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公开(公告)号：US20230396744A1
公开(公告)日：2023-12-07
申请号：US17834731
申请日：2022-06-07
Applicant: Meta Platforms Technologies, LLC
Inventor： Zhimin Shi , Chloe Astrid Marie Fabien , Wanli Chi
CPC classification number: H04N9/3129 , G02B27/0172 , H04N9/3155 , H04N9/3158 , G02B6/124
Abstract: A display device may include a projector coupled to volume Bragg grating (VBG) based pupil-replicating lightguide. The projector may be a scanning projector or a display panel based projector. A lighting unit for the display panel may have spatially variant spectral composition selected to match angular and wavelength selectivity of the VBGs of the pupil-replicating lightguide, thereby improving light utilization efficiency of the display device. In scanning projector implementations, the center wavelength of the scanned light beam may be varied in coordination with the scanning, to achieve the same effect.
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公开(公告)号：US12125959B2
公开(公告)日：2024-10-22
申请号：US17729484
申请日：2022-04-26
Applicant: Meta Platforms Technologies, LLC
Inventor： Daniel Henry Morris , John Goward , Chloe Astrid Marie Fabien , Michael Grundmann
IPC: H01L25/16 , G02B27/01 , G06F1/16 , G09G3/32 , H01L23/00 , H01L25/075 , H01L27/12 , H01L33/24 , H01L33/46 , H01L33/58 , H01L33/62
CPC classification number: H01L33/62 , G02B27/0172 , G06F1/163 , G09G3/32 , H01L24/08 , H01L24/80 , H01L25/0753 , H01L25/167 , H01L27/1255 , H01L33/24 , H01L33/46 , H01L33/58 , G02B2027/0178 , G09G2310/08 , G09G2320/064 , H01L2224/08145 , H01L2224/80895 , H01L2224/80896 , H01L2933/0033 , H01L2933/0066
Abstract: For small, high-resolution, light-emitting diode (LED) displays, such as for a near-eye display in an artificial-reality headset, LEDs are spaced closely together. A backplane can be used to drive an array of LEDs in an LED display. A plurality of interconnects electrically couple the backplane with the array of LEDs. The backplane can have a different coefficient of thermal expansion (CTE) than the array of LEDs. During bonding of the backplane to the array of LEDs, CTE mismatch can cause misalignment of bonding sites. The higher the bonding temperature, the greater the misalignment of bonding sites. Lower temperature bonding, using materials with lower melting or bonding temperatures, can be used to mitigate misalignment during bonding so that interconnects can be more closely spaced, which can allow LEDs to be more closely spaced, to enable a higher-resolution display.
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公开(公告)号：US11863912B2
公开(公告)日：2024-01-02
申请号：US17834731
申请日：2022-06-07
Applicant: Meta Platforms Technologies, LLC
Inventor： Zhimin Shi , Chloe Astrid Marie Fabien , Wanli Chi
CPC classification number: H04N9/3129 , G02B6/124 , G02B6/125 , G02B6/264 , G02B27/0172
Abstract: A display device may include a projector coupled to volume Bragg grating (VBG) based pupil-replicating lightguide. The projector may be a scanning projector or a display panel based projector. A lighting unit for the display panel may have spatially variant spectral composition selected to match angular and wavelength selectivity of the VBGs of the pupil-replicating lightguide, thereby improving light utilization efficiency of the display device. In scanning projector implementations, the center wavelength of the scanned light beam may be varied in coordination with the scanning, to achieve the same effect.
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公开(公告)号：US11699773B2
公开(公告)日：2023-07-11
申请号：US17729524
申请日：2022-04-26
Applicant: Meta Platforms Technologies, LLC
Inventor： Chloe Astrid Marie Fabien , Michael Grundmann
IPC: H01L33/00 , H01L33/62 , G09G3/32 , H01L25/075
CPC classification number: H01L33/0095 , G09G3/32 , H01L25/0753 , H01L33/62 , H01L2933/0033 , H01L2933/0066
Abstract: Disclosed herein are techniques for forming a thin-film circuit layer on an array of light-emitting diodes (LEDs). LEDs in the array of LEDs can be singulated by various processes, such as etching and ion implantation. Singulating LEDs can be performed before or after forming the thin-film circuit layer on the array of LEDs. The array of LEDs can be bonded to a transparent or non-transparent substrate.
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Patent Agency Ranking
公开(公告)号：US11448906B1
公开(公告)日：2022-09-20
申请号：US16667689
申请日：2019-10-29
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Maxwell Parsons , Chloe Astrid Marie Fabien , Ningfeng Huang , Gareth Valentine , James Ronald Bonar
IPC: G02F1/03 , G02F1/07 , G02B6/122 , F21V9/40 , G09G3/34 , G02F1/01 , G02B6/10 , G02B27/01 , H01L33/50 , G09G3/00 , F21V9/00 , G02F1/13357 , B82Y20/00 , G09G3/32 , F21V8/00 , F21V9/08 , G02F1/1335
Abstract: A color converter device includes an array of color conversion regions. The array of color conversion regions includes color conversion regions of a first type and color conversion regions of a second type that is distinct from the color conversion regions of the first type. A respective color conversion region of the array of color conversion regions includes a respective photonic crystal structure defining a respective two-dimensional pattern. The respective color conversion region includes a respective color conversion matrix. The color conversion regions of the first type converts light of a first color into light of a second color that is distinct from the first color and the color conversion regions of the second type converts the light of the first color into light of a third color that is distinct from the first color and the second color.
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公开(公告)号：US20250079791A1
公开(公告)日：2025-03-06
申请号：US18595109
申请日：2024-03-04
Applicant: Meta Platforms Technologies, LLC
Inventor： Chloe Astrid Marie Fabien , Anurag Tyagi , Julia D'Rozario , Christophe Antoine Hurni , Zhimin Shi , Christopher Pynn
Abstract: An optical element includes an active region overlying a substrate and disposed between an n-type layer and a p-type layer, a plurality of n-type contacts each overlying a respective portion of the n-type layer, and a p-type contact overlying the p-type layer and opposing the plurality of n-type contacts.
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公开(公告)号：US12009465B1
公开(公告)日：2024-06-11
申请号：US17681203
申请日：2022-02-25
Applicant: META PLATFORMS TECHNOLOGIES, LLC
IPC: H01L33/62 , G02B27/01 , H01L25/075 , H01L33/00 , H01L33/58
CPC classification number: H01L33/62 , G02B27/017 , H01L25/0753 , H01L33/0095 , H01L33/58 , G02B2027/0178 , H01L2933/0066
Abstract: In a flip-chip LED assembly having an array of LEDs formed on the same substrate, different LEDs of the array have different distances to the n-contacts of the assembly. This may cause current crowding as current has to spread from the n-contacts through the substrate to each the farthest LEDs of the LED array, requiring LEDs that are farther away to be driven with a higher voltage in order to receive a desired amount of current. To spread current more evenly through the LED assembly and reduce a voltage difference between the closest and farthest LEDs of the array, a current spreading layer having a conductive material (e.g., a conductive oxide) is formed on a surface of the substrate of the LED assembly. The current spreading layer may be a bulk layer or be patterned to increase light extraction from the LEDs of the array.
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公开(公告)号：US11764331B1
公开(公告)日：2023-09-19
申请号：US17466380
申请日：2021-09-03
Applicant: META PLATFORMS TECHNOLOGIES, LLC
CPC classification number: H01L33/382 , G02B27/0176 , H01L25/0753 , H01L33/62 , G02B2027/0178 , H01L2933/0016
Abstract: In a flip-chip LED assembly having an array of LEDs formed on the same substrate, different LEDs of the array have different distances to the n-contacts of the assembly. This may cause current crowding as current has to spread from the n-contacts through the substrate to each the farthest LEDs of the LED array, requiring LEDs that are farther away to be driven with a higher voltage in order to receive a desired amount of current. To spread current more evenly through the LED assembly and reduce a voltage difference between the closest and farthest LEDs of the array, one or more additional n-contacts are formed within the LED array. In some embodiments, the n-contacts may replace a pixel of the LED array. In other embodiments, one or more p-contacts of the LED array are resized or repositioned to accommodate the additional n-contacts without sacrificing pixels of the LED array.
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公开(公告)号：US11835722B2
公开(公告)日：2023-12-05
申请号：US16810458
申请日：2020-03-05
Applicant: META PLATFORMS TECHNOLOGIES, LLC
IPC: G02B27/01 , G02B27/10 , G02B3/08 , G02B5/02 , H04N9/31 , G02B5/18 , G02B5/30 , G02B27/28 , G02F1/1334 , G02F1/137
CPC classification number: G02B27/0172 , G02B3/08 , G02B5/0289 , G02B5/1819 , G02B5/3025 , G02B27/0176 , G02B27/10 , G02B27/106 , G02B27/283 , G02F1/137 , G02F1/1334 , H04N9/3152 , G02B2027/0178 , G02B2027/0187 , G02F1/13345
Abstract: A display device includes an optical assembly and a display that includes a front surface and a back surface. The display is configured to output image light from the front surface and transmit ambient light from the back surface to the front surface. The optical assembly includes a substrate that has a substantially uniform thickness, a beam splitter, and a reflector. The optical assembly is configured to receive the image light output from the front surface of the display and to transmit a portion of the image light at a first non-zero optical power via an optical path that includes reflections at the reflector and at the beam splitter. The optical assembly is also configured to transmit a portion of the ambient light through the optical assembly at a second optical power without reflection at the reflector. The second optical power is less than the first optical power.
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