| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emitting device having little inhomogeneity in brightness. SOLUTION: A light emitting device characterized in that the expression (2) or expression (3) with expression (1) holds when the drain current of a plurality of current control TFTs is expressed by Id, mobility by μ, gate capacity per unit area by C0, maximum gate voltage by Vgs(max), channel width by W, channel length by L, mean value of threshold voltages by Vth, and deviation from the mean value of the threshold voltages by ΔVth, and if variation of the light emission brightness of a plurality of EL elements in ±n% or less. |
