Light guide plate, Mini LED backlight source, display device and mobile terminal

Abstract

The utility model relates to the technical field of Mini LED backlight sources, and particularly provides a light guide plate, a Mini LED backlight source, a display device and a mobile terminal, and the light guide plate comprises a light guide body which is provided with a light incoming surface and a light outgoing surface which are oppositely arranged, and a side peripheral surface connected to the light incoming surface and the light outgoing surface; and the plurality of convex lens grooves are formed in the light incident surface, and the plurality of convex lens grooves are used for covering the Mini LEDs in a one-to-one correspondence manner. According to the light guide plate, a plurality of convex lens grooves used for covering Mini LEDs in a one-to-one correspondence mode are formed in the light incident face of the light guide body, so that scattered light emitted by the Mini LEDs is refracted through the convex lens grooves, the angle of the light is reduced, the light is emitted out in the direction perpendicular to the backlight emitting direction, it is avoided that the light enters the side circumferential face of the light guide body, and the light guide effect is improved. The light emitted by the Mini LED can be effectively utilized, and the brightness of the surface of the backlight source is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of Mini LED backlight, in particular to a light guide plate, a Mini LED backlight, a display device and a mobile terminal. BACKGROUND

[0002] In the design of Mini LED backlight, the scattered light emitted by the Mini LED is uniformly dispersed through the light guide plate. However, part of the light will be shot to the edge area when passing through the diffusion plate, resulting in that part of the light cannot be effectively utilized, causing light energy loss, and finally leading to that the brightness of the backlight cannot reach the ideal height.

[0003] Therefore, the prior art has defects and deficiencies, and needs to be further improved and developed. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the present application aims to provide a light guide plate, a Mini LED backlight, a display device and a mobile terminal, which aims to solve the problem that the light emitted by the Mini LED of the Mini LED backlight in the prior art is easy to be shot out on the side circumferential surface of the light guide plate, causing brightness loss.

[0005] The technical scheme adopted by the present application to solve the technical problems is as follows: a light guide plate comprises:

[0006] A light guide body having an incident light surface and an exit light surface arranged opposite to each other, and a side circumferential surface connected to the incident light surface and the exit light surface;

[0007] A plurality of convex lens grooves are provided on the incident light surface, and the plurality of convex lens grooves are used to correspond to the Mini LED;

[0008] The exit light surface is arranged as a flush end surface.

[0009] Optionally, the incident light surface has a ridge region connected to the side circumferential surface, and a middle region located inside the ridge region; the plurality of convex lens grooves include a plurality of first convex lens grooves and a plurality of second convex lens grooves;

[0010] The plurality of first convex lens grooves are arranged in the ridge region, and the plurality of second convex lens grooves are arranged in the middle region; the curvature radius of the plurality of first convex lens grooves is smaller than the curvature radius of the plurality of second convex lens grooves.

[0011] Optionally, the curvature radius of the plurality of first convex lens grooves is 2mm-5mm;

[0012] A radius of curvature of the second convex lens groove is 5mm-10mm;

[0013] The radius of curvature of the first convex lens groove is less than the radius of curvature of the second convex lens groove.

[0014] Optionally, the distribution density of the first convex lens groove is less than the distribution density of the second convex lens groove.

[0015] Optionally, the light emitting surface is provided with convex point structures corresponding to the middle area.

[0016] Optionally, the side surface is coated with a reflective coating.

[0017] Another technical solution adopted by the present application to solve the technical problem is as follows: a Mini LED backlight source comprising the light guide plate.

[0018] Optionally, the Mini LED backlight source further comprises a rubber frame, and the rubber frame has an inner side surface coated with a rubber frame reflective layer corresponding to the side surface.

[0019] Another technical solution adopted by the present application to solve the technical problem is as follows: a display device comprising the Mini LED backlight source.

[0020] Another technical solution adopted by the present application to solve the technical problem is as follows: a mobile terminal comprising the Mini LED backlight source.

[0021] Beneficial effects:

[0022] The present application provides a light guide plate, a Mini LED backlight source, a display device and a mobile terminal. The light guide plate is provided with a plurality of convex lens grooves corresponding to the Mini LED on the light entering surface of the light guide body, so that the scattered light emitted by the Mini LED is refracted by the convex lens grooves, the angle of the light is reduced, the light is emitted in the direction perpendicular to the backlight, and the light emitted by the Mini LED can be effectively utilized, thereby greatly improving the brightness of the backlight surface. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the light entering surface of the light guide plate provided in the present application;

[0024] Figure 2 is a schematic diagram of the light guide plate provided in the present application Figure 1 is a schematic diagram of the light guide plate along the length direction;

[0025] Figure 3 is a variant schematic diagram of a preferred embodiment of the light-incident surface of the light guide plate provided in the present application;

[0026] Figure 4 is a variant schematic diagram of the light guide plate provided in the present application Figure 3 is a schematic diagram of a cross section of the light guide plate along the length direction;

[0027] Figure 5 is a variant structure schematic diagram of the light guide plate provided in the present application Figure 4

[0028] Figure 6 is an enlarged schematic diagram of part A in the light guide plate provided in the present application Figure 2

[0029] Figure 7 is a light route effect schematic diagram of the Mini LED backlight source provided in the present application

[0030] Figure 8 is a cross section schematic diagram of the Mini LED backlight source along the width direction provided in the present application

[0031] Figure 9 is an enlarged schematic diagram of part B in the light guide plate provided in the present application Figure 8

[0032] Legend of reference signs:

[0033] 1, Mini LED backlight source; 10, light guide plate; 11, light guide body; 12, convex lens groove; 111, light-incident surface; 112, light-incident surface; 113, side peripheral surface; 114, edge region; 115, middle region; 116, convex point structure; 117, light-reflecting coating; 121, first convex lens groove; 122, second convex lens groove; 20, glue frame; 21, glue frame light-reflecting layer; 30, Mini LED. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0035] ​​​In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Please refer to Figure 1 , Figure 2 and Figure 7 , the first embodiment of the present application provides a light guide plate 10, which is used as a light expansion component of Mini LED backlight 1, and is arranged above the Mini LED light plate. The light emitted by a plurality of Mini LED 30 is diffused and then enters the optical film. In view of the problem that part of the light of the light guide plate 10 of the Mini LED backlight 1 in the prior art is lost through the side peripheral surface 113, causing the brightness loss of the backlight, a light guide plate 10 is provided, which comprises a light guide body 11 and a plurality of convex lens grooves 12. The light guide body 11 has an opposite light entrance surface 111 and a light exit surface 112, and a side peripheral surface 113 connected to the light entrance surface 111 and the light exit surface 112. A plurality of convex lens grooves 12 are provided on the light entrance surface 111, and a plurality of convex lens grooves 12 are used to cover the Mini LED one by one.

[0038] It can be understood that the light guide plate 10 provided in the present application is provided with a plurality of convex lens grooves 12 corresponding to the Mini LED 30 on the light entrance surface 111 of the light guide body 11, so that the scattered light emitted by the Mini LED is refracted by the convex lens grooves 12, the angle of the light is reduced, the light is emitted vertically to the backlight, and the light emitted by the Mini LED can be effectively utilized, and the brightness of the backlight surface is greatly improved.

[0039] Please refer to Figure 3 and Figure 4 In some embodiments, the light entrance surface 111 has a edge region 114 connected with the side peripheral surface 113, and a middle region 115 inside the edge region 114; the plurality of convex lens grooves 12 include a plurality of first convex lens grooves 121 and a plurality of second convex lens grooves 122; a plurality of the first convex lens grooves 121 are arranged in the edge region 114, a plurality of the second convex lens grooves 122 are arranged in the middle region 115, and the curvature radius of a plurality of the first convex lens grooves 121 is smaller than the curvature radius of a plurality of the second convex lens grooves 122.

[0040] It can be understood that by controlling the curvature radius of a plurality of the first convex lens grooves 121 in the edge region 114 to be smaller than the curvature radius of a plurality of the second convex lens grooves 122, the edge light is quickly concentrated to the middle region 115 by a plurality of the first convex lens grooves 121, so that the scattered light can be greatly refracted when passing through a plurality of the first convex lens grooves 121, concentrated to the middle region 115, avoiding the light from the side peripheral surface, and ensuring the brightness of the backlight.

[0041] In some embodiments, the curvature radius of a plurality of the first convex lens grooves 121 is set to 2mm-5mm; the curvature radius of a plurality of the second convex lens grooves 122 is set to 5mm-10mm; and the curvature radius of a plurality of the first convex lens grooves 121 is smaller than the curvature radius of a plurality of the second convex lens grooves 122. In this way, the edge light is quickly concentrated to the middle region 115 by a plurality of the first convex lens grooves 121, so that the scattered light can be greatly refracted when passing through a plurality of the first convex lens grooves 121, concentrated to the middle region 115, avoiding the light from the side peripheral surface, and ensuring the brightness of the backlight.

[0042] In some embodiments, the distribution density of the first convex lens grooves 121 is less than the distribution density of the second convex lens grooves 122, so that the middle area 115 is distributed with more Mini LEDs, and the edge area 114 close to the side surface 113 is distributed with less Mini LEDs, further avoiding the light emitted by the Mini LEDs from being emitted from the side surface 113, and ensuring the brightness of the backlight source.

[0043] Please refer to Figure 5 In some embodiments, the light emitting surface 112 is provided with a plurality of convex structures 116 corresponding to the area of the middle area 115 in the height direction. In this way, when the light of the middle area 115 is emitted, part of the light is emitted to the area of the optical film above the edge area 114, which ensures the brightness and uniformity of the backlight source.

[0044] Please refer to Figure 6 In some embodiments, the side surface 113 is coated with a light reflecting coating 117, so that the light emitted to the side surface 113 is re-emitted into the light guide body 11 through the light reflecting coating 117, avoiding the loss of light and ensuring the brightness of the backlight source.

[0045] Please refer to Figures 7 to 9 The second embodiment of the present application also provides a Mini LED backlight source 1, which comprises the light guide plate 10 as described in the first embodiment of the present application, so as to ensure that the Mini LED backlight source 1 has sufficient brightness. For details, please refer to the above-mentioned first embodiment of the present application.

[0046] In some embodiments, the Mini LED backlight source 1 further comprises a rubber frame 20, and the rubber frame 20 has an inner side surface 113 coated with a rubber frame light reflecting layer 21 corresponding to the area of the side surface 113. In this way, the light emitted from the side surface 113 of the light guide plate 10 is re-reflected onto the light guide plate 10 or the optical film, ensuring the brightness of the Mini LED backlight source 1.

[0047] The third embodiment of the present application also provides a display device, which comprises the Mini LED backlight source 1 as described in the second embodiment of the present application, so as to ensure that the display device has sufficient brightness.

[0048] The fourth embodiment of the present application also provides a mobile terminal, which comprises the Mini LED backlight source 1 as described in the second embodiment of the present application, so as to ensure that the mobile terminal has sufficient brightness.

[0049] In summary, the application provides a light guide plate, a Mini LED backlight, a display device and a mobile terminal. The light guide plate comprises: a light guide body having an incident light surface and an exit light surface arranged oppositely, and a side peripheral surface connected to the incident light surface and the exit light surface; and a plurality of convex lens grooves, the plurality of convex lens grooves being arranged on the incident light surface and corresponding to the Mini LED. The light guide plate is provided with a plurality of convex lens grooves corresponding to the Mini LED on the incident light surface of the light guide body, so that the scattered light emitted by the Mini LED is refracted by the convex lens grooves, the angle of the light is reduced, the light is emitted along the direction perpendicular to the backlight, and the light emitted by the Mini LED can be effectively utilized, thereby greatly improving the brightness of the surface of the backlight.

[0050] It should be understood that the application is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes according to the above description, and all such improvements and changes shall fall within the scope of the appended claims.

Claims

1. A light guide plate, characterized by, The light guide plate comprises: a light guide body having an incident light surface and an exit light surface arranged oppositely, and a side peripheral surface connected to the incident light surface and the exit light surface; a plurality of convex lens grooves, the plurality of convex lens grooves are arranged on the incident light surface, and the plurality of convex lens grooves are used to correspond to the Mini LED; the incident light surface has a edge region connected to the side peripheral surface, and a middle region located inside the edge region; the plurality of convex lens grooves include a plurality of first convex lens grooves and a plurality of second convex lens grooves; the plurality of first convex lens grooves are arranged in the edge region, the plurality of second convex lens grooves are arranged in the middle region, and the curvature radius of the plurality of first convex lens grooves is smaller than the curvature radius of the plurality of second convex lens grooves.

2. The light guide plate according to claim 1, wherein: the curvature radius of the plurality of first convex lens grooves is set to 2mm-5mm; the curvature radius of the plurality of second convex lens grooves is set to 5mm-10mm; and the curvature radius of the plurality of first convex lens grooves is smaller than the curvature radius of the plurality of second convex lens grooves.

3. The light guide plate according to claim 1, wherein The distribution density of the plurality of first convex lens grooves is smaller than the distribution density of the plurality of second convex lens grooves.

4. The light guide plate according to claim 1, wherein The exit light surface is provided with a plurality of convex point structures corresponding to the region of the middle region along the height direction.

5. The light guide plate according to claim 1, wherein The side peripheral surface is coated with a reflective coating.

6. A Mini LED backlight, characterized in that, The light guide plate comprises the light guide plate according to any one of claims 1-5.

7. The Mini LED backlight of claim 6, wherein, The Mini LED backlight source further comprises a rubber frame, and the rubber frame has an inner side peripheral surface coated with a rubber frame reflective layer corresponding to the region of the side peripheral surface.

8. A display device, characterized by comprising: The Mini LED backlight source comprises the Mini LED backlight source according to any one of claims 6-7.

9. A mobile terminal, characterized by The Mini LED backlight source comprises the Mini LED backlight source according to any one of claims 6-7.

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