Sharp Kabushiki Kaisha Corporation

Masashi Mayumi

Atsushi Aoki

Masayuki Hata

Daiji Kitagawa

Atsushi Okada

Yousuke Nakamura

Teruhisa Masui

A display device including a touch panel implements touch detection with sufficient accuracy without reducing the accuracy of a compensation process that uses an external compensation scheme. A plurality of sensor electrodes for touch detection are divided into a plurality of blocks such that each block corresponds to pixel circuits in a plurality of consecutive rows and pixel circuits in a plurality of consecutive columns. A cathode electrode is divided so as to correspond to the plurality of blocks, and each of the divided cathode electrodes is shared by a corresponding plurality of organic EL elements. A touch panel controller applies a touch driving signal to sensor electrodes belonging to a block different from a block corresponding to pixel circuits that are targets for a characteristic detection process, during a current measurement period included in a period during which the characteristic detection process is performed.

Display device equipped with touch panel and control method therefor

For a node in which a difference between a base sensor value which is a sensor value obtained at certain time intervals and a first reference value which is a sensor value obtained when an organic EL element does not emit light in normal temperature state is greater than a threshold value, a correction value calculation circuit stores the product of a base computing value and a third reference value as a correction value in a correction value storage unit, the third reference value representing a ratio of the first reference value to a second reference value which is a sensor value obtained when the organic EL element emits light in normal temperature state, and the base computing value being obtained by providing the product of the third reference value and the base sensor value as an input value to a base computing value calculation circuit.

Display device including touch panel and touch position identifying method

There is achieved an electronic device including a position detector that can detect a touch position with high accuracy even when thickness reduction proceeds. A touch position detection method includes: a first determination step (S) of determining whether or not negative-value data is included in mutual capacitance detection data; a second determination step (S) of determining whether or not a mutual capacitance detection region and a self-capacitance detection region overlap; a third determination step (S) of determining whether or not the maximum value of the absolute value of negative-value data and the area of a negative-value data region are equal to or greater than thresholds; a correction step (S) of correcting the mutual capacitance detection data on the basis of self-capacitance detection data; and a touch position specification step (S) of specifying a touch position on the basis of the mutual capacitance detection data after the correction.

Electronic device provided with position detector and touch position detection method

A position detection device includes a sensor driving unit driving a touch sensor by providing a drive signal of a sine-wave to the touch sensor and a position detecting unit detecting a position of a touch on the touch sensor. The position detecting unit includes a first detection processing unit performing a touch detection process using an amplitude modulation scheme during a first detection processing period and a second detection processing unit performing the touch detection process using a frequency modulation scheme during a second detection processing period. A position detection method includes a sensor driving step of driving the touch sensor and a position detecting step of detecting the position. The position detecting step includes a first detection processing step of performing the touch detection process using the amplitude modulation scheme and a second detection processing step of performing the touch detection process using the frequency modulation scheme.

Position detection device, electronic device equipped with same, and position detection method

A sensor-equipped display device includes a scanning driving unit () that repeats a scanning operation of selecting scanning lines (G) sequentially in a first direction, and a data driving unit () that applies a voltage to data lines (S). The display device further includes a detection control unit () that repeats a scanning operation of driving drive lines (DRL) sequentially in the first direction, and detects signals of detection lines (SNL). During a period that overlaps a period for the screen scanning operation with respect to the scanning lines, the detection control unit executes the screen scanning operation with respect to the drive lines, and in the screen scanning operation with respect to the drive lines, the detection control unit outputs the driving signal, avoiding the drive line in an area corresponding to the scanning line that is being selected by the scanning driving unit.

Sensor-equipped display device, control device, and control method

Disclosed is a touch panel comprising a display panel (for example, a liquid crystal panel) (); a plurality of mirrors () provided on an edge of a display surface side of the display panel (); a light source (); a plurality of light sensors () embedded in the display panel (), positioned immediately under the mirrors (), and for which light emitted from the light source () is guided by the mirrors (); and a data interpolation processing unit that, if an output signal from a certain light sensor included in the plurality of light sensors () is at most at a threshold, calculates interpolation data from output signals that are stronger than the threshold from light sensors about a periphery of the certain light sensor.

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Osaka, Japan

Masashi Mayumi