KR102352590B1 - 액정 표시 장치 및 전자 기기 - Google Patents
액정 표시 장치 및 전자 기기 Download PDFInfo
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- KR102352590B1 KR102352590B1 KR1020217020804A KR20217020804A KR102352590B1 KR 102352590 B1 KR102352590 B1 KR 102352590B1 KR 1020217020804 A KR1020217020804 A KR 1020217020804A KR 20217020804 A KR20217020804 A KR 20217020804A KR 102352590 B1 KR102352590 B1 KR 102352590B1
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Abstract
각 화소에 형성되는 트랜지스터로, 채널 형성 영역이 산화물 반도체층에 의해 구성되는 트랜지스터를 적용한다. 한편, 이 산화물 반도체층을 고순도화함으로써, 이 트랜지스터의 실온에서의 오프 전류값을 10aA/㎛ 이하, 또한 85℃에서의 오프 전류값을 100aA/㎛ 이하로 하는 것이 가능하다. 이로 인해, 액정 표시 장치의 소비 전력을 저감하는 것 및 표시의 열화를 억제하는 것이 가능하게 된다. 또한, 상기한 바와 같이 이 트랜지스터는, 85℃라는 고온에서도 오프 전류값을 100aA/㎛ 이하로 하는 것이 가능하다. 이로 인해, 온도 등의 외부 인자에 의한 액정 표시 장치의 표시의 열화를 억제할 수 있다.
Description
도 2는, 실시형태 1에 관한 액정 표시 장치를 설명하는 도면이다.
도 3(A)~(C)는, 실시형태 1에 관한 액정 표시 장치를 설명하는 도면이다.
도 4(A)~(D)는, 실시형태 2에 관한 트랜지스터를 설명하는 도면이다.
도 5(A), (B)는, 실시형태 3에 관한 액정 표시 장치를 설명하는 도면이다.
도 6(A)~(F)는, 실시형태 4에 관한 전자 기기를 설명하는 도면이다.
도 7은, 실시예 1에 관한 트랜지스터의 초기 특성을 나타낸 도면이다.
도 8(A), (B)는, 실시예 1에 관한 트랜지스터의 평가용 소자의 상면도이다.
도 9(A), (B)는, 실시예 1에 관한 트랜지스터의 평가용 소자의 Vg-Id 특성을 나타낸 도면이다.
12; 신호선 구동 회로 13; 화소부
14; 화소 15; 트랜지스터
16; 액정 소자 17; 용량 소자
20; 신호 생성 회로 21; 기억 회로
22; 비교 회로 23; 선택 회로
24; 표시 제어 회로 25; 메모리
400; 기판 402; 게이트 절연층
403; 보호 절연층 410; 박막 트랜지스터
411; 게이트 전극층 413; 채널 형성 영역
414a; 소스 영역 414b; 드레인 영역
415a; 소스 전극층 415b; 드레인 전극층
416; 산화물 절연층 430; 산화물 반도체막
431; 산화물 반도체층 501; 액정 표시 패널
502; 터치 패널 유닛 503; 하우징
504; 액정 표시 장치 505; 화소
506; 광센서 507; 액정 소자
508; 주사선 구동 회로 509; 신호선 구동 회로
510; 광센서용 구동 회로 2201; 본체
2202; 하우징 2203; 표시부
2204; 키보드 2211; 본체
2212; 스타일러스 2213; 표시부
2214; 조작 버튼 2215; 외부 인터페이스
2220; 전자 서적 2221; 하우징
2223; 하우징 2225; 표시부
2227; 표시부 2231; 전원
2233; 조작키 2235; 스피커
2237; 축부 2240; 하우징
2241; 하우징 2242; 표시 패널
2243; 스피커 2244; 마이크로폰
2245; 조작키 2246; 포인팅 디바이스
2247; 카메라용 렌즈 2248; 외부 접속 단자
2249; 태양 전지 셀 2250; 외부 메모리 슬롯
2261; 본체 2263; 접안부
2264; 조작 스위치 2265; 표시부(B)
2266; 배터리 2267; 표시부(A)
2270; 텔레비전 장치 2271; 하우징
2273; 표시부 2275; 스탠드
2277; 표시부 2279; 조작키
2280; 리모콘 조작기
Claims (4)
- 액정 표시 장치로서,
화소와 구동 회로를 가지고,
상기 화소는 트랜지스터와 상기 트랜지스터에 전기적으로 접속된 액정 소자를 가지고,
상기 트랜지스터는,
기판 위의 게이트 전극;
상기 게이트 전극 위의 게이트 절연막;
상기 게이트 절연막 위의 산화물 반도체층; 및
상기 산화물 반도체층 위의 소스 전극 및 드레인 전극을 가지고,
상기 산화물 반도체층은 제 1 영역, 제 2 영역, 및 상기 제 1 영역과 상기 제 2 영역 사이의 채널 형성 영역을 가지고,
상기 제 1 영역과 상기 제 2 영역은 각각, 상기 채널 형성 영역보다 저저항화되어 있고,
상기 화소가 정지화(still image)를 표시하는 기간은 상기 구동 회로에 스타트 펄스 신호와 클록 신호가 공급되지 않는 기간을 가지는, 액정 표시 장치. - 제 1 항에 있어서,
상기 소스 전극 및 상기 드레인 전극 위에 상기 산화물 반도체층에 접하는 산화 실리콘막; 및
상기 산화 실리콘막 위의 질화 실리콘막을 더 가지고,
상기 소스 전극 및 상기 드레인 전극은 각각, 제 1 티탄막, 상기 제 1 티탄막 위의 알루미늄막, 및 상기 알루미늄막 위의 제 2 티탄막을 가지는, 액정 표시 장치. - 제 1 항 또는 제 2 항에 있어서,
상기 화소로 표시되는 화상이 동화(moving image) 또는 정지화라고 판단하는 회로를 더 가지는, 액정 표시 장치. - 제 1 항 또는 제 2 항에 있어서,
상기 트랜지스터의 소스-드레인 간 전압은 6V이고, 게이트 전압은 -5V 또는 -10V일 때, 상기 트랜지스터의 오프 전류는 100aA/㎛ 이하인, 액정 표시 장치.
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