Light-emitting panel and display module
By providing a light guide column and a reflective structure on the light-input side of the light guide plate, the design difficulty and cost problems caused by the large number of light source particles in the prior art are solved, and uniform light output of the light-emitting panel and reduced production costs are achieved.
Patent Information
- Application Number
- CN202420383628.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-02-28
AI Technical Summary
When ensuring the uniformity of light output, existing light emitting panels need to uniformly arrange multiple light source particles in the length direction of the light inlet surface of the light guide plate, which increases the design difficulty and production cost.
A light guide column is provided on the light-entry side of the light guide plate, and a light source is provided at its end. A first reflective structure is provided along the length direction on the light guide plate for reflecting light and entering the light guide plate, thereby achieving uniformity of the light output surface Light emission reduces the number of light source particles required.
Through the reflective structure on the light guide column, the uniform reflection and output of light in the light guide plate is achieved, reducing the structural complexity and production cost of the light emitting panel.
Smart Images
Figure CN222365105U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of optical technology, and in particular relates to a light-emitting panel and a display module. Background Art
[0002] At present, most light-emitting panels adopt a side-lit structure, that is, the surface of the light guide plate is used as the light-emitting surface and the side surface of the light guide plate is used as the light-entering surface, and a light source is arranged at the light-entering surface of the light guide plate. When working, the light emitted by the light source enters the light guide plate through the light-entering surface of the light guide plate, and the light is reflected in the light guide plate and then emitted from the light-emitting surface to finally achieve the purpose of emitting light from the light guide plate. However, in order to ensure uniform light emission from the entire light-emitting surface, the existing side-lit light-emitting panels usually need to evenly arrange multiple light source particles along the length direction of the light-entering surface of the light guide plate, which makes the design of the light-emitting panel difficult and increases the production cost. Utility Model Content
[0003] The utility model aims to provide a light-emitting panel and a display module, aiming to solve the technical problem that the light-emitting panel in the prior art uses too many light source particles and increases the manufacturing cost.
[0004] The utility model is implemented as follows: in a first aspect, a light-emitting panel is provided, comprising a light guide plate, a light guide column and a light source, wherein the light guide plate has a light emitting surface and a light incident surface; the light guide column is located at the light incident side of the light guide plate, the light source is arranged at the end of the light guide column, the light guide column has a first light reflecting structure arranged along the length direction of the light guide column, the first light reflecting structure is used to reflect the light in the light guide column so that the light emitted through the light guide column can enter the light guide plate from the light incident surface.
[0005] In an optional embodiment, the light guide column includes a first reflecting surface, which is arranged along the length direction of the light guide column, the first reflecting surface is located on the side of the light guide column opposite to the light incident surface, the first reflecting surface is parallel to the light incident surface, and the first reflective structure is arranged on the first reflecting surface.
[0006] In an optional embodiment, the first reflective structure includes a plurality of reflective protrusions, and the plurality of reflective protrusions are arranged at intervals along the length direction of the light guide cylinder.
[0007] In an optional embodiment, the reflective protrusion includes a reflective rib, and the reflective rib is arranged along a direction perpendicular to the length of the light guide cylinder.
[0008] In an optional embodiment, the first reflective structure includes a plurality of sawtooth structures, and the sawtooth structures are sequentially spaced apart along the length direction of the light guide cylinder.
[0009] In an optional embodiment, the light guide column further includes a curved surface, the curved surface and the first reflective surface are connected end to end to form a closed figure, and the radius of the curved surface matches the thickness of the light guide plate.
[0010] In an optional embodiment, the light guide plate has a second reflective surface arranged opposite to the light emitting surface, and a second reflective structure is arranged on the second reflective surface.
[0011] In an optional embodiment, the second light reflecting structure includes a plurality of reflective convex points arranged on the second reflective surface, and the reflective convex points are evenly distributed on the second reflective surface.
[0012] In an optional embodiment, the light emitting panel further includes a diffusion plate, and the diffusion plate is arranged on the light emitting side of the light guide plate.
[0013] In a second aspect, a display module is provided, comprising the light-emitting panel described in any one of the above items.
[0014] The technical effect of the utility model relative to the prior art is: by arranging a light guide cylinder on the light incident side of the light guide plate, and arranging a light source at the end of the light guide cylinder, and at the same time, the light guide cylinder also has a first reflective structure, the first reflective structure is used to reflect the light in the light guide cylinder, so that the light emitted by the light guide cylinder can enter the light guide plate from the light incident surface. Compared with the prior art, the light guide cylinder is arranged on the side of the light incident surface of the light guide plate, so that the light emitted by the light guide cylinder can enter the interior of the light guide plate through the light incident surface and be emitted from the light emitting surface after reflection, so that the light guide plate visually forms a luminous effect, and ensures the uniformity of the overall light output of the light guide plate. Only a small number of light sources need to be arranged at the end of the light guide column. By reflecting the light entering the light guide column through the first reflective structure on the light guide column, the entire light guide column can emit light outward along its own length direction, thereby ensuring that the light guide plate emits uniform light. There is no need to arrange multiple light source particles on the light incident side of the light guide plate, which reduces the number of light source particles used in the light-emitting panel, makes the structure of the light-emitting panel simpler, and reduces the production cost of the light-emitting panel.
[0015] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 This is a schematic diagram of the structure of the light-emitting panel provided by the embodiment of the utility model. Figure 1 ;
[0018] Figure 2 This is a schematic diagram of the structure of the light-emitting panel provided by the embodiment of the utility model. Figure 2 ;
[0019] Figure 3 It is a schematic cross-sectional structure diagram of a light-emitting panel provided in an embodiment of the utility model;
[0020] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;
[0021] Figure 5 It is a structural schematic diagram of a light-guiding column used in one embodiment of the utility model;
[0022] Figure 6 It is a structural schematic diagram of a light guide column used in another embodiment of the utility model.
[0023] Description of reference numerals:
[0024] 1. Light guide plate; 11. Light emitting surface; 12. Light incident surface; 13. Second reflective surface; 14. Second reflective structure; 141. Reflective convex point; 2. Light guide column; 21. First reflective surface; 22. First reflective structure; 221. Reflective convex part; 222. Sawtooth structure; 23. Arc surface; 3. Light source; 4. Diffuser plate. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0026] In the description of the present invention, 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0030] Please refer to Figures 1 to 4 As shown, in an embodiment of the utility model, a light-emitting panel is provided, including a light guide plate 1, a light guide column 2 and a light source 3. The light guide plate 1 has a light emitting surface 11 and a light incident surface 12; the light guide column 2 is located on the light incident side of the light guide plate 1, and the light source 3 is arranged at the end of the light guide column 2. The light guide column 2 has a first reflective structure 22 arranged along the length direction of the light guide column 2. The first reflective structure 22 is used to reflect the light entering the light guide column 2 so that the light emitted by the light guide column 2 can enter the interior of the light guide plate 1 from the light incident surface 12.
[0031] Specifically, the light guide plate 1 refers to a plate-shaped component used to guide and control the propagation direction of light. The light guide plate 1 is usually made of a transparent material with a high refractive index and does not absorb light, such as acrylic. The light-emitting surface 11 usually refers to the plate surface of the light guide plate 1, and of course it can also be the side of the light guide plate 1; the light-entering surface 12 usually refers to the side of the light guide plate 1, and it can also be the plate surface of the light guide plate 1. The plate surface refers to the two planes with the largest area of the plate, and the side refers to the surface of the plate other than the plate surface. When the light guide plate 1 adopts the side-light type, the light-emitting surface 11 is generally the plate surface of the light guide plate 1, and the light-entering surface 12 is usually the side of the light guide plate 1. Among them, the light guide plate 1 can reflect the light entering the light guide plate 1 by setting a reflective structure on the surface, such as setting convex points, pits or other reflective structures that can reflect light; it can also reflect light by setting ink dots on the surface of the light guide plate 1; it can also reflect light by setting light guide points inside the light guide plate 1. Light can enter the interior of the light guide plate 1 through the light incident surface 12 and be emitted from the light emitting surface 11 after being reflected, so that the light guide plate 1 visually forms a luminous effect.
[0032] The light guide column 2 refers to a columnar component used to guide and control the propagation direction of light. The light guide column 2 can be made of a transparent material with a high refractive index and does not absorb light, such as acrylic, etc., wherein the cross-section of the light guide column 2 can be circular, square or other polygonal, etc. The light source 3 is a unit that can emit light, such as an LED lamp bead, etc. The light source 3 can be a single LED lamp bead or multiple. The light source 3 is arranged at at least one end of the light guide column 2, and the light emitted by the light source 3 can be transmitted along the length direction of the light guide column 2. The reflective structure refers to a structure that can reflect the light in the light guide column 2. The first reflective structure 22 can be a microstructure arranged on the light guide column 2, such as a convex point, a pit or other structure that can reflect light; it can also be arranged on the surface of the light guide column 2 to reflect light in the way of ink dots; it can also be arranged inside the light guide column 2 to reflect light in the way of light guiding points. The reflective structure is arranged along the length direction of the light guide cylinder 2. The reflective structure can reflect the light during the transmission along the length direction of the light guide cylinder 2, so that the entire light guide cylinder 2 can emit light outward along its own length direction.
[0033] The light-emitting panel provided by the embodiment of the utility model is provided with a light guide cylinder 2 on the light incident side of the light guide plate 1, and a light source 3 is provided at at least one end of the light guide cylinder 2, and the light guide cylinder 2 also has a first light reflecting structure 22, and the first light reflecting structure 22 is used to reflect the light in the light guide cylinder 2 so that the light emitted through the light guide cylinder 2 can enter the light guide plate 1 from the light incident surface 12. Compared with the prior art, the light guide cylinder 2 is provided on the side of the light incident surface 12 of the light guide plate 1, so that the light emitted from the light guide cylinder 2 can enter the interior of the light guide plate 1 through the light incident surface 12 and be emitted from the light emitting surface 11 after reflection, so that the light guide plate 1 forms a light-emitting effect visually, and ensures the uniformity of the light emission of the light guide plate 1 as a whole. Only a small number of light sources 3 need to be arranged at the end of the light guide column 2. By reflecting the light entering the light guide column through the first reflective structure 22 on the light guide column 2, the entire light guide column 2 can emit light outward along its own length direction, thereby ensuring that the light guide plate 1 emits light evenly. There is no need to arrange multiple light source 3 particles on the light incident side of the light guide plate 1, which reduces the number of light source 3 particles used in the light-emitting panel, makes the structure of the light-emitting panel simpler, and reduces the overall production cost of the light-emitting panel.
[0034] In one embodiment, Figure 1 and Figure 2 As shown, the light guide cylinder 2 includes a first reflective surface 21, which is arranged along the length direction of the light guide cylinder 2, and is located on the side of the light guide cylinder 2 opposite to the light incident surface 12, and the first reflective surface 21 is parallel to the light incident surface 12, and the first reflective structure 22 is arranged on the first reflective surface 21. Specifically, the first reflective surface 21 generally refers to a planar structure with a certain area, and the first reflective surface 21 can be arranged on the side surface of the light guide cylinder 2 except for the two end surfaces. The arrangement of the first reflective surface 21 can provide space for the arrangement of the first reflective structure 22, so that the arrangement of the first reflective structure 22 is more convenient. At the same time, the first reflecting surface 21 is arranged along the length direction of the light guide column 2, and the first reflecting surface 21 is arranged opposite to the light incident surface 12 of the light guide plate 1. At this time, the first reflecting structure 22 is arranged on the first reflecting surface 21, so that the intensity of the light reflected by the first reflecting structure 22 can be kept uniform along the length direction of the light guide column 2, thereby keeping the intensity of the light incident into the light guide plate 1 uniform, and making the overall light output of the light output surface 11 of the light guide plate 1 more uniform.
[0035] In one embodiment, Figure 3 or Figure 4As shown, the first reflective structure 22 includes a plurality of reflective protrusions 221, and the plurality of reflective protrusions 221 are arranged at intervals along the length direction of the light guide cylinder 2. Specifically, the reflective protrusions 221 refer to a protruding structure with a certain height dimension relative to the first reflective surface 21, and the reflective protrusions 221 can be hemispherical, long strip, cylindrical or any other shape. The surface shape of the light guide cylinder 2 at the reflective protrusions 221 can be changed by setting the reflective protrusions 221, so that the light is reflected when passing through the reflective protrusions 221 during the light transmission process, and the reflected light will diffuse to various angles and then destroy the reflection condition and be emitted from the portion of the light guide cylinder 2 close to the light incident surface 12 of the light guide plate 1. At the same time, the plurality of reflective protrusions 221 are arranged at intervals along the length direction of the light guide cylinder 2, so that the light of the light guide cylinder 2 is reflected and emitted from the light guide cylinder 2 along the length direction, so that the light emitted from the light guide cylinder 2 along its own length direction is more uniform. The first reflective structure 22 is in the form of a reflective protrusion 221 , which can make the overall structure of the light guide cylinder 2 simpler and make the processing and manufacturing of the light guide cylinder 2 more convenient.
[0036] Based on the above-mentioned characteristic reflective protrusion 221, as Figure 4 or Figure 5 As shown, the reflective protrusion 221 includes reflective ribs, and the reflective ribs are all arranged in a direction perpendicular to the length of the light guide cylinder 2. Specifically, the reflective ribs refer to a convex structure with a certain length, and by arranging a plurality of reflective ribs at intervals along the length of the light guide cylinder 2, and the reflective ribs themselves are all arranged in a direction perpendicular to the length of the light guide cylinder 2, the light can be reflected and the strength of the light guide cylinder 2 can be enhanced. In addition, the length of the reflective ribs themselves is arranged in a direction perpendicular to the length of the light guide cylinder 2, and the reflection range of the light can be increased by the length of the reflective ribs themselves, thereby increasing the luminous flux of the outgoing light of the light guide cylinder 2 in the direction perpendicular to the length of the light guide cylinder 2, making the use of the entire light guide cylinder 2 more convenient.
[0037] It should be noted that the light guide column 2 is generally arranged parallel to the light guide plate 1, the length direction of the light guide column 2 is consistent with the length or width direction of the light guide plate 1, and the direction perpendicular to the length of the light guide column 2 generally refers to the thickness direction along the light guide plate 1, that is, the direction perpendicular to the light emitting surface 11 of the light guide plate 1.
[0038] As another embodiment of the first light reflecting structure 22, Figure 6As shown, the first reflective structure 22 includes a plurality of sawtooth structures 222, and the sawtooth structures 222 are arranged in sequence along the length direction of the light guide cylinder 2. Specifically, the sawtooth structure 222 refers to a structure composed of a plurality of pointed protrusions arranged in sequence, and the arrangement of the sawtooth structure 222 can change the surface shape of the light guide cylinder 2 at the sawtooth structure 222, so that the light is reflected when passing through the sawtooth structure 222 during the light transmission process, and the reflected light will diffuse to various angles and then destroy the reflection condition and be emitted from the light guide cylinder 2 from the portion of the light guide cylinder 2 close to the light incident surface 12 of the light guide plate 1, thereby finally achieving the purpose of light reflection.
[0039] In one embodiment, Figure 4 As shown, the light guide cylinder 2 also includes an arc surface 23, which is connected to the first reflective surface 21 end to end to form a closed figure, and the radius of the arc surface 23 matches the thickness of the light guide plate 1. Specifically, the arc surface 23 refers to a curved surface structure that is curved along a certain radius. The arc surface 23 can be a major arc or a minor arc. The arc surface 23 is generally used as the light-emitting side of the light guide cylinder 2. In order to ensure that the area of the light-emitting side on the light guide cylinder 2 is sufficient, the arc surface 23 is generally a major arc. A first reflective surface 21 is provided on the circumference of the light guide cylinder 2. Part of the light inside the light guide cylinder 2 can be emitted from the arc surface 23 of the light guide cylinder 2 after being reflected by the first reflective structure 22 on the first reflective surface 21, so that the reflected light can be emitted from the light guide cylinder 2 from multiple directions, thereby increasing the angle of the reflected light emission, so that the light guide cylinder 2 can simulate the irradiation direction of the light emitted by the natural light source, thereby making the use of the light-emitting panel more convenient.
[0040] In one embodiment, Figure 2 As shown, the light guide plate 1 has a second reflective surface 13 arranged opposite to the light emitting surface 11, and a second reflective structure 14 is arranged on the second reflective surface 13. Specifically, the second reflective surface 13 refers to a planar structure with a certain area. The second reflective structure 14 can be a microstructure arranged on the second reflective surface 13, such as convex points, concave pits or other structures that can reflect light; the second reflective structure 14 can also reflect light in the form of ink dots arranged on the second reflective surface 13. The arrangement of the second reflective surface 13 can make the arrangement and processing of the second reflective structure 14 more convenient. At the same time, the second reflective surface 13 is arranged on the light guide plate 1 and the second reflective structure 14 is arranged on the second reflective surface 13. The light in the light guide plate 1 can be reflected by the second reflective structure 14, so that the light can be emitted from the light emitting surface 11 of the light guide plate 1.
[0041] Based on the above-mentioned characteristic second reflecting surface 13, as Figure 2As shown, the second reflective structure 14 includes a plurality of reflective convex points 141 disposed on the second reflective surface 13, and the reflective convex points 141 are evenly distributed on the second reflective surface 13. Specifically, the reflective convex points 141 refer to a convex point structure with a certain height, and a plurality of reflective convex points 141 are evenly arranged on the second reflective surface 13. Among them, the reflective convex points 141 can be arranged in an array on the second reflective surface 13. The provision of the reflective convex points 141 can change the surface shape of the light guide plate 1 at the reflective convex points 141, so that the light is reflected when passing through the reflective convex points 141 during the light transmission process, and the reflected light will diffuse to various angles and then destroy the reflection conditions and emit the light guide plate 1 from the light exit surface 11 of the light guide plate 1. The second reflective structure 14 adopts a plurality of reflective convex points 141, which can make the processing and manufacturing of the light guide plate 1 more convenient.
[0042] In one embodiment, Figure 1 and Figure 2 As shown, the light-emitting panel also includes a diffusion plate 4, which is arranged on the outside of the light-emitting surface 11 along the light propagation path. Specifically, the diffusion plate 4 is a physical phenomenon of refraction, reflection and scattering that occurs when light encounters two media with different refractive indices during its travel, by chemical or physical means, by adding inorganic or organic light diffusers to substrates such as PMMA (Polymethyl Methacrylate), PC (Polycarbonate), PP (Polypropylene), or by artificially adjusting the light through an array arrangement of micro-feature structures on the surface of the substrate, so that the light is refracted, reflected, and scattered in different directions, thereby changing the travel path of the light, achieving sufficient dispersion of the incident light to produce an optical diffusion effect. The diffusion plate 4 is usually a plate-like structure with a certain thickness, and the diffusion plate 4 can be against the light-emitting surface 11 of the light guide plate 1, or can be spaced apart from the light guide plate 1. By arranging the diffusion plate 4 outside the light emitting surface 11 along the light propagation path, the light will be diffused by the diffusion plate 4 after being emitted from the light emitting surface 11 of the light guide plate 1, so that the light can be softer and more uniform.
[0043] In a second aspect, a display module is provided, comprising any one of the above-mentioned light-emitting panels.
[0044] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.
[0045] The above description is only a preferred embodiment of the utility model, and only specifically describes the technical principle of the utility model. These descriptions are only for explaining the principle of the utility model and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanation here, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model, and other specific implementation methods of the utility model that can be associated with the technicians in this field without creative labor, should be included in the protection scope of the utility model.
Claims
1. A light-emitting panel, characterized in that: The invention comprises a light guide plate, a light guide column and a light source, wherein the light guide plate has a light emitting surface and a light incident surface; the light guide column is located at the light incident side of the light guide plate, the light source is arranged at the end of the light guide column, the light guide column has a first light reflecting structure arranged along the length direction of the light guide column, and the first light reflecting structure is used to reflect the light in the light guide column so that the light emitted through the light guide column can enter the light guide plate from the light incident surface.
2. The light emitting panel according to claim 1, wherein: The light guide column includes a first reflecting surface, which is arranged along the length direction of the light guide column, the first reflecting surface is located on the side of the light guide column opposite to the light incident surface, the first reflecting surface is parallel to the light incident surface, and the first reflective structure is arranged on the first reflecting surface.
3. The light emitting panel according to claim 2, characterized in that: The first reflective structure includes a plurality of reflective protrusions, and the plurality of reflective protrusions are arranged at intervals along the length direction of the light guide column.
4. The light emitting panel according to claim 3, characterized in that: The reflective protrusion includes a reflective convex rib, and the reflective convex rib is arranged along a direction perpendicular to the length of the light guide column.
5. The light emitting panel according to claim 2, wherein: The first light reflecting structure includes a plurality of sawtooth structures, and the sawtooth structures are sequentially arranged at intervals along the length direction of the light guide cylinder.
6. The light emitting panel according to claim 2, characterized in that: The light guide column further includes an arcuate surface, which is connected end to end with the first reflective surface to form a closed figure, and the radius of the arcuate surface matches the thickness of the light guide plate.
7. The light emitting panel according to any one of claims 1 to 6, characterized in that: The light guide plate has a second reflective surface arranged opposite to the light emitting surface, and a second light reflecting structure is arranged on the second reflective surface.
8. The light emitting panel according to claim 7, characterized in that: The second light-reflecting structure includes a plurality of reflective convex points arranged on the second reflective surface, and the reflective convex points are evenly distributed on the second reflective surface.
9. The light emitting panel according to any one of claims 1 to 6, characterized in that: The light emitting panel further includes a diffusion plate, and the diffusion plate is arranged on the light emitting side of the light guide plate.
10. A display module, characterized in that: The invention comprises a light emitting panel as claimed in any one of claims 1 to 9.