公开(公告)号：US20200211488A1

公开(公告)日：2020-07-02

申请号：US16233141

申请日：2018-12-27

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Hsi-Mao Yu ,  Syang-Yun Tzeng

IPC: G09G3/36

Abstract: The present invention discloses a method for a source driver, for preventing image sticking in a display panel coupled to the source driver. The source driver includes a first output driver and a second output driver having different polarities. The first output driver is configured with a first driving capability and the second output driver is configured with a second driving capability. The method includes the steps of: obtaining an effective voltage of a pixel in the display panel; and adjusting the second driving capability of the second output driver to be identical to the first driving capability of the first output driver, to allow the adjusted second driving capability to drive the effective voltage to reach a level having the same magnitude as a level of the effective voltage driven by the first source driver with the same variation of display data.

公开(公告)号：US10971090B2

公开(公告)日：2021-04-06

申请号：US16233141

申请日：2018-12-27

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Hsi-Mao Yu ,  Syang-Yun Tzeng

IPC: G09G3/36

Abstract: The present invention discloses a method for a source driver, for preventing image sticking in a display panel coupled to the source driver. The source driver includes a first output driver and a second output driver having different polarities. The first output driver is configured with a first driving capability and the second output driver is configured with a second driving capability. The method includes the steps of: obtaining an effective voltage of a pixel in the display panel; and adjusting the second driving capability of the second output driver to be identical to the first driving capability of the first output driver, to allow the adjusted second driving capability to drive the effective voltage to reach a level having the same magnitude as a level of the effective voltage driven by the first source driver with the same variation of display data.

公开(公告)号：US10957260B2

公开(公告)日：2021-03-23

申请号：US15657203

申请日：2017-07-23

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Chin-Hung Hsu

IPC: G09G3/34 ,  G09G3/22 ,  G09G3/36

Abstract: A source driver of a display system includes a plurality of channels, and each of the plurality of channels includes a first latch, a second latch, an output driver and a comparator. The first latch receives a first data code and a second data code from a timing controller of the display system. The second latch receives the first data code from the first latch. The output driver is used for transmitting the first data code to a display panel of the display system. The comparator, coupled to the first latch, the second latch and the output driver, is used for comparing the first data code stored in the second latch with the second data code stored in the first latch, to generate a signal indicating a power level for the output driver to transmit the second data code.

公开(公告)号：US11004423B2

公开(公告)日：2021-05-11

申请号：US16845068

申请日：2020-04-10

Applicant: Novatek Microelectronics Corp.

Inventor： Syang-Yun Tzeng ,  Cheng-Kai Kuei ,  Chin-Hung Hsu

IPC: G09G5/00

Abstract: A timing controller and an operation method thereof are provided. The timing controller includes a transmitter circuit and a control circuit. The control circuit ends a normal mode and enter a swing boost mode when quality of data signal is detected to be deteriorated in the normal mode. In the swing boost mode, the control circuit boosts the swing of the data signal to be higher than a normal level of the data signal in the normal mode.

公开(公告)号：US20180374443A1

公开(公告)日：2018-12-27

申请号：US15633732

申请日：2017-06-26

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Sheng-Wen Lai ,  Chin-Hung Hsu

IPC: G09G3/36

CPC classification number: G09G3/3677 ,  G09G3/3611 ,  G09G3/3688 ,  G09G2310/0286 ,  G09G2310/0291 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2330/022 ,  G09G2340/16

Abstract: A method of handling operation of a source driver of a display system used in a timing controller of a display system, which is coupled to the source driver via a data bus for delivering a plurality of line data, includes determining whether a first line data among the plurality of line data is identical to a second line data among the plurality of line data previous to the first line data; and transmitting a sleep command to the source driver when the first line data is determined to be identical to the second line data, wherein the sleep command instructs the source driver to enter a sleep mode; wherein the source driver stops receiving the plurality of line data from the timing controller when the source driver is in the sleep mode.

公开(公告)号：US11210986B1

公开(公告)日：2021-12-28

申请号：US16984137

申请日：2020-08-03

Applicant: Novatek Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Chin-Hung Hsu

IPC: G09G3/20

Abstract: A display driving apparatus with a power control circuit reducing power consumption includes: a shift register receiving a display data signal and outputting a plurality of data signals; a first latch receiving a Nth data signal of the plurality of data signals and outputting a first latched data signal according to a first gate driving signal; an analog signal processing circuit including a second latch coupling to the first latch and outputting a second latched data signal according to a second gate driving signal; a data comparator comparing the first latched data signal and the second latched data signal; and a power controller coupling to the data comparator and controlling a power level of the analog signal processing circuit.

公开(公告)号：US20200243041A1

公开(公告)日：2020-07-30

申请号：US16845068

申请日：2020-04-10

Applicant: Novatek Microelectronics Corp.

Inventor： Syang-Yun Tzeng ,  Cheng-Kai Kuei ,  Chin-Hung Hsu

IPC: G09G5/00

Abstract: A timing controller and an operation method thereof are provided. The timing controller includes a transmitter circuit and a control circuit. The control circuit ends a normal mode and enter a swing boost mode when quality of data signal is detected to be deteriorated in the normal mode. In the swing boost mode, the control circuit boosts the swing of the data signal to be higher than a normal level of the data signal in the normal mode.

公开(公告)号：US10438553B2

公开(公告)日：2019-10-08

申请号：US15633732

申请日：2017-06-26

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Sheng-Wen Lai ,  Chin-Hung Hsu

IPC: G09G3/36

Abstract: A method of handling operation of a source driver of a display system used in a timing controller of a display system, which is coupled to the source driver via a data bus for delivering a plurality of line data, includes determining whether a first line data among the plurality of line data is identical to a second line data among the plurality of line data previous to the first line data; and transmitting a sleep command to the source driver when the first line data is determined to be identical to the second line data, wherein the sleep command instructs the source driver to enter a sleep mode; wherein the source driver stops receiving the plurality of line data from the timing controller when the source driver is in the sleep mode.

公开(公告)号：US20190237041A1

公开(公告)日：2019-08-01

申请号：US16245232

申请日：2019-01-10

Applicant: Novatek Microelectronics Corp.

Inventor： Syang-Yun Tzeng ,  Cheng-Kai Kuei ,  Chin-Hung Hsu

IPC: G09G5/00

CPC classification number: G09G5/008 ,  G09G5/005 ,  G09G2370/08

Abstract: A timing controller and an operation method thereof are provided. The timing controller includes a transmitter circuit and a control circuit. The control circuit ends a normal mode to enter a swing boost mode when a lock signal fed back by a source driving circuit indicates that quality of data signal is deteriorated in the normal mode. In the swing boost mode, the control circuit controls the transmitter circuit to boost the swing of the data signal from a normal level to a high level. The control circuit ends the swing boost mode and enters a clock training mode when the source driving circuit causes loss of lock to the data signal in the swing boost mode. In the clock training mode, the control circuit controls the transmitter circuit to employ a clock training data string as the data signal to transmit to the source driving circuit.

公开(公告)号：US20180374427A1

公开(公告)日：2018-12-27

申请号：US15657203

申请日：2017-07-23

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-Kai Kuei ,  Chin-Hung Hsu

IPC: G09G3/34 ,  G09G3/22

Abstract: A source driver of a display system includes a plurality of channels, and each of the plurality of channels includes a first latch, a second latch, an output driver and a comparator. The first latch receives a first data code and a second data code from a timing controller of the display system. The second latch receives the first data code from the first latch. The output driver is used for transmitting the first data code to a display panel of the display system. The comparator, coupled to the first latch, the second latch and the output driver, is used for comparing the first data code stored in the second latch with the second data code stored in the first latch, to generate a signal indicating a power level for the output driver to transmit the second data code.