Projection system

Abstract

In order to obtain the following effects: that is, increase the brightness of the image, miniaturization, low cost, ease of operation, avoidance of failure, and ease of assembly. These effects can be obtained by a projection system comprising: at least one light-emitting device; time-divided light supply means, which time-divides light emitted from said at least one light-emitting device and supplies the light; a first condensing lens that concentrates light passing through the time-division supply device for light; a first reflector that reflects light passing through the first condensing lens; integrating an integrator, which makes the light reflected from the first mirror into a plane light; a second mirror, which reflects the light passing through the integrator; a third mirror, which The DMD side reflects the light reflected from the second reflector; and a projection lens that projects the light reflected from the second reflector onto a screen and has an optical axis, the second reflector and the third reflector The mirrors are respectively placed on both sides of the optical axis.

Description

technical field [0001] The invention relates to a projection system. Background technique [0002] A projection system is a device that carries image signals on light emitted from a light emitting device, projects the image signals on the front or rear surface of a screen, and allows a viewer to see them. For the projection system, there are CRT schemes, digital micromirror device schemes, Lcos schemes, transmissive LCD schemes, etc. according to operation schemes. [0003] As a conventional example of a projection system, there is WO 99 / 64912A1 (hereinafter referred to as cited document). This cited document discloses a scheme in which light emitted from red, green and blue light-emitting diodes is synthesized by a prism and transmitted to a display device such as an LCD display. Furthermore, the prism is placed around a display device (such as an LCD or DMD) forming image signals and used to synthesize these image signals. [0004] However, this solution using prisms re...

AI Technical Summary

Problems solved by technology

[0004] However, this solution using prisms reduces brightness due to light loss that occurs when light passes through the boundaries of each glass structure constituting the prisms, increases the size of the projection system due to the use of prisms with a large volume, increases material Costly and difficult to assemble, inconvenient to control the optical axis accurately, and requires correction of the optical axis when the optical axis deviates during use, etc.

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