Proximity detection device, method of detecting proximity and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9235282-B2
Application number	US-201313740598-A
Country	US
Kind code	B2
Filing date	Jan 14, 2013
Priority date	Feb 28, 2012
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

A proximity detection device includes a display unit which has a display image surface in which a plurality of pixel electrodes are arranged in a matrix shape and a proximity operation detecting unit in which a transparent electrode for proximity operation detection is arranged to form an operation surface at a position superposed on the display image surface and a conductive film pattern forming the transparent electrode has a pitch of a linear pattern which is equal to or smaller than an arrangement pitch in one direction of the pixel electrodes.

First claim

The invention is claimed as follows:

1. A proximity detection device comprising:
a display unit which has a display image surface in which a plurality of pixel electrodes are arranged in a matrix shape; and
a proximity operation detecting unit in which a plurality of detection electrodes for proximity operation detection are arranged to form an operation surface at a position superposed on the display image surface,
wherein each of the detection electrodes has a square-shaped pattern including:
a pair of extending portions that extends in a first direction; and
a pair of connector portions that extends in a second direction different from the first direction, each of the pair of connector portions electrically connecting an end of one of the pair of extending portions to an end of the other one of pair of extending portions, and

a dummy pattern portion that is disposed inside the square-shaped pattern and that is surrounded by the pair of extending portions and the pair of connector portions,
wherein each of the extending portions has first slits of bending lines having a first bending angle,
wherein the dummy pattern portion is divided by second slits of bending lines having a second bending angle, and

wherein the first bending angle and the second bending angle are the same.

2. The proximity detection device according to claim 1 ,
wherein the extending portions are divided by the first slits into stripes which are arranged by a first pitch, the first pitch is equal to or smaller than an arrangement pitch in the one direction of the pixel electrodes.

3. A method of detecting proximity comprising
detecting a proximity operation by using a plurality of detection electrodes in a proximity detection device in which the detection electrodes for proximity operation detection are arranged to form an operation surface at a position superposed on a display image surface in which a plurality of the pixel electrodes are arranged in a matrix shape,
wherein each of the detection electrodes has a square-shaped pattern including:
a pair of extending portions that extends in a first direction; and
a pair of connector portions that extends in a second direction different from the first direction, each of the pair of connector portions electrically connecting an end of one of the pair of extending portions to an end of the other one of pair of extending portions, and

a dummy pattern portion, that is disposed inside the square-shaped pattern and that is surrounded by the pair of extending portions and the pair of connector portions,
wherein each of the extending portions has first slits of bending lines having a first bending angle,
wherein the dummy portion is divided by second slits of bending lines having a second bending angle, and
wherein the first bending angle and the second bending angle are the same.

4. An electronic apparatus including a proximity detection device, the proximity detection device comprising:
a display unit which has a display image surface in which a plurality of pixel electrodes are arranged in a matrix shape, and
a proximity operation detecting unit in which a plurality of detection electrodes for proximity operation detection are arranged to form an operation surface at a position superposed on the display image surface,
wherein each of the detection electrodes has a square-shaped pattern including:
a pair of extending portions that extends in a first direction; and
a pair of connector portions that extends in a second direction different from the first direction, each of the pair of connector portions electrically connecting an end of one of the pair of extending portions to an end of the other one of pair of extending portions; and
a dummy pattern portion that is disposed inside the square-shaped pattern and that is surrounded by the pair of extending portions and the pair of connector portions,

wherein each of the extending portions has first slits of bending lines having a first bending angle,
wherein the dummy pattern portion is divided by second slits of bending lines having a second bending angle, and
wherein the first bending angle and the second bending angle are the same.

5. The proximity detection device according to claim 1 ,
wherein the dummy pattern portion extends in the first direction,
each of the first slits and each of the second slits have a same width in the second direction, and
each of the extending portions and the dummy pattern portion have a same width in the second direction.

6. The proximity detection device according to claim 1 ,
wherein each of the extending portions have a width larger than a width of each of the first slits.

7. The proximity detection device according to claim 1 ,
wherein the dummy pattern portion is further disposed between adjacent extending portions.

8. The proximity detection device according to claim 1 ,
wherein the extending portions and the dummy pattern portions are disposed on a same plane.

Assignees

• Japan Display Inc

Inventors

• Adachi Koichiro

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04101

  2.5D-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 and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title