Light-emitting device

Details Light-emitting device Light-emitting device

2006-10-31

2006-10-31

Wu, Xiao (Department: 2674)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C076S078100, C076S079000, C313S498000, C313S500000, C313S505000

Reexamination Certificate

active

07129917

ABSTRACT:
There is provided an EL light-emitting device with less uneven brightness. When a drain current of a plurality of current controlling TFTs is Id, a mobility is μ, a gate capacitance per unit area is Co, a maximum gate voltage is Vgs(max), a channel width is W, a channel length is L, an average value of a threshold voltage is Vth, a deviation from the average value of the threshold voltage is ΔVth, and a difference in emission brightness of a plurality of EL elements is within a range of ±n %, a semiconductor display device is characterized in thatA=2⁢⁢I⁢⁢dμ*C0A(Vgs(max)-Vth)2≦WL≦(1+n100-1)2*AΔ⁢⁢Vth2Δ⁢⁢Vth≦(1+n100-1)*A*L/W

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