| 摘要 |
A display device, which forms a plurality of light emitting elements having different luminous intensities for individual picture elements and presents gradations by controlling the light emission or light nonemission of each light emitting element. Digital signals are transmitted up to respective picture elements and controlled by means of thin film transistors respectively connected in series with the light emitting elements. The luminous intensity of each light emitting element is represented by a geometrical progression with a common ratio of "2". The turning-on resistances of the thin film transistors are made smaller than those of the light emitting elements and the turning-off resistances of the transistors are made larger than those of the light emitting elements. Consequently, the picture quality of the display device is improved by reducing the nonuniformity of the luminous intensities of the light emitting elements caused by the nonuniformity of the conductances of the transistors.
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