-
公开(公告)号：US20240348008A1
公开(公告)日：2024-10-17
申请号：US18335937
申请日：2023-06-15
IPC分类号： H01S5/042 , H01S5/02315 , H01S5/0234 , H01S5/183 , H01S5/42 , H05K1/02
CPC分类号： H01S5/04256 , H01S5/02315 , H01S5/0234 , H01S5/18305 , H01S5/423 , H05K1/0218
摘要： In some implementations, a vertical cavity surface emitting laser (VCSEL) device includes a substrate and a plurality of VCSELs on the substrate. The VCSEL device may include an anode layer on the substrate and electrically connected to the plurality of VCSELs. The VCSEL device may include a cathode electrode over at least a portion of one or more VCSELs, of the plurality of VCSELs, and electrically connected to the one or more VCSELs. The VCSEL device may include a ground layer electrically isolated from the at least one anode layer and the cathode electrode by one or more isolation layers, wherein the ground layer is on the anode layer and the cathode electrode, between the anode layer and the cathode electrode, or underneath the anode layer.
-
公开(公告)号：US20220385039A1
公开(公告)日：2022-12-01
申请号：US17445787
申请日：2021-08-24
发明人： Wei SHI , Hao HUANG , Siu Kwan CHEUNG , Huanlin ZHU , Lijun ZHU
IPC分类号： H01S5/183 , G01S7/4865 , G01S17/894 , H01S5/028
摘要： A circuit (e.g., for use in a time-of-flight camera projector module) may include a top metal layer having an anode and a cathode, one or more capacitors connected to the anode, a vertical-cavity surface-emitting laser connected to the anode and the cathode, and a driver connected to the cathode. The circuit may further include a bottom metal layer connected to ground and arranged below the top metal layer, and a dielectric layer separating the top metal layer and the bottom metal layer. In some implementations, the dielectric layer has a thickness under sixty micrometers and a thermal resistance under fifteen degrees Celsius per watt. Accordingly, a current loop flowing vertically across the dielectric layer has a low self-inductance based on the thickness of the dielectric layer and the bottom metal layer is arranged to dissipate heat generated by the current loop flowing vertically across the dielectric layer.
-
公开(公告)号：US20220224074A1
公开(公告)日：2022-07-14
申请号：US17305138
申请日：2021-06-30
发明人： Mikhail DOLGANOV , Hao HUANG , Lijun ZHU
IPC分类号： H01S5/042
摘要： In some implementations, an electrical drive circuit may include a first optical load terminal to receive an anode of a first optical load. The electrical drive circuit may include a junction section that includes a first electrical junction and a second optical load terminal to receive a cathode of the first optical load and an anode of a second optical load. The electrical drive circuit may include a third optical load terminal to receive a cathode of the second optical load; a first switch connected between the third optical load terminal and a common ground; a coupling capacitor connected between the first electrical junction and a second electrical junction; a second switch connected between the second electrical junction and the common ground; and an inductor connected from a second branch of the second electrical junction and between the second electrical junction and the common ground.
-
公开(公告)号：US20220011410A1
公开(公告)日：2022-01-13
申请号：US16948680
申请日：2020-09-29
发明人： Hao HUANG , Mikhail DOLGANOV , Lijun ZHU
IPC分类号： G01S7/4861 , G01S7/4865 , G01S7/486 , G02F1/01
摘要： In some implementations, an electrical drive circuit may generate a rectangular optical pulse using cathode pre-charge and cathode-pull compensation. The electrical drive circuit may include an anode and a cathode to connect an optical load, a switch, a first source connected between the anode and a ground, a rectifier connected between the cathode and the switch, a capacitor connected in parallel with the rectifier, a second source connected to the ground, and an inductor connected between the switch and the second source. In some implementations, when the switch is closed and the optical load is connected, a first current is provided to the optical load through the first source, the rectifier, and the switch, and a second current is provided to the optical load through the first source, the capacitor, and the switch, where a rise time of the first current complements a fall time of the second current.
-
5.发明公开公开(公告)号：US20240036174A1
公开(公告)日：2024-02-01
申请号：US18487541
申请日：2023-10-16
发明人： Hao HUANG , Mikhail DOLGANOV , Lijun ZHU
IPC分类号： G01S7/4861 , G01S7/4865 , G02F1/01 , G01S7/486 , H01S5/042 , H03K3/53
CPC分类号： G01S7/4861 , G01S7/4865 , G02F1/0121 , G01S7/4868 , H01S5/042 , H01S5/0428 , H03K3/53 , G02F2203/26
摘要： In some implementations, an electrical drive circuit may generate a rectangular optical pulse using cathode pre-charge and cathode-pull compensation. The electrical drive circuit may include an anode and a cathode to connect an optical load, a switch, a first source connected between the anode and a ground, a rectifier connected between the cathode and the switch, a capacitor connected in parallel with the rectifier, a second source connected to the ground, and an inductor connected between the switch and the second source. In some implementations, when the switch is closed and the optical load is connected, a first current is provided to the optical load through the first source, the rectifier, and the switch, and a second current is provided to the optical load through the first source, the capacitor, and the switch, where a rise time of the first current complements a fall time of the second current.
-
公开(公告)号：US20240019551A1
公开(公告)日：2024-01-18
申请号：US17938848
申请日：2022-10-07
发明人： James CHEN , Michael MILLER , Eric R. HEGBLOM , Lijun ZHU , Paul COLBOURNE
CPC分类号： G01S7/4817 , G01S17/89 , G01S7/4816 , G01S7/4815
摘要： In some implementations, a light detection and ranging (LIDAR) system includes a vertical cavity surface emitting laser (VCSEL) array including a plurality of VCSELs. The VCSEL array may have a first aspect ratio. The LIDAR system may include a set of transmission optics configured to receive light from the VCSEL array and to illuminate a field of view having a second aspect ratio that is greater than the first aspect ratio. The LIDAR system may include an image sensor array configured for line readout. The image sensor array may have a third aspect ratio that is different from the first aspect ratio. The LIDAR system may include a set of reception optics configured to image light reflected from objects in the field of view, having the second aspect ratio, onto the image sensor array having the third aspect ratio.
-
公开(公告)号：US20230258952A1
公开(公告)日：2023-08-17
申请号：US17937219
申请日：2022-09-30
发明人： Michael MILLER , Vincent V. WONG , Paul COLBOURNE , Lijun ZHU
CPC分类号： G02B27/4205 , G02B27/30 , G01S17/89 , H04N9/31
摘要： An optical device may include emitter array to emit light. The optical device may include a collimating element to create an image of the light emitted by the emitter array. The optical device may include a diffractive optical element (DOE) to generate a pattern from the image of the light. The optical device may include a distortion correction element to reduce distortion in the pattern on a screen or to shape the pattern on the screen.
-
公开(公告)号：US20230238779A1
公开(公告)日：2023-07-27
申请号：US17657517
申请日：2022-03-31
CPC分类号： H01S5/423 , G02B5/1819 , G02B27/30 , G02B27/4233 , H01S5/18311
摘要： In some implementations, an optical device includes a two-zone vertical cavity surface emitting laser (VCSEL) with a set of emission zones configured to emit structured light forming a set of dots; a single-element collimating lens aligned to the two-zone VCSEL; and a tiling diffractive optical element (DOE) aligned to the single-element collimating lens, wherein the tiling DOE comprises a set of tile segments aligned to the set of emission zones, and wherein a tile segment, of the set of tile segments, is configured to project, from the set of emission zones toward portions of a target, the structured light forming the set of dots.
-
公开(公告)号：US20230051475A1
公开(公告)日：2023-02-16
申请号：US17451742
申请日：2021-10-21
发明人： Mikhail DOLGANOV , Lijun ZHU , Sean BURNS , Yuanzhen ZHUANG
摘要： A driver circuit may include an optical emitter, a capacitive element, and an inductive element. The driver circuit may include a first switch that, in a closed state, is to cause charging of the inductive element, and when transitioning from the closed state to an open state is to cause discharging of the inductive element to charge the capacitive element. The driver circuit may include a second switch that in a closed state is to cause discharging of the capacitive element to provide an electrical pulse to the optical emitter. The driver circuit may include a signal generator configured to generate a first signal for controlling the open state and the closed state of the first switch, and a pulse shortening element configured to shorten a pulse width of the first signal to generate a second signal for controlling the open state and the closed state of the second switch.
-
公开(公告)号：US20220385033A1
公开(公告)日：2022-12-01
申请号：US17445786
申请日：2021-08-24
发明人： Wei SHI , Hao HUANG , Siu Kwan CHEUNG , Huanlin ZHU , Lijun ZHU
IPC分类号： H01S5/024 , H01L23/373 , H01L23/498 , H01S5/02315
摘要： A substrate may include a thermally conductive metal core having a top side and a bottom side, a first dielectric coating on the top side of the metal core, a second dielectric coating on the bottom side of the metal core, a first metal circuit layer formed above the first dielectric coating, and a second metal circuit layer formed under the second dielectric coating. In some implementations, the first dielectric coating and the second dielectric coating have thicknesses below sixty micrometers and respective thermal resistances under fifteen degrees Celsius per watt. In some implementations, one or more electrical currents flowing vertically across a dielectric coating have a low parasitic inductance based on the thickness of the dielectric coating, and the metal core may dissipate heat flowing across the dielectric coating and into the metal core.
-
-
-
-
-
-
-
-
-
搜索结果
39 条记录 (耗时 0.018 秒)
