Multi-projection display

Abstract

A multi projection display includes a plurality of projector units to modulate light from an LED light source according to image information to project, a unit image information generating unit to generate unit image information to be inputted to each of the plurality of projector units, and a unit image information correcting unit to correct the unit image information based on a result of capturing projection images projected onto a transmissive screen. For this reason, a shutter, which results in complicating the construction, is not needed and further it is possible to further reduce the adjustment time.

1 . A multi-projection display, comprising: 
 a plurality of projector units to modulate light from a solid-state light source based on image information;    a unit image information generating unit to generate unit image information to be input to each of the plurality of projector units; and    a unit image information correcting unit to correct the unit image information based on a result concerning capturing projection images projected onto a screen.    
   
   
       2 . The multi-projection display according to  claim 1 , 
 the solid-state light source being an LED light source, a semiconductor laser light source, a solid-state laser light source, or an EL light source.    
   
   
       3 . The multi-projection display according to  claim 1 , 
 the unit image information correcting unit correcting the unit image information based on the result of capturing adjusting unit images projected by the projector units.    
   
   
       4 . The multi-projection display according to  claim 1 , 
 the unit image information correcting unit correcting shapes, positions and/or inclinations of the unit images to be projected by the projector units.    
   
   
       5 . The multi-projection display according to  claim 1 , 
 the unit image information correcting unit correcting brightness and/or colors of the unit images to be projected by the projector units.    
   
   
       6 . The multi-projection display according to  claim 1 , 
 the unit image information correcting unit having a function of correcting brightness and/or color for every pixel in the plurality of projector units.    
   
   
       7 . The multi-projection display according to  claim 1 , further comprising: 
 an image-capturing device to capture the projection images projected onto the screen.    
   
   
       8 . The multi-projection display according to  claim 1 , 
 the unit image information correcting unit correcting the unit image information using correction parameters that are determined based on the capturing result.    
   
   
       9 . The multi-projection display according to  claim 8 , further comprising: 
 a correction parameter storing unit to store the correction parameters.    
   
   
       10 . The multi-projection display according to  claim 8 , further comprising: 
 a correction parameter automatic acquiring device to capture an adjusting image in certain circumstances to automatically acquire the correction parameters.    
   
   
       11 . The multi-projection display according to  claim 1 , further comprising: 
 an optical correcting device to correct the position and/or orientation of an optical element provided in the multi-projection display.    
   
   
       12 . The multi-projection display according to  claim 11 , further comprising: 
 an optical element automatic correcting device to capture an adjusting image in certain circumstances to automatically correct a position and/or orientation of the optical element.    
   
   
       13 . The multi-projection display according to  claim 1 , further comprising: 
 a solid-state light source control unit to control an amount of light emitted from the solid-state light source separately for every projector unit.    
   
   
       14 . The multi-projection display according to  claim 1 , 
 the multi-projection display being a rear surface projection type multi-projection display which further comprises a transmissive screen to project the projection images from the plurality of projector units.    
   
   
       15 . The multi-projection display according to  claim 1 , 
 the multi-projection display being a front surface projection type multi-projection display which projects the projection images from the projector units onto a front surface thereof.    
   
   
       16 . A multi-projection display, comprising: 
 a plurality of projector units, each having a solid-state light source to generate a plurality of color light components;    a plurality of electro-optical modulating devices to modulate the plurality of color light components respectively; and    a projection optical system to project color light components modulated by the plurality of electro-optical modulating devices;    a unit image information generating unit to generate unit image information to be input to the plurality of projector units respectively; and    a solid-state light source control unit to control an amount of light emitted from the solid-state light source for every projector unit.    
   
   
       17 . The multi-projection display according to  claim 16 , 
 the solid-state light source control unit having a function of controlling the amount of light emitted from the solid-state light source for every electro-optical modulating device.    
   
   
       18 . The multi-projection display according to  claim 16 , 
 the solid-state light source control unit having a function of dynamically controlling the amount of light emitted from the solid-state light source.    
   
   
       19 . The multi-projection display according to  claim 16 , 
 the solid-state light source control unit having a function of controlling a voltage to be supplied to the solid-state light source for every projector unit or for every electro-optical modulating device.    
   
   
       20 . The multi-projection display according to  claim 16 , 
 the solid-state light source control unit having a function of controlling an emitting period of the solid-state light source for every projector unit or for every electro-optical modulating device.    
   
   
       21 . The multi-projection display according to  claim 20 , 
 the electro-optical modulating device being a liquid crystal device which writes one unit screen information twice or more, and    the solid-state light source control unit having a function of allowing the solid-state light source to emit during one frame outside at least the first writing period of the liquid crystal device.    
   
   
       22 . The multi-projection display according to  claim 20 , 
 the electro-optical modulating device being a liquid crystal device which writes an image sequentially for every screen region, and    the solid-state light source control unit having a function of allowing the solid-state light source to emit during one frame outside the image writing period of the liquid crystal device.