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公开(公告)号：US11049441B2
公开(公告)日：2021-06-29
申请号：US16626397
申请日：2018-09-06
发明人： Zheng Luo
IPC分类号： G09G3/32
摘要： Disclosed is an LED display device and a method for driving the same. The LED display device comprises: an LED array comprising LEDs; a row driving module having output terminals, each of which is connected to a corresponding LED row for providing a supply voltage; constant current sources, each of which controls a driving current flowing through a corresponding LED column when a corresponding LED row is powered by the supply voltage; and voltage limiting modules, each of which is connected between a corresponding constant current source and a corresponding LED column. Current paths through a short-circuited LED and an open-circuited LED are disconnected by a corresponding voltage limiting module when there is a short-open failure in the LEDs. The LED display device can be used to improve image quality and reduce power consumption even if there is a short-open failure in the LEDs.
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公开(公告)号：US20200320925A1
公开(公告)日：2020-10-08
申请号：US16626397
申请日：2018-09-06
发明人： Zheng Luo
摘要： Disclosed is an LED display device and a method for driving the same. The LED display device comprises: an LED array comprising LEDs; a row driving module having output terminals, each of which is connected to a corresponding LED row for providing a supply voltage; constant current sources, each of which controls a driving current flowing through a corresponding LED column when a corresponding LED row is powered by the supply voltage; and voltage limiting modules, each of which is connected between a corresponding constant current source and a corresponding LED column. Current paths through a short-circuited LED and an open-circuited LED are disconnected by a corresponding voltage limiting module when there is a short-open failure in the LEDs. The LED display device can be used to improve image quality and reduce power consumption even if there is a short-open failure in the LEDs.
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3.发明公开公开(公告)号：US20240356892A1
公开(公告)日：2024-10-24
申请号：US18497455
申请日：2023-10-30
发明人： Lingjun KONG , Mingxue XU , Yinhua LIU
IPC分类号： H04L61/50
CPC分类号： H04L61/50
摘要： The present disclosure discloses a wired communication system, and a configuration method of a device ID in the wired communication system. The wired communication system includes: one master device, a plurality of slave devices and a plurality of communication lines, wherein, the plurality of communication lines and the plurality of slave devices are connected in parallel through each communication port of each slave device, and the connection mode of each communication port of each slave device is different. The configuration method of a device ID includes: configuring the number of communication lines to be equal to the number of communication ports of each slave device; making each communication port of each slave device and each communication line arranged in different connection mode; and determining an ID of each slave device according to the connection mode between each slave device and each communication line.
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公开(公告)号：US20240087500A1
公开(公告)日：2024-03-14
申请号：US18275472
申请日：2022-03-25
发明人： Zheng Luo , Jiandong Zhao
CPC分类号： G09G3/2096 , G09G3/32 , G09G2330/021
摘要： A display control method for an LED display system, an LED driving circuit and an LED display system are provided. The display control method includes: receiving a data signal that includes at least transmission identification and display data and a clock signal; controlling serial transmission of the clock signal according to the transmission identification in each of a plurality of groups of cascaded LED driving circuits. The disclosure determines transmission identification of a next display cycle according to display data of a current display cycle and display data of the next display cycle, and turn on or off transmission of a clock signal in the current display cycle in accordance with the transmission identification. When the control terminal has a plurality of ports which share the clock signal, the LED driving circuit can turn off modules as many as possible for a black screen, thereby reducing power consumption.
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公开(公告)号：US20240087499A1
公开(公告)日：2024-03-14
申请号：US18263187
申请日：2022-03-25
发明人： Riyi Chen , Liang Wang , Chengyue Jiao
CPC分类号： G09G3/2096 , G09G3/2007 , G09G3/32 , G09G2320/0276
摘要： Disclosed is a display control method of an LED display system comprising a control terminal and a plurality of cascaded LED module groups each of which comprises a plurality of stages of LED modules connected in cascade, wherein the display control method comprises: performing a gamma correction on display data with an initial bit width to obtain gray scale data with a first bit width; compressing the gray scale data to obtain compressed data with a second bit width; sending the compressed data to a corresponding cascaded LED module group. Further disclosed is an LED display system, which can reduce the bit width of the display data transmitted between the control terminal and the plurality of cascaded LED module groups, so as to drive more LED modules under the same bandwidth, and increase the display screen area that can be loaded by communication.
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公开(公告)号：US11967270B2
公开(公告)日：2024-04-23
申请号：US18007767
申请日：2021-04-26
发明人： Lingjun Kong
CPC分类号： G09G3/32 , G09G3/2096 , G09G2310/0264 , G09G2370/00
摘要： Disclosed is a LED display system and a control method thereof. The display system comprises a control card outputting clock signals and data signals; at least one driving circuit group, coupled with the control card, and each including a plurality of cascaded driving circuits, receiving a clock signal and a data signal and transmitting them among the plurality of driving circuits, wherein at least one stage of driving circuit in each driving circuit group comprises an inverter, which inverts the clock signal received by the current stage of driving circuit to obtain an inverted clock signal. The LED display system of the present disclosure can effectively avoid excessive attenuation of the clock signal in the cascaded driving circuits, ensure data sampling correctness based on the clock signal, and ensure display effect of the LED display screen.
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公开(公告)号：US20230230531A1
公开(公告)日：2023-07-20
申请号：US18007767
申请日：2021-04-26
发明人： Lingjun Kong
CPC分类号： G09G3/32 , G09G3/2096 , G09G2310/0264 , G09G2370/00
摘要： Disclosed is a LED display system and a control method thereof. The display system comprises a control card outputting clock signals and data signals; at least one driving circuit group, coupled with the control card, and each including a plurality of cascaded driving circuits, receiving a clock signal and a data signal and transmitting them among the plurality of driving circuits, wherein at least one stage of driving circuit in each driving circuit group comprises an inverter, which inverts the clock signal received by the current stage of driving circuit to obtain an inverted clock signal. The LED display system of the present disclosure can effectively avoid excessive attenuation of the clock signal in the cascaded driving circuits, ensure data sampling correctness based on the clock signal, and ensure display effect of the LED display screen.
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