Touch panel, fabricating method thereof and display device

Patent metadata

Field	Value
Publication number	US-11500490-B2
Application number	US-202017044034-A
Country	US
Kind code	B2
Filing date	Apr 16, 2020
Priority date	Apr 18, 2019
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

There is provided a touch panel, including: a substrate including a touch detection area and a fingerprint recognition area; plural touch detection units in the touch detection area, each touch detection unit including a touch detection electrode; plural fingerprint recognition units in the fingerprint recognition area, each fingerprint recognition unit including a fingerprint recognition electrode, and the fingerprint recognition electrode and the touch detection electrode being in a same layer; a signal wiring layer on a same side of the substrate as the touch detection electrode and the fingerprint recognition electrode and including plural first signal transmission lines and plural second signal transmission lines. The touch detection electrode is electrically coupled to and transmits a touch detection signal through a corresponding first signal transmission line, and the fingerprint recognition electrode is electrically coupled to and transmits a fingerprint recognition signal through a corresponding second signal transmission line.

First claim

What is claimed is:

1. A touch panel, comprising:
a substrate comprising a touch detection area and a fingerprint recognition area;
a plurality of touch detection units on the substrate and in the touch detection area, each touch detection unit comprising a touch detection electrode;
a plurality of fingerprint recognition units on the substrate and in the fingerprint recognition area, each fingerprint recognition unit comprising a fingerprint recognition electrode, and the fingerprint recognition electrode and the touch detection electrode being in a same layer;
a signal wiring layer on a same side of the substrate as the touch detection electrode and the fingerprint recognition electrode, and comprising a plurality of first signal transmission lines and a plurality of second signal transmission lines,
wherein the touch detection electrode is electrically coupled to a corresponding first signal transmission line and transmits a touch detection signal through the corresponding first signal transmission line;
the fingerprint recognition electrode is electrically coupled to a corresponding second signal transmission line and transmits a fingerprint recognition signal through the corresponding second signal transmission line, and
the touch panel further comprises a display function layer, wherein
the touch detection electrode, the fingerprint recognition electrode and the signal wiring layer are on a side of the display function layer proximal to the substrate; and
the display function layer comprises a plurality of gate lines, a plurality of data lines and a plurality of pixel units, each pixel unit corresponds to one gate line and one data line and comprises a pixel driving circuit and a light emitting device, the pixel driving circuit is configured to drive the light emitting device to emit light, the pixel driving circuit comprises a signal writing transistor, a gate of the signal writing transistor is coupled to the one gate line, and a first electrode of the signal writing transistor is coupled to the one data line.

2. The touch panel according to claim 1 , wherein the touch detection electrode in each of the plurality of touch detection units is a self-capacitive touch detection electrode; and
self-capacitive touch detection electrodes in the plurality of touch detection units are in one-to-one correspondence with the plurality of first signal transmission lines.

3. The touch panel according to claim 1 , wherein the touch detection electrode in each of the plurality of touch detection units comprises a first touch detection electrode and a second touch detection electrode;
the first touch detection electrode comprises a first sub-electrode and a second sub-electrode respectively on both sides of the second touch detection electrode, the first sub-electrode and the second sub-electrode are electrically coupled to each other through a bridge wire, and the bridge wire is insulated from the second touch detection electrode; and
one of the first touch detection electrode and the second touch detection electrode is a mutual capacitive touch scanning electrode, and the other of the first touch detection electrode and the second touch detection electrode is a mutual capacitive touch sensing electrode.

4. The touch panel according to claim 3 , wherein the plurality of touch detection units are arranged in an array, mutual capacitive touch scanning electrodes in a same row are electrically coupled to each other, and mutual capacitive touch sensing electrodes in a same column are electrically coupled to each other;
the plurality of first signal transmission lines comprise a plurality of touch scanning signal transmission lines and a plurality of touch sensing signal transmission lines, the mutual capacitive touch scanning electrodes in the same row are electrically coupled to a same touch scanning signal transmission line, the mutual capacitive touch scanning electrodes in different rows are electrically coupled to different touch scanning signal transmission lines, the mutual capacitive touch sensing electrodes in the same column are electrically coupled to a same touch sensing signal transmission line, and the mutual capacitive touch sensing electrodes in different columns are electrically coupled to different touch sensing signal transmission lines.

5. The touch panel according to claim 4 , wherein the bridge wire, the plurality of touch scanning signal transmission lines, and the plurality of touch sensing signal transmission lines are in a same layer.

6. The touch panel according to claim 1 , wherein the fingerprint recognition electrode in each of the plurality of fingerprint recognition units is a self-capacitive fingerprint recognition electrode; and
self-capacitive fingerprint recognition electrodes in the plurality of fingerprint recognition units are in one-to-one correspondence with the plurality of second signal transmission lines.

7. The touch panel according to claim 1 , wherein each fingerprint recognition unit further comprises a switching transistor;
in the fingerprint recognition unit, the fingerprint recognition electrode is electrically coupled to the corresponding second signal transmission line through the switching transistor, a gate of the switching transistor is coupled to a fingerprint scanning driving line corresponding to the fingerprint recognition electrode, a first electrode of the switching transistor is coupled to the second signal transmission line corresponding to the fingerprint recognition electrode, and a second electrode of the switching transistor is coupled to the fingerprint recognition electrode; and
the plurality of fingerprint recognition units are arranged in an array, fingerprint recognition electrodes in a same row correspond to a same fingerprint scanning driving line, fingerprint recognition electrodes in different rows correspond to different fingerprint scanning driving lines, fingerprint recognition electrodes in a same column correspond to a same second signal transmission line, and fingerprint recognition electrodes in different columns correspond to different second signal transmission lines.

8. The touch panel according to claim 1 , wherein orthographic projections of the plurality of data lines on the signal wiring layer cover the plurality of first signal transmission lines and the plurality of second signal transmission lines.

9. The touch panel according to claim 1 , wherein each fingerprint recognition unit further comprises a switching transistor;
in the fingerprint recognition unit, the fingerprint recognition electrode is electrically coupled to the corresponding second signal transmission line through the switching transistor, a gate of the switching transistor is coupled to a fingerprint scanning driving line corresponding to the fingerprint recognition electrode, a first electrode of the switching transistor is coupled to the second signal transmission line corresponding to the fingerprint recognition electrode, and a second electrode of the switching transistor is coupled to the fingerprint recognition electrode;
the plurality of fingerprint recognition units are arranged in an array, fingerprint recognition electrodes in a same row correspond to a same fingerprint scanning driving line, fingerprint recognition electrodes in different rows correspond to different fingerprint scanning driving lines, fingerprint recognition electrodes in a same column correspond to a same second signal transmission line, and fingerprint recognition electrodes in different columns correspond to different second signal transmission lines; and
the gate of the switching transistor and the gate of the signal writing transistor are in a same layer, an active layer of the switching transistor

Assignees

• Chongqing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Liu Jianfeng
• Yang Ni
• Chen Xuefang
• Hu Qi
• Zhao Qi

Classifications

• G06F3/04166 Primary

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06V40/1306 Primary

  non-optical, e.g. ultrasonic or capacitive sensing · CPC title