EL display panel, electronic apparatus and a method of driving EL display panel
AssigneeSony Corporation
InventorsTetsuro Yamamoto, Katsuhide Uchino
Life of this patent
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Abstract
Disclosed herein is an electro luminescence display panel having a pixel structure corresponding to an active matrix drive system, including: a reverse bias potential generating portion configured to generate a reverse bias potential in which corresponding one of gradation values of pixels is reflected; and a voltage applying portion configured to apply the reverse bias potential to a gate electrode of a drive transistor composing a pixel circuit adapted to operate for a non-emission time period.
Claims13
An Electro Luminescence (EL) display panel having a pixel structure corresponding to an active matrix drive system, comprising:
- a reverse bias potential generating portion configured to generate a reverse bias potential in which a corresponding one of gradation values of pixels is reflected;
- and
- a voltage applying portion configured to apply the reverse bias potential to a gate electrode of a drive transistor composing a pixel circuit adapted to operate for a non-emission time period,
- wherein the reverse bias potential is given by:
- Vini=Vthel+Vcat−(αVsig+β)(α>0 and β≧0)
- where Vini is the reverse bias potential, Vthel is a threshold potential of an EL light emitting element, Vcat is a cathode potential of said EL light emitting element, α and β are coefficients, and Vsig is a signal potential.
A method of driving an Electro Luminescence (EL) display panel having a pixel structure corresponding to an active matrix drive system, said method comprising the steps of:
- generating a reverse bias potential in which a corresponding one of gradation values of pixels is reflected;
- and
- applying the reverse bias potential to a gate electrode of a drive transistor composing a pixel circuit adapted to operate for a non-emission time period,
- wherein the reverse bias potential is given by:
- Vini=Vthel+Vcat−(αVsig+β)(α>0 and β≧0)
- where Vini is the reverse bias potential, Vthel is a threshold potential of an EL light emitting element, Vcat is a cathode potential of said EL light emitting element, α and β are coefficients, and Vsig is a signal potential.
An Electro Luminescence (EL) display panel having a pixel structure corresponding to an active matrix drive system, comprising:
- reverse bias potential generating means for generating a reverse bias potential in which a corresponding one of gradation values of pixels is reflected;
- and
- voltage applying means for applying the reverse bias potential to a gate electrode of a drive transistor composing a pixel circuit adapted to operate for a non-emission time period,
- wherein the reverse bias potential is given by:
- Vini=Vthel+Vcat−(αVsig+β)(α>0 and β≧0)
- where Vini is the reverse bias potential, Vthel is a threshold potential of an EL light emitting element, Vcat is a cathode potential of said EL light emitting element, α and β are coefficients, and Vsig is a signal potential.
Dependencies are inferred from the claim text.