US 2006/0125518 A1Published application

Shift register and display driving device comprising the same

AssigneeCasio Computer Co., Ltd.

InventorsKatsuhiko Morosawa, Takumi Yamamoto

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Abstract

A shift circuit of a shift register includes an output terminal, an input terminal, a reset terminal. A voltage is applied to a first wiring in response to the output signal from the preceding stage shift circuit to the input terminal and in accordance with the predetermined voltage to the first wiring, outputting an externally applied signal to the output terminal. A voltage level of the first wiring is reduced in response to the output signal to the reset terminal by the preceding stage shift circuit. The voltage is applied to the second wiring in response to a change in the level of the voltage applied to the first wiring. The voltage is applied to a second wiring in response to the output signal to the reset terminal by the preceding stage shift circuit. A voltage level of the output signal is reduced in response to the predetermined voltage to the second wiring.

Claims18

Dependent claims

A shift register comprising a plurality of stages,

each of the stages comprising one of cascaded shift circuits, each of the shift circuits comprising:
an output terminal which sequentially outputs an output signal and which applies the output signal to the shift circuit in a succeeding stage;
an input terminal to which the output signal from the shift circuit in a preceding stage is applied;
a reset terminal to which the output signal from the shift circuit in the succeeding stage is applied;
a first wiring;
a second wiring;
a section for applying a predetermined voltage to the first wiring in response to the input of the output signal from the shift circuit in the preceding stage to the input terminal and in accordance with the application of the predetermined voltage to the first wiring, outputting an externally applied signal of a predetermined level to the output terminal as the output signal;
a section for reducing a voltage level of the first wiring in response to the application of the output signal to the reset terminal by the shift circuit in the succeeding stage;
a section for applying the predetermined voltage to the second wiring in response to a change in the level of the voltage applied to the first wiring;
a section for applying the predetermined voltage to the second wiring in response to the application of the output signal to the reset terminal by the shift circuit in the succeeding stage;
and
a section for reducing a voltage level of the output signal in response to the application of the predetermined voltage to the second wiring.

9 more elements

A display driving device comprising a shift register including a plurality of stages to drive a display panel,

wherein each of the stages of the shift register comprises one of cascaded shift circuits,
the shift circuit comprising:
an output terminal which sequentially outputs an output signal and which applies the output signal to the shift circuit in a succeeding stage;
an input terminal to which the output signal from the shift circuit in a preceding stage is applied;
a reset terminal to which the output signal from the shift circuit in the succeeding stage is applied;
a first wiring;
a second wiring;
a section for applying a predetermined voltage to the first wiring in response to the input of the output signal from the shift circuit in the preceding stage to the input terminal;
a section for outputting an externally applied signal of a predetermined level to the output terminal as the output signal, in response to the application of the predetermined voltage to the first wiring;
a section for reducing a voltage level of the first wiring in response to the application of the output signal to the reset terminal by the shift circuit in the succeeding stage;
a section for applying the predetermined voltage to the second wiring in response to a change in the level of the voltage applied to the first wiring;
a section for applying the predetermined voltage to the second wiring in response to the application of the output signal to the reset terminal by the shift circuit in the succeeding stage;
and
a section for reducing a voltage level of the output signal in response to the application of the predetermined voltage to the second wiring.

11 more elements

Dependencies are inferred from the claim text.