Integrated microdisplay projection and imaging system

Abstract

An integrated microdisplay projection and imaging system includes: a focus-adjustable lens system, a planar polarization beam splitter, a reflective polarization modulation imager and an imaging sensor with a post polarizer in orthogonal polarization orientation to the planar polarization beam splitter, as well as a lighting module. Placed on two separate sides of the planar polarization beam splitter, the reflective polarization modulation imager and the imaging sensor have substantially equal-length optical passes through the planar polarization beam splitter to the focus-adjustable lens system, and thus the focus-adjustable lens system provides a unified means for adjusting focus with both the reflective polarization modulation imager and the imaging sensor, relative to an external object such a projection screen or an imaging object.

Description

technical field [0001] The invention relates to an integrated optical system, comprising a single-panel micro-display imager and an imaging sensor, capable of both projection display and image sensing. Background technique [0002] The growing demand for portable digital displays on cell phones and other handheld devices has led to the emergence and expansion of the market for miniature or pico projectors, which use a simple but single-panel-based Miniature display imager (such as: Digital Light Processing (Digital Light Processing, referred to as: DLP) and silicon-based liquid crystal (Liquid Crystal On Silicon, referred to as: LCOS)) and miniature light source (such as: light emitting diode (Light Emitting Diode, referred to as: LED) and laser) reflective projection optical engine. There is further interest in integrating miniature cameras into such portable display systems, not only to downsize and / or simplify handheld electronic systems, but also to collaborate and expa...

AI Technical Summary

Problems solved by technology

Since most of the imaging light passing through the projection lens from an external object passes through the TIR rather than being reflected to the imaging sensor, simply placing the imaging sensor opposite the DLP imager on the other side of the TIR does not Optical path management requirements for imaging through adjustable focus projection lenses and TIR to the imaging sensor

Existing LCOS micro-display post-projection display systems including image sensors for adjusting projected images require optical design and integration of two opposing subsystems, especially in terms of anti-optical interference and crosstalk effects, which have not been able to solve the above problems

Images