# US 12,181,677 B2 · Near-eye light-filed display system having high efficiency and method of projecting a projection virtual pixel using the near-eye light-filed display system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,677 B2 - Document ID: US12181677B2 - Status: Granted - Kind: B2 - Application number: 18/277,756 - Filed: 2021-02-18 - Published: 2024-04-18 - Granted: 2024-12-31 - Earliest claimed: 2021-02-18 - Assignees: Creal SA - Applicants: Creal SA - Inventors: Tomas Sluka - Web page: https://patentgrep.com/patent/US12181677B2 ## CPC - G02B 27/0172: {characterised by optical features} - G02B 27/0961: {Lens arrays (lens arrays per se G02B3/0006)} - G02B 30/27: involving lenticular arrays - G02B 2027/0112: {comprising device for genereting colour display} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract The present disclosure concerns a near-eye light-field display system comprising an emissive display (1), containing a plurality of display pixels (10, 12), each display pixel (10, 12) having color information and being individually addressable to be set inactive or active where it generate a light beam (111); and a lens array (14) comprising an array including a plurality of lenses (140) and configured to project the light beams (111) of the active display pixels (10, 12) to form a projection virtual pixel image (26). The projection pixel image (26) having color information and a position in space that are determined by the number of the active display pixels (10, 12) and their position on the emissive display (1). The present disclosure further concerns a method of projecting a projection virtual pixel using the near-eye light-field display system. ## Claims ### Claim 1 Near-eye light-field display system comprising: an emissive display comprising a plurality of display pixels, each display pixel having color information and being individually addressable to be set inactive or active such as to generate a light beam towards a pupil plane; and a lens array positioned between the emissive display and the pupil plane, the lens array comprising an array including a plurality of lenses and being configured to project the light beam generated by the active display pixels to form a projection virtual pixel image; wherein the color information of the projection pixel image and the position in space of the projection pixel image is determined by the number of the active display pixels and their position on the emissive display; and wherein the color information of the projection pixel image is the sum of the color information of the active display pixels. ### Claim 2 (depends on 1) Near-eye light-field display system according to claim 1, wherein the lens array comprises a matrix array containing between 25 lenses and 64 lenses. ### Claim 3 (depends on 2) Near-eye light-field display system according to claim 2, wherein the lenses has a size between 1 to 5 mm. ### Claim 4 (depends on 1) Near-eye light-field display system according to claim 1, wherein the display pixels have a color depth of 1 bit color or 2 bit color. ### Claim 5 (depends on 1) Near-eye light-field display system according to claim 1, comprising an imaging optical element configured to project the light beams to an image plane. ### Claim 6 (depends on 5) Near-eye light-field display system according to claim 5, further comprising projection optics configured to project the light beams such as to define an eye-box at the pupil plane. ### Claim 7 (depends on 1) Near-eye light-field display system according to claim 1, wherein the emissive display comprises a drive circuit configured to control the plurality of display pixels such as to set each display pixel active or inactive. ### Claim 8 A wearable device for virtual reality or augmented reality applications, comprising a near-eye light-field display system comprising: an emissive display comprising a plurality of display pixels, each display pixel having color information and being individually addressable to be set inactive or active such as to generate a light beam towards a pupil plane; and a lens array positioned between the emissive display and the pupil plane, the lens array comprising an array including a plurality of lenses and being configured to project the light beam generated by the active display pixels to form a projection virtual pixel image; wherein the color information of the projection pixel image and the position in space of the projection pixel image are determined by the number of the active display pixels and their position on the emissive display; and wherein the color information of the projection pixel image is the sum of the color information of the active display pixels. ### Claim 9 (depends on 8) The wearable device according to claim 8, comprising virtual reality or augmented reality glasses. ### Claim 10 Method of projecting a projection virtual pixel using a near-eye light-field display system comprising an emissive display comprising a plurality of display pixels, each display pixel having color information and being individually addressable to be set inactive or active such as to generate a light beam towards a pupil plane; and a lens array positioned between the emissive display and the pupil plane, the lens array comprising an array including a plurality of lenses and being configured to project the light beam generated by the active display pixels to form a projection virtual pixel image; wherein the color information of the projection pixel mage and the position in space of the projection pixel image are determined by the number of the active display pixels and their position on the emissive display; and wherein the color information of the projection pixel image is the sum of the color information of the active display pixels; the method comprising: providing a vector data corresponding to the color information of the projection virtual pixel and the position of the projection pixel image relative to the pupil plane; addressing the emissive display with the vector data, such as to select a subset of display pixels of the emissive display; and setting active the selected subset of display pixels such that each display pixel in the selected subset of display pixels generates a light beam; wherein the color information of the projection pixel image is the sum of the color information of the active display pixels of the subset. ### Claim 11 (depends on 10) The method according to claim 10, wherein the vector data comprises a color model and a coordinate set. ### Claim 12 (depends on 11) The method according to claim 11, wherein the color model comprises a three-byte hexadecimal number representing red, green, and blue components of the color. ### Claim 13 (depends on 11) The method according to claim 11, wherein the coordinate set comprises Cartesian x, y, z coordinates. ### Claim 14 (depends on 10) The method according to claim 10, wherein the vector data is used to calculate two-dimensional coordinates on the emissive display corresponding to the selected subset of display pixels. ### Claim 15 (depends on 10) The method according to claim 10, wherein the emissive display comprises a drive circuit configured to control the plurality of display pixels such as to set each display pixel active or inactive; and wherein the method comprises providing the vector data to the drive circuit. ### Claim 16 (depends on 10) Computer program comprising instructions which, when executed by a device having processing capability, is adapted to carry out the method according to claim 10.