Touch control apparatus with fingerprint identification function

Patent metadata

Field	Value
Publication number	US-10360427-B2
Application number	US-201615176168-A
Country	US
Kind code	B2
Filing date	Jun 8, 2016
Priority date	Jun 10, 2015
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A touch control apparatus with fingerprint identification function includes a substrate body with a visible region, a plurality of first primary electrodes, a plurality of second primary electrodes, and a fingerprint identification region located in the visible region. The first primary electrodes and the second primary electrodes are mounted in the visible region for sensing a touch coordinate when an object touches on the visible region. The first secondary electrodes are crossly arranged and insulated from the second secondary electrodes in the fingerprint, identification region. Further, a part of the first primary electrodes and the second primary electrodes are extended to the fingerprint identification region. When a user performs a fingerprint identification function, all electrodes in the fingerprint identification region are used to detect and identify the user's fingerprint.

First claim

What is claimed is:

1. A touch control apparatus with fingerprint identification function, comprising:
a substrate body having a visible region;
a plurality of first primary electrodes crossing and insulated from a plurality of second primary electrodes in the visible region; and
a fingerprint identification region located in the visible region, wherein:
a plurality of first secondary electrodes cross and are insulated from a plurality of second secondary electrodes in the fingerprint identification region,
each of the first secondary electrodes is arranged in parallel with the first primary electrodes,
there is no electrical connection between the first primary electrodes and the first secondary electrodes,
each of the second secondary electrodes is arranged in parallel with the second primary electrodes,
there is no electrical connection between the second primary electrodes and the second secondary electrodes,
an arrangement density of the first secondary electrodes and the second secondary electrodes is higher than an arrangement density of the first primary electrodes and the second primary electrodes,
a portion of at least some of the first primary electrodes and a portion of at least some of the second primary electrodes are present in the fingerprint identification region,
a line width of each portion of the at least some of the first primary electrodes present in the fingerprint identification region is less than a line width of a second portion of each of the at least some of the first primary electrodes not present in the fingerprint identification region,
a line width of each portion of the at least some of the second primary electrodes present in the fingerprint identification region is less than a line width of a second portion of each of the at least some of the second primary electrodes not present in the fingerprint identification region, and
a line width of each first secondary electrode is less than the line width of each portion of the at least some of the first primary electrodes present in the fingerprint identification region, and
a line width of each second secondary electrode is less than the line width of each portion of the at least some of the second primary electrodes present in the fingerprint identification region.

2. The touch control apparatus with fingerprint identification function in claim 1 , wherein:
a line spacing between two adjacent first secondary electrodes of the first secondary electrodes corresponds to a first distance,
a line spacing between two adjacent second secondary electrodes of the second secondary electrodes corresponds to the first distance,
a line spacing between two adjacent first primary electrodes of the first primary electrodes corresponds to a second distance,
a line spacing between two adjacent second primary electrodes corresponds to the second distance,
a ratio between the first distance and the second distance is from 1:50 to 1:100.

3. The touch control apparatus with fingerprint identification function in claim 1 , wherein:
a line spacing between two adjacent first secondary electrodes of the first secondary electrodes is from 30 micrometers to 200 micrometers, and
a line spacing between two adjacent second secondary electrodes of the second secondary electrodes is from 30 micrometers to 200 micrometers.

4. The touch control apparatus with fingerprint identification function in claim 1 , wherein:
multiple of the first secondary electrodes are arranged at intervals between two adjacent first primary electrodes, and
multiple of the second secondary electrodes are arranged at intervals between two adjacent second primary electrodes.

5. The touch control apparatus with fingerprint identification function in claim 1 , wherein:
each of the first primary electrodes having a portion present in the fingerprint identification region and a second portion not present in the fingerprint identification region or each of the second primary electrodes having a portion present in the fingerprint identification region and a second portion not present in the fingerprint identification region comprises:
a first line segment with a first line width present in the fingerprint identification region; and
a second line segment with a second line width not present in the fingerprint identification region and connected to the first line segment, and

the second line width is greater than the first line width.

6. The touch control apparatus with fingerprint identification function in claim 5 , wherein a ratio between the first line width and the second line width is from 1:10 to 9:10.

7. The touch control apparatus with fingerprint identification function in claim 6 , wherein the first line width is from 0.01 micrometers to 200 micrometers, and the second line width is from 1 micrometer to 2 millimeters.

8. The touch control apparatus with fingerprint identification function in claim 1 , wherein:
an area of the fingerprint identification region is less than an area of the visible region, and
the fingerprint identification region is located at one side of the visible region.

9. The touch control apparatus with fingerprint identification function in claim 1 , wherein the first primary electrodes, the second primary electrodes, the first secondary electrodes, and the second secondary electrodes are electrically connected to a control circuit.

10. The touch control apparatus with fingerprint identification function in claim 1 , wherein:
the first primary electrodes and the second primary electrodes are electrically connected to a touch control circuit, and
the first secondary electrodes and the second secondary electrodes are electrically connected to a fingerprint identification control circuit.

11. The touch control apparatus with fingerprint identification function in claim 10 , wherein:
when the first primary electrode is driven, two of the first secondary electrodes adjacent to the first primary electrode being driven are simultaneously driven, and
when the second primary electrode is driven, two of the second secondary electrodes adjacent to the second primary electrode being driven are simultaneously driven.

12. The touch control apparatus with fingerprint identification function in claim 10 , wherein:
the substrate body includes a lower substrate and an upper substrate-adhered with the lower substrate, and
the fingerprint identification control circuit, the first secondary electrodes, and the second secondary electrodes are disposed on a surface of the lower substrate facing the upper substrate.

13. The touch control apparatus with fingerprint identification function in claim 12 , wherein the first primary electrodes and the second primary electrodes are disposed on a surface of the upper substrate facing the lower substrate.

14. The touch control apparatus with fingerprint identification function in claim 10 , wherein:
the substrate body includes a lower substrate and an upper substrate adhered with the lower substrate, and
the fingerprint identification control circuit, the first primary electrodes, the second primary electrodes, the first secondary electrodes, and the second secondary electrodes are disposed on a surface of the lower substrate facing the upper substrate.

15. The touch control apparatus with fingerprint identification function in claim 10 , wherein:
the substrate body is a single substrate, and
the fingerprint identification control circuit, the first primary electrodes, the second primary electrodes, the first secondary electrodes, and the second secondary electrodes are disposed on a surface of th

Assignees

• Tpk Touch Solutions Xiamen Inc

Inventors

• Lee Yuh-Wen
• Jiang Yau-Chen
• Xie Yanjun
• Lai Bin
• Wu Chengzhi

Classifications

• G06K9/0002 Primary

  Physics · mapped topic

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title