System and method for setting brightness uniformity in an active-matrix organic light-emitting diode (OLED) flat-panel display

• Main Author: MALMBERG PAUL R
• Format: Patent
• Language: English
• Published: 04.05.2006
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

A brightness calibration system for and method of setting brightness uniformity in a video display, such as an active-matrix organic light-emitting diode (OLED) flat-panel display. The brightness calibration system of the present invention includes an OLED display assembly that further includes a display control circuit, an active-matrix display, a DC power supply; and a measurement circuit. In a measurement mode, the brightness calibration system and method of the present invention subjects a video display to a brightness calibration operation that alternately measures the output light intensity of every pixel for a given input voltage and saves the measured light intensity in memory. In a display mode, the brightness calibration system and method of the present invention applies a corrective voltage to each pixel, in real time, so that each pixel has substantially the same output light intensity as its neighboring pixel.