Touch display panel having fingerprint recognition device integrated therewith and touch display device including same

Patent metadata

Field	Value
Publication number	US-10739900-B2
Application number	US-201715562313-A
Country	US
Kind code	B2
Filing date	Jul 26, 2017
Priority date	Jun 29, 2017
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A touch display panel includes touch detection electrodes and fingerprint recognition electrodes that share a common electrode layer. The pixel electrodes function as a drive pixel layer to induce capacitive coupling with respect to the fingerprint recognition electrodes, based on which operations of displaying, touch detection, and fingerprint recognition are carried out in a time sharing manner. The touch display panel requires no integration of separately made fingerprint recognition device and a touch display panel, and fingerprint detection can be realized with an existing layered structure of the touch display panel to thereby effectively save the manufacturing cost of the touch display device and achieve an effect of integrating a fingerprint recognition device and a touch display panel. A touch display device that includes the touch display panel is also provided.

First claim

What is claimed is:

1. A touch display panel, comprising a touch detection zone and a fingerprint recognition zone, the fingerprint recognition zone being located in the touch detection zone, the touch detection zone comprising a plurality of touch detection units in the form of first rectangular blocks arranged in an array, the touch detection units being connected, through first signal transmission lines respectively connected therewith, to a driver integrated circuit, the fingerprint recognition zone comprising a plurality of fingerprint recognition units in the form of second rectangular blocks arranged in an array, the fingerprint recognition units being connected, through second signal transmission lines respectively connected therewith, to the driver integrated circuit, the driver integrated circuit being operable to drive, in a time sharing manner, the touch detection units and the fingerprint recognition units to carry out, in a time sharing manner, operations of displaying, touch detection, and fingerprint recognition;
wherein the touch display panel comprises a pixel structure layer and a common electrode layer insulated from each other; the pixel structure layer comprises a plurality of pixel units arranged in an array, each of the plurality of pixel electrode units having a surface; and the touch detection units and the fingerprint recognition units share the common electrode layer, wherein the plurality of fingerprint recognition units are arranged to correspond to at least multiple pixel units of the plurality of pixel units, such that each of the plurality of fingerprint recognition units corresponds to a single pixel unit of the at least multiple pixel units and each of the plurality of fingerprint recognition units comprises a fingerprint recognition electrode that has a surface facing the surface of the single pixel unit of the at least multiple pixel units, the surface of the fingerprint recognition electrode being larger than and completely covering the surface of the single pixel unit of the at least multiple pixel units so as to induce capacitance coupling between the surface of the pixel unit and the surface of the fingerprint recognition electrode of the fingerprint recognition unit.

2. The touch display panel as claimed in claim 1 , wherein the pixel structure layer and the common electrode layer are operated in cooperation with each other to achieve, in a time sharing manner, the operations of displaying, touch detection, and fingerprint recognition.

3. The touch display panel as claimed in claim 2 , wherein in the operation of fingerprint recognition, the pixel electrodes arranged in the pixel units function as a drive pixel layer, which induces capacitive coupling with respect to the fingerprint recognition electrodes arranged in the fingerprint recognition units, the driver integrated circuit acquiring information of fingerprint feature by detecting information of capacitance variation of the fingerprint recognition units.

4. The ouch display panel as claimed in claim 1 , wherein each of the touch detection units is corresponding to and connected with each of the first signal transmission lines, and each of the fingerprint recognition units is corresponding to and connected with each of the second signal transmission lines.

5. The touch display panel as claimed in claim 1 , wherein when the driver integrated circuit drives the touch detection units, the driver integrated circuit drives the touch detection units to transmit a common voltage signal and a touch detection signal in a time sharing manner.

6. The touch display panel as claimed in claim 1 , wherein among the fingerprint recognition units that are located in the fingerprint recognition zone and arranged in an array, the fingerprint recognition units that are set in one common column are connected to each other and a last one of the fingerprint recognition units of the column is connected, through the second signal transmission line, to the driver integrated circuit.

7. A touch display device, comprising a touch display panel, wherein the touch display panel comprises a touch detection zone and a fingerprint recognition zone, the fingerprint recognition zone being located in the touch detection zone; the touch detection zone comprises a plurality of touch detection units in the form of first rectangular blocks arranged in an array, the touch detection units being connected through first signal transmission lines respectively connected therewith, to a driver integrated circuit; the fingerprint recognition zone comprises a plurality of fingerprint recognition units in the form of first rectangular blocks arranged in an array, the fingerprint recognition units being connected, through second signal transmission lines respectively connected therewith, to the driver integrated circuit; and the driver integrated circuit is operable to drive, in a time sharing manner, the touch detection units and the fingerprint recognition units to carry out, in a time sharing manner, operations of displaying, touch detection, and fingerprint recognition;
wherein the touch display panel comprises a pixel structure layer and a common electrode layer insulated from each other; the pixel structure layer comprises a plurality of pixel units arranged in an array, each of the plurality of pixel electrode units having a surface; and the touch detection units and the fingerprint recognition units share the common electrode layer, wherein the plurality of fingerprint recognition units are arranged to correspond to at least multiple pixel units of the plurality of pixel units, such that each of the plurality of fingerprint recognition units corresponds to a single pixel unit of the at least multiple pixel units and each of the plurality of fingerprint recognition units comprises a fingerprint recognition electrode that has a surface facing the surface of the single pixel unit of the at least multiple pixel units, the surface of the fingerprint recognition electrode being larger than and completely covering the surface of the single pixel unit of the at least multiple pixel units so as to induce capacitance coupling between the surface of the pixel unit and the surface of the fingerprint recognition electrode of the fingerprint recognition unit.

8. The touch display device as claimed in claim 7 , wherein the pixel structure layer and the common electrode layer are operated in cooperation with each other to achieve, in a time sharing manner, the operations of displaying, touch detection, and fingerprint recognition.

9. The touch display device as claimed in claim 8 , wherein in the operation of fingerprint recognition, the pixel electrodes arranged in the pixel units function as a drive pixel layer, which induces capacitive coupling with respect to the fingerprint recognition electrodes arranged in the fingerprint recognition units, the driver integrated circuit acquiring information of fingerprint feature by detecting information of capacitance variation of the fingerprint recognition units.

10. The touch display device as claimed in claim 7 , wherein each of the touch detection units is corresponding to and connected with each of the first signal transmission lines, and each of the fingerprint recognition units is corresponding to and connected with each of the second signal transmission lines.

11. The touch display device as claimed in claim 7 , wherein when the driver integrated circuit drives the touch detection units, the driver integrated circuit drives the touch detection units to transmit a common voltage signal and a touch detection signal in a time sharing manner.

12. The touch display device as claimed in claim 7 , wherein among the fing

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Li Man
• Zuo Qingcheng
• Yuan Xiaoling

Classifications

• G06V40/1306

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

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F3/041661

  using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window · CPC title

• G06F3/04164

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