# US 11,442,545 B2 · Display device having vibration electrodes in vibration area and method of driving the same

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- Number: US 11,442,545 B2
- Document ID: US11442545B2
- Status: Granted
- Kind: B2
- Application number: 16/806,846
- Filed: 2020-03-02
- Published: 2020-12-24
- Granted: 2022-09-13
- Earliest claimed: 2020-03-02
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Jong Tae Kim; Young Sik Kim; Jung Hak Kim
- Web page: https://patentgrep.com/patent/US11442545B2

## CPC

- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 1/1626: {with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]}
- G06F 1/1643: {the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615)}
- G06F 1/189: {Power distribution}
- G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 2203/014: Force feedback applied to GUI
- G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
- G06F 2203/04111: 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
- G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
- H10K 59/40: OLEDs integrated with touch screens
- H10K 59/873: {Encapsulations}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device includes: a display unit including a display area and a non-display area; and a vibration generating unit disposed on the display unit and including a vibration area and a non-vibration area. The vibration generating unit includes first vibration electrodes, second vibration electrodes facing the first vibration electrodes, and vibration layers disposed between the first vibration electrodes and the second vibration electrodes, and the vibration layers are disposed in the vibration area and spaced apart from each other.

## Claims

### Claim 1

A display device comprising:
a display unit including a display area and a non-display area; and
a vibration generating unit disposed on the display unit and including a vibration area and a non-vibration area,
wherein the vibration generating unit comprises first vibration electrodes, second vibration electrodes facing the first vibration electrodes, vibration layers disposed between the first vibration electrodes and the second vibration electrodes, and an insulating layer,
wherein the vibration layers are disposed in the vibration area and spaced apart from each other, and
the insulating layer is disposed between the vibration layers and not disposed between the first vibration electrodes and second vibration electrodes overlapping each other, the insulating layer contacting only a side edge defining the first vibration electrode and an entire height of an edge defining the vibration layer.

### Claim 2 (depends on 1)

The display device of claim 1, wherein
the first vibration electrodes are spaced apart from each other,
the second vibration electrodes are spaced apart from each other, and
the first vibration electrodes and the second vibration electrodes overlap each other with the vibration layers interposed between the first vibration electrodes and the second vibration electrodes.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the vibration generating unit further comprises:
a first connection pattern which connects the first vibration electrodes in a first direction; and
a second connection pattern which connects the second vibration electrodes in a second direction intersecting the first direction.

### Claim 4 (depends on 3)

The display device of claim 3, wherein a width of the first connection pattern in the second direction is smaller than a width of each of the first vibration electrodes in the second direction.

### Claim 5 (depends on 4)

The display device of claim 4, wherein a width of the second connection pattern in the first direction is smaller than a width of each of the second vibration electrodes in the first direction.

### Claim 6 (depends on 5)

The display device of claim 5, wherein the first connection pattern and the second connection pattern overlap the insulating layer in a thickness direction.

### Claim 7 (depends on 6)

The display device of claim 6, further comprising:
first vibration pads and second vibration pads which are disposed in the non-vibration area; and
first vibration lines which are connected to the first vibration electrodes,
wherein
one ends of the vibration lines are respectively connected to the first vibration electrodes disposed in the same row, and
other ends of the vibration lines are respectively connected to the first vibration pads.

### Claim 8 (depends on 7)

The display device of claim 7, further comprising:
second vibration lines which are connected to the second vibration electrodes,
wherein
one ends of the second vibration lines are respectively connected to the second vibration electrodes disposed in the same column, and
the other ends of the second vibration lines are respectively connected to the second vibration pads.

### Claim 9 (depends on 1)

The display device of claim 1, wherein the vibration layers comprise a ferroelectric polymer.

### Claim 10 (depends on 9)

The display device of claim 9, wherein the vibration layers comprise polyvinylidene fluoride.

### Claim 11 (depends on 1)

The display device of claim 1, further comprising:
a touch detection unit disposed on the vibration generating unit.

### Claim 12 (depends on 11)

The display device of claim 11, further comprising:
a vibration driving circuit which applies driving voltages to the first vibration electrodes and the second vibration electrodes; and
a touch driving circuit which detects a touch input and calculates touch coordinates of the touch input,
wherein the touch driving circuit transmits a touch coordinate signal to the vibration driving circuit.

### Claim 13 (depends on 1)

The display device of claim 1, further comprising:
a touch detection unit disposed between the display unit and the vibration generating unit.

### Claim 14

A display device comprising:
a display unit including a display area and a non-display area;
a vibration generating unit disposed on the display unit and including a vibration area and a non-vibration area; and
an insulating layer disposed on the display unit,
wherein the vibration generating unit further includes vibration generating areas disposed in the vibration area and spaced apart from each other, and
each of the vibration generating areas comprises:
a first vibration electrode and a second vibration electrode facing each other; and
a vibration layer disposed between the first vibration electrode and the second vibration electrode, and
the insulating layer which is disposed in a same layer as the vibration layer and surrounds the vibration layer, and not disposed between the first vibration electrode and second vibration electrode overlapping each other, the insulating layer contacting only a side edge defining the first vibration electrode and an entire height of an edge defining the vibration layer.

### Claim 15 (depends on 14)

The display device of claim 14, wherein the vibration layer comprises polyvinylidene fluoride and is provided in plural in a form of islands in the vibration area.

### Claim 16 (depends on 15)

The display device of claim 15, further comprising:
a touch detection unit which is disposed on the vibration generating unit and comprises a plurality of touch electrodes,
wherein each of the vibration generating areas correspond to each of the touch electrodes.

### Claim 17

A method of driving a display device comprising a display unit, a vibration generating unit disposed on the display unit and including vibration generating areas spaced apart from each other, and a touch detection unit disposed directly on the vibration generating unit, the method comprising:
sensing a touch on the display device by using the touch detection unit; and
providing a haptic feedback based on coordinates of the touch by using the vibration generating unit,
wherein the providing the haptic feedback comprises generating vibrations by applying a driving voltage to a vibration generating area corresponding to the coordinates of the touch by using the vibration generating unit disposed between the touch detection unit and the display unit,
wherein the vibration generating unit comprises first vibration electrodes, second vibration electrodes facing the first vibration electrodes, vibration layers disposed between the first vibration electrodes and the second vibration electrodes, and an insulating layer,
wherein the vibration layers are disposed in the vibration area and spaced apart from each other, and
the insulating layer is disposed between the vibration layers and not disposed between the first vibration electrodes and second vibration electrodes overlapping each other, the insulating layer contacting only a side edge defining the first vibration electrode and an entire height of an edge defining the vibration layer.

### Claim 18 (depends on 17)

The method of claim 17, wherein
the display device further comprises a vibration driving circuit which applies the driving voltage and a touch driving circuit which senses the touch,
wherein the method further comprises transmitting a touch coordinate signal generated based on the coordinates of the touch from the touch driving circuit to the vibration driving circuit.