Light guide plate for improving bright edge of light reflecting side
By adjusting the dot density of the light guide plate and using reflective tape, the problem of bright sides of the LCD panel inverted light is solved, achieving higher picture quality and user experience.
Patent Information
- Application Number
- CN202422434217.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The prior art cannot completely eliminate the bright edge phenomenon of the liquid crystal panel inverting into the light side, affecting the picture quality and user experience, especially in the trend of thinner and narrower frames, the problem is more significant.
By adjusting the dot density on the light guide plate and combining the use of reflective tape, the dot density on the reverse light side is reduced, and reflective tape is attached to the reverse light side to eliminate the bright edge phenomenon.
The bright edges of the inverted light side are completely eliminated, which improves the picture quality and user experience, and maintains light uniformity.
Smart Images
Figure CN223205690U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of light guide plates, and in particular to a light guide plate with an improved bright edge on the side reflecting incident light. Background Art
[0002] The current trend in LCD panel development is towards thinner and narrower bezels, placing stricter demands on the appearance of the light guide plate (LGP) edges. This is particularly true for the bright edge phenomenon on the side where light is reflected, a common phenomenon under backlighting. Modifying this bright edge primarily relies on adjusting the dot density. Currently, dot density adjustment alone cannot completely resolve this phenomenon, nor can it fundamentally solve it. It can only improve it. For narrow-bezel models, this bright edge phenomenon can degrade image quality and result in a poor user experience. Summary of the Invention
[0003] The purpose of this application is to provide a light guide plate with improved bright edge on the reflected light side, so as to completely eliminate the bright edge phenomenon on the reflected light side, improve picture quality, and enhance user experience.
[0004] In order to achieve the above purpose, the technical solutions adopted are as follows:
[0005] A light guide plate with improved bright edge on the side reflecting light incident, the light guide plate comprising a plate body, the plate body specifically having opposite light incident side and light reflecting side, a first dot group and a second dot group being arranged on the plate body; wherein the first dot group comprises a plurality of first dots adjacent to each other, the second dot group comprises a plurality of second dots adjacent to each other, the plurality of first dots adjacent to each other form a first dot area, the plurality of second dots adjacent to each other form a second dot area, the dot density of the first dot area is greater than the dot density of the second dot area, and reflective tape is affixed to the side reflecting light incident.
[0006] Preferably, in the above-mentioned light guide plate with improved bright edge on the light-reflecting side, the plurality of first mesh dots in the first mesh dot area are evenly distributed.
[0007] Preferably, in the above-mentioned light guide plate with improved bright edge on the light-reflecting side, the plurality of second mesh dots in the second mesh dot area are evenly distributed.
[0008] Preferably, in the above-mentioned light guide plate with improved bright edge on the side reflecting incident light, the plate body has a first surface and a second surface relative to each other, wherein the first surface is the light emitting surface, one end of the reflective tape is in contact with the first surface, and the reflective tape is not in contact with the second surface.
[0009] Preferably, in the above-mentioned light guide plate with improved bright edge on the side reflecting incident light, the distance between the reflective tape and the second surface is 0.3±0.2 mm.
[0010] Preferably, in the above-mentioned light guide plate with improved bright edge on the light-reflecting side, the distance between the center of the second halftone dot area and the light-reflecting side is 2-5 mm.
[0011] Preferably, in the above-mentioned light guide plate with improved bright edge on the light-reflecting side, the distance between the center of the second halftone dot area and the light-reflecting side is 3 mm.
[0012] The beneficial effects of this application are:
[0013] This application combines the two adjustment methods of dot adjustment and adding reflective tape by reducing the dot density value near the reflected light side and combining it with the method of attaching reflective tape on the reflected light side, thereby improving and eliminating the bright edge phenomenon on the reflected light side, ensuring light uniformity, high picture quality, and greatly improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The structure of a light guide plate with a bright edge on the light-reflecting side according to the prior art is shown.
[0015] Figure 2 A structural diagram of a light guide plate with improved bright edge on the light-reflecting side according to an embodiment of the present application is shown.
[0016] Figure 3 A schematic diagram of the light incident side of a light guide plate with improved bright edge on the side reflecting the light incident according to an embodiment of the present application is shown.
[0017] Reference numerals:
[0018] 100, plate body; 110, light incident side; 120, anti-light incident side; 130, first dot group; 131, first dot; 140, second dot group; 141, second dot; 150, first dot area; 160, second dot area; 170, first surface; 180, second surface; 200, reflective tape. DETAILED DESCRIPTION
[0019] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.
[0020] The specific implementation of the present application is further described in detail below with reference to the accompanying drawings and examples.
[0021] Light guide plates (LGPs) are made from optical-grade acrylic or PC sheets. Dots (or light guide dots) are printed on the bottom surface of the optical-grade acrylic using laser engraving, V-shaped cross-grid engraving, and UV screen printing, using a high-tech material with an extremely high refractive index and no light absorption. The optical-grade acrylic sheet absorbs light from the lamp where it remains on the surface. When light strikes the dots, the reflected light diffuses in all directions, disrupting the reflective conditions and exiting through the front of the LGP. The varying density and size of the dots ensures uniform illumination from the LGP. A reflective sheet is used to reflect light from the bottom surface back into the LGP, improving light efficiency. For a given area, the LGP achieves high luminous efficiency and low power consumption. Single-sided microstructured array LGPs are typically manufactured using an extrusion process.
[0022] Figure 1 FIG. 1 shows a light guide plate with a bright edge on the side reflecting light according to the prior art. Figure 1 The light guide plate shown is a side-lit light guide plate. Figure 1 The light guide plate is shown as the light emitting surface. The light guide plate has a light incident side and a light reflecting side. The light incident side receives light and the light reflecting side emits light. The light guide plate is provided with mesh points. The light entering through the light incident side will be reflected by each mesh point, with part of the light being emitted from the light emitting surface and the rest being emitted from the light reflecting side. Figure 1 When the light guide plate of the structure shown is assembled in the backlight module, it will have a noticeable bright edge on the side where light is reflected, thus affecting the image quality. How to eliminate the bright edge phenomenon on the side where light is reflected in the existing light guide plate is a technical problem that needs to be solved urgently.
[0023] Based on this, the embodiment of the present application provides a light guide plate with improved bright edge on the side of reflected light, the light guide plate with improved bright edge on the side of reflected light is based on the following Figure 1 The light guide plate shown is improved by adjusting the dot layout and adding reflective tape to eliminate the bright edge phenomenon on the side where light is reflected.
[0024] The technical idea of the present application is to divide a dot modification area on the light guide plate near the light-reflecting side in the case of an existing dot layout of the light guide plate, and adjust the dot density in the divided dot modification area, while adding reflective tape on the light-reflecting side, so as to eliminate the bright edge phenomenon on the light-reflecting side. The dot density in the dot modification area is lowered, and the lower the dot density, the lower the light utilization rate. Due to the addition of the reflective tape, the light that should normally be emitted from the light-reflecting side will be reflected back, and the dot modification area is processed corresponding to the light reflected back by the reflective tape. The light at the dot modification area will cause the light in this area to be enhanced due to the reflected light of the reflective tape, so the dot density is lowered, and the light utilization rate is reduced so that it can maintain the original light output efficiency, that is, the light output uniformity of the entire light guide plate will not be affected, and the bright edge will also be eliminated due to the addition of the reflective tape.
[0025] Based on the above technical ideas, this application designs a light guide plate that improves the bright edge of the reflected light side. Figure 2 and Figure 3 The structure diagram of a light guide plate for improving the bright edge on the light-reflecting side and the schematic diagram of the light-incident side are shown respectively. Figure 2 and Figure 3 As shown, the light guide plate includes a plate body 100, and the plate body 100 specifically has a light incident side 110 and a light reflecting side 120 opposite to each other, and a first dot group 130 and a second dot group 140 are set on the plate body 100; wherein, the first dot group 130 includes a plurality of first dots 131 adjacent to each other, and the second dot group 140 includes a plurality of second dots 141 adjacent to each other, and the plurality of first dots 131 adjacent to each other form a first dot area 150, and the plurality of second dots 141 adjacent to each other form a second dot area 160, the dot density of the first dot area 150 is greater than the dot density of the second dot area 160, and the light reflecting side 120 is attached with a reflective tape 200.
[0026] It should be noted that the first dot area 150 and the second dot area 160 described in this article refer to areas that actually exist on the plate body 100. There are only first dots 111 in the first dot area 150, and there are only second dots 121 in the second dot area 160. In the process of producing the light guide plate, the division of the first dot area 150 and the second dot area 160 is reflected in the dot layout design of the light guide plate. For example, the first dot area 150 and the second dot area 160 are divided in the template diagram that guides the production of the light guide plate, and the template diagram can be exported by mature light guide plate dot design software (such as Gtools software) in this technical field. However, in the light guide plates actually produced, the first dot area 150 and the second dot area 160 are not divided, but are reflected by the dot layout, that is, in the actual light guide plate product, there is no such division. Figure 1 The dotted lines in FIG. 1 are used to indicate the first dot area 150 and the second dot area 160. The description of the first dot area 150 and the second dot area 160 is introduced in this application to clearly describe the dot layout of the light guide plate designed in this application.
[0027] The principle of eliminating the bright edge on the light-reflecting side of the light guide plate provided in this embodiment is as follows:
[0028] For a light guide plate that has a bright edge only on the light-reflecting side 120, the light entering the plate body 100 through the light-entering side 110 is uniformly emitted from the light-emitting surface itself, and the first dots 131 in the first dot area 150 are not adjusted. Therefore, the light emitted from the first dot area 150 is uniform. Since the reflective tape 200 is attached to the light-reflecting side 120, part of the light emitted from the light-reflecting side 120 is reflected, thereby eliminating the bright edge phenomenon. However, the reflected light will return to the plate body 100. Therefore, the present application modifies the dot density of the area where the reflected light is to be emitted, that is, the second dot area 160 is relatively uniform with respect to the existing light guide plate (i.e., Figure 1 The dot modification area of the light guide plate (illustrated in FIG. 1 ) is adjusted by reducing the dot density of the second dot area 160, that is, making the dot density of the second dot area 160 smaller than that of the first dot area 150, thereby reducing the light utilization rate of the second dot area 160. Therefore, while the optical signal in the second dot area 160 is enhanced due to the superposition of reflected light and original incident light, the second dot area 160 can still maintain the same light output efficiency as before the modification, ensuring overall light output uniformity. Therefore, the present application can eliminate the bright edge phenomenon on the side opposite to the incident light while maintaining the original light output uniformity.
[0029] In an exemplary embodiment, Figure 2 As shown, the plurality of first mesh dots 131 in the first mesh dot area 150 are evenly distributed.
[0030] It is understood that the distribution of the first dots 131 in the first dot area 150 includes but is not limited to a uniform distribution, and can also be a random distribution. In addition, the sizes of the first dots 131 can be consistent or inconsistent. Figure 3 The sizes of the first dots 131 shown are consistent, but this does not constitute a limitation to the present application. In some embodiments, the sizes of the first dots 131 may be inconsistent, for example, the sizes of all the first dots 131 are different or the sizes of a part of the first dots 131 are consistent, etc.
[0031] In an exemplary embodiment, Figure 2 As shown, the plurality of second mesh dots 141 in the second mesh dot area 160 are evenly distributed.
[0032] It is understood that the distribution of the second dots 141 in the second dot area 160 includes but is not limited to a uniform distribution, and can also be a random distribution. In addition, the sizes of the second dots 141 can be consistent or inconsistent, although Figure 2 The sizes of the second dots 141 shown are consistent, but this does not constitute a limitation to the present application. In some embodiments, the sizes of the second dots 141 may be inconsistent, for example, the sizes of all the second dots 141 are different or the sizes of a part of the second dots 141 are consistent, etc.
[0033] In an exemplary embodiment, the specific position of the second dot area 160 is provided, and the distance between the center of the second dot area 160 and the light reflecting side 120 can be 2-5 mm. Figure 3 As shown, the distance between the center of the second screen dot area 160 and the light reflecting side 120 is preferably 3 mm.
[0034] In an exemplary embodiment, Figure 3 As shown, the board 100 has a first surface 170 and a second surface 180 relative to each other, wherein the first surface 170 is a light-emitting surface and the second surface 180 is a backlight surface. One end of the reflective tape 200 contacts the first surface 170 , and the reflective tape does not contact the second surface 180 .
[0035] In this embodiment, the reflective tape 200 is in contact with the light-emitting surface but not in contact with the backlight surface, thereby reducing the intensity of the light signal on the light-reflecting side close to the light-emitting surface and completely eliminating the bright edge phenomenon as much as possible.
[0036] Exemplarily, the distance between the reflective tape 200 and the second surface is 0.3±0.2 mm.
[0037] The above implementation modes are only used to illustrate the present application and are not intended to limit the present application. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions also fall within the scope of the present application, and the scope of patent protection of the present application shall be defined by the claims.
Claims
1. A light guide plate with improved bright edge on the side reflecting incident light, the light guide plate comprising a plate body, wherein the plate body has a light incident side and a light reflecting side opposite to each other, characterized in that: A first dot group and a second dot group are provided on the plate; wherein, the first dot group includes a plurality of first dots adjacent to each other, and the second dot group includes a plurality of second dots adjacent to each other, the plurality of first dots adjacent to each other form a first dot area, and the plurality of second dots adjacent to each other form a second dot area, the dot density of the first dot area is greater than the dot density of the second dot area, and a reflective tape is attached to the light-reflecting side.
2. The light guide plate with improved bright edge on the light-reflecting side according to claim 1, wherein: The plurality of first mesh dots in the first mesh dot area are evenly distributed.
3. The light guide plate with improved bright edge on the light-reflecting side according to claim 1, wherein: The plurality of second mesh dots in the second mesh dot area are evenly distributed.
4. The light guide plate with improved bright edge on the light-reflecting side according to claim 1, wherein: The plate body has a first surface and a second surface opposite to each other, wherein the first surface is a light emitting surface, one end of the reflective tape contacts the first surface, and the reflective tape does not contact the second surface.
5. The light guide plate with improved bright edge on the light-reflecting side according to claim 4, wherein: The distance between the reflective tape and the second surface is 0.3±0.2 mm.
6. The light guide plate with improved bright edge on the light-reflecting side according to claim 1, wherein: The distance between the center of the second halftone dot area and the light-reflecting side is 2-5 mm.
7. The light guide plate with improved bright edge on the light-reflecting side according to claim 1, wherein: The distance between the center of the second halftone dot area and the light-reflecting side is 3 mm.