The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 2006
Filed:
Jun. 16, 2004
Ronald S. Cok, Rochester, NY (US);
James H. Ford, Rochester, NY (US);
Ronald S. Cok, Rochester, NY (US);
James H. Ford, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
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.