Touch screen having fingerprint recognition function and display device having the same

A display device comprising:

• a first substrate comprising a plurality of pixel areas;
• display elements arranged in the pixel areas on the first substrate;
• a second substrate facing the first substrate and including an active area and a non-active area arranged to be adjacent to the active area, the active area including at least one fingerprint recognition area;
• and
• a touch screen arranged on one surface of the second substrate,
• wherein the touch screen comprises:
• touch sensing electrodes including first sensing electrodes arranged in the active area, and at least one second sensing electrode arranged in the fingerprint recognition area, the at least one second sensing electrode configured for sensing a touch and recognizing a fingerprint;
• and
• a pad portion including a plurality of pads which are electrically connected to respective sensing electrodes,
• wherein the at least one second sensing electrode comprises:
• a plurality of sub electrodes extending in a direction parallel to an edge portion of the active area;
• and
• a plurality of fingerprint recognition lines connecting the plurality of sub electrodes to the pad portion,
• wherein the plurality of fingerprint recognition lines arranged in a same fingerprint recognition area extend in a same direction,
• wherein the first sensing electrodes comprise a plurality of row (X) electrodes and a plurality of column (Y) electrodes extending in respective directions intersecting each other,
• wherein the plurality of sub electrodes extend in a direction parallel to at least one of the X electrodes and the Y electrodes,
• wherein a wiring density of the plurality of sub electrodes is greater than a wiring density of the X electrodes and a wiring density of the Y electrodes,
• wherein the fingerprint recognition lines and the plurality of sub electrodes are disposed on different layers from each other and connected to each other through contact holes in the fingerprint recognition area, and
• wherein the plurality of fingerprint recognition lines extend in a direction intersecting the plurality of sub electrodes.

A touch screen comprising:

• a substrate including an active area and a non-active area arranged to be adjacent to the active area, the active area including at least one fingerprint recognition area;
• touch sensing electrodes including first sensing electrodes arranged in the active area and at least one second sensing electrode arranged in the fingerprint recognition area, the at least one second sensing electrode configured for sensing a touch and recognizing a fingerprint;
• and
• a pad portion including a plurality of pads which is electrically connected to respective sensing electrodes,
• wherein the at least one second sensing electrode comprises:
• a plurality of sub electrodes extending in one direction;
• and
• a plurality of fingerprint recognition lines connecting the plurality of sub electrodes to the pad portion,
• wherein the plurality of fingerprint recognition lines arranged in a same fingerprint recognition area extend in a same direction,
• wherein the first sensing electrodes comprise a plurality of row (X) electrodes and a plurality of column (Y) electrodes extending in respective directions intersecting each other,
• wherein the plurality of sub electrodes extend in a direction parallel to at least one of the X electrodes and the Y electrodes,
• wherein a wiring density of the plurality of sub electrodes is greater than a wiring density of the X electrodes and a wiring density of the Y electrodes,
• wherein the plurality of fingerprint recognition lines and the plurality of sub electrodes are disposed on different layers from each other and connected to each other through contact holes in the fingerprint recognition area, and
• wherein the plurality of fingerprint recognition lines extend in a direction intersecting the plurality of sub electrodes.