Abstract: A capacitance detection device of a capacitance system includes: a capacitance sensor electrode for detecting a capacitance; a power source for supplying charges to be charged in the capacitance sensor electrode; an electric charge storage capacitor in which an amount of charges to be charged therein changes according to the electric charges charged in the capacitance sensor electrode; and a switch for changing a reference potential of the electric charge storage capacitor. The reference potential of the electric charge storage capacitor is changed in a period of measuring the capacitance.

Abstract: A liquid crystal display device comprising: a plurality of data lines; a plurality of scanning lines; a plurality of source drivers that supply a data signal to the plurality of data lines; a gate driver that supplies a scanning signal to the plurality of scanning lines; and a display control circuit that controls the plurality of source drivers and the gate driver. The display control circuit includes an image determinator that determines whether an externally-input image includes a pattern image and a polarity signal generator that generates a polarity signal deciding a voltage polarity of the data signal in each source driver based on a determination result of the data signal. The polarity signal generator individually outputs each of the plurality of generated polarity signals to the corresponding source driver.

Abstract: A capacitance detection device of a capacitance system includes: a capacitance sensor electrode for detecting capacitance; a power source for supplying charges to be charged in the capacitance sensor electrode; an electric charge storage capacitor in which an amount of charges to be charged therein changes according to the electric charges charged in the capacitance sensor electrode; and a switch for changing a reference potential of the electric charge storage capacitor. The reference potential of the electric charge storage capacitor is changed in a period of measuring the capacitance.

Abstract: A capacitance detection device of a capacitance system includes: a capacitance sensor electrode for detecting a capacitance; a power source for supplying charges to be charged in the capacitance sensor electrode; an electric charge storage capacitor in which an amount of charges to be charged therein changes according to the electric charges charged in the capacitance sensor electrode; and a switch for changing a reference potential of the electric charge storage capacitor. The reference potential of the electric charge storage capacitor is changed in a period of measuring the capacitance.

Abstract: Provided is a touch-panel device capable of detecting a touched position with high accuracy even when a touched area extends off an electrode area. In one embodiment, the touched area is assumed to be, for example, circular in shape. A width in an X direction (overlap width) and a width in a Y direction (overlap width) of an overlap area where the touched area in a circular shape and an electrode area overlap each other is determined based on sensor measured values. When the overlap width and the overlap width are different from each other, it is judged that the touched area extends off the electrode area, and a position of a center of the touched area in the circular shape is calculated as the touched position.

Abstract: A static capacitance type touch panel, a control unit electrically connected with X and Y electrodes for detecting a touch position based on a measured value of a static capacitance between the X and Y electrodes. The control unit includes a predetermined touch threshold for detecting a peak, a near-peak range and a non-near-peak range, a first parameter for determining a value of the near peak range, and a second parameter for determining a value of the non-near-peak range. The first and second parameters are respectively predetermined for reduction of a noise influence from the measured value of the static capacitance between the X electrode and the Y electrode.

Abstract: A sensor apparatus for detecting contact or proximity of an object includes a calculation section for separating a plurality of points of the contact or the proximity that are generated simultaneously, and calculating individual sets of positional coordinates, and the calculation section includes an analysis section for determining, based on a spatial distribution of signal intensity obtained through detection, a condition for separating the spatial distribution of the signal intensity into a plurality of regions.

Abstract: A power semiconductor device includes first and second power semiconductor elements connected in parallel to each other and a drive control unit. The drive control unit turns on or off each of the first and second power semiconductor elements in response to an ON instruction and an OFF instruction repeatedly received from outside. Specifically, the drive control unit can switch between a case where the first and second power semiconductor elements are simultaneously turned on and a case where one of the first and second power semiconductor elements is turned on first and thereafter the other thereof is turned on, in response to the ON instruction. The drive control unit turns off one of the first and second power semiconductor elements first and thereafter turns off the other thereof, in response to the OFF instruction.

Abstract: Provided is a capacitance coupling type on-screen input image display device that enables multipoint detection in a short period of time. The on-screen input image display device includes: a detection circuit (4) for detecting a change in capacitance between the plurality of X coordinate electrodes and the plurality of Y coordinate electrodes of the touch sensor (3); a touch panel control circuit (6) for determining a touched coordinate point; and a main control circuit (7) for receiving touch coordinate data from the touch panel control circuit (6). The main control circuit (7) judges occurrence of a user's touch and coordinates of the occurrence from the touch coordinate data, and supplies a display signal corresponding to the judged coordinates to the display device (1) via the display control circuit (2), whereby the display signal is reflected on the display.

Abstract: A TFT element for ambient light detection and a TFT element for temperature detection are connected in series. In a first period, a first switch element is off, and a second switch element is at a hi side, so that a threshold voltage of the TFT element for temperature detection is detected. In a second period, a first switch element is on, and a second switch element is at a low side, so that temperature is detected. In a third period, a first switch element is on, and a second switch element is at a hi side, so that ambient light is detected. An input voltage and a control voltage to each of the TFT elements are set by a voltage controller provided in a drive circuit based on the threshold voltage.

Abstract: A static capacitance type touch panel, a control unit electrically connected with X and Y electrodes for detecting a touch position based on a measured value of a static capacitance between the X and Y electrodes. The control unit includes a predetermined touch threshold for detecting a peak, a near-peak range and a non-near-peak range, a first parameter for determining a value of the near peak range, and a second parameter for determining a value of the non-near-peak range. The first and second parameters are respectively predetermined for reduction of a noise influence from the measured value of the static capacitance between the X electrode and the Y electrode.

Abstract: In a touched position detection method for a touch panel for detecting a touched position, based on measured values by a plurality of sensors, presence of a touch is determined when a measured value by a sensor exceeds a touch threshold. As a touch threshold, a value which cannot be attained due to a mere noise but can due to presence of a touch is set. With respect to sensors located in the vicinity of a sensor showing a high measured value, a higher weighted value is applied to modify a measured value in a touched position calculation process than that to be applied to other sensors.

Abstract: The display device is provided with X electrodes XP and Y electrodes YP which cross with a first insulating layer in between and a number of Z electrodes which are electrically floating from each other with a second insulating layer in between. The Z electrodes are arranged so that each Z electrode overlaps both an adjacent X electrode and Y electrode. The pad portion of a first X electrode has such a form that the area is maximum in the vicinity of the fine wire portion of the first X electrode and the area is minimum in the vicinity of the fine wire portion of an adjacent second X electrode, and the area of the pad portion is smaller towards the direction in which the distance increases away from the vicinity of the fine wire portion of the first X electrode. A pulse signal is sequentially applied to one set of X electrodes or Y electrodes.

Abstract: An evaluation board for evaluating a power module including a power semiconductor device and a detecting unit for detecting characteristics of the power semiconductor device, comprises: a power source circuit supplying an electric power to the power module; a driving circuit driving the power semiconductor device; a display unit displaying a detected signal inputted from the detecting unit; and a substrate on which the power source circuit, the driving circuit, and the display unit are mounted.

Abstract: A power semiconductor device includes first and second power semiconductor elements connected in parallel to each other and a drive control unit. The drive control unit turns on or off each of the first and second power semiconductor elements in response to an ON instruction and an OFF instruction repeatedly received from outside. Specifically, the drive control unit can switch between a case where the first and second power semiconductor elements are simultaneously turned on and a case where one of the first and second power semiconductor elements is turned on first and thereafter the other thereof is turned on, in response to the ON instruction. The drive control unit turns off one of the first and second power semiconductor elements first and thereafter turns off the other thereof, in response to the OFF instruction.

Abstract: A detection resolution is improved in a display device that employs an electrostatic capacity coupling type touch panel provided with a transparent conductive film serving as a detection film. A plurality of electrode terminals (102) is provided such that at least three electrode terminals (102) are aligned in each side of a detection transparent conductive film (101). A touch panel control circuit is provided for selecting one of two to four numbers of electrode terminals from among the plurality of electrode terminals (102) of the detection transparent conductive film (101), applying an AC signal provided from a signal source (105) through a current detection resistor (r) (103), and then detecting a current that flows through each of the selected electrode terminals.

Abstract: Tonal data of one frame of a video signal is subject to time division into dark subframe tonal data at a low tone and bright subframe tonal data at a high tone to compensate for a lowered luminance in the dark subframe by the bright subframe so as not to change an integrated luminance per one ordinary frame. Subframe tonal data read from a memory is converted into output tonal data constituted of dark subframe tonal data at a low tone and bright subframe tonal data at a high tone, by four arithmetic calculation operations using calculation parameters supplied from a register.

Abstract: An interface circuit includes a detector to detect a particular pattern from a sequence of output data, a shift clock generator to change a cycle of a shift clock according to the detection result, a shift register section to change a data output width by the shift clock and output it as drive data, and an open-drain output section including an N-channel transistor driven by the drive data and a pull-up resistor. The detector detects a sequence where the current output data is “0” and the next output data is “1”, and the shift clock generator shortens and extends the cycles of the shift clock corresponding to “0” and “1”, respectively.

Abstract: A data driver circuit is divided into a low potential region, an intermediate potential region, and a high potential region, and relative withstand voltages in the respective regions are set equal to each other. Both of the transmission of a power source voltage to the high potential region from the low potential region and the transmission of video signals are performed via the intermediate potential region. Due to such a constitution, the withstand voltages in the respective regions can be suppressed to low values.

Abstract: A sensor apparatus for detecting contact or proximity of an object includes a calculation section for separating a plurality of points of the contact or the proximity that are generated simultaneously, and calculating individual sets of positional coordinates, and the calculation section includes an analysis section for determining, based on a spatial distribution of signal intensity obtained through detection, a condition for separating the spatial distribution of the signal intensity into a plurality of regions.