# US 12,111,462 B2 · Light display systems and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,462 B2 - Document ID: US12111462B2 - Status: Granted - Kind: B2 - Application number: 17/223,733 - Filed: 2021-04-06 - Published: 2021-11-25 - Granted: 2024-10-08 - Earliest claimed: 2020-05-19 - Assignees: Univeral City Studios LLC - Applicants: Universal City Studios LLC - Inventors: Aaron Jeromin - Web page: https://patentgrep.com/patent/US12111462B2 ## CPC - G02B 27/0081: {with means for altering, e.g. enlarging, the entrance or exit pupil} - G02B 17/02: Catoptric systems, e.g. image erecting and reversing system - G02B 26/0816: {by means of one or more reflecting elements} - G02B 26/0833: {the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD (G02B26/0825 takes precedence; micromechanical devices in general B81B)} - G02B 27/0172: {characterised by optical features} - G02B 27/14: operating by reflection only - G09G 3/02: by tracing or scanning a light beam on a screen - 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 - 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 A light display system may display an image to a user and/or an audience using a persistence of vision effect. In an embodiment, a light display system includes a light source configured to emit a plurality of light patterns that correspond to multiple frames of an image. The light source is configured to sequentially emit the plurality of light patterns based on instructions from a control system such that the multiple frames are presented in a sequence at a first rate. The light display system also includes an image expander configured to reflect the plurality of light patterns toward a user of the head-mounted device, wherein at least a portion of the image expander is configured to rotate relative to the light source at a second rate that is coordinated with the first rate by the control system to thereby display the image for visualization by the user. ## Claims ### Claim 1 A light display system, comprising: a light source configured to emit a plurality of light patterns that correspond to multiple frames of an image, wherein the light source is configured to sequentially emit the plurality of light patterns based on instructions from a control system such that the multiple frames are presented in a sequence at a first rate; and a head-mounted device, comprising a first reflective surface and a second reflective surface, wherein: the second reflective surface is configured to reflect the plurality of light patterns toward the first reflective surface; and the first reflective surface is configured to reflect the plurality of light patterns toward a user of the head-mounted device, wherein the first reflective surface is configured to rotate relative to the light source at a second rate, wherein the first rate and the second rate are timed relative to one another to combine the multiple frames into the image for visualization by the user. ### Claim 2 (depends on 1) The light display system of claim 1, wherein the light source is configured to emit the plurality of light patterns that correspond to all of the multiple frames of the image within one sixteenth of a second. ### Claim 3 (depends on 1) The light display system of claim 1, wherein each frame of the multiple frames of the image corresponds to a single line of pixels associated with the image. ### Claim 4 (depends on 1) The light display system of claim 1, comprising a motor configured to rotate the first reflective surface relative to the light source. ### Claim 5 (depends on 1) The light display system of claim 1, wherein the second reflective surface is fixed relative to a frame of the head-mounted device. ### Claim 6 (depends on 1) The light display system of claim 1, wherein the second reflective surface is a prism. ### Claim 7 (depends on 1) The light display system of claim 1, wherein the first reflective surface is configured to align with and reflect the plurality of light patterns toward a first eye of the user. ### Claim 8 (depends on 7) The light display system of claim 7, wherein the head-mounted device comprises a third reflective surface configured to align with and reflect the plurality of light patterns toward a second eye of the user. ### Claim 9 A light display system, comprising: a light source configured to emit a plurality of light patterns that correspond to multiple frames of an image, wherein the light source is configured to sequentially emit the plurality of light patterns based on instructions from a control system such that the multiple frames are presented in a sequence at a first rate; a prism configured to reflect a first portion of the plurality of light patterns toward a first reflective surface, wherein the first reflective surface is configured to rotate relative to the prism at a second rate, wherein the first rate and the second rate are timed relative to one another to combine the multiple frames into the image for visualization by a user; and a motor configured to be controlled by the control system to drive the first reflective surface to rotate relative to the prism. ### Claim 10 (depends on 9) The light display system of claim 9, comprising a second reflective surface that is configured to rotate relative to the prism at the second rate, wherein the first reflective surface and the second reflective surface are supported within a head-mounted device that is configured to be worn by the user, the first reflective surface is configured to align with and reflect the first portion of the plurality of light patterns toward a first eye of the user, and the second reflective surface is configured to align with and reflect a second portion of the plurality of light patterns toward a second eye of the user. ### Claim 11 (depends on 10) The light display system of claim 10, wherein the prism is configured to reflect the second portion of the plurality of light patterns toward the second reflective surface. ### Claim 12 (depends on 9) The light display system of claim 9, comprising a sensor configured to detect a starting light emitted by the light source, wherein the sensor is configured to transmit a signal to the control system in response to detecting the starting light. ### Claim 13 (depends on 12) The light display system of claim 12, wherein the sensor is configured to sense infrared light, and the light source is configured to emit the starting light as infrared light. ### Claim 14 (depends on 9) The light display system of claim 9, wherein the first reflective surface is a semi-silvered mirror. ### Claim 15 A light display system, comprising: a light source configured to emit a plurality of light patterns that correspond to multiple frames of an image, wherein the light source is configured to sequentially emit the plurality of light patterns for the multiple frames such that the multiple frames are presented in a sequence at a first rate; a reflective surface configured to rotate relative to the light source at a second rate, wherein the first rate and the second rate are timed relative to one another to combine the multiple frames into the image for visualization by a user; a prism configured to reflect a portion of the plurality of light patterns onto the reflective surface; a motor configured to drive the reflective surface to rotate relative to the light source; a sensor configured to detect a starting light and to transmit a first signal in response to detecting the starting light, wherein the first signal is indicative of operation of the light source to emit the plurality of light patterns that correspond to the multiple frames of the image; at least one processor communicatively coupled to the sensor and the motor; and at least one non-transitory computer-readable media communicatively coupled to the at least one processor, the at least one non-transitory computer-readable media storing instructions which, when executed, cause the processor to perform operations comprising: receiving, via the sensor, the first signal; and in response to receiving the first signal, transmitting a second signal to the motor to cause the motor to drive the reflective surface to rotate relative to the light source at the second rate. ### Claim 16 (depends on 15) The light display system of claim 15, wherein the first signal is indicative of the first rate. ### Claim 17 (depends on 15) The light display system of claim 15, wherein the light source is a light bar formed of a plurality of light emitting diodes arranged in a single line. ### Claim 18 (depends on 15) The light display system of claim 15, wherein the reflective surface is supported within a head-mounted device that is configured to be worn by the user. ### Claim 19 (depends on 15) The light display system of claim 15, wherein the light source is configured to emit additional light patterns that correspond to multiple respective frames of a second image, wherein the light source is configured to emit the additional light patterns for the multiple respective frames of the second image such that the multiple respective frames are presented in a respective sequence. ### Claim 20 (depends on 15) The light display system of claim 15, wherein the light source is configured to emit the plurality of light patterns that correspond to the multiple frames of the image in a repetitive manner to thereby repeatedly display the image for visualization by the user.