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US 2010/0245335 A1Published application
Liquid crystal display device, driving method of the same, and electronic device including the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHajime KIMURA, Atsushi UMEZAKI
Life of this patent
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Abstract
It is an object to suppress deterioration of characteristics of a transistor in a driver circuit. A first switch for controlling whether to set a potential state of an output signal by being turned on and off in accordance with the first input signal, and a second switch for controlling whether to set a potential state of an output signal by being turned on and off in accordance with the second input signal are included. A first wiring and a second wiring are brought into electrical continuity by turning on and off of the first switch or the second switch.
Claims25
A liquid crystal display device comprising:
- a driver circuit to which a first input signal, a second input signal, and a third input signal are input and according to which an output signal is output;
- and
- a pixel in which a liquid crystal element is included and a voltage applied to the liquid crystal element is set in accordance with the output signal,
- wherein the driver circuit comprises:
- a first switch and a second switch configured to be turned on and off in accordance with the third input signal;
- a third switch which controls whether to set a potential state of the output signal by turning on and off of the third switch in accordance with the first input signal, wherein an input of the first input signal is controlled by turning on and off of the first switch in accordance with the third input signal;
- and
- a fourth switch which controls whether to set a potential state of the output signal by turning on and off of the fourth switch in accordance with the second input signal, wherein an input of the second input signal is controlled by turning on and off of the second switch in accordance with the third input signal.
5 more elements
A liquid crystal display device comprising:
- a driver circuit to which a first input signal, a second input signal, and a third input signal are input and from which an output signal is output;
- and
- a pixel in which a liquid crystal element is included and a voltage applied to the liquid crystal element is set in accordance with the output signal,
- wherein the driver circuit includes a first transistor having a gate, a source, and a drain;
- a second transistor having a gate, a source and a drain;
- a third transistor having a gate, a source, and a drain;
- and a fourth transistor having a gate, a source, and a drain,
- wherein the third input signal is input to the gate of the first transistor, and the first input signal is input to one of the source and the drain of the first transistor;
- wherein the third input signal is input to the gate of the second transistor, and the second input signal is input to one of the source and the drain of the second transistor;
- wherein the gate of the third transistor is electrically connected to the other of the source and the drain of the first transistor;
- wherein the gate of the fourth transistor is electrically connected to the other of the source and the drain of the second transistor;
- and
- wherein a potential state of the output signal is controlled by turning on and off of the third transistor and the fourth transistor.
10 more elements
A liquid crystal display device comprising:
- a driver circuit to which a first input signal, a second input signal, a third input signal, and a fourth input signal are input and from which an output signal is output;
- and
- a pixel in which a liquid crystal element is included and a voltage applied to the liquid crystal element is set in accordance with the output signal,
- wherein the driver circuit comprises:
- a first wiring to which the first input signal is input;
- a second wiring to which the second input signal is input;
- a third wiring to which the third input signal is input;
- a fourth wiring to which the fourth input signal is input;
- a first transistor having a gate, a source, and a drain;
- a second transistor having a gate, a source, and a drain;
- a third transistor having a gate, a source, and a drain;
- a fourth transistor having a gate, a source, and a drain;
- and
- a fifth wiring;
- wherein the gate of the first transistor is electrically connected to the third wiring and one of the source and the drain of the first transistor is electrically connected to the first wiring;
- wherein the gate of the second transistor is electrically connected to the third wiring and one of the source and the drain of the second transistor is electrically connected to the second wiring;
- wherein the gate of the third transistor is electrically connected to the other of the source and the drain of the first transistor and one of the source and the drain of the third transistor is electrically connected to the fourth wiring;
- wherein the gate of the fourth transistor is electrically connected to the other of the source and the drain of the second transistor and one of the source and the drain of the fourth transistor is electrically connected to the fourth wiring;
- and
- wherein the fifth wiring is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor, and a potential applied to the fifth wiring is equal to a potential of the output signal.
17 more elements
A liquid crystal display device comprising:
- a driver circuit to which a first input signal, a second input signal, a third input signal, and a fourth input signal are input and from which an output signal is output;
- and
- a pixel in which a liquid crystal element is included and a voltage applied to the liquid crystal element is set in accordance with the output signal,
- wherein the driver circuit comprises:
- a first wiring to which the first input signal is input;
- a second wiring to which the second input signal is input;
- a third wiring to which the third input signal is input;
- a fourth wiring to which the fourth input signal is input;
- a first transistor having a gate, a source, and a drain;
- a second transistor having a gate, a source, and a drain;
- a third transistor having a gate, a source, and a drain;
- a fourth transistor having a gate, a source, and a drain;
- and
- a fifth wiring;
- wherein the gate and one of the source and the drain of the first transistor are electrically connected to the first wiring;
- wherein the gate and one of the source and the drain of the second transistor are electrically connected to the second wiring;
- wherein the gate of the third transistor is electrically connected to the other of the source and the drain of the first transistor and one of the source and the drain of the third transistor is electrically connected to the third wiring;
- wherein the gate of the fourth transistor is electrically connected to the other of the source and the drain of the second transistor and one of the source and the drain of the fourth transistor is electrically connected to the fourth wiring;
- and
- wherein the fifth wiring is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor, and a potential applied to the fifth wiring is equal to a potential of the output signal.
17 more elements
A liquid crystal display device comprising:
- a driver circuit to which a first input signal and a second input signal are input and from which an output signal is output;
- and
- a pixel in which a liquid crystal element is included and a voltage applied to the liquid crystal element is set in accordance with the output signal,
- wherein the driver circuit comprises:
- a first wiring to which the first input signal is input;
- a second wiring to which the second input signal is input;
- a first transistor having a gate, a source, and a drain;
- a second transistor having a gate, a source, and a drain;
- a third transistor having a gate, a source, and a drain;
- a fourth transistor having a gate, a source, and a drain;
- and
- a third wiring,
- wherein the gate and one of the source and the drain of the first transistor are electrically connected to the first wiring;
- wherein the gate and one of the source and the drain of the second transistor are electrically connected to the second wiring;
- wherein the gate and one of the source and the drain of the third transistor are electrically connected to the other of the source and the drain of the first transistor;
- wherein the gate and one of the source and the drain of the fourth transistor are electrically connected to the other of the source and the drain of the second transistor;
- and
- wherein the third wiring is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor and a potential applied to the third wiring is equal to a potential of the output signal.
15 more elements
A liquid crystal display device comprising:
- a driver circuit to which a first input signal and a second input signal are input and from which an output signal is output;
- and
- a pixel in which a liquid crystal element is included and a voltage applied to the liquid crystal element is set in accordance with the output signal,
- wherein the driver circuit comprises:
- a first wiring to which the first input signal is input;
- a second wiring to which the second input signal is input;
- a first transistor having a gate, a source, and a drain;
- a second transistor having a gate, a source, and a drain;
- a first diode having an anode and a cathode;
- a second diode having an anode and a cathode;
- and
- a third wiring,
- wherein the gate and one of the source and the drain of the first transistor are electrically connected to the first wiring;
- wherein the gate and one of the source and the drain of the second transistor are electrically connected to the second wiring;
- wherein the anode of the first diode is electrically connected to the other of the source and the drain of the first transistor;
- wherein the anode of the second diode is electrically connected to the other of the source and the drain of the second transistor;
- and
- wherein the third wiring is electrically connected to the cathode of the first diode and the cathode of the second diode and a potential applied to the third wiring is equal to a potential of the output signal.
15 more elements
Dependencies are inferred from the claim text.