07436923 is referenced by 54 patents and cites 24 patents.

Threshold voltage shifts of transistors which are constituents of a bidirectional shift register are reduced to prevent a malfunction in the shift register. A bidirectional unit shift register includes first and second pull-down circuits (41, 42) connected to the gate of a first transistor (Q1) that supplies a first clock signal (CLK) to an output terminal (OUT). The first pull-down circuit (41) includes a first inverter that uses the gate of the first transistor (Q1) as the input node and that is activated by the first clock signal (CLK), and a second transistor (Q5A) that discharges the gate of the first transistor (Q1) according to the output of the first inverter. The second pull-down circuit (42) includes a second inverter that uses the gate of the first transistor (Q1) as the input node and that is activated by a second clock signal (/CLK) having a different phase from the first clock signal (CLK), and a third transistor (Q5A) that discharges the gate of the first transistor according to the output of the second inverter.

Title
Shift register circuit and image display apparatus containing the same
Application Number
11/937791
Publication Number
7436923 (B2)
Application Date
November 9, 2007
Publication Date
October 14, 2008
Inventor
Youichi Tobita
Tokyo
JP
Agent
Oblon Spivak McClelland Maier & Neustadt P C
Assignee
Mitsubishi Electric Corporation
JP
IPC
G11C 19/00
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