Abstract: The invention provides a display device and a display panel. The display device includes the display panel and a reading circuit. The display panel includes an upper substrate, a lower substrate, a thin-film transistor (TFT) layer, and a photosensitive circuit. The TFT layer is disposed between the upper substrate and the lower substrate. A plurality of TFTs of a pixel array of the display panel are disposed in the TFT layer. The photosensitive circuit is disposed in the TFT layer to sense an ambient light. The reading circuit is coupled to the photosensitive circuit to read a sensing result.

Abstract: A pixel circuit includes a first transistor, a second transistor, a first capacitor, a third transistor, a second capacitor, and a fourth transistor. The first transistor is configured to receive a power voltage. The second transistor is configured to receive a data voltage and is coupled to a gate terminal of the first transistor. The first capacitor is coupled between the gate terminal of the first transistor and a source terminal of the first transistor. The third transistor is coupled between the source terminal of the first transistor and a light-emitting element. The second capacitor is coupled between the source terminal of the first transistor and a reference voltage. The fourth transistor is coupled between the source terminal of the first transistor and a reset voltage.

Abstract: A method of backlight control for a display panel is provided. The display panel is configured to display with a variable refresh rate in a plurality of frame periods each having a fixed period and a variable period. The method includes steps of: generating a first backlight control signal in the fixed period of a frame period; determining whether a liquid crystal (LC) transition time corresponding to the frame period ends before an end time of the variable period of the frame period; generating a second backlight control signal in the variable period of the frame period when the LC transition time ends before the end time of the variable period of the frame period; and generating a compensation backlight control signal in a next frame period according to a backlight duty cycle of the frame period.

Abstract: A precharge method for a data driver includes steps of: outputting a display data to a plurality of output terminals of the data driver; outputting a second precharge voltage to an output terminal among the plurality of output terminals prior to outputting the display data to the output terminal, to precharge the output terminal to a voltage level closer to an output voltage; and outputting a first precharge voltage to the output terminal prior to outputting the second precharge voltage. The first precharge voltage provides a faster voltage transition on the output terminal than the second precharge voltage.

Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit generates an output signal according to an input signal and a control signal. The ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. The control circuit generates the control signal according to the output signal, a reference signal, and the ramp signal.

Abstract: A light-emitting diode LED driver and a LED driving device including the LED driver are provided. The light-emitting diode LED driver includes a decoding circuit that receives a data signal and decodes the data signal to generate display data used to drive LEDs to emit light and display and a recovered clock signal. Further provided is an encoding circuit that encodes the decoded display data by using the recovered clock signal to generate an encoded data signal, where the data signal is encoded in a first encoding format, and the encoded data signal is encoded in a second encoding format.

Abstract: A touch device with the FPR function includes a plurality of sensing regions, a plurality of first switch sets, a plurality of first shift register circuits, a plurality of second switch sets, and a plurality of second shift register circuits. The first switch sets are coupled to transmitting electrodes and to transmit a first signal. The first shift register circuits are to control the first switch sets according to a plurality of first reset signals and a plurality of first control signals respectively. The second switch sets are coupled to receiving electrodes and to receive a second signal. The second shift register circuits are to control the second switch sets according to a second reset signal and a plurality of second control signals. The first signal and the second signal are for a touch operation and a FPR operation.

Abstract: A method and device of fingerprint image generation for saving memory. The method includes generating a first fingerprint image of an original data size according to a plurality of first analog sensing signals which are read from a fingerprint sensor array before an exposure period ends. Then the first fingerprint image represented by a first data size which is equivalent to or smaller than the original data size is stored. a second fingerprint image of the original data size is generated after generating the first fingerprint image of the original data size according to a plurality of second analog sensing signals which are read from the fingerprint sensor array during the exposure period. The second fingerprint image represented by a compressed data size smaller than the original data size is then stored.

Abstract: The present invention provides a readout integrated circuit and an operation method thereof. The readout integrated circuit includes a readout circuit, a line buffer and a communication interface circuit. The readout circuit reads out a plurality of row sensing results of a plurality of sensor rows of a sensor. The line buffer is coupled to the readout circuit for temporarily storing a current row sensing result of a current sensor row of the sensor. The communication interface circuit is coupled to the line buffer. After the current row sensing result of the current sensor row is temporarily stored into the line buffer, the communication interface circuit outputs the current row sensing result in real time to a host circuit.

Abstract: An optical fingerprint recognition device includes a light-emitting diode (LED) array and a fingerprint sensing device. The LED array includes a central LED area and an edge LED area, and configured to display a light source pattern in response to a fingerprint sensing request. The light source pattern includes a central portion and a surrounding portion. During displaying the light source pattern, a plurality of red display subpixels of the central LED area are not illuminating and a plurality of red display subpixels of the edge LED area are illuminating. The fingerprint sensing device generates a first fingerprint image according to a plurality of first sensing signals obtained from a plurality of first sensing pixel area, and the first fingerprint image is adapted to be used for examining whether a finger which triggers the fingerprint sensing request is real or fake.

Abstract: An electronic device includes an application processor and a display control circuit. The display control circuit may output a (tearing effect) TE signal to the application processor and receive an image frame from the application processor. A data processing circuit of the display control circuit generates a notification signal when the data processing circuit is ready to receive the image frame from the application processor. The timing controller generates the TE signal having a first frequency during a period from a first time point when the notification signal is received to a second time point when the application processor starts transmitting the image frame to the data processing circuit. The first frequency is greater than a reference frequency based on an output frame rate of the display control circuit.

Abstract: An analog front-end (AFE) circuit, configured to be coupled to a sensor having a plurality of sensing units, includes a plurality of sensing circuits and a plurality of multiplexers. Each of the plurality of multiplexers is coupled between one of the plurality of sensing units and at least two of the plurality of sensing circuits.

Abstract: A receiver of a display driver and an operating method of the receiver of the display driver are provided. The receiver of the display driver includes an input interface, an operational amplifier and a bias current control circuit. The input interface receives image data. The operational amplifier is coupled to the input interface and includes a bias current circuit. The bias current control circuit adjusts a bias current of the bias current circuit according to a data rate of the image data. The operating method is adapted to the receiver of the display driver.

Abstract: An active stylus and a method performed by the active stylus are provided. The active stylus includes a touch sensor inside. The touch sensor is arranged corresponding to a preset pen-holding region on an outer surface. The touch sensor is insulated from the pen body, when an external operating subject touches the preset pen-holding region and touches a touch panel, an uplink signal transmitted by the touch panel is coupled to the pen body via the external operating subject, as an uplink interference signal. The signal processing unit is for: generating a compensation signal; obtaining a compensated interference signal generated based on the compensation signal and the uplink interference signal; generating an uplink signal to be processed based on the received uplink signal and the compensated interference signal; and obtaining uplink information based on the uplink signal to be processed.

Abstract: A display driver circuit for controlling a display panel having a plurality of light-emission diode (LED) strings includes a plurality of current regulators and a control circuit. Each of the plurality of current regulators is configured to control one of the plurality of LED strings. The control circuit, coupled to the plurality of current regulators, is configured to generate a plurality of pulses in a plurality of pulse width modulation (PWM) signals and output each of the plurality of PWM signals to a respective current regulator among the plurality of current regulators. Wherein, the plurality of pulses are scrambled.

Abstract: A first driver circuit is configured to cooperate with a second driver circuit to control a display panel, wherein the first driver circuit is configured to output display data to a first area of the display panel and the second driver circuit is configured to output display data to a second area of the display panel. A method used for the first driver circuit includes outputting at least one emission control signal to control the second area of the display panel when the second driver circuit is disabled.

Abstract: An electronic device includes an application processor and a display control circuit. The display control circuit may output a (tearing effect) TE signal to the application processor and receive an image frame from the application processor. A data processing circuit of the display control circuit generates a notification signal when the data processing circuit is ready to receive the image frame from the application processor. The timing controller generates the TE signal having a first frequency during a period from a first time point when the notification signal is received to a second time point when the application processor starts transmitting the image frame to the data processing circuit. The first frequency is greater than a reference frequency based on an output frame rate of the display control circuit.

Abstract: A source driver includes a first DAC for driving a first-color subpixel and a second DAC for driving a second-color subpixel. Each DAC is configured to output at least one output voltage according to an N-bit data code, and includes a plurality of sub-DACs, an interpolation circuit and a switch circuit. Each sub-DAC receives m bits of the N-bit data code and generates a set of intermediate voltages accordingly. The interpolation circuit performs an interpolation on a selected set of intermediate voltages according to k bits of the N-bit data code and at least one interpolation control signal, to generate the output voltage. The switch circuit electrically connects the interpolation circuit and a selected sub-DAC which outputs the selected set of intermediate voltages. The interpolation circuit of the first DAC and the interpolation circuit of the second DAC respectively perform the interpolation according to different numbers of interpolation bits.

Abstract: A source driver, including a plurality of channel circuits, each of the plurality of channel circuits including a first digital-to-analog converter (DAC), a second DAC, a first switch, a second switch and an output buffer circuit, is provided. The output terminal of the output buffer circuit is configured to be coupled to a data line of a display panel. An output terminal of the first DAC is coupled to a first input terminal among the input terminals of the output buffer circuit. An output terminal of the second DAC is coupled to a second input terminal among the input terminals of the output buffer circuit. The first switch is disposed along a first signal path between the output terminal of the first DAC and the output terminal of the output buffer circuit. The second switch is disposed along a second signal path between the output terminal of the second DAC and the output terminal of the output buffer circuit.

Abstract: An organic light emitting diode (OLED) display control circuit and a control method thereof are provided. The OLED control circuit includes a counting unit, a judgment unit, a remainder calculation unit and a signal compensation unit. The counting unit counts display lines of a current frame according to a vertical synchronization signal to generate a first count value. The judgment unit compares the first count value and a second count value to generate a judgment result. The second count value represents the number of display lines of a previous frame preceding to the current frame. The remainder calculation unit calculates a remainder generated by dividing the first count value by a period of an emission control signal. The signal compensation unit adjusts the emission control signal to compensate for an incomplete period of the emission control signal occurring in the end of the current frame period.