Display device, display method, and projection type display device

Abstract

Aspects of the invention can provide a display device, a display method, and a projection type display device that allow a characteristic of a display image such as brightness to be continuously changed. The display device can include a light source capable of emitting a plurality of different color lights and a white light, and an optical modulation device for modulating light corresponding to the lights emitted from the light source. The ratio of the period of emitting the white light relative to the total of the periods of emitting the lights from the light source can be variable.

1 . A display device, comprising: 
 a light source capable of time-sequentially emitting a plurality of different color lights and a white light;    an optical modulation device that modulates light corresponding to the lights emitted from the light source; and    a ratio of a period of emitting the white light relative to a total of the periods of emitting the lights from the light source being variable.    
   
   
       2 . The display device according to  claim 1 , 
 the ratio of the periods of emitting the plurality of different color lights and the white light being capable of being adjusted to a prescribed value.    
   
   
       3 . The display device according to  claim 2 , 
 the ratio of the period of emitting the white light being adjusted based on a video signal input to the display device.    
   
   
       4 . The display device according to  claim 2 , further comprising: 
 brightness detection device that detects an ambient brightness; and    the ratio of the period of emitting the white light being adjusted based on the output of the brightness detection device.    
   
   
       5 . The display device according to  claim 2 , further comprising: 
 an input portion that inputs the ratio of the period of emitting said white light; and    the ratio of the period of emitting the white light being adjusted based on information input to the input portion.    
   
   
       6 . The display device according to  claim 1 , 
 the light source having light emitting portions that emit the plurality of different color lights respectively.    
   
   
       7 . The display device according to  claim 6 , 
 the light emitting portion being a solid light source.    
   
   
       8 . The display device according to  claim 6 , 
 during the period of emitting said white light, the white light being emitted by simultaneously emitting different color lights from the light emitting portions that emit the different color lights.    
   
   
       9 . The display device according to  claim 6 , 
 the light source having a white light emitting portion that can emit the white light; and    during the period of emitting the white light, a white light being emitted from the white light emitting portion.    
   
   
       10 . The display device according to  claim 1 , 
 the different color lights being sequentially emitted on a basis of a sub unit period produced by dividing one unit period for producing an image; and    the white light being emitted in a part of the sub unit period.    
   
   
       11 . The display device according to  claim 1 , 
 the different color lights being sequentially emitted on a basis of a sub unit period produced by dividing one unit period for producing an image; and    when the white light is emitted, a sub unit period for emitting the white light is added to the unit period.    
   
   
       12 . The display device according to  claim 11 , 
 the duration of the unit period being the same as the duration without the additional sub unit period for emitting said white light.    
   
   
       13 . The display device according to  claim 11 , 
 the duration of the sub unit periods being the same regardless of the presence/absence of the sub unit period for emitting the white light.    
   
   
       14 . The display device according to  claim 1 , 
 the optical modulation device being a liquid crystal panel.    
   
   
       15 . A displaying method using a display device, the display device comprising: 
 a light source capable of time-sequentially emitting a plurality of different color lights and a white light;    an optical modulation device that modulates light corresponding to the lights emitted from the light source; and    a ratio of a period of emitting the white light relative to a total of the periods of emitting the lights from the light source being variable.    
   
   
       16 . A projection type display device, comprising: 
 a display device according to  claim 1.