Patent ID: 9723280
Date: 2017-08-01
CPC Classifications: G02B,G03B,H04N

Claim:
1. A projection-type image display device, comprising: a projection unit including a light source configured to emit light that has intensity corresponding to a pixel value of an input image and a deflection unit configured to deflect the emitted light from the light source based on a mirror that scans a projection object; a retiming unit configured to execute a retiming operation on pixel data of the input image based on a deflection angle in the deflection unit; a shape distortion correction table which comprises of a shape distortion correction amount in each shape distortion correction table calculation position, wherein the shape distortion correction table is required for correction of shape distortion included in a projection image on the projection object from the projection unit; a brightness distortion correction table which comprises of a brightness distortion correction amount in each brightness distortion correction table calculation position, wherein the brightness distortion correction table is required for correction of brightness distortion included in the projection image; an image correction unit configured to correct distortion of the input image based on a signal processing operation on the shape distortion correction table and the brightness distortion correction table; and a correction table calculation unit configured to calculate at least one of the shape distortion correction amount in each shape distortion correction table calculation position or the brightness distortion correction amount in each brightness distortion correction table calculation position based on an input image parameter including at least one of a size of the input image, a mirror-parameter including a deflection angle of the mirror of a polarization unit, an effective beam region information, a mirror angle information at a time of the retiming operation, a mirror-model including a position of the mirror and an optical arrangement information of the mirror and the light source, or a projection object parameter including a position information of the projection object relative to the projection unit.