Touch sensing unit, display device including the touch sensing unit, and method of aging the touch sensing unit
AssigneeSamsung Display Co., Ltd.
InventorsChan Wook Shim, Sang Hyuk Kwon, Jong Yeul Park, Jae Yoon Jung, Duc Han Cho, Cheol Gon Choi
Life of this patent
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Abstract
A touch sensing unit includes a base layer including a touch sensing area and a touch peripheral area, a touch electrode disposed in the touch sensing area, a touch line disposed in the touch peripheral area and electrically connected to the touch electrode, an inspection pad disposed in a pad area located at one side of the touch peripheral area, and an inspection thin film transistor disposed in the pad area and electrically connected to the touch line and the inspection pad.
Claims19
A touch sensing unit, comprising:
- a base layer including a touch sensing area and a touch peripheral area;
- a touch electrode disposed in the touch sensing area;
- a touch line disposed in the touch peripheral area and electrically connected to the touch electrode;
- an inspection pad disposed in a pad area located at one side of the touch peripheral area;
- and
- an inspection thin film transistor disposed in the pad area and electrically connected to the touch line and the inspection pad,
- wherein the touch line includes a plurality of touch lines sequentially arranged in a first direction in the pad area, and
- the inspection thin film transistor is disposed on only odd-numbered touch lines of the plurality of touch lines.
A display device, comprising:
- a substrate including a display area and a non-display area;
- a thin film transistor layer disposed on the substrate and including a driving thin film transistor and an inspection thin film transistor;
- a light emitting element layer disposed on the thin film transistor layer;
- and
- a touch sensing unit disposed on the light emitting element layer,
- wherein the driving thin film transistor is disposed in the display area, and the inspection thin film transistor is disposed in the non-display area and on the same layer as the driving thin film transistor.
A method of aging a touch sensing unit, comprising:
- applying a gate-off voltage to a first node inspection pad connected to a first node;
- and
- inputting first aging signals to inspection pads connected to a plurality of touch lines to form a potential difference between the plurality of touch lines,
- wherein inspection thin film transistors are connected to touch lines of the plurality of touch lines, and
- each inspection pad is connected to a source/drain electrode of at most one of the inspection thin film transistors.
Dependencies are inferred from the claim text.