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公开(公告)号：US20200005694A1
公开(公告)日：2020-01-02
申请号：US16566870
申请日：2019-09-10
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Chieh Lin , Shang-I Liu , Hua-Gang Chang
IPC: G09G3/00 , G09G3/3275 , G09G3/3266
Abstract: An apparatus and a method for sensing a display panel are provided. The apparatus includes a source driving circuit and a sensing circuit. The source driving circuit is coupled to data lines to drive the pixel circuits according to a display period comprising frame periods. The sensing circuit is coupled to a plurality of pixel circuits. The sensing circuit senses characteristics of the pixel circuits in the test data periods of the display period. The test data periods are periodically arranged in the display period. In each of the test data periods, a corresponding pixel circuit receives test data, and the sensing circuit senses the electrical characteristic of the corresponding pixel circuit. In the scan-line periods of each of the frame periods, the corresponding pixel circuit receives display data from a corresponding data line, and the sensing circuit does not sense the corresponding pixel circuit.
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公开(公告)号：US10453368B2
公开(公告)日：2019-10-22
申请号：US16242004
申请日：2019-01-08
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Chieh Lin , Shang-I Liu , Hua-Gang Chang
IPC: G09G3/00 , G09G3/3275 , G09G3/3266
Abstract: An apparatus and a method for sensing a display panel are provided. The apparatus includes a source driving circuit and a sensing circuit. The source driving circuit is coupled to data lines to drive the pixel circuits according to a display period comprising frame periods. The sensing circuit is coupled to a plurality of pixel circuits. The sensing circuit senses characteristics of the pixel circuits in the test data periods of the display period. The test data periods are periodically arranged in the display period. In each of the test data periods, a corresponding pixel circuit receives test data, and the sensing circuit senses the electrical characteristic of the corresponding pixel circuit. In the scan-line periods of each of the frame periods, the corresponding pixel circuit receives display data from a corresponding data line, and the sensing circuit does not sense the corresponding pixel circuit.
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公开(公告)号：US10210783B2
公开(公告)日：2019-02-19
申请号：US16112775
申请日：2018-08-27
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Chieh Lin , Shang-I Liu , Hua-Gang Chang
IPC: G09G3/00 , G09G3/3266 , G09G3/3275 , G09G3/3233
Abstract: An apparatus and a method for sensing a display panel are provided. The apparatus includes a source driving circuit and a sensing circuit. The source driving circuit is coupled to data lines to drive the pixel circuits according to a scan-line period for scanning one of the scan lines. The sensing circuit is coupled to a plurality of pixel circuits. The sensing circuit senses characteristics of the pixel circuits according to the scan-line period for scanning one of the scan lines, wherein the scan-line period comprises a display data period and a test data period. In the test data period, a corresponding pixel circuit receives test data, and the sensing circuit senses the electrical characteristic of the corresponding pixel circuit. In the display data period, the corresponding pixel circuit receives display data from a corresponding data line, and the sensing circuit does not sense the corresponding pixel circuit.
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公开(公告)号：US20180366046A1
公开(公告)日：2018-12-20
申请号：US16112775
申请日：2018-08-27
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Chieh Lin , Shang-I Liu , Hua-Gang Chang
IPC: G09G3/00 , G09G3/3266 , G09G3/3275 , G09G3/3233
CPC classification number: G09G3/006 , G09G3/3233 , G09G3/3266 , G09G3/3275 , G09G2310/0286 , G09G2310/08 , G09G2320/043 , G09G2330/12
Abstract: An apparatus and a method for sensing a display panel are provided. The apparatus includes a source driving circuit and a sensing circuit. The source driving circuit is coupled to data lines to drive the pixel circuits according to a scan-line period for scanning one of the scan lines. The sensing circuit is coupled to a plurality of pixel circuits. The sensing circuit senses characteristics of the pixel circuits according to the scan-line period for scanning one of the scan lines, wherein the scan-line period comprises a display data period and a test data period. In the test data period, a corresponding pixel circuit receives test data, and the sensing circuit senses the electrical characteristic of the corresponding pixel circuit. In the display data period, the corresponding pixel circuit receives display data from a corresponding data line, and the sensing circuit does not sense the corresponding pixel circuit.
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公开(公告)号：US10720106B2
公开(公告)日：2020-07-21
申请号：US16198687
申请日：2018-11-21
Applicant: Novatek Microelectronics Corp.
Inventor： Hua-Gang Chang , Shang-I Liu
IPC: G09G3/3258 , H01L27/32 , G09G3/32 , H01L27/15 , G09G3/00
Abstract: A driving apparatus for driving a display panel including a connection pad, a selecting circuit, a data driving circuit and a detection circuit is provided. The selecting circuit is electrically connected to a data line of the display panel through the connection pad. The data driving circuit outputs a data voltage to a pixel circuit of the display panel through the selecting circuit and the connection pad in a display stage. The detection circuit provides a detection signal to a light-emitting element of the pixel circuit through the selecting circuit and the connection pad in a detection stage, and detects a resultant signal with respect to an electric characteristic of the light-emitting element of the pixel circuit in the detection stage.
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Patent Agency Ranking
公开(公告)号：US10388207B2
公开(公告)日：2019-08-20
申请号：US15238728
申请日：2016-08-17
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hua-Gang Chang , Shang-I Liu , Chun-Chieh Lin
IPC: G09G3/32 , G09G3/20 , G09G3/3225 , G09G3/3275
Abstract: An external compensation method for devices in a panel which comprises a plurality of sub-pixels, includes programming a first device in a first sub-pixel among the plurality of sub-pixels via a first line and sensing the first device via a second line during a first period; and programming a second device in a second sub-pixel among the plurality of sub-pixels via the second line and sensing the second device via the first line or a third line during a second period.
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公开(公告)号：US20190156757A1
公开(公告)日：2019-05-23
申请号：US16198687
申请日：2018-11-21
Applicant: Novatek Microelectronics Corp.
Inventor： Hua-Gang Chang , Shang-I Liu
IPC: G09G3/3258 , H01L27/32 , G09G3/00 , H01L27/15
Abstract: A driving apparatus for driving a display panel including a connection pad, a selecting circuit, a data driving circuit and a detection circuit is provided. The selecting circuit is electrically connected to a data line of the display panel through the connection pad. The data driving circuit outputs a data voltage to a pixel circuit of the display panel through the selecting circuit and the connection pad in a display stage. The detection circuit provides a detection signal to a light-emitting element of the pixel circuit through the selecting circuit and the connection pad in a detection stage, and detects a resultant signal with respect to an electric characteristic of the light-emitting element of the pixel circuit in the detection stage.
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公开(公告)号：US20180337646A1
公开(公告)日：2018-11-22
申请号：US15716789
申请日：2017-09-27
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Po-Yu Tseng , Jhih-Siou Cheng , Shang-I Liu , Chih-Hsien Chou
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes a first current source, a first transistor, a second transistor, a third transistor, and a fourth transistor. The control terminal of the first transistor receives a first input signal. The control terminal of the second transistor receives a second input signal. The third transistor has a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the second transistor. The fourth transistor has a first terminal coupled to the second terminal of the second transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the first transistor.
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公开(公告)号：US10068528B2
公开(公告)日：2018-09-04
申请号：US15259052
申请日：2016-09-08
Applicant: Novatek Microelectronics Corp.
Inventor： Chun-Chieh Lin , Shang-I Liu , Hua-Gang Chang
IPC: G09G3/3258 , G09G3/3275 , G09G3/3266
Abstract: An apparatus and a method for sensing a display panel are provided. The apparatus includes a gate driving circuit and a sensing circuit. The gate driving circuit may scan the scan-lines during a plurality of scan-line periods within a frame period. The sensing circuit is coupled to a plurality of pixel circuits. A corresponding scan-line period of the scan-line periods is divided into a test data period and a display data period. In the test data period, the sensing circuit controls a corresponding pixel circuit to receive the test data, and the sensing circuit senses the electrical characteristic of the corresponding pixel circuit. In the display data period, the sensing circuit controls the corresponding pixel circuit to receive the display data from a corresponding data line, and the sensing circuit does not sense the corresponding pixel circuit.
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公开(公告)号：US20170352305A1
公开(公告)日：2017-12-07
申请号：US15238728
申请日：2016-08-17
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hua-Gang Chang , Shang-I Liu , Chun-Chieh Lin
IPC: G09G3/20 , G09G3/3225 , G09G3/3275
CPC classification number: G09G3/2085 , G09G3/3225 , G09G3/3275 , G09G2310/027 , G09G2310/0291 , G09G2310/0297 , G09G2320/0233 , G09G2320/043 , G09G2330/10 , G09G2330/12
Abstract: An external compensation method for devices in a panel which comprises a plurality of sub-pixels, includes programming a first device in a first sub-pixel among the plurality of sub-pixels via a first line and sensing the first device via a second line during a first period; and programming a second device in a second sub-pixel among the plurality of sub-pixels via the second line and sensing the second device via the first line or a third line during a second period.
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