# US 10,769,973 B2 · Image display device and adjusting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,769,973 B2 - Document ID: US10769973B2 - Status: Granted - Kind: B2 - Application number: 15/558,145 - Filed: 2016-03-16 - Published: 2018-02-15 - Granted: 2020-09-08 - Earliest claimed: 2015-03-27 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Takao Hirakura - Web page: https://patentgrep.com/patent/US10769973B2 ## CPC - G09G 3/007: {Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels} - G03B 21/14: Details - H04N 9/3105: {for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators (simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10)} - H04N 9/317: {Convergence or focusing systems (electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53)} - H04N 9/3188: {Scale or resolution adjustment (scaling in general G06T3/40; resolution modifying circuits for displays in general G09G5/391)} - 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) - 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 The position of an image is varied to thereby make it possible to achieve an increase in resolution, and at the same time, easily readjust the variation. The projector includes a vibratory device functioning as an image displacement section adapted to vary the position of the image displayed by the display section, and a control section adapted to control the vibratory device. The control section is provided with a plurality of variable resistors each adapted to adjust amplitude of a drive signal adapted to control a shift amount as the variation of the position of the image due to the vibratory device. ## Claims ### Claim 1 An image display device including: a display section adapted to display an image; a vibratory device adapted to vary a position of the image displayed by the display section; a circuit adapted to output a drive signal, which controls a variation of the position of the image due to the vibratory device; and a processor adapted to control the circuit and the vibratory device, wherein the circuit comprises: a gain adjustment section including: two variable resistors, the two variable resistors including a first variable resistor and a second variable resistor, each variable resistor being adapted to adjust amplitude of the drive signal, and a resistance value of the first variable resistor being configured to be adjusted from outside of the image display device; a first pair of resistors connected in series; and a second pair of resistors connected in series; and an amplifying section including an amplifier, the gain adjustment section being configured to adjust the gain of the amplifying section, the amplifying section being configured to generate the drive signal based on the gain adjusted by the gain adjustment section, and the first variable resistor and the second variable resistor being connected electrically in parallel between the first pair and the second pair of resistors. ### Claim 2 (depends on 1) The image display device according to claim 1, wherein the control section adjusts the resistance value of the one of the two variable resistors based on an operation from the outside of the image display device. ### Claim 3 An adjusting device used for an image display device, the image display device including a processor and a vibratory device adapted to vary a position of an image to be displayed, the adjusting device comprising: a circuit adapted to output a drive signal, which controls a variation of the position of the image due to the vibratory device, the circuit comprising: a gain adjustment section including: two variable resistors, the two variable resistors including a first variable resistor and a second variable resistor, each variable resistor being adapted to adjust amplitude of the drive signal, and a resistance value of the first variable resistor being configured to be adjusted from outside of the image display device; a first pair of resistors connected in series; and a second pair of resistors connected in series; and an amplifying section including an amplifier, the gain adjustment section being configured to adjust the gain of the amplifying section, the amplifying section being configured to generate the drive signal based on the gain adjusted by the gain adjustment section, and the first variable resistor and the second variable resistor being connected electrically in parallel between the first pair and the second pair of resistors. ### Claim 4 (depends on 1) The image display device according to claim 1, wherein the amplifying section further includes two feedback resistors.