Proximity detection device, method of detecting proximity and electronic apparatus

• US 9,886,155 B2
• Filed: 11/02/2016
• Issued: 02/06/2018
• Est. Priority Date: 02/28/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Adachi, Koichiro
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US15/341,743
• Publication Number:
  US 20170060305A1
• Time in Patent Office: 461 Days
• Field of Search: 345173, 345174
• CPC Class Codes: G06F 2203/04108 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 Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

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.

Claims

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 pair of extending portions each having a zigzag structure and extending in a first direction based on overall shape of each extending portion; 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,

wherein a dummy pattern portion is disposed surrounded by the pair of extending portions and the pair of connector portions, the dummy pattern portion having a zigzag structure and extending in the first direction based on overall shape of the dummy pattern,

wherein each of the extending portions has a first bending angle with the first direction, and

wherein the dummy pattern portion has a second bending angle with the first direction,

wherein each of the extending portions has first slits of zigzag lines,

wherein the extending portions are divided by the first slits into first zigzag portions that are arranged by a first pitch in the second direction, and

wherein the first pitch is different from an arrangement pitch in the second direction of the pixel electrodes.

2. The proximity detection device according to claim 1,

wherein the first pitch is equal to or smaller than the arrangement pitch in the second direction of the pixel electrodes.

3. The proximity detection device according to claim 1,

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

4. The proximity detection device according to claim 3,

wherein each of the first bending angle and the second bending angle is in a range of 5 to 45 degrees.

5. 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 pair of extending portions each having a zigzag structure and extending in a first direction based on overall shape of each extending portion; 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,

wherein a dummy pattern portion is disposed surrounded by the pair of extending portions and the pair of connector portions, the dummy pattern portion having a zigzag structure and extending in the first direction based on overall shape of the dummy pattern,

wherein each of the extending portions has a first bending angle with the first direction, and

wherein the dummy pattern portion has a second bending angle with the first direction,

wherein the dummy pattern portion has second slits of zigzag lines,

wherein the dummy pattern portion is divided by the second slits into second zigzag portions that are arranged by a second pitch in the second direction, and

wherein the second pitch is different from an arrangement pitch in the second direction of the pixel electrodes.

6. The proximity detection device according to claim 5,

wherein the second pitch is equal to or smaller than the arrangement pitch in the second direction of the pixel electrodes.

7. The proximity detection device according to claim 5,

wherein the extending portions are divided into first zigzag portions by a plurality of first slits of zigzag lines,

wherein the dummy pattern portion is divided into second zigzag portions by the second slits of zigzag lines,

wherein each of the first slits and each of the second slits have a same width in the second direction,

and

wherein each of the first zigzag portions and the second zigzag portions have a same width in the second direction.

8. The proximity detection device according to claim 5,

wherein the dummy pattern portion is further disposed between the detection electrodes adjacent to each other.

9. The proximity detection device according to claim 5,

wherein the extending portions and the dummy pattern portions are disposed on a same plane.

10. The proximity detection device according to claim 5, wherein

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

11. The proximity detection device according to claim 10, wherein

wherein each of the first bending angle and the second bending angle is in a range of 5 to 45 degrees.

12. 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 pair of extending portions each having a zigzag structure and extending in a first direction based on overall shape of each extending portion; 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,

wherein a dummy pattern portion is disposed surrounded by the pair of extending portions and the pair of connector portions, the dummy pattern portion having a zigzag structure and extending in the first direction based on overall shape of the dummy pattern,

wherein each of the extending portions has a first bending angle with the first direction, and

wherein the dummy pattern portion has a second bending angle with the first direction, wherein the extending portions are divided into first zigzag portions by a plurality of first slits of zigzag lines, and

wherein each of the first zigzag portions have a width larger than a width of each of the first slits in the second direction.

13. The proximity detection device according to claim 12, wherein

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

14. The proximity detecting device according to claim 13, wherein

each of the first bending angle and the second bending angle is in a range of 5 to 45 degrees.