Lamp optical system for projected display of 3-LCOS (Liquid Crystal On Silicon) laser

Abstract

The invention discloses a lamp optical system with an integrated area light source module for projected display of 3-LCOS (Liquid Crystal On Silicon) laser. The system comprises a red light path, a blue light path and a green light path which are formed by two independent light paths, wherein light generated by a red light source projects needed light spots on an LCOS chip through one independent light path, and light generated by blue and green light sources share the other independent light path to project the needed light spots on the LCOS chip. The lamp optical system disclosed by the invention is different from the conventional projection lighting optical structure, and the area light source module of the lamp optical system has the functions of beam shaping and light spot homogenizing simultaneously, so that under the circumstance of same power output, the optical structure of the optical system is simplified, the system volume is reduced, and the efficiency for solar energy utilization of the system is enhanced.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a 3-chips-liquid crystal on silicon (3-LCOS) laser projection display illumination optical system. Background technique [0002] The light source in projection display is an important part of the display system. Its luminous efficiency, luminous form, and light source shape, spectrum, and life all directly determine the quality of the projection display system. In the color projection display, the laser is used as the red, green and blue (RGB) three-color light source, which has high light source efficiency, good image layering, high color saturation, low brightness and high contrast. Laser display has become the development direction and mainstream trend of display technology in the future. [0003] In the existing lighting optical path, the light source needs to pass through the beam shaping system, then through the spot homogenization device—usually using a compound eye or i...

AI Technical Summary

Problems solved by technology

[0005] If the fly-eye lens group is used as the homogenizing device, it is necessary to ensure that the light beam after the light source is shaped as a near-collimated beam is projected onto the fly-eye lens. The fly-eye lens needs to be designed together with the follow-up system according to the mechanical structure of the lighting system, not only It is necessary to analyze and calculate the etendue, and to optimize the optical parameters such as the size, numerical aperture, and focal length of the compound eye mirror, and sometimes to design the compound eye eccentrically. The design process is more complicated than that of the integrating rod system.

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