Light-guide structure, direct type backlight module and display panel

Abstract

The invention relates to the technical field of display, and provides a light-guide structure. The light-guide structure comprises a first waveguide layer, a polarization beam splitting structure, a first polarization coupling grating, a second waveguide layer and a second polarization coupling grating; the first waveguide layer is provided with a first light entry surface and a first light exit surface; the polarization beam splitting structure is arranged on the first light exit surface and used for dividing the light given out by a light source into first polarized light and second polarized light; the first polarization coupling grating is arranged on the first light entry surface and used for deflecting the first polarized light, so that the first polarized light is totally reflectedin the first waveguide layer; the second waveguide layer is provided with a second light entry surface and a second light exit surface and arranged above the polarization beam splitting structure; thesecond polarization coupling grating is arranged between the second light entry surface and the polarization beam splitting structure and use for deflecting the second polarized light, so that he second polarized light is totally reflected in the second waveguide layer. When the light-guide structure is used, no light mixing distance exists, and the light and thin design of the light-guide structure is facilitated.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a light guiding structure, a direct-type backlight module installed with the light-guiding structure, and a display panel equipped with the direct-type backlight module. Background technique [0002] With the rapid expansion of the LED liquid crystal display product market, consumers have higher and higher requirements for LED liquid crystal TVs. No matter in terms of image quality experience or appearance design, LED liquid crystal TV manufacturers are required to constantly make new breakthroughs. LED backlight modules are mainly divided into two types: edge-lit and direct-lit. The edge-lit LED backlight has the advantage of being thinner and lighter, but the image quality cannot achieve the desired effect; while the direct-lit LED backlight can take advantage of its own advantages, through the regional dynamic Control (local dimming) to optimize the picture quality, but the d...

AI Technical Summary

Problems solved by technology

However, as a light-transmitting display device, LCD needs a backlight to provide the brightness required for display; for most liquid crystal displays, the backlight is always on and due to the limitation of its own characteristics, there are problems such as light leakage to varying degrees; This will affect the performance of dark details and contrast issues

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