US 2019/0155429 A1 · DRIVING CIRCUIT, DISPLAY PANEL, DISPLAY DEVICE, AND DRIVING METHOD

Abstract

Disclosed are a display panel and a display device which can sense a fingerprint. A photo-sensor is disposed within a sub-pixel, a voltage change of a pixel electrode according to a leakage current of the photo-sensor exposed to light is sensed, and a fingerprint is sensed, so that a fingerprint can be sensed in an active area of a display panel. Also, a voltage change of the pixel electrode is sensed using a common electrode without directly applying a driving voltage to the pixel electrode, so as to perform driving of the pixel electrode and light irradiation together, thereby enabling a reduction in a fingerprint sensing mode and detection of only the level of a leakage voltage during fingerprint sensing. Therefore, a sensing circuit can be efficiently configured, and sensing sensitivity can be improved.

Claims24

Dependent claims

A display device, comprising:

a gate line;
a data line;
a sub-pixel which is adjacent to the overlap location between the gate line and the data line;
a capacitor within the sub-pixel, the capacitor having a first electrode and a second electrode;
a transistor having a first node disposed within the sub-pixel and electrically connected to the data line, a second node electrically connected to the gate line, and a third node electrically connected to the first electrode;
a photo-sensor electrically connected between the first node and the third node of the transistor;
a light source configured to emit light;
a driving circuit configured to output a driving voltage to the capacitor;
and
a sensing circuit configured to sense a voltage of the first electrode through the data line.

7 more elements

Dependencies are inferred from the claim text.

Driving circuit, display panel, display device, and driving method

Life of this patent

Driving circuit, display panel, display device, and driving method

Life of this patent

Abstract

Claims24