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System for correcting optical center linked with lens shift

A technology for correcting optics and optical centers, applied in the field of geometric correction systems, can solve problems such as optical center correction without describing the optical center

Inactive Publication Date: 2005-03-30
NEC VIEWTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document does not describe a technique for calculating the displacement of the optical center based on the movement amount of the lens and performing optical center correction

Method used

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  • System for correcting optical center linked with lens shift
  • System for correcting optical center linked with lens shift
  • System for correcting optical center linked with lens shift

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Embodiment Construction

[0015] The instructions presented below are for reference Figure 1-Figure 3 of the first embodiment of the present invention.

[0016] figure 1 is a block diagram of the optical center correction system according to the first embodiment of the present invention. Optical center correction systems include curved screens 1 (or screens that require some degree of geometric correction as opposed to flat surfaces such as spherical surfaces, such as Figure 7 , Figure 8 A wall or a curtain connecting side portions are displayed; a projector 2 having a lens shift function for projecting images; and a computer 5 (hereinafter referred to as PC) for arithmetic operations. The projector 2 and the computer 5 are connected through a communication cable 6 with two-way communication function, allowing mutual exchange of information.

[0017] figure 2 is the block diagram of the projector. The projector 2 includes a lens 7 , a shift detection unit 8 , a memory 9 , a correction unit 10...

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Abstract

A system for correcting an optical center is provided with: a lens control unit for shifting a lens in vertical and horizontal directions; an offset detection unit for detecting a displacement of the optical center with respect to a screen on a basis of a magnitude of a shift of the lens effected by the lens control unit; a memory unit for storing in advance data on the centrally aligned location of the lens and also data on the positions of the optical center effected by lens shifts; and a correction unit for linking the displacement of the optical center detected by the offset detection unit with the data on the centrally aligned location of the lens and the data on the position of the optical center effected by the lens shift stored in the memory unit to correct the displacement of the optical center.

Description

technical field [0001] The present invention relates to a geometric correction system, in particular to an optical center correction system which automatically corrects the position of the optical center through the connection with the lens movement. Background technique [0002] When the optical center deviates from the lens center due to lens movement, in order to properly make distortion corrections, conventional correction geometry methods need to first correct the displacement of the optical center and then correct the distortion in the geometry. In other words, the traditional method of correcting geometry lacks the functional relationship between lens movement and optical center displacement, so it is difficult to predict what degree of lens movement will cause the degree of optical center displacement. For this reason, when the optical center of the projected image deviates due to lens movement, it is necessary for the user to manually correct the optical center by h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/00G02B7/00G02B27/00G03B5/06H04N5/74
CPCG02B27/0025G02B7/005H04N5/74
Inventor 森胁大辅小松义治
Owner NEC VIEWTECH