Patent ID: 9298013
Filing Date: 2016-03-29
CPC Classification: G02B,G09G,H04N

Claim Text:
1. An image display device for displaying an image on a projection surface through scanning of a laser beam that accompanies fluctuations in the scanning speed, comprising: a laser control unit for selecting a first waveform pattern that includes a first on period and a first off period within a period for displaying a first pixel, and for selecting a second waveform pattern that includes a second on period and a second off period within a period for displaying a second pixel that is longer than said period for displaying a first pixel, where said second on period in said second waveform pattern is segmented more than said first on period in said first waveform pattern, and the time ratio of said second on period accounting for said second waveform pattern is smaller than the time ratio of said first on period accounting for said first waveform pattern; a laser source for emitting a laser beam at a current level corresponding to the display gradation of said first pixel during said first on period in said first waveform pattern selected by said laser control unit, and for emitting a laser beam at a current level corresponding to the display gradation of said second pixel during said second on period in said second waveform pattern selected by said laser control unit, and at the same time, allowing a current level to be set to the level at its own bias current or lower irrelevant of said display gradations in said first off period and said second off period; and a scanning mirror from which a laser beam that pertains to said first pixel and said second pixel and that has been emitted from said laser source is reflected in accordance with its shifting angle so as to be projected onto said projection surface following a predetermined scanning order.