Color matrix display apparatus and method for designing said apparatus

Claim 1

A color matrix display apparatus comprising a matrix display having a viewing face and comprising a regular structure of pixels which are selectively energized to create an image, characterized by: a two-dimensional diffraction grating reconstruction filter (10,20,31,42) positioned proximate and in front of said matrix display (30) viewing face which uses the phenomenon of diffraction to filter the image, the diffraction grating breaking each pixel image up into various diffraction orders in two-dimensions as it passes through the grating, whereby the diffracted pixels overlap and cause interpolation among the pixels thereby minimizing the high frequency energy and detection of the underlying grid structure and improving the image.

Claim 17

A method for designing a diffraction grating optical reconstruction filter for a color mosaic (or matrix) display comprising the steps: providing a flat panel two-dimensional color matrix display having regular structures of color pixels of a plurality of primary colors, said flat panel display having an inherent underlying grid structure which results in objectionable visual artifacts in the display commonly referred to as sampling noise; specifying each primary color lattice in the display; determining lattice as defined by each primary color alone; determining spatial frequency pattern of lattice by taking Fourier Transform; determining Nyquist boundaries by, from reference point drawing a ray to each nearest neighbor point, at midpoint of each ray drawing a perpendicular line, the region circumscribed is maximum frequency capability of the color mosaic diaplay, the collection of perpendicular bisectors comprise the Nyquist boundaries themselves; select interpolation waveform, one dimensional; making one dimensional waveform into two-dimensional waveforms by rotating it through two dimensions and by adjusting its relative extent in accordance with the shape of the region circumscribed by the Nyquist boundaries thereby defining the desired point spread function of the grating in combination with the eye; making the grating have point spread function minus the impact of the eye; and, placing the grating over the panel at a distance t.

Claim 18

A method for designing a diffraction grating optical reconstruction filter for a color mosaic (or matrix) display comprising the steps: providing a flat panel two-dimensional color matrix display having regular structures of color pixels of a plurality of primary colors, said flat panel display having an inherent underlying grid structure which results in objectionable visual artifacts in the display commonly referred to as sampling noise; specifying each primary color lattice in the display; determining lattice as defined by each primary color alone; determining spatial frequency pattern of lattice by taking Fourier Transform; determining Nyquist boundaries by, from reference point drawing a ray to each nearest neighbor point, at midpoint of each ray drawing a perpendicular line, the region circumscribed is maximum frequency capability of the color mosaic diaplay, the collection of perpendicular bisectors comprise the Nyquist boundaries themselves; select interpolation waveform, one dimensional; making one dimensional waveform into two-dimensional waveforms by rotating it through two dimensions and by adjusting its relative extent in accordance with the shape of the region circumscribed by the Nyquist boundaries thereby defining the desired point spread function of the grating in combination with the eye; making the grating have point spread function minus the impact of the eye; and, placing the grating over the panel at a distance t.