# US 11,112,947 B2 · Display device and operation method thereof

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- Number: US 11,112,947 B2
- Document ID: US11112947B2
- Status: Granted
- Kind: B2
- Application number: 16/856,093
- Filed: 2020-04-23
- Published: 2020-08-06
- Granted: 2021-09-07
- Earliest claimed: 2014-05-02
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Norifumi Takesue
- Web page: https://patentgrep.com/patent/US11112947B2

## CPC

- G06F 3/0483: Interaction with page-structured environments, e.g. book metaphor
- 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 1/165: {the additional display being small, e.g. for presenting status information}
- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- G06F 1/169: {the I/O peripheral being an integrated pointing device, e.g. trackball in the palm rest area, mini-joystick integrated between keyboard keys, touch pads or touch stripes (G06F1/1643 takes precedence; constructional details of pointing devices G06F3/033)}
- G06F 3/03: Arrangements for converting the position or the displacement of a member into a coded form
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 3/0447: {Position sensing using the local deformation of sensor cells}
- G06F 3/0487: using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- 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
- Y02E 10/549: Organic PV cells
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

To provide a display device having an input means using a bending action. A display device includes a first substrate, a second substrate, a display part, a first sensor element, and a second sensor element. The display part is provided between the first substrate and the second substrate. The first sensor element and the second sensor element are provided in their respective regions overlapping with the display part between the first substrate and the second substrate. The region where the second sensor element is provided overlaps with the region where the first sensor element is provided. The first substrate and the second substrate have flexibility. The first sensor element has a function of detecting the presence or absence of an object touching the first substrate or the second substrate. The second sensor element has a function of detecting the distortion of the first substrate or the second substrate.

## Claims

### Claim 1

A method for operating a display device, comprising the steps of:
displaying a first image on a display part;
first determining whether a curvature of an edge or a vicinity of a center region of the display part is larger than or equal to a first set value, wherein, when the curvature is smaller than the first set value, the step of first determining of the curvature is performed again;
displaying an image for operation on the edge of the display part when the curvature is larger than or equal to the first set value;
first detecting, on the image for operation, a position of an object touching the image;
second detecting, on the image for operation, a change in the position of the object;
second determining whether a curvature of the edge of the display part is larger than or equal to a second set value when the change in the position of the object is not detected in the step of second detecting, wherein when the curvature is smaller than the second set value, the step of second detecting is performed again; and
changing the first image to a second image when the change in the position of the object is detected in the step of second detecting, wherein, when the curvature is larger than or equal to the second set value in the step of second determining, the step of changing is performed.

### Claim 2 (depends on 1)

The method for operation a display device, according to claim 1, wherein the steps from displaying to changing are performed sequentially and repeatedly while the second image displayed on the display part in the step of changing is used as the first image displayed on the display part in the step of displaying.