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Backlight module, liquid crystal display device and light source of backlight module

A technology of backlight module and backplane, which is applied in the cooling/heating device, light source, electric light source, etc. The effect of temperature, saving thickness and increasing A value

Inactive Publication Date: 2015-02-18
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under this setting, although the influence of heat on components such as the reflective sheet 110 is avoided as far as possible during heat transfer, the heat conduction path is still to transfer heat to the backplane 100 through the heat conducting plate 190, and realize heat dissipation through the contact between the backplane 100 and the air. , the heat transfer path is still long, so the heat will still accumulate inside the backlight module for a long time, thus affecting the service life and safety of the components inside the backlight module and the service life of the liquid crystal panel of the liquid crystal display device

Method used

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  • Backlight module, liquid crystal display device and light source of backlight module
  • Backlight module, liquid crystal display device and light source of backlight module
  • Backlight module, liquid crystal display device and light source of backlight module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 4Shown is the first embodiment of the present invention, as shown in the figure is the light bar 140 of the backlight module, the light bar 140 includes: LED chip 145 and heat sink 144, the heat sink 144 includes: substrate 1441, set on The heat dissipation fins 1442 on the back of the substrate 1441 , the LED chip 145 is welded on the substrate 1441 , and the wiring is arranged on the substrate 1441 by etching. Among them, the substrate 1441 is made of metal material with good heat dissipation, such as aluminum, copper and other materials, and a layer of insulating layer is attached on the circuit layout surface to avoid circuit short circuit. Insulation layer, so that the heat of the light bar 140 can be conducted to the corresponding place in time by the heat sink 144, such as the aluminum extrusion, the back plate, and the heat emitted by the LED chip 145 on the light bar 140 is conducted in time, The temperature of the light bar 140 is reduced, the...

Embodiment 2

[0043] Such as Figure 5 Shown is the second embodiment of the present invention. As shown in the figure, the backlight module of the liquid crystal display device includes: a back plate 100, a reflective plate 110 placed on the back plate 100, and a reflective plate 110 placed on the reflective plate 110. The light guide plate 120 facing the light bar 140 , the plastic frame 150 and the outer frame 200 arranged outside the back plate 100 and pressed against the light guide plate 120 , the optical film 130 is arranged on the light-emitting surface of the light guide plate 120 , and the liquid crystal panel 300 is composed of Components such as the plastic frame 150 and the outer frame 200 are fixed above the backlight module; wherein, the light bar 140 is arranged on the backplane 100, and the light bar 140 is the light source described in the first embodiment. Such as Figure 5 As shown in , the side wall of the backplane 100 is provided with an embedding hole, the light bar...

Embodiment 3

[0048] Such as Image 6 Shown is the third embodiment of the present invention. In this embodiment, the plastic frame 150 is provided with a through groove corresponding to the installation position of the light bar 140, and the back plate 100 is provided with a bending structure 101 at this position to form a depression. The bent structure 101 is submerged in the through groove on the plastic frame 150, while the light bar 140 is directly installed on the bent structure 101 of the back plate 100. Similarly, the bent structure 101 is also provided with a light bar 140 The heat sink 144 of the light bar 140 is submerged in the embedded hole, so that the distance between the light bar 140 and the inner edge 151 of the plastic frame 150 is increased, so that the A value can be increased, thereby avoiding the firefly phenomenon in the liquid crystal It takes place in the display area of ​​the display device (that is, the AA area). Such as Image 6 As shown in , the A value S2 of...

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Abstract

Disclosed are a backlight module, a liquid crystal display device, and a light source of a backlight module. The backlight module comprises an LED chip and a heat-dissipating piece. The LED chip and the circuit thereof are directly arranged on the heat-dissipating piece. In the present invention, the LED chip of the backlight module and the circuit thereon are directly arranged on the heat-dissipating piece, so that heat generated by the LED chip can be conducted out in time through the heat-dissipating piece with good heat-dissipating performance, the temperature inside the backlight module is reduced, and the heat-dissipating efficiency of the backlight module is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal display, and more specifically, relates to a backlight module, a liquid crystal display device and a light source of the backlight module. Background technique [0002] The backlight module is one of the key components of the liquid crystal display device, which is mainly used to provide sufficient brightness and uniformly distributed light source so that the liquid crystal display device can display images normally. [0003] Such as figure 1 Shown is a backlight module of a liquid crystal display device, including: a back plate 100, a light bar 140 fixed on the side wall of the back plate 100, a reflector 110 placed on the back plate 100, and a reflector 110 placed between The light guide plate 120 on top and facing the light bar 140, the plastic frame 150 and the outer frame 200 arranged outside the back plate 100 and pressed against the light guide plate 120, the optical film 130 is arranged on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/00F21V29/50G02F1/13357F21Y101/02
CPCG02F2001/133628G02B6/0085G02B6/0091G02F1/133615G02F1/133628
Inventor 余亚军李全
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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