Laser projection system

Abstract

The invention relates to a laser projection system which comprises a projection screen and a laser projector, wherein the projection screen comprises at least one light emitting layer, and the light emitting layer comprises at least one light emitting substance which can be excited to generate excited light in another wavelength range when irradiated by exciting light in a wavelength range; the transverse distances between the light emitting substances parallel to the plane of the projection screen are far shorter than the cross section diameter of a laser beam; and the laser projector comprises a laser light source module, a laser signal modulation module, a light combining module, a rotary plane mirror module, a rotary plane mirror control module and a signal conversion module. In the invention, exciting laser is generated according to an image signal of a single picture or a dynamic picture and projected to the matched projection screen to generate an image so as to ensure that a high-recognition projection picture can be presented on the projection screen under natural light environment through a nearly transparent effect, and a user can see the projected picture and an objectbehind the projection screen at the same time so as to promote the use efficiency and the application range of the laser projection system.

Description

technical field [0001] The present invention relates to a laser projection system, especially a laser projector that uses a single image or a dynamic image signal to generate excitation laser light and project it onto a matching projection screen to generate an image. The projection screen can present a highly recognizable projection picture with almost transparent effect under the environment of natural light, so that people can see the projection picture and see the objects behind the projection screen at the same time. Background technique [0002] There are many previous technologies related to the design of laser projection systems, including US6,986,581, US7,090,355, US7,182,467, US7,213,923, US7,452,082, etc., which disclose related technologies of films used as projection screens; Including US6,843,568 and its references (References Cited) and other public information are related technologies for disclosing laser scanning display devices (laser scanning display); for...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned laser projection technology has the following disadvantages: First, in order to use the scattering principle to form an image, the display screen is opaque, so this imaging technology is limited in applications that require a transparent display screen, such as projecting images on driving The vehicle head-up display of the windshield in front of the seat; second, due to the deflection angle θ of the rotating plane mirror module and limited, the distance D between the projection screen and the laser projector must be elongated to produce a larger projection screen; third, when the visible light in the background light hits the display screen, it will also be scattered by the screen or The reflection is received by the observer, which reduces the color contrast of the imaging picture

Images