Invention Grant
US08085258B2 Organic electroluminescence display apparatus, driving circuit for driving organic electroluminescence light emitting portion, and driving method for organic electroluminescence light emitting portion 失效
有机电致发光显示装置,驱动有机电致发光发光部的驱动电路及有机电致发光发光部的驱动方法

Organic electroluminescence display apparatus, driving circuit for driving organic electroluminescence light emitting portion, and driving method for organic electroluminescence light emitting portion
Abstract:
A driving circuit for driving an organic electroluminescence light emitting portion includes: a driving transistor of the n channel type having source/drain regions, a channel formation region and a gate electrode; an image signal writing transistor having source/drain regions, a channel formation region and a gate electrode; and a capacitor element. A first voltage for supplying current toward the organic electroluminescence light emitting portion through the driving transistor and a second voltage for preventing a potential difference between the second node and a cathode electrode provided on the organic electroluminescence light emitting portion from exceeding a threshold voltage of the organic electroluminescence light emitting portion are selectively applied from the power supply section to the first one of the source/drain regions of the driving transistor. An LDD (Lightly Doped Drain) structure is formed adjacent the first one of the source/drain regions of the driving transistor.
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