Patent ID: 7042425

Claim:
A display device, comprising: a display panel including a plurality of first electrodes, a plurality of second electrodes crossing the plurality of first electrodes, and a plurality of light emitting layers having different light emission characteristics provided in the vicinity of intersections of the plurality of first electrodes and the plurality of second electrodes; a data-side driving circuit connected to the plurality of first electrodes for supplying a modulation voltage to the plurality of first electrodes; a modulation driving power supply circuit for supplying a modulation power supply voltage to the data-side driving circuit; a scanning-side driving circuit connected to the plurality of second electrodes for sequentially supplying a write voltage to the plurality of second electrodes; a write driving power supply circuit for supplying a write voltage to the scanning-side driving circuit; and a driving control circuit for controlling the data-side driving circuit, the modulation driving power supply circuit, the scanning-side driving circuit, and the write driving power supply circuit, wherein: gray-scale display is realized by changing an amplitude of the modulation voltage which is output from the data-side driving circuit, the driving control circuit is capable of supplying a first display data signal representing (m+n) grades, obtained by adding m grades represented by a second display data signal externally input and an adjustable range n, so that the modulation voltage having an amplitude corresponding to the light emission characteristic of each of the plurality of light emitting layers is supplied to the corresponding light emitting layer independently of the other light emitting layers, where m is an integer of two or greater and n is an integer of one or greater, the data-side driving circuit is capable of outputting modulation voltages having (m+n) types of amplitudes to the plurality of first electrodes in accordance with the first display data signal, and the amplitude of the modulation voltage corresponding to the light emission characteristic of a prescribed light emitting layer among the plurality of light emitting layers is adjusted to an amplitude in the adjustable range n from the amplitude corresponding to the grade represented by the second display data signal.