US 12,438,545 B2
Level shifter and display device including the same
Hoon Jang, Paju-si (KR); Jun O Hur, Paju-si (KR); and Dong Ju Kim, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Aug. 25, 2023, as Appl. No. 18/455,718.
Claims priority of application No. 10-2022-0174463 (KR), filed on Dec. 14, 2022.
Prior Publication US 2024/0204781 A1, Jun. 20, 2024
Int. Cl. G09G 5/00 (2006.01); G09G 3/3233 (2016.01); H03K 19/0185 (2006.01); G11C 19/28 (2006.01)
CPC H03K 19/01855 (2013.01) [G09G 3/3233 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/0289 (2013.01); G09G 2310/08 (2013.01); G09G 2330/06 (2013.01); G11C 19/28 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A level shifter comprising:
a first power input terminal to which a first gate voltage is applied;
a second power input terminal to which a second gate voltage lower than the first gate voltage is applied;
a third power input terminal to which a third gate voltage lower than the first gate voltage and higher than the second gate voltage is applied;
an output terminal through which a shift clock is outputted;
a first switch element configured to electrically connect the first power input terminal to the output terminal in response to a voltage of on-intervals of a first control signal;
a second switch element configured to electrically connect the second power input terminal to the output terminal in response to a voltage of on-intervals of a second control signal; and
a third switch element configured to electrically connect the third power input terminal to the output terminal in response to a voltage of on-intervals of a third control signal,
wherein a portion of a first on-interval of the third control signal overlaps with a portion of the on-intervals of the first control signal; and
a portion of a second on-interval of the third control signal overlaps with a portion of the on-intervals of the second control signal,
wherein the first on-interval of the third control signal includes:
a first non-overlapping interval not overlapping with the on-interval of the first control signal and the on-interval of the second control signal; and
a first overlapping interval overlapping with a portion of an interval including a rising edge of a pulse among the on-intervals of the first control signal, and
wherein the second on-interval of the third control signal includes:
a second non-overlapping interval not overlapping with the on-interval of the first control signal and the on-interval of the second control signal; and
a second overlapping interval overlapping with a portion of an interval including a rising edge of a pulse among the on-intervals of the second control signal.