公开(公告)号：US11029564B1

公开(公告)日：2021-06-08

申请号：US16721637

申请日：2019-12-19

申请人： Lumileds LLC

发明人： Mehdi Aas ,  Nicola Bettina Pfeffer ,  Arjen Gerben Van der Sijde ,  Erno Fancsali

IPC分类号： G02F1/13357 ,  F21V8/00 ,  G02F1/1333

摘要： A backlight apparatus can include a light emitting element configured to emit visible light. The backlight apparatus can include a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light. The backlight apparatus can include a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen.

公开(公告)号：US20210151647A1

公开(公告)日：2021-05-20

申请号：US17118345

申请日：2020-12-10

申请人： Lumileds LLC

发明人： Nicola Bettina Pfeffer ,  Arjen Gerben Van der Sijde ,  Marcel Rene Bohmer

IPC分类号： H01L33/58 ,  H01L27/15 ,  H01L33/50 ,  G02F1/01 ,  G02F1/163 ,  H01L25/075 ,  H01L51/52 ,  G02F1/015 ,  F21S41/141 ,  F21S41/40 ,  F21V14/00

摘要： A lighting device comprises a light-emitting module with light-emitting elements, wherein the light-emitting elements are arranged adjacent to each other and are configured to emit light towards a light-emitting side. The light-emitting module is configured such that the light-emitting elements can be addressed partially independently of each other, such that some may be brought into a switched-on state while others are brought into a switched-off state. A top layer is disposed on the light-emitting module at the light-emitting side. Further comprising a switching material capable of a reversible change in transmittance for the light emitted by changing to a higher transmittance in regions where the top layer situated on light-emitting elements in the switched-on state or to a lower transmittance in regions of the top layer situated in the switched-off state. The invention further refers to methods for producing and operating a lighting device and using a lighting device.

公开(公告)号：US10886152B2

公开(公告)日：2021-01-05

申请号：US16868268

申请日：2020-05-06

申请人： Lumileds LLC

发明人： Arjen Gerben Van der Sijde ,  Nicola Bettina Pfeffer ,  Brendan Jude Moran

IPC分类号： H01L21/67 ,  H01L27/15 ,  H01L21/78 ,  H01L23/00 ,  H01L33/38 ,  H01L33/60

摘要： Described herein is a method and system for dual stretching of wafers to create isolated segmented chip scale packages. A wafer having an array of light-emitting diodes (LEDs) is scribed into LED segments, where each LED segment includes a predetermined number of LEDs. The scribed wafer is placed on a stretchable substrate or tape. The tape is stretched and a layer of optically material is placed in the separation gaps. The stretched wafer is scribed on a LED level. The tape is stretched and another layer of optically opaque material is placed in the separation gaps. The same or different optically opaque material can be used for the layers. The two layers of optically opaque material are formed to provide electrical connectivity between the LEDs in each LED segment. In an implementation, each segment or LED is individually addressable.

公开(公告)号：US20200154027A1

公开(公告)日：2020-05-14

申请号：US16597978

申请日：2019-10-10

申请人： Lumileds LLC

发明人： Arjen Gerben Van Der Sijde ,  Nicola Bettina Pfeffer ,  QUINT VAN VOORST VADER ,  Yourii Martynov ,  Charles André Schrama

IPC分类号： H04N5/235 ,  G06T7/586 ,  H04N5/33 ,  G06K9/00 ,  H04N5/225 ,  G06K9/20 ,  G03B15/05

摘要： A method includes capturing a first image of a scene, detecting a face in a section of the scene from the first image, and activating an infrared (IR) light source to selectively illuminate the section of the scene with IR light. The IR light source includes an array of IR light emitting diodes (LEDs). The method includes capturing a second image of the scene under selective IR lighting from the IR light source, detecting the face in the second image, and identifying a person based on the face in the second image.

公开(公告)号：US10321534B1

公开(公告)日：2019-06-11

申请号：US15819413

申请日：2017-11-21

申请人： Lumileds LLC

发明人： Nicola Bettina Pfeffer ,  Arjen Gerben Van Der Sijde ,  Brendan Moran

IPC分类号： H05B33/08 ,  H05B37/02 ,  G03B15/05 ,  H01L27/15 ,  H01L33/50

摘要： 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.