Uniform light heat dissipation type backlight module

Abstract

The utility model relates to the technical field of backlight modules, in particular to a uniform light heat dissipation type backlight module which comprises a bottom plate, a side plate and a light diffusion assembly, the light diffusion assembly is arranged on the bottom plate, the side plate is fixedly arranged on the bottom plate and covers the light diffusion assembly, a light hole is formed in the side plate, and the light hole is communicated with the light diffusion assembly. Light transmitting holes are formed in the bottom plate, light sources matched with the light transmitting holes are fixedly arranged on the side plates, heat conducting rings are arranged on the light sources, heat conducting pieces are fixedly arranged on the heat conducting rings, grooves matched with the heat conducting pieces are formed in the bottom plate, and the heat conducting pieces are embedded in the grooves. Due to the fact that the heat-conducting fins are embedded in the grooves of the bottom plate, heat of the heat-conducting fins can be further conducted to the bottom plate, the heat dissipation area is increased again through the bottom plate, and the heat dissipation effect is improved; and meanwhile, the air inlet fan is arranged to be matched with the air guide channel to blow away the heated air.

Description

TECHNICAL FIELD

[0001] The utility model relates to backlight module technical field especially relates to a light -even heat dissipation type backlight module. BACKGROUND

[0002] Liquid crystal television and liquid crystal display have made great progress in recent years, and the technical progress has significantly improved the picture quality and user experience. Liquid crystal panel itself does not have the ability to emit light, so it relies on the backlight to provide the necessary light to achieve clear image display. The design and performance of the backlight module directly affect the display effect. It not only needs to provide sufficient brightness, but also needs to ensure the uniform distribution of light sources, so as to avoid the phenomenon of uneven brightness or shadow on the screen. With the continuous progress of technology, the backlight of liquid crystal television and display has undergone many innovations, from the early fluorescent lamp to the widely used LED backlight. The latter has become the mainstream choice because of its higher energy efficiency and better color performance.

[0003] The existing backlight module usually sets a light guide plate and a light diffusion structure, which increases the effective uniform illumination area of the light guide plate and improves the light even effect. For example, Chinese patent No. CN205691909U discloses a light even heat dissipation type backlight module, which includes an LED lamp group, a back plate, an upper frame, a bottom reflecting sheet, a light guide plate, a condensing lens sheet, and an arrayed plano-convex lens sheet. A micro-prism film with an arrayed prism structure is attached to the light entrance surface of the light guide plate. The upper frame is a heat dissipation aluminum profile frame coated with epoxy heat conductive glue on the surface. The inner sides of the back plate and the upper frame are both provided with a heat dissipation sheet group composed of several electrically conductive heat dissipation sheets and several temperature equalizing sheets arranged between the heat dissipation sheets. The multiple heat dissipation modes effectively prevent heat accumulation and temperature abnormally rising, achieve heat dissipation effect, and increase the effective uniform illumination area of the light guide plate, improving the light even effect.

[0004] However, in actual use, due to the limited space of the display, the internal air flow is poor, so that although the heat dissipated by the heat dissipation structure is partially diffused into the air, most of the heated air is still located near the heat dissipation structure, affecting the continuous heat dissipation of the heat dissipation structure. With the increase of the working time of the backlight module, the heat dissipation effect becomes worse and worse, affecting the normal use of the backlight module. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the prior art that the heated air of the heat dissipation structure affects the continuous heat dissipation of the heat dissipation structure, and the heat dissipation effect becomes worse and worse with the increase of the working time of the backlight module, affecting the normal use of the backlight module, and proposes a light even heat dissipation type backlight module.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of light uniformity heat dissipation type backlight module, including bottom plate, side plate and light diffusion subassembly, the light diffusion subassembly is set on the bottom plate, the side plate is fixedly arranged on the bottom plate and covers the outside of the light diffusion subassembly, the side plate is equipped with light transmission hole, light source is fixedly arranged with the light transmission hole on the side plate, the light emitted by the light source is irradiated on the light diffusion subassembly through the light transmission hole, heat conduction ring is uniformly arranged on the light source, heat conduction sheet is fixedly arranged on the heat conduction ring, recess is equipped with the heat conduction sheet with on the bottom plate, and the heat conduction sheet is embedded in the recess.

[0008] Further, the heat conduction sheet is fixedly provided with an expansion wing, the expansion wing is embedded on the bottom plate, and the lower end of the bottom plate is provided with a heat sink.

[0009] Further, the lower end of the bottom plate is provided with a shroud matched with the heat sink, and the shroud is provided with two air guide channels for air circulation.

[0010] Further, the two sides of the shroud are provided with an air inlet groove and an air outlet hole group respectively, and an air inlet fan is fixedly arranged on the side plate, with the air outlet of the air inlet fan being located below and being communicated with the air inlet groove.

[0011] Further, the side plate is provided with a clamping groove, and the shroud is fixedly provided with a clamping piece matched with the clamping groove, and the clamping piece is clamped with the clamping groove.

[0012] Further, the light diffusion subassembly comprises a reflection layer, a light guide plate and a first diffusion layer arranged in sequence on the bottom plate, and the first diffusion layer is provided with a prism layer and a second diffusion layer.

[0013] The light uniformity heat dissipation type backlight module has the beneficial effects that:

[0014] In the utility model, the heat conduction sheet is embedded in the recess of the bottom plate, so that the heat of the heat conduction sheet can be further conducted to the bottom plate, and the heat dissipation area is increased again through the bottom plate, thereby improving the heat dissipation effect.

[0015] Secondly, in the utility model, the heat dissipation area is further increased by arranging the heat sink, and the heated air is blown away by the air inlet fan and the air guide channel, so as to prevent the accumulation of heated air from affecting the heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure diagram of the light uniformity heat dissipation type backlight module is provided in the utility model.

[0017] Figure 2It is the structure schematic view of the bottom plate of the utility model;

[0018] Figure 3 It is the structure schematic view of the heat conduction sheet of the utility model;

[0019] Figure 4 It is the structure schematic view of the shield of the utility model;

[0020] Figure 5 It is the structure schematic view of the air guide channel of the utility model.

[0021] In the drawing: 1, bottom plate;2, side plate;21, light transmission hole;22, clamping groove;3, light diffusion assembly;31, reflecting layer;32, light guide plate;33, first diffusion layer;34, prism layer;4, light source;5, heat conduction ring;6, heat conduction sheet;61, expansion wing;62, heat dissipation fin;63, shield;64, air guide channel;65, air inlet groove;66, exhaust hole group;67, air inlet fan;68, clamping piece. Specific implementation

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Reference Figures 1-5 A light uniforming and heat dissipating type backlight module, comprising a bottom plate 1, a side plate 2 and a light diffusion assembly 3, the light diffusion assembly 3 is arranged on the bottom plate 1, the side plate 2 is fixedly arranged on the bottom plate 1 and covers the outside of the light diffusion assembly 3, the light transmission hole 21 is formed in the side plate 2, the light source 4 is fixedly arranged on the side plate 2 and matched with the light transmission hole 21, the light emitted by the light source 4 passes through the light transmission hole 21 and irradiates on the light diffusion assembly 3, the heat conduction ring 5 is arranged on the light source 4, the heat conduction sheet 6 is fixedly arranged on the heat conduction ring 5, the recess matched with the heat conduction sheet 6 is formed in the bottom plate 1, and the heat conduction sheet 6 is embedded in the recess.

[0024] In the utility model, the heat generated by the light source 4 is absorbed by the heat conduction ring 5, and the heat led out by the heat conduction ring 5 is diffused by the heat conduction sheet 6, so that the heat dissipation area is increased, the bottom plate 1 and the side plate 2 are metal plates, the heat of the heat conduction sheet 6 can be further conducted to the bottom plate 1 since the heat conduction sheet 6 is embedded in the recess of the bottom plate 1, the heat dissipation area is increased again by the bottom plate 1, and the heat dissipation effect is improved.

[0025] Further, in the embodiment, the expansion wing 61 is fixedly arranged on the heat conduction sheet 6, the expansion wing 61 is embedded in the bottom plate 1, the heat dissipation fin 62 is arranged at the lower end of the bottom plate 1, the heat dissipation area is increased by arranging the expansion wing 61 and the heat dissipation fin 62, rapid heat dissipation is realized, and the phenomenon that the heat dissipation area is too small to cause hot air accumulation and affect heat dissipation is prevented.

[0026] Further, in the embodiment, the lower end of the bottom plate 1 is provided with a shroud 63 matched with the heat dissipation fins 62, two air guide channels 64 for air circulation are arranged on the shroud 63, the shroud 63 is arranged to prevent the heat dissipation fins 62 from being damaged due to collision, and the air guide channels 64 are arranged for air circulation to facilitate blowing away hot air.

[0027] It should be noted that, in the embodiment, the two sides of the shroud 63 are arranged in the air inlet groove 65 and the air outlet hole group 66 respectively, the air inlet fan 67 is fixedly arranged on the side plate 2, the air outlet of the air inlet fan 67 is located below and communicates with the air inlet groove 65, the air inlet fan 67 inhales normal temperature air and blows the air into the air guide channels 64 along the air inlet groove 65, and the hot air in the air guide channels 64 is discharged along the air outlet hole group 66 to avoid the accumulation of hot air affecting heat dissipation.

[0028] In addition, in the embodiment, the clamping groove 22 is arranged on the side plate 2, and the clamping piece 68 matched with the clamping groove 22 is fixedly arranged on the shroud 63, the clamping piece 68 is clamped with the clamping groove 22, the clamping piece 68 is an elastic clamping piece, which facilitates disassembly and assembly of the shroud 63 and facilitates cleaning of the shroud 63.

[0029] In more detail, in the embodiment, the light diffusion assembly 3 comprises a reflection layer 31, a light guide plate 32 and a first diffusion layer 33 arranged on the bottom plate 1 in sequence, a prism layer 34 and a second diffusion layer are arranged on the first diffusion layer 33, and the light guide plate 32 cooperates with the first diffusion layer 33, the prism layer 34 and the second diffusion layer to improve the uniform light effect.

[0030] The working mode is as follows: in working, the heat generated by the light source 4 is absorbed by the heat conduction ring 5, the heat led out by the heat conduction ring 5 is diffused by the heat conduction fins 6, the heat conduction fins 6 further conduct the heat to the bottom plate 1, the heat conduction fins 6 and the heat dissipation fins 62 increase the heat dissipation area, the heat is rapidly dissipated, the air inlet fan 67 inhales normal temperature air and blows the air into the air guide channels 64 along the air inlet groove 65, the hot air in the air guide channels 64 is discharged along the air outlet hole group 66 to avoid the accumulation of hot air affecting heat dissipation.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A uniform light diffusing heat dissipating backlight module, comprising a bottom plate (1), a side plate (2) and a light diffusing assembly (3), characterized in that, The light diffusion assembly (3) is arranged on the bottom plate (1), the side plate (2) is fixedly arranged on the bottom plate (1) and covers the outside of the light diffusion assembly (3), the side plate (2) is provided with a light transmission hole (21), the side plate (2) is fixedly provided with a light source (4) matched with the light transmission hole (21), the light emitted by the light source (4) passes through the light transmission hole (21) and irradiates on the light diffusion assembly (3), the light source (4) is provided with a heat conduction ring (5), the heat conduction ring (5) is fixedly provided with a heat conduction sheet (6), the bottom plate (1) is provided with a groove matched with the heat conduction sheet (6), and the heat conduction sheet (6) is embedded in the groove.

2. The uniform light dispersing heat dissipating back light module according to claim 1, wherein: The heat conduction sheet (6) is fixedly provided with an expansion wing (61), the expansion wing (61) is embedded on the bottom plate (1), and the lower end of the bottom plate (1) is provided with a heat dissipation fin (62).

3. The uniform light dispersing heat dissipating back light module according to claim 2, wherein: The lower end of the bottom plate (1) is provided with a shield (63) matched with the heat dissipation fin (62), and the shield (63) is provided with two air guide channels (64) for air circulation.

4. The uniform light backlight module of claim 3, wherein: The two sides of the shield (63) are respectively arranged in an air inlet groove (65) and an air outlet hole group (66), and the side plate (2) is fixedly provided with an air inlet fan (67).

5. The uniform light backlight module of claim 3, wherein: The side plate (2) is provided with a clamping groove (22), and the shield (63) is fixedly provided with a clamping piece (68) matched with the clamping groove (22), and the clamping piece (68) is clamped with the clamping groove (22).

6. The uniform light emitting heat dissipating back light module of claim 1, wherein: The light diffusion assembly (3) comprises a reflection layer (31), a light guide plate (32) and a first diffusion layer (33) arranged on the bottom plate (1) in sequence, the first diffusion layer (33) is provided with a prism layer (34) and a second diffusion layer.

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