Light guide plate capable of improving bright edge of light emitting side

Abstract

The utility model relates to the technical field of light guide plates, and discloses a light guide plate capable of improving a bright edge of a light emitting side, which comprises a plate body, and the plate body is provided with a first lattice point set and a plurality of second lattice point sets; wherein the first net point set comprises a plurality of first net points, the plurality of first net points form a first net point area on the light guide plate, the second net point set comprises a plurality of second net points, the second net points in each second net point set form a second net point area on the light guide plate, and the light guide plate is provided with a light inlet side and a light outlet side. The multiple second lattice point areas are sequentially adjacent in pairs in the direction from the light inlet side to the light outlet side, and the lattice point density of the multiple second lattice point areas in the direction from the light inlet side to the light outlet side is gradually increased. The density of the second lattice points is gradually increased from the light-in side to the light-out side of the light guide plate, the increasing degree of the density of the lattice points is larger when the density is closer to the light-out side, and the light utilization rate of the light-out side is reduced, so that the bright edge condition of the light-out side is improved, and the light-out quality of the light guide plate is ensured.

Description

Technical Field

[0001] This application relates to the technical field of light guide plates, and particularly to a light guide plate capable of improving the bright edge on the light-emitting side. Background Art

[0002] With the development trend of narrow borders and thinning of LCD (Liquid Crystal Display), the effective display area (AA) in the BLU (Backlight Module) is getting smaller and smaller, and the bright edge on the light-emitting side becomes more and more obvious, making it more and more difficult to improve. Ordinary improvement methods can no longer solve the problem, resulting in the phenomenon of bright edges on the light-emitting side often appearing in the light guide plate. Summary of the Invention

[0003] The purpose of this application is to provide a light guide plate capable of improving the bright edge on the light-emitting side. By gradually increasing the dot density from the light-incident side to the light-emitting side of the light guide plate, the closer to the light-emitting side, the greater the degree of increase in the dot density, thereby reducing the light utilization rate on the light-emitting side and improving the bright edge phenomenon on the light-emitting side.

[0004] In order to achieve the above purpose, the technical solution adopted is as follows:

[0005] A light guide plate capable of improving the bright edge on the light-emitting side, the light guide plate includes a plate body, and a first dot set and a plurality of second dot sets are arranged on the plate body; wherein, the first dot set includes a plurality of first dots, the plurality of first dots form a first dot area on the light guide plate, the second dot set includes a plurality of second dots, the second dots in each second dot set form a second dot area on the light guide plate, the light guide plate has a light-incident side and a light-emitting side, and the plurality of second dot areas are adjacent to each other in turn along the direction from the light-incident side to the light-emitting side, and the dot density of the plurality of second dot areas along the direction from the light-incident side to the light-emitting side gradually increases.

[0006] Preferably, in the above light guide plate capable of improving the bright edge on the light-emitting side, the areas of the respective second dot areas are equal.

[0007] Preferably, in the above light guide plate capable of improving the bright edge on the light-emitting side, the plurality of second dots in each second dot area are evenly distributed.

[0008] Preferably, in the above light guide plate capable of improving the bright edge on the light-emitting side, the plurality of first dots in the first dot area are evenly distributed or randomly distributed.

[0009] Preferably, in the above light guide plate capable of improving the bright edge on the light-emitting side, the diameters of the respective second dots in the same second dot set are equal.

[0010] Preferably, in the above light guide plate capable of improving the bright edge on the light-emitting side, the diameters of the second dots in different second dot sets are not equal.

[0011] The beneficial effects of the present application are as follows:

[0012] By optimizing the layout of the dot patterns in the light guide plate, the present application gradually increases the density of the second dot patterns from the light incident side to the light exit side of the light guide plate. The closer to the light exit side, the greater the degree of increase in the dot pattern density, reducing the light utilization rate on the light exit side, thereby improving the situation of the bright edge on the light exit side and ensuring the light output quality of the light guide plate. Brief Description of the Drawings

[0013] Figure 1 Shows a structural diagram of a light guide plate capable of improving the bright edge on the light exit side according to an embodiment of the present application.

[0014] Figure 2 Shows a structural diagram of a light guide plate with a bright edge on the light exit side according to the prior art.

[0015] Figure 3 Shows a schematic diagram of the light output efficiency of a light guide plate capable of improving the bright edge on the light exit side according to an embodiment of the present application.

[0016] Figure 4 Shows a schematic diagram of the light output efficiency of a light guide plate with a bright edge on the light exit side according to the prior art.

[0017] Reference Signs:

[0018] 100, plate body; 110, first dot pattern set; 111, first dot pattern; 120, second dot pattern set; 121, second dot pattern; 130, first dot pattern area; 140, second dot pattern area; 150, light incident side; 160, light exit side; 200, bright edge area. Detailed Description of the Embodiments

[0019] The following specific examples illustrate the embodiments of the present application. Those skilled in the art can easily understand 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, and various 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, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0020] The following further describes in detail the specific embodiments of the present application in conjunction with the drawings and embodiments.

[0021] The light guide plate is made of optical-grade acrylic / PC plates, and then a high-tech material with extremely high refractive index and non-light-absorbing properties is used. On the bottom surface of the optical-grade acrylic plate, dots (or light guide points) are printed using laser engraving, V-shaped cross-grid engraving, and UV screen printing techniques. The optical-grade acrylic plate is used to absorb the light emitted from the lamp and keep it on the surface of the optical-grade acrylic plate. When the light hits each dot, the reflected light will spread in all directions, and then the reflection condition is destroyed and the light is emitted from the front of the light guide plate. Through various dots with different densities and sizes, the light guide plate can emit light evenly. The purpose of the reflective sheet is to reflect the light exposed on the bottom surface back into the light guide plate to improve the light use efficiency; under the condition of the same luminous brightness per unit area, the luminous efficiency is high and the power consumption is low. The single-sided micro-structured array light guide plate generally adopts an extrusion molding process.

[0022] The dots on the light guide plate play a crucial role in the design and application of the light guide plate. They optimize the light distribution and brightness through specific designs, thereby enhancing the visual effect of the display device. The dots on the light guide plate can be random or uniform. Currently, the randomly distributed light guide dot design is the most common. The random distribution method can provide a more uniform light distribution in the application of the light guide plate and reduce the visual non-uniformity.

[0023] Currently, when there is a bright edge phenomenon on the light-emitting side of the light guide plate (that is, there are some areas on the light-emitting side where the brightness is significantly brighter than other areas, resulting in uneven light emission), common improvement methods, such as increasing the reflective tape, etc., cannot well improve the bright edge phenomenon on the light-emitting side.

[0024] Based on this, the embodiments of the present application provide a light guide plate capable of improving the bright edge on the light-emitting side. By changing the dot layout of the light guide plate, the bright edge phenomenon on the light-emitting side of the light guide plate can be improved or even eliminated. Figure 1 The structural diagram of a light guide plate capable of improving the bright edge on the light-emitting side according to an embodiment of the present application is shown. As Figure 1 shown, the light guide plate includes a plate body 100, and a first dot set 110 and a plurality of second dot sets 120 are arranged on the plate body 100; wherein, the first dot set 110 includes a plurality of first dots 111, and the plurality of first dots 111 form a first dot area 130 on the plate body 100. The second dot set 120 includes a plurality of second dots 121, and the second dots 121 in each second dot set 120 form a second dot area 140 on the plate body 100. The plate body 100 has a light-incident side 150 and a light-emitting side 160. The plurality of second dot areas 140 are adjacent to each other in turn along the direction from the light-incident side 150 to the light-emitting side 160, and the dot density gradually increases in the plurality of second dot areas 140 in the direction from the light-incident side 150 to the light-emitting side 160.

[0025] In this embodiment, the light guide plate capable of improving the bright edge on the light-emitting side is obtained by improving the existing light guide plate that has a bright edge on the light-emitting side. Figure 2 The structural diagram of a light guide plate with a bright edge on the light-emitting side according to the prior art is shown, as Figure 2 shown, a bright edge area 200 appears on the light-emitting side of the light guide plate. According to this bright edge area 200, a number of second dot areas 140 are marked out on the light guide plate, and each of the second dot areas 140 is adjacent to each other in turn along the direction from the light-incident side 150 to the light-emitting side 160. Among them, the length of the second dot area 140 is determined according to the length of the bright edge area 200. The length of the second dot area 140 is at least greater than the length of the bright edge area 200, and the width of the second dot area 140 is determined according to the length L of the light guide plate. For example, in the case of dividing n second dot areas 140, the width of the second dot area 140 is equal to L / n, so the areas of the divided second dot areas 140 are equal. Subsequently, the dot density in the second dot area 140 is readjusted, that is, the number of the second dots 121 in the second dot area 140 is adjusted. The basic idea of the adjustment is that as the dot density increases, the light utilization rate decreases, and when the light utilization rate decreases, the light-emitting brightness will decrease. Therefore, in this application, the number of the second dots 121 included in a plurality of second dot areas 140 in the direction from the light-incident side 150 to the light-emitting side 160 of the plate body 100 can be gradually increased, so that the dot density is gradually increased, and the closer to the light-emitting side 160, the greater the increase in the dot density, so as to effectively solve the problem of the bright edge on the light-emitting side while ensuring the overall light-emitting uniformity.

[0026] It should be noted that the first dot area 130 and the second dot area 140 described herein refer to the areas that actually exist on the plate body 100. Only the first dots 111 exist in the first dot area 130, and only the second dots 121 exist in the second dot area 140. In the actual production and manufacturing process of the light guide plate, the division of the first dot area 130 and the second dot area 140 is reflected in the dot layout design of the light guide plate. However, in the actually produced light guide plate, the first dot area 130 and the second dot area 140 are not divided out, and they are reflected by the dot layout. That is, in the actual light guide plate product, there is no such Figure 1 dotted lines for indicating the first dot area 130 and the second dot area 140. The description of the first dot area 130 and the second dot area 140 is introduced in this application to clearly describe the dot layout of the light guide plate designed in this application.

[0027] As Figure 3 and Figure 4 shown, they are the light-emitting efficiency test diagrams respectively carried out according to the light guide plate structures shown in Figure 1 and Figure 2 shown. In Figure 3 andFigure 4 In this case, the abscissa represents the position of the test points. Along the abscissa direction, the test points gradually approach the light-emitting side, and the ordinate represents the light-emitting efficiency of the test points. As Figure 4 shown, in the light guide plate with the bright edge phenomenon, the light-emitting efficiency on the light-emitting side is significantly higher, so the bright edge phenomenon will occur. After improvement, as Figure 3 shown, the light-emitting efficiency on the light-emitting side is effectively reduced, and the bright edge phenomenon on the light-emitting side is improved.

[0028] In an exemplary embodiment, multiple second dots 121 in each second dot area 140 are evenly distributed.

[0029] In this embodiment, for second dot areas 140 of the same size, the second dots 121 inside them are in a uniformly distributed form. That is, according to the size of the bright edge area 200, multiple second dot areas 140 of the same size are set as the modified areas. In this modified area, the second dots 121 are in a uniformly distributed form. When reflected on the entire plate body 100, all the dots on the plate body 100 are randomly distributed, but uniformly distributed in a local area.

[0030] In an exemplary embodiment, multiple first dots 110 in the first dot area 130 are evenly distributed or randomly distributed.

[0031] In this embodiment, the distribution mode of the first dots 110 is the existing dot distribution of the light guide plate. For example, when Figure 2 performing dot layout on the light guide plate shown, the first dot area 130 formed by the first dots 110 is not adjusted because the existing light guide plate itself has good light-emitting uniformity, but only has the bright edge phenomenon. If the dot distribution is adjusted as a whole to improve the bright edge, the workload will be greatly increased. Therefore, in this application, by adjusting the local dots, the workload can be reduced, and the bright edge phenomenon on the light-emitting side can be effectively improved.

[0032] In an exemplary embodiment, the diameters of the second dots 121 in the same second dot set 120 are equal; the diameters of the second dots 121 in different second dot sets 120 are not equal.

[0033] In this embodiment, each second dot set 120 corresponds to form a second dot area 140. When adjusting the dot density of each second dot area 140, the adjustment can be achieved by adjusting the sizes of the second dots 121 in different second dot areas 140.

[0034] Understandably, the method of adjusting the dot density of each second dot area 140 can also be that the size of the second dot 121 remains unchanged, only the spacing between each second dot 121 is changed, or both the size of the second dot 121 and the spacing between each second dot 121 are changed.

[0035] The above embodiments are only used to illustrate the present application and are not intended to limit the present application. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions also belong to the scope of the present application. The patent protection scope of the present application shall be defined by the claims.

Claims

1. A light guide plate capable of improving the bright edge on the light output side, characterized in that, The light guide plate includes a plate body, and a first dot set and a plurality of second dot sets are arranged on the plate body; wherein, the first dot set includes a plurality of first dots, and the plurality of first dots form a first dot area on the light guide plate, the second dot set includes a plurality of second dots, and the second dots in each second dot set form a second dot area on the light guide plate, the light guide plate has a light incident side and a light exit side, and the plurality of second dot areas are adjacent to each other in sequence two by two along the direction from the light incident side to the light exit side, and the dot density of the plurality of second dot areas along the direction from the light incident side to the light exit side gradually increases.

2. The light guide plate capable of improving the bright edge on the light-emitting side according to claim 1, wherein The areas of the respective second dot areas are equal.

3. The light guide plate capable of improving the bright edge on the light-emitting side according to claim 1, wherein The plurality of second dots in each second dot area are evenly distributed.

4. The light guide plate capable of improving the bright edge on the light-emitting side according to claim 1, characterized in that, The plurality of first dots in the first dot area are evenly distributed or randomly distributed.

5. The light guide plate capable of improving the bright edge on the light output side according to claim 1, characterized in that, The diameters of the respective second dots in the same second dot set are equal.

6. The light guide plate capable of improving the bright edge on the light-emitting side according to claim 5, characterized in that, The diameters of the second dots in different second dot sets are not equal.

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