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公开(公告)号：US20200225322A1
公开(公告)日：2020-07-16
申请号：US16741129
申请日：2020-01-13
发明人： Erno FANCSALI , Victor ZWANENBERG
IPC分类号： G01S7/484 , H05B45/305 , G01S17/10
摘要： The disclosure relates to a lighting device for frequency-modulated emission. The object to provide a lighting device comprising a light-emitting diode (LED) that allows for higher operating frequencies and that in particular has an improved quality of the emitted light signal is solved in that the lighting device comprises: an LED; a resonant driver circuit with a tuned circuit; wherein the resonant driver circuit is configured to drive the tuned circuit with an operating frequency, and wherein the tuned circuit comprises the LED. The disclosure further relates to a method of operating a lighting device and a use of a lighting device.
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公开(公告)号：US20200217492A1
公开(公告)日：2020-07-09
申请号：US16736346
申请日：2020-01-07
发明人： Manuel GRAVE , Udo KARBOWSKI
摘要： The invention relates to a lighting device comprising at least two light-emitting elements and a method of producing a lighting device. The light-emitting elements are connected with each other into a module via a connection element. The connection element has at least one region spaced apart from the at least two light-emitting elements. At least two modules are connected with each other in parallel. The at least one region of the connection element has a specific electrical resistance that compensate differences between electrical characteristics of at least two light-emitting elements.
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23.发明申请公开(公告)号：US20200212799A1
公开(公告)日：2020-07-02
申请号：US16776016
申请日：2020-01-29
发明人： Zhihua Song
摘要： A device includes a switch, a controller electrically coupled to the switch, an RC circuit, a diode and a zero current detection circuit. The controller is configured to provide a control signal to control the switch to charge and discharge an inductor between a zero current state and a peak current state to provide a light emitting diode (LED) drive current. The RC circuit includes at least a first resistive element, a second resistive element, and a capacitive element. The diode is electrically coupled in parallel with the RC circuit. The zero current detection circuit has a first input electrically coupled to the RC circuit, a second input electrically coupled to a threshold voltage, and an output electrically coupled to the controller.
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公开(公告)号：US20200166646A1
公开(公告)日：2020-05-28
申请号：US16697897
申请日：2019-11-27
摘要： Devices, systems and methods are described. A method includes driving a first light source to generate a visible light pulse having a first intensity for a first duration to illuminate a scene. An image sensor is used to record a visible-spectrum image of the scene illuminated by the first light pulse. A second light source is driven to generate a second light pulse having a second intensity that exceeds the first intensity by at least 100% for a second duration that is at most 10% of the first duration to illuminate the scene during the first duration. An image sensor is used to record a monochrome image of the scene illuminated by the second light pulse. Image processing is performed on a visible-spectrum image and the monochrome image to obtain the digital image of the scene.
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公开(公告)号：US10602074B2
公开(公告)日：2020-03-24
申请号：US15773356
申请日：2016-11-02
摘要： A method according to embodiments of the invention includes creating a three-dimensional profile of a scene, calculating a relative amount of light for each portion of the scene based on the three-dimensional profile, and activating a light source to provide a first amount of light to a first portion of the scene, and a second amount of light to a second portion of the scene. The first amount and the second amount are different. The first amount and the second amount are determined by calculating a relative amount of light for each portion of the scene.
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公开(公告)号：US20200091377A1
公开(公告)日：2020-03-19
申请号：US16133311
申请日：2018-09-17
发明人： Daniel Bernardo Roitman , Sujan-Ehsan Wadud , Michael Laughner , William Collins , Darren Dunphy , Prashant Kumar Singh
IPC分类号： H01L33/44 , H01L33/50 , C09J183/04 , C09J11/04 , C09J5/06 , C23C16/40 , C23C16/455
摘要： Devices and techniques are disclosed herein which include a first LED device layer, a second LED device layer, and an adhesive bondline disposed between the first LED device layer and the second LED device layer. The adhesive bondline includes a bondline thickness, a plurality of spacers disposed within the adhesive bondline, and a silicone matrix. The plurality of spacers may have a diameter or a shortest axis between 0.5 and 10 micrometers and the coefficient of variation is 10% or less. The plurality of spacers may be include SiO2, alumina, soda lime glass, may be inorganic, or polymeric.
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27.发明授权公开(公告)号：US10584847B2
公开(公告)日：2020-03-10
申请号：US16527785
申请日：2019-07-31
发明人： Chunxia Feng
IPC分类号： H01L33/60 , F21V5/04 , H01L33/58 , G02F1/13357 , F21V7/28 , F21V13/04 , F21Y115/10
摘要： Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
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公开(公告)号：US10578278B2
公开(公告)日：2020-03-03
申请号：US15992876
申请日：2018-05-30
发明人： Chunxia Feng
IPC分类号： F21V7/28 , F21V5/04 , F21V3/02 , F21V5/00 , F21V13/04 , G02B19/00 , G02F1/1335 , F21Y115/10
摘要： Optical lens and light emitting device designs achieve uniform light distribution without producing a light “hot spot”, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. The optical lens includes coating portions or structures on the bottom surface thereof, and a backlight device, or other light emitting device, incorporating said lens, to produce a uniform distribution of light at a target surface. The disclosed lens and light emitting device are particularly useful when an extremely wide transfer function of backlight is needed.
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公开(公告)号：US10564345B2
公开(公告)日：2020-02-18
申请号：US16385499
申请日：2019-04-16
IPC分类号： F21V8/00
摘要： An LED backlight system having a plurality of backlight segments including an integral light waveguide, each backlight segment supporting a sidelight emitting LED. A light guide is included in each of the plurality of backlight segments and defines a cavity having a top and sidewalls, with the sidelight emitting LED positioned in the cavity. At least one of a reflective layer and a top out-coupling structure can be positioned between the top of the cavity and the sidelight emitting LED.
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公开(公告)号：US20200027863A1
公开(公告)日：2020-01-23
申请号：US16515810
申请日：2019-07-18
发明人： Christian KLEIJNEN , Frank GUBBELS , Barbara Roswitha MÜLDERS , Georg HENNINGER , Florent MONESTIER
摘要： A method for producing a flexible lighting strip comprising multitude of functional elements, which are light-emitting diodes, comprise light-emitting diodes, or are interposers with light-emitting diodes. The functional elements are in at least two groups, each comprising at least two functional elements in electrical series connection. The groups are in an electrical circuit having at least an anode and a cathode track as outer lines. The functional elements are in an electrical parallel connection to the anode and cathode tracks. The groups are in a longitudinal arrangement so a first group's last functional element is next to a second group's first functional element. Each of the outer lines has a wire line having substantially circular wires that are bent building zones capable of receiving compressive and tensile stress. The electrical circuit provides a third wire line having a substantially circular wire as a center line arranged between the outer lines.
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