公开(公告)号：US09142169B2

公开(公告)日：2015-09-22

申请号：US13736091

申请日：2013-01-08

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Ju-Lin Huang ,  Pang-Chan Hung

IPC: G09G3/36

CPC classification number: G09G3/36 ,  G09G3/3685 ,  G09G2310/027

Abstract: A digital to analog converter for a source driver chip of a liquid crystal display device is disclosed. The digital to analog converter comprises an output terminal for outputting an output voltage, a plurality of receiving terminals for receiving a plurality of Gamma voltages, and a plurality of transmission paths comprising a plurality of first-type transistors coupled between the plurality of receiving terminals and the output terminal, respectively, for outputting one of the plurality of Gamma voltages as the output voltage according to a digital select signal; wherein a first transmission path corresponding to a first receiving terminal receiving a first Gamma voltage closest to a middle voltage among the plurality of Gamma voltages has lower on-resistance than other transmission paths among the plurality of transmission paths when a same source-to-gate voltage is applied.

Abstract translation: 公开了一种用于液晶显示装置的源极驱动器芯片的数模转换器。 数模转换器包括用于输出输出电压的输出端子，用于接收多个伽马电压的多个接收端子以及耦合在多个接收端子之间的多个第一型晶体管的多个传输路径，以及多个传输路径 输出端子，用于根据数字选择信号输出多个伽马电压中的一个作为输出电压; 其中对应于接收第一接收端的第一传输路径，当多个伽马电压中的最接近中间电压的第一伽马电压具有相同的源极到栅极之间的多个传输路径中的其它传输路径的导通电阻较低 施加电压。

公开(公告)号：US08912828B2

公开(公告)日：2014-12-16

申请号：US13794811

申请日：2013-03-12

Applicant: Novatek Microelectronics Corp.

Inventor： Ju-Lin Huang ,  Yueh-Hsiu Liu

IPC: H03B1/00 ,  H05B37/02 ,  G09G3/20

CPC classification number: H05B37/02 ,  G09G3/20 ,  G09G2310/0291 ,  G09G2330/021 ,  G09G2330/045

Abstract: A driving circuit of flat display including a charging circuit path, a discharging circuit path, and a detecting circuit is provided. The charging circuit path has first and second impedance states, wherein an impedance value of the first impedance state is smaller than that of the second impedance state. The discharging circuit path has third and fourth impedance states, wherein an impedance value of the third impedance state is smaller than that of the fourth impedance state. The detecting circuit detects whether the charging circuit path or the discharging circuit path is in an unstable first state or stable second state, controls the charging circuit path to the first impedance state or the discharging circuit path to the third impedance state in the first state, and controls the charging circuit path to the second impedance state or the discharging circuit path to the fourth impedance state in the second state.

Abstract translation: 提供了包括充电电路路径，放电电路路径和检测电路的平面显示器的驱动电路。 充电电路具有第一和第二阻抗状态，其中第一阻抗状态的阻抗值小于第二阻抗状态的阻抗值。 放电电路具有第三和第四阻抗状态，其中第三阻抗状态的阻抗值小于第四阻抗状态的阻抗值。 检测电路检测充电电路路径或放电电路路径是否处于不稳定的第一状态或稳定的第二状态，在第一状态下将充电电路路径控制为第一阻抗状态或放电电路路径至第三阻抗状态， 并且在第二状态下将充电电路路径控制到第二阻抗状态或放电电路路径到第四阻抗状态。

公开(公告)号：US20140139364A1

公开(公告)日：2014-05-22

申请号：US13925849

申请日：2013-06-25

Applicant: Novatek Microelectronics Corp.

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

IPC: H03M1/66

CPC classification number: H03M1/06 ,  G09G3/20 ,  G09G2300/0421 ,  G09G2310/027 ,  G09G2310/0275 ,  G09G2320/0276 ,  H03M1/66 ,  H03M1/765

Abstract: A driving circuit includes a plurality of reference voltage lines and a digital to analog converter. The reference voltage lines are configured for respectively transmitting different grayscale reference voltages, in which the grayscale reference voltages are divided into at least two groups, and the wire diameter/wire width of at least one reference voltage line among the reference voltage lines of a first voltage group among the at least two groups is different from the wire diameters/wire widths of the reference voltage lines of a second voltage group among the at least two groups. The digital to analog converter is coupled to the reference voltage lines to receive the grayscale reference voltages and is for converting a digital signal into a grayscale voltage according to the grayscale reference voltages.

Abstract translation: 驱动电路包括多个参考电压线和数模转换器。 参考电压线被配置为分别传输不同的灰度参考电压，其中灰度参考电压被划分为至少两组，并且第一个参考电压的参考电压线中的至少一个参考电压线的线径/线宽 所述至少两组中的电压组与所述至少两组中的第二电压组的参考电压线的线径/线宽不同。 数模转换器耦合到参考电压线以接收灰度参考电压，并且用于根据灰度参考电压将数字信号转换成灰度级电压。

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：US11854471B2

公开(公告)日：2023-12-26

申请号：US18075179

申请日：2022-12-05

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hsu-Chih Wei ,  Po-Hsiang Fang ,  Keko-Chun Liang ,  Che-Wei Yeh ,  Ju-Lin Huang

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2330/023 ,  G09G2370/00

Abstract: The present disclosure provides a method for a display driver system and a display driver system. The method comprises: the control circuit transmitting a global signal and a first signal for a LED driver circuit in each stage to a first-stage LED driver circuit, wherein the global signal includes an command for indicating an operation mode of the LED driver circuit in each stage; the LED driver circuit in each stage determining the operation mode corresponding to the command according to the global signal, identifying a corresponding first signal of the LED driver circuit in the stage, and operating according to the determined operation mode and the corresponding first signal; and the LED driver circuit in each stage except for last stage transmitting the global signal to the LED driver circuit in its next stage, and in response to a completion of operation according to the determined operation mode and the corresponding first signal, transmitting the first signal for the LED driver circuit in each of sequential stages to the LED driver circuit in its next stage.

公开(公告)号：US11651729B2

公开(公告)日：2023-05-16

申请号：US17881404

申请日：2022-08-04

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Jhih-Siou Cheng ,  Chun-Fu Lin ,  Po-Hsiang Fang ,  Ju-Lin Huang

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/0286 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/064

Abstract: The present disclosure relates to a driving method for a display device and a display device. The display device includes a display driver, the display driver includes a plurality of driving channels each of which drives corresponding display unit according to display data in a pulse width modulation manner within one frame period, the method comprises: selectively enabling, in each sub-frame subset among a plurality of different sub-frame subsets of the frame period, different channel subset among a plurality of channel subsets of the plurality of driving channels to drive corresponding display unit, wherein each channel subset of the plurality of channel subsets includes two or more driving channels among the plurality of driving channels.

公开(公告)号：US11423831B2

公开(公告)日：2022-08-23

申请号：US17390394

申请日：2021-07-30

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Jhih-Siou Cheng ,  Chun-Fu Lin ,  Po-Hsiang Fang ,  Ju-Lin Huang

IPC: G09G3/32

Abstract: The present disclosure relates to a driving method for a display device and a display device. The display device includes a display driver, the display driver includes a plurality of driving channels each of which drives corresponding display unit according to display data in a pulse width modulation manner within one frame period, the method comprises: selectively enabling, in each sub-frame subset among a plurality of different sub-frame subsets of the frame period, different channel subset among a plurality of channel subsets of the plurality of driving channels to drive corresponding display unit, wherein each channel subset of the plurality of channel subsets includes two or more driving channels among the plurality of driving channels.

公开(公告)号：US11386836B1

公开(公告)日：2022-07-12

申请号：US17372545

申请日：2021-07-12

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Ju-Lin Huang

IPC: G09G3/32 ,  H03F3/16

Abstract: An amplifier for driving a display panel includes an input stage, a gain stage and an output stage. The gain stage is coupled to the input stage. The output stage, coupled to the gain stage, includes a first output driving circuit and a second output driving circuit. The first output driving circuit is operated in a first voltage domain. The second output driving circuit is operated in a second voltage domain different from the first voltage domain.

公开(公告)号：US11290061B2

公开(公告)日：2022-03-29

申请号：US16929124

申请日：2020-07-15

Applicant: Novatek Microelectronics Corp.

Inventor： Chia-Wei Su ,  Ju-Lin Huang ,  Keko-Chun Liang

IPC: H03F1/08 ,  H03F1/52 ,  H03F3/30 ,  H03F3/45

Abstract: An amplifier circuit including an input amplifier, an output amplifier and a diode device is provided. The output amplifier includes a PMOSFET and an NMOSFET. The PMOSFET has a gate electrode serving as a first input end and a drain coupled to an output end. The NMOSFET has a gate electrode serving as a second input end and a drain coupled to the output end. The output amplifier outputs an output voltage at the output end, and is coupled to the input amplifier via at least one of the first and second input ends. The diode device is coupled between the output end and the at least one of the first and second input ends of the output amplifier. When a voltage difference between the output end and the at least one of the first and second input ends of the output amplifier is greater than a barrier voltage of the diode device, the diode device is turned on, and an overshoot of the output voltage is reduced.

公开(公告)号：US11288989B2

公开(公告)日：2022-03-29

申请号：US16867483

申请日：2020-05-05

Applicant: Novatek Microelectronics Corp.

Inventor： Yi-Yang Tsai ,  Po-Hsiang Fang ,  Jhih-Siou Cheng ,  Ju-Lin Huang

IPC: G09G3/00 ,  G09G3/3291

Abstract: A source driver and a calibration method thereof are provided. The source driver for driving and sensing a display panel of the disclosure includes a sensing circuit, an analog-to-digital converter circuit and a digital arithmetic circuit. The sensing circuit is configured to receive a reference signal through a sensing channel when the source driver is operated in a calibration mode. The analog-to-digital converter circuit is coupled to the sensing circuit, and configured to convert the reference signal to a digital reference signal. The digital arithmetic circuit is coupled to the analog-to-digital converter circuit, and configured to obtain a calibration parameter according to the digital reference signal. The source driver calibrates a sensing path for sensing a display panel according to the calibration parameter when the source driver is operated in a sensing mode.