# US 12,001,245 B2 · Electronic products

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- Number: US 12,001,245 B2
- Document ID: US12001245B2
- Status: Granted
- Kind: B2
- Application number: 17/645,303
- Filed: 2021-12-20
- Published: 2022-09-15
- Granted: 2024-06-04
- Earliest claimed: 2021-03-15
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hirotsugu Kishimoto; Da Som Gu; Sung Guk An; Jeong Il Yoo; Jang Doo Lee; Yong Chan Jeon
- Web page: https://patentgrep.com/patent/US12001245B2

## CPC

- 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 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/03: with respect to the orientation of features (direction of fibres or filaments B32B5/12)
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/281: {comprising polyimides}
- B32B 27/36: comprising polyesters
- G06F 1/1616: {with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position}
- G06F 3/03545: {Pens or stylus}
- G06F 3/038: Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/046: by electromagnetic means
- B32B 2255/205: Metallic coating
- B32B 2255/26: Polymeric coating
- B32B 2307/202: Conductive
- B32B 2307/206: Insulating
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7246: Water vapor barrier
- B32B 2307/732: Dimensional properties
- B32B 2457/208: Touch screens
- G06F 2203/0384: Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices
- G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

An electronic product comprises: a sensing area that senses a touch, a non-sensing area adjacent to the sensing area and that does not sense a touch, a display panel that displays an image on a front surface, and a stack structure disposed on a rear surface of the display panel and that includes a plurality of conductive patterns that sense a touch. The plurality of conductive patterns includes first conductive patterns that extend across the sensing area and the non-sensing area. Each of the first conductive patterns has a first thickness in the sensing area and a second thickness in the non-sensing area that is less than the first thickness.

## Claims

### Claim 1

An electronic product, comprising:
a sensing area that senses a touch;
a non-sensing area adjacent to the sensing area and that does not sense a touch;
a display panel that displays an image on a front surface; and
a stack structure on a rear suffice of the display panel and that includes a plurality of conductive patterns that sense a touch,
wherein the plurality of conductive patterns includes first conductive patterns that extend in a first direction across the sensing area and the non-sensing area, and
wherein each of the first conductive patterns has a first thickness in the sensing area and a second thickness in the non-sensing area that is less than the first thickness.

### Claim 2 (depends on 1)

The electronic product of claim 1, wherein the first thickness is at least twice the second thickness.

### Claim 3 (depends on 1)

The electronic product of claim 1, wherein the stack structure further comprises a digitizer layer that senses a touch from an electronic pen, and
wherein the digitizer layer comprises:
second conductive patterns that extend in a second direction that intersects the first direction, wherein the second conductive patterns are disposed in the sensing area; and
an insulating layer interposed between the first conductive patterns and the second conductive patterns and that includes an insulating material.

### Claim 4 (depends on 3)

The electronic product of claim 3, wherein each of the first conductive patterns comprises:
a first sub-region in the on-sensing area that has the uniform second thickness; and
a second sub-region in the non-sensing area and that has a thickness that continuously increases from the second thickness to the first thickness.

### Claim 5 (depends on 3)

The electronic product of claim 3, wherein the second conductive patterns have a third thickness greater than the first thickness.

### Claim 6

An electronic product, comprising:
a display panel;
a first stress area and a second stress area; and
a stack structure disposed on the display panel and that includes a plurality of conductive patterns,
wherein the plurality of conductive patterns includes a first conductive pattern that extends across the first stress area and the second stress area,
wherein the first conductive pattern has a first thickness in the first stress area and a second thickness in the second stress area that is less than the first thickness, and
wherein the first stress area is subjected to less stress than the second stress area.

### Claim 7 (depends on 6)

The electronic product of claim 6, wherein the second stress area is a foldable area that is bendable or foldable, and the first stress area is a non foldable area that is neither bent nor folded.

### Claim 8 (depends on 7)

The electronic product of claim 7, wherein the first conductive pattern has a cross-sectional shape in which a front surface thereof is depressed inwards in the foldable area.

### Claim 9 (depends on 7)

The electronic product of claim 7, wherein the display panel displays images on a front side,
wherein the display panel and the stack structure are configured to be folded toward the front side,
wherein the display panel includes a neutral plane that does not increase or decrease in length when the foldable area is folded, and
wherein the first conductive pattern has a cross-sectional shape in which a rear surface thereof is depressed inwards in the foldable area.

### Claim 10 (depends on 7)

The electronic product of claim 7, wherein the first thickness is at least twice the second thickness.

### Claim 11 (depends on 7)

The electronic product of claim 7, wherein the first conductive pattern comprises:
a first sub-region in the foldable area that has the second thickness; and
a second sub-region that has a thickness in the foldable area that continuously increases from the second thickness to the first thickness.

### Claim 12 (depends on 11)

The electronic product of claim 11, wherein a width of the second sub-region is not greater than one-third a width of the first sub-region.

### Claim 13 (depends on 7)

The electronic product of claim 7, wherein the stack structure comprises a digitizer layer on a rear surface of the display panel, and
wherein the first conductive pattern senses an external magnetic field or external electromagnetic signal.

### Claim 14 (depends on 13)

The electronic product of claim 13, wherein the digitizer layer comprises:
a base layer that includes an insulating material and that is disposed on a rear surface of the first conductive pattern; and
a second conductive pattern disposed on a rear surface of the base layer and that extends and intersects the first conductive pattern when viewed from above.

### Claim 15 (depends on 14)

The electronic product of claim 14, wherein the second conductive patterns are disposed in the non-foldable area.

### Claim 16 (depends on 14)

The electronic product of claim 14, wherein each of the first conductive pattern and the second conductive pattern has a closed loop shape when viewed from above,
wherein a length of the closed loop of the second conductive pattern is greater than the length of the closed loop of the first conductive pattern, and
wherein the second conductive pattern has a third thickness that is greater than the first thickness.

### Claim 17 (depends on 16)

The electronic product of claim 16, wherein the first thickness ranges from 4.0 to 8 μm, the second thickness is equal to or greater than 1.0 μm and less than 2.5 μm, and the third thickness ranges from 8.0 to 13.0 μm.

### Claim 18 (depends on 13)

The electronic product of claim 13, wherein the digitizer layer comprises:
a base layer that includes an insulating material;
a second conductive pattern that extends and intersects the first conductive pattern when viewed from above;
a first adhesive layer that includes an insulating photopolymer resin and that is disposed on the first conductive pattern; and
a second adhesive layer that includes an insulating photopolymer resin and that is disposed on the second conductive pattern,
wherein the base layer is disposed on either a front surface of the first conductive pattern or a rear surface of the second conductive pattern.

### Claim 19 (depends on 18)

The electronic product of claim 18,
wherein the first conductive pattern has a cross-sectional shape with a rear surface thereof that is depressed inwards towards the base layer,
wherein the base layer is disposed on the front surface of the first conductive pattern,
wherein the first adhesive layer is disposed between the first conductive pattern and the second conductive pattern, and
wherein the second conductive pattern and the second adhesive layer are disposed in the non-foldable area.

### Claim 20 (depends on 18)

The electronic product of claim 18,
wherein the base layer is disposed on a rear surface of the second conductive patterns, and
wherein the second adhesive layer is disposed between the second conductive patterns and the first conductive patterns.

### Claim 21

An electronic product, comprising:
a display panel that includes front surface that displays an image and a rear surface opposite to the front surface, and a foldable area and a non-foldable area; and
a digitizer layer disposed on the rear surface of the display panel, wherein the digitizer layer comprises:
a base layer that includes an insulating material, and
a first conductive pattern and a second conductive pattern that are disposed on the base layer,
wherein the first conductive pattern extends across the foldable area and the non-foldable area in a first direction,
wherein the second conductive pattern is disposed in the non-foldable area and extends across the first conductive pattern in a second direction that crosses the first direction, when viewed from above,
wherein the first conductive pattern has a first thickness in the foldable area and a second thickness in the non-foldable area that is less than the first thickness,
wherein the second conductive pattern has a third thickness that is greater than the first thickness, and
wherein the first conductive pattern senses an external magnetic field or external electromagnetic signal.