# US 11,443,705 B2 · Image display device for displaying moving images > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,443,705 B2 - Document ID: US11443705B2 - Status: Granted - Kind: B2 - Application number: 17/291,311 - Filed: 2019-11-06 - Published: 2022-01-06 - Granted: 2022-09-13 - Earliest claimed: 2018-11-13 - Assignees: Sony Group Corporation - Applicants: Sony Group Corporation - Inventors: Yoshihisa Sato; Takahiro Mochizuki - Web page: https://patentgrep.com/patent/US11443705B2 ## CPC - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - G09G 3/36: using liquid crystals - G02F 1/13306: {Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence)} - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - G03B 21/00: Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) - G09G 3/346: {based on modulation of the reflection angle, e.g. micromirrors (micromirrors devices per se G02B26/0833)} - H04N 5/74: Projection arrangements for image reproduction, e.g. using eidophor - G02F 1/133622: {Colour sequential illumination} - G02F 1/13471: {in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence)} - G09G 2320/064: by time modulation of the brightness of the illumination source - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Provided is a device that displays a moving image with high dynamic range. A control unit controls drive of at least one of a light source unit, a phase modulation unit, or an intensity modulation unit in accordance with an image signal. The light source unit applies first illumination light to a phase modulation panel of the phase modulation unit, which modulates a phase of the first illumination light applied from the light source unit, divides second illumination light for each predetermined phase modulation pixel group of the phase modulation panel, and applies the second illumination light to the intensity modulation panel for each predetermined intensity modulation pixel group of the intensity modulation panel, and the intensity modulation panel modulates an intensity of the second illumination light applied from the phase modulation panel. ## Claims ### Claim 1 An image display device comprising at least: a control unit; a light source unit; a phase modulation unit; and an intensity modulation unit, wherein the control unit controls drive of at least one of the light source unit, the phase modulation unit, or the intensity modulation unit in accordance with an image signal, wherein the light source unit emits invisible light, wherein the phase modulation unit includes a phase modulation panel constituted by a plurality of phase modulation pixel groups, wherein the intensity modulation unit includes an intensity modulation panel constituted by a plurality of intensity modulation pixel groups, wherein the light source unit applies first illumination light to the phase modulation panel, wherein the phase modulation panel modulates a phase of the first illumination light applied from the light source unit, divides second illumination light for each predetermined phase modulation pixel group, and applies the second illumination light to the intensity modulation panel for each predetermined intensity modulation pixel group, and wherein the intensity modulation panel modulates an intensity of the second illumination light applied from the phase modulation panel. ### Claim 2 (depends on 1) The image display device according to claim 1, wherein the phase modulation panel and the intensity modulation panel are rewritten line-sequentially or in a similar order. ### Claim 3 (depends on 1) The image display device according to claim 1, wherein the phase modulation panel and/or the intensity modulation panel is a liquid crystal element. ### Claim 4 (depends on 1) The image display device according to claim 1, wherein the phase modulation panel and/or the intensity modulation panel is a MEMS mirror. ### Claim 5 (depends on 1) The image display device according to claim 1, wherein the phase modulation panel applies the second illumination light in such a way that side edges of adjacent pieces of the second illumination light overlap each other. ### Claim 6 (depends on 1) The image display device according to claim 1, further comprising: a plurality of the light source units; a plurality of the phase modulation panels; a plurality of the intensity modulation panels; and a multiplexer, wherein each of the plurality of light source units emits the first illumination light in red, green, or blue, wherein each of the plurality of phase modulation panels emits the second illumination light in red, green, or blue, wherein each of the plurality of intensity modulation panels emits third illumination light in red, green, or blue, and wherein the multiplexer combines and emits the third illumination light emitted from each of the plurality of intensity modulation panels. ### Claim 7 (depends on 6) The image display device according to claim 6, wherein the multiplexer combines pieces of thc illumination light by allowing light of a predetermined wavelength to pass through and reflecting light of other wavelengths. ### Claim 8 (depends on 6) The image display device according to claim 6, wherein the multiplexer is a dichroic prism. ### Claim 9 (depends on 1) The image display device according to claim 1, further comprising: a color separator; a plurality of the phase modulation panels; a plurality of the intensity modulation panels; and a multiplexer, wherein the color separator separates color elements of white illumination light emitted from the light source unit into red, green, or blue, and applies the first illumination light to each of the plurality of phase modulation panels, wherein each of the plurality of phase modulation panels emits the second illumination light in at least red, green, and blue, wherein each of the plurality of intensity modulation panels emits third illumination light in at least red, green, and blue, and wherein the multiplexer combines and emits the third illumination light emitted from each of the plurality of intensity modulation panels. ### Claim 10 (depends on 9) The image display device according to claim 9, wherein the color separator separates the color elements of the white illumination light by allowing light of a predetermined wavelength to pass through and reflecting light of other wavelengths. ### Claim 11 (depends on 9) The image display device according to claim 9, wherein the color separator is a dichroic prism. ### Claim 12 An image display device comprising at least: a control unit; a plurality of light source units; a plurality of phase modulation units; a plurality of intensity modulation units; and a multiplexer, wherein the control unit controls drive of at least one of the plurality of light source units, the plurality of phase modulation units, or the plurality of intensity modulation units in accordance with an image signal, wherein each of the plurality of phase modulation units include a phase modulation panel constituted by a plurality of phase modulation pixel groups, wherein each of the plurality of intensity modulation units include an intensity modulation panel constituted by a plurality of intensity modulation pixel groups, wherein each of the plurality of light source units apply a first illumination light to each of the plurality of phase modulation panels, wherein each of the plurality of phase modulation panels modulates a phase of the first illumination light applied from each of the plurality of light source units, divides second illumination light for each predetermined phase modulation pixel group, and applies the second illumination light to each of the plurality of intensity modulation panels for each predetermined intensity modulation pixel group, wherein each of the plurality of intensity modulation panels modulates an intensity of the second illumination light applied from each of the plurality of phase modulation panels, wherein each of the plurality of light source units emits the first illumination light in red, green, or blue, wherein each of the plurality of phase modulation panels emits the second illumination light in red, green, or blue, wherein each of the plurality of intensity modulation panels emits third illumination light in red, green, or blue, and wherein the multiplexer combines and emits the third illumination light emitted from each of the plurality of intensity modulation panels. ### Claim 13 (depends on 12) The image display device according to claim 12, wherein the plurality of light source units emit coherent light. ### Claim 14 (depends on 12) The image display device according to claim 12, wherein the plurality of light source units emit a laser beam. ### Claim 15 (depends on 12) The image display device according to claim 12, wherein the plurality of light source units emits invisible light. ### Claim 16 An image display device comprising at least: a control unit; a plurality of light source units; a plurality of phase modulation units; a plurality of intensity modulation units; a multiplexer; and a color separator, wherein the control unit controls drive of at least one of the plurality of light source units, the plurality of phase modulation units, or the plurality of intensity modulation units in accordance with an image signal, wherein each of the plurality of phase modulation units include a phase modulation panel constituted by a plurality of phase modulation pixel groups, wherein each of the plurality of intensity modulation units include an intensity modulation panel constituted by a plurality of intensity modulation pixel groups, wherein each of the plurality of light source units apply a first illumination light to each of the plurality of phase modulation panels, wherein each of the plurality of phase modulation panels modulates a phase of the first illumination light applied from each of the plurality of light source units, divides second illumination light for each predetermined phase modulation pixel group, and applies the second illumination light to each of the plurality of intensity modulation panels for each predetermined intensity modulation pixel group, wherein each of the plurality of intensity modulation panels modulates an intensity of the second illumination light applied from each of the plurality of phase modulation panels, wherein the color separator separates color elements of white illumination light emitted from a light source unit of the plurality of light source units into red, green, or blue, and applies the first illumination light to each of the phase modulation panels, wherein each of the plurality of phase modulation panels emits the second illumination light in at least red, green, and blue, wherein each of the plurality of intensity modulation panels emits third illumination light in at least red, green, and blue, and wherein the multiplexer combines and emits the third illumination light emitted from each of the plurality of intensity modulation panels. ### Claim 17 (depends on 16) The image display device according to claim 16, wherein the plurality of light source units emit coherent light. ### Claim 18 (depends on 16) The image display device according to claim 16, wherein the plurality of light source units emit a laser beam. ### Claim 19 (depends on 16) The image display device according to claim 16, wherein at least one of the plurality of light source units emits invisible light. ### Claim 20 (depends on 16) The image display device according to claim 16, wherein the color separator is a dichroic prism.