CN112002239B

CN112002239B - Display substrate, display device and control method thereof

Info

Publication number: CN112002239B
Application number: CN202010947794.8A
Authority: CN
Inventors: 程旭光; 孟智明; 郭鲁强; 罗婷婷
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2023-02-07
Anticipated expiration: 2040-09-10
Also published as: CN112002239A

Abstract

A display substrate, a display device and a control method thereof are provided, wherein the display substrate is a bendable display substrate, and the display substrate comprises: the display substrate comprises at least one bending detection unit, wherein the bending detection unit comprises an excitation coil and an induction coil, the induction coil and an induction area of the excitation coil are changed along with the change of the bending state of the display substrate, the excitation coil is arranged to receive an excitation signal output by a detection controller to generate an electromagnetic signal, and the induction coil is arranged to receive the electromagnetic signal through electromagnetic induction to generate an induction signal and output the induction signal to the detection controller. According to the scheme provided by the embodiment, the bending state is detected in an induction mode, and compared with a resistance type sensor, the bending state detection device is not influenced by temperature and the like, and the detection error is small.

Description

Display substrate, display device and control method thereof

Technical Field

Embodiments of the present disclosure relate to, but not limited to, display technologies, and more particularly, to a display substrate, a display device and a control method thereof.

Background

With the development of display industry, the Active Matrix Organic Light-Emitting Diode (AMOLED) display technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, extremely high response speed, and the like, and is widely used in the fields of mobile phones, televisions (TVs), and the like.

Folding screen product is released to present smart mobile phone, and folding screen display device disposes the sensor that is used for detecting fold condition usually, and the sensor of using always includes strain resistance formula sensor, and detection error is great.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the application provides a display substrate, a display device and a control method thereof, and bending detection is achieved.

In one aspect, an embodiment of the present application provides a display substrate, the display substrate is a bendable display substrate, the display substrate includes: the bending detection unit comprises an excitation coil and an induction coil, the induction coil and the induction area of the excitation coil are changed along with the change of the bending state of the display substrate, the excitation coil is arranged to receive an excitation signal output by a detection controller to generate an electromagnetic signal, and the induction coil is arranged to receive the electromagnetic signal through electromagnetic induction to generate an induction signal and output the induction signal to the detection controller.

In an exemplary embodiment, the display substrate includes a display area, and the display area includes a bending region, and a first display region and a second display region located at both sides of the bending region.

In an exemplary embodiment, the display substrate includes at least one first bending detection unit, the first bending detection unit includes a first excitation coil and a first induction coil, and the first excitation coil is symmetrical to the bending axis of the bending region; the routing of the first induction coil is symmetrical along the bending axis; the first exciting coil and the first induction coil are respectively positioned on two sides of a central axis of the display substrate and are symmetrical along the central axis, wherein the central axis is perpendicular to the bending axis.

In an exemplary embodiment, the display substrate includes at least one second bending detection unit, the second bending detection unit includes a second excitation coil and a second induction coil, the second excitation coil and the second induction coil are respectively located at two sides of a bending axis of the bending region and are symmetrical along the bending axis, the second excitation coil is located at one side of the display substrate far away from the bending region, and the second induction coil is located at the other side of the display substrate far away from the bending region.

In an exemplary embodiment, the display substrate further includes a plurality of data lines, a plurality of gate lines, a plurality of driving sub-circuits and a plurality of switching sub-circuits, the driving sub-circuits, the switching sub-circuits and the bending detection units are in one-to-one correspondence, for any bending detection unit, one end of an excitation coil of the bending detection unit is connected to an input end of a data line and an input end of a corresponding driving sub-circuit, the other end of the excitation coil is connected to a first end of a corresponding switching sub-circuit, a second end of the corresponding switching sub-circuit is grounded, a third end of the corresponding switching sub-circuit is connected to a gate line, an output end of the corresponding driving sub-circuit is connected to a first end of the corresponding switching sub-circuit, and a data line connected to the excitation coil is connected to the detection controller; the switch sub-circuit is arranged to conduct the first terminal and the second terminal under the control of the grid line; the driving sub-circuit is configured to drive the exciting coil after the first terminal and the second terminal are conducted; wherein, the exciting coils of different bending detection units are connected with different data lines.

In an exemplary embodiment, the driving sub-circuit comprises a diode, an anode of the diode being an input of the driving sub-circuit, and a cathode of the diode being an output of the driving sub-circuit.

In an exemplary embodiment, the switch sub-circuit includes a transistor, a control electrode of the transistor is the third terminal, a first electrode of the transistor is the first terminal, and a second electrode of the transistor is the second terminal.

In an exemplary embodiment, the display substrate includes m gate lines, wherein m-1 gate lines respectively control the sub-pixel rows of the display substrate, and the remaining gate lines are connected to the third terminal of the switch sub-circuit.

In an exemplary embodiment, the display region further includes a plurality of data lines, the data lines are configured to provide data signals to the sub-pixels of the display substrate, and the driving coil, the sensing coil and the data lines are disposed in the same layer.

In an exemplary embodiment, one side of the first display region is provided with a first fan-out area, one side of the second display region is provided with a second fan-out area, the display region includes a plurality of data lines, the data lines of the first display region extend to the first fan-out area, and the data lines of the second display region extend to the second fan-out area; on a plane parallel to the display substrate, the orthographic projection of the first fan-out area is positioned outside the orthographic projection of the bending area and the extending area of the bending area along the bending axis direction, and the orthographic projection of the second fan-out area is positioned outside the orthographic projection of the bending area and the extending area of the bending area along the bending axis direction.

In an exemplary embodiment, the data lines of the bending region extend to the first fan-out region, or the data lines of the bending region extend to the second fan-out region, or a part of the data lines of the bending region extend to the first fan-out region and a part of the data lines extend to the second fan-out region.

In another aspect, an embodiment of the present application provides a display device, including the above display substrate, the display device further includes: detection controller, display controller, wherein:

the detection controller is set to output an excitation signal to the bending detection unit, receive an induction signal output by the bending detection unit, generate a bending state indication signal according to the induction signal and output the bending state indication signal to the display controller;

the display controller is configured to receive the bending state indication signal and control the display state of the display substrate according to the bending state indication signal.

In another aspect, an embodiment of the present application provides a method for controlling a display device, where the method is applied to the display device, and the method includes:

receiving an induction signal of the bending detection unit, and generating a bending state indication signal according to the induction signal;

and controlling the display state of the display substrate according to the bending state indicating signal.

The embodiment of the application comprises a display substrate, the display substrate is a bendable display substrate, the display substrate comprises: the display substrate comprises at least one bending detection unit, wherein the bending detection unit comprises an excitation coil and an induction coil, the induction coil and an induction area of the excitation coil are changed along with the change of the bending state of the display substrate, the excitation coil is arranged to receive an excitation signal output by a detection controller to generate an electromagnetic signal, and the induction coil is arranged to receive the electromagnetic signal through electromagnetic induction to generate an induction signal and output the induction signal to the detection controller. The scheme that this application embodiment provided buckles through the response mode and detects, and it is convenient to realize, detects the precision height.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.

Drawings

The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and are not intended to limit the invention.

FIG. 1 is a schematic view of a display substrate according to an embodiment;

fig. 2 is a schematic view of a bending detection unit according to an embodiment;

FIG. 3 is a schematic diagram of a driving circuit according to an embodiment;

FIG. 4 is a schematic diagram of a switch sub-circuit according to an embodiment;

FIG. 5 is a schematic diagram of a bending detection feedback unit according to an embodiment;

fig. 6 is a flowchart of a control method of a display device according to an embodiment.

Detailed Description

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. In the case of conflict, the embodiments and features of the embodiments may be combined with each other arbitrarily.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here. Unless defined otherwise, technical or scientific terms used herein should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

In the drawings, the size of each component, the thickness of layers, or regions may be exaggerated for clarity. Therefore, the embodiments of the present disclosure are not necessarily limited to the dimensions, and the shapes and sizes of the respective components in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and the embodiments of the present disclosure are not limited to the shapes or numerical values shown in the drawings.

The ordinal numbers such as "first", "second", "third", etc., in this disclosure are provided to avoid confusion among the constituent elements, and do not indicate any order, number, or importance. In the present disclosure, for convenience, terms indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to explain positional relationship of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure. The positional relationship of the components is changed as appropriate in accordance with the direction in which each component is described. Therefore, the words and phrases described in the disclosure are not limited thereto, and can be replaced as appropriate depending on the situation.

In this disclosure, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically stated or limited. For example, it may be a fixed connection, or a detachable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

In the present disclosure, a transistor refers to an element including at least three terminals of a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between a drain electrode (a drain electrode terminal, a drain region, or a drain electrode) and a source electrode (a source electrode terminal, a source region, or a source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. In the present disclosure, a channel region refers to a region through which current mainly flows.

In the present disclosure, the first electrode may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In the case of using transistors of opposite polarities, or in the case of changing the direction of current flow during circuit operation, the functions of the "source electrode" and the "drain electrode" may be interchanged. Therefore, in the present disclosure, "source electrode" and "drain electrode" may be interchanged with each other.

In the present disclosure, "electrically connected" includes a case where constituent elements are connected together by an element having some kind of electrical action. The "element having some kind of electrical function" is not particularly limited as long as it can transmit and receive an electrical signal between connected components. Examples of the "element having some kind of electric function" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.

Fig. 1 is a schematic view of a display substrate according to an embodiment of the present disclosure. As shown in fig. 1, an embodiment of the present application provides a display substrate 100, where the display substrate 100 is a bendable display substrate, and the display substrate 100 may include: at least one bending detection unit 20, the bending detection unit includes an excitation coil 201 and an induction coil 202, the induction coil 202 and an induction area of the excitation coil 201 change with a change of a bending state of the display substrate 100, the excitation coil 201 is configured to receive an excitation signal output by a detection controller 200 to generate an electromagnetic signal, and the induction coil 202 is configured to receive the electromagnetic signal through electromagnetic induction to generate an induction signal and output the induction signal to the detection controller 200. In the display substrate provided in this embodiment, when the display substrate 100 is bent, the sensing areas of the exciting coil 201 and the sensing coil 202 are changed, the output sensing signal is changed, that is, the magnitude of the sensing signal and the bending state have a preset corresponding relationship, and the detection controller 200 may determine the bending state according to the sensing signal, so as to control the display state of the display substrate. According to the scheme provided by the embodiment, the bending state is detected in an induction mode, and compared with a resistance type sensor, the bending state detection device is not influenced by temperature and the like, and the detection error is small.

Fig. 2 is a schematic diagram of an excitation coil and an induction coil according to an embodiment. As shown in fig. 2, the excitation coil 201 or the induction coil 202 includes a plurality of tracks, and two ports P1 and P2. The exciting coil 201 may receive an exciting signal at port P1, the port P2 is grounded, the sensing coil 202 may output a sensing signal at port P1, the port P2 is grounded, and the port P2 may be grounded by means of crossover. The routing manners (shapes and numbers) of the excitation coil 201 and the induction coil 202 may be set as required, which is not limited in the embodiment of the present application. The exciting coil 201 and the induction coil 202 may be disposed at the edge of the display area to reduce the influence on the pixels, but the embodiment of the present application is not limited thereto and may be disposed at other positions.

In an exemplary embodiment, the excitation signal may be a high-frequency signal, and the frequency of the high-frequency signal may be set according to the detection accuracy, or may be obtained through testing, so as to minimize interference with the display signal of the display substrate and improve the detection accuracy as much as possible.

The display substrate 100 is a bendable display substrate, and may be two dual screens implemented by a hinge link scheme, or may be a single screen with a bending region.

In an exemplary embodiment, as shown in fig. 1, the display substrate 100 includes a display area 2, the display area 2 includes a bending region 10, and a first display region 11 and a second display region 12 respectively located at two sides of the bending region 10. When the display substrate 100 is bent, the film layers in the bent region 10 are bent and deformed, and the film layers in the non-bent regions (the first display region 11 and the second display region 12) are not deformed or are deformed less. The folding design is realized through the hinge link scheme to the conventional double screen that adopts, judges the degree of buckling and needs crooked sensor, and this kind of sensor generally adopts graphite alkene material, not only the cost is expensive, occupies very big space moreover, leads to the regional high tension of piling up of flexible folding. In this embodiment, by dividing the panel into the first display region, the second display region, and the bending region, the folding screen that can be realized by combining two screens conventionally is realized depending on the bendable characteristic of the display substrate using the flexible substrate while simplifying the design of the driving circuit. In this embodiment, the substrate of the display substrate may be made of polyimide PI, polyethylene terephthalate PET, or a surface-treated polymer film.

In an exemplary embodiment, as shown in fig. 1, the display substrate 100 includes at least one first bending detection unit 21, the first bending detection unit 21 includes a first excitation coil 211 and a first induction coil 212, and the first excitation coil 211 is symmetrical to the bending axis a of the bending region; the tracks of the first induction coil 212 are symmetrical along the bending axis A; the first exciting coil 211 and the first induction coil 212 are respectively located at two sides of a central axis B of the display substrate 100 and are symmetrical along the central axis B, wherein the central axis B of the display substrate 100 is a central axis of the display substrate B, and in this embodiment, the central axis B is perpendicular to the bending axis a. The display substrate 100 is bent along the bending axis a. When the display substrate 100 is in a flat state, the sensing areas of the first excitation coil 211 and the first sensing coil 212 are the largest, and as the display substrate 100 is bent, the sensing areas of the first excitation coil 211 and the first sensing coil 212 are gradually reduced, and when the display substrate 100 is completely folded, the sensing areas of the first excitation coil 211 and the first sensing coil 212 are the smallest, and accordingly, the sensing signal changes accordingly, so that the bent state of the display substrate 100 can be judged through the sensing signal, and the display state of the display area is further controlled. The routing of the first excitation coil 211 is symmetrical along the bending axis a of the bending region, including that the regions where the routing of the first excitation coil 211 is distributed on both sides of the bending axis a are substantially symmetrical; the first sensing coil 212 is symmetrical along the bending axis a, including that the areas of the first sensing coil 212 distributed at both sides of the bending axis a are substantially symmetrical, and the first exciting coil 211 and the first sensing coil 212 are symmetrical along the central axis B of the display substrate, including: the distribution areas of the first excitation coil 211 and the first induction coil 212 on both sides of the central axis B are substantially symmetrical. In another embodiment, the trace of the first driving coil 211 may not be symmetrical along the bending axis a of the bending region, the trace of the first sensing coil 212 may not be symmetrical along the bending axis a, and the first driving coil 211 and the first sensing coil 212 may not be symmetrical along the central axis B of the display substrate. When the detection units are symmetrically distributed, the detection precision of the bending detection unit can be improved.

The position of the first bending detection unit 21 in fig. 1 is only an example, and the first bending detection unit 21 may be partially located in the first display region 11 and the second display region 12, partially located in the bending region 10, or may be entirely located in the bending region 10. The first bending detection unit 21 may be located near the central axis B, or may be located far from the central axis B, for example, may be located in a non-display area, which facilitates wiring. Certainly, the display substrate 100 may be a full-screen display, in which the frame is narrower, and the first bending detection unit 21 may be partially located in the display area and partially located in the non-display area.

In an exemplary embodiment, there may be a plurality of first bending detection units 21. At this time, the bending state of the display substrate 100 can be comprehensively determined according to the sensing signals of the plurality of first bending detection units 21.

In an exemplary embodiment, the display substrate 100 may include at least one second bending detection unit 22, the second bending detection unit 22 includes a second excitation coil 221 and a second induction coil 222, the second excitation coil 221 and the second induction coil 222 are respectively located at two sides of the bending axis a and are symmetrical along the bending axis a, the second excitation coil 221 is located at one side of the display substrate away from the bending region 10 of the display substrate 100, and the second induction coil 222 is located at the other side of the display substrate 100 away from the bending region 10, that is, the second excitation coil 221 and the second induction coil 222 may be away from the bending region 10 and close to an edge of the display substrate. When the display substrate 100 is in a flat state, the sensing areas of the second excitation coil 221 and the second sensing coil 222 are the smallest, and as the display substrate 100 is bent, the sensing areas of the second excitation coil 221 and the second sensing coil 222 are gradually increased, and when the display substrate 100 is completely folded, the sensing areas of the second excitation coil 221 and the second sensing coil 222 are the largest, and accordingly, the sensing signal output by the second sensing coil 222 changes along with the change of the sensing areas, so that the bending state of the display substrate 100 can be judged through the sensing signal, and the display state of the display area is further controlled.

In another embodiment, the second excitation coil 221 and the second induction coil 222 may be close to the bending region 10. The second driving coil 221 and the second induction coil 222 may be located in the display region, or in the non-display region, or partially in the display region and partially in the non-display region. The second excitation coil 221 and the second induction coil 222 may not be symmetrical with respect to the bending axis a.

In an exemplary embodiment, there may be a plurality of second bend detection units 22. At this time, the bending state of the display substrate 100 can be comprehensively determined according to the sensing signals of the plurality of second bending detection units 22.

In an exemplary embodiment, there may be a first bending detection unit 21 and a second bending detection unit 22, and the first bending state is determined according to the sensing signal of the first bending detection unit 21, the second bending state is determined according to the sensing signal of the second bending detection unit 22, and the final bending state is determined by combining the first bending state and the second bending state, for example, the first bending state is a flat state, the second bending state is a non-flat state, and at this time, the first bending state is a flat state, the second bending state is a flat state, and at this time, the flat state is determined, and so on. According to the scheme provided by the embodiment, the bending detection units of different types can reduce the bending detection error and improve the bending detection accuracy.

In an exemplary embodiment, the bending detection unit may load the excitation signal using the data line of the display substrate 100. Fig. 3 is a schematic diagram of a driving circuit provided in an exemplary embodiment. Fig. 3 is a simplified schematic diagram, and does not show the detailed pixel driving circuit of each sub-pixel. In this embodiment, two bending detection units are disposed in the display substrate for illustration. As shown in fig. 3, the display substrate further includes a plurality of Data lines S1 to Sn, a plurality of Gate lines Gate (1) to Gate (m), a plurality of driving sub-circuits, and a plurality of switching sub-circuits, where the driving sub-circuits, the switching sub-circuits, and the bending detection units are in one-to-one correspondence, in this embodiment, the driving sub-circuit D1 and the switching sub-circuit T1 correspond to one bending detection unit, the driving sub-circuit Dn and the switching sub-circuit Tn correspond to one bending detection unit, the OLEDs (1, 1), the OLEDs (1, 2), and the OLEDs (n, 1), the OLEDs (n, 2) are light emitting units of sub-pixels, and are respectively driven by Data signals output by the Data lines S1 and Sn, and Data signals input by the Data signal terminals Data (1) and Data (n) are respectively output to the Data lines S1 and Sn after passing through the Data driver, so as to provide Data signals for the sub-pixels of the display substrate. The structure of the data driver is not limited in the embodiments of the present application, and a conventional data driver interface is used. In this embodiment, in addition to controlling the gate lines of the sub-pixel columns, a gate line may be added to control the bending detection unit 20. As shown in fig. 3, one end 1 \ u p1 of the excitation coil of one bending detection unit is connected to the Data line S1, the other end 1 \ u p2 is connected to the first end K11 of the switch sub-circuit T1, the second end K12 of the switch sub-circuit T1 is grounded, the third end K13 of the switch sub-circuit T1 is connected to the Gate line Gate (m), the Data line S1 is connected to the input end of the driving sub-circuit D1, the output end of the driving sub-circuit D1 is connected to the first end K11 of the switch sub-circuit T1, the Data signal end Data (1) is connected to the detection controller 200, and the excitation signal output by the detection controller 200 is output to the excitation coil through the Data line S1; the switch sub-circuit T1 is configured to turn on the first terminal K11 and the second terminal K12 under the control of the Gate line Gate (m), and the driving sub-circuit D1 is configured to load an excitation signal to the excitation coil after the first terminal K1 and the second terminal K2 are turned on. One end 2_P1 of the exciting coil of the other bending detection unit is connected with a Data line Sn, the other end 2 _P2is connected with a first end Kn1 of a switch sub circuit Tn, a second end Kn2 of the switch sub circuit Tn is grounded, a third end Kn3 of the switch sub circuit Tn is connected with a grid line Gate (m), the Data line Sn is connected with an input end of a driving sub circuit Dn, an output end of the driving sub circuit Dn is connected with the first end K1 of the switch sub circuit Tn, a Data signal end Data (n) is connected with the detection controller 200, an exciting signal output by the detection controller 200 reaches the bending detection unit through the Data line Sn, and different bending detection units can be connected with the same Data line or different Data lines; the switch sub-circuit Tn is configured to conduct the first terminal Kn1 and the second terminal Kn2 under the control of the Gate line Gate (m). The driving sub-circuit Dn is configured to apply an excitation signal to the excitation coil after the first terminal Kn1 and the second terminal Kn2 are turned on. In this embodiment, after the first terminal and the second terminal are conducted under the control of the Gate line Gate (m), the excitation signal reaches the excitation coil to generate an electromagnetic signal, that is, the bending detection can be started or stopped by the scanning signal output by the Gate line Gate (m). In m grid lines of the display substrate, m-1 grid lines control a sub-pixel row, each grid line controls a row of sub-pixels, and the rest grid lines control a bending detection unit. That is, in this embodiment, a Gate line Gate (m) is added to control the bending detection unit, so that the Gate line can be added in the detection region. The detection zone may be located outside the display area. The sensing signal output from the sensing coil may be output to a Flexible Printed Circuit (FPC) through a wire and then to the detection controller 200. The scheme provided by the embodiment has small process change, can be used for increasing the driving circuit and the grid line for controlling the bending detection unit when the pixel driving circuit and the grid driving circuit are prepared, does not need additional working procedures and reduces the cost. The driving scheme provided in this embodiment is only an example, and the embodiment of the present application is not limited thereto, and other ways may be used to drive the bending detection unit, for example, other routing control bending detection units are used instead of the gate lines. .

Fig. 3 illustrates only two bending detection units as an example. If there are multiple bending detection units, the connection method is similar, and will not be described again.

In an exemplary embodiment, as shown in fig. 4, the driving sub-circuit may comprise a diode, an anode of the diode being an input terminal of the driving sub-circuit, and a cathode of the diode being an output terminal of the driving sub-circuit. The implementation of the switch sub-circuit is only an example, and the embodiment of the present application does not limit this, and the function of the driving sub-circuit can be implemented.

In an exemplary embodiment, as shown in fig. 4, the switch sub-circuit is, for example, a transistor, the first terminal (K11, kn 1) is a first pole of the transistor, the second terminal (K12, kn 2) is a second pole of the transistor, and the third terminal (K13, kn 3) is a control pole of the transistor. The implementation of the switch sub-circuit is only an example, and the embodiment of the present application is not limited thereto, and the function of the switch sub-circuit may be implemented.

In an exemplary embodiment, the display region further includes a plurality of data lines, the data lines are configured to provide data signals to the sub-pixels of the display substrate, and the excitation coil, the induction coil and the data lines are disposed in the same layer. In an exemplary embodiment, the display substrate may include a substrate, a driving structure layer, and a light emitting structure layer in a direction perpendicular to the display substrate, and the driving structure layer may include an active layer, a first insulating layer, a first gate electrode (disposed on the same layer including a gate line), a second insulating layer, and a source/drain electrode layer (disposed on the same layer including a data line) which are sequentially disposed. In this embodiment, the excitation coil and the induction coil may be disposed on the source/drain electrode layer, that is, the excitation coil and the induction coil may be disposed on the same layer as the source electrode and the drain electrode, so that the preparation process may be simplified, and the preparation efficiency may be improved. The excitation coil and the induction coil may use the same material as the source electrode and the drain electrode, such as any one or more of silver (Ag), copper (Cu), aluminum (Al), and molybdenum (Mo), or an alloy material of the above metals, such as aluminum neodymium alloy (AlNd) or molybdenum niobium alloy (MoNb). The positions of the exciting coil and the induction coil are not limited to the source and drain electrode layers, and can be arranged on other film layers. The structure of the driving structure layer is only an example, and the embodiment of the present application does not limit this.

In an exemplary embodiment, as shown in fig. 1, a first fan-out area 31 is disposed on one side of the first display area 11, a second fan-out area 32 is disposed on one side of the second display area 12, the display area 2 includes a plurality of data lines (not shown), the data lines of the first display area 11 extend to the first fan-out area 31, the data lines of the second display area 12 extend to the second fan-out area 32, an orthogonal projection of the first fan-out area 31 is located outside an orthogonal projection of the bending area 10 and an extension area of the bending area 10 along a bending axis direction (e.g., an area between A1 and A2 in fig. 1) on a plane parallel to the display substrate 100, an orthogonal projection of the second fan-out area 32 is located outside an orthogonal projection of the bending area and an extension area of the bending area along the bending axis direction, and the data lines are connected to the flexible circuit board 400 through the first fan-out area 31 and the second fan-out area 32, and connected to the display controller 300 and the inspection controller 300. Compared with the scheme of only arranging one fan-out area, the scheme provided by the embodiment has the advantages that the data lines are scattered at two ends, and are prevented from being concentrated in the bending area 10, so that the bending effect is influenced; in addition, the data lines are concentrated in the bending region 10, and are easily broken due to excessive bending, which affects the service life of the device.

In an exemplary embodiment, the data lines of the bending region 10 extend to the first fan-out area 31, or the data lines of the bending region 10 extend to the second fan-out area 32, or a part of the data lines of the bending region 10 extend to the first fan-out area 31 and a part of the data lines extend to the second fan-out area 32. That is, the data lines of the bending region 10 are also connected to the flexible circuit board 400 through the first fan-out region 31 and the second fan-out region 32, so as to avoid affecting the bending effect. In another embodiment, a third fan-out region may be disposed at one side of the bending region 10, and the data lines of the bending region 10 are led out to the flexible circuit board 400 through the third fan-out region.

In an exemplary embodiment, the first fan-out area 31 may be disposed as a plurality of sub fan-out areas, and the data lines of the first display region 11 extend to different sub fan-out areas, respectively. The second fan-out section 32, similarly, may be arranged as a plurality of sub-fan-out sections.

An embodiment of the present application provides a display device, as shown in fig. 1, including a display substrate 100, further including: a detection controller 200, a display controller 300, a bending detection unit 20 connected to the detection controller 200, the detection controller connected to the display controller 300, and a display substrate 100 connected to the display controller 300, wherein:

the detection controller 200 is configured to output an excitation signal to the bending detection unit 20, receive an induction signal output by the bending detection unit 20, generate a bending state indication signal according to the induction signal, and output the bending state indication signal to the display controller 300;

the display controller 300 is configured to receive the bending state indication signal and control the display state of the display substrate 100 according to the bending state indication signal.

The display device provided by the embodiment detects the bending state in an induction mode, is not influenced by temperature and the like, and is high in detection precision and small in error.

In an exemplary embodiment, the connection between the sensing controller 200, the display controller 300, and the display substrate 100 may be implemented by the flexible circuit board 400. The bending detection unit 20 is electrically connected to the detection controller 200 through the flexible circuit board 400, the detection controller 200 is electrically connected to the display controller 300 through the flexible circuit board 400, and the display controller 300 is electrically connected to the display substrate 100 through the flexible circuit board 400.

In an exemplary embodiment, the receiving of the bending state indication signal by the display controller 300, and the controlling of the display state of the display substrate 100 according to the bending state indication signal may include:

when the bending state indicating signal indicates that the display substrate 100 is in a flat state (without bending), controlling the first display area 11, the second display area 12 and the bending area 10 to display; the display area can be displayed as a whole, or split-screen display can be performed, and the like;

when the bending state indicating signal indicates that the display substrate 100 is in a folded state (completely bent), controlling the first display area 11 to display, and controlling the second display area 12 and the bending area 10 to be in a breath screen state, or displaying a black picture;

when the bending state indication signal indicates that the display substrate 100 is at a predetermined bending angle (for example, an included angle between the first display area and the second display area is 150 degrees), the first display area 11 and the second display area 12 are respectively used as independent display interfaces to perform display, and so on.

The setting of the display state is only an example, and other display states may be set as needed, which is not limited in the embodiment of the present application.

In an exemplary embodiment, the detection controller 200 includes a bending detection feedback unit, which may include one or more bending detection feedback units, and each bending detection feedback unit processes a sensing signal of one bending detection unit. Fig. 5 is a schematic diagram of a bending detection feedback unit according to an embodiment. As shown in fig. 5, the bending detection feedback unit includes: first electric capacity C1, second electric capacity C2, third electric capacity C3, fourth electric capacity C4, first resistance R1, second resistance R2, voltage comparator 50, wherein:

the first capacitor C1 and the fourth capacitor C4 are connected in parallel and then connected between an input end Vtest and a ground end; the input end Vtest is connected to a positive input end V + of the voltage comparator 50 through a second resistor R2, a negative input end V-of the voltage comparator 50 is connected to a reference signal end Vref, the second capacitor C2 and the third capacitor C3 are connected between the negative input end V-and a ground end after being connected in parallel, a first resistor R1 is connected between an output end Vout of the voltage comparator and the input end Vtest, the sensing signal is input through the input end Vtest, and the output end Vout outputs a bending state signal generated according to the sensing signal. The voltage comparator 50 outputs a high level or a low level through the output terminal Vout according to the relative magnitude of the positive input terminal V + and the negative input terminal V-, and the reference signal terminal Vref inputs the reference voltage Vref. The detection controller 200 determines and outputs the bending state indication signal according to the output signals of the bending detection feedback units.

In an exemplary embodiment, the first resistor R1 is, for example, 4.7K ohms, the second resistor R2 is, for example, a zero ohm resistor (preventing signal jitter), the first capacitor C1 and the second capacitor C2 are, for example, 10 microfarads (uF), the third capacitor C3 and the fourth capacitor C4 are, for example, 0.1uF, and the voltage comparator 50 is, for example, the comparator LM339. The embodiments of the present application are not limited to this, and may be elements of other parameters.

In the embodiment of the present Application, the detection controller 200 may be a Processor in a display device, and the Processor may be a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or any combination of other programmable logic devices, transistor logic devices, and hardware components. Combinations of computing functions can be included, for example, including one or more microprocessor combinations, combinations of DSPs and microprocessors, and the like.

The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

Fig. 6 is a flowchart of a control method of a display device according to an embodiment of the present application. As shown in fig. 6, an embodiment of the present application provides a control method for a display device, which is applied to the display device and includes:

601, receiving an induction signal of the bending detection unit, and generating a bending state indication signal according to the induction signal;

step 602, controlling the display state of the display substrate according to the bending state indication signal.

In an exemplary embodiment, in step 601, the sensing signals of the bending detection units are received, which may be sensing signals of a plurality of bending detection units. The size of the induction signal and the bending state have a preset relation, so that the bending state can be determined through the induction signal, the bending state can be determined through a plurality of induction signals, and the detection accuracy can be improved.

In an exemplary embodiment, the controlling the display state of the display substrate according to the bending state indicating signal in step 602 may include:

when the bending state indicating signal indicates that the current state is a flat state (no bending), controlling the first display area 11, the second display area 12 and the bending area 10 to display; the display can be carried out as a whole, or the display can be carried out in a split screen mode;

when the bending state indicating signal indicates that the current state is a double-folding state (completely bent), the first display area 11 is controlled to display, and the second display area 12 and the bending area 10 are turned off, so that the power consumption can be reduced.

The display states described above are merely examples, and other display states may be set as needed, which is not limited in the embodiments of the present application.

The control method of the display device provided by the embodiment can detect the bending state of the screen, further control the display state according to the bending state, realize bending detection and display control, and perform bending detection in an induction mode, so that the detection error is small.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A display substrate, wherein the display substrate is a bendable display substrate, the display substrate comprising: the bending detection unit comprises an excitation coil and an induction coil, the induction coil and the induction area of the excitation coil change along with the change of the bending state of the display substrate, the excitation coil is arranged to receive an excitation signal output by a detection controller to generate an electromagnetic signal, and the induction coil is arranged to receive the electromagnetic signal through electromagnetic induction to generate an induction signal and output the induction signal to the detection controller;

the display substrate comprises a display area, wherein the display area comprises a bending area, a first display area and a second display area, and the first display area and the second display area are positioned on two sides of the bending area;

the display substrate includes: at least one first bending detection unit and at least one second bending detection unit; the first bending detection unit comprises a first excitation coil and a first induction coil, and the routing of the first excitation coil is symmetrical along the bending axis of the bending area; the routing of the first induction coil is symmetrical along the bending axis; the first exciting coil and the first induction coil are respectively positioned on two sides of a central axis of the display substrate and are symmetrical along the central axis, wherein the central axis is perpendicular to the bending axis;

the second bending detection unit comprises a second excitation coil and a second induction coil, the second excitation coil and the second induction coil are respectively positioned on two sides of the bending axis of the bending area and are symmetrical along the bending axis, the second excitation coil is positioned on one side of the display substrate far away from the bending area, and the second induction coil is positioned on the other side of the display substrate far away from the bending area;

the display substrate further comprises a plurality of data lines, a plurality of grid lines, a plurality of driving sub-circuits and a plurality of switch sub-circuits, wherein the driving sub-circuits and the switch sub-circuits correspond to the bending detection units one by one, for any bending detection unit, one end of an exciting coil of the bending detection unit is connected with one data line and the input end of the corresponding driving sub-circuit, the other end of the exciting coil of the bending detection unit is connected with the first end of the corresponding switch sub-circuit, the second end of the corresponding switch sub-circuit is grounded, the third end of the corresponding switch sub-circuit is connected with one grid line, the output end of the corresponding driving sub-circuit is connected with the first end of the corresponding switch sub-circuit, and the data line connected with the exciting coil is connected to the detection controller; the switch sub-circuit is arranged to conduct the first terminal and the second terminal under the control of the grid line; the driving sub-circuit is configured to load an excitation signal to the excitation coil after the first terminal and the second terminal are conducted; and excitation coils of different bending detection units are connected with different data lines, and the excitation signals are high-frequency signals.

2. A display substrate according to claim 1, wherein the driving sub-circuit comprises a diode, an anode of the diode being an input of the driving sub-circuit, and a cathode of the diode being an output of the driving sub-circuit.

3. The display substrate of claim 1, wherein the switch sub-circuit comprises a transistor, a gate of the transistor is the third terminal, a first terminal of the transistor is the first terminal, and a second terminal of the transistor is the second terminal.

4. The display substrate of claim 1, wherein the display substrate comprises m gate lines, wherein m-1 gate lines respectively control the rows of sub-pixels of the display substrate, and the remaining gate lines are connected to the third terminal of the switch sub-circuit.

5. The display substrate of any one of claims 1 to 4, wherein the display region further comprises a plurality of data lines, the data lines are configured to provide data signals to the sub-pixels of the display substrate, and the excitation coil, the induction coil and the data lines are disposed in the same layer.

6. The display substrate of claim 1, wherein one side of the first display region is provided with a first fan-out area, one side of the second display region is provided with a second fan-out area, the display region comprises a plurality of data lines, the data lines of the first display region extend to the first fan-out area, and the data lines of the second display region extend to the second fan-out area; on a plane parallel to the display substrate, the orthographic projection of the first fan-out area is positioned outside the orthographic projection of the bending area and the extending area of the bending area along the bending axis direction, and the orthographic projection of the second fan-out area is positioned outside the orthographic projection of the bending area and the extending area of the bending area along the bending axis direction.

7. The display substrate of claim 6, wherein the data lines of the bending region extend to the first fan-out area, or the data lines of the bending region extend to the second fan-out area, or a part of the data lines of the bending region extend to the first fan-out area and a part of the data lines extend to the second fan-out area.

8. A display device comprising the display substrate according to any one of claims 1 to 7, the display device further comprising: detection controller, display controller, wherein:

9. A control method of a display device applied to the display device according to claim 8, comprising: