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Light source for projection device and projection device including same

A technology of projection equipment and light source, which is applied in the field of projection, can solve the problems of low luminous efficiency of light, insufficient color ratio, and color index that does not meet digital movies, etc., and achieves the effect of high purity and improved color characteristics

Active Publication Date: 2017-11-07
APPOTRONICS CORP LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited luminous efficiency of light-emitting diodes, the luminous efficiency of some wavelengths of light is low, resulting in insufficient proportion of some colors in the synthesized light. Therefore, the color index of the light source used for projection equipment in the prior art has not reached Digital Cinema Initiatives (DCI) Requirements

Method used

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  • Light source for projection device and projection device including same
  • Light source for projection device and projection device including same
  • Light source for projection device and projection device including same

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Embodiment Construction

[0036] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0037] figure 1 A light source 20 for a projection device according to the invention is shown.

[0038] The light source 20 includes a blue light source for emitting blue light, a red light source for emitting red light, and a wavelength conversion layer 27 having a wavelength conversion material capable of emitting green light when excited by blue light. The specific form of the wavelength conversion layer 27 may be green phosphor.

[0039] In a preferred embodiment, the wavelength conversion layer 27 is provided with a fluorescence collection mechanism 28 for collecting discrete fluorescence, which improves the utilization rate of light energy.

[0040]The blue light source and the red light source are integrated into a light source array 21 . image 3 A preferred embodiment of light source array 21 is shown. refer to image 3 , preferably, the red light ...

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Abstract

The invention brings forward a light source applied to a projection device, and a projection device comprising the same, and belongs to the technical field of projection. The light source comprises a blue light source emitting blue light; a red light source emitting red light; a wavelength conversion layer provided with a wavelength conversion material capable of emitting green light under excitation of the blue light; and a light splitting and compounding assembly for guiding a part of the blue light to excite the wavelength conversion material to generate green light and performing light composition on the residual blue light, the red light emitted by the red light source and the green light emitted by the wavelength conversion layer to generate white light. The device provided by the invention comprises the light source. The white light needed by the projection device can be generated in such a way. According to the invention, the color characteristics of the light source can be greatly improved, the index requirement of a DCI is met, and the light source provided by the invention can enter a cinema to replace a conventional light source.

Description

technical field [0001] The present invention relates to the field of projection technology, in particular to a light source for a projection device and a projection device including the same. Background technique [0002] In recent years, projectors and projection TVs have developed rapidly, and the market is optimistic. Projectors for business use are developing in the direction of small size, light weight and high efficiency. With its high-definition and large-screen advantages, projection TV is being vigorously developed by major home appliance companies in the world. Professionals predict that with the popularization of products and the reduction of costs, projection TV will become the mainstream of large-screen TVs for families. The key component of passive light-emitting projectors and projection TVs - the light source, has also received great attention from related industries. [0003] Laser light source mainly refers to the electric light source that uses excited ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G03B21/00G02B27/10
CPCG03B21/2013G03B21/204G03B21/2066
Inventor 胡飞侯海雄
Owner APPOTRONICS CORP LTD
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