Abstract:
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 system - e.g. over time - for continuous image improvement are also disclosed.
Abstract:
An optical engine for image projection having one or more light sources such as LED's or lasers producing light that is then collected and directed onto a common illumination through a polarizing beam splitter that reflects light of one polarisation and transmits light of the other polarisation onto two reflective LCoS panels, one adapted for use with the reflected light and the other with the transmitted light, both panels reflecting their respective light and producing images that are then reflected from each of the panels and superimposed passing through a projection system to project the image out of the optical engine
Abstract:
A method of color correcting a display is provided. Initially, uncorrected color values are used to produce images whose color characteristics are measured, specifically including luminance. Then, corrected color values are calculated such that the luminance of the corrected color values are the same as that produced by the uncorrected color values. The corrected color values are then used to produce images whose color characteristics are measured. A determination is made as to whether the corrected color values produce images having acceptable luminance and color characteristics, where acceptable luminance is based on the luminance obtained using the uncorrected color values. If not, a new set of corrected color values are produced. The process repeats until acceptable/desirable color characteristics are achieved. The method is useful for obtaining look-up table values, and for single-panel LCDs that use look-up tables. An interpolation technique for sparsely filled look-up tables is also provided.
Abstract:
A color sequential display operative in one of two alternate modes. The first mode is a color sequential mode in which primary color images are displayed in successive frames while respective background light sources are simultaneously flashed on the display. The second mode is a monochrome mode in which the luminance Y signal is displayed in successive frames along with flashes of background white light.
Abstract:
A single-panel LCD projection system (50) includes a color prefilter (52) positioned between an illumination system (54) and a multi-color LCD (56). The color prefilter (52) functions to shape the spectrum of illumination provided by the illumination system (54) so as to increase relative panel transmission and to reduce heat absorption by color component filters (58R, 58G, 58G) incorporated in the LCD. The color prefilter (52) is selected to eliminate from or greatly reduce in the illumination light the intensity of certain wavebands that do not materially contribute to generating pure primary colors.
Abstract:
The device includes a) flat mirror (7) formed by adjacent areas (5i, 6i) that are alternately transparent and reflecting with parallel and straight lines of demarcation, b) identical first (4) and second (4') reflection holograms, each delivering at least one diffracted beam with a predetermined spectral composition, c) illuminating source (1) for illuminating said holograms (4, 4') at normal incidence by the intermediary of said mirror (7), said holograms (4, 4') being arranged symmetrically with respect to the plane of said mirror (7) in such a way as to be illuminated by the intermediary of transparent (6i) and reflecting (5i) strips, respectively, of mirror (7), and in such a way that the beams diffracted by the first and second holograms are reflected and transmitted, respectively, by reflecting (5i) and transparent (6i) strips, respectively, of mirror (7), in order to be combined into a continuous light beam with said spectral composition. 00000