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Projection display system

A technology of projection display and phosphor, which is applied in the field of projection display, can solve the problems of mercury poisoning and insufficient brightness of LED light source, etc., and achieve the effect of long fluorescent life and high efficiency

Inactive Publication Date: 2015-05-20
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] At present, the ultra-high pressure mercury lamp (UHP) is the mainstream light source of the projection display system, but the life of the UHP lamp is only 3000 hours, and the mercury is poisonous
Therefore, people have been looking for an alternative light source. The new light source LED light source has the advantages of long life and non-toxicity, but the brightness of the LED light source is insufficient, especially the green light is the bottleneck of projection display.

Method used

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Embodiment Construction

[0016] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the specific implementation of the projection light source and projection display system of the present invention will be described below in conjunction with the accompanying drawings.

[0017] figure 1 It is a structural schematic diagram of the embodiment of the projection display system involved in the present invention.

[0018] Such as figure 1 As shown, a projection display system 100 is used to project images on a screen, and includes a fluorescent projection light source 10 , a light transfer unit 20 , a light valve 30 and a projection lens 40 .

[0019] The fluorescent light source 10 includes a laser 11 , a collimating lens 12 , a filter 13 , a focusing lens 14 and a phosphor plate 15 .

[0020] Laser device 11, collimating lens 12, filter plate 13, focusing lens 14 and phosphor powder board 15 are arranged on the optical path of laser and ...

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Abstract

The invention relates to a projection display system. A fluorescent light source is provided with a laser device, a collimation lens, a filter, a focusing lens and a fluorescent powder plate. The projection display system has the advantages that the laser emitted by the laser device is used for exciting fluorescent powder to generate fluorescent light, and the fluorescent light is used as a light source of the projection display system; as the brightness of the fluorescent light generated by the fluorescent powder is related to the intensity of the exciting light source, and the higher the intensity of the exciting light source is, the higher the brightness of the fluorescent light generated by the fluorescent powder is, the brightness of the fluorescent light source generated by the laser exciting is higher than the brightness of an LED (light emitting diode) light source, and the problem of insufficient light emitting brightness of the LED light source is solved; the project display system is provided with a light equalizing element, so the problem of nonuniform display of the screen is solved, the long axis of an incident elliptical fluorescent light beam is the same as the length direction of a light valve effective area, and the maximum equalizing efficiency is realized.

Description

technical field [0001] The invention relates to a projection display system, belonging to the technical field of projection display. Background technique [0002] At present, the ultra-high pressure mercury lamp (UHP) is the mainstream light source of the projection display system, but the life of the UHP lamp is only 3000 hours, and the mercury is poisonous. Therefore, people have been looking for an alternative light source. The new light source LED light source has the advantages of long life and non-toxicity, but the brightness of the LED light source is insufficient, especially the green light is the bottleneck of projection display. Contents of the invention [0003] The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a projection display system having a high-brightness and long-life light source. [0004] The present invention adopts the following structures in order to achieve the above object....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G03B21/14
CPCG03B21/204G03B21/208
Inventor 龙涛杨毅
Owner UNIV OF SHANGHAI FOR SCI & TECH