Sensor-equipped display device

Patent metadata

Field	Value
Publication number	US-2016349907-A1
Application number	US-201615162771-A
Country	US
Kind code	A1
Filing date	May 24, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

According to one embodiment, a sensor-equipped display device includes a display panel, a detection electrode, a conductive member arranged at intervals from the display panel and the detection electrode, and controller. In a first sense period, the controller drives a common electrode of the display panel or the detection electrode and extracts input position data from the detection electrode. In a second sense period, the controller drives the conductive member and extracts first input pressure data from a first electrode, the controller drives a second electrode and extracts second input pressure data from the conductive member, or the controller drives a third electrode and extracts third input pressure data from the third electrode.

First claim

What is claimed is:

1 . A sensor-equipped display device comprising:
a display panel comprising a common electrode; a detection electrode; a conductive member arranged at intervals from the display panel and the detection electrode; and a controller, wherein in a display period during which an image is displayed, the controller drives the common electrode, in a first sense period which is different from the display period, the controller drives the common electrode or the detection electrode and extracts input position data from the detection electrode, and in a second sense period which is different from the display period and the first sense period, the controller drives the conductive member and extracts, from a first electrode which is any one of the common electrode and the detection electrode, first input pressure data based on a variation in a first distance between the conductive member and the first electrode, or the controller drives a second electrode which is any one of the common electrode and the detection electrode and extracts, from the conductive member, second input pressure data based on a variation in a second distance between the second electrode and the conductive member, or the controller drives a third electrode which is any one of the common electrode and the detection electrode and extracts, from the third electrode, third input pressure data based on a variation in a third distance between the third electrode and the conductive member.

2 . The sensor-equipped display device of claim 1 , wherein
when the controller extracts the second input pressure data from the conductive member, the controller writes a second write signal to the common electrode, produces a second sensor signal between the common electrode and the conductive member and reads, from the conductive member, a second read signal indicating a variation in the second sensor signal based on the variation in the second distance.

3 . The sensor-equipped display device of claim 1 , wherein
when the controller extracts the third input pressure data from the common electrode, the controller writes a third write signal to the common electrode, produces a third sensor signal between the common electrode and the conductive member and reads, from the common electrode, a third read signal indicating a variation in the third sensor signal based on the variation in the third distance.

4 . The sensor-equipped display device of claim 3 , wherein
the conductive member is set at ground potential when the controller extracts the third input pressure data from the common electrode.

5 . The sensor-equipped display device of claim 1 , further comprising a backlight unit which emits light toward the display panel and comprises:
a light guide opposed to the display panel at an interval from the display panel and located between the display panel and the conductive member; a light source which emits light toward the light guide; and a light reflector located between the light guide and the conductive member, wherein the display panel comprises: a first substrate located between the backlight unit and the common electrode; and a second substrate opposed to the first substrate and located between the common electrode and the detection electrode.

6 . The sensor-equipped display device of claim 5 , wherein
the common electrode comprises a plurality of divisional electrodes extending in a first direction and arranged at intervals, the conductive member comprises a plurality of divisional portions extending in a second direction crossing the first direction and arranged at intervals, and when the controller extracts the first input pressure data from the common electrode, the controller drives at least one of the divisional portions and extracts the first input pressure data from at least one of the divisional electrodes, or when the controller extracts the second input pressure data from the conductive member, the controller drives at least one of the divisional electrodes and extracts the second input pressure data from at least one of the divisional portions.

7 . The sensor-equipped display device of claim 1 , further comprising a backlight unit which is opposed to the display panel at an interval from the display panel and emits light toward the display panel,
wherein the display panel comprises: a first substrate located between the backlight unit and the common electrode; and a second substrate opposed to the first substrate and located between the common electrode and the detection electrode, and the conductive member is a casing which accommodates the display panel, the detection electrode, the controller and the backlight unit.

8 . The sensor-equipped display device of claim 1 , wherein
at least a part of the intervals is formed of an air layer provided between the display panel and the conductive member.

9 . The sensor-equipped display device of claim 1 , wherein
the controller supplies a common drive signal to the common electrode when the controller drives the common electrode in the display period, and the controller drives the common electrode and extracts the input position data from the detection electrode when the controller extracts the input position data from the detection electrode.

10 . A sensor-equipped display device comprising:
a display panel comprising a common electrode; a detection electrode; a sensor electrode; a conductive member arranged at intervals from the display panel, the detection electrode and the sensor electrode; and a controller, wherein in a display period during which an image is displayed, the controller drives the common electrode, in a first sense period which is different from the display period, the controller drives the common electrode or the detection electrode and extracts input position data from the detection electrode, and in a second sense period which is different from the display period and the first sense period, the controller drives the conductive member and extracts, from the sensor electrode, first input pressure data based on a variation in a distance between the conductive member and the sensor electrode, or the controller drives the sensor electrode and extracts, from the conductive member, second input pressure data based on the variation in the distance, or the controller drives the sensor electrode and extracts, from the sensor electrode, third input pressure data based on the variation in the distance.

11 . The sensor-equipped display device of claim 10 , wherein
when the controller extracts the third input pressure data from the sensor electrode, the controller writes a third write signal to the sensor electrode, produces a third sensor signal between the sensor electrode and the conductive member and reads, from the sensor electrode, a third read signal indicating a variation in the third sensor signal based on the variation in the distance.

12 . The sensor-equipped display device of claim 11 , wherein the conductive member is set at ground potential when the controller extracts the third input pressure data from the sensor electrode.

13 . The sensor-equipped display device of claim 10 , wherein
the display panel comprises: a first substrate located between the sensor electrode and the common electrode; and a second substrate opposed to the first substrate and located between the common electrode and the detection electrode, the sensor electrode is located on a side of the first substrate opposed to the conductive member, and the conductive member is a casing which accommodates the display panel, the detection electrode and the c

Assignees

• Japan Display Inc

Inventors

• Kobayashi Kazuyuki
• Kurasawa Hayato
• Mizuhashi Hiroshi
• Tamaki Masaya
• Koito Takeo
• Noguchi Koji

Classifications

• G06F3/044

  by capacitive means · 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

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title