A light projecting device including an image resolution enhancing mechanism that spatially offsets at least one pixel between an original pixel position and an offset pixel position. The image resolution enhancing mechanism includes a dual mirror mechanism to provide the spatial offset.
A tilting device is disclosed which tilts the light reflected from a Digital Micro-mirror device by a certain angle and projects it to a screen. The tilting device, comprising a first reflector surface, a second reflector surface inclined at a predetermined angle with regard to the first reflector surface, a holder attached to the bottom of the first reflector surface and the second reflector surface, and a driving part that provides rotational force to the holder, wherein the first reflector surface and the second reflector surface are rotated by the driving part to sequentially reflect light emitted from a Digital Micro-mirror device, not only provides a smooth and natural display with invisible grids but also allows more stable and more accurate tilting.
A projection optical system that performs enlargement projection of an image on a display device surface formed of a plurality of pixels onto a screen surface, in which pixel shift by less than a pixel pitch is performed on the screen surface in a vertical direction, a horizontal direction, an oblique direction, or a vertical and horizontal directions, and in which conditional formulae (1) and (2) below are fulfilled over the entire image range: (1)|.DELTA.RG|.ltoreq.0.5 d and (2)|.DELTA.BG|.ltoreq.0.5 d, where d represents the amount of pixel shift (>0), .DELTA.RG represents lateral chromatic aberration in the direction of pixel shift of colored light R having a wavelength of 640 nm with respect to colored light G having a wavelength of 546 nm, and .DELTA.BG represents lateral chromatic aberration in the direction of pixel shift of colored light B having a wavelength of 450 nm with respect to the colored light G having a wavelength of 546 nm.
A concept of improving a resolution by using human's visual characteristics is provided. A display device includes an image forming unit forming an image by using an emitted light and an inputted image signal, a projection unit projecting the image formed by the image forming unit onto a screen, and a movable displacement plate displacing the image displayed on the screen. As a result, a viewer can view the image at an improved resolution.
