Dual and multi-modulator projector display systems and techniques are disclosed. In one embodiment, a projector display system comprises a light source; a controller, a first modulator, receiving light from the light source and rendering a halftone image of said the input image; a blurring optical system that blurs said halftone image with a Point Spread Function (PSF); and a second modulator receiving the blurred halftone image and rendering a pulse width modulated image which may be projected to form the desired screen image. Systems and techniques for forming a binary halftone image from input image, correcting for misalignment between the first and second modulators and calibrating the projector systeme.g. over timefor continuous image improvement are also disclosed.

A display panel, a display device as well as a control method and preparation method thereof. The display panel comprises: a filter provided with a light transmission part and a non-light transmission part corresponding to each pixel; a micro mirror array assembly comprising a substrate and a micro mirror array arranged on the substrate, the micro mirror array being provided with at least one micro mirror corresponding to each pixel; wherein mirror surfaces of the micro mirrors of the micro mirror array are arranged to substantially face towards the filter so as to enable light rays reflected by the micro mirrors to be emitted to the filter, and rotation of each of the micro mirrors on the substrate is controlled so as to enable the reflected light rays to be controllably reflected to the light transmission part and/or the non-light transmission part of the corresponding pixel.

Techniques for reducing blend artifacts in a multiple digital projector system are provided, including a first and second projector, having respective projection fields which overlap in a blend zone and one or more control devices configured to: for a given pixel of a common image frame projected by both the first projector and the second projector in the blend zone, the given pixel of the common image frame comprising a plurality of bitplanes arranged in a sequence, control the first projector to project a first portion of the plurality of bitplanes according to the sequence; and control the second projector to project a second portion of the plurality of bitplanes according to the sequence, the second portion complementary to the first portion, such that in the common image frame only one of the first projector and the second projector projects any given bitplane of the plurality of bitplanes.

A discharge lamp driving device includes a discharge lamp driving unit; and a control unit, in which the control unit controls the discharge lamp driving unit so that a first driving current which causes a first electrode to serve as an anode and a second driving current which causes a second electrode to serve as an anode are alternately supplied to the discharge lamp, a period of the first driving current is changed according to a periodic first pattern, and a period of the second driving current is changed according to a periodic second pattern, in which the first pattern and the second pattern are patterns in which the length of the periods over which the respective driving current is supplied decrease over time within each cycle of the pattern, and in which the cycle of the first pattern is phase-shifted relative to the cycle of the second pattern.

For an example method of reducing diffraction artifacts in a displayed image from a digital image projection system, a digital controller is coupled to a spatial light modulator. The spatial light modulator includes a two dimensional array of pixels. The method includes receiving signals containing pixel image data and processing the pixel image data to determine a desired gray scale for a pixel. The desired gray scale is compared to achievable gray scales of the digital image projection system. An upper bounding achievable gray scale is determined, and a lower bounding achievable gray scale is determined. Also, a dithering percentage for the desired gray scale is determined. The method chooses one of the upper bounding achievable gray scale and the lower bounding achievable gray scale. Also, a modified lower bounding gray scale is chosen to reduce the dithering percentage.

A high dynamic range projector (HDRP) is configured with at least one spatial light modulator having red, green and blue digital light projector (DPL) chips, a light laser source including red, green and blue (RGB) light laser systems which are operative to illuminate respective DLP chips; and a central processing unit (CPU) coupled to the DLP engines and respective RGB light laser systems, wherein the CPU is operative to determine an optimal average power of each of the RGB light laser systems at a frame rate based on a desired contrast ratio.

In described examples, a method includes: receiving an array of image data pixels for display by a spatial light modulator; dividing the array of image data pixels into a plurality of blocks. For the blocks of the plurality of blocks, the method includes: computing a mean value for pixels in the block; computing a variance for pixels in the block; and, in response to the mean value and the variance, retrieving an indicator of a likelihood of a visible artifact for the block; and in response to the retrieved indicator, outputting a signal to selectively increase or reduce a load time of the spatial light modulator for displaying the array of image data pixels.

An image display device includes: a light source unit that sequentially supplies light of a plurality of colors; an image formation unit that is provided with a pixel region that is made up of a plurality of pixels, light of a plurality of colors supplied by the light source unit sequentially irradiating the pixel region, and images of a plurality of colors being sequentially formed by the modulation of the incident light by each of the pixels; and a controller that controls the image-forming operation of the image formation unit. The controller causes formation of images of at least one color among the plurality of colors with pixel combinations made up of a plurality of pixels as pixel units and individually controls each pixel that make up the pixel combinations.

The image display device of the present invention includes: a light source unit; image formation means that is provided with a pixel region made up of a plurality of pixels, light supplied from the light source unit being incident to this pixel region, and an image being formed by the modulation of the incident light by each of the pixels; and a control means (10) that controls the image-forming operation of the image formation means. The control means causes formation of an image with pixel combinations formed from a plurality of pixels as pixel units and individually controls the ON state and OFF state of each pixel that makes up the pixel combinations.

Dual and multi-modulator projector display systems and techniques are disclosed. In one embodiment, a projector display system comprises a light source; a controller, a first modulator, receiving light from the light source and rendering a halftone image of said the input image; a blurring optical system that blurs said halftone image with a Point Spread Function (PSF); and a second modulator receiving the blurred halftone image and rendering a pulse width modulated image which may be projected to form the desired screen image. Systems and techniques for forming a binary halftone image from input image, correcting for misalignment between the first and second modulators and calibrating the projector systeme.g. overtimefor continuous image improvement are also disclosed.