# US 10,770,010 B2 · Information terminal

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- Number: US 10,770,010 B2
- Document ID: US10770010B2
- Status: Granted
- Kind: B2
- Application number: 16/515,215
- Filed: 2019-07-18
- Published: 2019-11-07
- Granted: 2020-09-08
- 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/US10770010B2

## 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

An information terminal comprising:
a touch sensor; and
a display panel capable of display information input via the touch sensor, the display panel comprising:
a first display element;
a second display element; and
a strain sensor; and
wherein the information terminal is configured so that light emitted by the second display element is sighted by a user of the information terminal when the strain sensor does not sense strain whereas light reflected by the first display element is sighted by the user of the information terminal when the strain sensor senses strain.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

The information terminal according to claim 1, wherein the strain sensor comprises a piezoelectric element.

### Claim 4 (depends on 1)

The information terminal according to claim 1, comprising:
a display portion comprising:
the first display element;
the second display element;
a first transistor; and
a second transistor; and
the strain sensor comprising:
a strain sensor element; and
a resistor comprising a first terminal electrically connected to a first terminal of the strain sensor element and electrically connected to a gate of the first transistor via the second transistor;
wherein:
the first transistor is configured to control current flowing into the second display element; and
the strain sensor element is configured to be as a variable resistor.

### Claim 5 (depends on 4)

The information terminal according to claim 4, wherein the first transistor and the second transistor each comprise a channel formation region including an oxide semiconductor.

### Claim 6 (depends on 4)

The information terminal according to claim 4, wherein the strain sensor element is a metal thin film resistor.

### Claim 7 (depends on 4)

The information terminal according to claim 4, wherein the strain sensor element is a piezoelectric element.

### Claim 8

An information terminal comprising:
a touch sensor; and
a display panel capable of display information input via the touch sensor, the display panel comprising:
a first display element;
a second display element; and
a strain sensor,
wherein the information terminal s configured so that light reflected by the first display element is sighted by a user of the information terminal when the strain sensor does not sense strain whereas light emitted by the second display element is sighted by the user of the information terminal when the strain sensor senses strain.

### Claim 9 (depends on 8)

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

### Claim 10 (depends on 8)

The information terminal according to claim 8, wherein the strain sensor comprises a piezoelectric element.

### Claim 11 (depends on 8)

The information terminal according to claim 8, comprising:
a display portion comprising:
the first display element;
the second display element;
a first transistor; and
a second transistor; and
the strain sensor comprising:
a strain sensor element; and
a resistor comprising a first terminal electrically connected to a first terminal of the strain sensor element and electrically connected to a gate of the first transistor via the second transistor,
wherein:
the first transistor is configured to control current flowing into the second display element; and
the strain sensor element is configured to be as a variable resistor.

### Claim 12 (depends on 11)

The information terminal according to claim 11, wherein the first transistor and the second transistor each comprise a channel formation region including an oxide semiconductor.

### Claim 13 (depends on 11)

The information terminal according to claim 11, wherein the strain sensor element is a metal thin film resistor.

### Claim 14 (depends on 11)

The information terminal according to claim 11, wherein the strain sensor element is a piezoelectric element.

### Claim 15

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 reflected by the first display element is sighted by the user of the display panel when the strain sensor senses strain.

### Claim 16 (depends on 15)

The display panel according to claim 15, wherein the strain sensor comprises a metal thin film resistor.

### Claim 17 (depends on 15)

The display panel according to claim 15, wherein the strain sensor comprises a piezoelectric element.

### Claim 18 (depends on 15)

The display panel according to claim 15, comprising:
a display portion comprising:
the first display element;
the second display element;
a first transistor; and
a second transistor; and
the strain sensor comprising:
a strain sensor element; and
a resistor comprising a first terminal electrically connected to a first terminal of the strain sensor element and electrically connected to a gate of the first transistor via the second transistor,
wherein:
the first transistor is configured to control current flowing into the second display element; and
the strain sensor element is configured to be as a variable resistor.

### Claim 19 (depends on 18)

The display panel according to claim 18, wherein the first transistor and the second transistor each comprise a channel formation region including an oxide semiconductor.

### Claim 20 (depends on 18)

The display panel according to claim 18, wherein the strain sensor element is a metal thin film resistor.

### Claim 21 (depends on 18)

The display panel according to claim 18, wherein the strain sensor element is a piezoelectric element.

### Claim 22

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

### Claim 23 (depends on 22)

The display panel according to claim 22, wherein the strain sensor comprises a metal thin film resistor.

### Claim 24 (depends on 22)

The display panel according to claim 22, wherein the strain sensor comprises a piezoelectric element.

### Claim 25 (depends on 22)

The display panel according to claim 22, comprising:
a display portion comprising:
the first display element;
the second display element;
a first transistor; and
a second transistor; and
the strain sensor comprising:
a strain sensor element; and
a resistor comprising a first terminal electrically connected to a first terminal of the strain sensor element and electrically connected to a gate of the first transistor via the second transistor,
wherein:
the first transistor is configured to control current flowing into the second display element; and
the strain sensor element is configured to be as a variable resistor.

### Claim 26 (depends on 25)

The display panel according to claim 25, wherein the first transistor and the second transistor each comprise a channel formation region including an oxide semiconductor.

### Claim 27 (depends on 25)

The display panel according to claim 25, wherein the strain sensor element is a metal thin film resistor.

### Claim 28 (depends on 25)

The display panel according to claim 25, wherein the strain sensor element is a piezoelectric element.