Silicon Display Technology

Bong Yeob Hong

Ji Ho Hur

Ki Joong Kim

Youn Duck Nam

Yong Ju Ham

Moon Hyo Kang

Hyo Jun Kim

Jin Hyeong Yoo

Yong Kuk Kim

The present invention relates to a capacitive fingerprint sensor, and the capacitive fingerprint sensor includes: a fingerprint sensor electrode for sensing a fingerprint of a human body; a first transistor of which a current or an output voltage is changed according to a voltage change of capacitive coupling formed by fingerprint capacitance formed when a fingerprint contacts the fingerprint sensor electrode and coupling capacitance formed for capacitive coupling; a fifth transistor that resets a gate electrode of the first transistor and applies capacitive coupling to the gate electrode of the first transistor through a coupling pulse; a second transistor of which a current or an output voltage is changed due to a difference in the current flowing through the first transistor and a gate voltage is maintained by a capacitor; a third transistor that resets a gate electrode of the second transistor; and a fourth transistor that controls a current flowing through the second transistor or an output voltage of the second transistor and transmits the controlled current or output voltage to a readout circuit.

Capacitive fingerprint sensor

Provided is a fingerprint recognition sensor capable of sensing a fingerprint using optical and capacitive methods, the sensor including: a capacitive fingerprint sensing unit that includes a transistor (T) in which a flowing current is changed depending on an output voltage of a fingerprint sensing electrode capable of sensing the humans fingerprint; and an optical fingerprint sensing unit which changes the flowing current in the transistor (T) due to a difference in reverse current of a photodiode generated by light and shade depending on existence or non-existence of the fingerprint.

Fingerprint recognition sensor capable of sensing fingerprint using optical and capacitive method

Provided is a intensified sensor array for static electricity having a structure in which a static electricity preventing wiring covers an upper surface of a pixel circuit to cut off static electricity, so when static electricity of a high voltage is momentarily generated, the static electricity induced through the static electricity preventing wiring is discharged, thereby being capable of effectively protecting the pixel circuit of a lower part from the static electricity.

Intensified sensor array for static electricity

Provided is a transparent fingerprint recognizing sensor array, including: a pixel driving circuit formed on a substrate; an antistatic wiring disposed in an upper part of the pixel driving circuit; and a pixel electrode connected to the pixel driving circuit, wherein the pixel electrode is made of a transparent material or has an open formed in a center part thereof.

Growing community of inventors

Hwaseong-si, South Korea

Bong Yeob Hong