Backlight plate device

Abstract

The present invention relates to a backlight plate device. It includes a frame body with recessed groove, a lamp source group, a diffusion plate and at least an elastic element, in which inner wall surface of the recessed groove is equipped with reflecting layer, and the lamp source group is formed from several cold-cathode fluorescence lamps which are arranged in the recessed groove, one end of the elastic element is fixed in the bottom surface of the recessed groove, and its another end is placed against the diffusion plate. It utilizes the elastic element to absorb partial diffusion plate deformation energy to reduce its deformation, said elastic element also has buffer effect so as to make the diffusion plate have optimum planeness, so that it can provide hight luminance and luminance uniformly-distributed light source for liquid crystal panel.

Description

technical field [0001] The invention relates to a liquid crystal display, in particular to a backlight plate device applied to a liquid crystal display. Background technique [0002] The backlight module (Back Light Module) is a key component of a liquid crystal display (LCD). The backlight module supplies a light source with sufficient brightness and uniformity to make the LCD panel display images. [0003] The backlight module can be roughly divided into side-light and direct-light designs according to the position of the light source. The side-light design is to install the light source of the lamp on the side of the LCD panel, and then use the light guide plate to control the direction of the beam so that the beam is projected to the A diffuser plate under the panel, thus providing a uniform beam of light for the LCD panel. Because the light source adopts a side-mounted design, it is suitable for light, thin and power-saving display devices, such as the screen of a note...

AI Technical Summary

Problems solved by technology

[0005] Since the support column 14 directly contacts the diffuser plate 13, the contact will hinder the passage of light. In order to avoid a larger area of ​​black dot display on the diffuser plate 13, generally the support column 14 adopts a cone with a smaller cross-section at the top, so the support column 14 The top is in direct contact with the diffuser plate 13 with a sharp point, and when the size of the backlight module 10 increases or the temperature inside the frame 11 formed by the light source group 12 rises, the deformation of the diffuser plate 13 will increase and it will sag downward. At this time, the sharp point of the support column 14 is easy to push against the diffuser plate 13, causing the diffuser plate 13 to form an uneven surface, or even causing an unequal distance between the diffuser plate 13 and the light source group 12, resulting in uneven brightness distribution of the diffuser plate 13, Make the image displayed on the LCD panel bright and dark

In addition, the support column 14 is arranged in the groove 111. When the light beam provided by the light source is incident on the surface of the support column 14, the light beam cannot be effectively reflected or penetrated, so that it cannot be projected on the surface of the diffuser plate 13, which may easily cause the light source Loss

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