CN114613819A - Display panel, display device and preparation method of display panel - Google Patents

Abstract

The invention provides a display panel, a display device and a preparation method of the display panel, wherein the display panel comprises a flexible substrate and a cathode layer arranged above the flexible substrate, the flexible substrate is provided with a bending direction, the cathode layer is provided with a plurality of grooves, and the grooves extend along the longitudinal direction vertical to the bending direction.

Description

Display panel, display device and preparation method of display panel

Technical Field

The present invention generally relates to the field of display technologies, and in particular, to a display panel, a display device, and a method for manufacturing the display panel.

Background

Compared with a Liquid Crystal Display (LCD), an Organic Light Emitting Diode (OLED) Display device has the advantages of being thin, Light, wide in viewing angle, active in Light Emitting, continuously adjustable in Light Emitting color, low in cost, high in response speed, small in energy consumption, low in driving voltage, wide in working temperature range, simple in production process, high in Light Emitting efficiency, flexible in bending and the like.

However, when the flexible organic light emitting display device is flexibly bent, how to ensure the stability between the inner film layers is a problem to be solved at present.

Disclosure of Invention

In order to solve the above problems or other problems, the present invention provides the following technical solutions.

In a first aspect, the present invention provides a display panel comprising:

a flexible substrate having a bending direction; and the number of the first and second groups,

the cathode layer is arranged above the flexible substrate and is provided with a plurality of grooves, and the grooves extend in the longitudinal direction perpendicular to the bending direction.

According to an embodiment of the invention, the display panel has a stacking direction perpendicular to the flexible substrate, the groove extends in the cathode layer along the stacking direction, or the groove penetrates the cathode layer along the stacking direction.

The display panel according to an embodiment of the present invention, wherein the display panel further includes a pixel layer disposed between the flexible substrate and the cathode layer, the pixel layer has a plurality of organic light emitting units and a plurality of pixel defining units, the plurality of organic light emitting units are arranged at intervals, and each pixel defining unit is disposed between adjacent organic light emitting units, wherein:

the groove is positioned above the projection of the pixel limiting unit; and/or the presence of a gas in the gas,

the groove is located above the projection of the organic light emitting unit.

According to an embodiment of the present invention, the cathode layer continuously covers the pixel layer.

According to an embodiment of the present invention, the cathode layer includes a first cathode structure and a second cathode structure, wherein:

the first cathode structure covers a plurality of the organic light emitting units;

the second cathode structure covers a plurality of the pixel defining units;

and wherein the first cathode structure has a first thickness and the second cathode structure has a second thickness, the first thickness being less than the second thickness.

According to an embodiment of the present invention, the area of the first cathode structure above the projection of each organic light emitting unit is equal.

According to an embodiment of the present invention, a gap is formed between the first cathode structure and the second cathode structure.

According to an embodiment of the present invention, the first cathode structure has a first surface far from the organic light emitting unit, and the second cathode structure has a second surface near the pixel defining unit, wherein the first surface and the second surface are located on the same horizontal plane.

In a second aspect, the invention provides a display device comprising a display panel as described in any one of the above.

In a third aspect, the present invention provides a method for manufacturing a display panel, including:

providing a flexible substrate, wherein the flexible substrate is provided with a bending direction;

forming a cathode layer over the flexible substrate; and the combination of (a) and (b),

and etching the cathode layer to form a plurality of grooves, wherein the grooves extend along a longitudinal direction perpendicular to the bending direction.

The beneficial effects of the invention are as follows: the invention provides a display panel, a display device and a preparation method of the display panel, wherein the display panel comprises a flexible substrate and a cathode layer arranged above the flexible substrate, the flexible substrate is provided with a bending direction, the cathode layer is provided with a plurality of grooves, and the grooves extend along the longitudinal direction vertical to the bending direction.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments according to the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.

Fig. 2 is a detailed structural diagram of a display panel according to a first embodiment of the present invention.

Fig. 3 is a schematic flow chart of a method for manufacturing a display panel according to a first embodiment of the invention.

Fig. 4 is a schematic structural diagram of a display panel according to a second embodiment of the present invention.

Fig. 5 is a schematic top view of a display panel according to a second embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Fig. 8 is a detailed structural diagram of a mobile terminal according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel 100 according to a first embodiment of the present invention, in which components and relative positions of the components can be visually seen.

As shown in fig. 1, the display panel 100 includes a flexible substrate 110 and a cathode layer 120 disposed above the flexible substrate 110, wherein the flexible substrate 110 has a bending direction X, the cathode layer 120 has a plurality of grooves 121, and the grooves 121 extend along a longitudinal direction Y perpendicular to the bending direction X.

It should be noted that, after the flexible display panel is bent for multiple times, peeling between the functional film layers and fracture in the functional film layers are likely to occur, specifically, peeling between the functional film layers mainly occurs between the film layers with poor viscosity, such as between the thin film encapsulation layer, the cathode layer and the light emitting layer, and fracture in the functional film layers mainly occurs in the rigid film layers, such as the cathode layer. In the process of bending the flexible display panel, the adhesion among the transparent Adhesive (OCA) layer, the thin film encapsulation layer, and the cathode layer is greater than the adhesion between the cathode layer and the light emitting layer, and the bending resistance of the rigid film layer is poor, so that the problems of peeling between the cathode layer and the light emitting layer, breaking of the cathode layer, and the like may occur.

In one embodiment, the stress generated when the flexible display panel is bent is relieved by filling an elastic material between the film layers adjacent to the cathode layer, but this increases the process flow for manufacturing the flexible display panel and increases the process cost.

However, in the display panel 100 according to the present embodiment of the invention, since the plurality of grooves 121 extending in the longitudinal direction Y perpendicular to the bending direction X are disposed on the cathode layer 120, so that the cathode layer 120 on both sides of the grooves 121 is broken by the grooves 121, when the display panel 100 is bent in the bending direction X, the stress generated inside the display panel 100 is reduced, thereby improving the stability and the lifetime of the display panel 100.

Referring to fig. 1, in the present embodiment, as shown in fig. 1, the display panel 100 has a stacking direction Z perpendicular to the flexible substrate 110, and the groove 121 extends in the cathode layer 120 along the stacking direction Z. It is noted that in other embodiments according to the invention, the grooves may also extend through the cathode layer in the above-mentioned stacking direction.

Further, referring to fig. 2, fig. 2 is a schematic detail view of a display panel 100 according to a first embodiment of the present invention.

As shown in fig. 2, the display panel 100 further includes a pixel layer 130 disposed between the flexible substrate 110 and the cathode layer 120, the pixel layer 130 has a plurality of organic light emitting units 131 and a plurality of pixel defining units 132, the plurality of organic light emitting units 131 are arranged at intervals, and each pixel defining unit 132 is disposed between adjacent organic light emitting units 131, in this embodiment, a single groove 121 is only located above the projection of the organic light emitting unit 131, and no groove 121 is disposed above the projection of the pixel defining unit 132.

In other embodiments according to the present invention, the single groove may be only located above the projection of the pixel defining unit and not provided above the projection of the organic light emitting unit, or the single groove may be located above the projections of the organic light emitting unit and the pixel defining unit, or the single groove may be only located above the projection of any one of the organic light emitting unit and the pixel defining unit and provided above the projections of the organic light emitting unit and the pixel defining unit.

Referring to fig. 2, as shown in fig. 2, in the present embodiment, the cathode layer 120 continuously covers the pixel layer 130, and specifically, in the present embodiment, the cathode layer 120 is formed in one process.

Further, each organic light emitting unit 131 may specifically include: a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer. Specifically, the single organic light emitting unit 131 may emit light of any one color of red, green, and blue.

Further, in the display panel 100 provided in the present embodiment shown in fig. 2, the organic light emitting unit 131 and the pixel defining unit 132 have the same height, and it should be noted that the present invention is not intended to limit the heights of the organic light emitting unit 131 and the pixel defining unit 132, and in other embodiments according to the present invention, the height of the pixel defining unit may be higher than the height of the organic light emitting unit.

Further, as shown in fig. 2, in the present embodiment, the display panel 100 further includes an anode layer 140 disposed between the flexible substrate 110 and the pixel layer 130, and when the display panel 100 performs a light emitting display, the anode layer 140 is electrically connected to the cathode layer 120 through the organic light emitting units 131 in the pixel layer 130, and the light emitting layers in the organic light emitting units 131 emit light of corresponding colors.

Further, referring to fig. 3, fig. 3 is a schematic flow chart of a manufacturing method of the display panel 100 according to a first embodiment of the invention, and as shown in fig. 1 and fig. 3, the manufacturing method of the display panel 100 specifically includes the following steps:

providing step S101: providing a flexible substrate 110, wherein the flexible substrate 110 has a bending direction X;

a cathode layer formation step S102: forming a cathode layer 120 over the flexible substrate 110; and the combination of (a) and (b),

groove forming step S103: the cathode layer 120 is etched to form a plurality of grooves 121, wherein the grooves 121 extend in a longitudinal direction Y perpendicular to the bending direction X.

According to the foregoing embodiments, the first embodiment of the present invention provides a display panel 100, where the display panel 100 includes a flexible substrate 110 and a cathode layer 120 disposed above the flexible substrate 110, where the flexible substrate 110 has a bending direction X, the cathode layer 120 has a plurality of grooves 121, and the grooves 121 extend along a longitudinal direction Y perpendicular to the bending direction X, and by disposing the plurality of grooves 121 on the cathode layer 120, the display panel 100 according to the first embodiment of the present invention can relieve stress generated when the display panel 100 is bent along the bending direction X, thereby improving stability and lifespan of the display panel 100.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a display panel 200 according to a second embodiment of the present invention, fig. 5 is a schematic structural diagram of a top view of the display panel 200 according to the second embodiment of the present invention, and the components and the relative positions of the components according to the second embodiment of the present invention can be seen from the diagram.

As shown in fig. 4, the second embodiment has substantially the same structure as the first embodiment, wherein the flexible substrate 210 in the second embodiment has the same function and arrangement position as the flexible substrate 110 in the first embodiment; the cathode layer 220 (with grooves 221) in the second embodiment has the same function and arrangement position as the cathode layer 120 (with grooves 121) in the first embodiment; the pixel layer 230 (having the plurality of organic light emitting units 231 and the plurality of pixel defining units 232) in the second embodiment has the same function and arrangement position as the pixel layer 130 (having the plurality of organic light emitting units 131 and the plurality of pixel defining units 132) in the first embodiment; the anode layer 240 in the second embodiment functions and is disposed at the same position as the anode layer 140 in the first embodiment.

The difference from the first embodiment described above is that, in the present embodiment, the cathode layer 220 includes a first cathode structure 2201 and a second cathode structure 2202, wherein the first cathode structure 2201 covers the plurality of organic light emitting units 231 and the second cathode structure 2202 covers the plurality of pixel defining units 232.

Further, with reference to fig. 4 and fig. 5, as shown in fig. 4 and fig. 5, in the present embodiment, the groove 221 is opened on the first cathode structure 2201 and penetrates through the first cathode structure 2201 to expose the organic light emitting units 231 below, and further, the area of the first cathode structure 2201 above the projection of each organic light emitting unit 231 is equal to ensure that the light emitting effect of each organic light emitting unit 231 is the same.

It should be noted that, in the present embodiment, the first cathode structure 2201 and the second cathode structure 2202 are formed in two processes, respectively, and therefore, a gap (not shown) exists between the first cathode structure 2201 and the second cathode structure 2202, so that the stress generated when the display panel 200 is bent along the bending direction X can be resisted to a certain degree. Further, in other embodiments according to the present invention, there may be no gap between the first cathode structure and the second cathode structure, or the first cathode structure and the second cathode structure with the gap may be formed in a single process, so as to save the process cost.

Further, in the display panel 200 provided in the present embodiment shown in fig. 4, the first cathode structure 2201 has a first thickness, and the second cathode structure 2202 has a second thickness, where the first thickness is equal to the second thickness. It should be noted that in other embodiments according to the present invention, the first thickness may be smaller than the second thickness, so as to reduce the lateral voltage drop of the cathode layer.

Further, in the display panel 200 provided in the present embodiment shown in fig. 4, the second cathode structure 2202 located above the projection of the pixel defining unit 232 is not provided with a groove. It should be noted that, in other embodiments according to the present invention, a groove may be disposed on the second cathode structure located above the projection of the pixel defining unit to further relieve stress generated when the display panel is bent along the bending direction, where the groove may extend in the second cathode structure along the stacking direction, or may penetrate through the second cathode structure along the stacking direction.

Further, with reference to fig. 4, as shown in fig. 4, the first cathode structure 2201 has a first surface (not shown) far away from the organic light emitting unit 231, and the second cathode structure 2202 has a second surface (not shown) close to the pixel defining unit 232, wherein the first surface and the second surface are located on the same horizontal plane, which can further relieve the stress generated when the display panel is bent along the bending direction.

According to the foregoing embodiment, the second embodiment of the present invention provides a display panel 200, where the display panel 200 includes a flexible substrate 210 and a cathode layer 220 disposed above the flexible substrate 210, where the flexible substrate 210 has a bending direction X, the cathode layer 220 has a plurality of grooves 221, and the grooves 221 extend along a longitudinal direction Y perpendicular to the bending direction X, and by disposing the plurality of grooves 221 on the cathode layer 220, the display panel 200 according to the second embodiment of the present invention can relieve stress generated when the display panel 200 is bent along the bending direction X, thereby improving stability and lifespan of the display panel 200.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a display device 300 according to an embodiment of the present invention, in which components and relative positions of the components can be visually seen.

As shown in fig. 6, the display device 300 includes a display panel 310, wherein the display panel 310 may include the display panel 100 in the first embodiment as described above or the display panel 200 in the second embodiment as described above.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a mobile terminal 400 according to an embodiment of the present invention, the display device 300 is applied to the mobile terminal 400, the mobile terminal 400 may be a smart phone or a tablet computer, and the components of the present invention and the relative position relationship of the components can be visually seen from the figure.

As shown in fig. 7, the mobile terminal 400 includes a processor 401, a memory 402. The processor 401 is electrically connected to the memory 402.

The processor 401 is a control center of the mobile terminal 400, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or loading an application program stored in the memory 402 and calling data stored in the memory 402, thereby integrally monitoring the mobile terminal.

Referring to fig. 8, fig. 8 is a detailed structure diagram of a mobile terminal 400 according to an embodiment of the present invention, where the mobile terminal 400 may be a smart phone or a tablet computer, and components and relative positions of the components of the present invention can be seen from the diagram.

Fig. 8 is a block diagram illustrating a specific structure of the mobile terminal 100 according to an embodiment of the present invention. As shown in fig. 8, the mobile terminal 400 may include Radio Frequency (RF) circuitry 410, memory 420 including one or more computer-readable storage media, an input unit 430, a display unit 440, a sensor 450, audio circuitry 460, a transmission module 470 (e.g., Wireless Fidelity (WiFi), a Wireless Fidelity (wi-fi)), a processor 480 including one or more processing cores, and a power supply 490. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 8 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The RF circuit 410 is used for receiving and transmitting electromagnetic waves, and implementing interconversion between the electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. RF circuitry 410 may include various existing circuit components for performing these functions, such as antennas, radio frequency transceivers, digital signal processors, encryption/decryption chips, Subscriber Identity Module (SIM) cards, memory, and so forth. The RF circuit 410 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols, and technologies, including, but not limited to, Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (e.g., Institute of Electrical and Electronics Engineers (IEEE) standard IEEE802.11 a, IEEE802.11 b, IEEE802.11g, and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), world wide mail Access (Microwave Access for micro), wimax-1, other suitable short message protocols, and any other suitable Protocol for instant messaging, and may even include those protocols that have not yet been developed.

The memory 420 may be configured to store software programs and modules, such as program instructions corresponding to the audio power amplifier control method, and the processor 480 executes various functional applications and data processing by operating the software programs and modules stored in the memory 420, that is, obtains the frequency of the information transmission signal transmitted by the mobile terminal 400. Generating interference signals, and the like. The memory 420 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 420 may further include memory located remotely from the processor 480, which may be connected to the mobile terminal 400 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input unit 430 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 430 may include a touch-sensitive surface 431 as well as other input devices 432. The touch-sensitive surface 431, also referred to as a touch display screen or a touch pad, may collect touch operations by a user on or near the touch-sensitive surface 431 (e.g., operations by a user on or near the touch-sensitive surface 431 using any suitable object or attachment such as a finger, a stylus, etc.) and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 431 may comprise both a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 480, and receives and executes commands sent from the processor 480. In addition, the touch-sensitive surface 431 may be implemented in various types, such as resistive, capacitive, infrared, and surface acoustic wave. The input unit 430 may include other input devices 432 in addition to the touch-sensitive surface 431. In particular, other input devices 432 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 440 may be used to display information input by or provided to the user and various graphical user interfaces of the mobile terminal 400, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 440 may include a Display panel 441, and optionally, the Display panel 441 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface 431 may overlay the display panel 441, and when a touch operation is detected on or near the touch-sensitive surface 431, the touch operation is transmitted to the processor 480 to determine the type of the touch event, and then the processor 480 provides a corresponding visual output on the display panel 441 according to the type of the touch event. Although the touch-sensitive surface 431 and the display panel 441 are shown as two separate components to implement input and output functions, in some embodiments, the touch-sensitive surface 431 and the display panel 441 may be integrated to implement input and output functions.

The mobile terminal 400 may also include at least one sensor 450, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 441 according to the brightness of ambient light, and a proximity sensor that may generate an interrupt when the folder is closed or closed. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which may be further configured on the mobile terminal 400, detailed descriptions thereof are omitted.

The audio circuit 460, speaker 461, microphone 462 may provide an audio interface between a user and the mobile terminal 400. The audio circuit 460 may transmit the electrical signal converted from the received audio data to the speaker 461, and convert the electrical signal into a sound signal for output by the speaker 461; on the other hand, the microphone 462 converts the collected sound signal into an electric signal, which is received by the audio circuit 460 and converted into audio data, which is then processed by the audio data output processor 480, and then transmitted to, for example, another terminal via the RF circuit 410, or output to the memory 420 for further processing. The audio circuit 460 may also include an earbud jack to provide communication of a peripheral headset with the mobile terminal 400.

The mobile terminal 400, which can assist the user in receiving requests, sending information, etc., through the transmission module 470 (e.g., Wi-Fi module), provides the user with wireless broadband internet access. Although the transmission module 470 is shown in the drawing, it is understood that it does not belong to the essential constitution of the mobile terminal 400 and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 480 is a control center of the mobile terminal 400, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal 400 and processes data by operating or executing software programs and/or modules stored in the memory 420 and calling data stored in the memory 420, thereby integrally monitoring the mobile terminal. Optionally, processor 480 may include one or more processing cores; in some embodiments, processor 480 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 480.

The mobile terminal 400 also includes a power supply 490 (e.g., a battery) for powering the various components, which may be logically connected to the processor 480 via a power management system that may be configured to manage charging, discharging, and power consumption management in some embodiments. The power supply 490 may also include one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and any like components.

Although not shown, the mobile terminal 400 further includes a camera (e.g., a front camera, a rear camera, etc.), a bluetooth module, a flashlight, etc., which are not described in detail herein. Specifically, in this embodiment, the display unit of the mobile terminal 400 is a touch screen display.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by using equivalents or equivalent substitutions fall within the scope of the claims of the present invention.

In summary, although the preferred embodiments of the present invention have been described above, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. A display panel, comprising:

a flexible substrate having a bending direction; and the number of the first and second groups,

the cathode layer is arranged above the flexible substrate and is provided with a plurality of grooves, and the grooves extend in the longitudinal direction perpendicular to the bending direction.

2. The display panel according to claim 1, wherein the display panel has a stacking direction perpendicular to the flexible substrate, wherein the groove extends in the stacking direction within the cathode layer, or wherein the groove penetrates the cathode layer in the stacking direction.

3. The display panel of claim 1, further comprising a pixel layer disposed between the flexible substrate and the cathode layer, the pixel layer having a plurality of organic light emitting units and a plurality of pixel defining units, the plurality of organic light emitting units being arranged at intervals, and each pixel defining unit being disposed between adjacent organic light emitting units, wherein:

the groove is positioned above the projection of the pixel limiting unit; and/or the presence of a gas in the gas,

the groove is located above the projection of the organic light emitting unit.

4. The display panel of claim 3, wherein the cathode layer continuously covers the pixel layer.

5. The display panel of claim 3, wherein the cathode layer comprises a first cathode structure and a second cathode structure, wherein:

the first cathode structure covers a plurality of the organic light emitting units;

the second cathode structure covers a plurality of the pixel defining units;

and wherein the first cathode structure has a first thickness and the second cathode structure has a second thickness, the first thickness being less than the second thickness.

6. The display panel of claim 5, wherein the area of the first cathode structure above the projection of each organic light emitting unit is equal.

7. The display panel according to claim 5, wherein the first cathode structure and the second cathode structure have a gap therebetween.

8. The display panel according to claim 5, wherein the first cathode structure has a first surface far from the organic light emitting unit, and the second cathode structure has a second surface near the pixel defining unit, wherein the first surface and the second surface are located on the same horizontal plane.

9. A display device characterized in that it comprises a display panel according to any one of claims 1 to 8.

10. A method for manufacturing a display panel, comprising:

providing a flexible substrate, wherein the flexible substrate is provided with a bending direction;

forming a cathode layer over the flexible substrate; and the combination of (a) and (b),

and etching the cathode layer to form a plurality of grooves, wherein the grooves extend along the longitudinal direction which is perpendicular to the bending direction.

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