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公开(公告)号：US11094248B2
公开(公告)日：2021-08-17
申请号：US16824712
申请日：2020-03-20
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao
Abstract: An LED driving apparatus for driving an LED array including an output terminal group and a converter group is provided. The output terminal group includes a plurality of output terminals. The converter group includes a plurality of digital-to-analog converters. Each of the digital-to-analog converters outputs a driving current according to pixel data to drive a corresponding one of the LEDs. Each of digital-to-analog converters includes a plurality of sub-driving current generating circuits. The sub-driving current generating circuits are coupled to the corresponding output terminal of the output terminal group. Each of the sub-driving current generating circuits generates a sub-driving current having a current value corresponding to a bit order of a bit of the pixel data. The driving current is generated by summing up the sub-driving currents.
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公开(公告)号：US20200302857A1
公开(公告)日：2020-09-24
申请号：US16824712
申请日：2020-03-20
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao
IPC: G09G3/32
Abstract: An LED driving apparatus for driving an LED array including an output terminal group and a converter group is provided. The output terminal group includes a plurality of output terminals. The converter group includes a plurality of digital-to-analog converters. Each of the digital-to-analog converters outputs a driving current according to pixel data to drive a corresponding one of the LEDs. Each of digital-to-analog converters includes a plurality of sub-driving current generating circuits. The sub-driving current generating circuits are coupled to the corresponding output terminal of the output terminal group. Each of the sub-driving current generating circuits generates a sub-driving current having a current value corresponding to a bit order of a bit of the pixel data. The driving current is generated by summing up the sub-driving currents.
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公开(公告)号：US11842677B1
公开(公告)日：2023-12-12
申请号：US18073441
申请日：2022-12-01
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao
IPC: G09G3/32
CPC classification number: G09G3/32 , G09G2300/0426 , G09G2300/0819 , G09G2300/0852 , G09G2310/061 , G09G2310/08
Abstract: The disclosure provides a pixel circuit of a display panel. The pixel circuit includes a light-emitting element, a transistor, a first capacitor, a second capacitor, a first switch, and a second switch. The transistor is disposed in a driving current path to adjust the driving current of the light-emitting element. A first terminal of the first switch is coupled to a data line. A second terminal of the first switch is coupled to a first terminal of the first capacitor and a control terminal of the transistor. A first terminal of the second switch is coupled to a second terminal of the first capacitor and a first terminal of the second capacitor. A second terminal of the second switch is coupled to a first terminal of the transistor. A second terminal of the second capacitor is coupled to a reference voltage.
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公开(公告)号：US11776477B1
公开(公告)日：2023-10-03
申请号：US18147112
申请日：2022-12-28
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Sheng-Wen Hsiao
IPC: G09G3/3233
CPC classification number: G09G3/3233 , G09G2300/0823
Abstract: A pixel circuit of a display panel is provided, including a first, second, third, fourth, fifth switch, a first capacitor and a diode. The first switch is connected with a positive supplied power voltage. The second switch is connected with the first switch and a data line. The third switch is connected with the first and second switch, generating an emission current as a driving transistor. First end of the first capacitor is connected with the first, second and third switch. Second end of the first capacitor is connected with the third, fourth and fifth switch. The fifth switch is connected with a first initial voltage. Anode of the diode is connected with the third and fourth switch while its cathode is connected with a negative emission source voltage. By configuration of the disclosed pixel circuit, a power rail emission current is independent, without being involved with initial voltages.
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公开(公告)号：US11308306B2
公开(公告)日：2022-04-19
申请号：US17107962
申请日：2020-12-01
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang , Chih-Peng Hsia , Wei-Lun Shih , Hong-Chu Chen , Su-Wei Lien , Sheng-Wen Hsiao , Liang-Chi Cheng
Abstract: A control method for an optical fingerprint sensor and a touch controller are provided for canceling or reducing capacitive loading. The optical fingerprint sensor includes a plurality of pixels, and each of the pixels has a first control signal line and a second control signal line. Each of the pixels is further coupled to a first voltage source line, a second voltage source line and a sensing line. The control method includes the step of applying an anti-loading driving (ALD) signal on at least one of the first control signal line, the second control signal line, the first voltage source line, the second voltage source line and the sensing line when the touch controller is in a touch operation period.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20200342196A1
公开(公告)日：2020-10-29
申请号：US16907176
申请日：2020-06-20
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang , Chih-Peng Hsia , Wei-Lun Shih , Hong-Chu Chen , Su-Wei Lien , Sheng-Wen Hsiao , Liang-Chi Cheng
Abstract: The present invention provides a control method for an optical fingerprint sensor. The optical fingerprint sensor includes a plurality of pixels, and each of the pixels has a first control signal line and a second control signal line. Each of the pixels is further coupled to a first voltage source line, a second voltage source line and a sensing line. The control method includes a plurality of steps, and the steps are applying a first anti-loading driving (ALD) signal on the second control signal line, and applying a second ALD signal on at least one of the first control signal line, the first voltage source line, the second voltage source line and the sensing line.
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公开(公告)号：US11562685B2
公开(公告)日：2023-01-24
申请号：US17402646
申请日：2021-08-16
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao
Abstract: An LED driving apparatus for driving an LED array including a plurality of digital-to-analog converters and a plurality of data latch circuits is provided. Each of the digital-to-analog converters is coupled to a corresponding LED, and outputs a driving current according to n-bits pixel data to drive the corresponding LED. Each of the plurality of data latch circuits stores the n-bits pixel data, and is coupled to a corresponding digital-to-analog converter to control the n-bits pixel data to be written into the corresponding digital-to-analog converter. Each of digital-to-analog converters includes n sub-driving current generating circuits. Each of the n sub-driving current generating circuits generates a sub-driving current having a current value corresponding to a bit order of a bit of the n-bits pixel data. The driving current is generated by summing up n sub-driving currents.
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8.发明授权公开(公告)号：US11301072B2
公开(公告)日：2022-04-12
申请号：US17000375
申请日：2020-08-24
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao , Liang-Chi Cheng
Abstract: A driving circuit configured to drive a display panel having a touch panel is provided. The driving circuit modulates a plurality of first voltage signals on a plurality of different first signals and provides the modulated first signals to the gate control circuit on the display panel. A plurality of gate lines of the display panel are driven according to the modulated first signals during a sensing period. The driving circuit modulates a plurality of second voltage signals on a second signal. The sensor pads of the touch panel are driven according to the modulated second signal during the sensing period. The driving circuit modulates a plurality of third voltage signals on a third signal and provides the modulated third signal to non-active sensor pads during the sensing period. A method for driving a display panel having a touch panel and a display apparatus are also provided.
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9.发明申请公开(公告)号：US20200341050A1
公开(公告)日：2020-10-29
申请号：US16396749
申请日：2019-04-28
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao
Abstract: A current driver array test apparatus is provided for testing a plurality of current drivers in an array, each of the current drivers provides a current when being activated. The current driver array test apparatus includes a plurality of test switches, a common test-enable pin, a common test-output pin, and a detector. One test switch is electrically coupled to one current driver. The common test-enable pin is coupled to each of the test switches. The common test-output pin is coupled to each of the test switches and receives the current. The detector is electrically coupled to the common test-output pin and receives the current from the common test-output pin. The number of the common test enable pin and the common test-output pin is only one. A current driver array test method and a micro light emitting diode array test method using the current driver array test apparatus are also provided.
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公开(公告)号：US11861089B2
公开(公告)日：2024-01-02
申请号：US17686422
申请日：2022-03-04
Applicant: Novatek Microelectronics Corp.
Inventor： Sheng-Wen Hsiao , Liang-Chi Cheng
CPC classification number: G06F3/0412 , G06F3/041 , G06F3/044 , G06F3/0416 , G06F3/0446 , G06F3/04164 , G06F3/04166 , G06F3/04186 , G09G3/20 , G09G3/3688
Abstract: A driving circuit configured to drive a touch display panel is provided. The driving circuit includes a signal generating circuit and a sensor driving circuit. The signal generating circuit is configurable to be coupled to gate lines of the touch display panel via a gate control circuit. The signal generating circuit modulates a plurality of voltage signals on a first driving signal and a second driving signal, and provides the modulated first driving signal and the modulated second driving signal to the gate control circuit to drive the gate lines during a sensing period. The sensor driving circuit is configurable to be coupled to sensor pads of the touch display panel. The sensor driving circuit modulates the voltage signals on a third driving signal, and drives the sensor pads with the modulated third driving signal during the sensing period. A method for driving a touch display panel is also provided.
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