×

Lighting apparatus and projection type display, and driving method therefor

  • US 20090002313A1
  • Filed: 07/21/2008
  • Published: 01/01/2009
  • Est. Priority Date: 10/09/2001
  • Status: Active Grant
First Claim
Patent Images

1. A lighting apparatus used for lighting an optical modulation device in a projection type display, comprising:

  • a light source,a uniform lighting device which equalizes the illuminance distribution of light shone from the light source, anda shading plate for adjusting the amount of light emitted to the optical modulation device, the shading plate constructed such that at least a portion of light emitted from the light source is cut off,the shaded area of the outgoing beam being adjusted by a movement of the shading plate,the amount of light emitted to the optical modulation device being adjusted by controlling the shading plate based on the information from outside, andthe shading plate being constructed to be movable in a direction parallel with the principal plane thereof, and the amount of light being adjusted by the shift amount of the shading plate.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×