CN113066934B - Display panel and mobile terminal - Google Patents
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- CN113066934B CN113066934B CN202110270188.1A CN202110270188A CN113066934B CN 113066934 B CN113066934 B CN 113066934B CN 202110270188 A CN202110270188 A CN 202110270188A CN 113066934 B CN113066934 B CN 113066934B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
- H10K50/155—Hole transporting layers comprising dopants
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
- H10K50/156—Hole transporting layers comprising a multilayered structure
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Abstract
The invention provides a display panel and a mobile terminal, wherein the display panel comprises a substrate, and a first electrode, at least one doped hole transport layer, a light emitting layer, an electron transport layer and a second electrode which are sequentially stacked on the substrate, wherein the doped hole transport layer comprises a first oxidation doped layer and a hole transport layer, the first oxidation doped layer comprises a plurality of first sub-doped regions, each first sub-doped region is not contacted with each other, and each first sub-doped region can form an electron center due to the fact that the first sub-doped regions of the first oxidation doped layer are not contacted with each other, and then holes of the hole transport layer can be attracted to the electron center due to the fact that electrons of the hole transport layer are attracted, so that energy bands of the hole transport layer are upwarp, the highest occupied track energy level of the hole transport layer is improved, potential barriers of the hole transport layer and the first electrode carriers are reduced, and accordingly light emitting efficiency of the display panel is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a mobile terminal.
Background
In recent years, OLED (Organic Light EmittingDiode ) display technology has been rapidly advanced due to rapid development of materials and devices, and has been increasingly mature, and has been focused by more and more researchers, and applied to display fields such as mobile phones, flat panels, televisions, and the like.
Generally, the core of an OLED display device is a display panel, and the display panel includes, from bottom to top, a back plate, a PI flexible substrate, a TFT integrated transistor, an OLED light emitting layer, a TFE encapsulation layer, a DOT touch layer, a bias patch, a cover glass, and the like. The OLED light-emitting layer emits light spectrum with different colors mainly by means of carrier injection, carrier transmission and carrier recombination, and is a key point of the whole display panel. The structure of the OLED luminescent layer is as follows from bottom to top: anode (ITO)/hole injection layer/hole transport layer/organic light emitting layer/electron transport layer/electron injection layer/cathode, etc. In the device manufacturing process, in order to reduce the potential barrier between the electrode and the P-type or N-type carrier transport layer, a doping method is generally used to generate band-bending (band-bending) at the interface so as to form an approximately ohmic interface.
In the existing process preparation flow, P-Dopant (P-type Dopant) and HTL (Hole Transport Layer ) are usually mixed and evaporated to form a uniformly doped thin film. However, the display panel obtained by the preparation method has a large potential barrier between the anode and the hole transport layer, so that the efficiency of injecting the P-type carriers from the anode to the hole transport layer is not high, and the luminous efficiency of the display panel is further affected.
Disclosure of Invention
The invention provides a display panel and a mobile terminal, which effectively solve the problem that the efficiency of injecting P-type carriers from an anode to a hole transport layer is low and the luminous efficiency of the display panel is influenced because the potential barrier between the anode and the hole transport layer is large.
In order to solve the above-described problems, the present invention provides a display panel including:
a substrate; the method comprises the steps of,
a first electrode, at least one doped hole transport layer, a light emitting layer, an electron transport layer and a second electrode which are sequentially stacked on the substrate;
the doped hole transport layer comprises a first oxidation doped layer and a hole transport layer, wherein the first oxidation doped layer comprises a plurality of first sub-doped regions, and each first sub-doped region is not contacted with each other.
Further preferably, the doping concentrations of the plurality of first sub-doped regions are equal, and the doping concentration is any value between 1% and 5%.
Further preferably, the areas of the plurality of first sub-doped regions are equal and/or the areas of the plurality of first sub-doped regions are not equal.
Further preferably, the first oxide doped layer is disposed above the hole transport layer and/or below the hole transport layer and/or inside the hole transport layer.
Further preferably, the first oxidation doped layer has a first lowest unoccupied orbital level, the hole transport layer has a first highest occupied orbital level, and a difference between the first lowest unoccupied orbital level and the first highest occupied orbital level is any value between 0.2eV and 0.5 eV.
Further preferably, the display panel further includes at least one hole injection layer disposed between the first electrode and the doped hole transport layer.
Further preferably, the hole injection layer includes a second oxidized doped layer including a plurality of second sub-doped regions, wherein each of the second sub-doped regions is not in contact with each other.
Further preferably, the second oxide doped layer is disposed on top of the hole injection layer and/or on the bottom of the hole injection layer and/or on the middle of the hole injection layer.
Further preferably, the display panel further includes an electron injection layer disposed between the electron transport layer and the second electrode.
On the other hand, the invention also provides a mobile terminal, which comprises the display panel of any one of the above.
The beneficial effects of the invention are as follows: the invention provides a display panel, which comprises a substrate, and a first electrode, at least one doped hole transport layer, a light emitting layer, an electron transport layer and a second electrode which are sequentially stacked on the substrate, wherein the doped hole transport layer comprises a first oxidation doped layer and a hole transport layer, the first oxidation doped layer comprises a plurality of first sub-doped regions, and each first sub-doped region is not contacted with each other.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments according to the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a display panel according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Fig. 4 is a further schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions 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 will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The invention aims at solving the problem that the luminous efficiency of the display panel is affected by the fact that the efficiency of injecting P-type carriers from an anode to a hole transport layer is low because the potential barrier between the anode and the hole transport layer is large in the conventional display panel.
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, and the components and the relative positional relationship of the components according to the embodiment of the present invention can be seen in a visual manner.
As shown in fig. 1, the display panel 100 includes a substrate 110, and a first electrode 120, at least one doped hole transport layer 130, a light emitting layer 140, an electron transport layer 150, and a second electrode 160 sequentially stacked on the substrate 110, wherein:
the doped hole transport layer 130 includes a first oxidized doped layer 131 and a hole transport layer 132, the first oxidized doped layer 131 includes a plurality of first sub-doped regions 1311, and each of the first sub-doped regions 1311 is not in contact with each other.
It is easily understood that, in the present embodiment, the first electrode 120 is an anode, and the potential barrier between the first electrode 120 and the doped hole transport layer 130 refers to the difference between the HOMO (Highest Occupied Molecular Orbital, highest occupied orbit) energy level of the first electrode 120 and the HOMO energy level of the doped hole transport layer 130. Further, the potential barrier between the first electrode 120 and the doped hole transport layer 130 determines the injection efficiency of carriers from the first electrode 120 into the doped hole transport layer 130, the greater the potential barrier between the first electrode 120 and the doped hole transport layer 130, the more difficult it is for holes in the first electrode 120 to be injected from the first electrode 120 into the doped hole transport layer 130, and the smaller the potential barrier between the first electrode 120 and the doped hole transport layer 130, the easier it is for holes in the first electrode 120 to be injected from the first electrode 120 into the doped hole transport layer 130.
It should be noted that, in the present embodiment, since the first doped sub-regions 1311 of the first oxidized doped layer 131 are designed to be in a structure that they do not contact each other, each first doped sub-region 1311 may attract and bind the electrons of the hole transporting layer 132 to form an electron center, and then, the holes of the hole transporting layer 132 may be attracted to the electron center, so that the energy band of the hole transporting layer 132 is tilted upward, and the HOMO energy level of the hole transporting layer 132 is lifted to move toward the guide band, thereby reducing the potential barrier between the hole transporting layer 132 and the first electrode 120, so that the holes of the first electrode 120 are easier to be injected into the hole transporting layer 132, improving the injection efficiency of the carriers of the first electrode 120, and further improving the light emitting efficiency of the display panel 100.
Further, the material used for the first oxidized doped layer 131 is an oxidizing agent to attract electrons of the hole transport layer 132, and exemplary materials for the first oxidized doped layer 131 include at least one of NDP-9, TCNQ, F4-TCNQ, PPDN. Generally, the HOMO level of the hole transport layer 132 needs to be close to the LUMO (Lowest Unoccupied Molecular Orbital, lowest unoccupied orbital) level of the first oxidized and doped layer 131, so that electrons of the HOMO level of the hole transport layer 132 easily jump to the LUMO level of the first oxidized and doped layer 131. In the present embodiment, the first oxide doped layer 131 has a first lowest unoccupied orbital level E 1 The hole transport layer 132 has a first highest occupied track energy level E 2 Wherein the first lowest track energy level E 1 With the first highest occupied track energy level E 2 Is any value between 0.2eV and 0.5 eV.
Further, please refer to fig. 1, in this embodiment, the doping concentrations of the plurality of first sub-doped regions 1311 are equal, and the doping concentration is any value between 1% and 5%, and in this embodiment, the areas of the plurality of first sub-doped regions 1311 are equal, however, in other variations of the present invention, the areas of the plurality of first sub-doped regions 1311 may be different from each other, or two of the areas may be equal to each other, and are not equal to each other, which is not described herein.
Further, with continued reference to fig. 1, in the present embodiment, the first oxide doped layer 131 is disposed above the hole transport layer 132, and it is easy to understand that, in other variants of the present invention, the first oxide doped layer 131 may be disposed below or inside the hole transport layer 132, or the display panel 100 may have a plurality of first oxide doped layers 131 disposed above, inside and below the hole transport layer 132, respectively.
It is to be readily understood that, in order to improve the light emitting efficiency of the display panel 100, a plurality of doped hole transport layers 130 may be provided, and the plurality of doped hole transport layers 130 are stacked and disposed over the first electrode 120.
Compared with the prior art, the invention provides a display panel 100, which comprises a substrate 110, and a first electrode 120, a doped hole transport layer 130, a light emitting layer 140, an electron transport layer 150 and a second electrode 160 which are sequentially stacked on the substrate 110, wherein the doped hole transport layer 130 comprises a first oxidized doped layer 131 and a hole transport layer 132, the first oxidized doped layer 131 comprises a plurality of first sub-doped regions 1311, and each first sub-doped region 1311 is not contacted with each other, and the first sub-doped regions 1311 of the first oxidized doped layer 131 are designed to be in a structure which is not contacted with each other, so that each first sub-doped region 1311 can form an electron center because of electrons which bind the hole transport layer 132, and further, holes of the hole transport layer 132 can be attracted to the electron center, thereby raising the highest occupied track energy level of the hole transport layer 132, reducing the potential barrier between the hole transport layer 132 and the first electrode 120, enabling the first sub-doped region 1311 to be more easily injected into the first electrode 120, improving the light emitting efficiency of the display panel 120, and further improving the efficiency of the display panel 120.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display panel 200 according to a second embodiment of the present invention, and the components and the relative positional relationship of the components according to the embodiment of the present invention can be seen in a very intuitive manner.
As shown in fig. 2, the second embodiment has substantially the same structure as the first embodiment, wherein the substrate 210 in the second embodiment has the same function and arrangement position as the substrate 110 in the first embodiment; the first electrode 220 in the second embodiment has the same function and arrangement position as the first electrode 120 in the first embodiment; the at least one doped hole transport layer 230 (including the first oxidized doped layer 231 and the hole transport layer 232, and the first oxidized doped layer 231 includes a plurality of first sub-doped regions 2311) in the second embodiment has the same function as the at least one doped hole transport layer 130 (including the first oxidized doped layer 131 and the hole transport layer 132, and the first oxidized doped layer 131 includes a plurality of first sub-doped regions 1311) in the first embodiment; the light emitting layer 240 in the second embodiment functions as the light emitting layer 140 in the first embodiment and is disposed at the same position; the electron transport layer 250 in the second embodiment has the same function and arrangement position as the electron transport layer 150 in the first embodiment; the second electrode 260 in the second embodiment functions the same as the second electrode 160 in the first embodiment.
The difference is that in the present embodiment, a hole injection layer 270 is further disposed between the first electrode 220 and the doped hole transport layer 230, and the hole injection layer 270 includes a second oxide doped layer 271, where the second oxide doped layer 271 is disposed on top of the hole injection layer 270 and includes a plurality of second sub-doped regions 2711, and each of the second sub-doped regions 2711 is not in contact with each other. Meanwhile, in the present embodiment, an electron injection layer 280 is further disposed between the electron transport layer 250 and the second electrode 260, and the electron injection layer 280 may improve the efficiency of injecting electrons into the electron transport layer 250 by the second electrode 260.
It is to be readily understood that, in other modification examples of the present invention, the display panel 200 may include a plurality of hole injection layers 270, and the plurality of hole injection layers 270 are stacked between the first electrode 220 and the doped hole transport layer 230. Further, in other modifications of the present invention, the second oxide doped layer 271 may be disposed at the bottom or middle of the hole injection layer 270, or the display panel 200 may have a plurality of second oxide doped layers 271 disposed at the top, bottom or middle of the hole injection layer 270, respectively.
Further, in the electron transport layer 250 and the electron injection layer 280, a reducing agent may be doped to bend the energy bands of the electron transport layer 250 and the electron injection layer 280, reduce the potential barrier between the electron transport layer 250 and the electron injection layer 280, and between the electron injection layer 280 and the second electrode 260, make the electrons in the second electrode 260 easier to inject into the electron injection layer 280, and make the electrons in the electron injection layer 280 easier to inject into the electron transport layer 250. It should be noted that in the electron transport layer 250 and the electron injection layer 280, the doped regions doped with the reducing agent are preferably in a structure not contacting each other to minimize the energy level barrier between the adjacent layers, and exemplary materials of the reducing agent include at least one of NTCDA, PTCDA, liF, li, cs, csCO, liCO.
Unlike the prior art, the present invention provides a display panel 200 comprising a substrate 210, and a first electrode 220, a hole injection layer 270, a doped hole transport layer 230, a light emitting layer 240, an electron transport layer 250, an electron injection layer 280, and a second electrode 260 sequentially stacked on the substrate 210, wherein the doped hole transport layer 230 comprises a first oxidized doping layer 231 and a hole transport layer 232, the first oxidized doping layer 231 comprises a plurality of first sub-doping regions 2311, each of the first sub-doping regions 2311 is not contacted with each other, the second oxidized doping layer 271 comprises a plurality of second sub-doping regions 2711, wherein each of the second sub-doping regions 2711 is not contacted with each other, the display panel 200 provided with the hole injection layer 270, and each of the second sub-doping regions 2711 in the second oxidized doping layers 271 in the hole injection layer 270 is not contacted with each other, therefore, each second doped region 2711 forms an electron center due to the attraction of electrons bound to the hole injection layer 270, and further, holes of the hole injection layer 270 are attracted to the electron center, so that the energy band of the hole injection layer 270 is tilted upward, the highest occupied orbit energy level of the hole injection layer 270 is raised, the potential barrier between the hole injection layer 270 and the first electrode 220 is reduced, holes of the first electrode 220 are easier to inject into the hole injection layer 270, the injection efficiency of carriers of the first electrode 220 is improved, and similarly, the potential barrier between the hole injection layer 270 and the doped hole transport layer 230 is reduced due to the design of the first doped region 2311 which is not contacted with each other, so that holes in the hole injection layer 270 are easier to inject into the doped hole transport layer 230, the injection efficiency of carriers of the hole injection layer 270 is improved, and meanwhile, because the electron injection layer 280 is arranged between the electron transport layer 250 and the second electrode 260, the efficiency of injecting electrons from the second electrode 260 into the electron transport layer 250 may be improved, thereby improving the light emitting efficiency of the display panel 200.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention, where the mobile terminal may be a smart phone or a tablet computer, and each component of the present invention and the relative positional relationship of each component can be intuitively seen from the diagram.
As shown in fig. 3, the mobile terminal 300 includes a processor 380, a memory 320. The processor 380 is electrically connected to the memory 320.
Referring to fig. 4, fig. 4 is a schematic diagram of a detailed structure of a mobile terminal according to an embodiment of the present invention, where the mobile terminal may be a smart phone or a tablet computer, and the components of the present invention and the relative positional relationship of the components can be intuitively seen from the figure.
Fig. 4 shows a specific block diagram of a mobile terminal 300 according to an embodiment of the present invention. As shown in fig. 4, the mobile terminal 300 may include radio frequency (RF, radioFrequency) circuitry 310, memory 321 including one or more computer-readable storage media, an input unit 330, a display unit 340, a sensor 350, audio circuitry 360, a transmission module 370 (e.g., wireless fidelity, wiFi, wireless Fidelity), a processor 380 including one or more processing cores, and a power supply 390. Those skilled in the art will appreciate that the mobile terminal structure shown in fig. 4 is not limiting of the mobile terminal and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
The RF circuit 310 is configured to receive and transmit electromagnetic waves, and to perform mutual conversion between the electromagnetic waves and the electrical signals, thereby communicating with a communication network or other devices. RF circuitry 310 may include various existing circuit components for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and the like. The RF circuitry 310 may communicate with various networks such as the internet, intranets, wireless networks, or other devices via wireless networks. The wireless network may include 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 communications (Global System for Mobile Communication, GSM), enhanced mobile communications technology (Enhanced Data GSM Environment, EDGE), wideband code division multiple access technology (Wideband Code Division Multiple Access, WCDMA), code division multiple access technology (Code Division Access, CDMA), time division multiple access technology (TimeDivision Multiple Access, TDMA), wireless fidelity (Wi-Fi) (e.g., american society of electrical and electronic engineers standards IEEE802.11 a, IEEE802.11 b, IEEE802.11g, and/or IEEE802.11 n), internet telephony (Voice over Internet Protocol, voIP), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wi-Max), other protocols for mail, instant messaging, and short messaging, as well as any other suitable communication protocols, including even those not currently developed.
The memory 320 may be used for storing software programs and modules, such as corresponding program instructions in the above-mentioned audio power amplifier control method, and the processor 380 executes the software programs and modules stored in the memory 120, thereby performing various functional applications and data processing, i.e. obtaining the frequency of the information transmission signal transmitted by the mobile terminal 300. Generating an interference signal and the like. Memory 320 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, memory 320 may further include memory located remotely from processor 380, which may be connected to mobile terminal 300 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 330 may be used to receive input numeric or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 330 may include a touch-sensitive surface 331 as well as other input devices 332. The touch-sensitive surface 331, also referred to as a touch display screen or a touch pad, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch-sensitive surface 331 or thereabout using any suitable object or accessory such as a finger, stylus, etc.), and actuate the corresponding connection means according to a predetermined program. Alternatively, the touch sensitive surface 331 may comprise two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth 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 detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 380, and can receive and execute commands sent from the processor 380. In addition, the touch-sensitive surface 331 may be implemented in a variety of types, such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch-sensitive surface 331, the input unit 330 may also comprise other input devices 332. In particular, other input devices 332 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, mouse, joystick, etc.
The display unit 340 may be used to display information input by a user or information provided to the user and various graphical user interfaces of the mobile terminal 300, which may be composed of graphics, text, icons, video, and any combination thereof. The display unit 340 may include a display panel 341, and optionally, the display panel 341 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 331 may overlay the display panel 341 and, upon detection of a touch operation thereon or thereabout by the touch sensitive surface 331, is communicated to the processor 380 to determine the type of touch event, and the processor 380 then provides a corresponding visual output on the display panel 341 based on the type of touch event. Although in the figures the touch sensitive surface 331 and the display panel 341 are implemented as two separate components, in some embodiments the touch sensitive surface 331 may be integrated with the display panel 341 to implement the input and output functions.
The mobile terminal 300 may also include at least one sensor 350, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 341 according to the brightness of ambient light, and the proximity sensor may generate an interruption when the flip cover is closed or closed. As one of the motion sensors, the gravitational acceleration sensor may detect the acceleration in each direction (generally, three axes), and may detect the gravity and direction when stationary, and may be used for applications of recognizing the gesture of the mobile phone (such as horizontal/vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer, and knocking), and other sensors such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, which may be further configured in the mobile terminal 300, will not be described herein.
The mobile terminal 300 may facilitate user reception of requests, transmission of information, etc. via the transmission module 370 (e.g., wi-Fi module), which provides wireless broadband internet access to the user. Although the transmission module 370 is shown in the drawings, it is understood that it does not belong to the essential constitution of the mobile terminal 300, and can be omitted entirely as required within the scope of not changing the essence of the invention.
The processor 380 is a control center of the mobile terminal 300, connects various parts of the entire handset using various interfaces and lines, and performs various functions of the mobile terminal 300 and processes data by running or executing software programs and/or modules stored in the memory 320, and calling data stored in the memory 320, thereby performing overall monitoring of the mobile terminal. Optionally, processor 380 may include one or more processing cores; in some embodiments, processor 380 may integrate an application processor that primarily processes operating systems, user interfaces, applications, etc., with a modem processor that primarily processes wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 380.
The mobile terminal 300 also includes a power supply 390 (e.g., a battery) that provides power to the various components, and in some embodiments, may be logically coupled to the processor 380 via a power management system to perform functions such as managing charging, discharging, and power consumption via the power management system. Power supply 390 may also include one or more of any of a DC or AC power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
Although not shown, the mobile terminal 300 further includes a camera (e.g., front camera, rear camera, etc.), a bluetooth module, a flashlight, etc., which are not described herein. In particular, in the present embodiment, the display unit of the mobile terminal 300 is a touch screen display.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes adopting equivalent replacement or equivalent replacement fall within the protection scope of the invention.
In summary, although the preferred embodiments of the present invention have been described above, the above preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various modifications and adaptations without departing from the spirit and scope of the present invention, so that the scope of the present invention is defined by the claims.
Claims (8)
1. A display panel, the display panel comprising:
a substrate; the method comprises the steps of,
a first electrode, at least one hole injection layer, at least one doped hole transport layer, a light emitting layer, an electron transport layer and a second electrode which are sequentially stacked on the substrate;
the doped hole transport layer comprises a first oxidation doped layer and a hole transport layer, wherein the first oxidation doped layer comprises a plurality of first sub-doped regions, and each first sub-doped region is not contacted with each other;
the hole injection layer is arranged between the first electrode and the doped hole transport layer, the hole injection layer comprises a second oxidation doping layer, the second oxidation doping layer comprises a plurality of second sub-doping regions, and each second sub-doping region is not contacted with each other.
2. The display panel of claim 1, wherein the doping concentrations of the plurality of first sub-doped regions are equal and the doping concentration is any value between 1% -5%.
3. The display panel of claim 1, wherein the areas of the plurality of first sub-doped regions are equal and/or the areas of the plurality of first sub-doped regions are unequal.
4. The display panel according to claim 1, wherein the first oxide doping layer is disposed above the hole transport layer and/or below the hole transport layer and/or inside the hole transport layer.
5. The display panel of claim 1, wherein the first oxidized doped layer has a first lowest unoccupied orbital level, the hole transport layer has a first highest occupied orbital level, and a difference between the first lowest unoccupied orbital level and the first highest occupied orbital level is any value between 0.2eV and 0.5 eV.
6. The display panel according to claim 1, wherein the second oxide doped layer is disposed on top of the hole injection layer and/or on the bottom of the hole injection layer and/or on the middle of the hole injection layer.
7. The display panel of claim 1, further comprising an electron injection layer disposed between the electron transport layer and the second electrode.
8. A mobile terminal, characterized in that it comprises a display panel according to any of claims 1-7.
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