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Multiprojection display system and screen forming method

A display system and multi-projection technology, applied to TV system components, static indicators, cathode ray tube indicators, etc., can solve problems such as inability to adjust in real time

Active Publication Date: 2014-05-21
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it impossible to adjust the position of the image projected from each projector in real time

Method used

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  • Multiprojection display system and screen forming method
  • Multiprojection display system and screen forming method
  • Multiprojection display system and screen forming method

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Experimental program
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Embodiment Construction

[0033] Next, the present invention will be described with reference to the accompanying drawings.

[0034] Hereinafter, a multi-projection display system according to the present invention is described using a configuration example of a rear-projection-type projector including a plurality of laser projectors for Three-color (ie, R (red), G (green), and B (blue) ) laser beams projected onto the screen are scanned in an orderly manner to form a square image. The invention can be applied to configurations using a two-dimensional scanning projector (ie a simple scanning projector) for forming an image on a screen by using eg LEDs (Light Emitting Diodes) or other light sources. Therefore, the type of light source is not limited to laser beams. Not limited to rear projection type projectors, the present invention can be applied to front projection type projectors that project images from the front onto a screen. For example, Japanese Patent Laid-Open Publication No. 2005-18040 des...

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Abstract

Provided is a multiprojection display system that includes a plurality of cameras configured to capture images of predetermined vertex regions including vertexes of projected images projected from two-dimensional scanning projectors onto a screen, an image-capturing timing control unit configured to control the cameras to capture images of the screen for a predetermine period including a display. start row of one frame of the projected image or a predetermined period including a display end row, and a vertex position detection unit configured to detect vertexes of the respective projected images from data relating to the plurality of images captured by the cameras, and to output data relating to image edges indicating positions of the vertexes. A projector control unit adjusts, when the vertex of the projected image shifts from a present reference position, a scanning range of the two-dimensional scanning projector so that the vertex can be matched with the reference position.

Description

technical field [0001] The present invention relates to a multi-projection display system that projects images from a plurality of projectors onto a screen to form one screen, and a screen forming method. Background technique [0002] As a large-scale projection display, there is known a multi-projection display system that projects images from a plurality of projectors onto a screen and connects the projected images to form one screen. [0003] In such a multi-projection display system, the positional accuracy of images projected from multiple projectors to a screen greatly affects the quality of the entire projected image. [0004] For example, when projected images are shifted in position, discontinuous joins may be formed between images projected on a screen, or edges of adjacent images may overlap each other, causing a great deterioration in display quality. [0005] In order to solve this problem, for example, Patent Document 1 discusses a method of detecting the posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/74G09G3/20G09G5/00
CPCH04N9/3194H04N9/3129H04N9/3147H04N9/317
Inventor 对田俊二
Owner NEC CORP