Abstract: An object of the present invention is to further reduce the power consumption of a display device adopting pause driving. In a display device that includes a display driving unit (30) that drives a display unit (400); and a power supply circuit (20) that generates a plurality of operation voltages to be supplied to the display driving unit (30), and performs pause driving that repeats a scanning period during which gate bus lines (GL) are scanned and a pause period during which the scanning of the gate bus lines (GL) is stopped, the display driving unit (30) provides a control signal (SM) indicating whether the current point in time is the scanning period or the pause period, to the power supply circuit (20), and the power supply circuit (20) makes the voltage value of at least one of the plurality of operation voltages supplied to the display driving unit (30) smaller during the pause period than during the scanning period, based on the control signal (SM).

Abstract: An object of the present invention is to further reduce the power consumption of a display device adopting pause driving. In a display device that includes a display driving unit (30) that drives a display unit (400); and a power supply circuit (20) that generates a plurality of operation voltages to be supplied to the display driving unit (30), and performs pause driving that repeats a scanning period during which gate bus lines (GL) are scanned and a pause period during which the scanning of the gate bus lines (GL) is stopped, the display driving unit (30) provides a control signal (SM) indicating whether the current point in time is the scanning period or the pause period, to the power supply circuit (20), and the power supply circuit (20) makes the voltage value of at least one of the plurality of operation voltages supplied to the display driving unit (30) smaller during the pause period than during the scanning period, based on the control signal (SM).

Abstract: In the present invention, occurrence of abnormality such as display misalignment at the time of image update is prevented even when pause drive is performed in a display device where data signal lines are driven by a plurality of driver ICs. In a liquid crystal display device which includes a master IC (300L) and a slave IC (300R) as driver ICs and performs pause drive, upon detection of refresh start timing by a REF (Half) of the master IC (300L), the master IC (300L) transmits a refresh control signal RfC to the slave IC (300R), and upon receipt of a refresh detection signal RfD indicating refresh start timing detected by a REF (Half) of the slave IC (300R), the master IC (300L) transmits the refresh control signal RfC to the slave IC (300R) as well as starts refreshing on the left active area based on data in a 1/2 RAM (306L). Upon receipt of the refresh control signal RfC, the slave IC (300R) starts refreshing on a right active area based on data in a 1/2 RAM (306R).

Abstract: An object of the present invention is to prevent occurrence of abnormality such as display misalignment at the time of image update even when pause drive is performed in a display device where data signal lines are driven by a plurality of driver ICs. In a liquid crystal display device which includes a master IC (300L) and a slave IC (300R) as driver ICs and performs pause drive, upon detection of refresh start timing by a REF (Half) of the master IC (300L), the master IC (300L) transmits a refresh control signal RfC to the slave IC (300R), and starts refreshing a left active area of a display portion. Upon receipt of a refresh detection signal RfD indicating refresh start timing detected by a REF (Half) of the slave IC (300R), the master IC (300L) transmits the refresh control signal RfC to the slave IC (300R), and starts refreshing the left active area of the display portion. Upon receipt of the refresh control signal RfC, the slave IC (300R) starts refreshing a right active area of the display portion.

Abstract: Provided are a liquid crystal display device and a driving method therefor that do not cause problems such as occurrence of flicker even when performing pause driving. When an off signal Soff instructing to turn off power is inputted, a polarity bias value W at the power-off is stored in a balance storage circuit. When the power is turned on again, the polarity bias value W is read from the balance storage circuit and provided to a balance control circuit. The balance control circuit starts insertion of a pause frame period to cancel out the polarity bias value W. By this, decrementing the polarity bias value W by “1” every insertion of a pause frame period is repeated. Then, at a point of time when the polarity bias value W becomes “0”, insertion of a pause frame period is ceased and normal pause driving is performed.

Abstract: Based on a REF/NREF signal coming from a REF/NREF determination circuit, a polarity bias calculation circuit updates a polarity bias count value Nb indicating a degree of a polarity bias of an applied voltage to a liquid crystal layer, and based on this polarity bias count value Nb, a bias movement determination circuit determines a moving direction of the polarity bias. Upon receiving an OFF signal Soff instructing OFF of the power supply, a balance control circuit controls a drive unit based on a result of the determination of the polarity bias moving direction and on the polarity bias count value Nb at a point of time when the OFF signal Soff is inputted so that the polarity bias can be resolved before a power supply is turned off.

Abstract: An object of the present invention is to provide an image display device that can determine the viewing direction of the user on the basis of user operations such as touch input, and perform gamma correction according to the viewing direction. The image display device includes: a display panel; a first touch detection part that detects a first input operation for any one of a plurality of touch detection regions provided in respective directions of the display panel; a direction determination part that determines directions corresponding to positions where the touch detection regions are provided on the basis of the first input operation; an angle data storage part that stores first angle data defined for each viewing direction of the image display device; and a gamma correction part that applies a first gamma correction value for an image displayed in the display panel on the basis of the direction and the first angle data.

Abstract: In the present invention, occurrence of abnormality such as display misalignment at the time of image update is prevented even when pause drive is performed in a display device where data signal lines are driven by a plurality of driver ICs. In a liquid crystal display device which includes a master IC (300L) and a slave IC (300R) as driver ICs and performs pause drive, upon detection of refresh start timing by a REF (Half) of the master IC (300L), the master IC (300L) transmits a refresh control signal RfC to the slave IC (300R), and upon receipt of a refresh detection signal RfD indicating refresh start timing detected by a REF (Half) of the slave IC (300R), the master IC (300L) transmits the refresh control signal RfC to the slave IC (300R) as well as starts refreshing on the left active area based on data in a 1/2 RAM (306L). Upon receipt of the refresh control signal RfC, the slave IC (300R) starts refreshing on a right active area based on data in a 1/2 RAM (306R).

Abstract: An object of the present invention is to prevent occurrence of abnormality such as display misalignment at the time of image update even when pause drive is performed in a display device where data signal lines are driven by a plurality of driver ICs. In a liquid crystal display device which includes a master IC (300L) and a slave IC (300R) as driver ICs and performs pause drive, upon detection of refresh start timing by a REF (Half) of the master IC (300L), the master IC (300L) transmits a refresh control signal RfC to the slave IC (300R), and starts refreshing a left active area of a display portion. Upon receipt of a refresh detection signal RfD indicating refresh start timing detected by a REF (Half) of the slave IC (300R), the master IC (300L) transmits the refresh control signal RfC to the slave IC (300R), and starts refreshing the left active area of the display portion. Upon receipt of the refresh control signal RfC, the slave IC (300R) starts refreshing a right active area of the display portion.

Abstract: Provided are a liquid crystal display device and a driving method therefor that do not cause problems such as occurrence of flicker even when performing pause driving. When an off signal Soff instructing to turn off power is inputted, a polarity bias value W at the power-off is stored in a balance storage circuit. When the power is turned on again, the polarity bias value W is read from the balance storage circuit and provided to a balance control circuit. The balance control circuit starts insertion of a pause frame period to cancel out the polarity bias value W. By this, decrementing the polarity bias value W by “1” every insertion of a pause frame period is repeated. Then, at a point of time when the polarity bias value W becomes “0”, insertion of a pause frame period is ceased and normal pause driving is performed.

Abstract: Based on a REF/NREF signal coming from a REF/NREF determination circuit, a polarity bias calculation circuit updates a polarity bias count value Nb indicating a degree of a polarity bias of an applied voltage to a liquid crystal layer, and based on this polarity bias count value Nb, a bias movement determination circuit determines a moving direction of the polarity bias. Upon receiving an OFF signal Soff instructing OFF of the power supply, a balance control circuit controls a drive unit based on a result of the determination of the polarity bias moving direction and on the polarity bias count value Nb at a point of time when the OFF signal Soff is inputted so that the polarity bias can be resolved before a power supply is turned off.

Abstract: Provided is a display device with a touch sensor that can avoid the influence of noise originating from the polarity inversion of a common voltage of the display device without using special circuitry. The display device with a touch sensor includes a sensor output readout circuit (21) that is sequentially connected to multiple sensor electrodes in a touch sensor unit (7) and outputs signal voltages that correspond to the electrical characteristics of the electrodes, a sensor control circuit (23) that supplies a control signal to the sensor output readout circuit (21), and a coordinate computation circuit (22) that detects a contact position based on the signal voltages.

Abstract: Provided is a touch sensor-equipped display device that is not susceptible to the effect of noise caused by the reversal of polarity of the common voltage of the display device, without using special circuits. The touch sensor-equipped display device includes: a touch sensor unit 7 having a plurality of sensor electrodes; a sensor output read circuit 21 that is sequentially connected to the respective sensor electrodes and that outputs a signal voltage corresponding to the electrical characteristics of the sensor electrode connected thereto; a sensor control circuit 23 that supplies a control signal to the sensor output read circuit 21; and a coordinate calculation circuit 22 that detects a contact position on the basis of the signal voltage.

Abstract: In order to provide a touch sensor-equipped display device that is not susceptible to the effect of noise caused by a polarity reversal in a common voltage of a display device without using special circuitry, the disclosed touch sensor-equipped display device is provided with: a sensor output read circuit 21 that is sequentially connected to a plurality of sensor electrodes of a touch sensor part 7 and that outputs a signal voltage according to the electrical properties of each electrode; a sensor control circuit 23 that supplies a control signal to the sensor output read circuit 21; and a coordinate calculation circuit 22 that detects a contact position on the basis of the signal voltage.

Abstract: A touch panel control circuit includes a switch signal generation circuit, a touch panel drive signal generation circuit that generates a touch panel drive signal, and a synchronizing signal generation circuit. The switch signal generation circuit generates a switch signal corresponding to a generation timing of the touch panel drive signal. The switch signal specifies a switching period during which a switching liquid crystal drive signal driving a switching liquid crystal panel is switched to a touch panel drive signal and supplied to a common board that is commonly used for a touch panel and a switching liquid crystal panel. The synchronizing signal generation circuit generates a synchronizing signal that starts switching from the switching liquid crystal drive signal to the touch panel drive signal at a predetermined period.

Abstract: In order to provide a touch sensor-equipped display device that is not susceptible to the effect of noise caused by a polarity reversal in a common voltage of a display device without using special circuitry, the disclosed touch sensor-equipped display device is provided with: a sensor output read circuit 21 that is sequentially connected to a plurality of sensor electrodes of a touch sensor part 7 and that outputs a signal voltage according to the electrical properties of each electrode; a sensor control circuit 23 that supplies a control signal to the sensor output read circuit 21; and a coordinate calculation circuit 22 that detects a contact position on the basis of the signal voltage.

Abstract: Provided is a display device with a touch sensor that can avoid the influence of noise originating from the polarity inversion of a common voltage of the display device without using special circuitry. The display device with a touch sensor includes a sensor output readout circuit (21) that is sequentially connected to multiple sensor electrodes in a touch sensor unit (7) and outputs signal voltages that correspond to the electrical characteristics of the electrodes, a sensor control circuit (23) that supplies a control signal to the sensor output readout circuit (21), and a coordinate computation circuit (22) that detects a contact position based on the signal voltages.

Abstract: Provided is a touch-sensor-equipped display device that is capable of avoiding influences of noises resulting from polarity inversion of a common voltage of the display device, without using a special circuit. It is a touch-sensor-equipped display device that includes: a sensor output readout circuit (21) that is connected to a plurality of sensor electrodes of a touch sensor part (7) successively, and that outputs a signal voltage corresponding to electric characteristics of the connected sensor electrode; a sensor control circuit (23) that supplies a control signal to the sensor output readout circuit (21); and a coordinate calculation circuit (22) that detects a contact position, based on the signal voltage. The sensor control circuit (23) performs a scanning operation for obtaining full-screen sensor data in such a manner that the scanning operation is divided into a plurality of parts.

Abstract: Provided is a touch sensor-equipped display device that is not susceptible to the effect of noise caused by the reversal of polarity of the common voltage of the display device, without using special circuits. The touch sensor-equipped display device includes: a touch sensor unit 7 having a plurality of sensor electrodes; a sensor output read circuit 21 that is sequentially connected to the respective sensor electrodes and that outputs a signal voltage corresponding to the electrical characteristics of the sensor electrode connected thereto; a sensor control circuit 23 that supplies a control signal to the sensor output read circuit 21; and a coordinate calculation circuit 22 that detects a contact position on the basis of the signal voltage.