Patent ID: 7724217

Claim:
A driving method of a light-emitting device for displaying an image using n-bit (n is a natural number, 2≦n) digital image signals, said light-emitting device comprising a source signal line driver circuit, a gate signal line driver circuit, and a plurality of pixels, said method comprising: outputting sampling pulses from shift register circuits, and inputting said sampling pulses into latch circuits in said source signal line driver circuit; holding said digital image signals in accordance with said sampling pulses in said latch circuits; transferring said digital image signals into source signal lines by bit signal selection switches; outputting a gate signal line selection pulse from said gate signal line driver circuit, and selecting a gate signal line; writing said n-bit digital image signals inputted from said source signal lines into memory circuits at a row where said gate signal line is selected; and reading out said n-bit digital image signals stored in said memory circuits in each of said plurality of pixels, wherein each of said plurality of pixels contains n×m memory circuits configured to store said n-bit digital image signals for m frames (m is a natural number, 1≦m), n writing transistors, n writing selection transistors, n reading transistors, and n reading selection transistors.