Abstract: A method for detecting presence of an interference source is to be performed by a touch sensing system that stores a threshold capacitance difference. The method includes the steps of sampling capacitances periodically within a time period for obtaining a base capacitance value; sensing a comparison capacitance after the time period; computing an absolute difference between the comparison capacitance and the base capacitance value; and determining that the interference source is present when the comparison capacitance is smaller than the base capacitance value and the absolute difference is greater than the threshold capacitance difference.

Abstract: A touch and proximity sensing device includes a circuit board and a sensed signal processing unit including only one sensed signal conversion engine. The circuit board includes a capacitor sensing electrode and a grounding conductor foil disposed on opposite surfaces of the circuit board, and has a proximity sensing electrode formed thereon. The grounding conductor foil is spaced apart from the proximity sensing electrode in a planar direction parallel to the surfaces of the circuit board. The sensed signal conversion engine is spaced apart from the capacitor sensing electrode and the proximity sensing electrode in the planar direction and detects electric sensed signals from the capacitor sensing electrode and the proximity sensing electrode.

Abstract: A method for detecting presence of an interference source is to be performed by a touch sensing system that stores a threshold capacitance difference. The method includes the steps of sampling capacitances periodically within a time period for obtaining a base capacitance value; sensing a comparison capacitance after the time period; computing an absolute difference between the comparison capacitance and the base capacitance value; and determining that the interference source is present when the comparison capacitance is smaller than the base capacitance value and the absolute difference is greater than the threshold capacitance difference.

Abstract: A touch and proximity sensing device includes a circuit board and a sensed signal processing unit including only one sensed signal conversion engine. The circuit board includes a capacitor sensing electrode and a grounding conductor foil disposed on opposite surfaces of the circuit board, and has a proximity sensing electrode formed thereon. The grounding conductor foil is spaced apart from the proximity sensing electrode in a planar direction parallel to the surfaces of the circuit board. The sensed signal conversion engine is spaced apart from the capacitor sensing electrode and the proximity sensing electrode in the planar direction and detects electric sensed signals from the capacitor sensing electrode and the proximity sensing electrode.

Abstract: A circuit for detecting faulty diode is disclosed, wherein the circuit for detecting faulty diode comprises a diode having an anode connecting to a voltage supply; a first switch having a first end connected to a cathode of the diode; a testing current source connected to the second end of the first switch; a one-shot circuit connected to a control end of the first switch, by which an output signal is generated and transmitted to the control end; and a comparator connected to a reference voltage input terminal for receiving a reference voltage and connected to the second end of the first switch. When the one-shot circuit closes the first switch for a maintaining period to urge the comparator comparing the reference voltage with the voltage applied to the second end of the first switch, whereby a signal used to discriminate whether the diode is fail or not is generated.

Abstract: A LED display system includes a display controller including an output port having a first output terminal and a second output terminal; a plurality of LED sets; and a plurality of driving circuits, coupled in series and coupled between the display controller and the plurality of LED sets, respectively. Each of the driving circuits includes a first signal-input terminal, a first signal-output terminal, a second signal-input terminal, and a second signal-output terminal, wherein the first signal-input terminal of a first one of the driving circuits is coupled to the first output terminal, the second signal-input terminal of the first one of the driving circuits is coupled to the second output terminal. The display controller asserts a transition period for switching the driving circuits from a first operation mode to a second operation mode by manipulating a first signal outputted to the driving circuits through the first output terminal.

Abstract: A LED display system includes a display controller includes an output/input port; a plurality of driving circuits coupled in series, wherein a first one of the driving circuits is coupled to the output/input port; and a plurality of LED sets respectively coupled to the plurality of driving circuits. A plurality of image data, outputted from the display controller, are shifted to the plurality of driving circuits, respectively, in a first direction through the first one of the driving circuits when the display controller is in a displaying mode; and a plurality of status data, respectively generated by the plurality of driving circuits, are shifted to the display controller in a second direction through the first one of the driving circuits when the display controller is in a detecting mode.

Abstract: A circuit for detecting faulty diode comprises a diode having an anode connected to a voltage supply; a resistor having a first end connected to a cathode of the diode; a transistor having a drain connected to a second end of the resistor and a source that is grounded; a differential amplifier having a positive terminal connected to the drain of the transistor, a negative terminal connected to a reference voltage input terminal for receiving a reference voltage, and an output terminal connected to a gate of the transistor; and a buffer having an input terminal connected to the gate of the transistor, and a signal output terminal used to output a faulty signal.

Abstract: A circuit for detecting faulty diode is disclosed, wherein the circuit for detecting faulty diode comprises a diode having an anode connecting to a voltage supply; a first switch having a first end connected to a cathode of the diode; a testing current source connected to the second end of the first switch; a one-shot circuit connected to a control end of the first switch, by which an output signal is generated and transmitted to the control end; and a comparator connected to a reference voltage input terminal for receiving a reference voltage and connected to the second end of the first switch. When the one-shot circuit closes the first switch for a maintaining period to urge the comparator comparing the reference voltage with the voltage applied to the second end of the first switch, whereby a signal used to discriminate whether the diode is fail or not is generated.

Abstract: A compensation circuit for current control oscillator to correct the frequency curve of an oscillator includes a compensation circuit which has a plurality of P transistors and N transistors to improve stabilization of output frequency of the digital current control oscillator and to prevent the digital current control oscillator from occurring unlatching phenomenon in certain frequency zones.

Abstract: An electronic album includes a control chip in a computer monitor to couple the existing computer monitor with a general conventional image storage media device used in general digital cameras to directly display images stored in the image storage media device on the screen to achieve objects and functions of economy, simplicity, convenience and portability.

Abstract: A apparatus for controlling in-system programming for repairing a malfunctioned programmable element in an electronic device without disassembling the casing or replacing a new element chip includes an apparatus equipped with an in-system programming chip to connect the programmable element that has faulty program codes or data to another normal computer. By means of the apparatus of the invention, the program codes or data on the programmable element may be reprogrammed to fix the problems or defects of the programs to resume normal operation, and to speed up repairs and reduce waste of manpower.

Abstract: A compensation circuit for current control oscillator to correct the frequency curve of an oscillator includes a compensation circuit which has a plurality of P transistors and N transistors to improve stabilization of output frequency of the digital current control oscillator and to prevent the digital current control oscillator from occurring unlatching phenomenon in certain frequency zones.

Abstract: The invention adopts the virtual COM port instead of the traditional real COM port in a PC host for communicating with a micro-controller in target host. In the prior art, we need to communicate and transfer data between a host and the other one using real COM port and execute the program in the micro-controller. But the present invention uses the Virtual COM port in the PC host to replace the real one and connect to the real COM port of micro-controller in the other PC host. Then it achieves the purpose of programming in the same host including PC host and target host simultaneously.

Abstract: A control apparatus for a built-in keyboard in notebook computers includes an keyboard encoder which has a serial/parallel port interface to transmit a keyboard scan code to a keyboard controller and to receive commands from the keyboard controller. The keyboard controller is integrated in a core-logic chip set. The keyboard encoder also includes a series bus interface to download matrix value pre-stored in the core-logic chip set to the keyboard encoder.