Adjustment method and apparatus for light spot received by light valve

Abstract

The invention discloses an adjustment method and apparatus for light spot received by a light valve, and belongs to the laser projection field. The adjustment method comprises the steps of obtaining a temperature value of each point of at least one group of contrast points, wherein the contrast points are positioned on window glass of a light valve of a digital micromirror device (DMD) of an optical machine illumination system, and each group of the contrast points are positioned on midpoints of one group of opposite sides of the window glass; determining a temperature difference value of each group of the contrast points according to the temperature value of each point of at least one group of contrast points; and when the absolute value of the temperature difference value of each group of the contrast points is greater than a corresponding temperature threshold value, adjusting the position of the light spot on the light valve until the absolute value of the temperature difference value of each group of the contrast points is not greater than the corresponding temperature threshold value. By adoption of the adjustment method and apparatus, the problem of low precision in light spot adjustment is solved, and an image display effect is optimized. The adjustment method and apparatus are used for a digital light processing projector.

Description

technical field [0001] The invention relates to the field of laser projection, in particular to a method and a device for adjusting a light spot received by a light valve. Background technique [0002] A digital optical processing (English: Digital Light Processing; abbreviation: DLP) projector is integrated with a DLP projector, and the DLP projector is a high-precision projector that may include: a light source, an optical-mechanical lighting system, and a lens. [0003] Such as figure 1 As shown, in practical applications, the optical path of the optomechanical lighting system can be composed of a color filter wheel 01, a light guide 02, a lens group 03, a first reflector 041, a second reflector 042, a first lens 031, total internal reflection ( English: Ttotal Internal Reflection; abbreviation: TIR) lens 05, digital micromirror device (English: Digital Micromirror Device; abbreviation: DMD) 06, wherein, DMD is the core component of the DLP projector, is a kind of light ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the lack of measurement of the matching relationship between the light valve and the light spot in the prior art, which leads to low adjustment accuracy of the light spot received by the light valve and not intuitive enough, the present invention provides a method and device for adjusting the light spot received by the light valve

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