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公开(公告)号：US20220302361A1
公开(公告)日：2022-09-22
申请号：US17205266
申请日：2021-03-18
发明人： Junjian Zhao , Yu-Huei Lee , Liwei Hou , Zheng Luo , Ze-Qiang Yao , Heng Li , Suwei Wang , Tong Chen
IPC分类号： H01L33/62 , H01L25/16 , H01L23/48 , H01L23/00 , H01L23/498
摘要： A LED driving system for driving a LED matrix. The LED driving system includes an interconnection structure having a first surface and a second surface opposite to the first surface and a plurality of driver dies/chips attached to the first surface of the interconnection structure. The LED matrix is divided into a plurality of sub LED matrix sections that are attached to the second surface of the interconnection structure. The interconnection structure is configured to electrically couple each one of the plurality of sub LED matrix sections to a corresponding one driver die/chip in the plurality of driver dies/chips.
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公开(公告)号：US10342083B1
公开(公告)日：2019-07-02
申请号：US16022642
申请日：2018-06-28
发明人： Zheng Luo , Junjian Zhao , Tong Chen , Yu-Huei Lee
摘要： A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. Each one of the plurality of driving modules can include a local current driver receiving a reference current and providing a driving current to the corresponding one LED, and a local current tuning module receiving a U-bit current tuning command to tune the driving current for the corresponding one LED to reach a desired driving current using the U-bit current tuning command which provides a predetermined number of tuning steps ranging from 0 to 2U.
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3.发明公开公开(公告)号：US20230397311A1
公开(公告)日：2023-12-07
申请号：US18343446
申请日：2023-06-28
发明人： Chia-Lung Ni , Zheng Luo , Yu-Huei Lee , Junjian Zhao
IPC分类号： H05B45/345 , H05B45/46 , H05B45/395
CPC分类号： H05B45/345 , H05B45/46 , H05B45/395
摘要： LED driving circuit includes a first current source, a second current source, a current sensing circuit, and a control circuit. The first current source, coupled in series with a heat dissipation resistor, provides a first current path to the LED string. The second current source, coupled in parallel with the serially coupled first current source and the heat dissipation resistor, provides a second current path to the LED string. The current sensing circuit is configured to sense a current sense signal representing a current flowing through the LED string. The control circuit is configured to control a current distribution of the first current path and a second current path in response to the current sense signal. When the current sense signal is greater than a threshold, a current flowing through the first current path is larger than a current flowing through the second current path.
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公开(公告)号：US11470707B1
公开(公告)日：2022-10-11
申请号：US17330575
申请日：2021-05-26
发明人： Junjian Zhao , Chia-Lung Ni , Zheng Luo , Yu-Huei Lee , Huan Liu
IPC分类号： H05B47/155 , H05B45/35 , F21V23/00 , H05B45/46 , H05B45/32 , H05B45/325 , F21Y115/10
摘要： An LED driving system for synchronizing two LED driving integrated circuits to drive LED strings. The LED driving system sequentially activates the LED strings driven by the first LED driving integrated circuit and then outputs a downstream enabling signal from the first LED driving integrated circuit to the second LED driving integrated circuit to activate the LED strings driven by the second LED driving integrated circuit.
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公开(公告)号：US11191137B1
公开(公告)日：2021-11-30
申请号：US17219267
申请日：2021-03-31
发明人： Junjian Zhao , Chia-Lung Ni , Zheng Luo , Yu-Huei Lee , Huan Liu
摘要： An LED driving system with a master-slave architecture. The LED driving system has at least two LED driving circuits which both have a first status detecting circuit, a second status detecting circuit and a first feedback control circuit. The first status detecting circuit receives a plurality of headroom detecting voltages provided by a plurality of LED strings and generates at least one self-status signal. The second status detecting circuit receives a downstream feedback signal and generates at least one downstream status signal. The first feedback control circuit generates a first feedback control signal based on the at least one self-status signal and the at least one downstream status signal. The second status detecting circuit of one LED driving circuit is coupled to the first feedback control circuit of the other LED driving circuit.
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公开(公告)号：US20240361793A1
公开(公告)日：2024-10-31
申请号：US18648086
申请日：2024-04-26
发明人： Po-Hsien Huang , Bor-Tsang Hwang , Yu-Huei Lee
摘要： A linear regulator includes a pass element, an error amplifier, and a miller compensation circuit. The error amplifier is configured to provide an error signal to the control terminal of the pass element in response to a reference voltage and a feedback voltage. The error amplifier includes a current mirror stage and a first stage. The current mirror stage is configured to receive the input voltage. The first stage is configured to provide a first current signal to a first terminal of the current mirror stage in response to the reference voltage, and provide a second current signal to a second terminal of the current mirror stage in response to the feedback voltage. The miller compensation circuit is coupled between the second terminal of the pass element and the error amplifier. The miller compensation circuit is configured to control the first current signal.
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公开(公告)号：US20240113010A1
公开(公告)日：2024-04-04
申请号：US18470592
申请日：2023-09-20
发明人： Po-Hsien Huang , Yu-Huei Lee , Hsin-Hung Lin , Chun-Yuan Shih , Lien-Chieh Yu
IPC分类号： H01L23/50
CPC分类号： H01L23/50
摘要： A semiconductor device is disclosed herein. The semiconductor device includes a routing structure. The routing structure has an intermediate conductive routing layer. The intermediate conductive routing layer includes a first mesh conductive layer formed in a predetermined second region of the semiconductor device and a second mesh conductive layer formed in a predetermined first region of the semiconductor device. The first mesh conductive layer and the second mesh conductive layer are electrically isolated from each other. The intermediate conductive routing layer further includes multiple first conductive islands formed in the predetermined first region and multiple second conductive islands formed in the predetermined second region.
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公开(公告)号：US11721795B2
公开(公告)日：2023-08-08
申请号：US17205266
申请日：2021-03-18
发明人： Junjian Zhao , Yu-Huei Lee , Liwei Hou , Zheng Luo , Ze-Qiang Yao , Heng Li , Suwei Wang , Tong Chen
IPC分类号： H01L33/62 , H01L23/48 , H01L23/498 , H01L23/00 , H01L25/16
CPC分类号： H01L33/62 , H01L23/481 , H01L23/49822 , H01L24/16 , H01L25/167 , H01L2224/16227
摘要： A LED driving system for driving a LED matrix. The LED driving system includes an interconnection structure having a first surface and a second surface opposite to the first surface and a plurality of driver dies/chips attached to the first surface of the interconnection structure. The LED matrix is divided into a plurality of sub LED matrix sections that are attached to the second surface of the interconnection structure. The interconnection structure is configured to electrically couple each one of the plurality of sub LED matrix sections to a corresponding one driver die/chip in the plurality of driver dies/chips.
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公开(公告)号：US11310879B1
公开(公告)日：2022-04-19
申请号：US17168608
申请日：2021-02-05
发明人： Junjian Zhao , Chia-Lung Ni , Zheng Luo , Yu-Huei Lee , Huan Liu
摘要： A feedback control circuit in an LED driving circuit for driving a plurality of LED strings. Each LED string provides a headroom detecting voltage. The feedback control circuit has a status detecting circuit, a counting circuit and a modulating circuit. The status detecting circuit compares each headroom detecting voltage with a low headroom threshold voltage and a high headroom threshold voltage and generates an up self-status signal and a down self-status signal. The counting circuit counts or keeps unchanged and then generates a counting signal based on the up self-status signal and the down self-status signal. The modulating circuit generates a modulating signal based on the counting signal. And based on the modulating signal, the feedback control circuit generates a feedback control signal to regulate a bias voltage supplying the plurality of LED strings.
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公开(公告)号：US10470264B1
公开(公告)日：2019-11-05
申请号：US16112575
申请日：2018-08-24
发明人： Zheng Luo , Junjian Zhao , Chao Liu , Tong Chen , Yu-Huei Lee
摘要： A smart communication interface for a LED driving system driving a LED matrix having a plurality of LEDs. The smart communication interface may have a data write transaction structure in write mode. The data write transaction structure includes an address code for identifying a corresponding one LED among the plurality of LEDs; an R/W indicating code for indicating whether the smart communication interface is in write mode; and a grayscale command code for indicating a programmed grayscale command value for the corresponding one LED identified by the address code. The smart communication interface may include a data read transaction structure in read mode. The data read transaction structure includes the address code, the R/W indicating code and a grayscale read-back code for indicating a grayscale command value for the corresponding one LED identified by the address code.
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