08493295 is referenced by 31 patents and cites 77 patents.

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 that A = 2 ⁢ Id μ * C 0 A ( Vgs ( max ) - Vth ) 2 ≦ W L ≦ ( 1 + n 100 - 1 ) 2 * A Δ ⁢ ⁢ Vth 2  Δ ⁢ ⁢ Vth  ≦ ( 1 + n 100 - 1 ) * A * L / W .

Title
Light-emitting device
Application Number
13/10118
Publication Number
8493295 (B2)
Application Date
January 20, 2011
Publication Date
July 23, 2013
Inventor
Mai Osada
Kanagawa
JP
Jun Koyama
Kanagawa
JP
Shunpei Yamazaki
Tokyo
JP
Agent
Fish & Richardson P C
Assignee
Semiconductor Energy Laboratory
JP
IPC
G09G 3/30
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