Abstract: Higher quality printing is difficult in implementation in spatial light modulator printers. The two major problems are accomplishing gray scale within the line time constraints, and eliminating staircasing artifacts within the images printed (81). It can be improved by using an alternate way of resetting cells on the spatial light modulator when data is being loaded onto the cells, timing delay (86), horizontal offset (84), and differently sized pixels (80, 82).

Abstract: Higher quality printing is difficult in implementation in spatial light modulator printers. The two major problems are accomplishing gray scale within the line time constraints, and eliminating staircasing artifacts within the images printed (81). It can be improved by using an alternate way of resetting cells on the spatial light modulator when data is being loaded onto the cells, timing delay (86), horizontal offset (84), and differently sized pixels (80, 82).

Abstract: Higher quality printing is difficult in implementation in spatial light modulator printers. The two major problems are accomplishing gray scale within the line time constraints, and eliminating staircasing artifacts within the images printed (81). It can be improved by using an alternate way of resetting cells on the spatial light modulator when data is being loaded onto the cells, timing delay (86), horizontal offset (84), and differently sized pixels (80, 82).

Abstract: A device for patterning an imaging member (46) is provided. The device comprises a light source (24) which emits light rays (26). Light rays (26) pass through a collimator lens (28) to collimate the light rays (30). The light then strikes a spatial light modulator (32) which is controlled by a computer (40) to reflect the light (42). The light passes through an imaging lens (44) to magnify the pattern for striking imaging member (46). Imaging member (46) is thus patterned by changing modulator (32) by computer (40).

Abstract: Higher quality printing is difficult in implementation in spatial light modulator printers. The two major problems are accomplishing gray scale within the line time constraints, and eliminating staircasing artifacts within the images printed (81). It can be improved by using an alternate way of resetting cells on the spatial light modulator when data is being loaded onto the cells, timing delay (86), horizontal offset (84), and differently sized pixels (80, 82).

Abstract: Higher quality printing is difficult in implementation in spatial light modulator printers. The two major problems are accomplishing gray scale within the line time constraints, and eliminating staircasing artifacts within the images printed (81). It can be improved by using an alternate way of resetting cells on the spatial light modulator when data is being loaded onto the cells, timing delay (86), horizontal offset (84), and differently sized pixels (80, 82).

Abstract: A digital accelerometer manufactured from arrays 11a-11e of micro-mechanical sensing elements 12. The sensing elements 12 of different arrays 11a-11e are designed for detecting acceleration in a particular rotational or translational direction, such that their response to acceleration in other directions is minimized. Further, the sensing elements 12 have size and proof mass parameters that may be adjusted to vary their frequency response and sensitivity to amplitude of acceleration. Arrays 11a-11e of sensing elements 12 provide detection of a range of frequency levels and amplitudes at each frequency. At an appropriate frequency and amplitude of an applied acceleration, a sensing element 12 moves to contact an electrode 126, producing an electrical signal, which may be stored as a data bit.

Abstract: A device (40) for patterning an imaging member (46) is provided. The device (40) comprises a light source (42) which emits light rays (44). Light rays (44) pass through a collimator (45) to collimate the light rays (48). The light then strikes a spatial light modulator (50) which is controlled by a computer (52) to reflect the light (54). The light passes through an imaging member (56) to demagnify the pattern for striking imaging member (46). Imaging member (46) is thus patterned by changing modulator (50) by computer (52).

Abstract: Higher quality printing is difficult in implementation in spatial light modulator printers. The two major problems are accomplishing gray scale within the line time constraints, and eliminating staircasing artifacts within the images printed (81). It can be improved by using an alternate way of resetting cells on the spatial light modulator when data is being loaded onto the cells, timing delay (86), horizontal offset (84), and differently sized pixels (80, 82).

Abstract: There is disclosed an optic system for illuminating a spatial light modulator array in a xerographic printing process consisting of an array of LED emitters constructed to efficiently replace the conventional tungsten source used in prior art. The array of LED emitters can be geometrically configured or electrically operated by strobing or varying the brightness of individual pixels to compensate for other system optical deficiencies and results in improved printing process. By exposure strobing the LED source correction for fuzzy line edges can be achieved.

Abstract: A display system (20) that uses multiple SLMs (25) to enhance horizontal or vertical resolution, or both. For example, to approximate a two-fold increase in horizontal resolution, the input data is sampled at a doubled rate, and each SLM (25) receives every other sample. Each SLM (25) generates an image, and the two images are partially superposed with a horizontal offset and simultaneously displayed. The resulting output image has a perceived resolution that approximates that of an image generated by an SLM with twice as many pixels per row.

Abstract: A device for patterning an imaging member (46) is provided. The device comprises a light source (24) which emits light rays (26). Light rays (26) pass through a collimator lens (28) to collimate the light rays (30). The light then strikes a spatial light modulator (32) which is controlled by a computer (40) to reflect the light (42). The light passes through an imaging lens (44) to magnify the pattern for striking imaging member (46). Imaging member (46) is thus patterned by changing modulator (32) by computer (40).

Abstract: A method for gray scale printing combining row integration and pulse width modulation. A spatial light modulator (102) has one line (104) designated to perform PWM within a given line time. Another area of the modulator (106) has lines designated to perform row integration on the print image, allowing for more gray levels. An additional area (108) can be designated to correct for defects in the illumination profile and the printed images.

Abstract: Techniques for achieving high resolution, high-speed gray scale printing with binary spatial light modulators. A spatial light modulator array is divided into subarrays, and the subarrays are illuminated at various levels (510, 512, 514, 516) of a modulated light source. Additionally, each pixel (520) can be divided up into four phases and printed in phase pairs.

Abstract: A method of producing a raster font from a contour font entailing the steps of deriving font metrics and character metrics of font characters in terms of arbitrary font units; scaling the font characters to a selected size and output resolution (pixels per unit length); altering the thickness of vertical and horizontal strokes of each character to a desired thickness, from the measured font metrics and character metrics, and including a difference applied to the thickness of the strokes by the printer process, to cause the strokes to be close to an integer number of pixels and thickness and to compensate for thinning and thickening which the printing engine might produce; bringing the leading and trailing edges of the characters to integer pixel locations, where such locations are based on and scaling the character between the leading and trailing edges proportionally therebetween, and producing a rasterized font from the altered contour font character.

Abstract: A method and apparatus for spatial modulation in the cross-process direction. A spatial light modulator includes an array (12) of individual elements. Light from a light source (14) is reflected from these individual elements onto phases of pixels (20 and 54) of an organic photoconductive drum (16) thereby determining the gray shade of that pixel. The light from the individual elements may be focused through optics (18).

Abstract: There is disclosed a system and method for assembling all of the parts of a xerographic system in a unitary housing. The unitary molded housing contains the xerographic optics, the modulator, the toner and developer cartridges as well as the printer drum. Using this unitary housing, the modulator can be aligned by using optical sensors in substitution for the printing drum during assembly, and can contain other components such as a document scanner that allows the print engine to also be used as a fax machine, or a copier.

Abstract: The method disclosed comprises the steps of directing light to a plurality of modulators where each modulator comprises a mirror rotatably fixed to at least two support members displaced from all outer edges of the mirror and an electrode for rotating the mirror, selecting an angle through which the mirror is to rotate, generating a signal characteristic of the angle, applying the characteristic signal to the electrode, and rotating the mirror through the selected angle.

Abstract: A device for patterning an imaging member (46) is provided. The device comprises a light source (24) which emits light rays (26). Light rays (26) pass through a collimator lens (28) to collimate the light rays (30). The light then strikes a spatial light modulator (32) which is controlled by a computer (40) to reflect the light (42). The light passes through an imaging lens (44) to magnify the pattern for striking imaging member (46). Imaging member (46) is thus patterned by changing modulator (32) by computer (40).

Abstract: A semiconductor device comprises a plurality of groups of colored cells controllable by electronic circuitry. Each group of colored cells absorb or reflect specified wavelengths of visible light. The electronic signals control the pathways on which each individual cell reflects incident light. A first process for manufacturing such a color spatial light modulator ("SLM") includes aligning a dye-bearing substrate over the spatial light modulator and causing specified portions of the dye to sublimate off of the substrate and condense onto particular cell elements of the spatial light modulator. A second process for producing a colored spatial light modulator places an electrostatic charge in a dye cloud and introduces the charged cloud to the SLM. The dye migrates to those selected cells containing an opposite electrical charge.