CN113539098A

CN113539098A - Flexible display device and control method thereof

Info

Publication number: CN113539098A
Application number: CN202110805808.7A
Authority: CN
Inventors: 吴露; 王宗元; 朱红
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-10-22
Anticipated expiration: 2041-07-16
Also published as: CN113539098B

Abstract

The embodiment of the application provides a flexible display device and a control method thereof, relates to the technical field of display, and is used for detecting the display area of the flexible display device. A flexible display device includes a flexible display panel, a housing assembly, and a position detection assembly. The shell assembly comprises a sliding part and a fixed part, and the sliding part and the fixed part are arranged correspondingly; in the first direction, the first distance between the first surface of the sliding part facing the fixed part and the second surface of the fixed part facing the sliding part is not completely equal; the sliding part is used for driving the flexible display panel to roll smoothly; the position detection assembly is used for detecting a first distance in the process that the sliding piece drives the flexible display panel to slide and roll; wherein, the first direction is the moving direction of the sliding piece.

Description

Flexible display device and control method thereof

Technical Field

The invention relates to the technical field of display, in particular to a flexible display device and a control method thereof.

Background

The flexible display panel can be freely bent, so that the display device with the flexible display panel can realize more diversified structural forms, such as a folding form, a bending form, a sliding and rolling form and the like. For example, the display device in the sliding and rolling form can be unfolded or rolled to one side in a sliding mode, so that the size of the product screen can be flexibly adjusted, the product screen is free of folds, and better use experience is brought to a user. Under different use scenes, a user can control the display device to display different display areas according to the requirements. Therefore, how to safely and effectively detect and control the display area of the display device according to the needs of the user becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The embodiment of the invention provides a flexible display device and a control method thereof, which are used for safely and effectively detecting and controlling the display area of the flexible display device.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in one aspect, there is provided a flexible display device including: a flexible display panel; the shell assembly comprises a sliding part and a fixed part, and the sliding part and the fixed part are correspondingly arranged; in a first direction, a first distance between a first surface of the sliding part facing the fixed part and a second surface of the fixed part facing the sliding part is not equal to each other; the sliding part is used for driving the flexible display panel to slide and roll; the position detection assembly is used for detecting the first distance in the process that the sliding piece drives the flexible display panel to slide and roll; wherein the first direction is a direction in which the slider moves.

Optionally, the position detecting assembly is fixedly connected with the sliding member; a second distance between the second surface and the position detection assembly along the first direction is not exactly equal; wherein, in the moving process of the sliding part, the orthographic projection of the position detection assembly on the fixed part is positioned in the fixed part.

Optionally, the second surface has at least one first protrusion facing the first surface.

Optionally, the second surface has a plurality of first protrusions; the plurality of first protrusions at least comprises two first protrusions positioned at two ends of the fixing piece.

Optionally, the second surface is a bevel.

Optionally, the position detection assembly is disposed on the first surface.

Optionally, the position detecting assembly is disposed on a third surface of the slider intersecting the first surface.

Optionally, the housing assembly further includes a bearing member, and the bearing member is fixedly connected to the sliding member and the position detecting assembly, respectively.

Optionally, the position detection assembly is fixedly connected with the fixing member; a third distance between the first surface and the position detection assembly along the first direction is not exactly equal; wherein, during the movement of the sliding part, the orthographic projection of the position detection assembly on the sliding part is positioned in the sliding part.

Optionally, the first surface has a plurality of second protrusions; the plurality of second protrusions includes at least two second protrusions located at both ends of the slider.

Optionally, the first surface is a bevel.

Optionally, the housing assembly further comprises a housing, the housing comprising a first portion and a second portion, the first portion and the second portion being spliced; the first portion is connected with the sliding member, and the second portion is connected with the fixed member.

Optionally, the flexible display device further includes a printed circuit board electrically connected to the sliding member and the position detection assembly.

In another aspect, a method for controlling a flexible display device is provided, including: the position detection assembly detects a first distance between a first surface of the sliding part and a second surface of the fixed part and outputs a first signal; the processor judges whether the sliding piece is at the starting position and/or the limiting position or not according to the first signal, and outputs a control signal under the condition that the sliding piece is at the starting position or the limiting position; and the printed circuit board controls the sliding piece to stop moving according to the control signal.

Optionally, the position detecting assembly detects a first distance between the first surface of the sliding member and the second surface of the fixed member, and outputs a first signal, and includes: detecting the first distance between the first surface of the sliding member and the second surface of the fixed member with a photosensor, and outputting a current signal as the first signal.

Optionally, the position detecting assembly detects a first distance between the first surface of the sliding member and the second surface of the fixed member, and outputs a first signal, and includes: detecting the first distance between the first surface of the slider and the second surface of the fixed member with an ultrasonic displacement sensor, and outputting the first distance as the first signal.

Optionally, the method for controlling a flexible display device further includes: the processor is used for judging the position of the sliding part according to the first signal.

The invention provides a flexible display device and a control method thereof. When the sliding part reaches the initial position or the limit position, the processor outputs a control signal, so that the printed circuit board can control the sliding part to stop moving in time according to the control signal, the motor driving the sliding part to move is prevented from being locked and even damaging the flexible display device, and the service life of the flexible display device is prolonged. On the other hand, in the process that the sliding part moves along the first direction, the flexible display panel can be driven to slide and roll, so that the flexible display device can display different display areas. The display area displayed by the flexible display device can be detected in real time according to the position of the sliding part, so that the required display area can be flexibly set.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1A is a top view of a flexible display device according to an embodiment of the present application;

fig. 1B is a top view of another flexible display device provided in the embodiments of the present application;

fig. 2A is a cross-sectional view of a flexible display device according to an embodiment of the present application;

fig. 2B is a cross-sectional view of another flexible display device provided in the embodiments of the present application;

fig. 2C is a cross-sectional view of another flexible display device provided in the embodiments of the present application;

fig. 2D is a cross-sectional view of another flexible display device provided in the embodiments of the present application;

fig. 2E is a cross-sectional view of another flexible display device provided in the embodiments of the present application;

fig. 3 is a schematic diagram illustrating a control method of a flexible display device according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram illustrating a process of outputting a first signal in a control method of a flexible display device according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a current signal as a first signal according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram illustrating a process of outputting a first signal in a control method of a flexible display device according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a first distance as a first signal according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of another control method for a flexible display device according to an embodiment of the present disclosure;

fig. 9A is a cross-sectional view of another flexible display device provided in an embodiment of the present application;

fig. 9B is a cross-sectional view of another flexible display device provided in an embodiment of the present application;

fig. 9C is a cross-sectional view of another flexible display device provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of another current signal provided by an embodiment of the present application as a first signal;

fig. 11 is a cross-sectional view of still another flexible display device provided in an embodiment of the present application;

fig. 12A is a cross-sectional view of still another flexible display device provided in an embodiment of the present application;

fig. 12B is a cross-sectional view of another flexible display device provided in an embodiment of the present application;

fig. 12C is a cross-sectional view of another flexible display device provided in an embodiment of the present application;

FIG. 13 is a schematic diagram of another current signal as a first signal according to an embodiment of the present disclosure;

fig. 14 is a schematic diagram of obtaining a real-time position of a sliding member according to an embodiment of the present application;

fig. 15A is a cross-sectional view of still another flexible display device provided in an embodiment of the present application;

fig. 15B is a cross-sectional view of another flexible display device provided in an embodiment of the present application;

fig. 16 is a cross-sectional view of another flexible display device provided in an embodiment of the present application.

Reference numerals:

100-a flexible display device; 1-a flexible display panel; 2-a housing assembly; 20-a housing; 201-a first portion; 202-a second portion; 21-a slide; 211 — a first surface; 212-a second projection; 22-a fixing member; 221-a second surface; 222-a first projection; 23-a carrier; 24-a reel; 25-a connector; 3-a position detection component; 31-a transmitter; 32-a receiver; d-a first distance; e-a second distance; f-third distance.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Further, in the present application, directional terms such as "upper" and "lower" are defined with respect to a schematically-disposed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts that are used for descriptive and clarity purposes and that will vary accordingly with respect to the orientation in which the components are disposed in the drawings.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or indirectly connected through an intermediate. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The embodiment of the present application provides a flexible display device, and the flexible display device related to the embodiment of the present application may be, for example: the system comprises intelligent equipment with a network function, such as a tablet computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook computer, a Personal Digital Assistant (PDA), vehicle-mounted equipment, a network television, wearable equipment, a television and the like.

In the embodiments of the present application, specific forms of the flexible display device are not particularly limited, and for convenience of description, the flexible display device is taken as a mobile phone for example.

From a top view, as shown in fig. 1A, the flexible display device 100 includes a flexible display panel 1 and a housing assembly 2, and the flexible display panel 1 is placed in the housing assembly 2.

In some embodiments, the flexible display device 100 may be a display device in a roll-to-roll state, that is, the flexible display panel 1 may be rolled or unrolled to one side by a sliding manner, thereby achieving flexible adjustment of the area of the flexible display panel. Similar to the curling and stretching of a projector screen.

For the flexible display device 100 in the roll-sliding mode, the flexible display device 100 includes a fully rolled state, and a half rolled state (also referred to as a half rolled state). As shown in fig. 1A, the flexible display device 100 is in a fully rolled state, and the area of the display panel displayed by the flexible display device is the smallest. As shown in fig. 1B, the flexible display device 100 is in a fully unfolded state, and the flexible display device displays the largest area of the display panel. Of course, the flexible display device 100 may be in a half-unfolded state according to the needs of the user, so that the display panel displayed by the flexible display device 100 is the area size needed by the user.

It should be noted that the area of the display panel displayed by the flexible display device 100 refers to the area of the display panel in the field of view of the user, and does not include the area of the display panel that is rolled up and hidden in the housing assembly 2.

Regarding the flexible display panel 1, in some embodiments, the flexible display panel 1 is an Organic Light Emitting Diode (OLED) display panel, and the substrate and the cover plate of the flexible display panel 1 may be made of flexible resin materials.

With respect to the housing assembly 2, as shown in fig. 1A, the housing assembly 2 includes a housing 20, the housing 20 includes a first portion 201 and a second portion 202, and the first portion 201 and the second portion 202 are spliced.

As shown in fig. 2A, the housing assembly 2 further includes a sliding member 21 and a fixing member 22, and the sliding member 21 and the fixing member 22 are disposed correspondingly.

In the housing assembly 2, a first portion 201 of the housing 20 is connected to the slide 21 and a second portion 202 of the housing 20 is connected to the fixed member 22.

Illustratively, as shown in fig. 2A, the housing assembly 2 further includes a reel 24, the reel 24 is connected to the slider 21 through a connecting member 25, and during the movement of the slider 21 in the first direction X, the slider 21 drives the reel 24 to roll, so that the flexible display panel 1 can be wound or unwound on the reel 24. The sliding member 21 is used to drive the flexible display panel 1 to slide and roll along a first direction X, where the first direction X is a moving direction of the sliding member 21.

In the first direction X, the first distance D between the first surface 211 of the slide 21 facing the fixed part 22 and the second surface 221 of the fixed part 22 facing the slide 21 is not exactly equal.

The first distance D refers to a vertical distance between an extension plane of the first surface 211 and an extension plane of the second surface 221, and includes a vertical distance from a point, an edge, or a plane at each position on the second surface 221 to the first surface 211.

As shown in fig. 2A, the flexible display device 100 is in a fully rolled state with the slider in the starting position. As the slider 21 moves in the first direction X, the display area of the flexible display panel 1 gradually increases, eventually bringing the flexible display device 100 into a fully unfolded state, as shown in fig. 2B, when the slider 21 is in the extreme position.

Of course, the slider 21 moves in the first direction X, and the flexible display device 100 can also be returned from the fully unfolded state to the fully rolled state, and the slider 21 returns from the limit position to the starting position.

The slider 21 is moved in the first direction X, so that the flexible display device 100 can be in a half-unfolded state between a fully unfolded state and a fully rolled state, as shown in fig. 2C, that is, the slider 21 is in any position between the extreme position and the initial position.

As shown in fig. 2A, the flexible display device 100 further includes a position detecting assembly 3, configured to detect the first distance D during the sliding process of the flexible display panel 1 by the sliding member 21.

The position detecting assembly 3 includes a transmitter 31 and a receiver 32, wherein the transmitter 31 is used for transmitting signals, and the receiver 32 is used for receiving signals.

In addition, the flexible display device 100 further includes a printed wiring board electrically connected to the slider 21 and the position detection unit 3 for inputting electric signals, control signals, and the like to the slider 21 and the position detection unit 3, respectively.

In addition, the flexible display device 100 further includes a processor, which may be integrated in the printed wiring board, or may be provided separately from the printed wiring board.

The flexible display device 100 will be described in detail below with several examples.

Example 1

In some embodiments provided herein, the position sensing assembly 3 is fixedly coupled to the slider 21, as shown in fig. 2A.

In some embodiments, as shown in fig. 2A, the housing assembly 2 further includes a carrier 23, and the carrier 23 is fixedly connected to the sliding member 21 and the position detecting assembly 3. That is to say the position detection assembly 3 can be fixedly connected to the slide 21 via the carrier 23. The position detection assembly 3 may be located on a surface of the carrier 23 adjacent to the fixture 22.

Alternatively, in other embodiments, as shown in fig. 2D, the housing assembly 2 does not include the carrier 23, and the position detection assembly 3 is directly and fixedly connected to the fixing member 22.

Illustratively, as shown in fig. 2D, the position detecting member 3 is disposed on the first surface 211 of the slider 21.

Alternatively, as illustrated in fig. 2E, the position detection assembly 3 is provided on a third surface of the slider 21 intersecting the first surface 211.

Wherein the third surface may be a front surface of the slider 21 intersecting the first surface 211, a rear surface disposed opposite to the front surface, or a surface of an end of the slider 21 not connected to the flexible display panel 1. Fig. 2E is merely an example of the third surface as the front surface of the slider 21 intersecting the first surface 211.

The flexible display device 100 will be described in detail below by taking an example in which the housing assembly 2 includes the carrier 23, and the position detection assembly 3 is located on a surface of the carrier 23 close to the fixing member 22.

In some embodiments of the present application, as shown in fig. 2A, the second surface 221 has at least one first protrusion facing the first surface 211. The position detecting assembly 3 can detect the position of the sliding member 21 through the first protrusion 222.

Illustratively, the second surface 221 has a plurality of first protrusions 222 facing the first surface 211, and the plurality of first protrusions 222 includes at least two first protrusions 222 located at two ends of the fixing member 22.

It should be noted that the two first protrusions 222 are located at two ends of the fixing member 22, and it is understood that an edge of the first protrusion 222 coincides with an edge of the end portion of the fixing member 22, or the edge of the first protrusion 222 approximately coincides with the edge of the end portion of the fixing member 22, or the edge of the first protrusion 222 is close to the edge of the end portion of the fixing member 22. The present application is not limited to this, and the above positional relationship is the scope to be protected by the present application.

In some embodiments, the fixing member 22 includes a base 220 and a first protrusion 222, the first protrusion 222 and the base 220 are a unitary structure, and the first protrusion 222 faces the first surface 211 of the sliding member 21.

In other embodiments, as shown in fig. 2A, the fixing member 22 includes a base 220 and a first protrusion 222, and the first protrusion 222 is disposed on a surface of the base 220 close to the sliding member 21.

In some embodiments, as shown in fig. 2A, the second surface 221 has two first protrusions 222 facing the first surface 211, and the two first protrusions 222 are respectively located at two ends of the fixing member 22.

It will be appreciated that the second surface 221 is formed by the surface of the base 220 facing the slider 21 and the surface of the first projection 222 facing the slider 21, i.e. the second surface 221 is an undulating surface.

Based on this, in the case that the orthographic projection of the position detecting member 3 on the fixed member 22 is located within the fixed member 22 during the movement of the slider 21, the second distance E between the second surface 221 and the position detecting member 3 in the first direction X is not exactly equal.

It should be noted that the second distance E refers to a vertical distance from the position detection assembly 3 to each position on the second surface 221, and includes a vertical distance from the position detection assembly 3 to a point, an edge, or a surface of each position on the second surface 221.

Further, in a case where the position detection assembly 3 is located on the surface of the carrier 23 close to the fixing member 22, a first distance D between the first surface 211 and the second surface 221 is the same as a second distance E between the second surface 221 and the position detection assembly 3 along the first direction X.

The embodiment of the present application provides a method for controlling a flexible display device 100, as shown in fig. 3, including the following steps:

s100, the position detecting assembly 3 detects a first distance D between the first surface 211 of the sliding member 21 and the second surface 221 of the fixed member 22, and outputs a first signal.

In some embodiments of the present application, a photosensor is used to detect the first distance D between the first surface 211 of the sliding member 21 and the second surface 221 of the fixed member 22, and output a current signal as the first signal. The position detection assembly 3 now includes a transmitter 31 which is a light source that emits visible light. The receiver 32 is a light sensitive element that converts light signals into electrical signals.

It will also be understood that the position detection assembly 3 internally comprises a light sensitive sensor, which is a sensor that converts light signals into electrical signals using a light sensitive element. That is, the transmitter 31 emits a light signal with a certain intensity, and after passing through the position detection assembly 3, the light signal can be converted into a current signal with a corresponding intensity.

Illustratively, as shown in fig. 4, the position detecting assembly 3 detects the first distance D and outputs a current signal as the first signal, including the following steps:

s10, the emitter 31 of the position detection assembly 3 emits visible light.

Illustratively, the emitter 31 is a light source that can emit visible light.

S20, the second surface 221 reflects the visible light to obtain reflected light.

The visible light emitted by the light source is directed towards the second surface 221 of the fixture 22, and the second surface 221 may reflect the visible light to obtain the emitted light. Whereas the intensity of the reflected light is related to the distance between the second surface 221 and the light source (emitter 31), the distance between the second surface 221 and the light source (emitter 31) is the same as the second distance E between the second surface 221 and the position detecting member 3. That is to say the intensity of the reflected light is related to the second distance E between the second surface 221 and the position detecting member 3.

The smaller the distance (second distance E) between the second surface 221 and the light source (emitter 31), the smaller the area of the second surface 221 illuminated by the visible light emitted by the light source, and the smaller the area of the visible light that can be reflected by the second surface 221. The area of the visible light is proportional to the intensity of the visible light, and the intensity of the visible light that can be reflected by the second surface 221 is relatively small. The less intense visible light is reflected by the second surface 221 and the less intense the resulting reflected light.

Conversely, the greater the distance (second distance E) between the second surface 221 and the light source (emitter 31), the greater the area of the second surface 221 illuminated by the visible light emitted by the light source, and the greater the area of the visible light that can be reflected by the second surface 221. The area of the visible light is proportional to the intensity of the visible light, and the intensity of the visible light reflected by the second surface 221 is relatively large. The higher the intensity of the visible light reflected by the second surface 221, the greater the intensity of the resulting reflected light.

It can also be said that the intensity of the reflected light is proportional to the magnitude of the second distance E.

S30, the receiver 32 of the position detection assembly 3 receives part of the reflected light.

Only a part of the reflected light with an appropriate reflection angle can enter the receiver 31 (photosensor) of the position detection assembly, that is, the receiver 32 receives a part of the reflected light. The smaller the intensity of the reflected light, the less the intensity of the part of the reflected light received by the receiver 32, and even the zero intensity of the part of the reflected light received by the receiver 32. Conversely, the greater the intensity of the reflected light, the greater the intensity of the portion of the reflected light received by the receiver 32.

And S40, acquiring a current signal after passing through the photosensitive sensor.

The reflected light with different intensities received by the receiver 32 passes through the photosensitive sensor to obtain current signals with different intensities.

Illustratively, the intensity of the reflected light received by the receiver 32 is proportional to the current signal obtained after passing through the photosensor.

S50, the position detection module 3 outputs the current signal as the first signal.

A current signal of a certain intensity is obtained via the light sensitive sensor, which current signal corresponds to a certain intensity of the reflected light, which in turn corresponds to the second distance E between the second surface 221 and the position detection assembly 3.

And because the first distance D is the same as the second distance E in the case where the position detecting assembly 3 is located on the surface of the carrier 23 near the fixing member 22. Therefore, the current signal with a certain intensity may also correspond to the first distance D, so that the position detecting assembly 3 may detect the first distance D and output the current signal as the first signal.

In some embodiments, the current signal may also be converted into a digital signal reflecting the intensity of light by a digital-to-analog conversion circuit, and a second distance E between the position detection assembly 3 and the second surface 221 is obtained according to the digital signal, so that the first distance D may be detected

S200, the processor judges whether the sliding piece 21 is at the initial position and/or the limit position according to the first signal, and outputs a control signal under the condition that the sliding piece 21 is at the initial position or the limit position.

In some embodiments of the present application, a photosensitive sensor is used to detect the first distance D and output a current signal as the first signal, and the processor determines whether the sliding member 21 is at the initial and/or limit position according to the first signal by the following specific method:

for example, as shown in fig. 2A, when the flexible display device 100 is in the fully rolled state, the position detection assembly 3 on the carrier 23 corresponds to the first protrusion 222 (also labeled as the first protrusion (1)) at one end of the fixing member 22, and the second distance E between the first protrusion (1) and the position detection assembly 3 is smaller, and the first distance D is also smaller. After the visible light emitted from the emitter 31 (light source) is reflected by the first protrusion 222, the intensity of the part of the reflected light received by the receiver 32 is relatively small, so that the intensity of the first signal (current signal) output by the position detection assembly 3 is small, and the mark is that the visible light isI_minAt this time, the position detecting assembly 3 feeds back the slider 21 at the initial position.

For example, as shown in fig. 2B, when the flexible display device 100 is in the fully rolled state, the position detection assembly 3 corresponds to the first protrusion 222 (also labeled as the first protrusion (2)) at the other end of the fixing member 22, and the second distance E between the first protrusion (2) and the position detection assembly 3 is smaller, and the first distance D is also smaller. After the visible light emitted from the emitter 31 (light source) is reflected by the first protrusion 222 (second surface 221), the intensity of the part of the reflected light received by the receiver 32 is relatively small, so that the intensity of the first signal (current signal) output by the position detection assembly 3 is small, and is marked as I_minThe position detecting assembly 3 feeds back the slide 21 to the extreme position.

For example, as shown in fig. 2C, the flexible display device 100 is in a half-unfolded state (also referred to as a half-rolled state), the position detection assembly 3 corresponds to the surface of the substrate 220 of the fixing member 22, and the second distance E between the second surface 221 and the position detection assembly 3 is larger, and the first distance D is also larger. The intensity of the part of the reflected light received by the receiver 32 is relatively large after the visible light emitted by the emitter 31 (light source) is reflected by the substrate 220 (second surface 221), so that the intensity of the first signal (current signal) output by the position detection assembly 3 is large, and is marked as I_maxAt this time, the position detecting assembly 3 feeds back that the slider 21 is not at the home position or the extreme position.

In some embodiments, the maximum current I may be converted by a digital-to-analog conversion circuit, as shown in FIG. 5_maxAnd a minimum current signal I_minConverted to a digital signal reflecting the magnitude of the reflected light intensity received by the receiver 32 for display.

In the first direction X, during the movement of the slide 21 from the initial position to the extreme position, the second distance E between the position detection assembly 3 and the second surface 221 is first minimum, then maximum, and then minimum, and the intensity of the corresponding current signal is also first minimum, then maximum, and then minimum. In the first direction X, during the movement of the slide 21 from the extreme position to the starting position, the second distance E between the position detection assembly 3 and the second surface 221 is first minimum, then maximum, and then minimum, and the intensity of the corresponding current signal is also first minimum, then maximum, and then minimum. Along the first direction, the change of the magnitude of the second distance E is a discrete change, and the corresponding change of the intensity of the current signal is also a discrete change.

Specifically, a is defined as the minimum current signal I outputted by the position detecting element 3_minWhere a is 1 defined as an initial value, when the carrier 23 corresponds to the first protrusion 222, the flexible display device 100 is in the fully rolled state or the fully unfolded state, and n is the number of the

first protrusions

222, 2, … n, and n +1 ….

In the following, when a is 1, the flexible display device 100 is in the fully rolled state for example.

When a is 1, the flexible display device 100 is in a fully rolled state, and the sliding member 21 is located at the start position;

when 1< a < n, the flexible display device 100 is switched from the fully rolled state to the unfolded state, the flexible display device 100 is in a half-unfolded state (half-rolled state), and the slider 21 is located at any position between the initial position and the extreme position;

when a is n, the flexible display device 100 is in the fully unfolded state, and the slider 21 reaches the extreme position;

when n < a < 2n-1, the flexible display device 100 is switched from the fully unfolded state to the rolled state, the flexible display device 100 is in a half-unfolded state (half-rolled state), and the sliding member 21 is located at any position between the initial position and the extreme position;

when a is 2n-1, the flexible display device 100 is in the fully rolled state, and the slider 21 reaches the home position.

By analogy, the sliding member 21 can be roughly positioned, or the processor can determine the approximate position of the sliding member 21 according to the first signal.

In some embodiments, as shown in fig. 2A, the second surface 221 has two first protrusions 222 facing the first surface 211, and the two first protrusions 222 are respectively located at two ends of the fixing member 22, so that n is 2. As shown in fig. 5, the first protrusion 222 located at one end of the fixing member 22 is denoted as a first protrusion (1), and the first protrusion 222 located at the other end of the fixing member 22 is denoted as a first protrusion (2).

when a is 2, the flexible display device 100 is in the fully unfolded state, and the slider 21 reaches the extreme position;

when a is 3, the flexible display device 100 is in the fully rolled state, and the slider 21 reaches the home position.

By analogy, information can be obtained whether the slide 21 has reached the starting position or the extreme position.

In summary, the processor can determine the position of the slider 21 according to the first signal, for example, as shown in fig. 6, in the case that the slider 21 is at the home position or the extreme position (S201), the processor outputs the control signal Y (S202).

Alternatively, as shown in fig. 6, for example, in the case where the slider 21 does not reach the home position or the limit position (S201), the processor outputs the control signal N (S202').

And S300, the printed circuit board controls the sliding piece 21 to stop sliding according to the control signal.

Illustratively, as shown in fig. 6, the printed wiring board controls the slider 21 to stop moving according to the control signal Y (S300).

Alternatively, as shown in fig. 6, the printed circuit board controls the slider 21 to continue to operate until the specified position is moved according to the control signal N (S300').

Thus, by determining the position of the slider 21, the processor can feed back information in time. When the sliding part 21 reaches the initial position or the limit position, the processor outputs the control signal Y, so that the printed circuit board can timely control the sliding part 21 to stop moving according to the control signal Y, prevent the motor driving the sliding part 21 to move from being jammed and even damaging the flexible display device 100, and prolong the service life of the flexible display device 100.

The embodiment of the present application provides another control method of a flexible display device 100, as shown in fig. 3, including the following steps:

In other embodiments of the present application, an ultrasonic displacement sensor is used to detect the first distance D between the first surface 211 of the slider 21 and the second surface 221 of the fixed member 22, and output the first distance D as a first signal.

It will be appreciated that the position sensing assembly 3 internally comprises an ultrasonic displacement sensor which is made using the reflective properties of ultrasonic waves at the interface between two media. The transmitter 31 of the position detection assembly 3 may transmit an ultrasonic signal and the receiver 32 may receive the ultrasonic signal. The transmitter 31 transmits an ultrasonic signal to the second surface 221, the ultrasonic signal is reflected back through the second surface 221, and the reflected ultrasonic signal is received by the receiver 32. Generally, the propagation velocity V of the ultrasonic wave in the air is mainly related to the temperature T, for example, 331.5+0.607T, so that when the temperature is known, the velocity of the ultrasonic wave is determined. Therefore, by recording the time from the transmission of the ultrasonic signal from the transmitter 31 to the reception of the ultrasonic signal by the receiver 32, the first distance E between the position detecting member 3 and the second surface 221 can be obtained, and the first distance D between the first surface 211 of the slide member 21 and the second surface 221 of the fixed member 22 can be obtained.

Illustratively, as shown in fig. 7, the position detecting assembly 3 detects the first distance D and outputs the first distance D as the first signal, including the following steps:

s10', the transmitter 31 of the position detection module 3 transmits an ultrasonic signal, and records the time t1 at which the ultrasonic signal is transmitted.

S20', the second surface 221 reflects the ultrasonic signal to obtain a reflected ultrasonic signal.

S30', the receiver 32 of the position detection assembly 3 receives the reflected ultrasonic signal, and records the time t2 at which the reflected ultrasonic signal is received.

S40', the first distance D is obtained through the operation system.

The time difference Δ T between the transmission of the ultrasonic signal by the transmitter 31 and the reception of the reflected ultrasonic signal by the receiver 32 (Δ T ═ T2-T1) can be calculated by the arithmetic system in the position detector 3, and the speed of propagation of the ultrasonic signal in the air can be calculated, which is related to the temperature T only (V ═ 331.5+0.607T), and if the temperature is known, the speed of propagation of the ultrasonic signal is known. Based on this, the second distance E between the position detector 3 and the second surface 221 can be calculated by the formula (E ═ V × Δ t).

And because the first distance D is the same as the second distance E in the case where the position detecting assembly 3 is located on the surface of the carrier 23 near the fixing member 22. Thus, the second distance E is obtained as well as the first distance D.

S50', the position detection assembly 3 outputs the first distance D as a first signal.

In other embodiments of the present application, the ultrasonic displacement sensor is used to detect the first distance D and output the first distance D as a first signal, and the processor determines whether the sliding member 21 is located at the initial position and/or the extreme position according to the first signal, which is as follows:

for example, as shown in fig. 2A, when the flexible display device 100 is in the fully rolled state, the position detecting assembly 3 on the carrier 23 corresponds to the first protrusion 222 (also labeled as the first protrusion (1)) at one end of the fixing member 22, and the second distance E between the first protrusion (1) and the position detecting assembly 3 is smaller, also referred to as the first distance D, which is labeled as L, is smaller_min. The position detecting assembly 3 feeds back the slider 21 at the initial position at this time.

For example, as shown in fig. 2B, when the flexible display device 100 is in the fully rolled state, the position detection assembly 3 corresponds to the first protrusion 222 (also labeled as the first protrusion (2)) at the other end of the fixing member 22, and the second distance E between the first protrusion (2) and the position detection assembly 3 is smaller, also referred to as the first distanceD is smaller and marked L_min. The position detection assembly 3 now feeds back the slide 21 in the extreme position.

For example, as shown in fig. 2C, the flexible display device 100 is in a half-unfolded state (also referred to as a half-rolled state), the position detection assembly 3 corresponds to the surface of the substrate 220 of the fixing member 22, and the second distance E between the second surface 221 and the position detection assembly 3 is larger, and the first distance D is larger and marked as L_maxAt this time, the position detecting assembly 3 feeds back that the slider 21 is not at the home position or the extreme position.

In the first direction X, during the movement of the slide 21 from the initial position to the extreme position, the second distance E between the position detection assembly 3 and the second surface 221 is first minimum, then maximum, then minimum, and the corresponding first distance D is also first minimum, then maximum, then minimum. In the first direction X, during the movement of the slide 21 from the extreme position to the starting position, the second distance E between the position detection assembly 3 and the second surface 221 is first minimum, then maximum, then minimum, and the corresponding first distance D is also first minimum, then maximum, then minimum. The variation of the second distance E and the first distance D along the first direction is a discrete variation.

In some embodiments, b is defined as the position detection component 3 outputting the minimum first distance L_minWhere b is 1, 2, … n, and n +1 …, where b is 1 defined as an initial value, the carrier 23 corresponds to the first protrusion 222, the flexible display device 100 is in the fully rolled state or the fully unfolded state, and n is the number of the first protrusions 222.

In the following, when b is 1, the flexible display device 100 is in the fully rolled state for example.

When b is 1, the flexible display device 100 is in a fully rolled state, and the sliding member 21 is located at the start position;

when 1< b < n, the flexible display device 100 is switched from the fully rolled state to the unfolded state, the flexible display device 100 is in a half-unfolded state (half-rolled state), and the sliding member 21 is located at any position between the initial position and the limit position;

when b is equal to n, the flexible display device 100 is in the fully unfolded state, and the slider 21 reaches the extreme position;

when n < b < 2n-1, the flexible display device 100 is switched from the fully unfolded state to the rolled state, the flexible display device 100 is in a half-unfolded state (half-rolled state), and the sliding part 21 is located at any position between the initial position and the extreme position;

when b is 2n-1, the flexible display device 100 is in the fully rolled state, and the slider 21 reaches the home position.

In some embodiments, as shown in fig. 2A, the second surface 221 has two first protrusions 222 facing the first surface 211, and the two first protrusions 222 are respectively located at two ends of the fixing member 22, so that n is 2. As shown in fig. 8, the first protrusion 222 located at one end of the fixing member 22 is denoted as a first protrusion (1), and the first protrusion 222 located at the other end of the fixing member 22 is denoted as a first protrusion (2).

when b is 2, the flexible display device 100 is in the fully unfolded state, and the slider 21 reaches the extreme position;

when b is 3, the flexible display device 100 is in the fully rolled state, and the slider 21 reaches the home position.

In other embodiments, as shown in fig. 9A, the second surface 221 has more than two first protrusions 222 facing the first surface 211, and two first protrusions 222 of the plurality of first protrusions 222 are respectively located at two ends of the fixing member 22.

It can also be understood that the second surface 221 has a plurality of first protrusions 222 facing the first surface 211, and the plurality of first protrusions 222 are arranged at intervals.

As for the control method of the flexible display device 100, as in the case where the second surface 221 has two first protrusions 222, reference may be made to the description regarding fig. 3, including the following steps:

s1000, the position detecting assembly 3 detects a first distance D between the first surface 211 of the sliding member 21 and the second surface 221 of the fixed member 22, and outputs a first signal.

S1000 is the same as S100 described above, and reference may be made to the related description above.

S2000, the processor judges whether the sliding piece 21 is at the initial position and/or the limit position according to the first signal, and outputs a control signal under the condition that the sliding piece 21 is at the initial position or the limit position.

S2000 will be described in detail by taking the example of detecting the first distance D by using a photosensor.

For example, as shown in fig. 9A, when the flexible display device 100 is in the fully rolled state, the position detection assembly 3 on the carrier 23 corresponds to the first protrusion 222 (also labeled as the first protrusion (1)) at one end of the fixing member 22, and the second distance E between the first protrusion (1) and the position detection assembly 3 is smaller, and the first distance D is also smaller. After the visible light emitted from the emitter 31 is reflected by the first protrusion 222, the intensity of the part of the reflected light received by the receiver 32 is relatively small, so that the intensity of the first signal (current signal) output by the position detection assembly 3 is small, and is marked as I_minAt this time, the position detecting assembly 3 feeds back the slider 21 at the initial position.

For example, as shown in fig. 9B, when the flexible display device 100 is in the fully rolled state, the position detection assembly 3 corresponds to the first protrusion 222 (which may also be labeled as the first protrusion (n)) located at the other end of the fixing member 22, and the second distance E between the first protrusion (n) and the position detection assembly 3 is smaller, and the first distance D is also smaller. After the visible light emitted from the transmitter 31 is reflected by the first protrusion 222 (the second surface 221), the intensity of the part of the reflected light received by the receiver 32 is relatively small, so that the intensity of the first signal (the current signal) output by the position detection assembly 3 is small, and is marked as I_minThe position detecting assembly 3 feeds back the slide 21 to the extreme position.

For example, as shown in fig. 9C, when the flexible display device 100 is in a half-extended state (also referred to as a half-rolled state), the position detection assembly 3 corresponds to a gap (the surface of the substrate 220) between adjacent first protrusions 222, and the second distance E between the second surface 221 and the position detection assembly 3 is larger, which can also be referred to as a second distance EThe first distance D is large. After the visible light emitted from the emitter 31 is reflected by the substrate 220 (the second surface 221), the intensity of the part of the reflected light received by the receiver 32 is relatively large, so that the intensity of the first signal (the current signal) output by the position detection assembly 3 is large, and is marked as I_maxAt this time, the position detecting assembly 3 feeds back that the slider 21 is not at the home position or the extreme position.

In some embodiments, the maximum current I may be converted by a digital-to-analog conversion circuit, as shown in FIG. 10_maxAnd a minimum current signal I_minConverted to a digital signal reflecting the magnitude of the reflected light intensity received by the receiver 32 for display.

During the movement of the slider 21 along the first direction X, the second distance E between the position detection assembly 3 and the second surface 221 varies discretely, and the corresponding current signal intensity also varies discretely.

Specifically, c is defined as the minimum current signal I outputted by the position detecting element 3_minWhere c is 1, 2, … n, and n +1 …, where c is 1 defined as an initial value, the carrier 23 corresponds to the first protrusion 222, the flexible display device 100 is in the fully rolled state or the fully unfolded state, and n is the number of the first protrusions 222. As shown in fig. 10, the first protrusion 222 located at one end of the fixing member 22 is denoted as a first protrusion (1), and the first protrusion 222 located at the other end of the fixing member 22 is denoted as a first protrusion (n). Along the first direction X, the plurality of first protrusions 222 are respectively marked as a first protrusion (1), a first protrusion (2), a first protrusion (3), a first protrusion (4) … …, a first protrusion (n-1), and a first protrusion (n).

In the following, when c is 1, the flexible display device 100 is in the fully rolled state for example.

When c is 1, the flexible display device 100 is in a fully rolled state, and the sliding member 21 is located at the start position;

when 1< c < n, the flexible display device 100 is switched from the fully rolled state to the unfolded state, the flexible display device 100 is in a half-unfolded state (half-rolled state), and the slider 21 is located at any position between the initial position and the extreme position;

when c is equal to n, the flexible display device 100 is in the fully unfolded state, and the slider 21 reaches the extreme position;

when n < c < 2n-1, the flexible display device 100 is switched from the fully unfolded state to the rolled state, the flexible display device 100 is in a half-unfolded state (half-rolled state), and the sliding part 21 is located at any position between the initial position and the extreme position;

when c is 2n-1, the flexible display device 100 is in the fully rolled state, and the slider 21 reaches the home position.

By analogy, the slider 21 can be roughly positioned, and the processor can determine the approximate position of the slider 21 according to the first signal.

And S3000, controlling the sliding part 21 to stop sliding by the printed circuit board according to the control signal.

S3000 is the same as S300 described above, and reference may be made to the related description above.

Thus, on the one hand, by determining the position of the slide 21, the processor can feed back information in time. When the sliding part 21 reaches the initial position or the limit position, the processor outputs the control signal Y, so that the printed circuit board can timely control the sliding part 21 to stop moving according to the control signal Y, prevent the motor driving the sliding part 21 to move from being jammed and even damaging the flexible display device 100, and prolong the service life of the flexible display device 100. On the other hand, in the process that the sliding member 21 moves along the first direction X, the flexible display panel 1 can be driven to slide and roll, so that the flexible display device 100 displays different display areas. According to the size of the first protrusions 222 arranged at intervals and the size of the gap between the adjacent first protrusions 222, the display area displayed by the flexible display device 100 can be roughly detected in real time, so that the required display area can be flexibly set.

In some embodiments of the present application, the second surface 221 has at least one first protrusion facing the first surface 211. Illustratively, as shown in fig. 11, the second surface 221 has a first protrusion 222 facing the first surface 211.

As shown in fig. 11, the first protrusion 222 may be located at any end of the fixing member 22, for example, the first protrusion 222 is located at the other end of the fixing member 22.

Regarding the control method of the flexible display device 100, when the second surface 221 has one first protrusion 222 and the second surface 221 has two first protrusions 222, reference may be made to the related description above.

Wherein the flexible display device 100 is in a fully extended state with the slider 21 in the extreme position, as shown in fig. 11.

The processor determines whether the slider 21 is at the limit position based on the first signal, and outputs a control signal Y when the slider 21 is at the limit position. Therefore, the printed circuit board timely controls the sliding part 21 to stop moving according to the control signal Y, so as to prevent the motor driving the sliding part 21 to move from being locked and even damaging the flexible display device 100, and prolong the service life of the flexible display device 100.

Example two

Example two differs from example one in that the second surface 221 is a bevel.

In some embodiments, as shown in fig. 12A, the fixed member 22 has a wedge-shaped structure, and the second surface 221 of the fixed member 22 facing the sliding member 21 is a slope.

It can also be understood that the second surface 221 is not parallel to the flexible display panel 1. The plane of the second surface 221 intersects the plane of the flexible display panel 1.

It should be noted that, the flexible display panel 1 herein refers to a flexible display panel in the field of view of the user, and does not include the rolled portion of the flexible display panel 1, and the edge of the flexible display panel in the field of view to be rolled.

Similarly, the second distance E refers to a vertical distance from the position detection member 3 to each position on the second surface 221, and may also be understood as a vertical distance from the position detection member 3 to each point on the second surface 221 at each position.

In the case where the position detecting assembly 3 is located on the surface of the carrier 23 close to the fixing member 22, a first distance D between the first surface 211 and the second surface 221 is the same as a second distance E between the second surface 221 and the position detecting assembly 3 along the first direction X.

s500, the position detecting assembly 3 detects a first distance D between the first surface 211 of the sliding member 21 and the second surface 221 of the fixed member 22, and outputs a first signal.

S500 is the same as S100 described above, and reference may be made to the related description above.

S600, the processor judges whether the sliding piece 21 is at the initial position and/or the limit position according to the first signal, and outputs a control signal under the condition that the sliding piece 21 is at the initial position or the limit position.

S600 will be described in detail by taking the photosensitive sensor as an example for detecting the first distance D.

Illustratively, as shown in fig. 12A, the flexible display device 100 is in a fully rolled state, and the position detection assembly 3 on the carrier 23 corresponds to one end of the fixing member 22. Wherein one end of the fixed member 22 is farther away from the first surface 211 of the sliding member 21 than the other end of the fixed member 22. In this case, the second distance E between the second surface 221 and the position detection element 3 is the largest, and the first distance D at this time may be said to be the largest. Then, the intensity of the part of the reflected light received by the receiver 32 is maximized after the visible light emitted by the transmitter 31 is reflected by the second surface 221, so that the intensity of the first signal (current signal) output by the position detection assembly 3 is maximized, which is marked as I_max. The position detecting assembly 3 feeds back the slider 21 at the initial position at this time.

Illustratively, as shown in fig. 12B, the flexible display device 100 is in a fully unfolded state, and the position detection assembly 3 on the carrier 23 corresponds to the other end of the fixing member 22. Wherein the other end of the fixed member 22 is closer to the first surface 211 of the sliding member 21 than the one end of the fixed member 22. In this case, the second surface 221 and the position detecting element3, or the first distance D at that time, is the smallest. Then, the intensity of the part of the reflected light received by the receiver 32 is minimal after the visible light emitted by the transmitter 31 is reflected by the second surface 221, and thus the intensity of the first signal (current signal) output by the position detection assembly 3 is minimal, which is marked as I_min. The position detection assembly 3 now feeds back the slide 21 in the extreme position.

For example, as shown in fig. 12C, the flexible display device 100 is in a half-unfolded state (also referred to as a half-rolled state), and the position detection assembly 3 on the carrier 23 corresponds to a position other than both ends of the fixing member 22. In this case, the second distance E between the second surface 221 and the position detection assembly 3 is between the maximum value and the minimum value. Then, after the visible light emitted from the emitter 31 is reflected by the second surface 221, the intensity of the part of the reflected light received by the receiver 32 is between the maximum intensity and the minimum intensity, so that the intensity of the first signal (current signal) output by the position detection assembly 3 is between the maximum value and the minimum value, which is labeled as I_X. The position detection assembly 3 now feeds back the slide 21 to a position somewhere between the starting position and the extreme position.

In some embodiments, the maximum current I may be converted by a digital-to-analog conversion circuit, as shown in FIG. 13_maxAnd a minimum current signal I_minConverted to a digital signal reflecting the magnitude of the reflected light intensity received by the receiver 32 for display.

Unlike the above S200, in the process of the slider 21 from the home position to the extreme position along the first direction X, the second distance E between the position detection assembly 3 and the second surface 221 gradually decreases, which is a continuously changing process. The intensity of the corresponding current signal (first signal) is also gradually reduced, and is a continuously changing process. In the first direction X, the second distance E between the position detecting assembly 3 and the second surface 221 gradually increases from the extreme position to the initial position of the slider 21, which is a continuously varying process. The intensity of the corresponding current signal (first signal) also gradually increases, which is a continuously changing process.

As shown in fig. 13, the processor may determine whether the slider 21 reaches the home position or the limit position based on the first signal, thereby outputting a control signal.

And S700, the printed circuit board controls the sliding piece 21 to stop sliding according to the control signal.

S700 is the same as S300 described above, and reference may be made to the related description above.

In addition, the processor can determine the specific position of the slider 21 according to the first signal. Illustratively, as shown in fig. 14, the slider 21 is in a position between the home position and the extreme position. At this time, the distance between the position detection assembly 3 and one end of the fixed member 22 is Z, and it can be said that the distance that the sliding member 21 moves relative to the initial position along the first direction X is Z. Wherein one end of the fixed member 22 is farther away from the first surface 211 of the sliding member 21 than the other end of the fixed member 22.

Z can be represented by the formula Z ═ H₀-h₀Calculated as-E)/tan α.

Wherein H₀The distance h between the position detecting unit 3 and the surface of the fixing member 22 away from the position detecting unit 3₀Is the bottom thickness of the wedge-shaped fixture 22, E is the detected second distance, and α is the angle of inclination of the second surface 221 with respect to the flexible display panel 1.

Thus, as long as H₀、h₀And alpha data are known, so long as the second distance E can be detected in real time, Z can be detected in real time, that is, the detailed position of the slider 21 can be detected in real time.

In addition, the sliding member 21 can drive the flexible display panel 1 to slide and roll in the process of moving along the first direction X, so that the flexible display device 100 displays different display areas. The display area displayed by the flexible display device 100 can be detected according to the distance Z.

For example, when the sliding member 21 reaches the initial position, the flexible display device 100 is in the fully rolled state, and the display area displayed by the flexible display device 100 is S₀. The width (or length) of the flexible display panel 1 in the direction intersecting the first direction X is M. When the sliding member 21 moves in the first direction X by a distance Z relative to the initial position, the flexible display device 100 is in a semi-unfolded state, and the flexible display device is flexibleThe display device 100 exhibits a display area S-S₀+Z×M。

In this way, since the second distance E is continuously variable, the detected distance Z of the sliding member 21 moving along the first direction X is also continuously variable, and the display area displayed by the flexible display device 100 can be accurately detected in real time according to Z, so that the required display area can be flexibly set.

Example three

Example three differs from the above-described examples one and two in that the position detection assembly 3 is fixedly connected to the fixing member 22.

Illustratively, as shown in fig. 15A, the position detecting member 3 is located on the second surface 221 of the fixing member 22.

In some embodiments of the present application, the first surface 211 has a plurality of second protrusions 212, and the plurality of second protrusions 212 includes at least two second protrusions 212 located at both ends of the sliding member 21.

Illustratively, as shown in fig. 15A, the first surface 211 has two second protrusions 212, and the two second protrusions 212 are respectively located at two ends of the sliding member 21.

In the case that the orthographic projection of the position detecting assembly 3 on the slider 21 is located inside the slider 21 during the movement of the slider 21, the third distance F between the first surface 211 and the position detecting assembly 3 is not exactly equal along the first direction X.

Similarly, the third distance F refers to a vertical distance from the position detection element 3 to each position on the first surface 211, and includes a vertical distance from the position detection element 3 to a point, an edge, or a surface of each position on the first surface 211.

Further, in the case where the position detection member 3 is located on the second surface 221, the third distance F is the same as the first distance D.

Regarding the control method of the flexible display device 100, the same control method as that of the position detection assembly 3 and the sliding member 21 when the second surface 221 has two first protrusions 222 can be referred to the above related description.

Alternatively, as shown in fig. 15B, the first surface 211 has two or more second protrusions 212, and the two or more second protrusions 212 include at least two second protrusions 212 located at both ends of the sliding member 21.

Regarding the control method of the flexible display device 100, the same control method as that when the position detecting assembly 3 is fixedly connected to the sliding member 21 and the second surface 221 has two or more first protrusions 222 can be referred to the above related description.

In other embodiments of the present application, the first surface 211 is a bevel.

Illustratively, as shown in fig. 16, the sliding member 21 has a wedge-shaped structure, and the first surface 211 of the sliding member 21 facing the fixed member 22 is a slope.

That is, the first surface 211 is not parallel to the flexible display panel 1. The plane of the first surface 211 intersects the plane of the flexible display panel 1.

Also, the flexible display panel 1 herein refers to a flexible display panel in the field of view of the user, excluding the rolled portion of the flexible display panel 1, and the edge of the flexible display panel in the field of view to be rolled.

Regarding the control method of the flexible display device 100, the same control method as that when the second surface 221 is a slant surface when the position detecting assembly 3 is fixedly connected to the sliding member 21 can be referred to the above related description.

In summary, on the one hand, by determining the position of the sliding member 21, the processor can feed back information in time. When the sliding part 21 reaches the initial position or the limit position, the processor outputs the control signal Y, so that the printed circuit board can timely control the sliding part 21 to stop moving according to the control signal Y, prevent the motor driving the sliding part 21 to move from being jammed and even damaging the flexible display device 100, and prolong the service life of the flexible display device 100. On the other hand, in the process that the sliding member 21 moves along the first direction X, the flexible display panel 1 can be driven to slide and roll, so that the flexible display device 100 displays different display areas. According to the size of the plurality of first protrusions 222 arranged at intervals and the size of the gap between adjacent first protrusions 222, the display area displayed by the flexible display device 100 can be roughly detected in real time. In another aspect, when the second surface 221 is a slant surface, the second distance E is continuously variable, and the detected distance Z of the sliding member 21 moving along the first direction X is also continuously variable, so that the display area displayed by the flexible display device 100 can be accurately detected in real time according to Z, and the required display area can be flexibly set.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A flexible display device, comprising:

a flexible display panel;

the shell assembly comprises a sliding part and a fixed part, and the sliding part and the fixed part are correspondingly arranged; in a first direction, a first distance between a first surface of the sliding part facing the fixed part and a second surface of the fixed part facing the sliding part is not equal to each other; the sliding part is used for driving the flexible display panel to slide and roll;

the position detection assembly is used for detecting the first distance in the process that the sliding piece drives the flexible display panel to slide and roll;

wherein the first direction is a direction in which the slider moves.

2. The flexible display device of claim 1, wherein the position detection assembly is fixedly connected to the slider;

a second distance between the second surface and the position detection assembly along the first direction is not exactly equal;

wherein, in the moving process of the sliding part, the orthographic projection of the position detection assembly on the fixed part is positioned in the fixed part.

3. The flexible display device of claim 2, wherein the second surface has at least one first protrusion facing the first surface.

4. The flexible display device of claim 3, wherein the second surface has a plurality of first protrusions;

the plurality of first protrusions at least comprises two first protrusions positioned at two ends of the fixing piece.

5. The flexible display device of claim 2, wherein the second surface is a bevel.

6. The flexible display device of any of claims 2-5, wherein the position detection assembly is disposed on the first surface;

alternatively, the first and second electrodes may be,

the position detecting assembly is disposed on a third surface of the slider intersecting the first surface.

7. The flexible display device of any of claims 2-5, wherein the housing assembly further comprises a carrier fixedly connected to the slider and the position sensing assembly, respectively.

8. The flexible display device of claim 1, wherein the position detection assembly is fixedly connected to the fixture;

a third distance between the first surface and the position detection assembly along the first direction is not exactly equal;

wherein, during the movement of the sliding part, the orthographic projection of the position detection assembly on the sliding part is positioned in the sliding part.

9. The flexible display device of claim 8, wherein the first surface has a plurality of second protrusions; the plurality of second protrusions at least comprises two second protrusions positioned at two ends of the sliding piece;

alternatively, the first and second electrodes may be,

the first surface is a bevel.

10. The flexible display device of claim 1, wherein the housing assembly further comprises a housing comprising a first portion and a second portion, the first portion and the second portion being spliced;

the first portion is connected with the sliding member, and the second portion is connected with the fixed member.

11. The flexible display device of claim 1, further comprising a printed wiring board electrically connected to the slider and the position sensing assembly.

12. A method of controlling a flexible display device according to any one of claims 1 to 11, comprising:

the position detection assembly detects a first distance between a first surface of the sliding part and a second surface of the fixed part and outputs a first signal;

the processor judges whether the sliding piece is at the starting position and/or the limiting position or not according to the first signal, and outputs a control signal under the condition that the sliding piece is at the starting position or the limiting position;

and the printed circuit board controls the sliding piece to stop moving according to the control signal.

13. The method of claim 12, wherein the position detecting assembly detects a first distance between a first surface of the sliding member and a second surface of the fixed member and outputs a first signal, comprising:

detecting the first distance between the first surface of the sliding member and the second surface of the fixed member with a photosensor, and outputting a current signal as the first signal.

14. The method of claim 12, wherein the position detecting assembly detects a first distance between a first surface of the sliding member and a second surface of the fixed member and outputs a first signal, comprising:

detecting the first distance between the first surface of the slider and the second surface of the fixed member with an ultrasonic displacement sensor, and outputting the first distance as the first signal.

15. The method for controlling a flexible display device according to any one of claims 12 to 14, further comprising:

the processor is used for judging the position of the sliding part according to the first signal.