Irregular circular backlight module and display device

Abstract

The utility model relates to an irregular circular backlight module and a display device, the irregular circular backlight module comprises a light guide plate and a flexible circuit board, a plurality of lamp position grooves are uniformly arranged on the outer side edge of the light guide plate, and the flexible circuit board is connected with the light guide plate. The flexible circuit board is arranged on the light guide plate, and the lamp beads on the flexible circuit board are located in the lamp position grooves in the light guide plate respectively, so that the optical effect of irregular arc edges can be improved, the optical taste problem of shadows or light spots can be avoided, the irregular circular backlight module has the good optical taste, and the service life of the irregular circular backlight module is prolonged. Therefore, the irregular circular backlight module has a good display effect.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal backlight, in particular to an irregular circular backlight module and a display device. Background Art

[0002] At present, LED backlight technology is widely used in automotive in - vehicle instrument displays because of its long service life and low power consumption. In common backlight modules, flexible circuit boards with LEDs fixed and welded on one side or both sides of the light guide plate are used. When the light beams emitted by the LEDs pass through the saw - tooth mesh patterns and cylindrical dot patterns on the light guide plate, they will be evenly distributed on the light guide plate to achieve the display of the automotive instrument panel.

[0003] In existing backlight modules with irregular - shaped circular light - emitting surfaces, when using the same - side lamp - arranging design method of a conventional side - entry backlight module, its optical effect is difficult to reach an ideal level, and there are taste problems such as optical effects like shadow and light spot easily existing on its irregular circular edge. Summary of the Utility Model

[0004] Based on this, it is necessary to provide an irregular circular backlight module and a display device.

[0005] The technical solution of the utility model to solve the above - mentioned technical problems is as follows: An irregular circular backlight module, comprising:

[0006] A light guide plate, on which a plurality of lamp - position grooves are opened, and each of the lamp - position grooves is evenly distributed on the outer edge of the light guide plate;

[0007] A flexible circuit board, which is connected to the first surface of the light guide plate, and the flexible circuit board is provided with a plurality of lamp beads, and each lamp bead is located in a lamp - position groove.

[0008] In one embodiment, the number of the lamp - position grooves is set to four, and the number of the lamp beads is equal to that of the lamp - position grooves.

[0009] In one embodiment, a plurality of divergence grooves are opened on the side wall of the lamp - position groove, and each of the divergence grooves is arranged towards the lamp bead.

[0010] In one embodiment, the cross - sectional shape of the divergence groove is "V" - shaped.

[0011] In one embodiment, a plurality of first light - guiding dots and a plurality of second light - guiding dots are arranged on the light guide plate, and each of the first light - guiding dots and each of the second light - guiding dots are evenly distributed on the first surface of the light guide plate, and the width of the first light - guiding dot is smaller than that of the second light - guiding dot.

[0012] In one embodiment, the irregular circular backlight module further includes: a diffuser film, and a first surface of the diffuser film is connected to a second surface of the light guide plate.

[0013] In one embodiment, the irregular circular backlight module further includes: a light-shielding adhesive layer, and a first surface of the light-shielding adhesive layer is connected to a second surface of the diffuser film.

[0014] In one embodiment, the irregular circular backlight module further includes: a first fixing adhesive layer, a first surface of the first fixing adhesive layer is connected to the flexible circuit board, and a second surface of the first fixing adhesive layer is connected to a first surface of the light guide plate.

[0015] In one embodiment, the irregular circular backlight module further includes: a second fixing adhesive layer, a first surface of the second fixing adhesive layer is connected to a second surface of the light guide plate, and a second surface of the second fixing adhesive layer is connected to a first surface of the diffuser film.

[0016] The present utility model further provides a display device, including the irregular circular backlight module in any one of the above embodiments.

[0017] The beneficial effects of the present utility model are as follows: An irregular circular backlight module provided by the present utility model has a plurality of lamp position grooves uniformly formed on an outer edge of a light guide plate, a flexible circuit board is connected to the light guide plate, and each lamp bead on the flexible circuit board is respectively located in the lamp position groove on the light guide plate. In this way, the optical effect of the irregular arc edge can be improved, the optical taste problem of shadow or light spot can be avoided, the irregular circular backlight module has a good optical taste, and thus the irregular circular backlight module has a better display effect. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of an irregular circular backlight module of an embodiment;

[0020] Figure 2 It is a three-dimensional exploded structural diagram of an irregular circular backlight module of an embodiment;

[0021] Figure 3 It is a schematic structural diagram of a light guide plate of an embodiment;

[0022] Figure 4 ForFigure 3 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 The figure is a schematic diagram of the three-dimensional exploded structure of an irregular circular backlight module according to an embodiment.

[0024] In the accompanying drawings, 10, irregular circular backlight module; 100, light guide plate; 110, lamp position slot; 200, flexible circuit board; 210, lamp beads; 220, divergent slot; 300, light diffusion film; 400, light shielding adhesive layer; 500, first fixed adhesive layer; 600, second fixed adhesive layer; 700, release film layer. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0026] It should be understood that the same or similar numbers in the drawings of the embodiments correspond to the same or similar parts. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, an irregular circular backlight module 10 includes: a light guide plate 100 and a flexible circuit board 200, wherein the light guide plate 100 is provided with a plurality of lamp position slots 110, each of the lamp position slots 110 is evenly distributed on the outer edge of the light guide plate 100, the flexible circuit board 200 is connected to the first surface of the light guide plate 100, and the flexible circuit board 200 is provided with a plurality of lamp beads 210, and each of the lamp beads 210 is located in one of the lamp position slots 110.

[0028] In this embodiment, a plurality of lamp position grooves 110 are evenly formed on the outer edge of the light guide plate 100. The flexible circuit board 200 is connected to the light guide plate 100, and each lamp bead 210 on the flexible circuit board 200 is respectively located in the lamp position groove 110 on the light guide plate 100. Incident light sources are provided around the light guide plate 100, that is, the periphery of the light guide plate 100 is the light incident side. In this way, the optical effect of the irregular arc edge can be improved, and the optical taste problems such as shadow or light spot can be avoided, so that the irregular circular backlight module 10 has good optical taste, and thus the irregular circular backlight module 10 has a better display effect.

[0029] In one embodiment, as Figure 2 and Figure 3 shown, the number of the lamp position grooves 110 is set to four, and the number of the lamp beads 210 is equal to that of the lamp position grooves 110. Specifically, the four lamp position grooves 110 are evenly distributed on the four peripheral edges of the light guide plate 100. The lamp position grooves 110 are used to accommodate and avoid the lamp beads 210. The four lamp beads 210 are respectively located in a lamp position groove 110. The lamp beads 210 are LED lamp beads 210, which can make incident light sources exist around the light guide plate 100, thereby avoiding the problems of shadow or light spot on the irregular arc edge and having good optical taste.

[0030] In one embodiment, as Figure 3 and Figure 4 shown, a plurality of diverging grooves 220 are formed on the side wall of the lamp position groove 110, and each diverging groove 220 is arranged towards the lamp bead 210. Specifically, the diverging grooves 220 are evenly distributed on the side wall of the lamp position groove 110, and the cross-sectional shape of the diverging groove 220 is "V" shaped. That is, by providing a sawtooth optical structure on the side wall of the lamp position groove 110, the point light source emitted by the lamp bead 210 can be converted into a more divergent surface light source, which can better improve the optical effect of the irregular circular backlight module 10.

[0031] In one embodiment, a plurality of first light guide dots and a plurality of second light guide dots are provided on the light guide plate 100. The first light guide dots and the second light guide dots are evenly distributed on the first surface of the light guide plate 100, and the width of the first light guide dot is smaller than that of the second light guide dot. Specifically, by evenly distributing the first light guide dots and the second light guide dots with different sizes on the first surface of the light guide plate 100, the point light source emitted by the lamp bead 210 can be better converted into a more uniform surface light source, so that the irregular circular backlight module 10 has a more uniform and homogeneous optical effect.

[0032] In one embodiment, as Figure 1 and Figure 5As shown, the irregular circular backlight module 10 further includes: a diffuser film 300, and a first surface of the diffuser film 300 is connected to a second surface of the light guide plate 100. Specifically, by providing the diffuser film 300 on the second surface of the light guide plate 100, the diffuser film 300 can diffuse the light scattered from the light guide plate 100, and by expanding the diffusion angle, the problem of uneven brightness and darkness can be further overcome, so that a uniform surface light source can be realized.

[0033] In one embodiment, as Figure 1 and Figure 5 shown, the irregular circular backlight module 10 further includes: a light-shielding adhesive layer 400, and a first surface of the light-shielding adhesive layer 400 is connected to a second surface of the diffuser film 300. Specifically, by providing the light-shielding adhesive layer 400 on the second surface of the diffuser film 300, the light guide plate 100 with an irregular shape around can have a circular light-emitting surface, and at the same time, it can prevent the occurrence of poor phenomena such as light leakage around the irregular circular backlight module 10 without a bottom plate and a middle frame structure, and can also play a role in bonding and fixing the diffuser film 300, ensuring that the irregular circular backlight module 10 has a good overall optical effect.

[0034] In one embodiment, as Figure 5 shown, the irregular circular backlight module 10 further includes: a release film layer 700, and the release film layer 700 is provided on a surface of the light-shielding adhesive layer 400 away from the diffuser film 300. The release film layer 700 can protect other layer structures of the irregular circular backlight module 10 from scratches, dust and other contaminants during the assembly process of the irregular circular backlight module 10, playing a protective role and ensuring the high performance and stability of the irregular circular backlight module 10.

[0035] In one embodiment, as Figure 5 shown, the irregular circular backlight module 10 further includes: a first fixing adhesive layer 500, a first surface of the first fixing adhesive layer 500 is connected to the flexible circuit board 200, and a second surface of the first fixing adhesive layer 500 is connected to a first surface of the light guide plate 100. Specifically, the first fixing adhesive layer 500 is an annular adhesive layer, and the first fixing adhesive layer 500 can bond the light guide plate 100 to the flexible circuit board 200, avoiding the occurrence of poor phenomena such as displacement and loosening of the light guide plate 100, and ensuring that the irregular circular backlight module 10 has a good overall optical effect.

[0036] In one embodiment, as Figure 5As shown, the irregular circular backlight module 10 further includes: a second fixing adhesive layer 600. The first surface of the second fixing adhesive layer 600 is connected to the second surface of the light guide plate 100, and the second surface of the second fixing adhesive layer 600 is connected to the first surface of the diffusing film 300. Specifically, the second fixing adhesive layer 600 is an annular adhesive layer. The second fixing adhesive layer 600 can paste and fix the diffusing film 300 on the light guide plate 100, playing a role in fixing the diffusing film 300, and can avoid adverse phenomena such as displacement and loosening of the diffusing film 300, ensuring that the irregular circular backlight module 10 has a better overall optical effect.

[0037] In one embodiment, a display device is provided, including the irregular circular backlight module 10 described in any of the above embodiments. In this embodiment, the display device is a liquid crystal panel. The display device further includes a circuit board, a liquid crystal display screen, and an outer frame. The irregular circular backlight module 10 is disposed above the circuit board and is installed and fixed on the circuit board through mounting feet and fixing feet. The liquid crystal display screen is fixed on the irregular circular backlight module 10, and the outer frame is disposed around the outside of the irregular circular backlight module 10. It should be understood that the display device may further include other components, which will not be described in detail here.

[0038] Compared with the prior art, the present invention has at least the following advantages:

[0039] An irregular circular backlight module provided by the present invention has a plurality of lamp position grooves uniformly formed on the outer edge of the light guide plate. The flexible circuit board is connected to the light guide plate, and each lamp bead on the flexible circuit board is respectively located in the lamp position groove on the light guide plate. In this way, it can improve the optical effect of the irregular arc edge, avoid optical taste problems such as shadow or light spot, make the irregular circular backlight module have good optical taste, and thus the irregular circular backlight module has a better display effect.

[0040] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limitations on the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An irregular circular backlight module, characterized in that, Comprising: A light guide plate, on which a plurality of lamp position grooves are formed, and each of the lamp position grooves is evenly distributed on the outer edge of the light guide plate; A flexible circuit board, which is connected to the first surface of the light guide plate, and the flexible circuit board is provided with a plurality of lamp beads, and each of the lamp beads is located in one of the lamp position grooves.

2. The irregular circular backlight module according to claim 1, wherein The number of the lamp position grooves is set to four, and the number of the lamp beads is equal to the number of the lamp position grooves.

3. The irregular circular backlight module according to claim 1, wherein A plurality of divergence grooves are formed on the side wall of the lamp position groove, and each of the divergence grooves is arranged towards the lamp bead.

4. The irregular circular backlight module according to claim 3, wherein The cross-sectional shape of the divergence groove is "V" shaped.

5. The irregular circular backlight module according to claim 1, wherein A plurality of first light guide dots and a plurality of second light guide dots are arranged on the light guide plate, and each of the first light guide dots and each of the second light guide dots are evenly distributed on the first surface of the light guide plate, and the width of the first light guide dot is smaller than the width of the second light guide dot.

6. The irregular circular backlight module according to claim 1, wherein Further comprising: A diffusing film, the first surface of which is connected to the second surface of the light guide plate.

7. The irregular circular backlight module according to claim 6, wherein Further comprising: A light-shielding adhesive layer, the first surface of which is connected to the second surface of the diffusing film.

8. The irregular circular backlight module according to claim 7, wherein Further comprising: A first fixing adhesive layer, the first surface of which is connected to the flexible circuit board, and the second surface of which is connected to the first surface of the light guide plate.

9. The irregular circular backlight module according to claim 8, wherein Further comprising: A second fixing adhesive layer, the first surface of which is connected to the second surface of the light guide plate, and the second surface of which is connected to the first surface of the diffusing film.

10. A display device, characterized in that, Comprising the irregular circular backlight module according to any one of claims 1-9.

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