IMAGE DISPLAY APPARATUS AND CONTROL METHOD THEREFOR
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Accused Products
Abstract
An image display apparatus comprises a pixel having a drive transistor and a pixel display element which are connected in series between a first power line and a second power line, a holding capacitor connected to a gate electrode of the drive transistor, and a selection transistor connected between a signal line and the gate electrode of the drive transistor. When the selection transistor is turned on, gradation pixel data is written in the holding capacitor from the signal line. The charge of gradation pixel data written in the holding capacitor is discharged for a certain period through the drive transistor, thereafter the charge of the gradation pixel data stored in the holding capacitor is held by floating the gate electrode of the drive transistor.
157 Citations
42 Claims
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1-26. -26. (canceled)
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27. A drive circuit for a current control element, comprising:
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a drive transistor and a pixel display element which are connected in series between a first power line and a second power line; a holding capacitor connected to a gate electrode of said drive transistor; and a selection transistor connected between a signal line and the gate electrode of said drive transistor; wherein said selection transistor is turned on to input a first signal voltage from said signal line to discharge signal charges written in said holding capacitor through said drive transistor in a selection period of said drive circuit, thereafter a second signal voltage is input from said signal line and held in said holding capacitor, and said selection transistor is turned off to pass a current through said drive transistor to said current control element in a non-selection period of said drive circuit. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A drive method for a drive circuit including a drive transistor and a pixel display element which are connected in series between a first power line and a second power line, a holding capacitor connected to a gate electrode of said drive transistor, and a selection transistor connected between a signal line and the gate electrode of said drive transistor, the drive method comprising the steps of:
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turning on said selection transistor to input a first signal voltage from said signal line to discharge signal charges written in said holding capacitor through said drive transistor in a selection period of said drive circuit; inputting a second signal voltage from said signal line and holding the second signal voltage in said holding capacitor, and turning off said selection transistor to pass a current through said drive transistor to said current control element in a non-selection period of said drive circuit. - View Dependent Claims (40, 41, 42)
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Specification