Abstract: A display panel driving and scanning system includes a timing controller to divide one frame period into first to third time periods. In the first time period, an image processing device calculates an overdriving signal for a current frame based on the current frame and a previous frame. In the second time period, the image processing device outputs the current frame, and a source driver charges the capacitors of the pixels in the liquid crystal display panel based on the current frame. In the third time period, the timing controller drives a backlight driving circuit to turn on a backlight source of the liquid crystal display panel for displaying the current frame.

Abstract: An in-cell multi-touch display panel system includes a multi-touch LCD panel and a touch display control subsystem. The multi-touch LCD panel has a TFT layer, a detection electrode layer, and a common-voltage and touch-driving layer. The detection electrode layer has M first conductor lines for performing touch detection by sampling touch detection from the M first conductor lines. The common-voltage and touch-driving layer has N second conductor lines for receiving common voltage in display and touch-driving signal in touch detection. In the detection electrode layer, there are pluralities of detection electrode areas in the intersections of first conductor lines and second conductor lines. Each detection electrode area is connected to a first conductor line by a touch-control transistor. The M×N touch-control transistors are divided in to N sets corresponding to N second conductor lines, respectively.

Abstract: A touch panel with a single-layer low-complexity transparent electrode pattern includes a substrate, N sensing electrodes, and M conductive traces. The N sensing electrodes and the M conductive traces are formed on the substrate, where N and M are each a positive integer. Each conductive trace has a specific impedance value and is connected with two sensing electrodes. Any one of the N sensing electrodes is connected with at least another one sensing electrode through at least one conductive trace, such that each sensing electrode has a different RC time constant. N driving signals with different frequencies are sequentially applied to the N sensing electrodes via one of the N sensing electrodes to measure capacitance changes of the N sensing electrodes for detecting one touched sensing electrode.

Abstract: A multi-touch system for controlling liquid crystal capacitors to reduce touch sensing interferences includes K gate driving lines, which are divided into N groups each corresponding to a common voltage conductive line. When a display driving signal is applied to an i-th group of gate driving lines for performing a display driving, the liquid crystal capacitor corresponding to the i-th group is set to a predetermined voltage, where i=1 to N. Finally, a touch driving signal is applied to an i-th common voltage conductive line corresponding to the i-th group for sensing touch points, so as to reduce touch sensing affections caused by noises of the liquid crystal display.

Abstract: An optimization system of real-time LCD white balance selection includes an RGB to YUV conversion unit, a white balance adjustment unit, and a YUV to RGB conversion unit. The RGB to YUV conversion unit receives an image signal and converts the image signal from RGB domain to YUV domain to generate a first YUV image signal. The white balance adjustment unit is connected to the RGB to YUV conversion unit for performing a white balance adjustment on the first YUV image signal and thus generating a second YUV image signal. The YUV to RGB conversion unit is connected to the white balance adjustment unit for converting the second YUV image signal from YUV domain to RGB domain.

Abstract: An in-cell multi-touch display panel system includes a touch LCD panel and a touch display control subsystem. The touch LCD panel has a TFT layer, a conductive electrode layer, and a common-voltage and touch-driving layer. The TFT layer has K gate driving lines and L source driving lines for a display operation. The conductive electrode layer has M first conduct lines for a touch detection operation by sampling a touch detection result from the M first conduct lines. The common-voltage and touch-driving layer has N second conduct lines for receiving a common voltage signal in display and receiving a touch-driving signal in touch detection. The K gate driving lines are divided into N groups respectively corresponding to the N second conduct line. When one group of gate driving lines has the display driving signal, the corresponding second conduct line is connected to the common voltage signal.

Abstract: An electronic device and a single-layer mutual-capacitance touch screen are provided. The touch screen includes multiple sensing electrode groups disposed in a first direction in parallel, multiple bonding pads, multiple first lead wires and multiple second lead wires. The sensing electrode group includes a first unit including multiple first electrodes and a second unit including multiple electrode pairs. The electrode pair includes a second electrode at a first side of the first unit and a third electrode at a second side of the first unit. The first lead wires and the second lead wires connect the first electrodes and the electrode pairs with corresponding bonding pads respectively. In any two adjacent electrode pairs, adjacent ends of both two second electrodes and two third electrodes are opposite to the first electrode in the first direction.

Abstract: An in-cell multi-touch panel system includes: an in-cell touch display panel, a touch display control system. In a first frame time interval, the touch display control system drives the in-cell touch display panel and samples the sensing voltage from the in-cell touch display panel to determine whether there is an approaching external object and noise interference. In a second frame time interval, the touch display control system finds out a frequency with minimum noise for use as a frequency of the touch driving signal when the noise interference exists. In a third frame time interval, the touch display control system is based on the frequency with minimum noise to correspondingly generate the touch driving signal so as to determine whether there is an approaching external object.

Abstract: A control system for a capacitive touch screen is provided. The control system comprises a touch detecting circuit, touch hard instruction, a storage module and a controller. The touch detecting circuit detects a capacitance variance to generate touch data. The touch hard instruction executes a touch computing function on the touch data. The storage module is connected to the touch detecting circuit and the at least one touch hard instruction, and records the touch data generated by the touch detecting circuit and the touch data computed by the touch hard instruction. The controller is connected to the touch detecting circuit, the at least one touch hard instruction, and the storage module, and assigns at least one touch task of a touch algorithm to the at least one touch hard instruction, so as to execute a corresponding touch computing function of the touch algorithm.

Abstract: A source driver with reduced number of latch devices includes a master latch device and at least one slave latch device. The master latch device has a first transmission gate, a first inverter, a second inverter, a first enable gate, and a second enable gate. The output of the second inverter is connected to the input of the first inverter. The at least one slave latch device has a second transmission gate, a third inverter, and a fourth inverter. When the first enable gate and the second enable gate receive a latch enable signal and a complementary latch enable signal respectively, the master latch device and the at least one slave latch device are concurrently driven to latch data.

Abstract: A method for improving linearity of touch system coordinates first reads two-dimensional raw data of a capacitive touch panel. Next, it reads a pixel and adjacent pixels of the pixel from the two-dimension raw data. Then, it determines whether the value of the pixel is great than a pre-determined threshold. If the value of the pixel is not greater than the pre-determined threshold, it then determines whether there is a value of the adjacent pixels is greater than the pre-determined threshold. If there is no value of the adjacent pixels greater than the pre-determined threshold, it sets the value of the pixel to a pre-determined value. Otherwise, it reserves the value of the pixel in order to increase the linearity of two-dimensional raw data so as to avoid the interference of noise to the two-dimensional raw data.

Abstract: In a method of skin tone optimization in a color gamut mapping system, an image signal is first transformed from a predetermined color domain to an HSV color domain for generating an HSV image signal. Next, a skin tone optimization is performed on the HSV image signal for generating an adjusted saturation gain. Then, a color enhancement is performed on the HSV image signal according to the adjusted saturation gain and a color shift signal so as to generate a color enhancement signal. Finally, the color enhancement signal is transformed from the HSV color domain to the predetermined color domain.

Abstract: In a sensing method using self-capacitance and mutual-capacitance alternatively to reduce touch noises, a control device configures a first driving and sensing device and a second driving and sensing device to perform an initialization. The control device configures the first and second driving and sensing devices to perform at least one self-capacitance sensing for producing a first possible touch point range during a first work mode. Then, the control device configures the first and second driving and sensing devices to perform at least one mutual-capacitance sensing for producing a second possible touch point range during a second work mode. The control device determines if there is range conjunction between the first and second possible touch point ranges. The control device produces a possible touch point range conjunction and calculates coordinates of touch points based on the possible touch point range conjunction.

Abstract: A source driving apparatus with power saving mechanism and a flat panel display using the same are provided. The source driving apparatus includes an output buffer stage and a power-saving circuit. The output buffer stage operates under a dual power, and has a positive and negative output channels respectively coupled to two adjacent data lines in a display panel. Moreover, the power-saving circuit is coupled between the output buffer stage and the display panel. The power-saving circuit collects charges from an equivalent load capacitor of each data line, before the output buffer stage drives the two adjacent data lines through the positive and negative output channels. The power-saving circuit charges one of a positive supply and a negative supply of the dual power in response to the collected charges, during the output buffer stage drives the two adjacent data lines through the positive and negative output channels.

Abstract: A decoder level shifter device includes a first decoder level shifter and a second decoder level shifter. The first decoder level shifter has first to fourth input terminals, first and second output terminals, first and second enable terminals, first and second reset terminals. The first to fourth input terminals receive first to second input signals and their complementary signals, respectively. The second decoder level shifter has fifth to eighth input terminals, third to fourth output terminals, and third and fourth enable terminals. The fifth to eighth input terminals receive the first and second input signals and their complementary signals, respectively. The first, second, third, and fourth enable terminals are connected to the fourth, third, second, and first output terminals, respectively.

Abstract: An operational amplifying device with auto-adjustment output impedance includes an operational amplifier and first to third signal paths. The operational amplifier has an output connected to its inverting input, and a non-inverting input for receiving an input signal. The first signal path has one end connected to the output of the operational amplifier and the other end connected to a first output node. The second signal path has one end connected to the output of the operational amplifier and the other end connected to the first output node. The third signal path has one end connected to the output of the operational amplifier and the other end connected to the first output node. The first signal path is normally on, and the second and third signal paths are normally off. The first signal path has high impedance, and each of the second and third signal paths has low impedance.

Abstract: In a method for increasing accuracy of touch coordinate calculation in a capacitive multi-touch system, it performs operations on obtained data for de-noising of the obtained data and increasing its linearity so as to generate data with excellent stability and linearity. An integral accumulation operation is performed to generate data for each sensing channel, cancel the accumulation error in data, and calculate coordinates for touch points on a capacitive touch panel.

Abstract: A noise reduction system includes a driving device, a sensing device, a first switch, a second switch, and a controller. The driving device has a plurality of drivers for generating touch driving signals. The sensing device has a plurality of sensors for detecting whether there is an external object approached and generating touch sensing signals. The first switch is provided for electrically connecting the plurality of drivers and the plurality of sensors to the capacitive touch panel. The second switch is provided for electrically connecting the plurality of drivers and the plurality of sensors to the capacitive touch panel. The controller configures the first switch and the second switch to perform a first direction driving and second direction sensing, and configuring the first switch and the second switch to perform a second direction driving and first direction sensing.