Touch detection device, display device with touch detection function, and control method thereof

Patent metadata

Field	Value
Publication number	US-2017242541-A1
Application number	US-201715432257-A
Country	US
Kind code	A1
Filing date	Feb 14, 2017
Priority date	Feb 19, 2016
Publication date	Aug 24, 2017
Grant date	—

Abstract

According to an aspect, a touch detection device includes: first detectors that output first signal values corresponding to contact of detection target objects with first regions; at least one second detector that outputs at least one second signal value corresponding to at least one first force applied by the detection target objects to press at least one second region corresponding to the first regions; and a controller that calculates at least one third signal value corresponding to at least one second force applied by at least one of the detection target objects to the at least one second region, based on the first signal values, the at least one second signal value, and at least one reference value corresponding to a third force per at least one of the first signal values.

First claim

What is claimed is:

1 . A touch detection device comprising:
a plurality of first detectors configured to output a plurality of first signal values corresponding to contact of a plurality of detection target objects with a plurality of first regions; at least one second detector configured to output at least one second signal value corresponding to at least one first force applied by the plurality of detection target objects to press at least one second region corresponding to the plurality of first regions; and a controller configured to calculate at least one third signal value corresponding to at least one second force applied by at least one of the plurality of detection target objects to the at least one second region, based on the plurality of first signal values, on the at least one second signal value, and on at least one reference value corresponding to a third force per at least one of the plurality of first signal values detected from at least one of the plurality of first regions.

2 . The touch detection device according to claim 1 ,
wherein the plurality of first detectors are each configured to output one of the plurality of first signal values corresponding to contact of the plurality of detection target objects with one of the plurality of first regions.

3 . The touch detection device according to claim 1 , wherein the at least one second detector is each configured to output one of the at least one second signal value corresponding to one of the at least one first force applied by the plurality of detection target objects to one of the at least one second region.

4 . The touch detection device according to claim 1 ,
further comprising a plurality of first electrodes, wherein the plurality of first electrodes are each configured to: serve as one of the plurality of first detectors to output one of the plurality of first signal values, and serve as one of the at least one second detector to output one of the at least one second signal value.

5 . The touch detection device according to claim 1 , wherein each of the plurality of first regions is smaller than one of the at least one second region.

6 . The touch detection device according to claim 1 , wherein
the at least one second detector is a plurality of second detectors, the plurality of second detectors are configured to output a plurality of second signal values corresponding to a plurality of first forces applied by the plurality of detection target objects to a plurality of second regions corresponding to the plurality of first regions, and the controller is configured to calculate a plurality of third signal values corresponding to a plurality of second forces applied by at least one of the plurality of detection target objects to the plurality of second regions, based on the plurality of first signal values, on the plurality of second signal values, and on the at least one reference value.

7 . The touch detection device according to claim 1 , wherein
the at least one reference value includes a plurality of sub-reference values, the plurality of sub-reference values each correspond to a type of each of the plurality of detection target objects, and the controller comprises:
a detection target object type determinator configured to determine the type of each of the plurality of detection target objects based on the plurality of first signal values detected from the plurality of first regions; and
a force calculator configured to calculate the at least one third signal value, based on at least one of the plurality of sub-reference values corresponding to the type of each of the plurality of detection target objects determined by the detection target object type determinator, on the plurality of first signal values, and on the at least one second value.

8 . The touch detection device according to claim 1 , wherein
the at least one third signal value is a plurality of third signal values, the at least one reference value includes a first sub-reference value corresponding to a first type object of the plurality of detection target objects, and the controller comprises:
a detection target object type determinator configured to determine, based on the plurality of first signals,
a first object region with which the first type object of the plurality of detection target objects is in contact, and
a second object region with which a second type object of the plurality of detection target objects contacts is in contact; and
a force calculator configured to calculate one of the plurality of third signal values for the first object region, based on the plurality of first signal values and on the first sub-reference value, and to calculate another of the plurality of third signal values for the second object region, based on the at least one second signal value, and on the one of the plurality of third signal values for the first object region.

9 . The touch detection device according to claim 8 , wherein a first change rate of the third force of the first type object is relatively smaller than a second change rate of the third force of the second type object.

10 . The touch detection device according to claim 1 , wherein the controller comprises a reference acquiring unit configured to calculate the at least one reference value based on the plurality of first signal values and on the at least one second signal value.

11 . A display device with a touch detection function comprising:
a plurality of first detectors configured to output a plurality of signal values corresponding to contact of a plurality of detection target objects with a plurality of first regions; a display unit configured to display an image toward an input surface; at least one second detector configured to output at least one second signal value corresponding to at least one first force applied by the plurality of detection target objects to press at least one second region corresponding to the plurality of first regions; and a controller configured to calculate at least one third signal value corresponding to at least one second force applied by at least one of the plurality of detection target objects to the at least one second region, based on the plurality of first signal values, on the at least one second signal value, and on at least one reference value corresponding to a third force per at least one of the plurality of first signal values detected from at least one of the plurality of first regions.

12 . The display device with a touch detection function according to claim 11 ,
further comprising a plurality of first electrodes, wherein the plurality of first electrodes are each configured to:
serve as one of the plurality of first detectors to output one of the plurality of first signal values, and
serve as one of the at least one second detector to output one of the at least one second signal value.

13 . The display device with a touch detection function according to claim 11 , wherein each of the plurality of first regions is smaller than one of the at least one second region.

14 . The display device with a touch detection function according to claim 11 , wherein
the at least one second detector is a plurality of second detectors, the plurality of second detectors are configured to output a plurality of second signal values corresponding to a plurality of first forces applied by the plurality of detection target objects to a plurality of second regions corresponding to the plurality of first regions, and the controller is configured to calculate a plurality of third signal values corresponding to a plurality of second forces a

Assignees

• Japan Display Inc

Inventors

• Iuchi Shinya
• Togashi Masahiro
• Kurasawa Hayato
• Yamamoto Michio
• Nagai Tatsunori

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• G06F2203/04108

  Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction · CPC title

• G06F2203/04104

  Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger · CPC title