Laser image display, and optical integrator and laser light source package used in such laser image display

一种图像显示器、光学积分器的技术，应用在光学、光学元件、图像通信等方向，能够解决寿命短、色彩再现区受限、光使用效率低等问题，达到减小斑点噪声的效果

Active Publication Date: 2008-07-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this lamp light source has problems of short lifetime, limited color reproduction area, and low light use efficiency
Technical proposals for achieving at a high level the following two points: sufficient speckle noise reduction effect and ensuring high light usage efficiency have not been found

Method used

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  • Laser image display, and optical integrator and laser light source package used in such laser image display
  • Laser image display, and optical integrator and laser light source package used in such laser image display
  • Laser image display, and optical integrator and laser light source package used in such laser image display

Examples

Experimental program
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no. 1 example

[0132] The first embodiment of the present invention is a laser image display. The laser image display is a projection display (laser display). FIG. 1 is a schematic structural diagram of a laser image display 100 according to a first embodiment of the present invention.

[0133] The laser image display 100 includes: laser light sources of three colors, red light (R) laser light source 1R, green light (G) laser light source 1G and blue light (B) laser light source 1B; laser light source control part 1C, executes laser light source 1R, Drive control of 1G and 1B; Dichroic mirror 21, reflecting or transmitting the laser light; Lens 22 (for example, a diverging lens); Beam deflection element part 3 deflects the advancing direction of laser light; Beam deflection element control part 3C, drives and control beam deflection element part 3; optical integrator 4, guiding the laser light; pseudo-surface light source element 5, preferably arranged inside the optical integrator 4 or arr...

example 1

[0228] FIG. 11 is a view showing a structural example of a laser light source. In FIG. 11 , the red laser light source 1R of the image display device 100 is a semiconductor laser, and the modulation element 7 has an effective surface (an area actually used for image display) in a rectangular shape. In the present invention, preferably, the longitudinal direction 1109 of the effective surface of the modulation element having a rectangular effective surface and the thickness direction 1105 of the active layer of the semiconductor laser are parallel to each other.

[0229] The active surface of the modulation element 7 has a rectangular shape corresponding to the shape of the image to be displayed, and specifically has an aspect ratio of horizontal:vertical=4:3 or 16:9. In the laser image display 100 , laser light emitted from an effective surface is expanded by a projection optical system and projected onto a screen 10 . A semiconductor laser element generally has a layered str...

example 2

[0237] The laser light sources of the laser image display 100 may be individually provided as shown in FIG. 1 , but one laser light source package may also be used. The laser light source package includes a laser light source for emitting multiple wavelengths substantially in one housing. 12 and 13 show structural examples of laser light source packages. In FIGS. 12 and 13 , illustration of the package case is omitted for clarity of the drawings.

[0238] Package example 1 shown in FIG. 12 is a laser light source package including a red semiconductor laser light source 1R, a green SHG laser light source 1Ga, and a blue semiconductor laser light source 1B. In the laser image display 100 , this package arranges each laser light source 1R or 1B so that the thickness direction 1105 of the active layer is parallel to the long-side direction 1109 ( FIG. 11 ) of the modulation element 7 . Semiconductor laser light source bases (not shown) are disposed on both sides of the semicondu...

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Abstract

A laser image display, comprising: a laser light source emitting laser light; a beam deflection element for receiving the laser light and deflecting its advancing direction; a beam deflection element control part for controlling the degree of deflection passing through the beam deflection element part; optical integration The device is used to receive and guide the deflected laser light to output the deflected laser light from the output end face; the pseudo surface light source element is used to scatter the deflected laser light; Laser light scattered by surface light source elements.

Description

technical field [0001] The present invention relates to a laser light source package used in an image display device, an optical integrator for guiding light from a light source, and an image display device such as a television and an image projector. In particular, the present invention relates to a laser light source package capable of emitting laser light of multiple wavelengths, an optical integrator suitable for the laser light, and a laser image display using them. Background technique [0002] Currently, image display devices of various methods are prevalent. One image display method used in such an image display device is a projection display method in which modulated light from a light source is projected onto a screen to display an image. Generally, the light source employed in an image display device using this method is a lamp light source. However, this lamp light source has problems of short lifetime, limited color reproduction area, and low light usage effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/48G02B26/08G03B21/00
CPCG02B26/105G02B27/0961G03B21/005H04N9/3129H04N9/3161
Inventor 水岛哲郎笠澄研一伊藤达男杉田知也山本和久门胁慎一
Owner PANASONIC CORP
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