System and method for achieving gray scale DMD operation
First Claim
Patent Images
1. A xerographic system where pixel images from a light source are achieved on a moving photoreceptor across a scan row, the system comprising:
- a modulator for modulating said light source to establish each of said pixel images within said scan row; and
a segmenter for subdividing each said pixel into segmented time periods;
said segmenter including;
an anamorphic light source optic control for compressing modulated light pixels in the direction of movement of said photoreceptor while allowing said modulated light pixels to impact said photoreceptor across said scan row without compression.
1 Assignment
0 Petitions
Accused Products
Abstract
There is disclosed a system for enhancing resolution of a xerographic process by submodulation of each individual pixel. The submodulation is achieved by anamorphically reducing the square pixel presentation of light rays to a rectangle having a number of controllable segments within each square pixel scan line. By controlling the presentation of light rays to selected segments within each pixel gray scale an enhanced resolution can be achieved.
-
Citations
41 Claims
-
1. A xerographic system where pixel images from a light source are achieved on a moving photoreceptor across a scan row, the system comprising:
-
a modulator for modulating said light source to establish each of said pixel images within said scan row; and a segmenter for subdividing each said pixel into segmented time periods;
said segmenter including;an anamorphic light source optic control for compressing modulated light pixels in the direction of movement of said photoreceptor while allowing said modulated light pixels to impact said photoreceptor across said scan row without compression. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. The method of creating gray scale on a printed medium using a xerographic process wherein a modulated light source forms individually controllable pixel images on a rotating photoreceptor, said method including the steps of:
-
presenting said modulated light as individual pixels to said photoreceptor across a row; and compressing said modulated light pixels in the direction of rotation of said drum while allowing said light pixels to impact said drum across said row without compression. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A method of creating a xerographic printing process where pixel images from a light source are achieved on a moving photoreceptor across a scan row, the method comprising the steps of:
-
modulating said light source to establish each of said pixel images in each said scan row; and subdividing each said pixel into segmented time periods, said segmenter including; compressing modulated light pixels in the direction of movement of said photoreceptor while allowing said modulated light pixels to impact said photoreceptor across said scan row without compression. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
-
24. A DMD system comprising:
-
a light source; a DMD array of pixels, each pixel being rotatable to focus light from said light source onto a medium for a time period; a system for dividing each said time period into segments. - View Dependent Claims (25, 26, 27, 28, 29)
-
-
30. A xerographic system where pixel images from a light source are achieved on a moving photoreceptor across a scan row, the system comprising:
-
a modulator for modulating said light source to establish each of said pixel images within said scan row; and a segmenter for subdividing each said pixel row into segmented time periods;
said segmenter including a selectable controllable light source operable for changing the light intensity in accordance with said segmented time periods. - View Dependent Claims (31, 32, 33, 34, 35, 36)
-
-
37. The method of creating gray scale on a printed medium using a xerographic process wherein a modulated light source forms individually controllable pixel images on a rotating photoreceptor, said method including the steps of:
-
presenting said modulated light as individual pixels to said photoreceptor across a row; and having the intensity of said light source in concert with the rotation of said photoreceptor. - View Dependent Claims (38, 39, 40, 41)
-
Specification