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US 9,853,063 B2Granted
Display device
AssigneeJapan Display Inc.
InventorsHiroyuki Abe, Takayuki Suzuki
Life of this patent
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Abstract
Even when a light shielding film is provided between a transistor and a substrate, a threshold voltage of the transistor can be prevented or suppressed from being shifted. A display device includes light shielding films provided between a substrate and a semiconductor layer of a transistor including a gate electrode and the semiconductor layer. The semiconductor layer includes a source region and a drain region. Both of the light shielding films overlap the semiconductor layer when seen in a plan view, and are spaced apart from each other in a direction.
Claims7
A display device comprising:
- a transparent substrate including a first region and a second region provided outside the first region;
- a plurality of pixels provided in the first region in the transparent substrate;
- a thin film transistor provided in the second region in the transparent substrate;
- and
- a first light shielding film provided between the thin film transistor and the transparent substrate,
- wherein the thin film transistor includes:
- a semiconductor layer formed above the second region in the transparent substrate;
- and
- a first gate electrode and a second gate electrode formed above or below the semiconductor layer via a gate insulating film,
- the first gate electrode and the second gate electrode are spaced apart from each other when seen in a plan view,
- the semiconductor layer includes:
- a source region formed in a first portion of the semiconductor layer which is positioned on an opposite side to the second gate electrode across the first gate electrode when seen in a plan view;
- and
- a drain region formed in a second portion of the semiconductor layer which is positioned on an opposite side to the first gate electrode across the second gate electrode when seen in a plan view,
- the first light shielding film overlaps the semiconductor layer and overlaps the first gate electrode or the second gate electrode when seen in a plan view, and
- any one of a first end of the first gate electrode which is on the source region side, a second end of the first gate electrode which is on the drain region side, a third end of the second gate electrode which is on the source region side, and a fourth end of the second gate electrode which is on the drain region side is not arranged on the first light shielding film.
13 more elements
Dependencies are inferred from the claim text.