Lg Display Co., Ltd.

SuWon Lee

HyunWoo Jang

HyeongWon Kang

JaeKyu Park

Jonghee Hwang

YoungGyu Kim

Yoonnara Jang

MyungHo Shin

JongGu Heo

A display device includes at least one touch sensor configured to sense a touch in response to a touch signal, a display panel including the at least one touch sensor and configured to operate in one of a display mode and a touch-sensing mode, a first circuit and a second circuit. The first circuit is configured to supply at least one of a first touch signal and a second touch signal to the at least one touch sensor during the touch-sensing mode, to yield at least one supplied signal, the first touch signal being different from the second touch signal. The second circuit is configured to control signal lines corresponding to the at least one touch sensor to receive a signal corresponding to the at least one supplied signal or to be in an electrically open state.

Display device including touch sensor and touch sensing method for the same

A touch display device includes a touch panel on which a plurality of touch electrodes is disposed; and a touch circuit configured to output a touch driving signal of a pulse type to the touch panel and to sense occurrence of touch or a touch position according to a touch synchronization signal for defining a touch period, wherein the touch circuit is configured to receive the sensing data to sense occurrence of touch or a touch position and to determine whether the touch driver malfunctions, and to output a simplified initialization command to the touch driver when it is determined that the touch driver malfunctions, and the touch driver is initialized with a pre-stored set value maintained not changed upon receiving the simplified initialization command.

Touch circuit, touch driving circuit, touch display device, and method for driving touch circuit for reducing initialization speed and minimizing loss of touch sensing data during malfunction

The present disclosure provides a touch display device and a touch driving circuit which support touch sensing of an active pen, and a method of driving the same. Sensing data acquired during a first sensing time period in a pen position sensing section may be transmitted as one data packet, and a plurality of pieces of sensing data acquired during a second sensing time period shorter than the first sensing time period in a pen data sensing section may be transmitted as one data packet, so that it is possible to reduce an unnecessary sensing time period when pen data is sensed, while preventing sensing data transmission sections from overlapping each other. In addition, information about a Most Significant Bit (MSB) of the sensing data to be transmitted when the sensing data is transmitted may be transmitted in the pen data sensing section, so that it is possible to easily restore the sensing data while minimizing a loss of the sensing data.

Touch display device, and touch driving circuit and method of driving same

A touch sensing device includes a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines, and a touch screen driving circuit which senses all the touch sensors of the touch screen in a first sensing step to detect the presence or absence of a touch input, and then again senses the touch sensors, in which the touch input is detected as a first sensing result, in a second sensing step to detect a position of the touch input. When there is no touch sensor, in which the touch input is detected as the first sensing result, the touch screen driving circuit repeats the first sensing step.

Touch sensing device

Provided are a display having a touch sensor and a method for improving the touch performance thereof, which can minimize the distortion of an execution result induced by the process of converting the resolution of touch coordinates, by compensating the coordinate values of a touch position by applying different offset values for upper, lower, left, and right sides in accordance with the sensor data values of surrounding sensor nodes adjacent to a center node having peak data.

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Ansan-si, South Korea

SuWon Lee