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Projection device

A technology of projection device and front projection, which is applied in the direction of projection device, optics, lens, etc., and can solve the problems such as the influence of projection picture quality

Inactive Publication Date: 2012-08-01
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation will affect the quality of the projected picture

Method used

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  • Projection device

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 As shown, the projection device 10 provided by the preferred embodiment of the present invention includes a light source 12 , three digital micromirror devices (Digital Micromirror Device, DMD) 11 , a condenser lens 18 and a projection lens 16 . In this embodiment, the projection device 10 is a digital light processing (Digital Lighting Process, DLP) projection device.

[0020] The light source 12 is used to emit light to the DMD 11 . In this embodiment, the light source 12 is a white light source such as a white LED.

[0021] Three digital micromirror devices 11 are used to reflect red light, green light and blue light respectively. Each digital micromirror device 11 includes a plurality of micromirrors arranged in an array. Each digital micro-mirror device 11 controls the deflection of each micro-mirror so that ea...

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PUM

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Abstract

The invention provides a projection device, wherein the projection device comprises a light source, three digital micromirror devices and a projection lens. The light source is used to emit light to the three digital micromirror devices. Each of the digital micromirror devices comprises a plurality of micromirrors. The projection lens is used to project light to a projection screen. Each of the micromirrors is used to selectively reflect light to the projection lens. Each of the digital micromirror devices is provided with a condenser lens, wherein each of the condenser lenses is located between the corresponding digital micromirror device and the projection lens. In the projection device provided in the invention, light beams reflected by the micromirrors are narrowed after focused by the condenser lenses, such that the volume of the projection lens can be reduced and projection accuracy of the reflected light can be enhanced, thereby projection picture quality is improved.

Description

technical field [0001] The invention relates to a projection device, in particular to a digital light processing projection device. Background technique [0002] With the thinner, thinner and smaller consumer electronic products, projection devices tend to be miniaturized, and palm-sized or portable projection devices extend projection devices from meeting and business purposes to home and leisure applications. [0003] Generally, miniature projectors can be classified into Digital Lighting Process (DLP) projectors and Liquid Crystal On Silicon (Liquid Crystal On Silicon) projectors. The DLP projector includes a digital micromirror device (Digital Micromirror Device, DMD) having a plurality of micromirrors arranged in an array. Each micro-mirror is respectively used to selectively reflect light to the projection lens. [0004] However, when the micro-mirror reflects light, if the angle is slightly deviated, it will directly reflect the light to the projection screen. That...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14G03B21/28G03B21/20G02B3/08
Inventor 黄雍伦
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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