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：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

IPC: G09G3/32 ,  G09G3/20

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.

公开(公告)号：US11295671B2

公开(公告)日：2022-04-05

申请号：US16827713

申请日：2020-03-24

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Po-Hsiang Fang ,  Chieh-An Lin ,  Keko-Chun Liang ,  Ju-Lin Huang

IPC: G09G3/3258

Abstract: A display driver and a display driving method are provided. The display driving is adapted for driving a display panel and sensing an electrical characteristic of the display panel. The display driver includes a first amplifier circuit. The first amplifier circuit is coupled to the display panel. The first amplifier circuit includes a first driving circuit, a first sensing circuit and a first operational amplifier. The first operational amplifier is coupled to the display panel through a first driving line and a first sensing line. The first driving circuit is configured to provide a first driving signal to the display panel through the first operational amplifier and the first driving line during a driving period. The first sensing circuit is configured to receive a first sensing signal from the display panel through the first operational amplifier and the first sensing line during a first sensing period.

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：US10770011B2

公开(公告)日：2020-09-08

申请号：US15969763

申请日：2018-05-02

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chieh-An Lin ,  Chun-Yung Cho ,  Jhih-Siou Cheng

IPC: G09G3/36

Abstract: A buffer circuit, a display module, and a display driving method are disclosed. The buffer circuit comprises a first polarity buffer, a negative polarity buffer. The first polarity buffer receives a first supply voltage and a second supply voltage to output a first reference voltage to a first resistance string. The second supply voltage is less than the first supply voltage. The negative polarity buffer receives the second supply voltage and a third supply voltage to output a negative reference voltage to a negative resistance string. The third supply voltage is less than the second supply voltage.

公开(公告)号：US20190156754A1

公开(公告)日：2019-05-23

申请号：US16120468

申请日：2018-09-04

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Tzong-Honge Shieh ,  Chieh-An Lin ,  Ju-Lin Huang

IPC: G09G3/3258 ,  G06F3/041 ,  G06F3/044

Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels and a signal convertor. The plurality of sensing channels are configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals. The signal convertor are coupled to the sensing channels and configured to receive the sensing signals from the sensing channels. The signal convertor receives the sensing signals from the sensing channels in different sequences during different sensing periods.

公开(公告)号：US09875707B2

公开(公告)日：2018-01-23

申请号：US14708303

申请日：2015-05-11

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Po-Hsiang Fang ,  Po-Yu Tseng ,  Chieh-An Lin ,  Ju-Lin Huang ,  Yi-Chuan Liu

IPC: G09G3/36

CPC classification number: G09G3/3674 ,  G09G3/3648 ,  G09G2310/0213 ,  G09G2310/067 ,  G09G2320/041 ,  G09G2330/025

Abstract: A display apparatus and a gate driving method thereof are provided. The display apparatus includes a display panel and a gate driver. The display panel has a plurality of gate lines. Output terminals of the gate driver are coupled to the gate lines in a one-to-one manner. The gate driver is configured to drive the gate lines according to a scrambled scan sequence.

公开(公告)号：US09799284B1

公开(公告)日：2017-10-24

申请号：US15675808

申请日：2017-08-14

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chieh-An Lin ,  Pang-Chen Hung

IPC: G09G5/00 ,  G09G3/36

CPC classification number: G09G3/3614 ,  G09G3/3688 ,  G09G2310/0291

Abstract: A driving device includes a first driving circuit, coupled to a first voltage source and a second voltage source having a voltage level lower than the first voltage source, for driving a positive output voltage to a first output end according to a first display voltage and charging the first output end with the second voltage source according to a control signal indicating whether the driving device performs a polarity inversion; and a second driving circuit, coupled to the second voltage source and a third voltage source having a voltage level lower than the second voltage source, for driving a negative output voltage to a second output end according to a second display voltage and discharging the second output end with the second voltage source according to the control signal.

公开(公告)号：US09569989B2

公开(公告)日：2017-02-14

申请号：US13928376

申请日：2013-06-26

Applicant: Novatek Microelectronics Corp.

Inventor： Ju-Lin Huang ,  Jhih-Siou Cheng ,  Chun-Yung Cho ,  Chieh-An Lin

IPC: G09G3/00

CPC classification number: G09G3/00 ,  G09G2300/0838 ,  G09G2300/0871 ,  G09G2310/0213 ,  G09G2310/0289 ,  G09G2330/045

Abstract: A panel driver integrated circuit (IC) and a cooling method of the panel driver IC are provided. The panel driver IC includes a data encoder, a level shifter, a Digital-to-Analog Converter (DAC), a rearrangement circuit and an output buffer. The data encoder receives and selectively changes an original data for outputting to the level shifter. An input terminal and an output terminal of the level shifter are coupled to an output terminal of the data encoder and a data input terminal of the DAC, respectively. The output terminals of the rearrangement circuit are respectively coupled to the reference voltage input terminals of the DAC for providing different reference voltages. The rearrangement circuit correspondingly rearranges the order of the reference voltages according to the operation of the data encoder. An input terminal of the output buffer is coupled to an output terminal of the DAC.

Abstract translation: 提供面板驱动器集成电路（IC）和面板驱动器IC的冷却方法。 面板驱动器IC包括数据编码器，电平转换器，数模转换器（DAC），重排电路和输出缓冲器。 数据编码器接收并选择性地改变用于输出到电平移位器的原始数据。 电平移位器的输入端子和输出端子分别耦合到数据编码器的输出端子和DAC的数据输入端子。 重排电路的输出端分别耦合到DAC的参考电压输入端，以提供不同的参考电压。 重排电路根据数据编码器的操作相应地重新排列参考电压的顺序。 输出缓冲器的输入端耦合到DAC的输出端。

公开(公告)号：US20170018242A1

公开(公告)日：2017-01-19

申请号：US14801855

申请日：2015-07-17

Applicant: Novatek Microelectronics Corp.

Inventor： Chieh-An Lin ,  Jhih-Siou Cheng ,  Po-Hsiang Fang ,  Po-Yu Tseng ,  Ju-Lin Huang ,  Yi-Chuan Liu

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G2310/0251

Abstract: A display apparatus and a driving method of the same are provided. The display apparatus includes a display panel, a gate driver circuit, and a source driver circuit. During a functional sub-period of a frame period, the gate driver circuit simultaneously drives a plurality of gate lines, and the source driver circuit drives a plurality of source lines, so as to perform a function on a plurality of pixels connected to the gate lines. In a scan sub-period of the frame period, the gate driver circuit drives the gate lines according to a scan sequence, and the source driver circuit correspondingly drives the source lines according to the scan sequence of the gate driver circuit in the first scan sub-period, so as to display an image.

Abstract translation: 提供了一种显示装置及其驱动方法。 显示装置包括显示面板，栅极驱动电路和源极驱动电路。 在帧周期的功能子周期期间，栅极驱动器电路同时驱动多条栅极线，并且源极驱动电路驱动多条源极线，以便对连接到栅极的多个像素执行功能 线条。 在帧周期的扫描子周期中，栅极驱动电路根据扫描序列驱动栅极线，并且源极驱动电路根据第一扫描子像素中的栅极驱动电路的扫描顺序相应地驱动源极线 周期，以便显示图像。