DATA DRAVER AND ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME

Disclosed is a data driving device to drive a display panel, comprising a data signal conversion part, an output buffer part, a first cascode part, a first noise removal part, a second cascode part, a second noise removal part, a current integrator part, and an analog-digital converter. The data sig...

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Main Authors SHIN, CHOONG SUN, LEE, JOO HYUNG, KIM, JI WOONG, CHO, GYU HYEONG, BANG, JUN SUK, KWON, OH JO
Format Patent
LanguageEnglish
Korean
Published 27.12.2016
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Summary:Disclosed is a data driving device to drive a display panel, comprising a data signal conversion part, an output buffer part, a first cascode part, a first noise removal part, a second cascode part, a second noise removal part, a current integrator part, and an analog-digital converter. The data signal conversion part generates a data signal from an image data. The output buffer part outputs a data signal to a data line. The first cascode part is connected to the output buffer part and includes a plurality of transistors connected in series. The first noise removal part is connected to a first node positioned between the output buffer part and the first cascode part and removes current noise. The second cascode part is connected to the output buffer part and includes a plurality of transistors connected in series. The second noise removal part is connected to a second node positioned between the output buffer part and the second cascode part and removes current noise. The current integrator part integrates a first current flowing through a first cascode part and a second current flowing through a second cascode part to generate integral voltage. The analog-digital converter converts integral voltage into a digital signal. According to the present invention, thermal deterioration of a pixel can be effectively measured. 표시 패널을 구동하기 위한 데이터 구동 장치는 영상 데이터로부터 데이터 신호를 생성하는 데이터 신호 변환부, 데이터 라인에 데이터 신호를 출력하는 출력 버퍼부, 출력 버퍼부와 연결되고, 직렬로 연결된 복수의 트랜지스터들을 포함하는 제1 캐스코드부, 출력 버퍼부 및 제1 캐스코드부 사이의 제1 노드와 연결되고, 전류 노이즈를 제거하는 제1 노이즈 제거부, 출력 버퍼부와 연결되고, 직렬로 연결된 복수의 트랜지스터들을 포함하는 제2 캐스코드부, 출력 버퍼부 및 제2 캐스코드부 사이의 제2 노드와 연결되고, 전류 노이즈를 제거하는 제2 노이즈 제거부, 제1 캐스코드부를 통해 흐르는 제1 전류 및 제2 캐스코드부를 통해 흐르는 제2 전류를 적분하여 적분 전압을 생성하는 전류 적분부, 및 적분 전압을 디지털 신호로 변환하는 아날로그-디지털 컨버터를 포함한다.
Bibliography:Application Number: KR20150084742