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Light source device and projector

一种光源装置、发光部的技术，应用在激光器装置、半导体激光器装置、放映装置等方向，能够解决隐患、介质流动停滞、显示品质降低等问题，达到抑制制造成本、易于控制、提高变换效率的效果

Inactive Publication Date: 2008-12-17
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, more vivid interference fringes than ultra-high pressure mercury lamps appear, resulting in greatly reduced display quality
[0008] Furthermore, in the configuration of cooling a plurality of nonlinear optical crystals described in Patent Document 2, there is a possibility that the flow of the medium near the nonlinear optical crystal disposed on the end side among the plurality of nonlinear optical crystals may stagnate, and it is difficult to change multiple nonlinear optical crystals to a specified temperature
As a result, the light conversion efficiency of the nonlinear optical crystal decreases

Method used

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Experimental program
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no. 1 Embodiment approach

[0057] Refer to Figure 1 to image 3 A first embodiment of the present invention will be described.

[0058] FIG. 1 is a diagram showing a schematic configuration of a light source device, figure 2 It is a perspective view in which the wavelength selection element 13 of the light source device is omitted and the wavelength conversion element unit 20 is simplified, image 3 It is a perspective view of the wavelength conversion element. 1 shows only the optical path of the laser light emitted from one emitter for easy description of the optical path diagram of the light emitted from the semiconductor laser element to the wavelength selection element.

[0059] The light source device 10 of the present invention, as shown in FIG. The converted light and select the wavelength selective element 13 that reflects the light of the unconverted wavelength. In addition, the wavelength conversion element unit 20 includes four wavelength conversion elements 21 .

[0060] In the semicon...

no. 2 Embodiment approach

[0114] Next, a second embodiment of the present invention will be described with reference to FIG. 4 . In addition, in the drawings of the respective embodiments described below, the same reference numerals are attached to the same configuration as the light source device 10 of the first embodiment described above, and description thereof will be omitted.

[0115] In the light source device 40 of this embodiment, it differs from 1st Embodiment in the arrangement|positioning of the inlet 41a and the outlet 41b. Other configurations are the same as those of the first embodiment.

[0116] The inlet 41 a is provided on the left end surface 22 c of the holding member 22 , and the outlet 41 b is provided on the right end surface 22 d of the holding member 22 . That is, the inlet 41 a and the outlet 41 b face the housing space K of the holding member 22 and are formed in a direction parallel to the array direction of the wavelength conversion elements 21 (a direction perpendicular t...

no. 3 Embodiment approach

[0126] Next, a third embodiment of the present invention will be described with reference to FIG. 5 .

[0127] The light source device 50 of this embodiment is different from the first embodiment in that one wavelength conversion element 55 is used corresponding to one emitter 11 a. Other configurations are the same as those of the first embodiment.

[0128] In the semiconductor laser element 51, as shown in FIG. 5, eight emitters 51a are arranged in a row. In addition, the wavelength conversion element 55 is arranged to face each of the eight emitters 51a. Furthermore, the cross-sectional area of ​​the wavelength conversion element 55 is such that a spot of light emitted from one emitter 51a can enter, and is smaller than the cross-sectional area of ​​the wavelength conversion element 21 of the first embodiment. Thus, in the holding member 52 of the present embodiment, eight wavelength conversion elements 55 are used more than the holding member 22 of the first embodiment, ...

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PUM

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Abstract

A light source device includes a light source having a plurality of light emitting sections, a plurality of wavelength conversion elements each having a periodic polarization inversion structure, and for converting wavelengths of light beams emitted from the plurality of light emitting sections into predetermined wavelengths, a temperature control medium for controlling temperature of the plurality of wavelength conversion elements, a holding member having a housing space for housing the temperature control medium, and for holding the plurality of wavelength conversion elements, and a temperature control section for controlling the temperature of the plurality of wavelength conversion elements with the temperature control medium, and the temperature control section controls the temperature of the wavelength conversion elements so that the wavelength of the light beam emitted from at least one of the plurality of wavelength conversion elements is different from the wavelength of the light beam emitted from another of the plurality of wavelength conversion elements.

Description

technical field [0001] The present invention relates to a light source device and a projector. Background technique [0002] In recent years, as the demand for miniaturization of projectors has increased, projectors using laser light sources have been developed along with higher output power of semiconductor lasers and the appearance of blue semiconductor lasers. Since such a projector can sufficiently expand the color reproduction range due to the narrow wavelength range of the light source, and can also be miniaturized or reduce components, it has great potential as a next-generation display device. In this case, the light sources must be three-color laser light sources of red (R), green (G), and blue (B). For example, although there is a fundamental vibration in the semiconductor laser for the light source for R light or the light source for B light, there is no fundamental vibration for the light source for G light. The second harmonic (Second Harmonic Generation, here...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20H01S3/23H01S5/40
CPCG03B21/16G03B21/2033G03B21/204G03B21/208
Inventor 木下悟志
Owner SEIKO EPSON CORP
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