Lighting apparatus, display apparatus, projection display apparatus, lighting method, image display method and image projection method

A technology for lighting devices and display devices, which is applied in the field of image projection and can solve problems such as low light utilization efficiency

Inactive Publication Date: 2008-08-20
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the light passing through the lowermost part of the light valve 108 does not immediately move to the uppermost part of the light valve 108, there is still a problem of low light utilization efficiency.

Method used

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  • Lighting apparatus, display apparatus, projection display apparatus, lighting method, image display method and image projection method
  • Lighting apparatus, display apparatus, projection display apparatus, lighting method, image display method and image projection method
  • Lighting apparatus, display apparatus, projection display apparatus, lighting method, image display method and image projection method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0030] 1 is a cross-sectional view showing a schematic configuration of a projection display device according to a first embodiment of the present invention. In FIG. 1 , 1R represents a red laser light source emitting red laser light, 1G represents a green laser light source emitting green laser light, and 1B represents a blue laser light source emitting blue laser light.

[0031] 2a and 2b represent dichroic mirrors, and dichroic mirror 2a transmits red light and reflects green light. The dichroic mirror 2b reflects blue light and transmits red light and green light.

[0032] 3 denotes a color wheel, which is composed of a first disk body 3a and a second disk body 3b, and is arranged in the optical path of light emitted from the light sources 1R, 1G, and 1B.

[0033] 4a, 4b, and 4c represent light guides, which receive light of any color passing through the color wheel 3 at one end and emit it from the other end.

[0034] 5a, 5b, 5c denote rod integrators (rod integrators),...

no. 2 example

[0068] 8 is a cross-sectional view showing a schematic configuration of an optical path switching member in a projection display device according to a second embodiment of the present invention. In FIG. 8 , 17 a , 17 b , and 17 c denote red light, green light, and blue light emitted from three laser light sources not shown, respectively. 18a, 18b, and 18c represent optical deflectors, and acousto-optical elements or electro-optic elements, or galvano mirrors or micro mirror devices can be preferably used. The three light deflectors 18a to 18c change the advancing direction of the incident light according to the action of diffraction, refraction and reflection in response to external input. 19a and 19b represent dichroic mirrors, 20 represents lenses, 21a to 21f represent 6 light guides, 22a to 22f represent 6 rod integrators, 3 in the vertical direction and 3 in the left and right directions, a total of 6, Installed at specified intervals facing the sides in the longitudinal ...

no. 3 example

[0074] 9 is a cross-sectional view showing a schematic configuration of an optical path switching member in a projection display device according to a third embodiment of the present invention. In this third embodiment, the light is emitted from the transmission surface of the second disk body during the multiple reflections between the rotating first disk body and the second disk body, and by letting it enter Light guide for light path switching. In addition, in the third embodiment, by allowing the light emitted from the red, green and blue light sources to enter different positions on the first disc body, it is unnecessary to use the splitter used in the first embodiment of the present invention. color mirror.

[0075] In FIG. 9 , 24 denotes a color wheel, which is composed of a first disk body 24 a and a second disk body 24 b. The first disk body 24a and the second disk body 24b are fixed to the rotation shaft of the motor 24c while being aligned with their centers and m...

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PUM

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Abstract

Red light emitted from a red laser light source, green light emitted from a green laser light source and blue light emitted from a blue laser light source are incident on a first disc body of a color wheel, are transmitted or reflected in conformity with the colors of the lights in wavelength selecting regions of a second disc body every time the color wheel performs a predetermined rotation. AS being reflected by the first disc body, the lights are divided into different positions to be emitted from the color wheel and irradiated to irradiation regions successively switched by an upward or downward reciprocal movement of a mirror group.

Description

technical field [0001] The present invention relates to an illuminating device and method for illuminating a color image display element, a display device and a projection display device having the above illuminating device, and an image display method and an image projection method using the above illuminating method. Background technique [0002] As large-scale display devices, there are well known liquid crystal display devices using a large liquid crystal panel, projection type and rear projection ( rear-projection) type display device. Among the projection type and rear projection type display devices, there are types that have three spatial light modulation elements corresponding to the three primary colors of red, green, and blue in order to form a color image; The type of color image. [0003] As a method of time-divisionally irradiating light of three primary colors, a method is disclosed in which light from a white light source is separated into light of three pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14G03B21/00G02F1/13G02F1/13357G02F1/1335
CPCH04N9/3161H04N9/3197H04N9/3117G03B21/20G03B21/206H04N9/3164G03B21/2066G03B33/08
Inventor 伊藤达男山本和久笠澄研一小岛哲郎
Owner PANASONIC CORP
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