Reflecting lens, backlight module using reflecting lens and display device

Abstract

The invention provides a reflecting lens, a backlight module using the reflecting lens and a display device, wherein the reflecting lens comprises a lens body having a reverse frustum shape; a larger-area first surface of the lens body is a light-emergent surface; a groove is arranged on the first surface; a first side wall and a second side wall of the groove are opposite to each other; a second surface and two side surfaces are reflecting surfaces; the backlight module comprises a diffuser plate and a light source device; the light source device comprises the reflecting lens provided by the invention and a light source arranged in the groove of the reflecting lens; and the display device provided by the invention comprises the backlight module using the reflecting lens provided by the invention. The reflecting lens provided by the invention can be excellently applied to a straight falling type backlight module as well as a corner type backlight module. The backlight module using the reflecting lens provided by the invention achieves an effect of increasing a light-emergent angle, is matched with a downward illuminating light source and has better light-emergent quality. The backlight module provided by the invention is adopted by the display device provided by the invention, so that the display quality is greatly increased.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a reflective lens, a backlight module using the reflective lens and a display device. Background technique [0002] The backlight module is one of the important components of the liquid crystal display. Since the liquid crystal itself does not emit light, the function of the backlight module is to supply sufficient brightness and evenly distributed light source, so that the liquid crystal display can display images normally. At present, the display technology of liquid crystal display has become mature, especially in the design of the backlight module. In addition to being used in liquid crystal display devices such as liquid crystal displays and liquid crystal televisions, backlight modules can also provide light sources for display devices such as digital photo frames, electronic paper, and mobile phones. [0003] At present, the design of the LED backlight module basically a...

AI Technical Summary

Problems solved by technology

In the transmissive LED backlight module, there are the following problems: First, in the structure of the LED backlight module: with the demand for the power consumption of the LED backlight module continues to decline, there are corners on the market. The structure of the LED backlight module, the most prominent feature of the corner-type LED backlight module is that it greatly reduces the number of LEDs used, but the corner-type LED backlight module requires a wide light-emitting surface, so the required LED long and narrow

However, this kind of long and narrow LED has a high PN junction temperature, and the power is relatively large, and the light incident surface of the light guide plate is prone to defects such as melting and deformation due to long-term heating.

Secondly, in the structure of LED direct-lit backlight modules: At present, there is a research and development plan to replace CCFL with LED light strips in the market, but in order to make up for the shortcomings of LED light-emitting angles, it is necessary to add a circular secondary lens to diffuse and uniform light. , but the price of this secondary lens is quite expensive, and the circular secondary lens can only achieve one-to-one matching with LEDs, and cannot achieve one-to-many matching. With the increase in the size of the backlight module and the brightness requirements As the number of LEDs increases, the number of such circular secondary lenses also increases accordingly, making it difficult to achieve cost reduction

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