US 11,749,219 B2
Bidirectional shift register performing shift action based on clock signals and display device provided with same
Yasushi Sasaki, Kameyama (JP); Shige Furuta, Kameyama (JP); Yuhichiroh Murakami, Kameyama (JP); Hidekazu Yamanaka, Kameyama (JP); and Hiroyuki Adachi, Kameyama (JP)
Assigned to Sharp Display Technology Corporation, Kameyama (JP)
Filed by Sharp Display Technology Corporation, Kameyama (JP)
Filed on Dec. 1, 2021, as Appl. No. 17/539,515.
Claims priority of application No. 2021-013784 (JP), filed on Jan. 29, 2021.
Prior Publication US 2022/0246104 A1, Aug. 4, 2022
Int. Cl. G09G 3/36 (2006.01); G11C 19/28 (2006.01)
CPC G09G 3/36 (2013.01) [G11C 19/28 (2013.01); G09G 3/3674 (2013.01); G09G 2300/0814 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0283 (2013.01); G09G 2310/0286 (2013.01); G09G 2310/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A bidirectional shift register comprising a plurality of stages,
wherein the bidirectional shift register is configured to perform shift action based on a plurality of clock signals of three or more phases, each of the plurality of clock signals repeating a change from a high level to a low level and a change from the low level to the high level throughout a period during which the shift action is performed,
a signal obtained through sampling a shift start signal by using one of the plurality of clock signals supplied to the plurality of stages is supplied as a shift pulse for a forward shift action to a first stage of the plurality of stages, and
a signal obtained through sampling the shift start signal by using another one of the plurality of clock signals supplied to the plurality of stages is supplied as a shift pulse for a backward shift action to a last stage of the plurality of stages.