ACTIVE-MATRIX LIGHT EMITTING DISPLAY AND METHOD FOR OBTAINING THRESHOLD VOLTAGE COMPENSATION FOR SAME
First Claim
1. An active matrix display, comprising:
- a plurality of pixels arranged in an array;
a first transistor and a second transistor associated with each pixel, the first and second transistors positioned within the array for controlling current flow through each pixel;
a light emitting diode associated with each pixel; and
a storage capacitor associated with each pixel, wherein, during a time period for establishment of a threshold voltage on the storage capacitor for the first transistor, a voltage equal to the sum of the threshold voltage and a voltage for compensating for turnoff of the second transistor is established on the storage capacitor.
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Abstract
An active matrix display includes a plurality of pixels arranged in an array, a first transistor and a second transistor associated with each pixel, the first and second transistors positioned within the array for controlling current flow through each pixel, a light emitting diode associated with each pixel; and a storage capacitor associated with each pixel, wherein, during a time period for establishment of a threshold voltage on the storage capacitor for the first transistor, a voltage equal to the sum of the threshold voltage and a voltage for compensating for turnoff of the second transistor is established on the storage. capacitor.
240 Citations
37 Claims
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1. An active matrix display, comprising:
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a plurality of pixels arranged in an array;
a first transistor and a second transistor associated with each pixel, the first and second transistors positioned within the array for controlling current flow through each pixel;
a light emitting diode associated with each pixel; and
a storage capacitor associated with each pixel, wherein, during a time period for establishment of a threshold voltage on the storage capacitor for the first transistor, a voltage equal to the sum of the threshold voltage and a voltage for compensating for turnoff of the second transistor is established on the storage capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for obtaining threshold voltage compensation for an active matrix display, comprising:
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providing a plurality of pixels arranged in an array, wherein each pixel includes a first transistor, a second transistor, a light emitting diode, and a storage capacitor associated therewith;
positioning the first and second transistors within the array for controlling current flow through each pixel; and
establishing on the storage capacitor a voltage equal to the sum of a threshold voltage for the first transistor and a voltage for compensating for turnoff of the second transistor. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An active matrix display, comprising:
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a plurality of pixels arranged in an array;
at least three transistors associated with each pixel, the at least three transistors positioned within the array for controlling current flow through each pixel;
a light emitting diode associated with each pixel; and
a storage capacitor associated with each pixel, wherein, during a time period for establishment of a threshold voltage on the storage capacitor for a first transistor of the at least three transistors, a voltage of the storage capacitor is set to a voltage including the threshold voltage and a voltage for compensating for turnoff of a second transistor of the at least three transistors.
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36. A method for obtaining threshold voltage compensation for an active matrix display, comprising:
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providing a plurality of pixels arranged in an array, wherein each pixel includes at least three transistors, a light emitting diode, and a storage capacitor associated therewith;
positioning the at least three transistors within the array for controlling current flow through each pixel; and
establishing, during a time period for establishment of a threshold voltage of a first transistor of the at least three transistors on the storage capacitor, a voltage for compensating for turnoff of a second transistor of the at least three transistors on the storage capacitor.
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37. A pixel circuit for an active matrix display, comprising:
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at least three transistors for controlling current flow through a pixel;
a light emitting diode;
a plurality of signal lines for carrying signals for controlling the at least three transistors;
a plurality of power connections for supplying power to the pixel; and
a storage capacitor, wherein, during a time period for establishment of a threshold voltage on the storage capacitor for a first transistor of the at least three transistors, a voltage equal to the sum of the threshold voltage and a voltage for compensating for turnoff of a second transistor of the at least three transistors is established on the storage capacitor.
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Specification