Display panel and display device comprising the same

Abstract

This application provides a display panel and a display device including the same, relating to the field of display technology. The display panel includes a pixel layer comprising a first pixel, a second pixel, and a common electrode; a first touch layer comprising a plurality of first touch electrodes disposed on the light-emitting side of the pixel layer; a privacy layer comprising a plurality of light-blocking blocks disposed on the side of the first touch layer opposite to the pixel layer; the first pixel has a first emitted light, the first emitted light being incident on an incident point on the surface of the light-blocking block near the pixel layer, the incident path of the first emitted light not overlapping with the first touch electrodes, and in a direction parallel to the display panel, the first touch electrodes are located between the incident path and the second pixel. This application, by adjusting the film layer stacking, electrode transmittance, or adding a light-absorbing layer, can prevent light leakage caused by the large-viewing-angle emitted light from the privacy pixel being reflected to the non-privacy pixel through the reflection path of the touch electrode and the cathode, thereby improving the privacy effect of the display panel.

Description

Technical Field

[0001] This application relates to the technical field of display screen design, and in particular to a display panel and a display device including the same. Background Technology

[0002] With the widespread application of OLED (Organic Light-Emitting Diode) display technology in the automotive field, the demand for privacy protection for in-vehicle screens is gradually increasing, including but not limited to full-screen privacy protection functions. For example, when the front passenger or rear passenger is watching the screen content, the full-screen privacy protection function can prevent the driver from being distracted by seeing the screen content, thereby ensuring driving safety.

[0003] Currently, to achieve the above functions, most in-vehicle privacy displays use an embedded privacy structure as the mainstream privacy technology. In existing embedded privacy OLED display panels, such as... Figure 9 As shown, the privacy protection layer is usually placed on the side of the touch structure layer away from the pixel layer, that is, the touch layer is below and the privacy protection layer is above.

[0004] However, in this design, some of the light emitted from the privacy pixels at a wider viewing angle preferentially illuminates the surface of the touch electrode, is reflected by the touch electrode to the cathode, and then reflected again by the cathode before exiting from the non-privacy pixel area. This reflected light path causes light that should be confined within the privacy pixel's viewing angle to ultimately leak from the light-emitting area of ​​the non-privacy pixel to the outside, thus weakening the privacy protection effect of the display.

[0005] In conclusion, effectively reducing light leakage from privacy pixels to non-privacy pixels from wide viewing angles has become a key technical issue in improving the privacy protection effect of OLED display panels. Summary of the Invention

[0006] To address the aforementioned technical problem of effectively reducing light leakage from privacy-protected pixels to non-privacy-protected pixels over wide viewing angles, a first aspect of this application provides a display panel, comprising:

[0007] The pixel layer includes the first pixel, the second pixel, and the common electrode;

[0008] The first touch layer includes multiple first touch electrodes, which are disposed on the light-emitting side of the pixel layer;

[0009] A privacy layer, comprising multiple light-blocking blocks, is disposed on the side of the first touch layer opposite to the pixel layer;

[0010] The first pixel has a first emitted light, which is incident on the surface of the light-blocking block near the pixel layer. The incident path of the first emitted light from the first pixel to the incident point does not overlap with the first touch electrode. Furthermore, in a direction parallel to the plane of the display panel, the first touch electrode is located between the incident path and the second pixel.

[0011] The second aspect of this application provides a display device with privacy protection, including a display panel as provided in any of the first aspects of this application.

[0012] The beneficial effects that this application can achieve are:

[0013] This embodiment of the application positions the first touch electrode horizontally in the area between the incident light path of the privacy pixel and the adjacent non-privacy pixel, ensuring that the incident light from the privacy pixel towards the bottom of the light-blocking block does not spatially overlap with the first touch electrode throughout its entire propagation path. Compared with the prior art, the display panel provided by this embodiment eliminates the light leakage problem caused by light being reflected from the touch electrode to the common electrode and then from the common electrode to the non-privacy pixel, thereby improving the privacy performance of the display panel at wide viewing angles. Attached Figure Description

[0014] Figure 1 A schematic cross-sectional view of an optional display panel provided in an embodiment of this application is shown; wherein, in this embodiment, by changing the position of the first touch electrode, the incident path of the first incident light does not pass through the first touch electrode;

[0015] Figure 2 A schematic cross-sectional view of an optional display panel provided in an embodiment of this application is shown; wherein, in this embodiment, the first touch electrode is made of a transparent material, and by changing the position of the first touch electrode, the incident path of the first incident light does not pass through the first touch electrode;

[0016] Figure 3 A schematic cross-sectional view of an optional display panel according to an embodiment of this application is shown; wherein, in this embodiment, the structure of the display panel is the same as that of the prior art, and the first touch electrode is made of a transparent material;

[0017] Figure 4 A cross-sectional structural schematic diagram of a display panel with a light-absorbing layer provided in an embodiment of this application is shown; wherein, in this embodiment, by changing the position of the first touch electrode, the incident path of the first incident light does not pass through the first touch electrode;

[0018] Figure 5 This illustration shows a cross-sectional structural diagram of an optional display panel with a light-absorbing layer according to an embodiment of this application;

[0019] Figure 6 This illustration shows a cross-sectional structural diagram of an optional display panel with touch layers on both sides of the privacy layer, according to an embodiment of this application.

[0020] Figure 7 This illustration shows a cross-sectional view of a display panel with an optional privacy layer disposed on the side of the first touch layer near the pixel layer, according to an embodiment of this application.

[0021] Figure 8 This illustration shows an optional optical path diagram of a second pixel in a shared mode, provided by an embodiment of this application.

[0022] Figure 9 A schematic diagram of the cross-sectional structure of a privacy display panel in the prior art is shown;

[0023] Figure 10 A schematic diagram of an optional display device with privacy protection provided in an embodiment of this application is shown.

[0024] Figure label:

[0025] 1: Pixel layer, 11: First pixel, 111: First emitted light, 112: Second emitted light, 12: Second pixel, 121: Third emitted light, 122: Fourth emitted light, 13: Common electrode, 14: Electroluminescent layer, 15: Anode, 16: Pixel definition layer;

[0026] 2: First touch layer; 21: First touch electrode;

[0027] 3: Privacy shield; 31: Light blocking block;

[0028] 4: Light-absorbing layer;

[0029] 5: Second touch layer; 51: Second touch electrode;

[0030] 6: Encapsulation layer;

[0031] 7: Display panel;

[0032] 8: Display device. Detailed Implementation

[0033] In the following description, exemplary embodiments will be illustrated in more detail with reference to the accompanying drawings, wherein the same reference numerals denote the same elements throughout the drawings. However, this application may be embodied in a variety of different forms and should not be considered as limited to the embodiments shown herein. Rather, these embodiments are provided as examples so that this application will be sufficient and complete, and will fully convey aspects and features of the invention to those skilled in the art. Therefore, processes, elements, and techniques that are not essential for a complete understanding of the aspects and features of the invention may not be described to those skilled in the art. Unless otherwise stated, the same reference numerals denote the same elements throughout the drawings and written description, and therefore their description will not be repeated. In the drawings, the relative dimensions of elements, layers, and regions may be exaggerated for clarity.

[0034] It will be understood that while the terms “first,” “second,” etc., may be used herein to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms.

[0035] It will be understood that when an element or layer is referred to as being “between” two elements or two layers, it can be the only element or the only layer between the two elements or two layers, or there can be one or more intermediate elements or intermediate layers.

[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless otherwise expressly stated. It will be further understood that, when used in this specification, the terms “comprising” and “including” indicate the presence of stated features, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, operations, elements, components, and / or groups thereof.

[0037] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0038] like Figure 1 As shown, the first aspect of this application provides a display panel 7, which includes a pixel layer 1, a first touch layer 2 and a privacy layer 3 from bottom to top along a direction perpendicular to the display panel 7.

[0039] In some embodiments, such as Figure 1As shown, pixel layer 1 includes a first pixel 11, a second pixel 12, and a common electrode 13. The first pixel 11 and the second pixel 12 are light-emitting units. In one embodiment, when the display panel 7 is in a privacy-protected state, the first pixel 11 is used to display privacy-protected content, and the second pixel 12 is either in a privacy-protected state or in a closed state.

[0040] In some embodiments, such as Figure 1 As shown, the common electrode 13 is typically a cathode that covers the entire surface of the electroluminescent (EL) layer 14, and simultaneously provides a current loop for the first pixel 11 and the second pixel 12.

[0041] In some embodiments, pixel layer 1 further includes film structures such as anode 15 and pixel definition layer 16. Pixel definition layer 16 has multiple pixel openings, and the first pixel 11 and the second pixel 12 fall within these pixel openings. Electroluminescent layer 14 is sandwiched between anode 15 and common electrode 13, and is responsible for emitting light under the drive of an electric field.

[0042] In some embodiments, the first touch layer 2 is disposed on the light-emitting side of the pixel layer 1, that is, above the common electrode 13, and includes a plurality of first touch electrodes 21. These touch electrodes are used to sense the user's touch position to realize touch interaction function.

[0043] In some embodiments, such as Figure 1 As shown, the privacy layer 3 is disposed on the side of the first touch layer 2 opposite to the pixel layer 1, that is, above the first touch layer 2. The privacy layer 3 includes a plurality of light-blocking blocks 31 arranged at intervals along a direction parallel to the plane of the display panel 7, with openings between adjacent light-blocking blocks 31. In a preferred embodiment, as... Figure 1 As shown, when the display panel 7 is in privacy mode, the first pixel 11 is a privacy pixel, and the second pixel 12 is a regular pixel. The opening area between adjacent light-blocking blocks 31 near the left side of the figure corresponds to the light emission channel of the first pixel 11 (privacy pixel). The width of this opening area parallel to the direction of the display panel 7 is approximately equal to the width of the pixel opening of the first pixel 11, thus limiting the emission angle of the emitted light. That is, emitted light with a wide viewing angle can be blocked by the light-blocking block 31, while emitted light perpendicular to the direction of the display panel 7 can pass through the gap between adjacent light-blocking blocks 31 and reach the user's eye. The opening area between adjacent light-blocking blocks 31 near the right side of the figure corresponds to the light emission channel of the second pixel 12 (regular pixel). The width of this opening area parallel to the direction of the display panel 7 is greater than the width of the pixel opening of the second pixel 12, so that emitted light from all directions can exit from the opening area and reach the user's eye.

[0044] In this embodiment, the spatial relationship between the first touch electrode 21 and the emitted light path of the first pixel 11 is key to solving the light leakage problem. For example... Figure 1 As shown, the first pixel 11 used to display the image has a first emitted light 111. The first emitted light 111 has a wide viewing angle and can be incident on the surface of the light-blocking block 31 near the pixel layer 1, forming an incident point on that surface. In this embodiment, the position of the first touch electrode 21 in the first touch layer 2 is designed so that the optical path from the emission point of the first emitted light 111 to this incident point can completely avoid the first touch electrode 21 in space, with no overlap. In other words, in a direction parallel to the display panel 7, the first touch electrode 21 is arranged in the area between this optical path and the second pixel 12, so that the first emitted light 111 does not pass through the first touch electrode 21 before reaching the light-blocking block 31. This avoids the risk of light leakage caused by the first emitted light 111 being reflected by the first touch electrode 21 to the common electrode 13, and then reflected by the common electrode 13 to the opening area between the adjacent light-blocking blocks 31 corresponding to the second pixel 12, thus improving the privacy protection effect of the display panel.

[0045] Furthermore, the design described above, which avoids the first emitted light 111 by spatially misaligning the first touch electrode 21 and the light-blocking block 31, means that the display panel 7 does not need to add a new film layer, nor does it rely on special materials to be remade or additional patterning processes. It has minimal impact on the touch performance and process compatibility of existing display panels and is easier to implement in manufacturing processes.

[0046] In some embodiments, see continue to see Figure 1 To more reliably prevent the first touch electrode 21 from overlapping, a preset distance is provided between the first touch electrode 21 and the pixel opening edge of the first pixel 11 in a direction parallel to the plane of the display panel 7. This preset distance ensures that the incident path of the first emitted light 111 does not overlap with the first touch electrode 21. Preferably, the minimum value of the preset distance is the distance between the pixel opening edge of the first pixel 11 near the corresponding light-blocking block 31 and the end of the corresponding first touch electrode 21 near the first pixel 11. This distance ensures that all the first emitted light 111 emitted by the first pixel 11 cannot illuminate the first touch electrode 21.

[0047] Preferably, the preset spacing satisfies the following relationship:

[0048] m > t + i;

[0049] Where m is the preset spacing, t is the distance between the emission point and the incident point in the direction parallel to the plane of the display panel 7 when the first emitted light 111 is incident from the emission point to the incident point, and i is the design margin, that is, the safety distance designed in order to ensure that the incident path of the first emitted light 111 does not overlap with the first touch electrode 21. The value of i depends on the actual capability of the factory when performing photolithography alignment.

[0050] Furthermore, the distance t between the emission point and the incident point in the direction parallel to the plane of the display panel 7 satisfies:

[0051] t≈h*tanβ;

[0052] Where t is the distance between the emission point and the incident point in the direction parallel to the plane of the display panel 7, h is the distance between the first pixel 11 and the privacy layer 3 in the direction perpendicular to the plane of the display panel 7, and β is the emission angle of the first emitted light 111.

[0053] The above-mentioned quantitative design method aims to directly calculate the specific position of the first touch electrode 21 during the design stage, ensuring that the first emitted light 111 and the first touch electrode 21 do not overlap without repeated experiments, thereby further improving the design efficiency of the display panel and simplifying the manufacturing process.

[0054] In some embodiments, such as Figure 2 As shown, based on the above-mentioned scheme of preventing the first emitted light 111 from overlapping with the first touch electrode 21 by changing the position of the first touch electrode 21, the first touch electrode 21 can also be made of a light-transmitting material. In actual production, due to factors such as process fluctuations, alignment deviations, or material deformation, the actual position of the first touch electrode 21 may deviate from the calculated value, resulting in some of the first emitted light 111 still being able to irradiate the first touch electrode 21. In this embodiment, the first touch electrode 21 is made of a light-transmitting material, which allows some of the first emitted light 111 irradiating the first touch electrode 21 to directly pass through the first touch electrode 21 and enter the light-blocking block 31. This also prevents the first emitted light 111 from being reflected by the first touch electrode 21 to the pixel layer 1 and blocked by the light-blocking block 31, preventing it from escaping to the outside world and further ensuring the reliability of the privacy function. This combination scheme of "spatial misalignment as the main method and transparent electrode as the auxiliary method" combines two methods of preventing light leakage, achieving double protection, and is suitable for products with particularly strict requirements for privacy performance. Preferably, the light transmittance of the transparent material is greater than 90%. It should be understood that the higher the light transmittance, the lower the reflectivity, and the better the light leakage prevention effect. Common transparent electrode materials include transparent conductive oxides such as indium tin oxide and indium zinc oxide, which, while meeting the conductivity requirements of touch control, also have good visible light transmittance.

[0055] In other embodiments, the problem of light leakage due to reflection can be addressed by improving the material of the touch electrodes themselves, building upon the existing display panel structure. See also Figure 3 In this embodiment, the first touch electrode 21 is made of a transparent material so that most of the first emitted light 111 incident on the first touch electrode 21 can pass directly through the first touch electrode 21 instead of being reflected back by it. In this embodiment, using a transparent first touch electrode 21 does not add an extra film layer or change the vertical relationship between the functional layers. It has good compatibility with existing touch processes and does not require additional photolithography or etching steps, making it particularly suitable for products sensitive to film thickness and process complexity. Preferably, the transmittance of the transparent material is greater than 90% to ensure sufficiently low reflectivity.

[0056] In some embodiments, based on the above-described scheme of preventing the first emitted light 111 from overlapping with the first touch electrode 21 by changing the position of the first touch electrode 21, the display panel 7 is further provided with a light-absorbing layer 4. For example... Figure 4 As shown, the light-absorbing layer 4 is disposed on the side of the first touch layer 2 near the pixel layer 1, and / or on the side of the common electrode 13 near the first touch layer 2. In this embodiment, the function of the light-absorbing layer 4 is to absorb the minute amount of light leakage caused by process fluctuations, so it will not form effective reflection. This is equivalent to adding another layer of absorption and interception on the basis of the spatial misalignment scheme, further increasing the reliability of the privacy function.

[0057] In other embodiments, the light leakage problem can be solved by directly setting a light-absorbing layer 4 on the side of the first touch layer 2 near the pixel layer 1 and / or on the side of the common electrode 13 near the first touch layer 2, without changing the layout and material of the touch electrodes, based on the existing display panel structure. See also Figure 5 The light-absorbing layer 4 is used to absorb the first emitted light 111. When the light-absorbing layer 4 is located below the first touch layer 2, the first emitted light 111 is absorbed before reaching the first touch electrode 21 and cannot be reflected by the touch electrode. When the light-absorbing layer 4 is located above the common electrode 13, even if a small amount of light is reflected back from the first touch electrode 21, it will be absorbed before reaching the common electrode 13, preventing secondary reflection. When both layers are located simultaneously, the light-absorbing layer 4 below the first touch electrode 21 is responsible for the first layer of interception, and the light-absorbing layer 4 above the common electrode 13 is responsible for the second layer of interception. The upper and lower light-absorbing layers 4 form a double absorption, making the privacy protection effect of the display panel better.

[0058] Preferably, the material of the light-absorbing layer 4 is a material with a light absorption rate greater than 70%, such as a black resin containing carbon black, a dark organic polymer, or a dark inorganic film. In some embodiments, the light-absorbing layer 4 can be patterned in the required area by a metal mask or photolithography to ensure that the normal light-emitting channel is not blocked and the display brightness of the display panel is not affected.

[0059] In some embodiments, such as Figure 6 As shown, the display panel 7 also includes a second touch layer 5, which is located on the side of the privacy layer 3 opposite to the pixel layer 1. That is, the privacy layer 3 is sandwiched between the first touch layer 2 and the second touch layer 5, and the touch layer as a whole adopts a double-layer structure.

[0060] According to the above embodiment, the second touch layer 5 includes a plurality of second touch electrodes 51, and the first touch electrode 21 and the second touch electrode 51 are electrically connected through a conductive channel. Preferably, the electrical connection is located at the edge region of the privacy layer 3, so as not to affect the light path of the display area. After the first touch electrode 21 and the second touch electrode 51 are connected in parallel, the overall resistance is reduced, improving the touch response speed and touch accuracy. From the perspective of preventing light leakage, since the second touch layer 5 is located above the privacy layer 3, the first emitted light 111 has been processed by the privacy layer 3 before reaching the light blocking block 31, and will not irradiate the second touch electrode 51. The first touch electrode 21 can still be arranged in the aforementioned scheme where the first emitted light 111 and the first touch electrode 21 do not overlap, so that it is not on the incident path, thereby not affecting the privacy effect of the display panel.

[0061] In some embodiments, the thickness of the light-blocking block 31 in the direction perpendicular to the plane of the display panel 7 is greater than the thickness of the second touch electrode 51, so that the projection of the light-blocking block 31 in the direction of the first emitted light 111 completely covers the projection of the second touch electrode 51. In this way, light emitted from the first pixel 11 at a large angle is blocked by the side of the light-blocking block 31 before reaching the second touch electrode 51, preventing it from directly illuminating the second touch electrode 51 and thus avoiding reflected light leakage. In one specific embodiment, the taller the light-blocking block 31, the larger the area it can shield, and the more reliable the light leakage prevention effect. Furthermore, a thicker light-blocking block 31 can better limit the emission of large-angle light and physically block stray light between film layers, further reducing the probability of non-peeping pixels receiving light leakage.

[0062] In some embodiments, the projection of the light-blocking block 31 onto the second touch layer 5 covers the first touch electrode 21 and / or the second touch electrode 51. In this embodiment, the above design allows the light-blocking block 31 to spatially shield the first touch electrode 21 and the second touch electrode 51. When the first emitted light 111 is emitted from the first pixel 11, the light-blocking block 31 not only blocks the light beam toward the viewer's side but also covers the second touch electrode 51, preventing the first emitted light 111 from illuminating the second touch electrode 51 and thus preventing it from being reflected by the second touch electrode 51.

[0063] In some embodiments, the scheme in which the height of the light-blocking block 31 is greater than the thickness of the touch electrode can be used in conjunction with the scheme in which the projection of the light-blocking block 31 covers the second touch electrode 51. The height relationship between the light-blocking block 31 and the touch electrode ensures that the first emitted light 111 is blocked in the direction perpendicular to the display panel 7, and the projection relationship between the light-blocking block 31 and the touch electrode ensures that the first emitted light 111 is blocked in the direction parallel to the display panel 7.

[0064] In some embodiments, an insulating layer is provided between the first touch layer 2 and / or the second touch layer 5 and the privacy layer 3, and the first touch electrode 21 and / or the second touch electrode 51 are electrically connected through vias penetrating the insulating layer. In this embodiment, the privacy layer 3 is typically made of an insulating material, which itself can prevent accidental short circuits and signal crosstalk between the first touch electrode 21 and the second touch electrode 51. The insulating layer mainly serves to provide a flat bearing surface or to protect the first touch electrode 21 and / or the second touch electrode 51. The vias are vertical conductive channels opened in the insulating layer, allowing the electrodes or conductive structures on the upper and lower sides to connect, ensuring the electrical connection of the dual-layer touch without affecting the optical path and privacy effect of the display area.

[0065] In some embodiments, such as Figure 7 As shown, the first touch layer 2 can also be disposed on the side of the privacy layer 3 facing away from the pixel layer 1, and the orthogonal projection of the light-blocking block 31 on the pixel layer 1 covers the orthogonal projection of the first touch electrode 21 on the pixel layer 1. That is, in this embodiment, the privacy layer 3 is below and the first touch layer 2 is above, and its film layer stacking design is exactly the opposite of the structure of the aforementioned display panel. That is, after the first emitted light 111 is emitted from the first pixel 11, it first reaches the privacy layer 3 and is then blocked by the light-blocking block 31. Since the size of the light-blocking block 31 is large enough to cover the projection of the first touch electrode 21 on the pixel layer 1, the first emitted light 111 is blocked by the light-blocking block 31 before it reaches the first touch electrode 21. The first emitted light 111 cannot illuminate the touch electrode, so there will be no reflected light leakage.

[0066] In this embodiment, the above design does not require precise calculation and definition of the horizontal distance between the first touch electrode 21 and the pixel opening as in the previous scheme. It is only necessary to ensure that the light-blocking block 31 covers the first touch electrode 21 in both the vertical and horizontal directions, thus simplifying the design process and manufacturing process. At the same time, placing the first touch layer 2 above the privacy layer 3 brings the first touch layer 2 closer to the finger, thereby further improving the touch performance of the display panel.

[0067] In some embodiments, such as Figures 1 to 8 As shown, pixel layer 1 also includes an electroluminescent layer 14, disposed on the side of the common electrode 13 opposite to the first touch layer 2. It should be understood that the electroluminescent layer 14 is the light source for the first pixel 11 and the second pixel 12, and is driven to emit light by the anode 15 and the common electrode 13. It is disposed below the common electrode 13 to conform to the conventional film layer sequence design of OLEDs.

[0068] In some embodiments, such as Figures 1 to 8 As shown, the display panel also includes an encapsulation layer 6, disposed between the pixel layer 1 and the first touch layer 2. In this embodiment, the function of the encapsulation layer 6 is to protect the underlying electroluminescent layer 14 and the common electrode 13, prevent water and oxygen corrosion, and extend the service life of the display panel. It should be noted that placing the encapsulation layer 6 between the pixel layer 1 and the first touch layer 2 is a natural choice under conventional architecture, with mature manufacturing processes, and does not affect the touch performance and privacy protection function of the display panel.

[0069] In some embodiments, the display panel 7 further includes a driving array and a substrate (not shown) located on the side of the pixel layer 1 opposite to the encapsulation layer 6. The driving array includes a pixel driving circuit located in the display area and a peripheral driving circuit located in the peripheral non-display area. For example, the pixel driving circuit can be connected to the first pixel 11 and the second pixel 12 respectively, and is used to drive the first pixel 11 and the second pixel 12 to emit light under the control of the peripheral driving circuit. The substrate is located on the side of the driving array opposite to the pixel layer 1 and is used to support and protect the driving array and the film layers such as the pixel layer 1.

[0070] In some embodiments, such as Figures 1 to 8 As shown, the encapsulation layer 6 covers the common electrode 13 and is located between the common electrode 13 and the first touch layer 2. The encapsulation layer 6 completely covers the common electrode 13, providing comprehensive protection and preventing damage to the common electrode 13 during the subsequent fabrication of the first touch layer 2. Simultaneously, the presence of the encapsulation layer 6 also provides a certain degree of optical planarization, reducing stray reflections between film interfaces and indirectly contributing to the stability of the privacy protection effect.

[0071] It should be noted that the light leakage prevention solutions described in the above embodiments, including but not limited to spatial misalignment, transparent electrodes, light-absorbing layers, dual-layer touch control, and inverted architecture, can be arbitrarily combined and used according to the actual product design requirements and process conditions. For example, spatial misalignment can be paired with transparent electrodes, light-absorbing layers can be paired with inverted architecture, or dual-layer touch control can be combined with both transparent electrodes and light-absorbing layers; all are feasible. As long as the combination does not interfere with each other or affect the normal display and touch functions of the display panel, it will not deviate from the protection scope of this application. Different combinations have different focuses in terms of privacy protection, touch performance, and process complexity. During production, the most suitable solution can be flexibly selected according to the specific vehicle model, cost budget, and performance indicators.

[0072] The working process of the display panel with privacy function provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0073] The display panel 7 provided in this application embodiment has two working modes: privacy mode and sharing mode. These two modes are switched by controlling the light emission state of the first pixel 11 and the second pixel 12.

[0074] Among them, such as Figure 3 , Figures 5 to 7 As shown, in privacy mode, the first pixel 11 is used to emit light and display images, while the second pixel 12 is in an off state. The light emitted by the first pixel 11 is divided into two parts: one part is the first emitted light 111 emitted at a large angle, and the other part is the second emitted light 112 emitted in a direction perpendicular to the plane of the display panel 7.

[0075] In this embodiment, after the first emitted light 111 passes through the first touch layer 2, it is ultimately blocked by the side or bottom surface (the side surface closest to the pixel layer 1) of the light-blocking block 31. When a user in a wide viewing angle observes the display screen from the side, the first emitted light 111 cannot be emitted to the outside, so the user cannot see the displayed content. The second emitted light 112 is emitted from the opening between adjacent light-blocking blocks 31 along a direction perpendicular to the display panel 7 and reaches the eye of the user looking directly at the display screen, thereby achieving the privacy protection effect of the display panel.

[0076] In shared mode, such as Figure 8As shown, the first pixel 11 and the second pixel 12 emit light simultaneously. The light emitted by the second pixel 12 includes a third emitted light 121 and a fourth emitted light 122. The fourth emitted light 122 is emitted along a direction perpendicular to the display panel 7, while the third emitted light 121 refers to emitted light at other angles, i.e., emitted light at angles different from the emission direction of the fourth emitted light 122. In this embodiment, both the third emitted light 121 and the fourth emitted light 122 can be successfully emitted to the outside without being restricted by the light-blocking block 31. At this time, the viewing angle of the screen becomes wider, and the displayed content can be seen from various angles, which is suitable for scenarios where multiple people watch together.

[0077] In this embodiment, the switching between the two modes can be achieved through a control circuit, allowing for flexible switching between the privacy mode and the sharing mode according to actual usage needs. For example, when the driver is driving, the privacy mode can be activated so that the content seen by the passenger is not noticed by the driver. Alternatively, when the vehicle is parked and resting, the sharing mode can be switched so that everyone in the vehicle can view the content normally.

[0078] The second aspect of this application provides a display device 8 with privacy protection function, such as... Figure 10 As shown, it includes a display panel 7 as provided in any of the first aspects of the embodiments of this application. The display device 8 provided in the embodiments of this application can be... Figure 10 The vehicle display shown can also be any electronic product with display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, medical devices, industrial control equipment, touch interactive terminals, etc. This application embodiment does not make any special limitation on this.

[0079] The above description of this application is illustrative and is not limited thereto. The accompanying drawings are only one embodiment of this application. If researchers in the art propose a similar structural form without departing from the spirit of this application, it shall fall within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: The pixel layer includes the first pixel, the second pixel, and the common electrode; The first touch layer includes a plurality of first touch electrodes, which are disposed on the light-emitting side of the pixel layer; A privacy layer, comprising multiple light-blocking blocks, is disposed on the side of the first touch layer opposite to the pixel layer; The first pixel has a first emitted light, which is incident on the incident point of the light-blocking block near the pixel layer. The incident path of the first emitted light from the first pixel to the incident point does not overlap with the first touch electrode. In a direction parallel to the plane of the display panel, the first touch electrode is located between the incident path and the second pixel.

2. The display panel according to claim 1, characterized in that, In a direction parallel to the plane of the display panel, there is a preset distance between the first touch electrode and the pixel opening edge of the first pixel, the preset distance ensuring that the incident path does not overlap with the first touch electrode.

3. The display panel according to claim 2, characterized in that, The preset spacing satisfies: m > t + i; Where m is the preset spacing, t is the distance between the emission point and the incident point in the direction parallel to the plane of the display panel when the first emitted light is incident from the emission point to the incident point, and i is the design margin.

4. The display panel according to claim 3, characterized in that, The distance between the emission point and the incident point in a direction parallel to the plane of the display panel satisfies: t≈h*tanβ; Where t is the distance between the emission point and the incident point in the direction parallel to the plane of the display panel, h is the distance between the first pixel and the privacy layer in the direction perpendicular to the plane of the display panel, and β is the emission angle of the first emitted light.

5. The display panel according to any one of claims 1 to 4, characterized in that, The first touch electrode is made of a light-transmitting material.

6. The display panel according to claim 5, characterized in that, The light transmittance of the light-transmitting material is greater than 90%.

7. The display panel according to any one of claims 1 to 4, characterized in that, It also includes a light-absorbing layer disposed on the side of the first touch layer near the pixel layer, and / or disposed on the side of the common electrode near the first touch layer.

8. The display panel according to claim 7, characterized in that, The absorbance of the light-absorbing layer is greater than 70%.

9. The display panel according to any one of claims 1 to 4, characterized in that, The display panel has a privacy mode. In the privacy mode, the first pixel has a first emitted light and a second emitted light. The first emitted light passes through the first touch layer and is blocked by the light-blocking block. The second emitted light is emitted from the opening between adjacent light-blocking blocks. The second emitted light is emitted along a direction perpendicular to the plane of the display panel.

10. The display panel according to claim 9, characterized in that, The display panel also has a sharing mode, in which the second pixel has a third emitted light and a fourth emitted light, both of which can be emitted to the outside; wherein, the fourth emitted light is emitted along a direction perpendicular to the plane of the display panel, and the third emitted light is emitted at an angle different from the emission direction of the fourth emitted light.

11. The display panel according to any one of claims 1 to 4, characterized in that, It also includes a second touch layer, which is located on the side of the privacy layer opposite to the pixel layer; The second touch layer includes a plurality of second touch electrodes, and the first touch electrodes and the second touch electrodes are electrically connected.

12. The display panel according to claim 11, characterized in that, The first touch electrode and the second touch electrode are connected through a conductive channel in the edge region of the privacy layer.

13. The display panel according to claim 11, characterized in that, The height of the light-blocking block in the direction perpendicular to the plane of the display panel is greater than the thickness of the first touch electrode and / or the second touch electrode.

14. The display panel according to claim 11, characterized in that, The projection of the light-blocking block on the first touch layer covers the first touch electrode, and the projection of the light-blocking block on the second touch layer covers the second touch electrode.

15. The display panel according to claim 11, characterized in that, An insulating layer is provided between the first touch layer and / or the second touch layer and the privacy layer, and the first touch electrode and the second touch electrode are connected through a through-hole penetrating the insulating layer.

16. The display panel according to claim 1, characterized in that, The pixel layer also includes an electroluminescent layer disposed on the side of the common electrode opposite to the first touch layer.

17. The display panel according to claim 1, characterized in that, It also includes an encapsulation layer disposed between the pixel layer and the first touch layer.

18. A display device with privacy protection function, characterized in that, The display panel includes any one of claims 1 to 17.

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