Display device and driving apparatus thereof

An apparatus to drive a display device including a photo sensing circuit and a pressure sensing circuit, the apparatus comprising:

• a first amplifier configured to amplify a photo sensing signal from the photo sensing circuit;
• a second amplifier configured to amplify a pressure sensing signal from the pressure sensing circuit;
• a parallel-to-serial converter configured to convert the amplified photo sensing signal and the amplified pressure sensing signal into serial sensing signals;
• and
• an analog-to-digital converter configured to convert the serial sensing signals into digital sensing signals,
• wherein the apparatus is configured to selectively block the first amplifier from power supply based on the pressure sensing signal.

An apparatus to drive a display device including a photo sensing circuit and a pressure sensing circuit, the apparatus comprising:

• an amplifier configured to amplify a photo sensing signal from the photo sensing circuit and a pressure sensing signal from the pressure sensing circuit;
• a parallel-to-serial converting unit configured to convert the amplified photo sensing signal and the amplified pressure sensing signal into serial sensing signals;
• and
• an analog-to-digital converter configured to convert the serial sensing signals into digital sensing signals,
• wherein the parallel-to-serial converting unit and the analog-to-digital converter are configured to operate in synchronization with a selected one of a first clock signal and a second clock signal having a frequency lower than the first clock signal, and the selection of one of the first and the second clock signals is based on the pressure sensing signal.

A display device comprising:

• a plurality of display circuits;
• a plurality of photo sensing circuits;
• a plurality of pressure sensing circuits;
• a plurality of sensor data lines connected to the photo sensing circuits and the pressure sensing circuits;
• an image data driver configured to convert image signals into data voltages and configured to apply the data voltages to the display circuits;
• a sensing signal processor configured to process photo sensor data signals supplied from the photo sensing circuits and pressure sensor data signals supplied from the pressure sensing circuits, and configured to operate in one of a normal mode and a power saving mode based on the pressure sensor data signals;
• and
• a signal controller configured to receive the image signals from an external device and to control the image data driver and the sensing signal processor.

A method of driving a display device including a photo sensing circuit and a pressure sensing circuit, the method comprising:

• processing a first pressure sensing signal output from the pressure sensing circuit;
• determining whether a touch exists based on the first pressure sensing signal;
• if it is determined from the first pressure signal that there is a touch, processing a photo sensing signal outputted from the photo sensing circuit and a second pressure sensing signal outputted from the pressure sensing circuit;
• determining whether a touch exists based on the second pressure sensing signal;
• and
• when it is determined from the second pressure signal that there is no touch for a predetermined time, processing the first pressure sensing signal output from the pressure sensing circuit.

A display apparatus comprising:

• touch detection circuitry comprising:
• a light sensing circuit configured to generate a signal indicative of sensed light;
• and
• a physical parameter sensing circuit configured to generate a signal indicative of a sensed physical parameter;
• processing circuitry configured to generate touch information indicative of at least one of detection information and position information of a touch, wherein the processing circuitry implements a power-saving mode and a normal mode;
• and
• wherein the processing circuitry is configured to generate the touch information based on the signal indicative of the sensed physical parameter and not based on the signal indicative of sensed light in the power saving mode.