Backlight module and liquid crystal display module

Abstract

A backlight module, the backlight module includes: a backplane, a light source, a reflection sheet, a light guide plate, an optical film, and a fixed frame; wherein the backplane includes a first bottom sheet metal and a second bottom sheet metal, The first bottom sheet metal and the second bottom sheet metal enclose an accommodation cavity, the first bottom sheet metal and the second bottom sheet metal are combined together through riveting holes, and the first bottom sheet metal is located The upper surface of the second bottom sheet metal; the light source is arranged in the accommodating cavity, the reflective sheet is arranged on the bottom surface of the backboard; the light guide plate is arranged on the reflective sheet, and the light source The light exit surface of the light guide plate corresponds to the light incident surface of the light guide plate; the optical film is arranged in the accommodating cavity and is located on the light exit surface of the light guide plate; the fixed frame is arranged on the opposite side of the back plate sides.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a backlight module and a liquid crystal display module. Background technique [0002] With the development of vehicle-mounted display technology, the requirements for the appearance of vehicle-mounted display modules are getting higher and higher, and the requirements for the frame of vehicle-mounted LTPS (Low Temperature Poly-Silicon, LTPS, low temperature polysilicon) display modules are also getting narrower. [0003] Due to the high reliability requirements of the on-board display, the optical diaphragm will expand under high temperature conditions. Since the optical diaphragm of the vehicle-mounted display device is relatively large overall, the deformation due to expansion is also large. When the deformation of the optical diaphragm is greater than the gap between the optical diaphragm and the side wall, the optical diaphragm will be affected by The hindered exp...

AI Technical Summary

Problems solved by technology

At the same time, due to the relatively high power consumption of medium and large-sized vehicle modules, and relatively strict heat dissipation requirements, there are also strict restrictions on the choice of material thickness.

With the increasing demand for ultra-narrow bezels of vehicle-mounted modules in the market, for medium and large-sized vehicle-mounted modules, due to the limitations of module frame size, heat dissipation capacity, and structural strength, conventionally designed modules cannot guarantee the performance of vehicle-mounted displays. The goal of narrow bezel design is achieved under the premise of high reliability requirements of the module

[0004] Therefore, the existing backlight modules and liquid crystal display modules used for narrow frame vehicle display devices, due to the limitation of the frame size, heat dissipation capacity and structural strength of the modules, have the technical problem of hindering the expansion of the optical diaphragm, which needs to be improved.

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