公开(公告)号：US20230306900A1

公开(公告)日：2023-09-28

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

CPC classification number: G09G3/32 ,  G09G2320/064 ,  G09G2330/021

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：US11521542B2

公开(公告)日：2022-12-06

申请号：US16953364

申请日：2020-11-20

Applicant: NOVATEK Microelectronics Corp.

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

IPC: G09G3/20 ,  G09G3/32

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：US11282438B2

公开(公告)日：2022-03-22

申请号：US16919069

申请日：2020-07-01

Applicant: Novatek Microelectronics Corp.

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

IPC: G09G3/32

Abstract: A driver circuit configured to receive a display data and drive a display panel is provided. The display panel includes a plurality of light-emitting diode devices according to the display data. The driver circuit includes a data driver. The data driver is configured to output driving signals to drive the light-emitting diode devices according to the display data and operate in different operation modes according to a control signal. The data driver includes a plurality of output channels. The output channels output the driving signals to drive the light-emitting diode devices via respective output terminals of the driver circuit. An assignment relationship of the display data and the output channels is different in the different operation modes. A display apparatus including the driver circuit is also provided.

公开(公告)号：US10804865B1

公开(公告)日：2020-10-13

申请号：US16729495

申请日：2019-12-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chieh-An Lin ,  Yen-Ru Kuo ,  Jhih-Siou Cheng ,  Ju-Lin Huang

IPC: H03M1/12 ,  H03F3/45

Abstract: A current integrator includes an operational amplifier, an integration capacitor and an offset cancelation capacitor. The operational amplifier includes a first input stage and a second input stage. The first input stage is coupled to an input terminal of the current integrator. The integration capacitor is coupled between the first input stage of the operational amplifier and an output terminal of the current integrator. The offset cancelation capacitor is coupled to the second input stage of the operational amplifier.

公开(公告)号：US10771016B2

公开(公告)日：2020-09-08

申请号：US16249911

申请日：2019-01-17

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 is coupled to the input amplifier and outputs an output voltage. The diode device is coupled between an output end and an input end of the output amplifier. When a voltage difference between the output end and the input end 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：US10594264B2

公开(公告)日：2020-03-17

申请号：US16021032

申请日：2018-06-28

Applicant: NOVATEK Microelectronics Corp.

Inventor： Cheng-En Hsieh ,  Shen-Iuan Liu ,  Tzu-Chien Tzeng ,  Jin-Yi Lin ,  Kuo-Sheng Huang ,  Ju-Lin Huang

IPC: H03G3/10 ,  H03F1/02 ,  H03F3/00 ,  H03F3/45 ,  H03G1/00 ,  H03K19/0185

Abstract: A dynamic amplifier includes a first output capacitor, a first switch, a current source, a second switch, a voltage detector, a third switch and a level shifter. The first switch is coupled between a first terminal of the first output capacitor and a voltage detection node. The second switch is coupled to the current source and the voltage detection node. The voltage detector is coupled to the voltage detection node and the first switch. The third switch is coupled between the voltage detection node and a power source. The level shifter is coupled to a second terminal of the first output capacitor.

公开(公告)号：USRE47432E1

公开(公告)日：2019-06-11

申请号：US15186555

申请日：2016-06-20

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ju-Lin Huang ,  Keko-Chun Liang ,  Chun-Yung Cho ,  Cheng-Hung Chen

IPC: H03B1/00 ,  G05F3/16

Abstract: An output stage circuit includes: a first transistor, including a first terminal coupled to a first node, a second terminal coupled to an output terminal, a third terminal coupled to an input terminal for receiving an input voltage, and a fourth terminal coupled to a first power terminal for receiving a first voltage; a second transistor, including a first terminal coupled to a second node, a second terminal coupled to the output terminal, a third terminal coupled to the input terminal for receiving the input voltage, and a fourth terminal coupled to ground; and a current source, coupled to the output terminal for providing a constant current.

公开(公告)号：US10283069B2

公开(公告)日：2019-05-07

申请号：US15954609

申请日：2018-04-17

Applicant: Novatek Microelectronics Corp.

Inventor： Ju-Lin Huang ,  Jhih-Siou Cheng

IPC: G09G3/36 ,  G02F1/1362

Abstract: A display panel including a plurality of pixel units, a plurality of source lines, a plurality of gate lines and a plurality of common electrode lines is provided. The pixels units are arranged in array. The array includes a plurality of columns and a plurality of rows. The source lines are respectively coupled with the pixel units disposed in a same column of the columns. The gate lines are respectively coupled with the pixel units disposed in a same row of the rows. The common electrode lines and gate lines extend parallelly with each other. At least one of the source date lines, the gate lines and the common electrode lines has the line widths varied along the extension direction thereof.

公开(公告)号：US10256967B2

公开(公告)日：2019-04-09

申请号：US15863983

申请日：2018-01-08

Applicant: Novatek Microelectronics Corp.

Inventor： Chang-Cheng Huang ,  Shen-Iuan Liu ,  Ju-Lin Huang ,  Tzu-Chien Tzeng ,  Keko-Chun Liang ,  Yu-Hsiang Wang ,  Che-Wei Yeh

IPC: H04L7/00 ,  H03L7/08 ,  H03L7/091 ,  H03L7/093 ,  H03L7/089

Abstract: A clock and data recovery circuit with jitter tolerance enhancement is provided. The CDR circuit includes: a bang-bang phase detector, a digital filter, a digitally controlled oscillator, and an adaptive loop gain control circuit. The CDR circuit detects a loop bandwidth variation and adjusts the loop bandwidth of CDR circuit by adjusting proportional path and integral path gain factors of the digital filter of the CDR circuit. The loop gain controller uses two methods to adjust the loop gain in CDR circuit: bang-bang adjusting method and linear adjusting method.

公开(公告)号：US10230334B2

公开(公告)日：2019-03-12

申请号：US15792774

申请日：2017-10-25

Applicant: Novatek Microelectronics Corp.

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

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

Abstract: An amplifier circuit including an input amplifier, an output amplifier and a diode device is provided. The output amplifier is coupled to the input amplifier and outputting an output voltage. The diode device is coupled between an output end and an input end of the output amplifier. When a voltage difference between the output end and the input end 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. The diode device includes a variable resistor to increase the barrier voltage of the diode device.