Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Reexamination Certificate
2006-01-24
2006-01-24
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
C345S077000
Reexamination Certificate
active
06989636
ABSTRACT:
A method for the correction of brightness and uniformity variations in OLED displays, comprising: a) providing an OLED display having a plurality of light-emitting elements with a common power signal and local control signals; b) providing a digital input signal for displaying information on each light-emitting element, the signal having a first bit depth; c) transforming the digital input signal into a transformed digital signal having a second bit depth greater than the first bit depth; and d) correcting the transformed signal for one or more light-emitting elements of the display by applying a local correction factor to produce a corrected digital signal. In accordance with various embodiments, the present invention may provide the advantages of improved uniformity in a display that reduces the complexity of calculations, maintains a consistent bit-depth for all light-emitting elements, provides a pre-determined output brightness, improves the yields of the manufacturing process, and reduces the electronic circuitry needed to implement the uniformity calculations and transformations.
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Cok Ronald S.
Ford James H.
Anderson Andrew J.
Eastman Kodak Company
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