Position detecting device

Patent metadata

Field	Value
Publication number	US-10606424-B2
Application number	US-201815872632-A
Country	US
Kind code	B2
Filing date	Jan 16, 2018
Priority date	Apr 30, 2014
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

The invention allows size reduction of a sensor of a position detecting device of a capacitive system, which detects a position indicated by an indicator. The sensor has plural electrode conductors that are disposed adjacent to each other and are configured to receive a signal from the indicator on a first surface of a substrate having the first surface and a second surface opposed to each other. The position detecting device includes a signal processing circuit including a differential amplifier circuit that calculates a difference between signals from at least two of the plural electrode conductors. Plural connecting lines are formed on the second surface of the substrate. The plural connecting lines each have one end connected to one of the plural electrode conductors disposed on the first surface by a through-hole or a via formed through the substrate, and the other end connected to a line-concentrated part.

First claim

The invention claimed is:

1. A device for detecting a position of an object in a detection area, comprising:
a panel providing a horizontal surface defined by a first direction and a second direction perpendicular to each other;
an electrode layer arranged underneath the panel and formed of a plurality of block-shaped conductor patterns laid within the detection area, wherein the plurality of block-shaped conductor patterns are offset from each other along the first direction to respectively detect different positions along the first direction;
a wiring layer arranged underneath the electrode layer and formed of a plurality of routing lines extending respectively from underneath the plurality of block-shaped conductor patterns within the detection area toward a collection area outside the detection area, wherein the plurality of routing lines extend in the first direction parallel to the horizontal surface;
vias that are positioned within the detection area and that respectively connect the plurality of block-shaped conductor patterns to the plurality of routing lines, wherein the vias extend in a third direction perpendicular to the horizontal surface; and
circuitry which is coupled to the collection area and which, in operation, detects the position of the object in the detection area based on electric charges respectively induced in the plurality of block-shaped conductor patterns.

2. The device of claim 1 , wherein each of the vias is positioned within an area of each of the plurality of block-shaped conductor patterns.

3. The device of claim 1 , wherein the routing lines extend in the first direction perpendicular to a peripheral edge of the detection area which extends along the second direction.

4. The device of claim 3 , wherein the routing lines are grouped into bundles.

5. The device of claim 1 , wherein the object is an active pen configured to transmit electric signals, and the plurality of block-shaped conductor patterns laid in the electrode layer constitute a shield for the routing lines arranged in the wiring layer underneath the electrode layer.

6. The device of claim 1 , wherein the plurality of block-shaped conductor patterns are grouped into a plurality of subsets, and the plurality of subsets are offset from each other along the first direction to respectively detect a plurality of the different positions along the first direction.

7. The device of claim 6 , wherein the electrode layer further includes a plurality of conductor patterns offset from each other along the second direction to respectively detect different positions along the second direction.

8. The device of claim 1 , comprising a display, wherein the panel is arranged underneath the display.

Assignees

• Wacom Co Ltd

Inventors

• Hara Hideyuki

Classifications

• G01D9/10

  the recording element, e.g. stylus, being controlled in accordance with the variable, and the recording medium, e.g. paper roll, being controlled in accordance with time · 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

• G06F3/0488

  using a touch-screen or digitiser, e.g. input of commands through traced gestures · CPC title

• G01D5/24

  by varying capacitance · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title