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: 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 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: 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 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.

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: An equalizer circuit including a first summing circuit, a second summing circuit, a first sampler circuit, a second sampler circuit, and a multiplexer is provided. The first sampler circuit generates a first sampled signal which is weighted to generate a second feedback signal. The second sampler circuit generates a second sampled signal which is weighted to generate a first feedback signal. The multiplexer generates a polarity indication signal based on one of the first sampled signal and the second sampled signal. The equalizer circuit performs a first calibration operation to compensate for a first offset voltage of the equalizer circuit based on a preset threshold voltage, and performs a second calibration operation to compensate for a second offset voltage of the equalizer circuit based on the weight value used for generating the first feedback signal, the weight value used for generating the second feedback signal, and the polarity indication signal.

Abstract: Analog front-end (AFE) circuit of display receiver includes input pad, voltage detecting circuit, and switching circuit. The input pad may receive input signal of low power mode of Mobile Industry Processor Interface (MIPI) standard and input signal of high-speed mode of MIPI standard. Since voltage level of input signal of different modes are different, the voltage detecting circuit is configured to receive the input signal and generate control signal according to a voltage level of the input signal. The switching circuit is coupled to the voltage detecting circuit and between the input pad and the equalizer circuit. The switching circuit is configured to receive the input signal, and determine whether to pass the input signal from the input pad to the equalizer circuit according to the control signal, wherein the control signal includes two different voltage levels that are respectively corresponding to a high-speed mode and a low power mode.

Abstract: A driver device configured to drive a display panel to display images is provided. The driver device includes a storage circuit, a processor circuit, and a source driving circuit. The storage circuit stores image processing parameters. The processor circuit receives an input frame data and a selecting signal indicating a first subpixel rendering (SPR) format that the input frame data is in. The processor circuit processes the input frame data according to a part of the image processing parameters which is selected according to the selecting signal, to generate the output frame data. The source driving circuit receives a first frame data in a subpixel arrangement format from the processor circuit, and generates data voltages according to the first frame data to drive subpixels of the display panel. The subpixels of the display panel are arranged in the subpixel arrangement format.

Abstract: A detection circuit includes an input circuit and a sensing circuit. The input circuit includes a first input node and a second input node. The first input node is coupled to a first detection node and the second input node is coupled to a second detection node. The sensing circuit includes a current source providing a predetermined current. The current source is coupled to the first input node. The sensing circuit generates a sensing voltage at an output node in response to the predetermined current. The first detection node directly contacts the second detection node or is electrically connected to the second detection node through a trace, and the sensing voltage is related to an impedance between the first detection node and the second detection node.

Abstract: A display driver chip for a flexible display includes a display control circuit and a crease compensation circuit. The display control circuit is coupled to a display panel of the flexible display and configured to provide a driving signal to a corresponding pixel of the display panel. The crease compensation circuit is coupled to the display control circuit and configured to execute a color deviation compensation method. The color deviation compensation method includes obtaining a folding angle of a folding portion of the flexible display; determining a color deviation compensation value for a sub-pixel of the pixel according to the folding angle; and adjusting a sub-pixel value of the sub-pixel according to the color deviation compensation value.

Abstract: A ramp generator includes a digital-to-analog converter, a first capacitor, a second capacitor and a noise cancellation circuit. The digital-to-analog converter is configured to generate a ramp-up voltage signal on a first output terminal and a ramp-down voltage signal on a second output terminal. The first capacitor is coupled between the first output terminal and an intermediate node. The second capacitor is coupled between the second output terminal and the intermediate node. The noise cancellation circuit is coupled with the intermediate node. The noise cancellation circuit is configured to provide a compensation feedback according to an intermediate voltage on the intermediate node.

Abstract: A display device includes a display panel and a control circuit. The display panel includes a plurality of pixel driving circuits. Each pixel driving circuit includes a light emitting element and a switching element. The switching element controls a driving current flowing through the light emitting element. The control circuit is coupled to the display panel. The control circuit provides a control signal for controlling the switching element. The control signal includes multiple pulses during each frame period. The control circuit adjusts a width ratio of a first level and a second level of the pulses according to at least one of the refresh rate and the brightness of the display panel.

Abstract: A touch device includes a touch panel and a touch control circuit. A method of controlling touch sensitivity of the touch device includes the touch control circuit determining a location of a touch event on the touch panel, the touch control circuit defining a first area on the touch panel based on the location of the touch event, the location of the touch event being in the first area, and the touch control circuit reducing touch sensitivity of a second area on the touch panel outside the first area.

Abstract: An image processing method is proposed. The method includes to receive an I frame and generate a coordinate I-list corresponding to a first detected object in the I-frame and including a first coordinate candidate set having four coordinates, receive a P-frame following the I-frame and generate a coordinate P-list corresponding to a second detected object in the P-frame and including a second coordinate candidate set having four coordinates, generate at least one object region and an initial motion vector thereof of an interpolated frame between the I-frame and the P-frame based on the coordinate I-list and the coordinate P-list, and correct the initial motion vector to generate a corrected motion vector of the at least one object region of the interpolated frame.

Abstract: A method for a display driver circuit, which has a first non-refresh period and a first refresh period in a first time period and has a second non-refresh period and a second refresh period in a second time period, includes steps of: receiving, by the display driver circuit, a setting data in the second non-refresh period; and performing, by the display driver circuit, an image processing operation by using the setting data. The second non-refresh period is longer than the first non-refresh period.

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.

Abstract: A driving system includes a plurality of driver circuits connected in series, wherein each of the plurality of driver circuits is connected to one or two adjacent driver circuits through a master terminal and a slave terminal. The plurality of driver circuits include a first driver circuit and a second driver circuit. The first driver circuit outputs a first synchronization signal through the master terminal. The second driver circuit outputs a second synchronization signal through the slave terminal when receiving the first synchronization signal through the master terminal. A compensation time corresponding to the second driver circuit is calculated according to an output time point of the first synchronization signal and a reception time point of the second synchronization signal.