Backlight module without light guide plate and LCD (liquid crystal display) device

Abstract

The invention discloses a backlight module without a light guide plate and an LCD (liquid crystal display) device. The backlight module without the light guide plate comprises light sources and a back plate. The light sources are fixed onto two side walls of the back plate, the middle of the back plate upwardly rises to form a semielliptical curved surface, reflective materials are coated on the outer side of the semielliptical curved surface, the vertical line of the center of each light source and a straight line perpendicular to the focus of the semielliptical curved surface are intersected on the semielliptical curved surface, and 1 / 2 light intensity lines of the light sources are intersected at a near endpoint of the semielliptical curved surface. The light sources can be evenly diffused, light utilization efficiency can be improved, and the light guide plate in a traditional LCD is omitted, so that cost is saved, the overall weight of the backlight module can be reduced, and the backlight module is thinned and is simple in structure and easy in realization.

Description

Technical field [0001] The invention relates to the field of backlight modules, and in particular to a backlight module and an LCD device with an LCD side-entry type light-incident and no light guide plate. Background technique [0002] Most of the current LCDs have light guide plates and the light input method is side or direct light. At present, there are a small number of LCDs without light guide plates on the market. The key technology of LCD without light guide plates is how to set the position and reflection of the light source How does the sheet lead the light from the front into an LCD with good uniformity. [0003] However, in the prior art, the positions of the light-emitting source and the reflective sheet of backlight modules such as LCD without a light guide plate are unreasonable, the uniformity of light derived from the front is not good, and the light utilization rate is not high. [0004] Therefore, the existing technology needs to be improved and developed. Summar...

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, the positions of the light emitting source and the reflector of the backlight module such as LCD without light guide plate are unreasonable, the uniformity of the light from the front is not very good, and the light utilization rate is not high.

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