A method of saving power in a color organic electroluminescent display of the type having color emitting elements with different light emitting efficiencies, includes the steps of: providing a organic electroluminescent color display having colored light emitting elements and white light emitting elements; converting at least a portion of a color digital image to be displayed on the display to a monochrome image; and displaying the monochrome image portion using only the white light emitting elements.

 
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< OLED apparatus having improved fault tolerance

< Image display device

> Driving method of display device

> Light-emitting device having specific linear thermal expansion coefficient and gas barrier properties
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