公开(公告)号：US11087684B1

公开(公告)日：2021-08-10

申请号：US16850025

申请日：2020-04-16

Applicant: NOVATEK Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: G09G3/3233

Abstract: A pixel driver includes a driving circuit, a data input circuit, a first switch circuit and a second switch circuit. A driving circuit is configured to provide a driving current to drive a pixel element during an emission period. A data input circuit is electrically coupled to the driving circuit, and is configured to receive a data voltage during a data input period. A first switch circuit is electrically coupled to the driving circuit. The first switch circuit is turned on to provide a first voltage to the driving circuit during the data input period. A second switch circuit is electrically coupled to the driving circuit. The second switch circuit is turned on to provide a second voltage to the driving circuit during the emission period, and the first switch circuit is turned off during the emission period.

公开(公告)号：US20200090578A1

公开(公告)日：2020-03-19

申请号：US16503651

申请日：2019-07-05

Applicant: Novatek Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: G09G3/32 ,  G09G3/20

Abstract: A current driving digital pixel apparatus including a power rail, a common rail, a micro light emitting device, and a current driver is provided. The power rail is configured to supply a source current. The micro light emitting device is electrically coupled to the common rail. The current driver includes a first switching device electrically coupled to the power rail and a current mirror device electrically coupled between the first switching device and the micro light emitting device. The current mirror device receives the source current from the power rail through the first switching device and supplies a current to the micro light emitting device. The first switching device is a low voltage device and the current mirror device is a medium voltage device.

公开(公告)号：US09891642B2

公开(公告)日：2018-02-13

申请号：US14790006

申请日：2015-07-02

Applicant: NOVATEK Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: G05F3/24 ,  G05F1/56 ,  G05F3/20

CPC classification number: G05F1/56 ,  G05F3/205 ,  G05F3/242 ,  G05F3/262 ,  H03F2200/15 ,  H03F2203/45244

Abstract: A current source with hysteresis for an output circuit includes a tail current transistor, a resistor and a differential pair. The tail current transistor is used for supplying a current to the output circuit. The resistor is coupled to a drain terminal of the tail current transistor. The differential pair, coupled to the resistor, is used for controlling a magnitude of the current supplied to the output circuit. The differential pair includes a first transistor, of which a bulk terminal is coupled to a terminal of the resistor; and a second transistor, of which a bulk terminal is coupled to another terminal of the resistor.

公开(公告)号：US20170003697A1

公开(公告)日：2017-01-05

申请号：US14790006

申请日：2015-07-02

Applicant: NOVATEK Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: G05F1/56

CPC classification number: G05F1/56 ,  G05F3/205 ,  G05F3/242 ,  G05F3/262 ,  H03F2200/15 ,  H03F2203/45244

Abstract: A current source with hysteresis for an output circuit includes a tail current transistor, a resistor and a differential pair. The tail current transistor is used for supplying a current to the output circuit. The resistor is coupled to a drain terminal of the tail current transistor. The differential pair, coupled to the resistor, is used for controlling a magnitude of the current supplied to the output circuit. The differential pair includes a first transistor, of which a bulk terminal is coupled to a terminal of the resistor; and a second transistor, of which a bulk terminal is coupled to another terminal of the resistor.

Abstract translation: 具有用于输出电路的滞后的电流源包括尾电流晶体管，电阻器和差分对。 尾电流晶体管用于向输出电路提供电流。 电阻器耦合到尾电流晶体管的漏极端子。 耦合到电阻器的差分对用于控制提供给输出电路的电流的大小。 差分对包括第一晶体管，其中体端子耦合到电阻器的端子; 以及第二晶体管，其中体积端子耦合到电阻器的另一个端子。

公开(公告)号：US09013223B2

公开(公告)日：2015-04-21

申请号：US14016249

申请日：2013-09-03

Applicant: Novatek Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: H03L5/00 ,  H03K19/0175

CPC classification number: H03K19/017509

Abstract: A level conversion circuit including a first level shifter and a second level shifter is provided. The first level shifter converts a first control voltage into a second control voltage during a voltage conversion period. The second level shifter is coupled to the first level shifter. The second level shifter converts the second control voltage into a third control voltage during the voltage conversion period to control a next stage circuit. The first level shifter is configured to detect a voltage level of a power domain where the third control voltage operates and generate a plurality of middle voltages based on the detection result. The second level shifter is configured to generate the third control voltage based on the middle voltages. Furthermore, a voltage level conversion method is also provided.

Abstract translation: 提供了包括第一电平移位器和第二电平转换器的电平转换电路。 第一电平移位器在电压转换期间将第一控制电压转换为第二控制电压。 第二电平移位器耦合到第一电平移位器。 第二电平移位器在电压转换期间将第二控制电压转换为第三控制电压以控制下一级电路。 第一电平移位器被配置为基于检测结果检测第三控制电压工作的电力域的电压电平并产生多个中间电压。 第二电平移位器被配置为基于中间电压产生第三控制电压。 此外，还提供了电压电平转换方法。

公开(公告)号：US20140368253A1

公开(公告)日：2014-12-18

申请号：US14016249

申请日：2013-09-03

Applicant: Novatek Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: H03K19/0175

CPC classification number: H03K19/017509

Abstract: A level conversion circuit including a first level shifter and a second level shifter is provided. The first level shifter converts a first control voltage into a second control voltage during a voltage conversion period. The second level shifter is coupled to the first level shifter. The second level shifter converts the second control voltage into a third control voltage during the voltage conversion period to control a next stage circuit. The first level shifter is configured to detect a voltage level of a power domain where the third control voltage operates and generate a plurality of middle voltages based on the detection result. The second level shifter is configured to generate the third control voltage based on the middle voltages. Furthermore, a voltage level conversion method is also provided.

Abstract translation: 提供了包括第一电平移位器和第二电平转换器的电平转换电路。 第一电平移位器在电压转换期间将第一控制电压转换为第二控制电压。 第二电平移位器耦合到第一电平移位器。 第二电平移位器在电压转换期间将第二控制电压转换为第三控制电压以控制下一级电路。 第一电平移位器被配置为基于检测结果来检测第三控制电压工作的电力域的电压电平并产生多个中间电压。 第二电平移位器被配置为基于中间电压产生第三控制电压。 此外，还提供了电压电平转换方法。

公开(公告)号：US20140009511A1

公开(公告)日：2014-01-09

申请号：US13923379

申请日：2013-06-21

Applicant: Novatek Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: G09G3/36

CPC classification number: G09G3/3614 ,  G09G3/3685 ,  G09G2310/0297 ,  G09G2330/021

Abstract: A power selector, a source driver and an operating method thereof are provided. The source driver includes a plurality of channel groups. Each channel group includes a first and a second switching unit, a first and a second multiplexer, and an operating voltage control module. The first and the second switching unit respectively receive a first-polarity grayscale data and a second-polarity grayscale data. Output terminals of the first and the second multiplexer are respectively coupled to a first and a second data line. The operating voltage control module switches operating voltages of the first and the second multiplexer to a first operating power set or a second operating power set according to polarities of the first and the second data line and controls the first and the second switching unit to prevent the first and the second multiplexer from receiving the first-polarity grayscale data and the second-polarity grayscale data simultaneously.

Abstract translation: 提供电源选择器，源驱动器及其操作方法。 源驱动器包括多个通道组。 每个通道组包括第一和第二开关单元，第一和第二多路复用器以及工作电压控制模块。 第一和第二开关单元分别接收第一极性灰度数据和第二极性灰度数据。 第一和第二多路复用器的输出端分别耦合到第一和第二数据线。 操作电压控制模块根据第一和第二数据线的极性将第一和第二多路复用器的工作电压切换到第一工作功率组或第二工作功率组，并且控制第一和第二开关单元以防止 第一和第二多路复用器同时接收第一极性灰度数据和第二极性灰度数据。

公开(公告)号：US20130293520A1

公开(公告)日：2013-11-07

申请号：US13753533

申请日：2013-01-30

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Sheng-Wen Hsiao ,  Wen-Pin Tsai

IPC: G09G3/02

CPC classification number: G09G3/02 ,  G09G3/3614 ,  G09G3/3688 ,  G09G2310/0297 ,  G09G2310/08 ,  G09G2330/021

Abstract: A display driving device and a method for driving a display panel are provided. The display driving device includes the display panel and a display driver. The display panel includes a plurality of pixel units and a plurality of multiplexers. Each of the multiplexers is disposed with N data lines. The display driver provides a plurality of display data strings and a plurality of selection signals to the multiplexers to control the multiplexers according to the selection signals to receive and sequentially output the display data of the pixel units. Each of the display data strings forms two display data sets of different polarities in a same scan line, and the display data sets include the display data of at least one pixel unit. Thereby, the polarity inversion number of the display data and accordingly the power consumption can be reduced when the display driving device drives the pixel units.

Abstract translation: 提供一种用于驱动显示面板的显示驱动装置和方法。 显示驱动装置包括显示面板和显示驱动器。 显示面板包括多个像素单元和多个多路复用器。 每个复用器都配置有N条数据线。 显示驱动器向多路复用器提供多个显示数据串和多个选择信号，以根据选择信号控制多路复用器，以接收并依次输出像素单元的显示数据。 每个显示数据串在相同的扫描线上形成两个不同极性的显示数据组，并且显示数据组包括至少一个像素单元的显示数据。 因此，当显示驱动装置驱动像素单元时，可以减少显示数据的极性反转次数和相应的功耗。