Display panels, screens and terminals

Abstract

The present disclosure relates to a display panel, a display screen and a terminal. The display panel has a light-transmitting display area corresponding to an optical component arranged below the display panel, including: a first electrode; a light-emitting material layer, the light-emitting material layer is arranged below the first electrode; a second electrode, the second electrode is arranged below the light-emitting material, and the second electrode has a polarity opposite to that of the first electrode; at least in the light-transmitting display area, the second electrode forms a gap for light to pass through; and the second electrode includes a reflective layer and an anti-reflective layer arranged on a side of the reflective layer close to the optical component, wherein the anti-reflective layer is used to absorb light reflected by the optical component. By arranging an anti-reflective layer on a side of the reflective layer close to the optical component, it is avoided that the reflected light generated when the incident light passes through the optical component under the screen is reflected by the reflective layer and enters the optical component again, thereby reducing the lighting effect of the display panel on the optical component and improving the reliability of light collection.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel, a display screen and a terminal. Background Art

[0002] At present, AMOLED (Active-matrix organic light-emitting diode) display panels are used in terminals such as mobile phones and tablets. In addition, in full-screen terminal devices, in order to increase the screen-to-body ratio, the display panel area is constantly expanding. This makes it difficult to design optical components such as cameras and optical sensors on one side of the display panel. If they are set at the edge of the display panel, the screen-to-body ratio will be reduced, affecting the appearance; if they are set under the screen, the lighting will be affected, the reliability of light collection will be poor, the imaging quality of the camera will be low, and the detection accuracy of the optical sensor will be poor. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a display panel, a display screen and a terminal.

[0004] According to a first aspect of an embodiment of the present disclosure, a display panel is provided, wherein the display panel has a light-transmitting display area corresponding to an optical component arranged below the display panel; the display panel comprises: a first electrode; a light-emitting material layer, wherein the light-emitting material layer is arranged below the first electrode; a second electrode, wherein the second electrode is arranged below the light-emitting material, and the polarity of the second electrode is opposite to that of the first electrode; wherein, at least in the light-transmitting display area, the second electrode forms a gap for light to pass through; and the second electrode comprises a reflective layer, and an anti-reflective layer arranged on a side of the reflective layer close to the optical component, wherein the anti-reflective layer is used to absorb light reflected by the optical component.

[0005] In one embodiment, the second electrode includes a first transparent electrode layer disposed below the light reflecting layer; the anti-reflection layer is disposed between the light reflecting layer and the first transparent electrode layer, or the anti-reflection layer is disposed on the lower surface of the first transparent electrode layer.

[0006] In one embodiment, the anti-reflection layer is made of black material.

[0007] In one embodiment, the anti-reflection layer is a black matrix made of one or more of the following materials: chromium, chromium oxide or black resin.

[0008] In one embodiment, the second electrode includes a light-shielding electrode layer disposed below the light-reflecting layer. The light-shielding electrode layer is made of a non-transparent and anti-reflective material, and the light-shielding electrode layer serves as the anti-reflective layer.

[0009] In one embodiment, the second electrode further includes: a second transparent electrode layer, and the second transparent electrode layer is disposed above the light reflecting layer.

[0010] In one embodiment, the display panel also includes: a thin film crystal layer, which is arranged under the second electrode; the thin film crystal layer includes a plurality of driving circuits, and the driving circuits are used to drive the light-emitting devices in the light-emitting material layer to emit light, wherein the driving circuits corresponding to some or all of the light-emitting devices in the translucent display area are arranged outside the translucent display area.

[0011] In one embodiment, the first electrode is a cathode, and the second electrode is an anode.

[0012] According to a second aspect of an embodiment of the present disclosure, a display screen is provided, comprising: a display panel as described in the first aspect; and an optical component, disposed below the display panel and corresponding to the light-transmitting display area.

[0013] According to a third aspect of an embodiment of the present disclosure, a terminal is provided, comprising: a display screen as described in the second aspect.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by providing an anti-reflection layer on the side of the reflective layer close to the optical component, it is avoided that the reflected light generated when the incident light passes through the optical component under the screen is reflected by the reflective layer and enters the optical component again, thereby reducing the lighting effect of the display panel on the optical components under the screen such as cameras, optical sensors, etc., and improving the reliability of light collection by the optical components under the screen.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 It is a structural schematic diagram of a terminal device according to a related technology.

[0018] Figure 2 It is a structural schematic diagram of a terminal device according to another related technology.

[0019] Figure 3 It is a structural schematic diagram of a terminal device according to another related technology.

[0020] Figure 4The diagram is a schematic structural diagram of a display panel according to a related technology.

[0021] Figure 5 The diagram is a schematic structural diagram of a display panel according to a related technology.

[0022] Figure 6 The present invention is a schematic structural diagram of a display panel according to an exemplary embodiment of the present invention.

[0023] Figure 7 is a schematic structural diagram of a display panel according to another exemplary embodiment of the present disclosure.

[0024] Figure 8 The diagram is a schematic diagram of a first electrode structure of a light-emitting structure of a display panel according to an exemplary embodiment of the disclosure.

[0025] Fig. 9 is a schematic diagram of a first electrode structure of a light-emitting structure of a display panel according to another exemplary embodiment of the present disclosure.

[0026] Fig.10 is a schematic diagram of a first electrode structure of a light-emitting structure of a display panel according to another exemplary embodiment of the present disclosure.

[0027] Fig.11 The present invention is a schematic diagram of a terminal structure according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] At present, terminals using AMOLED display panels are becoming more and more popular. At the same time, for the needs of video calls, terminal devices will also be equipped with cameras on the front of the display panel, or corresponding optical sensors for detection needs. Cameras, optical sensors or other optical components often need to collect external optics through lenses.

[0030] In some related technologies, such as Figure 1As shown, the terminal 10 has a display panel 11 and also includes a camera 12 arranged on the same side as the display panel 11. Since the camera 12 needs to be arranged, the display panel 11 cannot be extended to the uppermost end of the side of the terminal 10, so that part of the space at the upper end cannot be used for display, and the screen-to-body ratio is low, which cannot meet user needs.

[0031] In other related technologies, such as Figure 2 As shown, another terminal 20 has a display panel 21 and also includes a camera 22 arranged on the same side as the display panel 21. Compared with the design in the previous solution, the area of ​​the display panel 21 is further enlarged in the terminal 20, and the screen-to-body ratio is improved, but space still needs to be reserved at the position of the camera 22 for opening and other settings, and display cannot be performed.

[0032] In some other related technologies, such as Figure 3 As shown, another terminal 30 has a display panel 31, and also includes an optical component 32 such as a camera or an optical sensor disposed under the display panel 31. Compared with the design of the first two schemes, the terminal 30 uses an optical component 32 under the screen, and the external incident light can partially penetrate the display panel 31 and enter the optical component 32. This method can maximize the screen-to-body ratio. However, it will also affect the lighting effect. At the same time, Figure 4 As shown, in the AMOLED display panel, a light emitting structure 40 is included. The light emitting structure 40 generally includes a first electrode 41, a light emitting material 42, and a second electrode 43. In order to improve the brightness of the display panel 31, a reflective layer may be provided in the second electrode 43 to reflect the light emitted by the light emitting material 42. When the under-screen optical component 32 is provided, as shown in FIG. Figure 5 As shown, the second electrodes 43 are arranged at intervals so that external incident light can pass through the second electrode 43 and enter the optical component 32. When the incident light enters the optical component 32, part of the light will be reflected on the lens surface of the optical component 32, and the reflected light will be projected onto the back of the second electrode 43 and reflected again to the optical component 32 through the reflective layer, thereby generating an optical path difference, causing the quality of the image taken by the camera to deteriorate, or causing misjudgment of the optical sensor, etc.

[0033] In order to solve the above technical problems, the present disclosure provides a display panel 50, which can improve the image quality captured by the camera set under the screen and reduce the influence of the display panel on the camera lighting. Fig.11As shown, the display panel 50 can be applied to a terminal 80. The terminal 80 can include a display panel 50 and an optical component 60 located below the display panel 50. The optical component 60 can be a camera or an optical sensor or other device that receives light. The display panel 50 can have a light-transmitting display area 500 corresponding to the optical component 60. The optical component 60 is arranged below the light-transmitting display area. External light passes through the display panel 50 through the light-transmitting display area 500 and enters the optical component 60. The light-transmitting display area 500 of the display panel 50 can be arranged differently from the non-light-transmitting display area to improve the penetration rate of the incident light, that is, to allow more light to enter the optical component 60, so that the lighting effect of the optical component 60 is better, the reliability is improved, the imaging quality of the camera is higher, or the accuracy of the optical sensor is improved.

[0034] like Figure 6 , Figure 7 As shown, the display panel 50 may include a light-emitting structure 51, a thin film crystal layer 52 disposed below the light-emitting structure, and a substrate 53 disposed below the thin film crystal layer 52. The display panel 50 using AMOLED is made, and the circuit of the thin film crystal layer 52, such as a driving circuit, is made on the substrate 53, and then the light-emitting structure 51 is made on the circuit of the thin film crystal layer 52. In the embodiment of the present disclosure, the top generally refers to the direction toward the outside of the display screen, which is also the direction from the inside of the terminal toward the outside of the terminal. Among them, the light-emitting structure 51 may include a first electrode 511, a light-emitting material layer 512, and a second electrode 513. The first electrode 511 is located at the top and may be a transparent material so that light can pass through, which can ensure that the light of the display screen is emitted from the bottom to the top, and can also ensure that the external light that the optical component 60 under the screen needs to collect enters. The light-emitting material layer 512 is arranged below the first electrode 511, and can emit light of corresponding colors according to the control signal, and the light is emitted from the first electrode 511 to the outside to form a display screen. The second electrode 513 is disposed below the light-emitting material layer 512 and has a polarity opposite to that of the first electrode 511. In some embodiments, the second electrode 513 may be an anode and the first electrode 511 may be a cathode. The anode eliminates electrons through current to form electron holes, and the cathode emits electrons through current. The electrons pass through the light-emitting material layer 512 to excite the light-emitting material layer 512 to emit light.

[0035] In the embodiment of the present disclosure, the second electrode 513 is formed with a gap for light to pass through at least in the light-transmitting display area, and the second electrode 513 includes a reflective layer 5132 and an anti-reflective layer 5133 arranged on a side of the reflective layer 5132 close to the optical component, wherein the anti-reflective layer 5133 is used to absorb the light reflected by the optical component 60. The anti-reflective layer 5133 may also be provided in other areas, and the anti-reflective layer 5133 is provided only in the light-transmitting display area to save costs. In order to ensure the display quality of the display panel 50, it is necessary to provide a reflective layer 5132, and the reflective layer 5132 can be formed of Ag (silver). The reflective layer 5132 cannot allow the light incident from above to continue to be sent downward, so in order to ensure that the incident light from the outside can pass smoothly and enter the lens of the optical component 60, the second electrode 513 is formed with a gap for light to pass through at least in the light-transmitting display area 500. Since the lens of the optical component 60 is made of transparent material, light will also be partially reflected when entering the lens surface. As mentioned above, if the reflected light is reflected back to the lens through the reflective layer 5132, the image quality of the camera will be reduced or the inspection reliability of the optical sensor will be reduced due to the optical path difference. In the embodiment of the present disclosure, an anti-reflection layer 5133 is also provided under the reflective layer 5132. The anti-reflection layer 5133 can avoid light reflection and absorb light, thereby avoiding the influence caused by the external light being reflected by the lens of the optical component 60 and then reflected by the reflective layer 5132 to the lens again.

[0036] In some embodiments, the anti-reflection layer 5133 may be a black material, which absorbs light and prevents light reflection due to the characteristics of black. For example, it may be a black layer formed by ink silk screen printing technology, or a black organic material. In some specific embodiments, the black material of the anti-reflection layer 5133 may be formed by a Black Matrix material, and the Black Matrix may be made of one or more of the following materials to absorb light: Cr (chromium), CrOx (chromium oxide), or Black Resin.

[0037] In the embodiments of the present disclosure, Figure 8 , Fig. 9 As shown, the second electrode 513 may further include a first transparent electrode layer 5134 disposed below the light reflecting layer 5132. The first transparent electrode layer 5134 may be a transparent conductive film formed of ITO (Indium Tin Oxide). Figure 8As shown, the anti-reflection layer 5133 can be disposed between the reflective layer 5132 and the first transparent electrode layer 5134. The anti-reflection layer 5133 can be formed on the lower surface of the reflective layer 5132 or on the upper surface of the first transparent electrode layer 5134, so as to be disposed between the reflective layer 5132 and the first transparent electrode layer 5134 to block the light reflected from the lens from being reflected again. In another embodiment, as Fig. 9 As shown, the anti-reflection layer 5133 can also be arranged on the lower surface of the first transparent electrode layer 5134. This method is more convenient to manufacture and can also prevent the light reflected by the lens below from being reflected again.

[0038] In other embodiments of the present disclosure, Fig.10 As shown, the second electrode 513 may also include a light shielding electrode layer 5135 disposed below the reflective layer 5132. The light shielding electrode layer 5135 is made of a non-transparent and anti-reflective material, and the light shielding electrode layer 5135 serves as an anti-reflective layer. In this embodiment, compared with the original structure, there is no need to set an additional layer for light shielding, but the electrode layer located below is made of an opaque and non-reflective material, thereby avoiding the re-reflection of the light reflected by the lens below, and at the same time, there is no need to increase the overall thickness of the display panel 50.

[0039] like Figure 8 , Fig. 9 , Fig.10 As shown, the second electrode 513 further includes: a second transparent electrode layer 5131, and the second transparent electrode layer 5131 is arranged above the light reflecting layer 5132. In this embodiment, the second electrode 513 further includes a second transparent electrode layer 5131 arranged above the light reflecting layer 5132, and the second transparent electrode layer 5131 is made of transparent material, so that the light emitted by the light emitting material layer 512 can pass through the second transparent electrode layer 5131, so that the display brightness can be improved through reflection of the light reflecting layer 5132. In some embodiments, the second transparent electrode layer 5131 can also be a transparent conductive film formed by ITO, and the second transparent electrode layer 5131, the light reflecting layer 5132, and the first transparent electrode layer 5134 can form an anode structure of ITO / Ag / ITO.

[0040] The display panel 50 of any of the above embodiments is provided with an anti-reflection layer under the reflective layer, thereby preventing the light reflected by the lens of the optical component 60 from entering the lens again after being reflected by the reflective layer, resulting in the influence of the optical path difference on the image, thereby improving the imaging quality of the under-screen camera and the sensing quality of the under-screen optical sensor. For a full-screen terminal, while being able to increase the screen-to-body ratio, ensuring that the optical components on the front are arranged under the screen can also avoid the adverse effects of light collection and ensure the reliability of light collection.

[0041] In some embodiments, a plurality of driving circuits may be formed on the thin film crystal layer 52 to drive the light emitting devices in the light emitting material layer 512 to emit light, wherein the driving circuits corresponding to some or all of the light emitting devices in the light-transmitting display area 500 are arranged outside the light-transmitting display area 500. Since the driving circuit is generally made of an opaque material, it will hinder the propagation of light and is the main factor affecting the light transmittance of the thin film crystal layer 52. In this embodiment, by setting all or part of the driving circuits of the light emitting devices in the light-transmitting display area 500 in an area outside the light-transmitting display area 500, the number of driving circuits in the light-transmitting display area 500 is reduced, thereby improving the light transmittance, allowing more external light to enter the optical component 60 below the light-transmitting display area, and improving the lighting efficiency of the optical component 60. The image captured by the camera can be clearer, and the sensing of the optical sensor can also be made more accurate.

[0042] Based on the same concept, the present disclosure also provides a display screen, such as Figure 7 As shown, the display screen of the present disclosure includes a display panel 50 as in any of the aforementioned embodiments, and an optical component 60 disposed below the display panel 50 , and the optical component 60 corresponds to a light-transmitting display area of ​​the display panel 50 .

[0043] The display screen of the present disclosure can emit emission light through the luminescent material layer 512, and the emission light diffuses outside the display screen to form a display image. External light can enter the optical component 60 located below the light-transmitting display area of ​​the display panel 50 through the display panel 50, so that the optical component 60 can collect external light, such as a camera can form a photo or video or preview image, or as an optical sensor under the screen for sensing. Among them, there can be multiple optical components 60 arranged below the display panel 50, for example, a camera and an optical sensor are arranged at the same time, and accordingly, the light-transmitting display area of ​​the display panel 50 can also be correspondingly arranged with multiple. Since an anti-reflection layer is arranged below the reflective layer 5132 in the second electrode 513 of the display panel 50, it is avoided that the light reflected by the lens enters the lens again after being reflected by the reflective layer, resulting in the influence of the optical path difference on the light collection.

[0044] Based on the same concept, Fig.11As shown, the present disclosure further provides a terminal 80. The terminal 80 of the present disclosure includes a display screen of any of the aforementioned embodiments. The terminal 80 of the present disclosure embodiment can use the display screen of the present disclosure embodiment on any side or any display screen of the terminal 80, that is, an optical component 60 is arranged under the display panel 50, and a light-transmitting display area 500 is arranged at a corresponding position, and the display panel 50 adopts the structure of the display panel 50 of any of the aforementioned embodiments, so as to ensure the light collection reliability of the optical component 60 arranged under the screen, improve the imaging quality of the camera under the screen, and also improve the accuracy of sensing of the optical sensor under the screen.

[0045] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0046] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0047] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0048] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0049] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0050] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0051] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A display panel, characterized in that: The display panel has a light-transmitting display area corresponding to the optical component disposed below the display panel; The display panel comprises: a first electrode; a light-emitting material layer, wherein the light-emitting material layer is disposed below the first electrode; a second electrode, the second electrode being disposed below the light-emitting material layer and having a polarity opposite to that of the first electrode; Wherein, at least in the light-transmitting display area, the second electrode forms a gap for light to pass through; and the second electrode includes a reflective layer and an anti-reflective layer arranged on a side of the reflective layer close to the optical component, wherein the anti-reflective layer is used to absorb light reflected by the optical component.

2. The display panel according to claim 1, characterized in that: The second electrode comprises a first transparent electrode layer disposed below the light reflecting layer; The anti-reflection layer is disposed between the reflective layer and the first transparent electrode layer, or the anti-reflection layer is disposed on the lower surface of the first transparent electrode layer.

3. The display panel according to claim 2, characterized in that: The anti-reflection layer is made of black material.

4. The display panel according to claim 3, characterized in that: The anti-reflection layer is a black matrix made of one or more of the following materials: chromium, chromium oxide or black resin.

5. The display panel according to claim 1, characterized in that: The second electrode includes a light-shielding electrode layer disposed below the light-reflecting layer. The light-shielding electrode layer is made of a non-transparent and anti-reflective material and serves as the anti-reflective layer.

6. The display panel according to any one of claims 1 to 5, characterized in that: The second electrode further includes: a second transparent electrode layer, and the second transparent electrode layer is arranged above the light reflecting layer.

7. The display panel according to claim 1, characterized in that: The display panel further includes: A thin film transistor layer, wherein the thin film transistor layer is disposed below the second electrode; The thin film crystal layer includes a plurality of driving circuits, and the driving circuits are used to drive the light emitting devices in the light emitting material layer to emit light, wherein the driving circuits corresponding to some or all of the light emitting devices in the light-transmitting display area are arranged outside the light-transmitting display area.

8. The display panel according to claim 1, characterized in that: The first electrode is a cathode, and the second electrode is an anode.

9. A display screen, characterized in that: The display screen comprises: The display panel according to any one of claims 1 to 8; and The optical component is arranged below the display panel and corresponds to the light-transmitting display area.

10. A terminal, characterized in that: The terminal comprises: The display screen as claimed in claim 9.

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