# US 2019/0356907 A1 · Three-dimensional display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356907 A1 - Document ID: US20190356907A1 - Status: Published application - Kind: A1 - Application number: 16/411,063 - Filed: 2019-05-13 - Published: 2019-11-21 - Earliest claimed: 2018-05-18 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: KATSUJI IGUCHI - Web page: https://patentgrep.com/patent/US20190356907A1 ## CPC - H04N 13/307: using fly-eye lenses, e.g. arrangements of circular lenses - H04N 13/363: using image projection screens (volumetric display H04N13/388) - G02B 17/002: {Arrays of reflective systems} - G02B 30/27: involving lenticular arrays - G02B 30/56: by projecting aerial or floating images - H04N 13/324: Colour aspects - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A three-dimensional display includes a plurality of micro-projectors, each of which including a display element and a projection optic, and a micro-lens array, and each micro-projector projects a display image displayed by the display element onto the micro-lens array through the projection optic and the display element includes a drive circuit substrate and a plurality of micro light emission elements formed on a surface on one side of the drive circuit substrate. ## Claims ### Claim 1 A three-dimensional display comprising: a plurality of micro-projectors; and an optical member, wherein each of the plurality of micro-projectors includes a display element and a projection optic for projecting a display image displayed by the display element toward the optical member, and the display element includes a drive circuit substrate and a plurality of micro light emission elements formed on a surface on one side of the drive circuit substrate. ### Claim 2 (depends on 1) The three-dimensional display according to claim 1, wherein a light convergence portion is provided on at least some of the plurality of micro light emission elements. ### Claim 3 (depends on 1) The three-dimensional display according to claim 1, wherein a plurality of pixel regions in which the plurality of micro light emission elements are disposed are separated from each other by a buffer area that does not emit light. ### Claim 4 (depends on 3) The three-dimensional display according to claim 3, wherein a dummy element that does not emit light is disposed in the buffer area, and the dummy element that is not capable of emitting light has an identical physical structure to the micro light emission elements disposed in the pixel regions. ### Claim 5 (depends on 3) The three-dimensional display according to Claim 3, wherein a micro light emission element having an identical structure to the micro light emission elements disposed in the pixel regions is disposed in the buffer area, and the micro light emission element in the buffer area is controlled no to emit light. ### Claim 6 (depends on 1) The three-dimensional display according to of claim 1, wherein a plurality of pixels forming the display image are disposed in a plurality of pixel regions in which the plurality of micro light emission elements are disposed and each of the pixels includes a red sub-pixel, a blue sub-pixel, and a green sub-pixel, and each of the red sub-pixel, the blue sub-pixel, and the green sub-pixel includes at least one micro light emission element of the micro light emission elements. ### Claim 7 (depends on 6) The three-dimensional display according to claim 6, wherein the at least one micro light emission element included in the blue sub-pixel includes a nitride semiconductor layer, and the blue sub-pixel outputs blue light from the nitride semiconductor layer. 8. The three-dimensional display according to claim 6, wherein the at least one micro light emission element included in the red sub-pixel includes a nitride semiconductor layer, a first wavelength conversion layer is provided on the at least one micro light emission element included in the red sub-pixel, and the red sub-pixel converts blue light from the nitride semiconductor layer into red light by the first wavelength conversion layer and outputs the red light. ### Claim 9 (depends on 6) The three-dimensional display according to claim 6, wherein the at least one micro light emission element included in the green sub-pixel includes a nitride semiconductor layer, a second wavelength conversion layer is provided on the at least one micro light emission element included in the green sub-pixel, and the green sub-pixel converts blue light from the nitride semiconductor layer into green light by the second wavelength conversion layer and outputs the green light. ### Claim 10 (depends on 1) The three-dimensional display according to claim 1, wherein a magnification of the display image by the projection optic of each of the micro-projectors is 1 time or more. ### Claim 11 (depends on 1) The three-dimensional display according to claim 1, wherein an optical aperture of the projection optic is larger than a size of the display image. ### Claim 12 (depends on 1) The three-dimensional display according to claim 1, wherein the optical member is a micro-lens array having a plurality of micro-lenses. ### Claim 13 (depends on 12) The three-dimensional display according to claim 12, wherein an image to be displayed by N (N is a natural number more than 1) pixels in a pixel region which is a region forming the display image of the display element is projected on each of the micro-lenses provided in the micro-lens array, and the micro-lens array has luminance greater than (1000/N) cd/m2. ### Claim 14 (depends on 12) The three-dimensional display according to claim 12, wherein a shielding wall that separates a boundary of the micro-lenses is provided between the micro-lens array and a projection plane formed by the projection optic of each of the plurality of micro-projectors by projecting the display image, and the shielding wall is a material including a light absorbing material. ### Claim 15 (depends on 1) The three-dimensional display according to claim 1, further comprising: a reflective optical element for displaying a three-dimensional image generated by the three-dimensional display in air. ### Claim 16 (depends on 1) The three-dimensional display according to claim 1, wherein each of the plurality of micro-projectors is disposed on a curved substrate, an optical axis of each of the plurality of micro-projectors disposed on the curved substrate is directed to a center of curvature of the curved substrate, and the optical member is a reflective optical element for displaying a three-dimensional image generated by each of the plurality of micro-projectors in air.