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Method for converting light wavelength with emission angle selectivity characteristic

A technology of light wavelength conversion and characteristic selection, which is applied to optical elements used to change the spectral characteristics of emitted light, semiconductor devices of light-emitting elements, light sources, etc., can solve the problems of increasing the output brightness of unfavorable light sources, and achieve low cost, Easy-to-implement, brighter light output effects

Active Publication Date: 2009-09-23
APPOTRONICS CORP LTD
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Problems solved by technology

[0007] The disadvantages of the above-mentioned prior art are: while using the fluorescent conversion film to bring the advantages of structural simplification to the light source, the existing light source does not consider how to improve the fluorescent conversion efficiency, which is not conducive to the improvement of the output brightness of the light source

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  • Method for converting light wavelength with emission angle selectivity characteristic
  • Method for converting light wavelength with emission angle selectivity characteristic
  • Method for converting light wavelength with emission angle selectivity characteristic

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Embodiment Construction

[0027] Below, the present invention is further described in conjunction with the preferred embodiments shown in the accompanying drawings.

[0028] The light source involved in the present invention includes at least excitation light, and a wavelength conversion layer including a wavelength conversion material. The excitation light can come from various forms of light emitting sources such as but not limited to LEDs, laser sources or traditional light sources such as arc lamps. The wavelength converting material includes fluorescent powder, dye or nano-luminescent material, or a mixture of two or more of these materials. The wavelength conversion layer may be composed of colloid containing the wavelength conversion material. For the convenience of description, if there is no other explanation, phosphor powder will be used as an example to refer to the wavelength conversion material in the embodiments of the present invention. figure 1 The working principle of the optical wav...

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Abstract

The invention relates to a method for converting light wavelength with emission angle selectivity characteristic, which is applied to a light source and comprises the following steps: guiding exciting light to emit to a wavelength conversion layer (1) comprising a wavelength conversion material so as to excite the excited light; particularly, mounting a medium film / sheet (3) with a smaller refractive index on at least one side of the wavelength conversion layer (1) to reflect back emergent rays with large angles in the wavelength conversion layer (1) by using total reflection phenomena; and mounting an angle selection light-filtering film / sheet (2) on the light source output side of the wavelength conversion layer (1) to only let out the excited light of which the angle is smaller than a preset emergence angle, and mounting a reflecting film / sheet (5) on the other side. Thus, with the method, the fluorescence conversion efficiency of the light source is improved, the light output brightness or the intensity of the light source is improved while the structure of the light source is simplified; and the method has the advantages of low implementation cost and easy implementation.

Description

technical field [0001] The invention relates to an optical structure of a light source, in particular to a method for controlling light intensity or direction by a light wavelength conversion device. Background technique [0002] The application of light sources is more and more diverse, such as for image projection, take rear projection TV (RPTV) or front projector as an example; or for transportation vehicles, take headlights or lights of cars, ships or airplanes as an example ;......Different applications have different requirements for the color of the light source. For example, stage lighting needs to have different colors; the color temperature of the light source used in the projection display field can vary from 6500K to 11000K. [0003] Existing light sources with a specific color or color temperature, such as white light sources, generally rely on the main technical solutions for realizing RGB light mixing solutions and fluorescent conversion solutions. The RGB l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V13/00F21V9/08F21V7/00F21V5/00F21Y101/02F21Y115/10
Inventor 李屹杨毅
Owner APPOTRONICS CORP LTD
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