公开(公告)号：US20250106961A1

公开(公告)日：2025-03-27

申请号：US18371453

申请日：2023-09-22

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Keko-Chun Liang ,  Chun-Fu Lin ,  Jin-Yi Lin ,  Chieh-An Lin ,  Po-Hsiang Fang

IPC: H05B45/14 ,  H05B45/325

Abstract: According to an embodiment of the invention, a backlight driver of driving a light-emitting diode (LED) string via a driving transistor in a load path is provided. The LED string, the driving transistor, and an electrical load are coupled to form the load path. The backlight driver includes a current regulator and a headroom detection circuit. The current regulator is coupled to the driving transistor and the first terminal of the electrical load to control a driving current flowing through the load path according to at least a feedback voltage from a first terminal of the electrical load. The headroom detection circuit is coupled to the first terminal of the electrical load and a voltage regulator to control the voltage regulator to regulate a supply voltage to a first terminal of the LED string according to at least the feedback voltage.

公开(公告)号：US11276346B2

公开(公告)日：2022-03-15

申请号：US16253171

申请日：2019-01-21

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jin-Yi Lin ,  Chieh-An Lin ,  Jhih-Siou Cheng ,  Ju-Lin Huang

IPC: G09G3/36 ,  G09G3/3225 ,  G11C27/02 ,  H03F3/45 ,  H03K3/356

Abstract: A sensing circuit for an organic light-emitting diode driver includes a sample and hold circuit and a gain amplifier. The sample and hold circuit is configured to sample a sensing signal received via an input terminal. The gain amplifier is coupled to the sample and hold circuit. The sample and hold circuit includes a first capacitor, a second capacitor, a first switch, a second switch, a third switch and a fourth switch. The first capacitor is coupled between the input terminal and the gain amplifier. The second capacitor is coupled between a reference terminal and the gain amplifier. The first switch is connected between the first capacitor and the input terminal. The second switch is connected between the second capacitor and the reference terminal. The third switch is connected between the first capacitor and the gain amplifier. The fourth switch is connected between the second capacitor and the gain amplifier.

公开(公告)号：US12243472B2

公开(公告)日：2025-03-04

申请号：US18365247

申请日：2023-08-04

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Sheng Ma ,  Jhih-Siou Cheng ,  Chun-Fu Lin ,  Jin-Yi Lin

IPC: G09G3/32

Abstract: A light-emitting diode (LED) panel and a driving device therefore is provided. The driving device includes a source driver and a scan driver. The source driver is coupled to a plurality of data lines disposed in the LED panel. The source driver outputs driving currents to the data lines in any one of a plurality of scan line periods, to drive an LED array of the LED panel. The scan driver is coupled to a plurality of scan lines disposed in the LED panel, wherein the scan driver scans the scan lines during the plurality of scan line periods. In an active period of any one of the scan line periods, the scan driver applies an enable voltage to a current scan line among the scan lines, and the scan driver applies a pre-charge voltage to other scan line among the scan lines.

公开(公告)号：US12190793B2

公开(公告)日：2025-01-07

申请号：US18205199

申请日：2023-06-02

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Sheng Ma ,  Jhih-Siou Cheng ,  Chun-Fu Lin ,  Jin-Yi Lin ,  Ju-Lin Huang

IPC: G09G3/32

Abstract: The present disclosure relates to a driver for driving a light emitting unit array of a display device, the driver including: a plurality of driving units, each of the plurality of driving units includes: a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; a charge path circuit configured to be connected in parallel with the driving circuit, and to be turned on during the turn-on period of the channel switch to form a charge path; and a discharge path circuit configured to be connected in parallel with the driving circuit, and to be turned-on after the channel switch is turned off, to form a discharge path.

公开(公告)号：US20210072859A1

公开(公告)日：2021-03-11

申请号：US16784176

申请日：2020-02-06

Applicant: NOVATEK Microelectronics Corp.

Inventor： Keko-Chun Liang ,  Yi-Yang Tsai ,  Jin-Yi Lin ,  Chun-Wei Kang ,  Yi-Chuan Liu

IPC: G06F3/041

Abstract: A driving system for a touch display device includes a timing controller, configured to output a plurality of first data and receive a plurality of second data; and a driving module, coupled to the timing controller, comprises a display driving module, configured to output a plurality of output voltages according to the plurality of first data output by the timing controller; and a sensing module, configured to receive a plurality of display sensing data and a plurality of touch sensing data to generate the plurality of second data to the timing controller.

公开(公告)号：US10777146B2

公开(公告)日：2020-09-15

申请号：US16512414

申请日：2019-07-16

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Hsien Chou ,  Po-Yu Tseng ,  Jhih-Siou Cheng ,  Jin-Yi Lin

IPC: G09G3/3291

Abstract: A source driver including a sensing circuit and an operational amplifier is provided. The sensing circuit senses pixel information of an organic light-emitting diode (OLED) pixel circuit. The operational amplifier includes an amplifier circuit and an offset voltage storing and reducing circuit. An input terminal of the amplifier circuit is coupled to the sensing circuit. The amplifier circuit includes a first gain circuit and a second gain circuit. An output terminal of the offset voltage storing and reducing circuit is coupled to a coupling terminal of the first gain circuit. An input terminal of the offset voltage storing and reducing circuit is coupled to an output terminal of the second gain circuit. The offset voltage storing and reducing circuit stores and reduces an offset voltage of the first gain circuit.

公开(公告)号：US20250007475A1

公开(公告)日：2025-01-02

申请号：US18624110

申请日：2024-04-01

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jui-Chan Chang ,  Jhih-Siou Cheng ,  Ren-Chieh Yang ,  Jin-Yi Lin

IPC: H03F3/45

Abstract: A calibration circuit of a differential difference amplifier (DDA) includes a trimming circuit, a bias generator and a compensation output circuit. The trimming circuit is used to output a trimming code. The bias generator, coupled to the trimming circuit, is used to generate a bias current or voltage according to the trimming code. The compensation output circuit, coupled to the bias generator, is used to receive a data code of the DDA and output the bias current or voltage corresponding to the data code to the DDA.

公开(公告)号：US11978392B1

公开(公告)日：2024-05-07

申请号：US18203652

申请日：2023-05-31

Applicant: NOVATEK Microelectronics Corp.

Inventor： Min-Yang Chiu ,  Yu-Sheng Ma ,  Jin-Yi Lin ,  Hsuan-Yu Chen ,  Jhih-Siou Cheng ,  Chun-Fu Lin

IPC: G09G3/00 ,  G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/0248 ,  G09G2310/0272 ,  G09G2310/0291 ,  G09G2310/08

Abstract: A precharge method for a data driver includes steps of: outputting a display data to a plurality of output terminals of the data driver; outputting a second precharge voltage to an output terminal among the plurality of output terminals prior to outputting the display data to the output terminal, to precharge the output terminal to a voltage level closer to an output voltage; and outputting a first precharge voltage to the output terminal prior to outputting the second precharge voltage. The first precharge voltage provides a faster voltage transition on the output terminal than the second precharge voltage.

公开(公告)号：US20200234636A1

公开(公告)日：2020-07-23

申请号：US16253171

申请日：2019-01-21

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jin-Yi Lin ,  Chieh-An Lin ,  Jhih-Siou Cheng ,  Ju-Lin Huang

IPC: G09G3/3225 ,  G11C27/02 ,  H03F3/45 ,  H03K3/356

Abstract: A sensing circuit for an organic light-emitting diode driver includes a sample and hold circuit and a gain amplifier. The sample and hold circuit is configured to sample a sensing signal received via an input terminal. The gain amplifier is coupled to the sample and hold circuit. The sample and hold circuit includes a first capacitor, a second capacitor, a first switch, a second switch, a third switch and a fourth switch. The first capacitor is coupled between the input terminal and the gain amplifier. The second capacitor is coupled between a reference terminal and the gain amplifier. The first switch is connected between the first capacitor and the input terminal. The second switch is connected between the second capacitor and the reference terminal. The third switch is connected between the first capacitor and the gain amplifier. The fourth switch is connected between the second capacitor and the gain amplifier.

公开(公告)号：US20200020283A1

公开(公告)日：2020-01-16

申请号：US16512414

申请日：2019-07-16

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Hsien Chou ,  Po-Yu Tseng ,  Jhih-Siou Cheng ,  Jin-Yi Lin

IPC: G09G3/3291

Abstract: A source driver including a sensing circuit and an operational amplifier is provided. The sensing circuit senses pixel information of an organic light-emitting diode (OLED) pixel circuit. The operational amplifier includes an amplifier circuit and an offset voltage storing and reducing circuit. An input terminal of the amplifier circuit is coupled to the sensing circuit. The amplifier circuit includes a first gain circuit and a second gain circuit. An output terminal of the offset voltage storing and reducing circuit is coupled to a coupling terminal of the first gain circuit. An input terminal of the offset voltage storing and reducing circuit is coupled to an output terminal of the second gain circuit. The offset voltage storing and reducing circuit stores and reduces an offset voltage of the first gain circuit.