Abstract: The present invention relates to a touch panel with a discharging function, which comprises a scanning bus, a sensing bus, a control unit, and a discharging circuit. The scanning bus is used for scanning a touch frame. The sensing bus interleaves with the scanning bus, and senses at least a touched location on the touch frame. The control unit is coupled to the scanning bus and the sensing bus 20? for controlling them. The discharging circuit is coupled to the sensing bus or/and the scanning bus, and is controlled by the control unit for releasing the charges at the touched location or/and on the relevant path between the touched location and the buses. Thereby, by using a discharging circuit for releasing charges on the parasitic capacitor, the parasitic capacitance effect is avoided. Hence, the sensing accuracy of the touch panel is increased.

Abstract: The present invention relates to a charge pump, which uses a chopper circuit or a clamp circuit coupled between a pump capacitor and an output capacitor for preventing a parasitic transistor produced by a switching mechanism from turning on. Thereby, the performance of the charge pump is improved effectively.

Abstract: The present invention relates to a driving circuit for a display panel, and comprises a switching module, a buffer circuit, and a plurality of resistive devices. The switching module is coupled to a first power supply and a second power supply. The voltage of the first power supply is smaller than that of the second power supply. The buffer circuit is coupled to the switching module, and is used for buffering a data signal and producing a buffer signal. The plurality of resistive devices is connected in series and coupled to the buffer circuit, and produces a plurality of driving signals between the plurality of resistive devices according to the buffer signal. The driving circuit switches between the first power supply and second power supply sequentially to supply power to the buffer circuit. Thereby, one of the plurality of driving signals charges a capacitor of the display panel for saving power of the driving circuit. Accordingly, the power of the display can be saved.

Abstract: The present invention relates to a driving circuit for a display panel, which comprises a pre-charge power supply, a pre-charge switch, a buffer circuit, and a plurality of resistive devices. The pre-charge switch is coupled between the pre-charge power supply and a capacitor of the display panel. The buffer circuit is used for buffering a data signal and producing a buffer signal. The plurality of resistive devices is connected in series and coupled to the buffer circuit, and produces a plurality of driving signals therebetween according to the buffer signal. The driving circuit first closes the pre-charge switch to make the pre-charge power supply charge the capacitor. Then, one of the plurality of driving signals charges the capacitor. Thereby, the driving time can be shortened, and power of the display can be saved by avoiding power consumption on resistors.

Abstract: In a closed-loop monitoring system, a host device is operable to output encoded signals at a coupling side to a single transmission line. Each of monitoring devices includes: a current inducting generating unit generating induced encoded signals when the encoded signals pass through a signal current generating element coupled across an input side coupled to the transmission line; a control unit identifying a monitoring signal from the induced encoded signals generated by the current inducting generating unit; and a detecting unit detecting, in response to the monitoring signal, whether each of electronic devices coupled thereto is activated ox deactivated and transmitting a reply signal associated with states of the electronic devices to the transmission line based on a detection result made thereby. The host device receives the reply signal from each monitoring device through the transmission line and the coupling side to obtain state information associated with the electronic devices.

Abstract: The present invention relates to a charge pump capable of enhancing power efficiency and output voltage, which comprises a pump capacitor, a switching module, a first switch, a first buffer, a first switch, and an output capacitor. The switching module is coupled to a first terminal of the pump capacitor. The first switch is coupled between a second terminal of the pump capacitor and a supply voltage. The first buffer receives a first input signal and produces a control signal for controlling the first switch to turn on or cut off. The level of the first input signal ranges between a first voltage and a second voltage, wherein the first and the second voltages are related to the gate voltage of the first switch. The gate voltage of the first switch is a multiple, which is greater than one, of the supply voltage. Thereby, the impedance of the switch is reduced, and hence the power efficiency of the charge pump, the output voltage level, and the area efficiency of integrated circuits are improved.

Abstract: The present invention relates to a charge pump, which uses a chopper circuit or a clamp circuit coupled between a pump capacitor and an output capacitor for preventing a parasitic transistor produced by a switching mechanism from turning on. Thereby, the performance of the charge pump is improved effectively.

Abstract: A low power source driving device adopted for use on liquid crystal drivers includes a time series controlled digital circuit to generate different digital signal combinations and a dynamically regulated source driver bias circuit to regulate by stages bias currents of source drivers according to the digital signal combinations so that output can reach a Gamma potential while power consumption is reduced at the same time. Increasing the stage number of the bias currents can further reduce power consumption.

Abstract: The present invention relates to a charge pump capable of enhancing power efficiency and output voltage, which comprises a pump capacitor, a switching module, a first switch, a first buffer, a first switch, and an output capacitor. The switching module is coupled to a first terminal of the pump capacitor. The first switch is coupled between a second terminal of the pump capacitor and a supply voltage. The first buffer receives a first input signal and produces a control signal for controlling the first switch to turn on or cut off. The level of the first input signal ranges between a first voltage and a second voltage, wherein the first and the second voltages are related to the gate voltage of the first switch. The gate voltage of the first switch is a multiple, which is greater than one, of the supply voltage. Thereby, the impedance of the switch is reduced, and hence the power efficiency of the charge pump, the output voltage level, and the area efficiency of integrated circuits are improved.