Patent ID: 8619352
Filing Date: 2013-12-31
Classification: G02B,H01L

Abstract:
1. A projection apparatus, comprising: a laser light source emitting an illumination light and a mirror device comprising a plurality of mirror elements each having a micromirror for modulating the illumination light and reflecting a modulated light to a projection lens having a depth of focus to project and focus the modulated light as an image projection light on an image display surface to display an image; a device substrate for supporting the mirror device; and a cover glass disposed between the mirror device and the projection lens and placed onto the device substrate covers over a top surface of the mirror device, wherein the distance between a top surface of the mirror and the bottom surface of the cover glass facing the mirror is larger than the depth of focus of the projection lens and at least ten to one-hundred times of a size of the micromirror wherein the projection lens is disposed above the cover glass opposite the mirror device.