Light-Emitting Device
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Accused Products
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 that
6 Citations
19 Claims
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1. (canceled)
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2. A semiconductor device comprising:
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a first pixel comprising; a first transistor comprising a first semiconductor film including a first channel forming region, the first channel forming region having a first channel width and a first channel length; and a first EL element connected to the first transistor; and a second pixel comprising; a second transistor comprising a second semiconductor film including a second channel forming region, the second channel forming region having a second channel width and a second channel length; and a second EL element connected to the second transistor, wherein a ratio of the first channel width to the first channel length is different from a ratio of the second channel width to the second channel length, wherein the first EL element and the second EL element comprise a first EL material and a second EL material, respectively, wherein the first EL material is different from the second EL material, and wherein each of the first channel forming region and the second channel forming region comprises crystalline silicon. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device comprising:
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a first pixel comprising; a first transistor comprising a first semiconductor film including a first channel forming region, the first channel forming region having a first channel width and a first channel length; and a first pixel electrode electrically connected to the first transistor; a second pixel comprising; a second transistor comprising a second semiconductor film including a second channel forming region, the second channel forming region having a second channel width and a second channel length; and a second pixel electrode electrically connected to the second transistor; a flattening layer interposed between the first channel forming region and the first pixel electrode; and a layer including an organic material, the layer being over and in contact with the first pixel electrode, wherein a ratio of the first channel width to the first channel length is different from a ratio of the second channel width to the second channel length, and wherein each of the first channel forming region and the second channel forming region comprises crystalline silicon. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification