# US 11,308,833 B2 · Information terminal

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- Number: US 11,308,833 B2
- Document ID: US11308833B2
- Status: Granted
- Kind: B2
- Application number: 17/014,638
- Filed: 2020-09-08
- Published: 2020-12-24
- Granted: 2022-04-19
- Earliest claimed: 2016-06-30
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Yuki Okamoto
- Web page: https://patentgrep.com/patent/US11308833B2

## CPC

- G09G 3/035: {for flexible display surfaces}
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)}
- G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)}
- H10D 30/6756: {Amorphous oxide semiconductors}
- H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO}
- H10D 86/60: wherein the TFTs are in active matrices
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G09G 2300/023: Display panel composed of stacked panels
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2330/021: Power management, e.g. power saving
- G09G 2354/00: Aspects of interface with display user
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An information terminal capable of switching display and non-display of images by strain. The information terminal includes a display portion and a strain sensor. The display portion includes a liquid crystal element, a light-emitting element, and a first and a second transistors. The strain sensor includes a strain sensor element and a resistor. The first transistor has a function of controlling current flowing into the light-emitting element. The strain sensor element has a function as a variable resistor. A first terminal of the strain sensor element is electrically connected to a first terminal of the resistor. A gate of the first transistor is electrically connected to a first terminal of the strain sensor element via the second transistor.

## Claims

### Claim 1

A display panel comprising:
a first display element;
a second display element; and
a strain sensor; and
wherein the display panel is configured so that light emitted by the second display element is sighted by a user of the display panel when the strain sensor does not sense strain whereas light emitted by the first display element is sighted by the user of the display panel when the strain sensor senses strain.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein the strain sensor comprises a metal thin film resistor.

### Claim 3 (depends on 1)

The display panel according to claim 1, wherein the strain sensor comprises a piezoelectric element.

### Claim 4 (depends on 1)

The display panel according to claim 1, wherein the display panel is bendable.

### Claim 5 (depends on 4)

The display panel according to claim 4, wherein the display panel is bendable in a first direction and in a second direction different from the first direction.

### Claim 6 (depends on 1)

The display panel according to claim 1, further comprising a plurality of display pixels and a plurality of sensing pixels,
wherein each of the plurality of the display pixels comprises a corresponding first display element and a corresponding second display element,
wherein each of the plurality of the sensing pixels comprises a corresponding strain sensor,
wherein the plurality of the display pixels is arranged in a first matrix, and
wherein the plurality of the sensing pixels is arranged in a second matrix.

### Claim 7 (depends on 1)

The display panel according to claim 1, further comprising a plurality of display pixels and a plurality of sensing pixels,
wherein each of the plurality of the display pixels comprises a corresponding display element,
wherein each of the plurality of the sensing pixels comprises a corresponding strain sensor,
wherein the plurality of the display pixels is arranged in a first matrix, and
wherein the plurality of the sensing pixels is arranged in a second matrix.

### Claim 8

A display panel comprising:
a display element; and
a strain sensor;
wherein the display panel is configured so that light is emitted by the display element when the strain sensor does not sense strain whereas light is not emitted by the display element when the strain sensor senses strain.

### Claim 9 (depends on 8)

The display panel according to claim 8, wherein the strain sensor comprises a metal thin film resistor.

### Claim 10 (depends on 8)

The display panel according to claim 8, wherein the strain sensor comprises a piezoelectric element.

### Claim 11 (depends on 8)

The display panel according to claim 8, wherein the display panel is bendable.

### Claim 12 (depends on 11)

The display panel according to claim 11, wherein the display panel is bendable in a first direction and in a second direction different from the first direction.