# US 12,002,188 B2 · Optical module and virtual image display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,188 B2 - Document ID: US12002188B2 - Status: Granted - Kind: B2 - Application number: 18/300,342 - Filed: 2023-04-13 - Published: 2023-08-17 - Granted: 2024-06-04 - Earliest claimed: 2020-10-30 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Masayuki Takagi; Nobuhiko Yokoo - Web page: https://patentgrep.com/patent/US12002188B2 ## CPC - G02B 17/0816: {off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements} - G06T 5/80: Geometric correction - G02B 17/008: {Systems specially adapted to form image relays or chained systems} - G02B 27/0172: {characterised by optical features} - G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)} - G02B 5/04: Prisms - G02B 2027/011: {comprising device for correcting geometrical aberrations, distortion} - G02B 2027/014: {comprising information/image processing systems} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 2300/0439: Pixel structures - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - 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) ## Abstract An optical module according to the present disclosure includes: a first display panel that emits a first image light, a first virtual image optical system that forms a first exit pupil of the first image light, and a control unit corrects a video image signal to a first correction video signal based on distortion generated in the first optical system, an aspect ratio of the video image signal being smaller than an aspect ratio of the first display panel, wherein the control unit causes the first display panel to emit the first image light from the first display panel based on the first correction video image signal. ## Claims ### Claim 1 An optical module comprising: a first display panel; a first optical system that forms an exit pupil; and a control unit that corrects an input image to a first image based on distortion generated in the first optical system, an aspect ratio of the input image being smaller than an aspect ratio of the first display panel, wherein the control unit causes the first display panel to display the first image, and the control corrects the input image such that a first length corresponding to a center of the first image in the first direction is different from a second length corresponding to an end of the first image in the first direction, the first direction along an input line on the first display panel. ### Claim 2 (depends on 1) The optical module according to claim 1, wherein a resolution of the input image is equal to a resolution of the first display panel. ### Claim 3 (depends on 1) The optical module according to claim 1, wherein, in the first display panel, a pitch between pixels on an upper side in a second direction intersecting the first direction is larger than a pitch between pixels on a lower side. ### Claim 4 (depends on 1) The optical module according to claim 1, wherein in the first display panel, a pixel size of a pixel on an upper side in a second direction intersecting the first direction is larger than a pixel size of a pixel on a lower side in the second direction. ### Claim 5 (depends on 4) The optical module according to claim 4, wherein PY=−2.565e−9×v3+1.850e−5×v2−4.635e−2×v+66 (1) where the pixel size is PY and a coordinate of the pixel in the second direction of the first display panel is v. ### Claim 6 (depends on 1) The optical module according to claim 1, wherein an aspect ratio of the first image is equal to the aspect ratio of the first display panel. ### Claim 7 (depends on 1) The optical module according to claim 1 further comprising: a second display panel; and a second optical system that forms a second exit pupil, wherein the control unit corrects an input image to a second image based on distortion generated in the second optical system, the aspect ratio of the input image being smaller than an aspect ratio of the second display panel, and the control unit causes the second display panel to display the second image. ### Claim 8 (depends on 1) The optical module according to claim 1, wherein the optical module is non-axisymmetric in the second direction. ### Claim 9 (depends on 1) A virtual image display device comprising the optical module according to claim 1. ### Claim 10 (depends on 9) The virtual image display device according to claim 9, wherein the virtual image display device is a head-mounted display device. ### Claim 11 (depends on 1) The optical module according to claim 1, wherein the control unit corrects the input image such that the second length is longer than the first length. ### Claim 12 (depends on 1) The optical module according to claim 1, wherein the control unit corrects the input image such that a third length corresponding to an one side of the first image in a second direction intersecting the first direction is different from a fourth length corresponding to another side of the first image in the second direction. ### Claim 13 (depends on 12) The optical module according to claim 12, wherein the second direction is a vertical direction in the first display panel, the one side of the first image is an upper side of the first image in the second direction, the other side of the first image is lower side of the first image in the second direction, and the control unit corrects the input image such that the third length is longer than the fourth length.