WO2018218549A1

WO2018218549A1 - Flexible screen, and bending state detection method and capacitance compensation method therefor

Info

Publication number: WO2018218549A1
Application number: PCT/CN2017/086726
Authority: WO
Inventors: 安智; 周瑜
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2018-12-06
Also published as: CN109643193A; CN109643193B

Abstract

A flexible screen (100), comprising a functional layer (130) and a bending detection sensor layer (150) arranged in a stacked manner. The bending detection sensor layer (150) comprises at least one bending detection sensor module (1500), the bending detection sensor module (1500) comprising a detection signal transmitter (151), a detection signal conducting layer (153) and a first detection signal receiver (155), wherein the detection signal transmitter (151) and the first detection signal receiver (155) are respectively arranged at two opposite sides of the flexible screen (100); the detection signal conducting layer (153) is connected between the detection signal transmitter (151) and the first detection signal receiver (155), and is used for conducting a detection signal transmitted by the detection signal transmitter (151) to the first detection signal receiver (155) for reception, so as to excite the first detection signal receiver (155) to generate a first current signal, with the first current signal being used for determining the bending state of the flexible screen (100). Further provided are a bending state detection method and a capacitance compensation method for a flexible screen (100), wherein same can achieve bending state detection of a flexible screen (100).

Description

Flexible screen and bending state detecting method thereof and capacitor compensation method

Technical field

The present invention relates to the field of flexible screen technologies, and in particular, to a flexible screen, a bending state detecting method thereof, and a capacitor compensation method.

Background technique

The flexible screen has the characteristics of low power consumption and flexibility, and can be applied to products such as smart terminals and wearable devices, thereby providing an excellent product experience for users. How to detect the bending state of the flexible screen when it is subjected to bending is a problem that needs to be solved in the field of flexible screen technology. At present, in the prior art, conductive particles are used to conduct the upper and lower layers to detect the bending state of the flexible screen as the double-layer conductive film is deformed. This method needs to add a plurality of thick conductive particles in the thickness direction, which is disadvantageous for flexible display. The thinness of the screen and the long-term reliability of particle dynamic deformation are risky. In addition, the optical fiber cable is separately disposed on the periphery of the visible area of the flexible screen, and the bending state of the flexible screen is detected by detecting the photoelectric transmission time and displacement in the optical fiber cable under bending. This method needs to be separately set at the periphery of the visible area. Fiber optic cable is also not conducive to ultra-thin integration of products.

Summary of the invention

In view of the above problems in the prior art, embodiments of the present invention provide a thin and light flexible screen, a bending state detecting method thereof, and a capacitor compensation method.

A flexible screen comprising: an overlapping functional layer and a bending detection sensor layer, the bending detection sensor layer comprising at least one bending detection sensor module, the bending detection sensor module comprising a detection signal transmitter and a detection signal conducting layer And a first detection signal receiver, the detection signal transmitter and the first detection signal receiver are disposed at a relative position within the flexible screen, and the detection signal conducting layer is connected to the detection signal transmitter and the Between the first detection signal receivers, for transmitting the detection signal transmitted by the detection signal transmitter to the first detection signal receiver for exciting to generate the first current signal by the first detection signal receiver The first current signal is used to determine a bending state of the flexible screen.

A bending state detecting method for a flexible screen, the inside of the flexible screen is provided with a bending detecting sensor layer, the bending detecting sensor layer comprising at least one bending detecting sensor module, wherein the bending detecting sensor module comprises a detection signal transmission sequentially connected And a signal transduction layer and a first detection signal receiver, the detection method comprising:

Transmitting a detection signal by the detection signal transmitter, and transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer to excite the first detection signal receiver to generate a first current signal;

Determining a bending state of the flexible screen according to a size of the first current signal.

A capacitance compensation method for a flexible screen, comprising:

Detecting a bending state of the flexible screen by a bending detection sensor layer inside the flexible screen;

The capacitance of the flexible screen at the bent position is compensated according to the curved state of the flexible screen.

In the flexible screen according to the embodiment of the present invention, the bending detection sensor layer is disposed by laminating the functional layer, and the bending detection sensor layer includes at least one bending detection sensor module, and the bending detection sensor module includes a detection signal transmitter, a detection signal conducting layer and a first detection signal receiver connected in sequence, and the detection signal transmitter and the first detection signal receiver are respectively located at opposite positions within the flexible screen, when When the flexible screen is in a bent state, the detection signal may be transmitted by the detection signal transmitter, and the detection signal is transmitted to the first detection signal receiver by the detection signal conducting layer to trigger the first The detection signal receiver generates a first current signal, so that the bending state of the flexible screen can be conveniently determined according to the size of the first current signal, and the capacitance of the flexible screen can be performed according to the bending state of the flexible screen. Compensation, thereby improving the touch precision of the flexible screen.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

1 is a first schematic structural diagram of a flexible screen according to an embodiment of the present invention;

2 is a first schematic structural diagram of a bending detection sensor module of a flexible screen according to an embodiment of the present invention;

3 is a second structural diagram of a bending detection sensor module of a flexible screen according to an embodiment of the present invention; intention;

4 is a second schematic structural diagram of a flexible screen according to an embodiment of the present invention;

FIG. 5 is a third schematic structural diagram of a flexible screen according to an embodiment of the present invention; FIG.

6 is a schematic view showing a fourth structure of a flexible screen according to an embodiment of the present invention;

FIG. 7 is a fifth schematic structural diagram of a flexible screen according to an embodiment of the present invention; FIG.

FIG. 8 is a first schematic flowchart diagram of a method for detecting a bending state of a flexible screen according to an embodiment of the present invention; FIG.

9A to FIG. 9C are schematic diagrams showing a first application scenario of a method for detecting a bending state of a flexible screen according to an embodiment of the present invention;

10 is a second schematic flowchart of a method for detecting a bending state of a flexible screen according to an embodiment of the present invention;

11A to FIG. 11C are schematic diagrams showing a second application scenario of a method for detecting a bending state of a flexible screen according to an embodiment of the present invention;

12 is a first schematic flowchart of a method for compensating a capacitance of a flexible screen according to an embodiment of the present invention;

FIG. 13 is a second schematic flowchart of a method for compensating a capacitance of a flexible screen according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, a flexible screen 100 is provided, including: a functional layer 130 and a bend detecting sensor layer 150. The functional layer 130 is stacked with the bending detection sensor layer 150. The bending detection sensor layer 150 includes at least one bending detection sensor module 1500, and the bending detection sensor module 1500 includes a detection signal transmitter 151, a detection signal conducting layer 153, and a first detection signal receiver 155, the detection signal The transmitter 151 and the first detection signal receiver 155 are disposed at opposite positions in the flexible screen 100, and the detection signal conducting layer 153 is connected to the detection signal transmitter 151 and the first detection signal receiver. Between 155, a detection signal for transmitting the detection signal transmitter 151 is transmitted to the first detection signal receiver 155 for reception. The first detection signal receiver 155 is excited to generate a first current signal for determining a bending state of the flexible screen 100, for example, determining a degree of bending of the flexible screen 100 as a whole.

It can be understood that the functional layer 130 can be a touch layer. Correspondingly, the flexible screen 100 can be a flexible touch screen. Alternatively, the functional layer 130 can also be a light emitting layer. Accordingly, the flexible screen 100 can be The flexible display screen; or the functional layer 130 may also include a light emitting layer and a touch layer. Accordingly, the flexible screen 100 may be a flexible touch display screen.

In one embodiment, the flexible screen 100 further includes a driving array layer 110, the functional layer 130 includes a light emitting layer 131, and the detecting signal conducting layer 153 is disposed on the driving array layer 110 and the light emitting layer 131. Between, as shown in Figure 1. A first supporting layer 1531 is disposed between the detecting signal conducting layer 153 and the driving array layer 110, and a second supporting layer 1533 is disposed between the detecting signal conducting layer 153 and the light emitting layer 131. In the embodiment, the first support layer 1531 and the second support layer 1533 are made of a transparent insulating material. The refractive index of the detection signal conducting layer 153 is greater than the refractive index of other layers adjacent to the detection signal conducting layer 153, that is, greater than the refractive indices of the first supporting layer 1531 and the second supporting layer 1533.

Referring to FIG. 2, in an embodiment, the detection signal emitter 151 may be an invisible light emitter, such as an infrared light emitter, an ultraviolet light emitter, a laser emitter, or the like. The detection signal conducting layer 153 may be a corresponding invisible light guiding layer, and the first detection signal receiver 155 may be a photoelectric sensor corresponding to the invisible light emitter 151. In the present embodiment, the detection signal emitter 151 includes a first confinement layer 1511, a second confinement layer 1513, and an active layer 1515. The active layer 1515 is disposed on the first confinement layer 1511 and the Between the two confinement layers 1513 and connected to the detection signal conducting layer 153, the active layer 1515 is configured to emit a detection signal under the driving of the first confinement layer 1511 and the second confinement layer 1513, and The detection signal is conducted to the first detection signal receiver 155 through the detection signal conducting layer 153. The first detection signal receiver 155 includes a P-type semiconductor 1551 and an N-type semiconductor 1553, and the P-type semiconductor 1551 and the N-type semiconductor 1553 constitute a PN junction, and a contact surface of the P-type semiconductor 1551 and the N-type semiconductor 1553 ( That is, the junction of the PN junction is perpendicular to the detection signal conducting layer 153. The first detection signal receiver 155 is configured to receive the detection signal and generate a corresponding first current signal.

The active layer 1515 and the detection signal conducting layer 153 are integrally manufactured in the same process, thereby effectively simplifying the production process and improving production efficiency. The active layer 1515 and the detection signal conducting layer 153 The first layer is a continuously distributed integrally manufactured material layer, and a portion of the material layer between the first confinement layer 1511 and the second confinement layer 1513 forms an active layer 1515, and the material layer is located at the first confinement layer 1511 and the second layer. A portion other than the confinement layer 1513 forms the detection signal conducting layer 153. The material layer is also directly in contact with the P-type semiconductor 1551 or the N-type semiconductor 1553 of the first detection signal receiver 155 to directly transmit the detection signal into the first detection signal receiver 155.

The invisible light emitting signal emitted by the invisible light emitter from the first side of the flexible screen 100 is reflected by the invisible light guiding layer and transmitted to a photosensor disposed on a second side of the flexible screen 100, through the photoelectric The sensor performs photoelectric sensing to generate a corresponding first current signal, and further, by detecting a magnitude of the first current signal, determining a loss rate of the invisible light signal during conduction from the first side to the second side And determining a bending state of the flexible screen 100 according to a loss rate of the invisible light signal.

Referring to FIG. 3, in an embodiment, the detection signal emitter 151 may be an ultrasonic wave transmitting unit, the detecting signal conducting layer 153 may be an ultrasonic waveguide layer, and the first detecting signal receiver 155 may be an ultrasonic wave. Receiving unit. In the present embodiment, the detection signal emitter 151 includes a first piezoelectric film 1512 and a second piezoelectric film 1514, and the first piezoelectric film 1512 and the second piezoelectric film 1514 are respectively disposed on the The opposite sides of the signal conducting layer 153 are detected for generating an ultrasonic detecting signal under the driving of a preset voltage, and the detecting signal is transmitted to the first detecting signal receiver 155 through the detecting signal conducting layer 153. The first detection signal receiver 155 includes a third piezoelectric film 1552 and a fourth piezoelectric film 1554. The third piezoelectric film 1552 and the fourth piezoelectric film 1554 are respectively disposed on the detection signal conducting layer 153. Relative sides. The first detection signal receiver 155 is configured to receive the detection signal and generate a corresponding first current signal.

Similarly, in the embodiment, the material layer composed of the detection signal conducting layer 153 is also continuously distributed, and one end of the material layer is sandwiched between the first piezoelectric film 1512 and the second piezoelectric film 1514, and the other end is sandwiched. It is disposed between the third piezoelectric film 1552 and the fourth piezoelectric film 1554.

The ultrasonic signal emitted by the ultrasonic transmitting unit from the first side of the flexible screen 100 is reflected by the ultrasonic waveguide layer and transmitted to an ultrasonic receiving unit disposed on the second side of the flexible screen 100, and generates a corresponding a current signal, which in turn can determine a loss of the ultrasonic signal during conduction from the first side to the second side by detecting a magnitude of the first current signal The rate of consumption, and determining the bending state of the flexible screen 100 based on the loss rate of the ultrasonic signal.

Referring to FIG. 4, in an embodiment, the bending detection sensor module 1500 further includes a plurality of second detection signal receivers 157 spaced along the detection signal conducting layer 153 for receiving from the detection. a portion of the detection signal refracted by the signal conducting layer 153 and generating a plurality of second current signals for determining a curvature of the flexible screen 100 at a position of the plurality of second detection signal receivers 157 The state, for example, determines the degree of bending and the direction of bending of the position where each of the second detection signal receivers 157 is located. The second detection signal receiver 157 can also be a photoelectric sensor corresponding to invisible light such as infrared light, ultraviolet light, or laser light, or an ultrasonic receiving unit. It can be understood that the type of the second detection signal receiver 157 is the same as the type of the first detection signal receiver 155.

It can be understood that, if the second detection signal receiver 157 is a photosensor, the contact surface of the P-type semiconductor 1571 and the N-type semiconductor 1573 included in the second detection signal receiver 157 is parallel to the detection signal conducting layer 153, As shown in Figure 4. If the second detection signal receiver 157 is an ultrasonic receiving unit, the structure of the second detection signal receiver 157 can refer to the structure of the first detection signal receiver 155 in the embodiment shown in FIG.

As shown in FIG. 4, in an embodiment, the driving array layer 110 includes a plurality of spaced apart driving transistor arrays 111, and the plurality of second detecting signal receivers 157 are disposed in the driving array layer 110. And located between different drive transistor arrays 111, respectively.

Referring to FIG. 5, in an embodiment, the plurality of second detection signal receivers 157 are disposed between the detection signal conducting layer 153 and the driving array layer 110, and the plurality of second detections. A filling layer 1571 is disposed between the signal receivers 157, and the filling layer 1571 is made of the same material as the first supporting layer 1531.

It can be understood that the second detection signal receiver 157 can also be integrated in the first support layer 1531 or the second support layer 1533 or in the first support layer 1531 and the second support layer 1533 at the same time.

The signal receiving direction of the second detecting signal receiver 157 is different from the signal receiving direction of the first detecting signal receiver 155. In this embodiment, the signal receiving direction of the second detecting signal receiver 157 is perpendicular to the first detecting signal receiver 155. The direction of signal reception.

The number of second detection signal receivers 157 is greater than the number of first detection signal receivers 155. In particular, the bend detection sensor module 1500 includes a plurality of spaced apart second detection signal receivers 157. Each of the second detection signal receivers 157 is different in distance from the detection signal transmitter 151.

By providing the second detection signal receiver 157 at a plurality of different positions, it is possible to receive the detection signal refracted from the respective positions of the detection signal conducting layer 153 when the flexible screen 100 is bent, thereby obtaining more accurate bending detection data. In particular, when the flexible screen 100 is bent in different directions at the same angle, the propagation path of the detection signal refracted by the detection signal conducting layer 153 is different, resulting in the same second detection signal receiver 157 receiving The strength of the detection signal is also different. The bending direction of the flexible screen 100 can also be determined by calculating the intensity of the received detection signal.

Referring to FIG. 6 , in one embodiment, the bend detecting sensor layer 150 is disposed on a side of the light emitting layer 131 opposite to the driving array layer 110 , and the detecting signal conducting layer 150 and the emitting light A first support layer 1531 is disposed between the layers 131. In the embodiment, the first support layer 1531, the detection signal emitter 151, the detection signal conducting layer 153, and the first detection signal receiver 155 are not blocked by the light of the light-emitting layer 131. They are all made of transparent materials.

Referring to FIG. 7 , in an embodiment, the bend detecting sensor layer 150 is disposed in layers with the driving array layer 110 . The driving array layer 110 includes a plurality of spaced apart driving transistor arrays 111 disposed between the driving transistor arrays 111 adjacent to the driving array layer 110. It can be understood that the bending detection sensor module 1500 can be disposed at the edge of the driving array layer 110 in order to reduce the space occupancy of the driving array layer 110 by the bending detection sensor module 1500.

It can be understood that if the flexible screen 100 is in a bent state, the detection signal emitted by the detection signal emitter 151 is reflected and refracted when it is transmitted in the detection signal conducting layer 153. Wherein, after each reflection and refraction of the detection signal, the reflected partial detection signal continues to be transmitted in the detection signal conducting layer 153, and finally transmitted to the first detection signal receiver 155 for reception to excite the The first detection signal receiver generates a first current signal and the refracted partial detection signal is refracted from the detection signal conducting layer 153, and is received by the plurality of second detection signal receivers 157, and generates a plurality of second Current signal.

At the same time, it is also possible to record the angle at which the detection signal transmitter 151 transmits the detection signal and the transmission time, and the reception time and the reception angle at which each of the detection signal receivers receives the detection signal. Further, according to the size of the first current signal and the plurality of second current signals, combined with the emission angle and the emission time of the detection signal, and each of the bending detection sensor modules The positional coordinates of the plurality of detection signal receivers in the 1500, the detection signal reception angle, and the reception time can calculate a curved deformation curve of the position corresponding to each of the bending detection sensor modules 1500. Further, according to the bending deformation curves of the plurality of bending detection sensor modules 1500 and the corresponding positions included in the flexible screen 100, combined with the positions of all the detection signal receivers in the plurality of bending detection sensor modules 1500 The coordinates can be used to iteratively calculate the three-dimensional coordinates of the entire flexible screen 100 in a curved state, thereby realizing the detection of the three-dimensional bending state.

Referring to FIG. 8, in one embodiment of the present invention, a method for detecting a bending state of a flexible screen is provided. The inside of the flexible screen is provided with a bending detecting sensor layer, and the bending detecting sensor layer includes at least one bending detecting sensor module. The bending detection sensor module includes a detection signal transmitter, a detection signal conducting layer and a first detection signal receiver which are sequentially connected, and the bending state detecting method includes:

Step 801: transmitting a detection signal by the detection signal transmitter, and transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer to stimulate the first detection signal receiver to generate First current signal;

Step 803: Determine a bending state of the flexible screen according to a size of the first current signal.

9A, 9B, and 9C, wherein 900 is a flexible screen, 950 is a bending detection sensor layer disposed in the

flexible screen

900, 9500 is a bending detection sensor module, and 951 is a detection signal transmitter. , 953 is a detection signal conducting layer, and 955 is a first detection signal receiver.

As shown in FIG. 9A, in an embodiment, the detection signal transmitter 951 and the first detection signal receiver 955 may be disposed around the flexible screen 900, respectively, and each bending detection sensor module 9500 is provided. The detection signal transmitter 951 is disposed opposite to the first detection signal receiver 955.

Fig. 9B is a cross-sectional view of the flexible screen 900 shown in Fig. 9A in the plane A1-A2 in a planar state. It can be understood that when the flexible screen 900 is in a planar state, the detection signal emitted by the detection signal transmitter 951 is directly transmitted to the first detection signal receiver 955 through the detection signal conducting layer 953, thereby The conduction time and loss of the detection signal are minimal.

Fig. 9C is a cross-sectional view of the flexible screen 900 shown in Fig. 9A in the curved state in the A1-A2 direction. It can be understood that when the flexible screen 900 is in a bent state, the detection signal emitted by the detection signal emitter 951 is transmitted to the first detection signal after a series of reflections in the detection signal conducting layer 953. Receiver 955 receives, at the same time, there will be some detection signals at each reflection It is refracted from the detection signal conducting layer 953, resulting in a large conduction time and loss of the detection signal. Therefore, according to the size of the first current signal generated by the first detection signal receiver 955, the loss of the detection signal during the conduction process can be determined, and the conduction time of the detection signal can be combined to determine the flexible screen 900. Bending state.

Referring to FIG. 10, in an embodiment, the flexible screen further includes a plurality of second detection signal receivers disposed along the detection signal conducting layer, the method further comprising:

Step 1001: Receive, by the plurality of second detection signal receivers, a partial detection signal refracted from the detection signal conducting layer, and generate a plurality of second current signals;

Step 1003: Determine a bending state of the flexible screen at a position where the plurality of second detection signal receivers are located according to the size of the plurality of second current signals.

11A, FIG. 11B and FIG. 11C, wherein 1100 is a flexible screen, 1150 is a bending detection sensor layer disposed in the

flexible screen

1100, 11500 is a bending detection sensor module, and 1151 is a detection signal transmitter. 1153 is a detection signal conducting layer, 1155 is a first detection signal receiver, and 1157 is a second detection signal receiver.

As shown in FIG. 11A, in an embodiment, the detection signal transmitter 1151, the first detection signal receiver 1155, and the second detection signal receiver 1157 may be disposed on the flexible screen 1100 in an array arrangement. The detection signal transmitter 1151 of each of the bending detection sensor modules 11500 is disposed opposite to the first detection signal receiver 1155, and the second detection signal receiver 1157 of the bending detection sensor module 11500 is along the detection. The signal conducting layer 1153 is provided.

Figure 11B is a cross-sectional view of the flexible screen 1100 of Figure 11A in a planar state with a time delay B1-B2. It can be understood that when the flexible screen 1100 is in a planar state, the detection signal emitted by the detection signal transmitter 1151 is directly transmitted to the first detection signal receiver 1155 through the detection signal conducting layer 1153, thereby causing The conduction time and loss of the detection signal are minimal.

Figure 11C is a cross-sectional view of the flexible screen 1100 shown in Figure 11A in the B1-B2 direction in a curved state. It can be understood that when the flexible screen 1100 is in a bent state, the detection signal emitted by the detection signal transmitter 1151 is transmitted to the first detection signal after a series of reflections in the detection signal conducting layer 1153. The device 1155 receives, and at the same time, a partial detection signal is refracted from the detection signal conducting layer 1153 at each reflection, and is received by the second detection signal receiver 1157, thereby causing the conduction time of the detection signal. And the loss is large. Therefore, according to the The magnitude of the first current signal generated by the first detection signal receiver 955 can determine the magnitude of the loss of the detection signal during conduction, and the bending state of the flexible screen 900 can be determined in conjunction with the conduction time of the detection signal. At the same time, the bending state of the flexible screen 1100 at the position of each of the second detection signal receivers 1157 can be determined according to the magnitude of the second current signal generated by each of the second detection signal receivers 1157.

It can be understood that the specific implementation of the steps in the method for detecting the bending state of the flexible screen in this embodiment can also refer to the related description in the embodiment shown in FIG. 1 to FIG. 7 , and details are not described herein again.

Referring to FIG. 12, in an embodiment of the present invention, a capacitor compensation method for a flexible screen is provided, including:

Step 1201: detecting a bending state of the flexible screen by a bending detection sensor layer inside the flexible screen;

Step 1203: Compensating for the capacitance of the flexible screen at the bending position according to the bending state of the flexible screen.

Referring to FIG. 13 , in an embodiment, the compensating the capacitance of the flexible screen at the bending position according to the bending state of the flexible screen comprises:

Step 1301: determining a bending position of the flexible screen and a bending degree at the bending position;

Step 1303: Adjust the driving voltage or current at the bending position according to the degree of bending, and compensate the capacitance to the capacitance with the non-bending position.

In one embodiment, detecting the bending state of the flexible screen by the bending detection sensor layer inside the flexible screen comprises:

The bending detection sensor layer includes at least one bending detection sensor module, and the bending detection sensor module includes a detection signal transmitter, a detection signal conducting layer and a first detection signal receiver, which are sequentially connected, and the detection signal transmitter transmits Detecting a signal and transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer to excite the first detection signal receiver to generate a first current signal, and according to the first The magnitude of the current signal determines the bending state of the flexible screen.

In one embodiment, determining the bending position of the flexible screen and the degree of bending at the bending position include:

Receiving a plurality of second detection signal receivers by spacing along the detection signal conducting layer Detecting a portion of the detection signal refracted by the signal conducting layer and generating a plurality of second current signals;

Determining a bending position and a degree of bending of the flexible screen according to the positions and sizes of the plurality of second current signals.

It can be understood that the specific implementation of each step in the method for compensating the capacitance of the flexible screen in this embodiment can also refer to the related description in the embodiment shown in FIG. 1 to FIG. 11C, and details are not described herein again.

In the case where the functional layer of the flexible screen is the touch layer, when the flexible screen is bent, the touch electrode pattern of the touch layer is stretched or compressed due to bending, and the driving electrode and the sensing electrode in the touch electrode are The distance between them will also change microscopically, resulting in a change in the intrinsic mutual capacitance at the bending position, resulting in poor uniformity of the intrinsic mutual capacitance with other non-bending positions, affecting the touch at the bending position. Sensitivity and accuracy. Therefore, the present invention actively compensates for the intrinsic mutual capacitance of the bending position by detecting the position at which the bending occurs and the degree of bending. For example, the intrinsic mutual capacitance at a certain location is originally 5pf, and when the position is bent, the capacitance becomes 4pf. By detecting the degree of bending of the position, and then according to the corresponding relationship between the degree of bending and the change of the capacitance, the amount of change of the capacitance is calculated, and then the voltage or current of the position is adjusted, thereby compensating the corresponding amount of the capacitance, that is, The 4pf compensation is 5pf.

In the flexible screen according to the embodiment of the present invention, the bending detecting sensor layer is laminated with the functional layer, and the bending detecting sensor layer includes at least one bending detecting sensor module, and the bending detecting sensor module includes a connected detection signal transmitter, a detection signal conducting layer and a first detection signal receiver, and wherein the detection signal transmitter and the first detection signal receiver are respectively located at opposite positions within the flexible screen, when the flexibility When the screen is in a bent state, the detection signal may be transmitted by the detection signal transmitter, and the detection signal is transmitted to the first detection signal receiver by the detection signal conducting layer to trigger the first detection. The signal receiver generates a first current signal, so that the bending state of the flexible screen can be conveniently determined according to the size of the first current signal, and the capacitance of the flexible screen can be compensated according to the bending state of the flexible screen. Thereby improving the touch precision of the flexible screen.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and according to the claims of the present invention. Equivalent changes made are still within the scope of the invention.

Claims

A flexible screen, comprising: an overlapping functional layer and a bending detection sensor layer, the bending detection sensor layer comprising at least one bending detection sensor module, the bending detection sensor module comprising a detection signal transmitter, Detecting a signal conducting layer and a first detecting signal receiver, wherein the detecting signal transmitter and the first detecting signal receiver are disposed at a relative position within the flexible screen, and the detecting signal conducting layer is connected to the detecting signal Between the transmitter and the first detection signal receiver, for transmitting a detection signal transmitted by the detection signal transmitter to the first detection signal receiver for exciting to generate the first detection signal receiver a first current signal, the first current signal being used to determine a bending state of the flexible screen.
The flexible screen according to claim 1, wherein said bending detection sensor module further comprises a plurality of second detection signal receivers spaced apart along said detection signal conducting layer for receiving said detection signal The portion of the detection signal refracted by the conductive layer and generates a plurality of second current signals for determining a bending state of the flexible screen at a position of the plurality of second detection signal receivers.
The flexible screen according to claim 2, wherein the detection signal receiving direction of said second detection signal receiver is different from the detection signal receiving direction of said first detection signal receiver.
The flexible screen according to claim 3, wherein the detection signal receiving direction of said second detection signal receiver is perpendicular to a detection signal receiving direction of said first detection signal receiver.
The flexible screen of claim 2 wherein said second detection signal receiver is in direct contact with said detection signal conducting layer.
The flexible screen according to claim 2, wherein a first supporting layer is disposed between the second detecting signal receiver and the detecting signal conducting layer, and a part of the detecting signal is transmitted through the first supporting layer To the second detection signal receiver.
The flexible screen according to claim 2, wherein the functional layer and the second detection signal receiver are respectively located on opposite sides of the detection signal conducting layer.
The flexible screen according to claim 2, wherein said functional layer and said second detection signal receiver are located on the same side of said detection signal conducting layer.
The flexible screen according to claim 2, wherein the flexible screen further comprises a driving array layer, the functional layer comprises a light emitting layer, and the detection signal conducting layer is disposed on the driving array layer and the light emitting layer between.
The flexible screen according to claim 9, wherein the driving array layer comprises a plurality of spaced apart driving transistor arrays, and the plurality of second detecting signal receivers are disposed in the driving array layer and respectively Located between different drive transistor arrays.
The flexible screen according to claim 9, wherein the plurality of second detection signal receivers are spaced apart between the detection signal conducting layer and the driving array layer, and the plurality of second detection signals A fill layer is provided between the receivers.
The flexible screen according to claim 9, wherein the bend detecting sensor layer is disposed on a side of the light emitting layer opposite to the driving array layer, and the detecting signal conducting layer and the light emitting layer A first support layer is disposed therebetween, and the first support layer, the detection signal emitter, the detection signal conducting layer, and the first detection signal receiver are each made of a transparent material.
The flexible screen according to claim 9, wherein said bending detecting sensor layer is disposed in common with said driving array layer, said driving array layer comprising a plurality of spaced apart driving transistor arrays, said bending detecting sensor The module is disposed between the array of driving transistors adjacent to the driving array layer.
The flexible screen according to any one of claims 2 to 13, wherein the detection signal transmitter is an invisible light emitter, and the first detection signal receiver and the second detection signal receiver are both A photosensor corresponding to the invisible light emitter.
The flexible screen according to any one of claims 1 to 13, wherein the detection signal emitter comprises a first confinement layer, a second confinement layer and an active layer, and the active layer is disposed on the first Between a confinement layer and the second confinement layer, and connected to the detection signal conducting layer, the active layer is configured to emit a detection signal under the driving of the first confinement layer and the second confinement layer And transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer.
The flexible screen according to claim 15, wherein said bend detecting sensing layer comprises a layer of material in a continuous distribution, said portion of said material layer being located between said first confinement layer and said second confinement layer being active a layer, the portion of the material layer outside the first confinement layer and the second confinement layer forming a detection signal conducting layer.
The flexible screen according to claim 15, wherein said first detection signal receiver comprises a P-type semiconductor and an N-type semiconductor, and a contact surface of said P-type semiconductor and said N-type semiconductor is perpendicular to said detection signal conduction Floor.
The flexible screen according to any one of claims 1 to 13, wherein the detection signal transmitter is an ultrasonic transmission unit, and the first detection signal receiver is an ultrasonic reception unit.
The flexible screen according to claim 18, wherein said detection signal emitter comprises a first piezoelectric film and a second piezoelectric film, said first piezoelectric film and said second piezoelectric film being respectively disposed On the opposite sides of the detection signal conducting layer, for generating a detection signal under the driving of a preset voltage, and transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer.
The flexible screen according to claim 19, wherein said first detection signal is received The device includes a third piezoelectric film and a fourth piezoelectric film, and the third piezoelectric film and the fourth piezoelectric film are respectively disposed on opposite sides of the detection signal conducting layer.
The flexible screen according to any one of claims 1 to 13, wherein the detection signal conducting layer is a waveguide layer, and the refractive index of the detecting signal conducting layer is greater than the refractive index of the adjacent other layers.
A bending state detecting method for a flexible screen, characterized in that a flexible detecting sensor layer is disposed inside the flexible screen, the bending detecting sensor layer includes at least one bending detecting sensor module, and the bending detecting sensor module includes sequentially connecting a detection signal transmitter, a detection signal conducting layer and a first detection signal receiver, the detection method comprising:

Transmitting a detection signal by the detection signal transmitter, and transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer to excite the first detection signal receiver to generate a first current signal;

Determining a bending state of the flexible screen according to a size of the first current signal.
The detecting method of claim 22, wherein the flexible screen further comprises a plurality of second detection signal receivers disposed along the detection signal conducting layer, the detecting method further comprising:

Receiving, by the plurality of second detection signal receivers, a partial detection signal refracted from the detection signal conducting layer, and generating a plurality of second current signals;

Determining a bending state of the flexible screen at a position of the plurality of second detection signal receivers according to a size of the plurality of second current signals.
A capacitor compensation method for a flexible screen, comprising:

Detecting a bending state of the flexible screen by a bending detection sensor layer inside the flexible screen;

The capacitance of the flexible screen at the bent position is compensated according to the curved state of the flexible screen.
The method according to claim 24, wherein the compensating the capacitance of the flexible screen at the bending position according to the bending state of the flexible screen comprises:

Determining the bending position of the flexible screen and the degree of bending at the bending position;

The driving voltage or current at the bending position is adjusted according to the degree of bending, and the capacitance is compensated to be equal to the capacitance at the non-bending position.
The method according to claim 25, wherein detecting the bending state of the flexible screen by the inner bending detecting sensor layer of the flexible screen comprises:

The bending detection sensor layer includes at least one bending detection sensor module, and the bending detection sensor module includes a detection signal transmitter, a detection signal conducting layer and a first detection signal receiver, which are sequentially connected, and the detection signal transmitter transmits Detecting a signal and transmitting the detection signal to the first detection signal receiver through the detection signal conducting layer to excite the first detection signal receiver to generate a first current signal, and according to the first The magnitude of the current signal determines the bending state of the flexible screen.
The method of claim 26, wherein determining the bending position of the flexible screen and the degree of bending at the bending position comprises:

Receiving, by the plurality of second detection signal receivers along the detection signal conducting layer interval, a partial detection signal refracted from the detection signal conducting layer, and generating a plurality of second current signals;

Determining a bending position and a degree of bending of the flexible screen according to the positions and sizes of the plurality of second current signals.