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Wavelength conversion element, light source device, and projector

一种波长转换元件、波长转换的技术，应用在放映装置、电气元件、光学元件等方向，能够解决激发光照度分布不均匀、荧光发光效率降低等问题

Active Publication Date: 2021-03-23
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the light source device described above, the illuminance distribution of the excitation light irradiated to the phosphor becomes non-uniform.
In addition, since excitation light is locally irradiated to a specific region of the phosphor, the phosphor generates heat, resulting in a decrease in fluorescence emission efficiency.

Method used

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  • Wavelength conversion element, light source device, and projector
  • Wavelength conversion element, light source device, and projector
  • Wavelength conversion element, light source device, and projector

Examples

Experimental program
Comparison scheme
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no. 1 Embodiment approach

[0024] Next, use Figure 1 ~ Figure 3 A first embodiment of the present invention will be described.

[0025] In addition, in each of the following drawings, in order to facilitate the observation of each component, dimensions may be shown on a different scale depending on the component.

[0026] First, an example of a projector according to this embodiment will be described.

[0027] figure 1 It is a figure showing the schematic structure of the projector of this embodiment.

[0028] Such as figure 1 As shown, the projector 1 of this embodiment is a projection type image display device that displays a color image on a screen SCR. Projector 1 has illumination device 2 , color separation optical system 3 , light modulation device 4R, light modulation device 4G, light modulation device 4B, synthesis optical system 5 , and projection optical device 6 . The configuration of the lighting device 2 will be described later.

[0029] The color separation optical system 3 includes...

no. 2 Embodiment approach

[0093] Below, use Figure 4 A second embodiment of the present invention will be described.

[0094] The structure of the projector and the lighting device of the second embodiment is the same as that of the first embodiment, and the structure of the wavelength conversion element is different from that of the first embodiment. Therefore, descriptions of the projector and the lighting device as a whole are omitted.

[0095] Figure 4 It is a cross-sectional view of the wavelength conversion element 140 of this embodiment.

[0096] Such as Figure 4 As shown, the wavelength conversion element 140 includes a bonded body 141 and a reflection member 42 . The bonded body 141 of this embodiment is constituted by bonding a first phosphor layer (first wavelength conversion member) 143 , a second phosphor layer (second wavelength conversion member) 144 , and a light guide member 44 .

[0097] The first phosphor layer 143 and the second phosphor layer 144 have the same structure as ...

no. 3 Embodiment approach

[0103] Below, use Figure 5 A third embodiment of the present invention will be described.

[0104] Figure 5 It is a cross-sectional view of the wavelength conversion element of this embodiment.

[0105] Such as Figure 5As shown, the wavelength conversion element 70 of this embodiment includes a bonded body 71 and a reflection member 42 . The bonded body 71 of the present embodiment is constituted by bonding the phosphor layer 43 , the first light guide member 72 , and the second light guide member 73 .

[0106] The first light guide member 72 and the second light guide member 73 have the same configuration as the light guide member 44 of the first embodiment. The first light guide member 72 includes a second bonding surface (second surface) 72a parallel to the first direction D1 and a surface 72b facing opposite to the second bonding surface 72a. The second light guide member 73 includes a second bonding surface 73a parallel to the first direction D1 and a surface 73b ...

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Abstract

Disclosed are a wavelength conversion element, a light source device, and a projector capable of inhibiting decrease in wavelength conversion efficiency caused by temperature rise. The wavelength conversion element according to the present disclosure includes a cemented body obtained by bonding a first wavelength conversion member which is excited by first light to emit second light having a wavelength band different from a wavelength band of the first light, and a first light guide member configured to transmit the first light and the second light, and a reflecting member which is disposed soas to be opposed to at least one surface parallel to a first direction out of a plurality of outer circumferential surfaces of the cemented body, and reflects at least one of the first light and thesecond light.

Description

technical field [0001] The present invention relates to a wavelength conversion element, a light source device, and a projector. Background technique [0002] A light source device is proposed that irradiates a phosphor with excitation light emitted from a light source, and uses fluorescence emitted from the phosphor as illumination light. In the following patent document 1, it is disclosed that fluorescence is generated by making excitation light incident from the first surface of the light guide body incident on the phosphor disposed on the second surface side of the light guide body opposite to the first surface, and from The end face of the phosphor extracts a light source device including excitation light and fluorescent illumination light. [0003] Patent Document 1: Specification of US Patent No. 8779995 [0004] However, in the light source device described above, the illuminance distribution of the excitation light irradiated on the phosphor becomes non-uniform. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/2066G03B21/208H04N9/3158H04N9/3167H04N9/3105G02B27/283G03B21/2033H04N9/3152G02B27/0977G02B27/0955
Inventor 中村典生
Owner SEIKO EPSON CORP