Electro-luminescent display including a current mirror
First Claim
1. An electro-luminescent display comprising:
- a substrate;
a gate line on the substrate;
a data line crossing the gate line;
a first TFT for selecting an arbitrary pixel by a gate signal, wherein a gate of the first TFT is connected to the gate line;
a current mirror for outputting a signal to the arbitrary pixel selected by the first TFT by receiving a data signal from the data line at the same time that the current mirror is being voltage driven, wherein the current mirror includes a second TFT and a third TFT;
wherein a drain of the third TFT is connected to a drain of the first TFT, a source of the first TFT is connected to a gate of the third TFT, and the gate of the third TFT is connected to a gate of the second TFT;
an electro-luminescent diode connected to the current mirror, wherein the diode is driven by the output signal of the current mirror.
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Accused Products
Abstract
An electro-luminescent display includes a current mirror for supplying uniform drive currents to the electro-luminescent diodes of the electro-luminescent display. The current mirror is not effected by the various threshold voltages VTH of the switching devices in the electro-luminescent display so that uniform current is output to the electro-luminescent diodes throughout the display. The electro-luminescent display includes a gate line, a data line intersecting the gate line, a first TFT for selecting an arbitrary pixel by a gate signal from the gate line, wherein a gate of the first TFT is connected to the gate line, and a current mirror for outputting a signal to an arbitrary pixel selected by the first TFT by receiving a data signal from the data line at the same time the current mirror is being driven by applied voltage. The current mirror includes a second TFT and a third TFT, and an electro-luminescent diode driven by the signal output from the current mirror.
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Citations
8 Claims
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1. An electro-luminescent display comprising:
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a substrate;
a gate line on the substrate;
a data line crossing the gate line;
a first TFT for selecting an arbitrary pixel by a gate signal, wherein a gate of the first TFT is connected to the gate line;
a current mirror for outputting a signal to the arbitrary pixel selected by the first TFT by receiving a data signal from the data line at the same time that the current mirror is being voltage driven, wherein the current mirror includes a second TFT and a third TFT;
wherein a drain of the third TFT is connected to a drain of the first TFT, a source of the first TFT is connected to a gate of the third TFT, and the gate of the third TFT is connected to a gate of the second TFT;
an electro-luminescent diode connected to the current mirror, wherein the diode is driven by the output signal of the current mirror. - View Dependent Claims (2, 3, 4, 5)
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6. A method of manufacturing an electro-luminescent display comprising the steps of:
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providing a substrate;
defining a gate line on the substrate;
defining a data line that crosses the gate line;
providing a first TFT for selecting an arbitrary pixel by a gate signal, and connecting a gate of the first TFT with the gate line;
providing a current mirror including a second TFT and a third TFT that receives a data signal from the data line as the current mirror is being voltage driven, and outputs a signal to the arbitrary pixel selected by the first TFT;
connecting a drain of the third TFT to a drain of the first TFT;
connecting a source of the first TFT to a gate of the third TFT;
connecting the gate of the third TFT to a gate of the second TFT; and
providing an electro-luminescent diode for receiving the output signal of the current mirror. - View Dependent Claims (7, 8)
connecting a gate of the fourth TFT to the gate of the first TFT and the gate line; and
connecting a source of the fourth TFT to the drain of the third TFT and the drain of the first TFT.
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Specification