Novatek Microelectronics Corp.

Chiu-Huang Huang

Min-Hung Hu

Chen-Tsung Wu

Pin-Han Su

Chun-Wei Huang

Jung-Chung Lee

Ting-Hsuan Hung

Feng-Jung Kuo

Wen-Hao Yu

Po-Chi Lin

Juin-Wei Huang

An electronic circuit adapted to drive a display panel including touch sensors and fingerprint sensors is provided. The electronic circuit includes a first circuit, a second circuit and a switch circuit. The first circuit is configured to generate display driving signals for driving data lines of the display panel. The second circuit is configured to receive fingerprint sensing signals corresponding to a fingerprint image from fingerprint sensing lines of the display panel. The switch circuit includes a plurality of first terminals and a plurality of second terminals. The first terminals are coupled to the first circuit and the second circuit. The second terminals are configurable to be coupled to the display panel via a plurality of first pins of the electronic circuit. Each of the first pins is configurable to be coupled to a corresponding data line and a corresponding fingerprint sensing line of the display panel.

Electronic circuit having display driving function, touch sensing function and fingerprint sensing function

A fingerprint sensing apparatus includes a plurality of fingerprint sensors and a fingerprint readout circuit. The fingerprint sensors may be configured to operate in a fingerprint sensing cycle. The fingerprint readout circuit may be coupled to the plurality of fingerprint sensors via a plurality of sensing lines. The fingerprint readout circuit may be configured to control the fingerprint sensors to operate in the fingerprint sensing cycle. The fingerprint sensing cycle includes an initialization period, an exposure period and a readout period. A voltage of a reset node in each fingerprint sensor among the fingerprint sensors is reset to a first voltage in a reset period before the fingerprint sensing cycle starts. The voltage of the reset node in each fingerprint sensor is initialized to an initial voltage in the initialization period. The initial voltage is different from the first voltage.

Fingerprint sensing apparatus, fingerprint readout circuit, and touch display panel

A voltage regulator including a voltage amplifier, a first output-stage, an AC-pass filter, a current amplifier, a second output-stage and a gain circuit is provided. Output terminals of the first and the second output-stages jointly provide the output voltage of the voltage regulator. Two input terminals of the voltage amplifier respectively receive a reference voltage and the output voltage. An input terminal of the first output-stage is coupled to an output terminal of the voltage amplifier. Two input terminals of the current amplifier respectively receive a reference current and the AC component of the output voltage. An input terminal of the second output-stage is coupled to an output terminal of the current amplifier. An input terminal of the gain circuit is coupled to the output terminal of the voltage amplifier. An output terminal of the gain circuit is coupled to the input terminal of the second output-stage.

Voltage regulator with regulated-biased current amplifier

A current source for quickly adjusting an output current includes a constant current generation module, coupled to a control node, for generating a predefined current flowing through the control node in order to determine a voltage of the control node; a capacitor, coupled to an output terminal of the current source; a current variation detection module, coupled between the control node and the capacitor, for generating a variation on the voltage of the control node via the capacitor when the output terminal of the current source receives an instant current variation; and a trans-conductance amplifier, coupled between the control node and the output terminal, for changing a magnitude of the output current of the output terminal when the variation on the voltage of the control node is generated.

Current source for voltage regulator and voltage regulator thereof

A compensation module for a voltage regulation device having a gain stage, an output stage and a miller compensation module includes a low-output-impedance non-inverting amplifier unit coupled to a gain output of the gain stage and an output-stage input of the output stage.

Compensation module and voltage regulator

A voltage converting device with a self-reference feature for an electronic system includes a differential current generating module, implemented in a Complementary metal-oxide-semiconductor (CMOS) processing for generating a differential current pair according to a converting voltage; and a voltage converting module, coupled to the differential current generating module, a first supply voltage and a second supply voltage of the electronic system for generating the converting voltage according to the differential current pair, the first supply voltage and the second supply voltage.

Voltage converting device and electronic system thereof

The present invention discloses a bandgap reference circuit. The bandgap reference circuit includes an operational transconductance amplifier, and a reference generation circuit. The operational transconductance amplifier includes a self-biased operational transconductance amplifier, for utilizing an area difference between bipolar junction transistors of an input pair to generate a first positive temperature coefficient current to bias the input pair, and generating a positive temperature coefficient control voltage and a negative temperature coefficient control voltage; and a feedback voltage amplifier, for amplifying the negative temperature coefficient control voltage, and outputting a reference voltage to the input pair for feedback, to generate a first negative temperature coefficient current. The reference generation circuit generates a summation voltage or a summation current according to the positive temperature coefficient control voltage and the negative temperature coefficient control voltage.

Bandgap reference circuit and self-referenced regulator

A fast response current source capable of providing an output current is disclosed. The fast response current source includes a constant current generating block, a first feedback capacitor, a first current buffer and a first output current generating block. The constant current generating block provides a first constant current. The first current buffer generates a first buffering current to flow through the first feedback terminal, and changes a current value of the first buffering current in response to the current variation at the first feedback terminal when the voltage at the output terminal is varied. The first output current generating block generates a first output current to flow through the output terminal, and changes a current value of the first output current in response to the variation of the first buffering current when the voltage at the output terminal is varied.

Fast response current source

A multi-power domain operational amplifier includes an input stage circuit, a power domain transforming circuit and an active load. The input stage circuit is configured to transform a set of input voltages into a set of input currents in a first power domain. The power domain transforming circuit is configured to transform the set of input currents into a set of output currents in a second power domain. The active load is configured to generate an output voltage according to the set of output currents. A common mode range of the output voltage is shifted as compared with a common mode range of the set of input voltages.

Multi-power domain operational amplifier and voltage generator using the same

A driving method for driving a touch sensitive display device is disclosed. The touch sensitive display device includes a plurality of pixel units and a plurality of touch sensors both arranged in matrixes. The driving method includes generating a plurality of source driving signals according to an image signal to indicate color intensities of the plurality of pixel units, generating a plurality of scanning impulses according to a synchronization signal to indicate an updating sequence of the plurality of pixel units, and shrinking duty cycles of the plurality of scanning impulses to generate a plurality of sensor scanning impulses for triggering the plurality of touch sensors.

Growing community of inventors

Hsinchu County, Taiwan

Chiu-Huang Huang