Sensor screen and display device including the same

Patent metadata

Field	Value
Publication number	US-10002278-B2
Application number	US-201615014551-A
Country	US
Kind code	B2
Filing date	Feb 3, 2016
Priority date	Feb 4, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A sensor screen and a display device including the same are discussed. The sensor screen can include a first base member including a first active area and a first bezel area and having a first thickness, a second base member positioned opposite the first base member and having a second thickness less than the first thickness; and a fingerprint sensor disposed on one of the first and second base members which are positioned opposite each other. The fingerprint sensor can include a first group of fingerprint electrodes, which are arranged in a first direction in a portion of the first active area, and a second group of fingerprint electrodes, which are insulated from the first group of fingerprint electrodes and are arranged in a second direction crossing the first direction.

First claim

What is claimed is:

1. A sensor screen comprising:
a first base member including a first active area having a first area and a second area, and a first bezel area outside the first active area, the first base member having a first thickness;
a second base member positioned opposite the first base member, the second base member having a second thickness less than the first thickness; and
a fingerprint sensor disposed in the first area on one of the first and second base members which are positioned opposite each other,
the fingerprint sensor including a first group of fingerprint electrodes, which are arranged in a first direction in a portion of the first active area, and a second group of fingerprint electrodes, which are insulated from the first group of fingerprint electrodes and are arranged in a second direction crossing the first direction.

2. The sensor screen of claim 1 , further comprising a flexible printed circuit board having a fingerprint integrated circuit (IC) mounted thereon,
the fingerprint IC being configured to supply a driving pulse to one group among the first and second groups of fingerprint electrodes and sense a voltage difference resulting from a touch operation through another group among the first and second groups of fingerprint electrodes.

3. The sensor screen of claim 2 , wherein the fingerprint sensor is entirely disposed in a portion having a predetermined width in the first active area,
wherein the flexible printed circuit board is a single flexible printed circuit board on which a plurality of fingerprint ICs are mounted,
wherein the first group of fingerprint electrodes are commonly connected to each of the plurality of fingerprint ICs through first wires, and
wherein the second group of fingerprint electrodes are divided into a same number of sub-groups as a number of the plurality of fingerprint ICs, and the sub-groups of fingerprint electrodes are respectively connected to the plurality of fingerprint ICs through second wires.

4. The sensor screen of claim 2 , wherein the fingerprint sensor is entirely disposed in a portion having a predetermined width in the first active area,
wherein the flexible printed circuit board is a single flexible printed circuit board on which a single fingerprint IC is mounted,
wherein the first group of fingerprint electrodes are respectively connected to the single fingerprint IC through first wires, and
wherein the second group of fingerprint electrodes are connected to the single fingerprint IC through jumping wires, each of which connects a predetermined number of second wires among second wires respectively connected to the second group of fingerprint electrodes.

5. The sensor screen of claim 2 , wherein the fingerprint sensor is entirely disposed in a portion having a predetermined width in the first active area,
wherein the flexible printed circuit board includes a first flexible printed circuit board on which first fingerprint IC is mounted and a second flexible printed circuit board on which a plurality of second fingerprint ICs are mounted,
wherein the first group of fingerprint electrodes are connected to the first fingerprint IC through first wires, and
wherein the second group of fingerprint electrodes are divided into a same number of sub-groups as a number of the plurality of second fingerprint ICs, and the sub-groups of fingerprint electrodes are respectively connected to the plurality of second fingerprint ICs.

6. The sensor screen of claim 2 , wherein the fingerprint sensor is entirely disposed in a portion having a predetermined width in the first active area,
wherein the flexible printed circuit board includes a first flexible printed circuit board on which a first fingerprint IC is mounted and a second flexible printed circuit board on which a second fingerprint IC is mounted,
wherein the first group of fingerprint electrodes are connected to the fingerprint IC through first wires,
wherein the second group of fingerprint electrodes are connected to the second fingerprint IC through jumping wires, each of which connects a predetermined number of second wires among second wires respectively connected to the second group of fingerprint electrodes.

7. The sensor screen of claim 2 , wherein the first group of fingerprint electrodes of the fingerprint sensor are entirely disposed in a portion having a predetermined width in the first active area, and the second group of fingerprint electrodes of the fingerprint sensor are partially disposed in a portion having a predetermined width in the first active area, and
wherein the flexible printed circuit board is a single flexible printed circuit board on which a single fingerprint IC is mounted,
wherein the first group of fingerprint electrodes are connected to the single fingerprint IC through first wires, and
wherein the second group of fingerprint electrodes are connected to the single fingerprint IC through second wires.

8. The sensor screen of claim 2 , wherein the first group of fingerprint electrodes of the fingerprint sensor are entirely disposed in a portion having a predetermined width in the first active area, and the second group of fingerprint electrodes of the fingerprint sensor are partially disposed in a portion having a predetermined width in the first active area, and
wherein the flexible printed circuit board includes a first flexible printed circuit board on which a first fingerprint IC is mounted, and a second flexible printed circuit board on which a second fingerprint IC is mounted,
wherein the first group of fingerprint electrodes are connected to the first finger print IC through first wires, and the second group of fingerprint electrodes are connected to the second finger print IC through second wires.

9. The sensor screen of claim 2 , wherein the first group of fingerprint electrodes of the fingerprint sensor serve as first touch electrodes and are entirely disposed in a portion having a predetermined width in the first active area, the second group of fingerprint electrodes of the fingerprint sensor are partially disposed in a portion having a predetermined width in the first active area, and at least one second touch electrode is disposed in a remaining area of the portion having the predetermined width,
wherein the flexible printed circuit board is a single flexible printed circuit board on which a single fingerprint-touch IC is mounted, and
wherein the single fingerprint-touch IC is connected to the first group of fingerprint electrodes through first wires, is connected to the second group of fingerprint electrodes through second wires, and is connected to the at least one second touch electrode through third wires.

10. The sensor screen of claim 2 , wherein the first group of fingerprint electrodes of the fingerprint sensor serve as first touch electrodes and are entirely disposed in a portion having a predetermined width in the first active area, the second group of fingerprint electrodes of the fingerprint sensor are partially disposed in a portion having a predetermined width in the first active area, and at least one second touch electrode is disposed in a remaining area of the portion having the predetermined width, and
wherein the flexible printed circuit board includes a first flexible printed circuit board on which a first fingerprint IC is mounted, and a second flexible printed circuit board on which a second fingerprint IC is mounted, and
wherein the first group of fingerprint electrodes are connected to the first fingerprint IC, wherein the second group of fingerprint electrodes are connected to the second fingerprint IC through second wires, and the at least one second touch electrode are connected to the second fingerpri

Assignees

• Lg Display Co Ltd

Inventors

• Song Moonbong
• Choo Kyoseop

Classifications

• G06F21/32

  using biometric data, e.g. fingerprints, iris scans or voiceprints · CPC title

• G06F1/1684

  Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• H05K2201/10151

  Sensor · CPC title

• H05K1/189

  characterised by the use of flexible or folded printed circuits · CPC title