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公开(公告)号：US20240339066A1
公开(公告)日：2024-10-10
申请号：US18744691
申请日：2024-06-16
发明人： Chien-Hao Li , Jen-Chieh Hu , Syang-Yun Tzeng
IPC分类号： G09G3/20
CPC分类号： G09G3/2088 , G09G2300/0408 , G09G2310/0208 , G09G2310/061 , G09G2310/08 , G09G2340/0435 , G09G2370/08
摘要： A display device includes a timing controller, a transmission line, and a source driver coupled to the timing controller via the transmission line. The source driver monitors a data rate of a pixel packet in an active area of a frame, synchronizes a clock according to the data rate to generate a synchronized clock, and clocks data in the pixel packet using the synchronized clock.
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公开(公告)号：US20240339064A1
公开(公告)日：2024-10-10
申请号：US18513622
申请日：2023-11-19
发明人： Chan-Yi Lin , Yen-Tao Liao
IPC分类号： G09G3/20
CPC分类号： G09G3/2074 , G09G2320/0223 , G09G2320/0233 , G09G2320/0242 , G09G2320/041
摘要： The invention provides a display device and a grayscale compensation method thereof. The display device includes a data conversion circuit, a voltage drop estimation circuit, and a compensation circuit. The data conversion circuit converts a plurality of original grayscale data of a target pixel block into current data. The voltage drop estimation circuit converts the current data into transmission line voltage drop information of the target pixel block. The compensation circuit converts the transmission line voltage drop information into at least one pixel compensation value of the target pixel block and compensates the original grayscale data of the target pixel block using the at least one pixel compensation value to generate a plurality of compensated grayscale data of the target pixel block.
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3.发明公开公开(公告)号：US20240331185A1
公开(公告)日：2024-10-03
申请号：US18129089
申请日：2023-03-31
发明人： Yu-Yi Chien , Shih-Hsuan Chen , Wen-Lung Hung , Po-Yuan Hsieh
CPC分类号： G06T7/70 , G01J3/506 , G06T5/20 , G06T7/90 , G06T2207/10024 , G06T2207/20081 , G06T2207/20084
摘要： A method of obtaining brightness information of a display panel having a plurality of pixels includes steps of: obtaining positioning information indicating positions of the plurality of pixels on a test picture; lighting up the plurality of pixels and capturing the test picture; measuring the plurality of pixels according to the positioning information, to obtain a light intensity distribution of each of the plurality of pixels in the test picture; and calculating the brightness information of each of the plurality of pixels according to the light intensity distribution.
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公开(公告)号：US12105910B2
公开(公告)日：2024-10-01
申请号：US18122540
申请日：2023-03-16
发明人： Yu-Huang Chen , Feng-Lin Chan
CPC分类号： G06F3/04166 , G06F3/0418 , G06F3/0446
摘要： A touch sensing method for a touch panel and an electronic device are provided. The touch panel includes touch sensing units. The touch sensing method includes: in a first sensing period, applying touch excitation signals to a first group of the touch sensing units to obtain first touch sensing signals; applying touch reference signals to a second group of the touch sensing units to obtain a first reference sensing signal; in a second sensing period, applying the touch excitation signals to the second group of the touch sensing units to obtain second touch sensing signals; applying the touch reference signal to the first group of the touch sensing units to obtain a second reference sensing signal; and acquiring capacitance values of the touch sensing units according to the first touch sensing signals, the first reference sensing signal, the second touch sensing signals, and the second reference sensing signal.
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公开(公告)号：US12088198B2
公开(公告)日：2024-09-10
申请号：US17646481
申请日：2021-12-30
发明人： Chieh-Ju Tsai , Ching-Jan Chen , Zhen-Guo Ding , Zhe-Hui Lin , Wei-Ling Chen
CPC分类号： H02M3/158 , H02M1/0025 , H02M3/157
摘要： A power stage circuit generates an output signal according to an input signal and a control signal. A ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. A calculation circuit generates a calculation signal according to the output signal and a reference signal. The calculation circuit operates in a first mode when the power converter operates in a light loading state, and the calculation circuit operates in a second mode when the power converter operates in a normal state. A control circuit generates the control signal according to the calculation signal and the ramp signal. The control circuit includes a comparator circuit and a control signal generator. The comparator circuit generates a comparison signal according to the calculation signal and the ramp signal. The control signal generator generates the control signal according to the comparison signal.
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公开(公告)号：US12087239B2
公开(公告)日：2024-09-10
申请号：US18197111
申请日：2023-05-15
发明人： Chieh-Hsiang Chang
IPC分类号： G09G3/3291
CPC分类号： G09G3/3291 , G09G2310/027 , G09G2310/0291 , G09G2310/0297 , G09G2330/021
摘要： A display driver circuit is configured to drive a display panel having a multiplexer. A method for the display driver circuit includes steps of: sending, by the display driver circuit, a plurality of first data voltages to the display panel through a switch of the multiplexer; and outputting, by the display driver circuit, a control signal to the switch during a first period in which the plurality of first data voltages sent through the switch remain unchanged, wherein the control signal controls the switch to be turned on and keep in a conducted status until the display driver circuit sends a second data voltage different from the plurality of unchanged first data voltages through the switch.
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公开(公告)号：US12062329B2
公开(公告)日：2024-08-13
申请号：US18139682
申请日：2023-04-26
发明人： Yu-Sheng Ma , Jhih-Siou Cheng , Chun-Fu Lin
IPC分类号： G09G3/32
CPC分类号： G09G3/32 , G09G2300/06 , G09G2310/0202 , G09G2310/0272 , G09G2320/0233 , G09G2330/025
摘要： A source driver and a driving system for driving an LED panel, and an LED display system are provided. The driving system includes: a plurality of source drivers, for respectively supplying driving currents to channels of different portions on the LED panel, and each source driver includes: a plurality of driving circuits, which are in one-to-one correspondence with the plurality of channels on the LED panel, and are connected to a same current control line, each driving circuit being configured to supply a driving current to a corresponding channel, wherein, the supplied driving current is associated with a voltage on the current control line which the driving circuit is connected with. When one or more driving circuits switch between a non-driving state and a driving state, the driving current being supplied by the driving circuit(s) being in the driving state in the plurality of source drivers is compensated.
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公开(公告)号：US20240223161A1
公开(公告)日：2024-07-04
申请号：US18091381
申请日：2022-12-30
发明人： Chih-Yuan Chang , Yu-Te Liao , Wei Cheng Liu
摘要： Pseudo resistor having an auto-tune function automatically calibrates resistance of the pseudo resistor and compensates for DC drift based on an output signal of an electrical circuit to which the pseudo resistor is coupled, as to mitigate signal phenomenon in the output signal caused by PVT variation. The pseudo resistor includes first transistor, second transistor, and adder. The first terminal of the second transistor is coupled to the first terminal of the first transistor and forms a first common node. The control terminal of the first transistor is coupled to the control terminal of the second transistor and forms second common node. The adder is coupled between the first and second common nodes and configured to receive adjustment voltage for generating a bias voltage for controlling the first and second transistors, where the adjustment voltage corresponds to the output signal coupled to the second terminal of the second transistor.
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公开(公告)号：US12014564B2
公开(公告)日：2024-06-18
申请号：US17407133
申请日：2021-08-19
发明人： Wei-Lun Shih , Wu Wei Lin , Kuei Jung Chen
CPC分类号： G06V40/13 , G06F3/0412 , G09G3/36 , G09G2300/0408 , G09G2310/0286
摘要： An electronic circuit adapted to control an operation of a gate driver circuit is provided. The electronic circuit includes a gate control circuit. The gate control circuit outputs control signals to the gate driver circuit in a display period and a fingerprint sensing period via the same output nodes. The control signals include a start pulse signal and a switch control signal. The switch control signal controls the gate driver circuit to operate in the display period or the fingerprint sensing period. The gate driver circuit includes a plurality of shift register groups and a switch circuit. The shift register groups output scan signals according to the start pulse signal. The switch circuit receives and outputs the scan signals to display scan lines in the display period and outputs the scan signals to fingerprint scan lines in the fingerprint sensing period according to the switch control signal.
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10.发明公开公开(公告)号：US20240161672A1
公开(公告)日：2024-05-16
申请号：US18421930
申请日：2024-01-24
CPC分类号： G09G3/20 , G06F3/0412 , G06V40/13 , G06V40/1318 , G09G2310/0272
摘要： An electronic circuit including a plurality of common terminals, a first circuit, a second circuit, and a plurality of switch units is provided. The first circuit is configured to output display driving signals to data lines of a display panel via the common terminals. The second circuit is configured to receive fingerprint sensing signals from fingerprint sensing lines of the display panel via the common terminals. Each of the switch units includes a first terminal coupled to one of the common terminals and a plurality of second terminals coupled to the first circuit and the second circuit. The switch units are grouped into a plurality of groups, and each group corresponds to a fingerprint sensing channel of the second circuit.
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