Patent ID: 8529068
Filing Date: 2013-09-10
Classification: G02B,G03B,G09G,H04N

Abstract:
1. A beam light source of an image display device which displays an image on a screen by scanning an optical beam in a two-dimensional direction, the beam light source comprising: a light source that emits a diffuse light modulated according to an image signal; and an optical element that shapes the light emitted from the light source to the optical beam; wherein the optical beam has an elliptically shaped beam spot on the screen; wherein a major axis of the beam spot is substantially perpendicular to a scanning direction; wherein a horizontal spot size of the optical beam on an exit surface of the optical element is at least or equal to a horizontal spot size of the optical beam on the screen; and the horizontal spot size of the optical beam on the screen is no greater than a horizontal pixel pitch displayed on the screen.