Abstract: A driving apparatus for driving a display panel including a connection pad, a selecting circuit, a data driving circuit and a detection circuit is provided. The selecting circuit is electrically connected to a data line of the display panel through the connection pad. The data driving circuit outputs a data voltage to a pixel circuit of the display panel through the selecting circuit and the connection pad in a display stage. The detection circuit provides a detection signal to a light-emitting element of the pixel circuit through the selecting circuit and the connection pad in a detection stage, and detects a resultant signal with respect to an electric characteristic of the light-emitting element of the pixel circuit in the detection stage.
Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals, the sensing channels are coupled to the sensing lines in an arrangement selected from one of a random arrangement and a normal arrangement. The driver further includes a signal convertor coupled to the sensing channels and configured to receive the sensing signals from the sensing channels in a sequence selected from one of a random sequence and a normal sequence.
Abstract: A driver of a display panel is provided. The driver includes a plurality of sensing channels and a signal convertor. The plurality of sensing channels are configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals. The signal convertor are coupled to the sensing channels and configured to receive the sensing signals from the sensing channels. The signal convertor receives the sensing signals from the sensing channels in different sequences during different sensing periods.
Abstract: The disclosure provides a trimming method, a trimming circuitry, and a trimming system for an IC with memory usage reduction. The method is applicable to a system including a tester, a characteristic adjustable circuit, and a trimming circuitry having a characteristic outputting circuit, a data memory, and a trim memory. The method includes the following steps. Under each condition, output signals respectively corresponding to trim settings are received from the characteristic adjustable circuit by the characteristic outputting circuit to obtain output values of the condition, a statistical parameter associated with the output values of the condition is calculated by the tester. The statistical parameter of at least one of the conditions is written into the data memory by the tester. An optimal trim setting of the characteristic adjustable circuit is determined according to the statistical parameters under all the conditions and written into the trim memory by the tester.
Abstract: An amplifier circuit including an input amplifier, an output amplifier and a diode device is provided. The output amplifier is coupled to the input amplifier and outputs an output voltage. The diode device is coupled between an output end and an input end of the output amplifier. When a voltage difference between the output end and the input end of the output amplifier is greater than a barrier voltage of the diode device, the diode device is turned on, and an overshoot of the output voltage is reduced.
January 17, 2019
May 16, 2019
Novatek Microelectronics Corp.
Chia-Wei Su, Ju-Lin Huang, Keko-Chun Liang
Abstract: A noise detection method including the following steps is provided. During different time periods, plural sets of driving signals are respectively transmitted to driving lines of the touch panel to drive sensing lines of the touch panel to generate plural sets of sensing signals. The plural sets of sensing signals are respectively received and calculated to obtain plural sets of summation signals. One set of summation signals includes first summation signals, and another set of summation signals includes second summation signals. A part or all of the first summation signals is replaced by the second summation signals. A signal value of a combination of the first and the second summation signals is calculated to obtain a summation thereof. The summation of the signal value of the combination is smaller than a summation of a signal values of the first summation signals before recombination.
Abstract: The invention provides a display panel driving circuit and a method for capturing error information thereof. The display panel driving circuit includes a driving circuit, a pixel circuit and a timing controller circuit. The method includes: obtaining LED error information indicating errors caused by an LED of the pixel circuit; driving the LED by the drive circuit to obtain LED and driving circuit error information; obtaining driving circuit error information according to the two error information. The timing controller circuit records the error information and compensates LED attenuation by using the error information.
Abstract: An apparatus and a method for sensing a display panel are provided. The apparatus includes a source driving circuit and a sensing circuit. The source driving circuit is coupled to data lines to drive the pixel circuits according to a display period comprising frame periods. The sensing circuit is coupled to a plurality of pixel circuits. The sensing circuit senses characteristics of the pixel circuits in the test data periods of the display period. The test data periods are periodically arranged in the display period. In each of the test data periods, a corresponding pixel circuit receives test data, and the sensing circuit senses the electrical characteristic of the corresponding pixel circuit. In the scan-line periods of each of the frame periods, the corresponding pixel circuit receives display data from a corresponding data line, and the sensing circuit does not sense the corresponding pixel circuit.
Abstract: A display device includes a plurality of sub-pixel arrays and each of sub-pixel arrays includes a plurality of first sub-pixels having a first color and forming a plurality of vertexes of a virtual quadrilateral, wherein there is not any other first sub-pixels having the first color located in the virtual quadrilateral; at least one second sub-pixel, having a second color different from the first color and located in the virtual quadrilateral; and at least one third sub-pixel, having a third color different from the first color and the second color and located in the virtual quadrilateral.
Abstract: An amplifier circuit includes an input stage, having a positive input end and a negative a negative input end, for generating a pair of differential signals according to a first input voltage received from the positive input end and a second input voltage received from a negative input end; an output stage, coupled to the input stage for generating an output voltage at an output end according to the pair of differential signals; a feedback stage, coupled between the output end and the negative input end; and a clamping unit, coupled between the positive input end and the negative input end for adjusting the second input voltage when the first input voltage is varied so as to clamp a voltage difference between the first input voltage and second input voltage.
Abstract: A display panel including a plurality of pixel units, a plurality of source lines, a plurality of gate lines and a plurality of common electrode lines is provided. The pixels units are arranged in array. The array includes a plurality of columns and a plurality of rows. The source lines are respectively coupled with the pixel units disposed in a same column of the columns. The gate lines are respectively coupled with the pixel units disposed in a same row of the rows. The common electrode lines and gate lines extend parallelly with each other. At least one of the source date lines, the gate lines and the common electrode lines has the line widths varied along the extension direction thereof.
Abstract: An integrated circuit for driving a display panel is provided. The integrated circuit includes a gamma mapping circuit and a mura compensation circuit. The gamma mapping circuit is configured to receive a gray level of an image data, map the gray level to a gamma code according to at least one gamma table, and output the gamma code. The mura compensation circuit is configured to receive the gamma code, and compensate the gamma code according to at least one de-mura table to generate a compensation result after the gamma mapping circuit performs the step of mapping the gray level to the gamma code. The integrated circuit drives the display panel according to the compensation result. In addition, a method for driving a display panel is also provided.
February 8, 2018
Date of Patent:
May 7, 2019
Novatek Microelectronics Corp.
I-Te Liu, Chia-Wei Chang, Chien-Yu Chen, Hsien-Wen Lo
Abstract: An apparatus for motion compensated noise reduction for input images is provided. The motion estimation and motion compensation circuit performs a motion estimation operation and a motion compensation operation on a current image and a previous image to obtain a first patch. The block matching operation circuit performs a block matching operation on the current image and the previous image to obtain a second patch. The motion detection circuit performs a motion detection operation on a target patch according to the first patch and the second patch to output a set of third patches. The current image includes the target patch. The noise reduction circuit performs a noise reduction operation on the set of third patches according to a threshold curve, so as to generate the target patch that the noise is reduced. A method for motion compensated noise reduction for input images is also provided.
Abstract: The disclosure provides a sensing apparatus and an operation method thereof. The sensing apparatus includes a sensing circuit, an analog-to-digital converter (ADC) circuit, a disturbing circuit and an output circuit. The sensing circuit is configured to output a sensing signal indicating a sensing result of a sensing line of the display panel. The ADC circuit is coupled to the sensing circuit to receive the sensing signal and outputs sensing data related to the sensing signal. The disturbing circuit is coupled to the ADC circuit to receive the sensing data and generates a time-variant disturbance component to disturb the sensing data to generate disturbed data. The output circuit is coupled to the disturbing circuit to receive the disturbed data.
Abstract: An image processing method and an image processing apparatus that utilize scrolling text information and moving edge-pairs of an edge map to determine text regions in interpolated frame is introduced herein. Text blocks are detected according to the moving edges-pair of the edge map. Next, a first moving vector histogram and a second moving vector histogram are built according to the detected text blocks. An existence of scrolling text and motion vector of the scrolling text in the frames are determined according to the first and second moving vector histograms. A scrolling text region in at least one of the first frame and the second frame is determined in block line unit, and positions of each scrolling text pixels in an interpolated are determined according to the motion vector of the scrolling text and the scrolling text region in the at least one of the first frame and the second frame.
Abstract: An electronic device for driving a display panel and an operation method thereof are provided. The electronic device includes a sensing circuit, a dummy sensing circuit, a multiplexer circuit and a processing circuit. The sensing circuit senses a sensing line of the display panel to output a sensing result. The dummy sensing circuit senses a dummy signal to output a dummy sensing result, wherein the dummy signal is related to a part of or all of signals of the sensing line. The multiplexer circuit time-divisionally outputs the dummy sensing result and the sensing result. The processing circuit is coupled to an output terminal of the multiplexer circuit to time-divisionally receive the dummy sensing result and the sensing result.
Abstract: An mage sensing apparatus includes a substrate, a sensor array and a first electrode structure. The sensor array has a plurality of sensing cells and is disposed on the substrate. The first electrode structure is disposed on the substrate, and is adjacent to a first side of the sensor array and extending along the first side of the sensor array. wherein, the first electrode structure is configured to receive a first compensation signal when a sensing operation is operating on a first plurality of sensing cells among the sensing cells of the sensor array.
Abstract: A readout circuit of a touch panel is provided. The readout circuit includes a charge modulator and a correlated double sampling demodulator. The charge modulator is configured to provide a driving current to charge or discharge a sensing electrode of the touch panel and generate a sensing voltage signal. The correlated double sampling demodulator is coupled to the charge modulator. The correlated double sampling demodulator is configured to sample the sensing voltage signal to obtain a voltage variation when a touch event happens. A method for driving the touch panel is also provided.
Abstract: An image sensing device including a plurality of pixel circuits arranged in an array and configured to sense images and temperatures is provided. Each of the pixel circuits includes a photo sensing device, a transmission gate transistor, a reset transistor and an output stage circuit. The first end of the transmission gate transistor is coupled to the first end of the photo sensing device. The second end of the photo sensing device is coupled to a first voltage or a second voltage. The first end of the reset transistor is coupled to a first power, a first current bias or a second current bias. The second end of the reset transistor is coupled to the second end of the transmission gate transistor. The input end of the output stage circuit is coupled to the second end of the reset transistor. The output end of the output stage circuit outputs a temperature sensing signal or an image sensing signal.
Abstract: A reference voltage generator includes a detecting voltage provider, a comparator, and a core circuit. The detecting voltage provider provides a detecting voltage with a first voltage level corresponding to a voltage coefficient. The comparator compares the first voltage level of the detecting voltage with a plurality of sampled amplitudes of an input signal to respectively generate a plurality of comparison results. The core circuit is used to: collect a plurality of first comparison results associated with a current received bit of a preset value from the comparison results; take the voltage coefficient as a first boundary voltage coefficient in response to the first comparison results satisfying a first condition; take the voltage coefficient as a second boundary voltage coefficient in response to the first comparison results satisfying a second condition. The reference circuit generates a reference voltage according to the first and second boundary voltage coefficients.