INPUT SENSING DEVICE AND DISPLAY DEVICE HAVING THE SAME

An objective of the present invention is to provide an input sensing device having improved touch sensing sensitivity even in an environment in which performance of a touch sensor is deteriorated (e.g., high-speed driving, thinning, and enlargement of a display device), and a display device comprisi...

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Bibliographic Details
Main Authors LEE CHOON HYOP, LEE IN NAM, KIM JANG HUI
Format Patent
LanguageEnglish
Korean
Published 14.10.2021
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Summary:An objective of the present invention is to provide an input sensing device having improved touch sensing sensitivity even in an environment in which performance of a touch sensor is deteriorated (e.g., high-speed driving, thinning, and enlargement of a display device), and a display device comprising the same. The display device includes a display panel including pixels that emit light in a unit of a frame. The input sensing unit includes driving electrodes and sensing electrodes. A driving signal generation unit provides driving signals to the driving electrodes. Analog front-ends receive sensing signals according to driving signals from sensing electrodes. A signal processing unit determines whether a touch is made according to differential output values of the analog front ends. The driving signal generation unit provides driving signals to the driving electrodes by avoiding a period in which a pulse of a vertical sync signal, which defines the start of a frame, is generated. 표시 장치는, 프레임 단위로 발광하는 화소들을 포함하는 표시 패널을 포함한다. 입력 감지 유닛은 구동 전극들 및 센싱 전극들을 포함한다. 구동 신호 생성부는 상기 구동 전극들에 구동 신호들을 제공한다. 아날로그 전단들(analog front-ends)은 센싱 전극들로부터 구동 신호들에 따른 센싱 신호들을 수신한다. 신호 처리부는 아날로그 전단들의 차동 출력 값들에 따라 터치 여부를 판단한다. 구동 신호 생성부는 프레임의 시작을 정의하는 수직 동기 신호의 펄스가 발생하는 구간을 회피하여 구동 신호들을 구동 전극들에 제공한다.
Bibliography:Application Number: KR20200040433