DRIVE METHOD OF EL DISPLAY PANEL
First Claim
1. An EL display panel apparatus comprising:
- a display area in which pixels are arranged in a matrix, each of the pixels having an EL element;
source signal lines which transfer an image signal to the pixels; and
gate signal lines, wherein each of the pixels has;
a driver transistor which supplies an electric current to the EL element;
a first switching transistor which supplies the image signal applies to the source signal lines to the driver transistor;
a first capacitor connected to a gate terminal of the driver transistor, the first capacitor retaining a voltage which defines the electric current passing through the driver transistor; and
a second capacitor, wherein a gate terminal of the first switching transistor is connected to one of the gate signal lines, and capacity of the second capacitor is selected such that a potential on the gate terminal of the driver transistor is varied depending on variation of a voltage applied to the one of the gate signal lines.
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Accused Products
Abstract
A switching transistor is controlled to turn on or off depending on a turn-on voltage or a turn-off voltage applied to a gate signal line. A driver transistor is supplied with an image signal applied to a source signal line through a switching transistor. A voltage based on the supplied image signal is retained by a capacitor. The driver transistor supplies a light-emitting current to an EL element based on the voltage retained in the capacitor. A capacitor is formed between one terminal of the capacitor (that is, a gate terminal of the driver transistor) and a gate signal line. The capacitor causes the gate terminal voltage of the driver transistor to be varied depending on variation of the potential on the gate signal line.
112 Citations
12 Claims
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1. An EL display panel apparatus comprising:
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a display area in which pixels are arranged in a matrix, each of the pixels having an EL element;
source signal lines which transfer an image signal to the pixels; and
gate signal lines, wherein each of the pixels has;
a driver transistor which supplies an electric current to the EL element;
a first switching transistor which supplies the image signal applies to the source signal lines to the driver transistor;
a first capacitor connected to a gate terminal of the driver transistor, the first capacitor retaining a voltage which defines the electric current passing through the driver transistor; and
a second capacitor, wherein a gate terminal of the first switching transistor is connected to one of the gate signal lines, and capacity of the second capacitor is selected such that a potential on the gate terminal of the driver transistor is varied depending on variation of a voltage applied to the one of the gate signal lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification