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Optical module and scanning image display device

A technology of optical components and heating devices, which is applied in projection devices, optical components, image communication, etc., and can solve problems such as relative position offset and image blur

Inactive Publication Date: 2013-09-18
HITACHI MEDIA ELECTORONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the optical axis is shifted, there will be a problem that the relative positions of the spots of various colors on the display area such as the screen will shift, resulting in blurred images

Method used

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  • Optical module and scanning image display device
  • Optical module and scanning image display device
  • Optical module and scanning image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] figure 1 It is a configuration diagram of a scanning image display device according to an embodiment of the present invention.

[0072] exist figure 1 Among them, the optical component 101 has: the first laser 1a, the second laser 1b, and the third laser 1c, which correspond to the three colors of red (R) / green (G) / blue (B) respectively and serve as laser light sources; The module 100 has a beam coupling unit that couples the beams emitted from each laser light source; a projection unit that projects the coupled beams toward the screen 109; and a scanning unit that performs two-dimensional scanning of the projected beams on the screen 109 . The projection unit has a polarizing beam splitter (PBS) 110 , a 1 / 4 wavelength plate 111 , an angle of view expanding element 112 , and the like. In addition, the scanning unit includes a scanning mirror 113 and the like.

[0073] An image signal to be displayed is input to a video signal processing circuit 103 via a control cir...

Embodiment 2

[0096] Image 6 It is a perspective view showing the second embodiment of the optical module of the present invention. exist Image 6 Among them, a heat spreader 11 is arranged on the lower surface or upper surface of the optical component 101 through the heat conduction grease 4 or heat conduction sheet or heat conduction gel. When viewed from the housing 12, the heat spreader 11 is arranged along the The direction of the laser 1b and the third laser 1c extends away from the horizontal plane of the housing 12, thereby enabling the heat sink 11 to be connected to the cooling element 5 disposed next to the second laser 1b and the third laser 1c of the optical module 101. Cool the light assembly 101 . According to this arrangement, the cooling element 5 , the heat sink 6 for the cooling element, and the fan 7 can be arranged in the height direction of the optical module 101 , and the thickness of the device can be reduced.

[0097] The first heating element 3a, the second hea...

Embodiment 3

[0101] Figure 7 It is a perspective view showing a third embodiment of the optical module of the present invention.

[0102] exist Figure 7 Among them, in view of the optical characteristics, as an optical component arrangement, when the first laser 1a is arranged as a green laser, the second laser 1b is arranged as a red laser, and the third laser 1c is arranged as a blue laser, the same as Image 6 In the same manner as in the second embodiment, the radiator 11 is arranged on the lower surface or the upper surface of the casing 13, and when viewed from the casing 12, the radiator 11 is kept away from the casing 12 along the direction of the second laser 1b and the third laser 1c. Extending on the horizontal plane of the optical module 101, the temperature distribution of the optical module 101 can be made uniform by connecting the heat sink 11 to the cooling element 5 disposed on the side sandwiched between the first laser 1a and the second laser 1b of the optical module ...

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Abstract

In an optical module that aligns light beams from lasers of the three colors of red, green, and blue along a single combined beam optical axis, when the ambient temperature range is wider than the guaranteed operating range of the lasers, relative positional displacements of beam spots of the three colors that are generated due to a displacement or a deformation resulting from a temperature range at a heating time or a cooling time are suppressed. The optical module, which has mounted thereon a plurality of lasers, and emits light beams from the plurality of lasers, includes a cooling device that cools the entire optical module via a case on which the optical module is mounted, and heating devices that are provided on respective laser holders and individually heat the respective lasers.

Description

technical field [0001] The present invention relates to an optical module and a scanning image display device, for example, an optical module that collimates beams from a plurality of lasers on one optical axis and emits them, and a scanning image display device that displays images of the beams from the optical module . Background technique [0002] In recent years, the development of compact projectors that are portable and capable of displaying on a large screen has been actively developed. Small projectors that can be connected to notebook computers, etc., and video cameras with built-in projectors capable of projecting and recording images are already on the market, and it is expected that small projectors built in mobile phones and smartphones will also appear in the future. [0003] Regarding the method of projectors, in the past, a light bulb or LED was used as a light source, and the image displayed on a liquid crystal panel or a digital micromirror device (DMD: Di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B26/10G03B21/16H04N9/31
CPCG03B21/2033G03B33/12H04N9/3129H04N9/3144H01S5/02453H01S5/4093G02B7/008G02B27/104G03B21/16F21V29/00
Inventor 加藤盛一风间敦天野泰雄保坂宪生黑岩勉田中哲平
Owner HITACHI MEDIA ELECTORONICS CO LTD
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