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公开(公告)号：US20240381003A1
公开(公告)日：2024-11-14
申请号：US18315579
申请日：2023-05-11
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： PAI-HSIANG HSU , CHAO-YU MENG , YUEH-RU LEE
Abstract: An image readout device includes comparator circuits. Each comparator circuit includes an amplifier, an input capacitor, an auto-zero switch, and a control capacitor. The amplifier compares a pixel signal to a reference signal to generate a comparison signal. The input capacitor receives the pixel signal or the reference signal. The auto-zero switch couples or decouples the input node and the output node of the amplifier. The control capacitor receives a respective control signal. Alternatively, the control capacitor can be replaced with a control switch. The control switch is coupled to the auto-zero switch in parallel. The control switch and the control capacitor can be omitted. Instead, the voltage level of the reference signal is adjusted to change the transition time points of the comparison signal.
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公开(公告)号：US12142245B2
公开(公告)日：2024-11-12
申请号：US17945082
申请日：2022-09-14
Applicant: NOVATEK Microelectronics Corp.
Inventor： Che-Wei Yeh , Keko-Chun Liang , Yu-Hsiang Wang , Yong-Ren Fang , Yi-Chuan Liu , Yi-Yang Tsai , Po-Hsiang Fang
Abstract: A control system includes a plurality of driving circuits coupled in series, which include a first driving circuit and a second driving circuit. The first driving circuit includes a first receiver, a first transmitter and a first flag signal selector. The first transmitter is coupled to the first receiver, and the first flag signal selector is coupled between the first receiver and the first transmitter. The second driving circuit, coupled to the first driving circuit, includes a second receiver, a second transmitter and a second flag signal selector. The second transmitter is coupled to the second receiver, and the second flag signal selector is coupled between the second receiver and the second transmitter.
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公开(公告)号：US12142190B1
公开(公告)日：2024-11-12
申请号：US18522263
申请日：2023-11-29
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chieh-An Lin , Chun-Wei Kang , Po-Hsiang Fang , Keko-Chun Liang , Jhih-Siou Cheng , Nien-Tsung Hsueh , Che-Wei Yeh , Yu-Hsiang Wang
Abstract: A display control system for controlling a display panel having a plurality of display zones includes a main controller, a plurality of display driver circuits and a plurality of memories. Each of the display driver circuits is coupled to a corresponding display zone among the plurality of display zones, to control the corresponding display zone. Each of the memories is coupled to a corresponding display driver circuit among the plurality of display driver circuits, to store a compensation data for the corresponding display zone controlled by the corresponding display driver circuit. The plurality of display driver circuits are cascaded through a plurality of first transmission channels and connected through at least one second transmission channel, and each of the first transmission channels is coupled between two of the plurality of display driver circuits or between one of the plurality of display driver circuits and the main controller.
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公开(公告)号：US20240371317A1
公开(公告)日：2024-11-07
申请号：US18311902
申请日：2023-05-04
Applicant: NOVATEK Microelectronics Corp.
Inventor： Ching-Hua LIU , Yen-Tao LIAO
IPC: G09G3/3208 , G06F3/14 , G06T5/00
Abstract: A processor is disposed in a display device and is configured to perform following operations: calculating a total coupling coefficient for a (N−1)th frame according to input data, in which N is a positive integer greater than 1; calculating a coupling coefficient difference value of two adjacent lines for a Nth frame according to the input data; generating a first compensation value for a target sub-pixel according to the coupling coefficient difference value and target input data of the target sub-pixel; generating a second compensation value for the target sub-pixel according to the first compensation value and the total coupling coefficient; generating an output data for the target sub-pixel according to the target input data and the second compensation value; and controlling a display panel in the display device to display a final image according to the output data.
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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
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chien-Hao Li , Jen-Chieh Hu , Syang-Yun Tzeng
IPC: G09G3/20
CPC classification number: G09G3/2088 , G09G2300/0408 , G09G2310/0208 , G09G2310/061 , G09G2310/08 , G09G2340/0435 , G09G2370/08
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20240339064A1
公开(公告)日：2024-10-10
申请号：US18513622
申请日：2023-11-19
Applicant: Novatek Microelectronics Corp.
Inventor： Chan-Yi Lin , Yen-Tao Liao
IPC: G09G3/20
CPC classification number: G09G3/2074 , G09G2320/0223 , G09G2320/0233 , G09G2320/0242 , G09G2320/041
Abstract: 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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17.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
Applicant: NOVATEK Microelectronics Corp.
Inventor： Yu-Yi Chien , Shih-Hsuan Chen , Wen-Lung Hung , Po-Yuan Hsieh
CPC classification number: G06T7/70 , G01J3/506 , G06T5/20 , G06T7/90 , G06T2207/10024 , G06T2207/20081 , G06T2207/20084
Abstract: 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
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Yu-Huang Chen , Feng-Lin Chan
CPC classification number: G06F3/04166 , G06F3/0418 , G06F3/0446
Abstract: 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
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chieh-Ju Tsai , Ching-Jan Chen , Zhen-Guo Ding , Zhe-Hui Lin , Wei-Ling Chen
CPC classification number: H02M3/158 , H02M1/0025 , H02M3/157
Abstract: 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
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chieh-Hsiang Chang
IPC: G09G3/3291
CPC classification number: G09G3/3291 , G09G2310/027 , G09G2310/0291 , G09G2310/0297 , G09G2330/021
Abstract: 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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