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Backlight module and liquid crystal display device

A technology of backlight module and light guide plate, which is applied to lighting devices, fixed lighting devices, components of lighting devices, etc., can solve problems such as cracking of light guide plate 3, achieve cheap materials, avoid shaking and impact, and avoid extrusion damage Effect

Inactive Publication Date: 2012-06-13
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to force analysis, such as Figure 4 The positioning hole 32 at the position a shown in the figure will produce obvious stress concentration phenomenon at its root because the angles of R1 and R2 are too small, thus easily causing the crack of the light guide plate 3

Method used

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  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device

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Embodiment approach

[0036] Such as Figure 9 Shown is the third embodiment of the present invention, and the difference from the first embodiment is that the rivet 31 is tightly wrapped by the buffer structure 33, and there is no gap on the contact surface between the two, so that the rivet 31 can be avoided relative to the The light guide plate 3 vibrates over a large distance, thereby reducing the force of the collision.

[0037]In several embodiments of the present invention, the material of the buffer structure is preferably a material with good wear resistance, so that the buffer structure can be guaranteed not to be worn during vibration, thereby ensuring its reliability as a buffer structure. Generally speaking, silica gel or rubber or foamed plastics are better cushioning materials, which have good elasticity, strong wear resistance, and are cheap.

[0038] The cushioning structure can be manufactured into a standard part through a mold, which can be mass-produced and has good versatilit...

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Abstract

The invention discloses a backlight module and a liquid crystal display device. The backlight module comprises a back plate and a light guide plate, wherein the edge of the light guide plate is provided with a boss which is provided with positioning holes, and the back plate is provided with a rivet matched with one positioning hole; and a buffering structure is arranged between the rivet and the hole wall of the positioning hole. According to the invention, the edge of the light guide plate is provided with the boss which is provided with the positioning holes, so that the arrangement of the positioning holes has no influence on the light guide area of the light guide plate; and simultaneously a layer of buffering structure is arranged between the positioning hole and the rivet, so that the part with more concentrated stress in the positioning hole is prevented from cracking in impact. In addition, when the light guide plate is expanded by heating, the buffering structure also can prevent the extruded damage caused by direct extrusion between the light guide plate and the rivet; and when the light guide plate is contracted by cooling, the spacing between the light guide plate and the rivet is increased so as to be easy to cause swinging, but due to existence of the buffering piece, the swinging and impact of the light guide plate can be prevented by the elastic adjustment of the buffering piece.

Description

technical field [0001] The invention relates to the field of liquid crystal display, more specifically, to a backlight module and a liquid crystal display device. Background technique [0002] TFT LCD (Thin Film Transistor Liquid Crystal Display) has become an important display platform in modern IT and video products. Its main working principle: Appropriate voltage is loaded between the liquid crystal layer combined with the Array glass substrate and the CF glass substrate, so that the liquid crystal molecules are deflected under the action of voltage, and different transmittances are obtained through different voltage control, thereby realizing the display. Since the LCD cannot emit light by itself, it needs to use a backlight as its light source. At present, LCD backlights are mainly composed of two methods according to different light emitting devices, namely CCFL backlights and LED backlights. Compared with CCFL backlights, LED backlights have greater advantages in vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V17/10F21V15/00G02F1/13357
CPCG02B6/0088G02B6/00
Inventor 邓明锋蔡荣茂文松贤庄益壮周辉巫景铭
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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