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公开(公告)号：WO2023086633A1
公开(公告)日：2023-05-19
申请号：PCT/US2022/049828
申请日：2022-11-14
Applicant: LUMILEDS LLC
Abstract: First and second LED arrays can include respective first and second pluralities of light-emitting areas that are separated by respective first and second boundaries. The first and second boundaries can be arranged in slightly different patterns. At least one lens can collimate light from the first LED array to form first illumination, collimate light from the second LED array to form second illumination, and illuminate the scene with the first and second illuminations. The first boundaries can form first dark bands in the first illumination. The second boundaries can form second dark bands in the second illumination, which can be slightly offset from the first dark bands at the scene.
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公开(公告)号：WO2023081454A1
公开(公告)日：2023-05-11
申请号：PCT/US2022/049111
申请日：2022-11-07
Applicant: LUMILEDS LLC
Abstract: An illumination system can include a dual-junction light-emitting diode (LED) array including first and second junctions that extend in a plane. The first junction can emit first light from a plurality of first light-emitting areas that are separated by first boundaries. The second junction can be disposed on the first junction such that the first light passes through the second junction. The second junction can emit second light from a plurality of second light-emitting areas. The second light-emitting areas can be separated by second boundaries that correspond in a one-to-one correspondence to the first boundaries. The second boundaries can be offset in the plane from the corresponding first boundaries. The offset can help reduce or eliminate dark bands in the combined first and second light, which could be present if the second boundaries were not offset from the first boundaries.
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Patent Agency Ranking
公开(公告)号：WO2023081154A1
公开(公告)日：2023-05-11
申请号：PCT/US2022/048587
申请日：2022-11-01
Applicant: LUMILEDS LLC
Inventor： PFEFFER, Nicola Bettina , VAN DER SIJDE, Arjen Gerben , VAN VOORST VADER, Pieter Johannes Quintus , VAN STEEN, Marcus Hendrikus Adrianus , BONNE, Ronald Johannes
Abstract: A sensor can sense time-varying ambient light that is present in a scene to produce an ambient light signal. A processor can determine an ambient light frequency and an ambient light phase of the ambient light signal. Light-emitting diodes (LEDs) of an LED array can be electrically powered with pulse-width modulation (PWM) electrical signals having a same amplitude to produce illumination. Each LED can illuminate a respective region of the scene. Each PWM electrical signal can have a respective duty cycle that corresponds to a specified illumination intensity in a respective region of the scene. The PWM electrical signals can have a same PWM frequency that is an integral multiple of the ambient light frequency. Each PWM electrical signal can have a respective PWM phase that is synchronized to the ambient light phase. A lens can direct the illumination toward the scene to illuminate the scene.
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公开(公告)号：WO2023064466A1
公开(公告)日：2023-04-20
申请号：PCT/US2022/046562
申请日：2022-10-13
Applicant: LUMILEDS LLC
IPC: H01L33/46 , H01L33/22 , H01L33/32 , H01L25/075 , H01L33/52
Abstract: A structure and method of micro-LEDs are described. The micro-LEDs have a GaN semiconductor structure containing a multi -quantum well active region configured to emit light of a visible wavelength range and a structure to increase specular reflection of ambient light by proving scattering at one or more interfaces of the micro-LEDs. The interfaces include the air-encapsulant interface, semiconductor-encapsulant interface, or semiconductor-contact interface.
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公开(公告)号：WO2019104182A1
公开(公告)日：2019-05-31
申请号：PCT/US2018/062266
申请日：2018-11-21
Applicant: LUMILEDS LLC
Inventor： PFEFFER, Nicola Bettina , VAN DER SIJDE, Arjen Gerben , MORAN, Brendan
CPC classification number: G03B15/05 , H04N5/2256
Abstract: A method of color error correction for a segmented LED array is disclosed. The method includes calculating a target luminance for LED segments in a segmented LED array based on an initial luminance pattern, determining a luminance ratio based on the target luminance, the luminance ratio defined as a ratio of a primary luminance value of the primary LED segment to a secondary luminance value of the at least one adjacent LED segment, and comparing the luminance ratio to a predefined threshold ratio. If the luminance ratio is greater than or equal to the predefined ratio, then the secondary luminance value of the at least one adjacent LED segment is maintained. If the luminance ratio is less than the predefined ratio, then the secondary luminance value of the at least one adjacent LED segment is increased.
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公开(公告)号：WO2023081205A1
公开(公告)日：2023-05-11
申请号：PCT/US2022/048696
申请日：2022-11-02
Applicant: LUMILEDS LLC
Inventor： VAN DER SIJDE, Arjen Gerben , PFEFFER, Nicola Bettina
Abstract: A camera can capture an image of a scene during an exposure duration of the camera. An illumination system for the camera can include a light-emitting diode (LED) array. The LED array can include a plurality of LEDs that can produce light during the exposure duration of the camera. The LED array can include one or more non-emitting areas located between adjacent LEDs in the LED array. A lens can direct the light toward the scene as illumination. The illumination can include one or more dark bands corresponding to the one or more non-emitting areas of the LED array, optionally surrounding the LEDs in the LED array. An actuator can translate at least one of the LED array or the lens during the exposure duration of the camera so as to blur the one or more dark bands in the illumination in the image of the scene.
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公开(公告)号：WO2018106373A1
公开(公告)日：2018-06-14
申请号：PCT/US2017/060215
申请日：2017-11-06
Applicant: LUMILEDS LLC
Abstract: A segmented light or optical power emitting device and an illumination device are described. The segmented device includes a die having a light or optical power emitting semiconductor structure that includes an active layer disposed between an n-layer and a p-layer. Trenches are formed in at least the semiconductor structure and separate the die into individually addressable segments. The active layer emits light or optical power having a first color point or spectrum. At least one wavelength converting layer is adjacent the die and converts the light or optical power to light or optical power having at least one second color point or spectrum and limits an energy ratio of the pump light or optical power that passes through the at least one wavelength converting layer unconverted to total light or optical power emitted by the light or optical power emitting device to less than 10%.
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