The picture projection screen which decreases speckle noise

摘要

Picture projection module inside the housing illuminates the pixel where the inside of luster pattern is selected, operates in order to draw up the picture on the indicatory screen of VGA quality. The device which is offered with this invention, in order a) indicatory screen and array and b which of renzuretsuto possess the front and the rear) to direct the laser beam on the said rear of the said screen, sweeps the said beam, as pattern of the scanning line from the edge of the said rear of the said screen to the edge being the picture projection assembly in order each scanning line has the extension and many pixels according to scan direction, illuminating the pixel which is selected, visualizes, to draw up the picture, as for the said laser beam, picture projection assembly and c) each renzuretsuto which possess the beam size which parallels to the said scan directionIn order to possess the renzuretsuto size above the said beam size which was measured, according to the said scan direction, it includes with the expedient which decreases speckle noise by constituting.