A direct type zero od backlight structure with semi-reflective and semi-transparent light guide plate

Abstract

The invention discloses a direct-down zero OD backlight structure with a semi-reflective and semi-transparent light guide plate. The upper end surface of the back plate is provided with a rectangular groove, and the inner bottom wall of the rectangular groove is coated with a white reflective layer. The white An LED light source is fixedly connected to the reflective layer, a semi-reflective and semi-transparent light guide plate is fixed on the LED light source, a lower diffusion film is fixed on the semi-reflective and semi-transparent light guide plate, and a prism film is fixed on the lower diffusion film. The above-mentioned prism film is fixed with an upper diffusion film, and the semi-reflective and semi-transparent light guide plate is made of PS material, which has lower weight and lower cost. Due to the improvement of light effect haze, the diaphragm can be reduced correspondingly, further reducing the cost. The invention has the advantages of side-entry type light and thin, the total thickness does not exceed 8mm, and has excellent shielding performance, OD is close to 0, can improve the utilization rate of light, avoid light leakage, and can realize curved surface display, which meets the development needs of light and thin. The present invention also has the advantage of the direct entry type, which can realize zone dimming, and the light output mode is higher in brightness than the side entry type.

Description

technical field [0001] The invention relates to the related technical field of backlight structures, in particular to a direct-type zero-OD backlight structure with a semi-reflective and semi-transparent light guide plate. Background technique [0002] The backlight structure is a backlight light source component in LCD display products. It generally consists of a backlight light source, multi-layer backlight materials and a support frame. The light emitted by a traditional backlight light source will only have 60% after passing through the reflective film diffusion film. When light enters the polarizing film, the light loss is high. Common structures include direct-type backlight structure and side-type backlight structure. [0003] The direct-type backlight has a simple process and does not require a light guide plate. The LED array is placed at the bottom of the light box. The light emitted from the LEDs is reflected from the bottom and sides, and then evenly emitted thr...

AI Technical Summary

Problems solved by technology

The disadvantage is that because the light source is placed on the side of the light guide plate, the number of LEDs and the brightness are limited, and the light still needs to be evenly dispersed on the entire plane. When the panel area is larger, the brightness of the light source is more limited, and the optical design is more difficult. And the manufacturing cost is relatively high, and it is impossible to control light in different areas

Images