Abstract: A ping-pong amplifier includes a ping stage and a pong stage. The ping stage includes a first input stage, a first gain stage, a first output stage and a first storage capacitor. The first input stage includes a first buffer circuit and a first auto-zeroing circuit. The first storage capacitor is coupled to the first auto-zeroing circuit. The pong stage, coupled to the ping stage, includes a second input stage, a second gain stage, a second output stage and a second storage capacitor. The second input stage includes a second buffer circuit and a second auto-zeroing circuit. The second storage capacitor is coupled to the second auto-zeroing circuit. The first output stage is coupled to the first gain stage or the second gain stage, and the second output stage is coupled to the first gain stage or the second gain stage.

Abstract: A display device and a test method for pixel circuit thereof are provided. The display device includes a pixel circuit, a switch circuit and a voltage readout circuit. The pixel circuit includes a storage capacitor, a driving transistor, a first voltage write-in channel, a voltage readout channel and a light-emitting element. In a test mode, the first voltage write-in channel is used to write a test voltage to the storage capacitor, and the voltage readout channel is used to transmit a readout voltage through a data line. The voltage readout circuit, in the test mode, is coupled to a data line through the switch circuit to receive the readout voltage from the voltage readout channel.

Abstract: A touch sensing system including a touch sensing apparatus and a stylus is provided. The touch sensing apparatus includes a driver circuit and a touch sensing panel. The driver circuit drives the touch sensor panel to output an uplink signal. The stylus outputs a downlink signal to the touch sensor panel according to the uplink signal. The driver circuit adjusts a frequency of the uplink signal according to an operation mode of the touch sensing apparatus.

Abstract: The image processing IC includes a down-scaler circuit, a picture quality processing circuit, and an up-scaler circuit. The down-scaler circuit converts a first image frame with a first resolution into a second image frame with a second resolution smaller than the first resolution by using a down-scaling operation. The picture quality processing circuit performs at least one picture quality processing on the second image frame to generate a third image frame. The up-scaler circuit converts the third image frame with a third resolution into a fourth image frame with a fourth resolution greater than the third resolution by using an up-scaling operation. The up-scaling operation performed by the up-scaler circuit is symmetrical to the down-scaling operation performed by the down-scaler circuit.

Abstract: A display driver circuit for controlling a display panel includes a first operational amplifier, a second operational amplifier and a first output switching circuit. The first output switching circuit is coupled to the first operational amplifier and the second operational amplifier. The first output switching circuit couples the first operational amplifier to a first data line of the display panel in a first scan period, to control the first operational amplifier to drive a first subpixel having a first color through the first data line. The first output switching circuit couples the first operational amplifier to a second data line of the display panel in a second scan period, to control the first operational amplifier to drive a second subpixel having the first color through the second data line.

Abstract: The disclosure describes a display device for examining the short-circuit/open-circuit status of a source line of a display panel and an integrated circuit thereof. The integrated circuit includes analog front-end (AFE) circuits and multiplexer groups. Each AFE circuit includes a non-inverting input terminal coupled to a first predetermined voltage and an inverting input terminal. Each multiplexer group includes multiplexers. Each multiplexer includes a first terminal coupled to one source line of the display panel and second terminals given by different settings. The source line is configured correspondingly to one of the different settings by electrically connecting the first terminal and a selected second terminal. One of the second terminals is coupled to the inverting input terminal of one of the AFE circuits corresponding to one of the multiplexer groups.

Abstract: An image processing method for a video processor includes receiving at a first input frame a first time instant and receiving a second input frame at a second time instant. When the second input frame is not a first next scheduled frame corresponding to the first input frame, according to the first and second input frames, a first inserted frame is generated using interpolation. When no input frame is received at a third time instant, according to the first and second input frames, a second inserted frame is generated using extrapolation. A time difference between the third and second time instants is substantially greater than or equal to a time difference threshold. The video playback smoothness can be improved by dynamically switching between extrapolation and interpolation.

Abstract: Provided are a stylus and a downlink transmission method thereof. The stylus includes an antenna portion, a frequency allocator and a modulation circuit. The modulation circuit is coupled to the frequency allocator and the antenna portion. The frequency allocator divides a transmission data to be given to a sensing panel into multiple frequency channel data. The multiple frequency channel data respectively correspond to different downlink frequencies. The modulation circuit modulates each of multiple carriers having different downlink frequencies based on a corresponding one among the multiple frequency channel data to generate multiple modulated downlink signals having different downlink frequencies for the antenna portion. The antenna portion emits the modulated downlink signals to the sensing panel.

Abstract: The invention provides an image processing method and an image processing device. The image processing method comprises: performing a first weighted average calculation on a plurality of luminance data of pixels in a first mask, to obtain a background average value with respect to a target pixel which is a center pixel of the first mask; performing a second weighted average calculation on a plurality of luminance data of pixels in a second mask, to obtain a foreground average value with respect to the target pixel which is also a center pixel of the second mask; generating a sharpness level according to a gain value and a difference between luminance data of the target pixel and the foreground average value with respect to the target pixel; and, adjusting the luminance data of the target pixel according to the sharpness level.

Abstract: A driving method configured to drive a display panel to display images is provided. The driving method includes: receiving a data signal from a video source via a connecting line, and detecting a noise signal on the connecting line; and outputting a pixel voltage having a same polarity in a current frame and a previous frame to drive the display panel when the noise signal is detected.

Abstract: A display control circuit and a display compensation method are provided. The display control circuit includes a storage unit and a compensation unit. The storage unit is configured to store a plurality of lookup tables corresponding to different predetermined emission duty cycles of a display panel. The compensation unit is configured to select at least one lookup table from the plurality of lookup tables according to an emission duty cycle corresponding to a current input frame. The compensation unit is configured to search each selected lookup table according to a first pixel data in a previous input frame and a second pixel data in the current input frame to obtain at least one output grayscale value for the each selected lookup table. The compensation unit is configured to determine a compensated second pixel data according to the at least one obtained output grayscale value.

Abstract: A knob device including a first layer and a second layer is provided. The first layer is disposed on a touch panel. The first layer includes a plurality of first conductive pads with interconnectors. The second layer is disposed on the first layer. The second layer includes a first conductive part. The first conductive part and the first conductive pads with the interconnects are connectable to provide a plurality of press states in response to a press operation. The first conductive part and the first conductive pads with the interconnectors are connectable to provide a plurality of rotation states in response to a rotation operation under the press operation.

Abstract: A bandgap reference voltage generation device includes at least one proportional to absolute temperature (PTAT) current generator, a bandgap reference voltage generation circuit, and a current compensator. The PTAT current generator generates a first proportional to absolute temperature (PTAT) current. The bandgap reference voltage generation circuit generates a second proportional to absolute temperature (PTAT) current whose positive temperature coefficient is different from the positive temperature coefficient of the first PTAT current. The current compensator is coupled to the PTAT current generator and the bandgap reference voltage generation circuit. The current compensator retrieves the first PTAT current and the second PTAT current, performs subtraction and addition on the first PTAT current and the second PTAT current to generate a compensation current, and transmits the compensation current to the bandgap reference voltage generation circuit to generate a zero temperature coefficient voltage.

Abstract: A phase-locked loop circuit includes a digital control oscillator, configured to generate an output clock signal according to at least one control code generated using at least one phase error signal; and a phase detector, configured to generate the at least one phase error signal according to a rising edge difference and a rising edge lead-lag relation between a rising edge of a first clock signal and a corresponding edge of an edge alignment corrected feedback signal; wherein the edge alignment corrected feedback signal is generated based on the output clock signal.

Abstract: A method of handling a backlight of a display panel includes steps of: receiving a first part of a first frame of image data; receiving a second part of the first frame of image data; and calculating a first backlight data corresponding to the first part of the first frame of image data when receiving the second part of the first frame of image data.

Abstract: Provided is a touch driving integrated circuit (IC), an operation method thereof, and a touch device. The touch driving IC is used to drive a touch panel. The touch driving IC includes a touch interface circuit and an operation circuit. The touch interface circuit is coupled to the touch panel. The touch interface circuit communicates with an active stylus. The operation circuit is coupled to the touch interface circuit. In response to a stylus tip or a stylus tail of the active stylus touching the touch panel, the operation circuit determines a touch position of the active stylus. Based on stylus gesture information, the operation circuit determines whether to perform an eraser operation or a writing operation. The stylus gesture information includes a relative tilt angle between a tilt angle of the active stylus and a tilt angle of the touch panel.

Abstract: A first driver circuit is couplable to at least one second driver circuit. Each of the first/second driver circuits has a first terminal and a second terminal. The first terminal of each driver circuit is commonly coupled to a first transmission bus, and the second terminal of each driver circuit is commonly coupled to a second transmission bus. The first driver circuit outputs a first synchronization signal to the first transmission bus through the first terminal, receives a second synchronization signal from the second transmission bus through the second terminal wherein the second synchronization signal is output by one of the second driver circuit at the time when this second driver circuit receives the first synchronization signal, and calculates a compensation time corresponding to this second driver circuit according to an output time point of the first synchronization signal and a reception time point of the second synchronization signal.

Abstract: A power converter includes an input, an output, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, and a sixth switch. The first switch and the second switch are coupled between the input and a reference voltage. The third switch is coupled between a first capacitor and the fourth switch. The first capacitor is coupled to the reference voltage. The fourth switch is coupled between the output and the third switch. A terminal of a second capacitor is coupled between the third switch and the fourth switch, and another terminal of the second capacitor is coupled between the first switch and the second switch through an inductor. The fifth switch is coupled between the reference voltage and the common node of the inductor and the second capacitor. The sixth switch is coupled between the common node and the first capacitor.

Abstract: A driver circuit including a buffer circuit and at least one charge and discharge circuit is provided. The buffer circuit is coupled to a first resistor string and a digital-to-analog converter via a trace. The buffer circuit is configured to output an input voltage to the first resistor string via the trace. The trace is coupled between the buffer circuit and the digital-to-analog converter. The charge and discharge circuit is coupled to the buffer circuit via the trace. The charge and discharge circuit is configured to charge or discharge the trace according to a first control signal.

Abstract: A touch detection device includes a control circuit. The control circuit is configured to: detect whether at least one zone of a touch panel is touched according to a plurality of touch sensing values corresponding to a plurality of touch sensing electrodes of the touch panel; and, to each of the at least one touched zone, determine the touched zone is caused by a finger touch or a liquid touch according a solar energy conversion efficiency value, wherein the solar energy conversion efficiency value represents how much solar energy is converted to electricity.