Laser backlight device for display system

Abstract

The invention discloses a laser backlight device for a display system. The laser backlight device comprises at least one set of backlight generating assembly, wherein each set of backlight generating assembly comprises an incident laser mechanism, and each set of backlight generating assembly further comprises a lens, a planar reflecting mirror plane and a conical mirror plane, wherein the lens is used for collimating and shaping an incident laser beam of the incident laser mechanism into a first quasi-parallel laser beam; the planar reflecting mirror plane is used for reflecting the first quasi-parallel laser beam and turning the first quasi-parallel laser beam into a second quasi-parallel; and the conical mirror plane is used for diverging the second quasi-parallel light beam into a backlight. The laser backlight device for the display system only comprises the lens, the planar reflecting mirror plane and the conical mirror plane, the occupied space is small, so that the thickness of a display screen can be reduced; and meanwhile, the conical mirror plane can be used for enabling the incident light beam to be diverged by 180 degrees, the reflection efficiency is high, the divergence angle is large, and the requirement of the backlight source of a large-size display screen can be met.

Description

technical field [0001] The invention relates to laser technology, in particular to a laser backlight device for a display system. Background technique [0002] At present, in the field of display, backlight sources include organic light-emitting diodes (OLEDs), quantum dots (QLEDs) and lasers. Among them, lasers as light sources have the characteristics of monochromaticity, coherence, high brightness, and long life. It can be as high as more than 90% of the color gamut of the human eye, which is a level higher than the highest 62% color gamut coverage of LED displays. The higher color gamut coverage makes the display screen look more real, transparent and layered. [0003] The disadvantage of the existing technology is that the laser light source used for display is usually a front-projection method, and the laser light source needs to be kept at a certain distance from the front-projection screen. Therefore, the whole device needs to occupy a certain front space, which can...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the existing technology is that the laser light source used for display is usually a front-projection method, and the laser light source needs to be kept at a certain distance from the front-projection screen. Therefore, the whole device needs to occupy a certain front space, which cannot meet the thin thickness of the display screen. Requirements, in addition the laser backlight source in the prior art adopts cylindrical mirror and a word wave mirror as the light divergence element, but the lateral maximum divergence angle of the cylindrical mirror and the word wave mirror can only be 120 degrees, the degree of divergence has certain limitations

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