Touch display device
A touch display device according to an embodiment includes a display panel including a plurality of gate lines and a plurality of data lines for displaying an image and a plurality of touch sensing electrodes for sensing a touch, an application host processor configured to output an image signal, a touch control signal, and a reset signal, and a display driver integrated circuit configured to process the image signal to output the processed image signal to the display panel, receive a touch signal from a touch sensing electrode installed in the display panel, convert the touch signal into a digital signal to output a touch sensing data, and reset the display driver integrated circuit and output an interrupt signal to the application host processor upon occurrence of an error caused by electrostatic discharge.
1. A touch display device, comprising:
a display panel including a plurality of gate lines and a plurality of data lines for displaying an image and a plurality of touch sensing electrodes for sensing a touch;
an application host processor configured to output an image signal, a touch control signal, and a reset signal; and
a display driver integrated circuit configured to:
process the image signal to output the processed image signal to the display panel,
receive a touch signal from a touch sensing electrode installed in the display panel,
convert the touch signal into a digital signal to output a touch sensing data, and
reset the display driver integrated circuit and output an interrupt signal to the application host processor upon occurrence of an error caused by electrostatic discharge,
wherein the display driver integrated circuit includes:
a display processor configured to process the image signal to output the processed image signal to the display panel, and output a display error signal upon occurrence of an error caused by electrostatic discharge; and
a touch sensing processor configured to receive the touch signal from the touch sensing electrode installed in the display panel, convert the touch signal into the digital signal to output the touch sensing data, receive the display error signal to output a display reset signal, and output the display reset signal or a touch reset signal and simultaneously output an interrupt signal to the application host processor, upon occurrence of an error caused by electrostatic discharge.
2. The touch display device according to claim 1 , wherein the display processor includes:
a digital serial interface unit configured to receive a packet via a mobile industry processor interface from the application host processor to restore a vertical synchronization signal and a horizontal synchronization signal, and output a first error detection signal upon occurrence of an error in a signal transmitted via the mobile industry processor interface;
a display command set unit configured to receive a clock signal and image data from the digital serial interface unit, output an analog data signal to the display panel, perform a checksum operation to determine whether an mobile industry processor interface clock is changed with respect to each vertical synchronization signal, and output a second error detection signal when the mobile industry processor interface clock is changed; and
an interrupt reset generator configured to output a reset signal to the digital serial interface unit and output the display error signal to the touch sensing processor, when the digital serial interface unit or the display command set unit generates the first or second error detection signal.
3. The touch display device according to claim 2 , further comprising:
a first OR gate configured to reset the display processor by performing a logical OR operation on the display reset signal from the touch sensing processor and the reset signal from the application host processor.
4. The touch display device according to claim 1 , wherein the touch sensing processor includes:
a touch interface unit configured to receive the touch control signal from the application host processor to output a touch enable signal and a wakeup signal, and output a pulse width modulation signal for sensing touch to the display panel;
a touch sensing unit configured to sense the touch signal from the touch sensing electrode installed in the display panel and convert the touch signal into the digital signal to output the digital signal; and
a microcontroller unit configured to output the touch reset signal and simultaneously output the interrupt signal to the application host processor upon occurrence of an error caused by electrostatic discharge in the touch interface unit, and output the display reset signal and simultaneously output the interrupt signal to the application host processor upon occurrence of an error caused by electrostatic discharge in the display processor.
5. The touch display device according to claim 4 , further comprising:
a second OR gate configured to reset the touch sensing processor by performing a logical OR operation on the touch reset signal from the microcontroller unit and the reset signal from the application host processor.
6. The touch display device according to claim 4 , wherein, when the touch enable signal or the wakeup signal is not present during a touch sensing period after a display period, the microcontroller unit determines that an error has occurred due to electrostatic discharge and outputs the touch reset signal and simultaneously outputs the interrupt signal to the application host processor.
7. The touch display device according to claim 4 , wherein, when the touch sensing data output from the touch sensing unit denotes a value which is greater than or less than a predetermined value, the microcontroller unit determines that an error has occurred due to electrostatic discharge and outputs the touch reset signal and simultaneously outputs the interrupt signal to the application host processor.