Patent ID: 7218293
Filing Date: 2007-05-15
Classification: G09G

Abstract:
1. A method for driving an organic electroluminescent display device, which has a set of row electrodes and a set of column electrodes provided in a matrix pattern, and an organic electroluminescent element sandwiched between both sets; comprising: driving the organic electroluminescent element by an electric charge control driving method when an ambient temperature is higher than a prescribed temperature, the electric charge control driving method comprising supplying electric charges to a column electrode in the set of column electrodes and then placing an output from a driving circuit to the column electrode in the set of column electrodes in a high impedance state; driving the organic electroluminescent element by the electric charge control driving method when the ambient temperature is not higher than the prescribed temperature and when a light-emission luminance in a maximum gray scale is a relatively low luminance; and driving the organic electroluminescent element by a capacitive charge driving method when the ambient temperature is not higher than the prescribed temperature and when the light-emission luminance in the maximum gray scale is a relatively high luminance, the capacitive charge driving method comprising supplying a constant current to the column electrode in the set of column electrodes after performing the capacitance charge, and then applying a constant voltage to the column electrode in the set of column electrodes to turn off a pixel.