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Wavelength conversion device

A wavelength conversion device and wavelength conversion technology, applied in projection devices, optics, instruments, etc., can solve the problems of sharp drop in light output rate of reflective wavelength conversion devices, limited effective heat dissipation area, and inability to dissipate the heat of the fluorescent layer in time

Inactive Publication Date: 2021-03-30
DELTA ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing reflective wavelength conversion device only dissipates heat by adding a heat sink on the other side of the substrate relative to the reflective layer. The effective heat dissipation area is limited, and it is easily affected by the reflective layer with high thermal resistance. Under the condition of high-power excitation light , the heat generated by the excitation of the fluorescent layer by the excitation light source cannot be dissipated in time, so that the fluorescent layer continues to operate at high temperatures and deteriorates, which in turn causes the light output rate of the reflective wavelength conversion device to drop sharply

Method used

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Embodiment Construction

[0040] Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention can have various changes in different forms without departing from the protection scope of the present invention, and the description and drawings therein are only used for illustration in nature, not for limitation this invention.

[0041] figure 1 is a cross-sectional structure diagram of the wavelength conversion device according to the first embodiment of the present invention. figure 2 yes figure 1 Cross-sectional view of the P1 region in . image 3is a top view of the wavelength conversion device in the first embodiment of the present invention. In this embodiment, the wavelength conversion device 1 can be, for example but not limited to, a color wheel applied to a projector. The wavelength conversion device 1 includes a substrate 10 , a reflectiv...

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Abstract

A wavelength conversion device comprises a substrate, a reflection layer, a fluorescent layer and a heat conduction layer. The substrate has at least one surface. The reflecting layer is arranged on at least one surface of the substrate. The fluorescent layer is arranged on the reflecting layer and is provided with at least one conversion region for wavelength conversion; the heat conduction layeris arranged on at least one surface of the substrate, is directly connected with the at least one conversion region, and conducts heat generated by the at least one conversion region during wavelength conversion. The heat conduction layer is arranged adjacent to at least one side edge of the fluorescent layer, and the heat conduction layer can be directly connected to the conversion region, so that heat generated by the conversion region during wavelength conversion can be effectively dissipated. Meanwhile, reduction of wavelength conversion efficiency due to accumulation of heat in a conversion region caused by obstruction of a heat dissipation path due to high heat resistance of the reflecting layer is avoided.

Description

technical field [0001] The invention relates to a wavelength conversion device, in particular to a reflective wavelength conversion device for improving heat conduction efficiency. Background technique [0002] The wavelength conversion device uses, for example, a laser light source to excite phosphors to obtain predetermined monochromatic light or polychromatic light, and has been widely used in lighting sources, projection displays and other fields. Taking projection display as an example, the desired display color can be produced by using a laser light source to incident on the phosphor pink wheel. [0003] In projection display applications, the reflective wavelength conversion device is more widely used because of its higher utilization efficiency of light. The existing reflective wavelength conversion device mainly includes a substrate, a reflective layer and a fluorescent layer. The reflective layer is arranged between the substrate and the fluorescent layer. reflec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/00G03B21/20
CPCG02B26/008G03B21/204G03B21/16
Inventor 李日琪
Owner DELTA ELECTRONICS INC
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