# US 12,001,015 B1 · Projection system and contact lens used therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,001,015 B1 - Document ID: US12001015B1 - Status: Granted - Kind: B1 - Application number: 18/150,796 - Filed: 2023-01-06 - Granted: 2024-06-04 - Earliest claimed: 2023-01-06 - Assignees: HTC Corporation - Applicants: HTC Corporation - Inventors: Chun-Yih Wu; Ta-Chun Pu; Yen-Liang Kuo - Web page: https://patentgrep.com/patent/US12001015B1 ## CPC - G02B 27/0081: {with means for altering, e.g. enlarging, the entrance or exit pupil} - G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking} - G02B 27/0172: {characterised by optical features} - G02B 27/0176: {characterised by mechanical features} - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A projection system includes an optical device, a positioning device, and a projector. The optical device has a substrate and at least two positioning components, and the at least two positioning components are respectively disposed on multiple different areas of the substrate. The positioning device performs positioning on the optical device according to the positioning component on the substrate and generates a position signal. The projector projects an image light beam to the optical device, receives the position signal, and determines a projection direction of the image light beam according to the position signal. ## Claims ### Claim 1 A projection system, comprising: an optical device, configured to be disposed on an eye and having a substrate and at least two positioning components, wherein the positioning components are respectively disposed on a plurality of different areas of the substrate; a positioning device, configured to perform a positioning on the optical device according to the positioning components on the substrate and generate a position signal; and a projector, configured to project an image light beam to the optical device, wherein the projector receives the position signal and determines a projection direction of the image light beam according to the position signal, wherein the positioning device comprises a radar, the radar projects a plurality of sensing signals to the at least two positioning components and receives a plurality of reflection signals, and the positioning device obtains the position signal according to the reflection signals. ### Claim 2 (depends on 1) The projection system according to claim 1, wherein the substrate of the optical device is a contact lens, and the at least two positioning components are respectively disposed on at least two different areas around the contact lens. ### Claim 3 (depends on 1) The projection system according to claim 1, wherein a dielectric constant of each of the at least two positioning components is different from a dielectric constant of the substrate. ### Claim 4 (depends on 1) The projection system according to claim 1, wherein sizes of the at least two positioning components are different from each other. ### Claim 5 (depends on 1) The projection system according to claim 1, wherein each of the at least two positioning components contains a metal component. ### Claim 6 (depends on 1) The projection system according to claim 1, wherein the projector comprises: an image light beam adjuster, configured to adjust the projection direction of the image light beam according to the position signal. ### Claim 7 (depends on 6) The projection system according to claim 6, wherein the image light beam adjuster comprises: an optical reflection component, configured to change the projection direction of the image light beam; and an actuator, configured to adjust a light reflection angle of the optical reflection component according to the position signal. ### Claim 8 (depends on 7) The projection system according to claim 7, further comprising: a controller, coupled to the actuator, and configured to drive the actuator according to the position signal to adjust the light reflection angle of the optical reflection component. ### Claim 9 (depends on 1) The projection system according to claim 1, wherein the positioning device generates the position signal according to a signal strength and a signal receiving time of each of the reflection signals. ### Claim 10 (depends on 1) The projection system according to claim 1, wherein the positioning device comprises a camera, the camera captures a captured image of the at least two positioning components, and the positioning device analyzes positions of the at least two positioning components in the captured image to calculate the position signal. ### Claim 11 A contact lens, suitable for a virtual image display system, comprising: a substrate; and N number of positioning components, respectively disposed on a plurality of different areas on the substrate, wherein N is a positive integer greater than or equal to 2, wherein the virtual image display system comprises a radar that projects a plurality of sensing signals to the N number of positioning components and receives a plurality of reflection signals, and the virtual image display system obtains a position information of the N number of positioning components according to the reflection signals. ### Claim 12 (depends on 11) The contact lens according to claim 11, wherein a dielectric constant of each of the N number of positioning components is different from a dielectric constant of the substrate. ### Claim 13 (depends on 11) The contact lens according to claim 11, wherein sizes of the N number of positioning components are different from each other. ### Claim 14 (depends on 11) The contact lens according to claim 11, wherein each of the N number of positioning components contains a metal component. ### Claim 15 (depends on 11) The contact lens according to claim 11, wherein a camera included in the virtual image display system captures a captured image of the N positioning components, and the virtual image display system analyzes positions of the N positioning components in the captured image to calculate a position information.