SYSTEM AND DRIVING METHOD FOR LIGHT EMITTING DEVICE DISPLAY
First Claim
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1. A pixel circuit comprising:
- a light emitting device;
a driving transistor for providing a pixel current to the light emitting device, the driving transistor having a gate terminal, a first terminal coupled to the light emitting device, and a second terminal;
a storage capacitor provided between a data line for providing programming voltage data and the gate terminal of the driving transistor;
a first switch transistor provided between the gate terminal of the driving transistor and the first terminal of the driving transistor; and
a second switch transistor provided between the first terminal of the driving transistor and a bias line for providing a bias current to the first terminal of the driving transistor during a programming cycle.
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Abstract
A light emitting device display, its pixel circuit and its driving technique is provided. The pixel includes a light emitting device and a plurality of transistors. A bias current and programming voltage data are provided to the pixel circuit in accordance with a driving scheme so that the current through the driving transistor to the light emitting device is adjusted.
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Citations
28 Claims
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1. A pixel circuit comprising:
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a light emitting device; a driving transistor for providing a pixel current to the light emitting device, the driving transistor having a gate terminal, a first terminal coupled to the light emitting device, and a second terminal; a storage capacitor provided between a data line for providing programming voltage data and the gate terminal of the driving transistor; a first switch transistor provided between the gate terminal of the driving transistor and the first terminal of the driving transistor; and a second switch transistor provided between the first terminal of the driving transistor and a bias line for providing a bias current to the first terminal of the driving transistor during a programming cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17, 18, 19, 25)
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9. A pixel circuit comprising:
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a light emitting device; a storage capacitor having a first terminal and a second terminal; a driving transistor for providing a pixel current to the light emitting device, the driving transistor having a gate terminal, a first terminal coupled to the first terminal of the storage capacitor, and a second terminal coupled to the light emitting device; a first switch transistor operated by a first select line and provided between the second terminal of the storage capacitor and a data line for providing programming voltage data; a second switch transistor operated by the first select line and provided between the first terminal of the storage capacitor and a bias line for providing a bias current to the first terminal of the driving transistor during a programming cycle; and an emission control circuit for setting the pixel circuit into an emission mode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 20, 21, 22, 26)
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23. A method of driving a pixel circuit, the pixel circuit having a driving transistor for providing a pixel current to a light emitting device, a storage capacitor coupled to a data line, and a switch transistor coupled to the gate terminal of the driving transistor and the storage capacitor, the method comprising:
at a programming cycle, selecting the pixel circuit, providing a bias current to a connection between the driving transistor and the light emitting device, and providing programming voltage data from the data line to the pixel circuit. - View Dependent Claims (27)
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24. A method of driving a pixel circuit, the pixel circuit having a driving transistor for providing a pixel current to a light emitting device, a switch transistor coupled to a data line, and a storage capacitor coupled to the switch transistor and the driving transistor, the method comprising:
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at a programming cycle, selecting the pixel circuit, providing a bias current to a first terminal of the driving transistor, and providing programming voltage data from the data line to a first terminal of the storage capacitor, the second terminal of the storage capacitor being coupled to the first terminal of the driving transistor, a second terminal of the driving transistor being coupled to the light emitting device; and at a driving cycle, setting an emission mode in the pixel circuit. - View Dependent Claims (28)
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Specification