# US 12,603,025 B2 · Display apparatus, control method, display device and computer storage medium

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- Number: US 12,603,025 B2
- Document ID: US12603025B2
- Status: Granted
- Kind: B2
- Application number: 18/696,967
- Filed: 2023-07-28
- Published: 2024-12-05
- Granted: 2026-04-14
- Earliest claimed: 2022-08-24
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: BOE Technology Group Co., Ltd.
- Inventors: Ke Feng
- Web page: https://patentgrep.com/patent/US12603025B2

## CPC

- G09G 3/035: {for flexible display surfaces}
- G09F 9/30: in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00)
- G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED}
- 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)
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS

## Abstract

The present disclosure provides a display apparatus. The display apparatus includes a reel, a flexible display panel, a detection assembly, and a plurality of flex sensors. The plurality of flex sensors are disposed on the flexible display panel and arranged along a winding direction of the flexible display panel. The flex sensors are configured to detect a change in a bending degree of the flexible display panel and output corresponding voltages according to the bending degree.

## Claims

### Claim 1

A display apparatus, comprising: a reel, a flexible display panel, a detection assembly, a control assembly, and a plurality of flex sensors; wherein
at least part of the flexible display panel is wound on the reel;
the plurality of flex sensors are connected in series and disposed on the flexible display panel, the plurality of flex sensors are arranged along a winding direction of the flexible display panel, and a resistance value of at least one flex sensor of the plurality flex sensors is positively correlated with a bending degree of the at least one flex sensor; and
the detection assembly is electrically connected to the plurality of flex sensors respectively to detect voltages of the flex sensors;
the control assembly is configured to perform:
acquiring voltages of the plurality of flex sensors connected in series in the display apparatus, wherein the plurality of flex sensors have, along a direction away from the reel, a plurality of arrangement serial numbers from small to large in a state where a flexible display panel is contracted;
comparing the voltages of the plurality of flex sensors;
acquiring an amount of voltage change and an arrangement serial number of a target flex sensor in response to a change in a voltage of at least one flex sensor of the plurality of flex sensors, the target flex sensor being a flex sensor with a largest arrangement serial number among the at least one flex sensor; and
determining a sliding distance of the flexible display panel based on the amount of voltage change and the arrangement serial number, the sliding distance being a distance by which a reel drives the flexible display panel to move;
wherein determining the sliding distance of the flexible display panel based on the amount of voltage change and the arrangement serial number comprises:
acquiring a bending angle of the target flex sensor based on the amount of voltage change and a correspondence between the amount of voltage change and a bending angle of at least one of the plurality of flex sensors;
acquiring a bending distance of the target flex sensor based on the bending angle; and
determining the sliding distance based on a second formula:
D=(m−1)×L1+L0;
wherein D represents the sliding distance, m represents an arrangement serial number of a target flex sensor, L1 represents a length of the flex sensor in an arrangement direction of the plurality of flex sensors, and L0 represents the bending distance of the target flex sensor;
wherein the length of the flex sensor in the arrangement direction of the plurality of flex sensors is one-half of a circumference of the reel; and
acquiring the bending distance of the target flex sensor based on the bending angle comprises:
determining the bending distance based on a third formula:
L0=(αm/180°)×L1;
wherein αm represents the bending angle of the target flex sensor.

### Claim 2 (depends on 1)

The display apparatus according to claim 1, further comprising: a fixed housing, a telescopic structure, a support member, and a tension member; wherein one end of the telescopic structure is fixedly connected to the fixed housing, another end of the telescopic structure is fixedly connected to the support member, and the support member is movably connected to the reel; and
the flexible display panel comprises a flat display portion and a slidable and rollable display portion that are connected to each other, wherein one edge of the flat display portion is fixedly connected to one edge of the slidable and rollable display portion, the flat display portion is fixedly connected to the fixed housing, the slidable and rollable display portion is at least partially wound on the reel, another edge of the slidable and rollable display portion is fixedly connected to one end of the tension member, and another end of the tension member is fixedly connected to the fixed housing.

### Claim 3 (depends on 2)

The display apparatus according to claim 2, wherein the plurality of flex sensors are disposed in the slidable and rollable display portion, and a number of the flex sensors and a first width of the slidable and rollable display portion satisfy a first formula:
n
=
S
/
L
1
;
wherein n represents the number of the flex sensors, S represents the first width of the slidable and rollable display portion, the first width is a width of the slidable and rollable display portion in a direction perpendicular to a length direction of the reel in a state where the flexible display panel is contracted, and L1 represents a length of the flex sensor in an arrangement direction of the plurality of flex sensors.

### Claim 4 (depends on 1)

The display apparatus according to claim 1, wherein the plurality of flex sensors have a same structure, shape, and size.

### Claim 5 (depends on 1)

The display apparatus according to claim 1, wherein the flex sensor comprises a metal pattern, and the flex sensor is in a shape of a strip or a winding line.

### Claim 6 (depends on 5)

The display apparatus according to claim 5, wherein the flexible display panel comprises a gate line and a data line;
wherein the flex sensor is disposed in a same layer as the gate line, or the flex sensor is disposed in a same layer as the data line.

### Claim 7 (depends on 1)

The display apparatus according to claim 1, further comprising: a drive assembly; wherein
the control assembly is electrically connected to the detection assembly and the drive assembly respectively, and the drive assembly is configured to drive the reel to rotate; and
the control assembly is configured to receive voltages of the plurality of flex sensors acquired by the detection assembly and control rotation or stopping of the reel by determining a sliding distance of the flexible display panel based on the voltages, the sliding distance being a distance by which the reel drives the flexible display panel to move.

### Claim 8

A method for controlling a display apparatus, comprising:
acquiring voltages of a plurality of flex sensors connected in series in the display apparatus, wherein the plurality of flex sensors have, along a direction away from a reel, a plurality of arrangement serial numbers from small to large in a state where a flexible display panel is contracted;
comparing the voltages of the plurality of flex sensors;
acquiring an amount of voltage change and an arrangement serial number of a target flex sensor in response to a change in a voltage of at least one flex sensor of the plurality of flex sensors, the target flex sensor being a flex sensor with a largest arrangement serial number among the at least one flex sensor; and
determining a sliding distance of the flexible display panel based on the amount of voltage change and the arrangement serial number, the sliding distance being a distance by which a reel drives the flexible display panel to move;
wherein determining the sliding distance of the flexible display panel based on the amount of voltage change and the arrangement serial number comprises:
acquiring a bending angle of the target flex sensor based on the amount of voltage change and a correspondence between the amount of voltage change and a bending angle of the flex sensor;
acquiring a bending distance of the target flex sensor based on the bending angle; and
determining the sliding distance based on a second formula:
D=(m−1)×L1+L0;
wherein D represents the sliding distance, m represents an arrangement serial number of a target flex sensor, L1 represents a length of the flex sensor in an arrangement direction of the plurality of flex sensors, and L0 represents the bending distance of the target flex sensor;
wherein the length of the flex sensor in the arrangement direction of the plurality of flex sensors is one-half of a circumference of the reel; and
acquiring the bending distance of the target flex sensor based on the bending angle comprises:
determining the bending distance based on a third formula:
L0=)(αm/180°×L1;
wherein αm represents the bending angle of the target flex sensor.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the voltages of the plurality of flex sensors are acquired in real-time or according to a predetermined frequency.

### Claim 10 (depends on 9)

The method according to claim 9, wherein the predetermined frequency is greater than a refresh frequency of the flexible display panel.

### Claim 11 (depends on 8)

A non-transitory computer storage medium, storing at least one instruction, at least one program, a code set, or an instruction set; wherein the at least one instruction, the at least one program, the code set, or the instruction set, when loaded and executed by a processor, causes the processor to perform the method for controlling a display apparatus as defined in claim 8.

### Claim 12

A display device, comprising: a display apparatus, a processor, and a memory; wherein
the memory stores at least one instruction, at least one program, a code set, or an instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set, when loaded and executed by the processor, causes the processor to perform:
acquiring voltages of a plurality of flex sensors connected in series in the display apparatus, wherein the plurality of flex sensors have, along a direction away from a reel, a plurality of arrangement serial numbers from small to large in a state where a flexible display panel is contracted;
comparing the voltages of the plurality of flex sensors;
acquiring an amount of voltage change and an arrangement serial number of a target flex sensor in response to a change in a voltage of at least one flex sensor of the plurality of flex sensors, the target flex sensor being a flex sensor with a largest arrangement serial number among the at least one flex sensor; and
determining a sliding distance of the flexible display panel based on the amount of voltage change and the arrangement serial number, the sliding distance being a distance by which a reel drives the flexible display panel to move;
wherein determining the sliding distance of the flexible display panel based on the amount of voltage change and the arrangement serial number comprises:
acquiring a bending angle of the target flex sensor based on the amount of voltage change and a correspondence between the amount of voltage change and a bending angle of the flex sensor;
acquiring a bending distance of the target flex sensor based on the bending angle; and
determining the sliding distance based on a second formula:
D=(m−1)×L1+L0;
wherein D represents the sliding distance, m represents an arrangement serial number of a target flex sensor, L1 represents a length of the flex sensor in an arrangement direction of the plurality of flex sensors, and L0 represents the bending distance of the target flex sensor;
wherein the length of the flex sensor in the arrangement direction of the plurality of flex sensors is one-half of a circumference of the reel; and
acquiring the bending distance of the target flex sensor based on the bending angle comprises:
determining the bending distance based on a third formula:
L0=(αm/180°×L1;
wherein αm represents the bending angle of the target flex sensor.

### Claim 13 (depends on 12)

The display device according to claim 12, wherein the voltages of the plurality of flex sensors are acquired in real-time or according to a predetermined frequency.

### Claim 14 (depends on 13)

The display device according to claim 13, wherein the predetermined frequency is greater than a refresh frequency of the flexible display panel.