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Projector device and projection method thereof

A projection device and projection technology, which are applied to projection devices, components of color TVs, components of TV systems, etc., can solve problems such as difficulty in adjusting fine positions, trapezoidal deformation of projected images, and inability to adjust.

Inactive Publication Date: 2011-09-28
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the projection optical axis relative to the projection surface changes, resulting in a significant trapezoidal distortion in the projected image
Therefore, when adjusting the position of the projected image after the keystone correction, it is necessary to repeat the above-mentioned keystone correction process again, and there is a problem that the processing is complicated.
In addition, this mechanical adjustment method also has the problem that it is difficult to adjust the fine position, and it cannot be adjusted as the user wishes.

Method used

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  • Projector device and projection method thereof
  • Projector device and projection method thereof
  • Projector device and projection method thereof

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Embodiment Construction

[0030] A projection device and a projection method of the projection device according to one embodiment of the present invention will be described below with reference to the drawings. figure 1 is a block diagram showing the configuration of the projection device 1 . As shown in the figure, the projection device 1 includes a signal input unit 11, an image processing unit 12, a projection control unit 13, a projection optical system 14, an imaging unit 15, an operation unit 16, and a central control unit 17 for collectively controlling these components.

[0031] The signal input unit 11 inputs an image signal from an external device 10 such as a personal computer or a video recorder. That is, the signal input unit 11 is realized by an interface for receiving RGB signals output from a personal computer or composite signals output from a video recording device. In addition, in this embodiment, the image signal is input from the external device 10 via the signal input unit 11, bu...

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Abstract

A projector device includes: a light modulating element (34) which modulates light from a light source section according to an image signal; a projecting section which projects a modulation light modulated by a displayable region (54) in a surface of an effective region (50) of the light modulating element onto a projection surface (30); a trapezoidal distortion correcting section which corrects trapezoidal distortion of a projection image projected onto the projection surface by projecting a light modulation image (100) by means of the displayable region by an after-correction image region (51) which is a part of the effective region of the light modulating element; and a position adjusting section which adjusts the position of the projection image (200) projected onto the projection surface by moving the after-correction image region in the surface of the effective region while maintaining the size and shape of the after-correction image region.

Description

technical field [0001] The present invention relates to a projection device having a trapezoidal deformation correction function for correcting trapezoidal deformation of a projection image projected onto a projection surface, and a projection method for the projection device. Background technique [0002] Conventionally, as such a projection device, there is known a projection device that corrects trapezoidal distortion of a projected image projected onto a projection surface by correcting an image in a displayable region of a light modulation element that modulates light from a light source (see Patent No. Literature 1). [0003] In this projection device, the entire projection area projected from the entire surface of the light modulation element is expanded to cover the projection surface (screen), and the corrected image area of ​​the light modulation element corresponding to the contour of the projection surface can affect the light modulation element. The image of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/74G03B21/00
CPCH04N9/3197G03B21/14H04N9/3194H04N9/3185
Inventor 内山喜照
Owner SEIKO EPSON CORP