Projecting lighting system and projecting lighting method thereof

Abstract

The present invention relates to projection lighting system. It includes a light-conducting pipe and an optical circuit switching device with light-receiving region, The light-conducting pipe is placed in the optical cirucit between light source and optical circuit switching device. The light beam emitted by means of end face of light-conducting pipe can be income into the light-receiving region in the mode of that said light beam and plane normal of light receiving region are formed into a certain angle, and its producted projection pattern form can produce a tension change relatively to light-conducting pipe end face form along said off-axis angle change direction, and the end form of ligh- conducting pipe is a parallegram whose inner angle along off-axis angle direction is larger than adjacent inner angle.

Description

technical field

[0001] The invention provides a projection lighting system, in particular a projection lighting system which can effectively improve lighting efficiency. Background technique

[0002] The principle of the existing optical projection display is to project the light beam emitted by the light source to an optical path switching device. The optical path switching device has a plurality of tiny optical path switching elements that can switch the optical path. These tiny optical path switching elements are combined into an image, and then passed through the projection system to project to the display screen. Take the Digital Micromirror Device (DMD) manufactured by Texas Instruments (TI) as an example. It is composed of multiple micromirrors. By selectively controlling the mirrors at two different inclination angles, the beam passes through The two states of the transmissive projection system (that is, the bright state mode) and the non-transparent projection syst...

Images