Abstract: A gate driver includes a gate driving main circuit and a power sequence control circuit. The gate driving main circuit disposed between an operating voltage and ground is coupled to a first gate voltage and a second gate voltage. The operating voltage is higher than ground and first gate voltage is higher than second gate voltage. The power sequence control circuit includes first-type transistors, a second-type transistor, a transistor and a judging circuit. The first-type transistors are coupled in series between first gate voltage and a first node and their gates are coupled to a second node. The second-type transistor is coupled between first node and second gate voltage and its gate is coupled to second node. The transistor is coupled between first gate voltage and gate driving main circuit and its gate is coupled to first node. The judging circuit generates an output signal to second node.

Abstract: A power on reset circuit applied to a gate driver of a display apparatus is disclosed. The power on reset circuit is coupled between an operating voltage and a ground terminal. The power on reset circuit includes an output terminal, a first transistor, a second transistor, a resistor, and a buffer circuit. The first transistor is coupled between the operating voltage and a first node. A gate of first transistor is coupled to the first node. The second transistor is coupled between the operating voltage and the first node. A gate of second transistor is coupled to the ground terminal. The resistor is coupled between the first node and ground terminal. The buffer circuit is coupled between the first node and output terminal and outputs a reset signal through the output terminal. A second threshold voltage of second transistor is larger than a first threshold voltage of first transistor.

Abstract: A gate driver includes a gate driving main circuit and a power sequence control circuit. The gate driving main circuit disposed between an operating voltage and ground is coupled to a first gate voltage and a second gate voltage. The operating voltage is higher than ground and first gate voltage is higher than second gate voltage. The power sequence control circuit includes first-type transistors, a second-type transistor, a transistor and a judging circuit. The first-type transistors are coupled in series between first gate voltage and a first node and their gates are coupled to a second node. The second-type transistor is coupled between first node and second gate voltage and its gate is coupled to second node. The transistor is coupled between first gate voltage and gate driving main circuit and its gate is coupled to first node. The judging circuit generates an output signal to second node.

Abstract: A power on reset circuit applied to a gate driver of a display apparatus is disclosed. The power on reset circuit is coupled between an operating voltage and a ground terminal. The power on reset circuit includes an output terminal, a first transistor, a second transistor, a resistor, and a buffer circuit. The first transistor is coupled between the operating voltage and a first node. A gate of first transistor is coupled to the first node. The second transistor is coupled between the operating voltage and the first node. A gate of second transistor is coupled to the ground terminal. The resistor is coupled between the first node and ground terminal. The buffer circuit is coupled between the first node and output terminal and outputs a reset signal through the output terminal. A second threshold voltage of second transistor is larger than a first threshold voltage of first transistor.

Abstract: A level shifter applied in a driving circuit of a display is disclosed. The level shifter includes a first stage of level shifting unit and a second stage of level shifting unit and used to convert an input voltage signal with low voltage level into an output voltage signal with high voltage level. In one example, the total number of the transistors needed by the level shifter is much fewer than that of the prior art, and additional voltage sources are not needed to provide middle voltages. The manufacturing cost of the exemplary level shifter can be reduced and the signal level shifting efficiency of multi-power domain can be enhanced.

Abstract: A source driver pre-charging apparatus including a data detection module, a determining module, and a pre-charging module is disclosed. The data detection module captures a first most significant bit having N bits in a current data and a second most significant bit having N bits in a former data and compares them to generate a compared result. N is a positive integer larger than or equal to 2. The determining module judges whether any data is transited from a first grey-level region to a second grey-level region between the former data and the current data and at least one other grey-level region is existed between the first grey-level region and the second grey-level region. If the judgment result of the determining module is yes, the pre-charging module performs a pre-charging action on an output voltage of a source driver.

Abstract: A level shifter applied in a driving circuit of a display is disclosed. The level shifter includes a first stage of level shifting unit and a second stage of level shifting unit and used to convert an input voltage signal with low voltage level into an output voltage signal with high voltage level. In one example, the total number of the transistors needed by the level shifter is much fewer than that of the prior art, and additional voltage sources are not needed to provide middle voltages. The manufacturing cost of the exemplary level shifter can be reduced and the signal level shifting efficiency of multi-power domain can be enhanced.

Abstract: A source driver pre-charging apparatus including a data detection module, a determining module, and a pre-charging module is disclosed. The data detection module captures a first most significant bit having N bits in a current data and a second most significant bit having N bits in a former data and compares them to generate a compared result. N is a positive integer larger than or equal to 2. The determining module judges whether any data is transited from a first grey-level region to a second grey-level region between the former data and the current data and at least one other grey-level region is existed between the first grey-level region and the second grey-level region. If the judgment result of the determining module is yes, the pre-charging module performs a pre-charging action on an output voltage of a source driver.

Abstract: A driving apparatus applied in a liquid crystal display are disclosed. Its first channel includes a first latching module, a first level-shifting module, a P-type digital/analog converting module, a first R2R module, and a P-type amplifying module, the second channel includes a second latching module, a second level-shifting module, a N-type digital/analog converting module, a second R2R module, and a N-type amplifying module. The P-type digital/analog converting module and N-type digital/analog converting module are selectively coupled to the first R2R module or the second R2R module. The first latching module receives a first digital signal and the first latching module outputs a first analog signal corresponding to the first digital signal. The second latching module receives a second digital signal and the second latching module outputs a second analog signal corresponding to the second digital signal.

Abstract: A driving apparatus applied in a liquid crystal display are disclosed. Its first channel includes a first latching module, a first level-shifting module, a P-type digital/analog converting module, and a first R2R module, the second channel includes a second latching module, a second level-shifting module, a N-type digital/analog converting module, and a second R2R module. The P-type digital/analog converting module and N-type digital/analog converting module are selectively coupled to the first R2R module or the second R2R module. The first latching module receives a first digital signal and the first latching module outputs a first analog signal corresponding to the first digital signal. The second latching module receives a second digital signal and the second latching module outputs a second analog signal corresponding to the second digital signal.

Abstract: The present invention discloses a display device and its source driver comprising a plurality of data lines, a selection module, and a plurality of channel groups. The selection module receives a plurality of first data signals from the data lines, rearranges the first data signals in a first mode or a second mode according to a mode control signal, and outputs a plurality of second data signals accordingly. The channel groups transmit the second data signals outputted by the selection module, and each channel group has a first channel unit and a second channel unit. The first channel unit and the second channel unit of any of the channel groups respectively receives the different second data signals in the first mode, and the first channel unit and the second channel unit of any of the channel groups respectively receives the same second data signal in the second mode.

Abstract: A sensor pixel and a touch panel using the same are provided herein, wherein the touch panel has m scan lines and n readout lines. The sensor pixel includes a sensing capacitor, a readout transistor, a reset transistor, a base transistor, and a photo transistor. The photo transistor included in the sensor pixel produces a photo leakage current when it is exposed to a light. The light obstruction characteristic of the photo transistor is utilized to detect the locations of the touched sensor pixels. By proper timing control, the present invention not only can be applied to the multi-finger detection, but also is easy to be implemented.

Abstract: A circuit for resetting a display having at least one driver outputting a driving voltage through an output channel to a corresponding data line of a panel comprises a first switch and a second switch. The first switch is actuated by a control pulse to transfer a reset voltage to the data line of the panel. The second switch is actuated by the control pulse to electrically isolate the output channel of the driver from the data line of the panel, wherein the control pulse is asserted during transient periods resulting from power-on and power-off of the display.

Abstract: A reset circuit and a delay circuit are provided. The delay circuit includes a first resistor module, a second resistor module, a switch module and a capacitor module. First terminals of the first and the second resistor modules are coupled respectively to a first voltage and a second voltage. The switch module have a control terminal served as a input terminal of the delay circuit, a first terminal served as a output terminal of the delay circuit, a second terminal coupled to a second terminal of the first resistor module, and a third terminal coupled to a second terminal of the second resistor module. In the delay circuit, the first terminal selectively connected to the second terminal or the third terminal in accordance with the control terminal. The capacitor module couples between the first terminal of the switch module and the second voltage.

Abstract: A readout apparatus and a multi-channel readout apparatus for a touch panel are provided to integrate different types of readout circuit. The readout apparatus set to a first mode reads the touch panel with a small amount of charges through an integrator. The readout apparatus set to a second mode reads a sensing current of a current type touch panel through a current to voltage converting unit and an inverting amplifier, so as to save a chip area. The multi-channel readout apparatus set to a third mode applies multiple channels to alternatively share an integrator to read the touch panel with a large amount of charges, so that an amount of feedback capacitors (integral capacitors) having a great area can be greatly reduced. Therefore, readout apparatus of the present invention can not only reduce a chip area, but can also be applied to various types of the touch panel.

Abstract: A pixel driver includes an image signal module, a data latch module, a level shifter module, and a format conversion module, wherein the format conversion module includes at least one first conversion unit and a second conversion unit. The data latch module stores the digital signal generated by the image signal module temporarily and then transmits the digital signal to the level shifter module. The level shifter module increases the voltage of the digital signal and then transmits the digital signal to the format conversion module, wherein the conversion units generate analogue signals based on the digital signal received to drive different pixel units.

Abstract: A readout apparatus for a current type touch panel is provided. The readout apparatus includes a current-to-voltage converter, a voltage gain unit and an analog-to-digital converter (ADC). The current-to-voltage converter converts a sensing current of the current type touch panel to a sensing voltage. The current-to-voltage converter includes a resistor and a current mirror. The resistor has a first end and a second end. The current mirror has a master current end and a slave current end. An input end of the voltage gain unit is coupled to an output end of the current-to-voltage converter for receiving the sensing voltage. An input end of the ADC is coupled to an output end of the voltage gain unit. An output end of the ADC generates a digital code.

Abstract: A control circuit for a start-up circuit that induces current flow in a bandgap circuit during a start-up phase is disclosed. A comparator passes a power supply to the start-up circuit according to an internal node of the bandgap circuit after the start-up phase. An activating circuit is used to activate the comparator to obtain the power supply at an output earlier than another output node of the comparator.

Abstract: A multi-channel integrator is provided. The multi-channel integrator includes an integrator and a plurality of channels. Each of the channels includes an input selector and a unit-gain amplifier. The input selector has a common terminal, a first selecting terminal and a second selecting terminal. The input selector selectively electrically connects the common terminal to the first selecting terminal or to the second selecting terminal. The first selecting terminal of the input selector is coupled to an input terminal of the integrator. An input terminal of the unit-gain amplifier is coupled to the second selecting terminal of the input selector.

Abstract: A system of driving a touch screen comprises a touch sensitive panel including a plurality of first sensor lines parallel to a first direction and a plurality of second sensor lines parallel to a second direction, a driving circuit coupled with the first sensor lines, a first sensing circuit, and a controller coupled with the first sensing circuit. The driving circuit is configured to sequentially apply a first scanning signal through each of the first sensor lines. The first sensing circuit can report a plurality of first response signals that are transmitted through the second sensor lines in response to each applied first scanning signal. The controller can identify one or more touch location based on the first response signals reported by the first sensing circuit, and track each identified touch location. In other embodiments, methods of driving a touch screen are also described.