Patent ID: 9451224
Filing Date: 2016-09-20
CPC Classification: G09G,H04N

Claim Text:
1. A laser projector comprising: a drive signal generation unit for processing an input image signal to generate a laser drive signal and a scanner drive signal; a pixel position detection unit for detecting positions of pixels corresponding to a one-frame image from the generated scanner drive signal; a compensation value decision unit for deciding a brightness compensation value corresponding to the detected pixels; a compensation unit for compensating a laser drive signal corresponding to the detected pixels according to the decided brightness compensation value such that the brightness compensation value gradually increased or decreased from at least one reference pixel, among total pixels corresponding to each horizontal line of the one-frame image, to pixels remote from the at least one reference pixel; a laser light source for generating laser light according to the compensated laser drive signal; and a scanner for scanning the laser light according to the scanner drive signal, wherein the reference pixel is located at the darkest portion among total pixels corresponding to a horizontal line of the one-frame image, wherein when a scanning of the scanner moves along the horizontal line of the one-frame image, a scanning speed of the scanner is gradually decreased in a direction of the reference pixel from a first pixel among total pixels corresponding to the horizontal line, and is gradually increased in a direction of a last pixel among total pixels corresponding to the horizontal line from the reference pixel, and wherein when the darkest portion is shifted from a first region of the one-frame image to a second region of the one-frame image, the reference pixel is reestablished from a first pixel located in the first region of the one-frame image to a second pixel in the second region of the one-frame image.