# US 11,908,355 B2 · Projection method and projector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,908,355 B2 - Document ID: US11908355B2 - Status: Granted - Kind: B2 - Application number: 17/740,538 - Filed: 2022-05-10 - Published: 2022-11-10 - Granted: 2024-02-20 - Earliest claimed: 2021-05-10 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Jun Yoshimura - Web page: https://patentgrep.com/patent/US11908355B2 ## CPC - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - H04N 9/3194: {including sensor feedback} - H04N 9/3182: {Colour adjustment, e.g. white balance, shading or gamut (white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607)} - G09G 2320/0666: for control of colour parameters, e.g. colour temperature - G09G 2354/00: Aspects of interface with display user - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A projection method includes detecting a first section formed of a flat surface at a projection surface, detecting a second section formed of a concave surface at the projection surface, projecting image light in a first visual aspect onto the first section by a projector, and projecting image light in a second visual aspect different from the first visual aspect onto the second section by the projector. ## Claims ### Claim 1 A projection method comprising: detecting a first section formed of a flat surface at a projection surface; detecting a second section formed of a concave surface at the projection surface based at least in part on a radius of a curvature of the second section and a center of the curvature of the second section; projecting image light in a first visual aspect onto the first section by a projector; and projecting image light in a second visual aspect different from the first visual aspect onto the second section by the projector. ### Claim 2 (depends on 1) The projection method according to claim 1, further comprising accepting an input that specifies at least one of the first visual aspect and the second visual aspect. ### Claim 3 (depends on 1) The projection method according to claim 1, further comprising: detecting a third section formed of the concave surface different from the second section at the projection surface; detecting a second distance that is a distance between the projector and the second section; detecting a third distance that is a distance between the projector and the third section; and projecting image light in a third visual aspect onto the third section by the projector, wherein when the second distance differs from the third distance, the second visual aspect is an aspect according to the second distance, and the third visual aspect is an aspect according to the third distance and different from the second visual aspect. ### Claim 4 (depends on 3) The projection method according to claim 3, further comprising: detecting a fourth section formed of the concave surface different from the second section and the third section at the projection surface; detecting a fourth distance that is a distance between the projector and the fourth section; and projecting, by the projector, image light in a fourth visual aspect based on the second visual aspect and the third visual aspect onto the fourth section when the fourth distance is longer than the second distance and shorter than the third distance. ### Claim 5 (depends on 4) The projection method according to claim 4, wherein the second visual aspect is a second color, the third visual aspect is a third color different from the second color, and the fourth visual aspect is an intermediate color between the second color and the third color. ### Claim 6 (depends on 1) The projection method according to claim 1, further comprising: detecting a fifth section formed of the flat surface different from the first section at the projection surface; detecting a first distance that is a distance between the projector and the first section; detecting a fifth distance that is a distance between the projector and the fifth section; and projecting image light in a fifth visual aspect onto the fifth section by the projector, wherein when the first distance differs from the fifth distance, the first visual aspect is an aspect according to the first distance, and the fifth visual aspect is an aspect according to the fifth distance and different from the first visual aspect. ### Claim 7 (depends on 6) The projection method according to claim 6, further comprising: detecting a sixth section formed of the flat surface different from the first section and the fifth section at the projection surface; detecting a sixth distance that is a distance between the projector and the sixth section; and projecting, by the projector, image light in a sixth visual aspect based on the first visual aspect and the fifth visual aspect onto the sixth section when the sixth distance is longer than the first distance and shorter than the fifth distance. ### Claim 8 (depends on 7) The projection method according to claim 7, wherein the first visual aspect is a first color, the fifth visual aspect is fifth color different from the first color, and the sixth visual aspect is an intermediate color between the first color and the fifth color. ### Claim 9 (depends on 1) The projection method according to claim 1, further comprising: detecting a seventh section formed of a convex surface at the projection surface; and projecting image light in a seventh visual aspect different from the first visual aspect and the second visual aspect onto the seventh section by the projector. ### Claim 10 (depends on 9) The projection method according to claim 9, further comprising: detecting an eighth section formed of the convex surface different from the seventh section at the projection surface; detecting a seventh distance that is a distance between the projector and the seventh section; detecting an eighth distance that is a distance between the projector and the eighth section; and projecting image light in an eighth visual aspect onto the eighth section by the projector, wherein when the seventh distance differs from the eighth distance, the seventh visual aspect is an aspect according to the seventh distance, and the eighth visual aspect is an aspect according to the eighth distance and different from the seventh visual aspect. ### Claim 11 (depends on 10) The projection method according to claim 10, further comprising: detecting a ninth section formed of the convex surface different from the seventh section and the eighth section at the projection surface; detecting a ninth distance that is a distance between the projector and the ninth section; and projecting, by the projector, image light in a ninth visual aspect based on the seventh visual aspect and the eighth visual aspect onto the ninth section when the ninth distance is longer than the seventh distance and shorter than the eighth distance. ### Claim 12 (depends on 11) The projection method according to claim 11, wherein the seventh visual aspect is a seventh color, the eighth visual aspect is an eighth color different from the seventh color, and the ninth visual aspect is an intermediate color between the seventh color and the eighth color. ### Claim 13 (depends on 1) The projection method according to claim 1, wherein the first section is an entire flat surface of the projection surface, the first visual aspect is an image representing a first object corresponding to the entire flat surface, the second section is the entire concave surface of the projection surface, and the second visual aspect is an image corresponding to the entire concave surface and representing a second object different from the first object. ### Claim 14 A projector comprising: a light source; a light modulator that modulates light outputted from the light source; a distance sensor; and at least one processor that performs operations comprising: detecting a first section formed of a flat surface at a projection surface using the distance sensor; detecting a second section formed of a concave surface at the projection surface based at least in part on a radius of a curvature of the second section using the distance sensor; projecting image light in a first visual aspect onto the first section using the light source and the light modulator; and projecting image light in a second visual aspect different from the first visual aspect onto the second section using the light source and the light modulator.