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Projector

A projector and projection technology, applied in the field of projectors, can solve problems such as inability to reproduce colors, priority of brightness or contrast, white background, etc., and achieve the effect of optimal image projection and simple structure

Inactive Publication Date: 2008-12-03
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such photographic images, if the contrast is raised too much, the background may be washed out and accurate color reproduction may not be possible.
[0010] In addition, Patent Documents 1 to 3 are technologies that give priority to the color reproducibility of an image, and are not technologies that give priority to brightness or contrast.

Method used

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Examples

Experimental program
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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0029] figure 1 It is a block diagram showing the configuration including the projection mechanism of the projector according to the embodiment of the present invention. exist figure 1 Among them, the light source lamp 1 is a white light source for projecting an image 30 onto a projection surface 20 . The light source lamp 1 is driven by a light source driving circuit 1a. In addition, near the light source lamp 1 , an elliptical focusing mirror 2 for elliptical focusing of light from the light source lamp 1 is provided. Furthermore, in the light-condensing direction of the elliptical light-condensing mirror 2 , rotary color wheels 3 and 4 and a light guide 5 are arranged.

[0030] That is, the light from the light source lamp 1 is first condensed by the elliptical condensing mirror 2 , and then condensed on the light guide 5 through the color wheels 3 and 4 . like ...

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PUM

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Abstract

The objective of the invention is to provide a projector using a simple configuration, capable of optimally projecting an image according to the state. The projector includes a first projection mode where color reproducibility of an image is prioritized and a second projection mode where the lightness of the image is prioritized, and either of the two projection modes is properly selected, depending on whether the distance from the projector to a projected screen is far (step S24), whether an image is a photographic image (step S26), and whether the exposure of a principal object is underexposure (step S27) or the like.

Description

technical field [0001] The present invention relates to improvements in projectors for projecting digital images onto a projection surface. Background technique [0002] Patent Document 1 JP-A-2002-40558 [0003] Patent Document 2 JP-A-2002-268010 [0004] Patent Document 3 JP-A-2002-182128 [0005] Presentation projectors capable of projecting meeting materials and the like on a screen have been widely used in meetings where many members gather. In addition, in recent years, with the popularization of digital cameras or mobile phones with camera functions, the digital images taken by digital cameras or mobile phones are enlarged and displayed by projectors, so that many people can enjoy them together. Increase. In such a case, the projector is not required to be enlarged excessively, but to improve the image quality including color reproducibility, or to observe with a larger screen than that of a small monitor attached to a camera etc. without loss. presence. [0006...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/00H04N5/74H04N9/31G03B21/14
CPCH04N9/3197H04N9/3114
Inventor 野中修
Owner OLYMPUS CORP