# US 7,411,722 B2 · Display system incorporating bilinear electromechanical grating device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,411,722 B2 - Document ID: US7411722B2 - Status: Granted - Kind: B2 - Application number: 11/508,403 - Filed: 2006-08-23 - Published: 2007-03-01 - Granted: 2008-08-12 - Earliest claimed: 2005-08-24 - Assignees: Eastman Kodak Company - Inventors: Marek W. Kowarz - Web page: https://patentgrep.com/patent/US7411722B2 ## CPC - G02B 27/149: {using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes} - G02B 26/0808: {by means of one or more diffracting elements} - G02B 27/102: {for generating a colour image from monochromatic image signal sources} - G02B 27/104: {for use with scanning systems (scanning systems G02B26/10)} - G02B 27/143: {using macroscopically faceted or segmented reflective surfaces} - H04N 9/3132: {using one-dimensional electronic spatial light modulators} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A line scanned display system includes at least three different colors of illumination provided by one or more light sources, and at least one directional illumination optical system for directing the three different colors of illumination. Also in the system is a bilinear array, having two linear arrays of light modulating devices, situated on a common substrate for receiving and modulating two different colors of illumination at any one time that are obtained from the three different colors of illumination. Finally, a lens for creating line images of the two linear arrays on a screen and a scanning mirror for scanning the line images across the screen to form an area image complete the system. ## Claims ### Claim 1 A line scanned display system, comprising: a) at least three different colors of illumination provided by one or more light sources; b) at least one directional illumination optical system for directing the at least three different colors of illumination; c) a bilinear array having two linear arrays of light modulating devices situated on a common substrate for receiving and modulating two different colors of illumination at any one time that are obtained from the at least three different colors of illumination; d) a lens for creating line images of the two linear arrays on a screen; and e) a scanning mirror for scanning the line images across the screen to form an area image. ### Claim 2 (depends on 1) The display system claimed in claim 1, wherein the directional illumination optical system includes a patterned mirror assembly having reflective and transparent regions. ### Claim 3 (depends on 2) The display system claimed in claim 2, wherein the patterned mirror assembly includes a single continuous reflective region. ### Claim 4 (depends on 2) The display system claimed in claim 2, wherein the patterned mirror assembly includes two separated reflective regions. ### Claim 5 (depends on 1) The display system claimed in claim 1, wherein the two linear arrays of light modulating devices are either conformal grating electromechanical devices, grating light valves, or flexible micromirror linear arrays. ### Claim 6 (depends on 1) The display system claimed in claim 1, wherein the at least three different colors of illumination include red, green, and blue. ### Claim 7 (depends on 6) The display system claimed in claim 6, wherein the at least three different colors of illumination further include cyan, yellow, or magenta. ### Claim 8 (depends on 1) The display system claimed in claim 1, wherein the at least one directional illumination optical system includes a dichroic combiner. ### Claim 9 (depends on 1) The display system claimed in claim 1, wherein the directional illumination optical system combines two of the at least three different colors of illumination and directs the two colors of illumination along a common illumination path and onto one linear array of light modulating devices. ### Claim 10 (depends on 1) The display system claimed in claim 1, wherein at least one of the colors is formed by a mixture of light from two sources. ### Claim 11 (depends on 1) The display system claimed in claim 1, wherein the light sources are lasers. ### Claim 12 A method for displaying a full color image on a screen, comprising the steps of: a. forming a first subframe of the full color image by i) projecting a first set of two modulated line images onto the screen, wherein the first set of two modulated line images has a first and second line color; ii) scanning the first set of two modulated line images across the screen to generate the first subframe; b. forming a second subframe of the full color image by i) projecting a second set of two modulated line images onto the screen, wherein the second set of two modulated line images has a third and fourth line color; wherein at least three of the four above line colors are different from each other; ii) scanning the second set of two modulated line images across the screen to generate the second subframe; and c. repeating steps a and b at a predetermined frequency. ### Claim 13 (depends on 12) The method claimed in claim 12, wherein the two modulated line images within a set are spatially separated on the screen at any one moment in time. ### Claim 14 (depends on 13) The method claimed in claim 13, further comprising the step of synchronizing an image data stream according to a distance between the two spatially separated modulated line images. ### Claim 15 (depends on 12) The method claimed in claim 12, wherein at least one line color of the four line colors is formed from a mixture of two colors. ### Claim 16 (depends on 15) The method claimed in claim 15, wherein the full color image has a reduced color gamut as a result of the two mixed colors. ### Claim 17 (depends on 15) The method claimed in claim 15, wherein the mixture is yellow, cyan or magenta. ### Claim 18 (depends on 12) The method claimed in claim 12, wherein a third subframe is formed having a third set of two modulated line images with at least one new line color with respect to the first and second subframes. ### Claim 19 (depends on 12) The method claimed in claim 12, wherein one of the colors in the first subframe is the same as one of the line colors in the second subframe. ### Claim 20 (depends on 12) The method claimed in claim 12, wherein the four line colors include red, green, and blue.