Transistor circuit
First Claim
Patent Images
1. A transistor circuit, comprising:
- a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate; and
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element;
wherein transistor capacitance generated between the gate and a source or drain or channel area of the second transistor is no less than 5fF.
1 Assignment
0 Petitions
Accused Products
Abstract
Transistor capacitance Cdtr inevitably generated between the gate and the drain of a second TFT is increased. Accordingly, an operation test of a first TFT and the second TFT can be conducted by turning on the first TFT to charge the transistor capacitance Cdtr and detecting the stored charges.
-
Citations
12 Claims
-
1. A transistor circuit, comprising:
-
a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate; and
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element;
whereintransistor capacitance generated between the gate and a source or drain or channel area of the second transistor is no less than 5fF. - View Dependent Claims (2, 3)
-
-
4. A transistor circuit, comprising:
-
a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate;
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element; and
a storage capacitor for storing electric charges connected to the second terminal of the first transistor and the gate of the second transistor;
whereintransistor capacitance generated between the gate and a source or drain of the second transistor is no less than 5% of capacitance of the storage capacitor. - View Dependent Claims (5)
-
-
6. A transistor circuit, comprising:
-
a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate; and
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element;
whereinthe second transistor is capable of increasing transistor capacitance generated between the gate and a source or drain or channel area of the second transistor by enlarging, in a planer direction, a portion of a channel region of the second transistor, thereby expanding the channel region while maintaining its channel width and channel length.
-
-
7. A transistor circuit, comprising:
-
a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate;
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element;
wherein the second transistor is capable of increasing a transistor capacitance between the gate of the second transistor and a second terminal of the second transistor by enlarging, in a planer direction, a portion of a channel region of the second transistor, thereby expanding the channel region while maintaining a channel width of the channel region and a channel length; and
a storage capacitor for storing electric charges connected to the second terminal of the first transistor and the gate of the second transistor.
-
-
8. A transistor circuit, comprising:
-
a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate;
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element;
wherein the signal line connected to the first terminal of the first transistor is a data line which supplies display data;
the current-consuming or current-generating element is an organic EL element; and
the second transistor supplies, from a power line to the organic EL element, an electric current in accordance with a voltage stored in the storage capacitor; and
wherein the second transistor is capable of increasing a transistor capacitance between the gate of the second transistor and a second terminal of the second transistor by enlarging, in planer direction, a portion of a channel region of the second transistor, thereby expanding the channel region while maintaining a channel width of the channel region and a channel length.
-
-
9. A method for testing a transistor circuit, wherein the transistor circuit includes
a first transistor including a first terminal connected to a signal line, the first transistor being operated by receiving a selection signal at its gate; - and
a second transistor including a gate connected to a second terminal of the first transistor, the second transistor controlling an electric current related to a current-consuming or current-generating element;
the testing method comprising;
setting voltage of the signal line to a predetermined voltage value;
in that state, turning on the first transistor such that the voltage of the signal line and gate voltage of the second transistor are set to the predetermined voltage value;
subsequently detecting a stored charge amount at the gate of the second transistor, so as to determine transistor capacitance of the second transistor; and
confirming operation of the second transistor based on the determined transistor capacitance. - View Dependent Claims (10, 11, 12)
- and
Specification