Electro-optical device

An electro-optical device comprising:

• a plurality of EL elements;
• and
• a plurality of pixels having the plurality of EL elements;
• wherein:
• one frame period comprises n subframe periods SF1, SF2, . . . , SFn;
• the n subframe periods SF1, SF2, . . . , SFn have address periods Ta1, Ta2, . . . , Tan and sustain periods Ts1, Ts2, . . . , Tsn, respectively;
• digital data signals in the address periods Ta1, Ta2, . . . , Tan are input to the plurality of pixels;
• the plurality of EL elements are selected to emit light or not to emit light during the sustain periods Ts1, Ts2, . . . , Tsn in accordance with the digital data signals;
• the brightness of the light emitted by the EL elements during at least one sustain period Tsp (where p is a natural number greater than or equal to 1, and less than or equal to n), among the sustain periods Ts1, Ts2, . . . , Tsn, is 1/m (where m is a positive number) of the brightness of the light emitted by the EL elements during an arbitrary sustain period Tsq, excepting the sustain period Tsp, and (where q is an arbitrary natural number greater than or equal to 1, and less than or equal to n, excepting p);
• the length of the sustain period Tsp is expressed as 2−(p−1)T×m (where T is a positive constant);
• and
• the length of the sustain period Tsq is expressed as 2−(q−1)T.

An electro-optical device comprising:

• a plurality of EL elements;
• and
• a plurality of pixels having the plurality of EL elements;
• wherein:
• one frame period comprises n subframe periods SF1, SF2, SFn;
• the n subframe periods SF1, SF2, . . . , SFn have address periods Ta1, Ta2, . . . , Tan and sustain periods Ts1, Ts2, . . . , Tsn, respectively;
• digital data signals in the address periods Ta1, Ta2, . . . , Tan are input to the plurality of pixels;
• the plurality of EL elements are selected to emit light or not to emit light during the sustain periods Ts1, Ts2, . . . , Tsn in accordance with the digital data signals;
• the brightness of the light emitted by the EL elements during at least one sustain period Tsp (where p is a natural number greater than or equal to 1, and less than or equal to n), among the sustain periods Ts1, Ts2, . . . , Tsn, is 1/m (where m is a positive number) of the brightness of the light emitted by the EL elements during an arbitrary sustain period Tsq, excepting the sustain period Tsp, and (where q is an arbitrary natural number greater than or equal to 1, and less than or equal to n, excepting p);
• the length of the sustain period Tsp is expressed as 2−(p−1)T×m (where T is a positive constant);
• the length of the sustain period Tsq is expressed as 2−(q−1)T;
• the plurality of EL elements each have a first electrode, a second electrode, and an EL layer formed between the first electrode and the second electrode;
• and
• the brightness of the light emitted by the EL elements is controlled by an on EL driver voltage applied between the first electrode and the second electrode.