UNIFORMITY AND BRIGHTNESS MEASUREMENT IN OLED DISPLAYS

摘要

A system comprising: a) an OLED display having light-emitting elements having perceptible brightness uniformity variations less than a threshold value when driven with a common signal; b) an imager with light-sensitive sensor elements having variable light exposure levels and sensitive to the light emitted by the light-emitting elements, where the sensor elements are not capable of detecting brightness uniformity variations less than the threshold value at a first light exposure level; c) optical elements arranged so that the light-sensitive sensor elements are exposed to the light-emitting elements of the OLED display; and d) a controller programmed to control the OLED display and cause the light-emitting elements to illuminate and the imager to acquire images of the illuminated light-emitting elements in the OLED display at least the first and a different second light exposure level.