absorption column is made of a mixture of epoxy resin and non-ferrous metal.

7. The fiber optic display panel according to any one of claims 1 to 3, wherein: The ratio of the area of ​​the plurality of absorption columns to the area of ​​the optical fiber panel is between 0.2 and 0.

43.

8. A display device, characterized in that: A fiber optic display panel comprising the optical fiber display panel according to any one of claims 1 to 7.

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