Display panel, driving method and preparation method thereof and display device

Abstract

The invention discloses a display panel, a driving method and a preparation method thereof, and a display device, and belongs to the technical field of display. A plurality of sub-pixels comprising peep-proof units and non-peep-proof units are arranged in the display panel, and the display panel comprises an array substrate on which a plurality of pixel circuits corresponding to the sub-pixels are formed; the light-emitting device layer is located on one side of the array substrate and comprises a plurality of light-emitting devices; the light-emitting device comprises a first light-emitting device corresponding to the peep-proof unit and a second light-emitting device corresponding to the non-peep-proof unit; the light shielding layer is located on the side, away from the array substrate, of the light emitting device layer and comprises a light shielding structure arranged around at least part of the structure of the first light emitting device; the light blocking structures are arranged on part of light paths of the corresponding first light emitting devices; the pixel circuit drives the first light-emitting device to work and turns off the second light-emitting device in the peep-proof display mode, and drives the first light-emitting device and the second light-emitting device to work in the normal display mode. According to the invention, the display panel can support dynamic peep prevention.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel, a driving method and a manufacturing method thereof, and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display technology is considered the most promising new display technology for the next generation. Compared with liquid crystal display technology, OLED display technology has advantages such as low energy consumption, low cost, self-luminescence, wide viewing angle, and fast response speed.

[0003] Traditionally, pixel patterning is achieved using a fine metal mask (FMM) during the production of OLED display panels. FMM technology is mature and boasts extensive mass production experience. However, it also suffers from limitations such as limited precision and high cost. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-scale scalability, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, and CN118781966A describe FMM-free technology for reference.

[0004] However, the performance of current OLED display products still needs to be improved. Summary of the Invention

[0005] The present invention provides a display panel, a driving method and a manufacturing method thereof, and a display device, so that the display panel can support dynamic switching between anti-peeping and non-anti-peeping modes, thereby improving the performance of the display panel.

[0006] In a first aspect, an embodiment of the present invention provides a display panel including a plurality of sub-pixels, wherein the sub-pixels include an anti-peeping unit and a non-anti-peeping unit. The display panel includes: An array substrate having a plurality of pixel circuits corresponding to the sub-pixels formed therein; a light emitting device layer, disposed on one side of the array substrate, comprising a plurality of light emitting devices; the light emitting devices comprising a first light emitting device corresponding to the anti-peeping unit and a second light emitting device corresponding to the non-anti-peeping unit; a light shielding layer disposed on a side of the light emitting device layer away from the array substrate; the light shielding layer comprising a light shielding structure disposed around at least a portion of the structure of the first light emitting device; the light shielding structure being disposed on a portion of the light path corresponding to the first light emitting device; The pixel circuit drives the first light emitting device to operate and turns off the second light emitting device in the anti-peeping display mode, and drives the first light emitting device and the second light emitting device to operate in the normal display mode.

[0007] Optionally, the light-blocking structure encloses a light-transmitting hole, the orthographic projection of the light-blocking structure on the array substrate surrounds the orthographic projection of the corresponding first light-emitting device on the array substrate, and the orthographic projection of the light-transmitting hole on the array substrate overlaps with the orthographic projection of the first light-emitting device on the array substrate.

[0008] Optionally, angles between each light ray emitted from the light emitting surface by the first light emitting device through the light-transmitting hole of the display panel and a normal line of the light emitting surface are all less than or equal to a preset angle.

[0009] Optionally, the preset angle is less than or equal to 45°.

[0010] Optionally, the light shielding layer further includes: a black matrix structure arranged around each of the second light emitting devices; wherein the orthographic projection of the black matrix structure on the array substrate does not overlap with the orthographic projection of the second light emitting device on the array substrate.

[0011] Optionally, the pixel circuit includes a pixel driving module, a first output end connected to the pixel driving module, a switch module, and a second output end connected to the pixel driving module through the switch module; the first output end is connected to the first light-emitting device, and the second output end is connected to the second light-emitting device; the switch module is used to turn off in the anti-peeping display mode and turn on in the normal display mode.

[0012] Optionally, the switch module includes: a control end, a switch module input end connected to the first output end, and a switch module output end connected to the second output end; the control end transmits the cutoff potential of the switch module in the anti-peeping display mode, and transmits the on-potential of the switch module in the normal display mode.

[0013] Optionally, the switch module includes: a first transistor; a gate of the first transistor is connected to the control end, a first electrode of the first transistor is connected to the first output end, and a second electrode of the first transistor is connected to the second output end.

[0014] Optionally, the pixel driving module includes a plurality of transistors, and the first transistor has the same channel type as at least some transistors in the pixel driving module.

[0015] Optionally, the pixel driving module includes: driver transistor; a first initialization transistor connected to the gate of the driving transistor and receiving a first scanning signal and a first initialization signal; a data writing transistor connected to the first electrode of the driving transistor and receiving a data voltage and a second scanning signal; a threshold compensation transistor connected between the gate electrode and the second electrode of the driving transistor and receiving the second scanning signal; a first light-emitting control transistor connected to the first electrode of the driving transistor and connected to a first power supply voltage and a light-emitting control signal; a second light-emitting control transistor connected between the second electrode of the driving transistor and the first output terminal and receiving the light-emitting control signal; a second initialization transistor connected to the first output terminal and receiving a third scanning signal and a second initialization signal; a third initialization transistor connected to the first electrode or the second electrode of the driving transistor and receiving the third scanning signal and the third initialization signal; A storage capacitor is connected to the gate of the driving transistor and is connected to the first power supply voltage.

[0016] Optionally, the display panel further includes: an isolation structure, disposed between the array substrate and the light shielding layer, and the isolation structure encloses a plurality of isolation openings; Wherein, each of the light-emitting devices is at least partially disposed in the corresponding isolation opening.

[0017] Optionally, the display panel further includes: an encapsulation layer, disposed between the light-emitting device layer and the light-shielding layer, and covering the isolation structure; The encapsulation layer includes: a first encapsulation layer comprising a plurality of encapsulation portions corresponding one to each of the light-emitting devices, the encapsulation portions being arranged on a side of the corresponding light-emitting device away from the array substrate and extending through a sidewall of the isolation structure to a side of the isolation structure away from the array substrate; a second packaging layer, provided on a side of the first packaging layer away from the array substrate, covering the isolation structure and each of the packaging parts; The third encapsulation layer is arranged on a side of the second encapsulation layer away from the array substrate, covering the second encapsulation layer; wherein the light shielding layer is arranged on a side of the third encapsulation layer away from the array substrate.

[0018] Optionally, the isolation structure includes an isolation portion and a blocking portion stacked in a direction away from the array substrate; the blocking portion has a width greater than that of the isolation portion, and an orthographic projection of the isolation portion on the array substrate is located within an orthographic projection of the blocking portion on the array substrate; The isolation structure further includes a base portion located on a side of the isolation portion close to the array substrate, the base portion being protruding relative to the isolation portion in a direction toward the isolation opening, and an orthographic projection of the isolation portion on the array substrate being located within an orthographic projection of the base portion on the array substrate; The display panel further includes: a pixel defining layer disposed between the isolation structure and the array substrate; the pixel defining layer is provided with a plurality of pixel openings respectively connected to the isolation openings, and each of the light-emitting devices is at least partially disposed in each of the pixel openings; The light emitting device comprises: an anode, a light emitting structure and a cathode stacked in a direction away from the array substrate; the anode is connected to the pixel circuit in the sub-pixel where it is located.

[0019] In a second aspect, an embodiment of the present invention further provides a method for driving a display panel, wherein a plurality of sub-pixels are provided in the display panel, the sub-pixels including an anti-peeping unit and a non-anti-peeping unit, the display panel including an array substrate, a light-emitting device layer and a light-shielding layer stacked in sequence; a plurality of pixel circuits corresponding to the sub-pixels are formed in the array substrate; the light-emitting device layer includes a plurality of light-emitting devices; the light-emitting devices include a first light-emitting device corresponding to the anti-peeping unit and a second light-emitting device corresponding to the non-anti-peeping unit; the light-shielding layer includes a light-blocking structure arranged around at least a portion of the structure of the first light-emitting device; the light-blocking structure is arranged on a portion of the light path corresponding to the first light-emitting device; the pixel circuit includes a pixel driving module and a switch module; the first light-emitting device is connected to the pixel driving module; the switch module includes a control end, a switch module input end connected to the pixel driving module and a switch module output end connected to the second light-emitting device; The driving method of the display panel includes: In Privacy Display mode: Controlling the control end to transmit the cutoff potential of the switch module so that each of the switch modules is turned off; controlling the pixel driving modules in each of the sub-pixels to output a driving current to drive each of the first light-emitting devices to operate; In normal display mode: Controlling the control end to transmit the conduction potential of the switch module so that each of the switch modules is turned on; The pixel driving modules in each of the sub-pixels are controlled to output a driving current to drive each of the first light-emitting devices and each of the second light-emitting devices to operate.

[0020] In a third aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, wherein the display panel is provided with a plurality of sub-pixels, each of which includes an anti-peeping unit and a non-anti-peeping unit. The method for manufacturing the display panel includes: An array substrate is provided; a plurality of pixel circuits corresponding to the sub-pixels are formed in the array substrate; An isolation structure is formed on one side of the array substrate; wherein the isolation structure encloses a plurality of isolation openings; A light-emitting device layer is formed on one side of the array substrate; wherein the light-emitting device layer includes a plurality of light-emitting devices, each of which is at least partially disposed in a corresponding isolation opening; the light-emitting devices include a first light-emitting device corresponding to the privacy protection unit and a second light-emitting device corresponding to the non-privacy protection unit; forming an encapsulation layer on a side of the light-emitting device layer away from the array substrate; wherein the encapsulation layer covers each of the light-emitting devices and the isolation structure; A light-shielding layer is formed on a side of the encapsulation layer away from the array substrate; wherein the light-shielding layer includes a light-blocking structure arranged around at least a portion of the structure of the first light-emitting device; the light-blocking structure is arranged on a portion of the light path corresponding to the first light-emitting device; wherein the pixel circuit drives the first light-emitting device to operate and turns off the second light-emitting device in the anti-peep display mode, and drives the first light-emitting device and the second light-emitting device to operate in the normal display mode.

[0021] In a fourth aspect, an embodiment of the present invention further provides a display device, comprising: the display panel provided by any embodiment of the present invention.

[0022] The display panel provided by the embodiment of the present invention is provided with multiple sub-pixels including anti-peeping units and non-anti-peeping units. A first light-emitting device corresponding to the anti-peeping unit and a second light-emitting device corresponding to the non-anti-peeping unit are provided in the light-emitting device layer, which is equivalent to dividing the original light-emitting device in the sub-pixel into two light-emitting devices, so that the two light-emitting devices can be driven separately; and a corresponding light-blocking structure is provided in the light-shielding layer for each first light-emitting device to block part of the light path of the first light-emitting device from emitting toward the light-emitting surface of the display panel, so that the light-emitting range of the first light-emitting device is smaller than the light-emitting range of the second light-emitting device. On this basis, anti-peeping display can be achieved by controlling only the first light-emitting device to work and turning off the second light-emitting device, and non-anti-peeping display can be achieved by controlling both types of light-emitting devices to work. In this way, it is equivalent to integrating the anti-peeping control structure into the display panel, so that the display panel supports dynamic switching between anti-peeping and non-anti-peeping modes; and, in different display modes, the corresponding display state can be achieved by adjusting the driving method of the pixel circuit. Compared with manually attaching / removing the anti-peeping film, the embodiment of the present invention can more conveniently achieve anti-peeping mode switching. In summary, the embodiment of the present invention can effectively improve the performance of the display panel.

[0023] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present invention; Figure 2 is a structural diagram of another display panel provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of a sub-pixel provided by an embodiment of the present invention; Figure 4 is a schematic structural diagram of another sub-pixel provided by an embodiment of the present invention; Figure 5 is a structural diagram of another display panel provided by an embodiment of the present invention; Figure 6 is a structural diagram of another display panel provided by an embodiment of the present invention; Figure 7is a structural diagram of a pixel unit provided by an embodiment of the present invention; Figure 8 is a structural schematic diagram of an isolation structure provided by an embodiment of the present invention; Figure 9 The embodiment of the present invention provides Figure 6 Schematic diagram of the cross-sectional structure along line D-D'; Figure 10 The embodiment of the present invention provides Figure 6 Schematic diagram of the cross-sectional structure of C-C'; Figure 11 is a schematic flow chart of a method for driving a display panel provided by an embodiment of the present invention; Figure 12 is a schematic flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention; Figure 13 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0028] As mentioned in the background technology, the performance of current OLED display products still needs to be improved, mainly because the display panels in the relevant technologies cannot support the switching between anti-peeping display and non-anti-peeping display. The reasons are as follows: In the OLED display industry, the relevant technologies usually adopt the method of adding a shielding layer to use the black matrix (BM) to block the light to achieve static anti-peeping. However, the above formula is a full-surface pixel light-shielding design, which cannot achieve dynamic anti-peeping, that is, it cannot achieve the switching between anti-peeping state and non-anti-peeping state through some kind of switching control. In addition, if an external anti-peeping film is used to achieve the anti-peeping display effect, the anti-peeping film needs to be manually attached to the light-emitting surface of the display screen when privacy is required, and the anti-peeping film needs to be manually removed when it is not needed. This operation is relatively cumbersome and cannot achieve convenient switching of display modes.

[0029] To solve the above technical problems, an embodiment of the present invention provides a display panel, which realizes convenient dynamic switching between anti-peeping and normal display modes by setting sub-pixels including anti-peeping units and non-anti-peeping units and combining them with light-blocking structures. Figure 1 Schematic diagram of the structure of a display panel provided by an embodiment of the present invention. The display panel is provided with a plurality of sub-pixels, each of which includes an anti-peeping unit and a non-anti-peeping unit. Figure 1 The display panel includes: an array substrate 10, a light emitting device layer and a light shielding layer that are stacked.

[0030] Among them, a plurality of pixel circuits corresponding to sub-pixels are formed in the array substrate 10. The light-emitting device layer is arranged on one side of the array substrate 10, and the light-emitting device layer includes a plurality of light-emitting devices; the plurality of light-emitting devices include a first light-emitting device L1 corresponding to the anti-peeping unit and a second light-emitting device L2 corresponding to the non-anti-peeping unit. Each light-emitting device can be driven individually. The light-shielding layer is arranged on the side of the light-emitting device layer away from the array substrate 10; the light-shielding layer includes a light-blocking structure 91 arranged around at least part of the structure of the first light-emitting device L1; the light-blocking structure 91 is arranged on a portion of the light path corresponding to the first light-emitting device L1, so as to block the light output of the first light-emitting device L1, thereby limiting the light output range of the light-emitting surface of the display panel output by the first light-emitting device L1, so as to realize the anti-peeping function of the anti-peeping unit.

[0031] Among them, for each sub-pixel, the pixel circuit drives the first light-emitting device L1 to work and turns off the second light-emitting device L2 in the anti-peeping display mode. In this way, since the light emission range of the first light-emitting device L1 is limited by the obstruction of the light-blocking structure 91, by only driving the first light-emitting device L1 to work, it is equivalent to controlling only the anti-peeping unit to display, which can limit the visible viewing angle range of the display panel and achieve anti-peeping display. And, for each sub-pixel, the pixel circuit is used to drive both the first light-emitting device L1 and the second light-emitting device L2 to work in the normal display mode; wherein the normal display mode is also the non-anti-peeping display mode. In this mode, by driving both types of light-emitting devices to work, it is equivalent to controlling both the anti-peeping unit and the non-anti-peeping unit to display. By controlling the second light-emitting device L2 with a larger light-emitting range to work, it can supplement the light emission angle that the first light-emitting device L1 cannot reach, thereby widening the visible viewing angle range of the display panel and achieving non-anti-peeping display. It can be understood that driving the light-emitting device to work means providing a driving current to the light-emitting device to drive the light-emitting device to display the grayscale corresponding to the driving current, wherein both black state images and color images are images that can be displayed when the light-emitting device is working. Turning off the light emitting device means not supplying a driving current to the light emitting device, so that the light emitting device does not emit light.

[0032] It is understood that the first light-emitting device L1 and the second light-emitting device L2 in the same sub-pixel are made of the same material and emit the same color. The size ratio of the first light-emitting device L1 and the second light-emitting device L2 in the same sub-pixel can be set according to actual needs to ensure that the display effect in both anti-peeping display mode and normal display mode meets the requirements. For example, the first light-emitting device L1 and the second light-emitting device L2 in the same sub-pixel can be set to the same size.

[0033] Specifically, the array substrate 10 may include at least one active layer and multiple conductive layers to form components such as transistors and capacitors in each pixel circuit, as well as to route the control signal lines required to drive the pixel circuit. At least one insulating layer may be provided between the active layer and the adjacent conductive layer, and between each two adjacent conductive layers. The insulating layer may include at least one of an inorganic layer and an organic layer. The array substrate 10 may also include a substrate for supporting the various functional film layers of the display panel.

[0034] The side of the light-emitting device layer away from the array substrate 10 can be covered with the encapsulation layer 20 to protect the light-emitting devices, such as blocking water and oxygen corrosion. The encapsulation layer 20 may include at least one inorganic layer and / or at least one organic layer. The light-shielding layer may be provided on the side of the encapsulation layer 20 away from the array substrate 10. It should be noted that the spacing between the light-shielding layer and the light-emitting device layer in the thickness direction Z of the display panel, the thickness and width of the light-blocking structure 91, and the light path range of the first light-emitting device L1 blocked by the light-blocking structure 91 can all be adjusted according to actual needs, for example, according to the viewing angle range required in the anti-peep display mode (or the light-emitting angle range of the first light-emitting device L1 to the light-emitting surface) and the light-emitting angle range that the second light-emitting device L2 needs to emit to the light-emitting surface.

[0035] A cover plate 30 may also be provided on the side of the light-shielding layer facing away from the array substrate 10 to protect the display panel, reduce the effects of physical impact (such as drops and collisions) and daily wear and tear (such as scratches and fingerprints), and extend the service life of the display panel. The light-emitting surface of the display panel can be understood as the surface of the cover plate 30 facing away from the array substrate 10. For example, an optical adjustment layer, such as a polarizer, may be provided between the light-shielding layer and the cover plate 30 to filter and perform other optical adjustments on the light emitted by each light-emitting device, thereby achieving a better display effect.

[0036] The display panel provided in an embodiment of the present invention is provided with a plurality of sub-pixels including anti-peeping units and non-anti-peeping units. A first light-emitting device L1 corresponding to the anti-peeping unit and a second light-emitting device L2 corresponding to the non-anti-peeping unit are provided in the light-emitting device layer. This is equivalent to dividing the original light-emitting device in the sub-pixel into two light-emitting devices, so that the two light-emitting devices can be driven separately. In addition, a corresponding light-blocking structure 91 is provided in the light-shielding layer for each first light-emitting device L1, which is used to block part of the light path of the first light-emitting device L1 from emitting toward the light-emitting surface of the display panel, so that the light-emitting range of the first light-emitting device L1 is smaller than the light-emitting range of the second light-emitting device L2. On this basis, anti-peeping display can be achieved by controlling only the first light-emitting device L1 to operate and turning off the second light-emitting device L2, and non-peeping display can be achieved by controlling both types of light-emitting devices to operate. This is equivalent to integrating the privacy control structure into the display panel, allowing the display panel to dynamically switch between privacy protection and non-privacy protection. Furthermore, by adjusting the driving method of the pixel circuit in different display modes, the corresponding display state can be achieved. Compared to manually attaching / removing the privacy film, the embodiment of the present invention can more conveniently switch between privacy protection modes. In summary, the embodiment of the present invention can effectively improve the performance of the display panel.

[0037] Based on the above embodiments, each sub-pixel in the display panel optionally includes a pixel circuit, a first light-emitting device L1, and a second light-emitting device L2. The driving terminals (e.g., anodes) of the light-emitting devices are insulated from each other and disconnected. The driving terminals of the first light-emitting device L1 and the second light-emitting device L2 in the same sub-pixel are also isolated from each other and can be driven independently.

[0038] Continue to see Figure 1 On the basis of the above embodiments, optionally, the light blocking structure 91 encloses a light-transmitting hole K, and the orthographic projection of the light blocking structure 91 on the array substrate 10 surrounds the orthographic projection of the corresponding first light-emitting device L1 on the array substrate 10, and the orthographic projection of the light-transmitting hole K on the array substrate overlaps with the orthographic projection of the first light-emitting device L1 on the array substrate 10.

[0039] The light-shielding layer may include a plurality of light-blocking structures 91 corresponding to each first light-emitting device L1. The light emitted by the first light-emitting device L1 is emitted from the light-emitting surface of the display panel through the light-transmitting hole K of the light-blocking structure 91 corresponding to the first light-emitting device L1. The angle range of the light emitted by the second light-emitting device L2 through the light-shielding layer and emitted from the light-emitting surface is greater than the angle range of the light emitted by the first light-emitting device L1 through the light-transmitting hole K and emitted from the light-emitting surface; in other words, in the light-shielding layer, the light-blocking structure 91 is only provided for each first light-emitting device L1 to limit the light-emitting range of the first light-emitting device L1, so that the first light-emitting device L1 can only emit light to the light-emitting surface through the light-transmitting hole K, and the light at other angles emitted by the first light-emitting device L1 is blocked by the light-blocking structure 91 and therefore cannot be provided to the light-emitting surface; and the light-blocking structure 91 is not provided for the second light-emitting device L2, so that the light-emitting range of the second light-emitting device L2 is larger than the light-emitting range of the first light-emitting device L1.

[0040] For example, the light-blocking structure 91 may be an annular structure having a light-transmitting hole K, and its outer contour may be a rectangle, a square, a circle, an ellipse, a hexagon, or other regular polygon or irregular shape, which may be determined according to actual needs and the layout location, and is not limited here. The diameter of the light-transmitting hole K may be set according to actual needs.

[0041] Exemplarily, the orthographic projection of the centroid of the light-transmitting hole K on the array substrate 10 can be set to overlap with the orthographic projection of the centroid of the first light-emitting device L1 on the array substrate 10 to ensure that the limiting effect on the light-emitting range of the first light-emitting device L1 in all directions is consistent, so that on a plane parallel to the light-emitting surface, the light-emitting angle of the first light-emitting device L1 can be limited to the same range in all directions.

[0042] Based on the above embodiments, optionally, the angles between each light ray emitted from the light emitting surface of the display panel by the first light emitting device L1 through the light hole K and the normal line nn of the light emitting surface are all less than or equal to a preset angle. Figure 1 The figure exemplarily shows the angle α between the light ray emitted from the centroid of the first light-emitting device L1 through the light-transmitting hole K and the normal nn, which deviates from the normal nn by the maximum angle. This angle α is less than the preset angle. For example, the preset angle can be set to be less than or equal to 45°, such as 45°, 40°, 35°, 30°, 25°, or 20°. This limits the overall angular range of the light emitted by the first light-emitting device L1 through the light-shielding layer (or light-transmitting hole K) and the light-emitting surface to a certain range, thereby achieving a good privacy protection effect.

[0043] Based on the above embodiments, optionally, the orthographic projection of the light-blocking structure 91 on the array substrate 10 and the orthographic projection of the second light-emitting device L2 on the array substrate 10 may not overlap. In this way, the light-blocking structure 91 can minimize the blocking of the light emitted by the second light-emitting device L2, so that when the second light-emitting device L2 emits light, it can well supplement the lighting effect at angles that are not illuminated by the first light-emitting device L1.

[0044] Figure 2 FIG is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. Figure 2 , on the basis of the above embodiments, optionally, the light-shielding layer further includes: a black matrix structure 92 arranged around each second light-emitting device L2. The orthographic projection of the black matrix structure 92 on the array substrate 10 does not overlap with the orthographic projection of the second light-emitting device L2 on the array substrate 10. The black matrix structure 92 is used to prevent crosstalk between light emitted by different light-emitting devices. It can be understood that the light path restriction ratio of the black matrix structure 92 to the second light-emitting device L2 is lower than the light path restriction ratio of the light-blocking structure 91 to the first light-emitting device L1, and the black matrix structure 92 is only used to prevent crosstalk. Exemplarily, the black matrix structure 92 encloses a light-emitting hole corresponding to each second light-emitting device L2, and the area / diameter of the light-emitting hole is larger than the area / diameter of the light-transmitting hole K. Exemplarily, the light-blocking structure 91 and the black matrix structure 92 can be connected as an integral structure, and prepared using the same material in the same process flow.

[0045] The above embodiments illustrate the implementation ideas of dynamic privacy protection for display panels. The following examples illustrate the specific structures of sub-pixels and the specific film layer structures of display panels, but do not limit the present invention.

[0046] Figure 3 Schematic diagram of a sub-pixel structure provided by an embodiment of the present invention. Figure 3Based on the above embodiments, the pixel circuit 110 optionally includes a pixel driving module 111, a first output terminal N1 connected to the pixel driving module 111, a switch module 112, and a second output terminal N2 connected to the pixel driving module 111 via the switch module 112. In the same sub-pixel 100, the first output terminal N1 is connected to the first light-emitting device L1, the second output terminal N2 is connected to the second light-emitting device L2, and the switch module 112 is connected between the first output terminal N1 and the second output terminal N2. The switch module 112 is configured to be turned off in the anti-peeping display mode and turned on in the normal display mode.

[0047] Specifically, the pixel driving module 111 can receive a first power supply voltage ELVDD and a data voltage Vdata, and control the magnitude of the driving current provided to the first output terminal N1 based on the data voltage Vdata. The pixel driving module 111 can have any pixel driving circuit architecture, such as 2T1C, 7T1C, and 8T1C, and the specific structure of the pixel driving module 111 is not limited herein.

[0048] The switch module 112 may include a control terminal, a switch module input terminal connected to the first output terminal N1, and a switch module output terminal connected to the second output terminal N2. The control terminal of the switch module 112 may receive a switch control signal S4. Specifically, the switch module 112 may be turned on or off based on the potential of its control terminal to control whether the drive current output from the first output terminal N1 is provided to the second output terminal N2. The first output terminal N1 may be directly connected to the anode of the first light-emitting device L1 and connected to the switch module input terminal. The second output terminal N2 may be connected to the anode of the second light-emitting device L2. The cathodes of the first and second light-emitting devices L1 and L2 may be connected to the same second power supply voltage ELVSS. The first and second power supply voltages ELVDD and ELVSS may be different. For example, the first power supply voltage ELVDD may have a high potential, while the second power supply voltage ELVSS may have a low potential. The cathodes of the first and second light-emitting devices L1 and L2 may be isolated or integrated, depending on actual needs.

[0049] In summary, this embodiment provides a pixel circuit 110 including a pixel driver module 111 and a switch module 112. The pixel driver module 111 is used to generate a drive current, and the switch module 112 is used to control whether the second light-emitting device L2 is driven to operate. Thus, the pixel driver module 111 can adopt the structure of any pixel driver circuit in the related art. The pixel circuit 110 is equivalent to adding a switch module 112 to the pixel driver circuit. This allows for minimal changes to the pixel circuit structure, making the pixel circuit easy to design and implement.

[0050] Specifically, the switch control signal S4 can be a global signal that can control the uniform on / off switching of all switch modules 112 across the entire screen to adjust the anti-peeping state of the display panel. For example, the control end of each switch module 112 can transmit the cutoff potential of the switch module 112 in the anti-peeping display mode to control the switch modules 112 to be turned off, thereby achieving an anti-peeping display based on each first light-emitting device L1; and the control end of each switch module 112 can transmit the on-potential of the switch module 112 in the normal display mode to control the switch modules 112 to be turned on, thereby achieving a non-anti-peeping display based on all light-emitting devices. It is understood that the on-potentials of each switch module 112 are consistent, and each switch module 112 can have the same circuit structure and control principle.

[0051] Figure 4 is a schematic diagram of the structure of another sub-pixel provided by an embodiment of the present invention, see Figure 4 In one embodiment, the switch module 112 optionally includes: a first transistor M1; a gate of the first transistor M1 connected to a control terminal of the switch module 112 and receiving a switch control signal S4; a first electrode of the first transistor M1 connected to a first output terminal N1, and a second electrode of the first transistor M1 connected to a second output terminal N2. In this embodiment, the switch module 112 is composed of a single transistor, which simplifies the structure of the switch module 112 and facilitates implementation.

[0052] Exemplarily, the pixel driving module 111 includes a plurality of transistors, which may include at least a driving transistor and a data writing transistor. Based on this, the first transistor M1 may be configured to have the same channel type as at least some of the transistors in the pixel driving module 111, so that at least some of the transistors in the pixel driving module 111 and the switch module 112 can be manufactured in the same process, thereby simplifying the manufacturing process. Preferably, the first transistor M1 may be configured to have the same channel type as all of the transistors in the pixel driving module 111, thereby simplifying the manufacturing process and facilitating a reduction in panel thickness. For example, each transistor in the pixel circuit may be a P-type transistor, specifically a P-type LTPS (Low Temperature Poly-silicon) TFT (Thin Film Transistor).

[0053] Continue to see Figure 4In one embodiment, the pixel driving module 111 optionally has an 8T1C architecture. Specifically, the pixel driving module 111 may include: a driving transistor DTFT, a data writing transistor M2, a threshold compensation transistor M3, a first initialization transistor M4, a first emission control transistor M5, a second emission control transistor M6, a second initialization transistor M7, a third initialization transistor M8, and a storage capacitor Cst. The first initialization transistor M4 is connected to the gate of the driving transistor DTFT and receives the first scan signal S1 and the first initialization signal Vref1. To reduce leakage from the gate of the driving transistor DTFT through the first initialization transistor M4 during the light-emitting process, the first initialization transistor M4 may be configured as a dual-gate transistor. The data writing transistor M2 is connected to the first electrode of the driving transistor DTFT and receives the data voltage Vdata and the second scan signal S2. The threshold compensation transistor M3 is connected between the gate and the second electrode of the driving transistor DTFT and receives the second scan signal S2. To reduce leakage from the gate of the driving transistor DTFT through the threshold compensation transistor M3 during the light-emitting process, the threshold compensation transistor M3 may be configured as a dual-gate transistor. The first light-emitting control transistor M5 is connected to the first electrode of the driving transistor DTFT and receives the first power supply voltage ELVDD and the light-emitting control signal EM. The second light-emitting control transistor M6 is connected between the second electrode of the driving transistor DTFT and the first output terminal N1 and receives the light-emitting control signal EM. The second initialization transistor M7 is connected to the first output terminal N1 and receives the third scan signal S3 and the second initialization signal Vref2. The third initialization transistor M8 is connected to the first electrode of the driving transistor DTFT (as shown in FIG. Figure 4 The storage capacitor Cst is connected to the gate of the driving transistor DTFT and is connected to the first power supply voltage ELVDD.

[0054] by Figure 4 Taking the structure shown in as an example, the driving process of the pixel driving module 111 may include: In the first initialization stage, the first scanning signal S1 is at a low potential, which controls the first initialization transistor M4 to be turned on, and provides the first initialization signal Vref1 to the gate of the driving transistor DTFT to initialize the gate of the driving transistor DTFT.

[0055] In the data writing stage, the second scanning signal S2 is at a low level, which controls the data writing transistor M2 and the threshold compensation transistor M3 to be turned on. The data voltage Vdata is transmitted to the gate of the driving transistor DTFT through the data writing transistor M2, the driving transistor DTFT and the threshold compensation transistor M3 until the driving transistor DTFT is turned off, completing the data writing.

[0056] During the second initialization phase, the third scan signal S3 is at a low level, turning on both the second initialization transistor M7 and the third initialization transistor M8. The third initialization signal Vref3 is transmitted to the first electrode of the driving transistor DTFT, initializing the first electrode of the driving transistor DTFT. The second initialization signal Vref2 is transmitted to the first output terminal N1, initializing the anode of the first light-emitting device L1. At this time, if the first transistor M1 is turned on, the anode of the second light-emitting device L2 is also initialized. If the first transistor M1 is turned off, the anode of the second light-emitting device L2 is not initialized. It is understood that during each display frame in the anti-peeping display mode, each first transistor M1 can be controlled to be turned off, neither initializing nor driving the second light-emitting device L2 to emit light. During each display frame in the normal display mode, each first transistor M1 can be controlled to be turned on, so that each second light-emitting device L2 is initialized and emits light synchronously with the first light-emitting device L1 in the same sub-pixel. For example, the second initialization phase can be set at any time before the light-emitting phase in the display frame.

[0057] During the light-emitting phase, the light-emitting control signal EM is at a low level, turning on both the first light-emitting control transistor M5 and the second light-emitting control transistor M6. The driving transistor DTFT generates a driving current based on the potential of its gate and provides the current to the first output terminal N1. During this phase, if the first transistor M1 is turned on, the driving current can drive both the first light-emitting device L1 and the second light-emitting device L2 to operate. If the first transistor M1 is turned off, the driving current only drives the first light-emitting device L1 to operate, while the second light-emitting device L2 is turned off and does not emit light.

[0058] Based on the above embodiments, optionally, to provide various control signals required by each pixel circuit 110, multiple control signal lines can be arranged in each conductive layer of the array substrate 10. For example, the pixel circuits 110 are arranged in an array on the array substrate 10; the array substrate also includes the following control signal lines: 1) A plurality of data lines, for example, are connected to each column of pixel circuits 110 in a one-to-one correspondence, and each data line provides a data voltage Vdata to each column of pixel circuits 110 .

[0059] 2) A plurality of first scanning signal lines, for example, connected to each row of pixel circuits 110 in a one-to-one correspondence, and each first scanning signal line provides a first scanning signal S1 to each row of pixel circuits 110 .

[0060] 3) A plurality of second scanning signal lines, for example, connected to each row of pixel circuits 110 in a one-to-one correspondence, and each second scanning signal line provides a second scanning signal S2 to each row of pixel circuits 110 .

[0061] 4) A plurality of third scanning signal lines, for example, connected to each row of pixel circuits 110 in a one-to-one correspondence, and each third scanning signal line provides a third scanning signal S3 to each row of pixel circuits 110 .

[0062] 5) A plurality of light emitting control signal lines, for example, connected to each row of pixel circuits 110 in a one-to-one correspondence, and each light emitting control signal line provides a light emitting control signal EM to each row of pixel circuits 110 .

[0063] 6) A first initialization signal line, for example, connected to all pixel circuits 110 , and used to provide a first initialization signal Vref1 to each pixel circuit 110 .

[0064] 7) A second initialization signal line, for example, connected to all pixel circuits 110 , and configured to provide a second initialization signal Vref2 to each pixel circuit 110 .

[0065] 8) A third initialization signal line, for example, connected to all pixel circuits 110 , and used to provide a third initialization signal Vref3 to each pixel circuit 110 .

[0066] 9) A first power line, for example, connected to all pixel circuits 110 , and configured to provide a first power voltage ELVDD to each pixel circuit 110 .

[0067] Based on the above embodiments, the array substrate 10 may optionally include multiple conductive layers, and the above-mentioned various control signal lines may be distributed in each conductive layer as required, and the specific setting positions are not limited here.

[0068] Figure 5 This is a structural diagram of another display panel provided by an embodiment of the present invention, see Figure 5 The array substrate 10 may include at least: a substrate 11, an active layer 12, a first insulating layer 16, a first conductive layer 13, a second insulating layer 17, a second conductive layer 14, a third insulating layer 18, a third conductive layer 15 and a planarization layer 19 stacked in sequence.

[0069] The substrate 11 is used to support the various functional film layers in the display panel and can be located throughout the display and non-display areas of the display panel. The substrate 11 can be made of an organic material, such as polyimide (PI), or an inorganic material, such as glass. The substrate can be flexible or non-flexible as needed. The active layer 12 is used to form the channel, source, and drain regions of each thin-film transistor (TFT) in the pixel circuit 110. The active layer 12 is made of, for example, polycrystalline silicon. The conductive layers can be used to form the various components in the pixel circuit 110 and the various control signal lines required to drive the pixel circuit. The conductive layers can be made of metal materials such as molybdenum or titanium aluminum titanium, or non-metallic conductive materials such as indium tin oxide. Exemplarily, the first conductive layer 13 is used to form the gate of each thin film transistor TFT and one plate of the storage capacitor Cst, the second conductive layer 14 is used to form the other plate of the storage capacitor Cst, and the third conductive layer 15 is used to form the first electrode and the second electrode of each thin film transistor TFT; wherein, one of the first electrode and the second electrode of the thin film transistor TFT is connected to the source region through a via hole, and the other is connected to the drain region through a via hole. Each insulating layer is used to achieve interlayer insulation, and the insulating layer can be composed of inorganic materials such as silicon nitride and silicon oxide. The planarization layer 19 can be used to achieve film flatness, so that the side of the array substrate 10 close to the light-emitting device layer is flat, and then the subsequent light-emitting device layer is flat to optimize the pixel light-emitting effect. The planarization layer 19 can be prepared using organic materials.

[0070] On the basis of the above embodiments, optionally, a pixel defining layer 40 can be provided on the side of the planarization layer 19 away from the substrate 11, and the pixel defining layer 40 can be provided with a plurality of pixel openings 41, and each light-emitting device is at least partially provided in each pixel opening 41. For example, each light-emitting device can be provided in each pixel opening one by one. Figure 5 In the example, an anode 51 of a light emitting device is provided in a pixel opening 41, and the anode 51 can be connected to the thin film transistor TFT in the pixel circuit 110 through a via hole penetrating the planarization layer 19. Figure 5 The anode 51 shown in FIG. 5 is the anode of the first light emitting device L1 , and the thin film transistor TFT connected thereto may be the second light emitting control transistor M6 .

[0071] Figure 6 FIG is a structural diagram of another display panel provided by an embodiment of the present invention. Figure 6, exemplarily, the display panel 80 includes a display area AA and a non-display area NAA, and each sub-pixel can be arranged in an array in the display area AA. More specifically, a pixel unit PX can be used as the minimum repeating unit in the display panel 80, and each pixel unit PX is arranged in an array in the display area AA, wherein each pixel unit PX may include multiple sub-pixels displaying different colors, and the projection areas of sub-pixels of different colors on the array substrate 10 may be the same or different, which is not limited here. In some embodiments, optionally, a pixel unit PX may include a first sub-pixel 100-1, a second sub-pixel 100-2, and a third sub-pixel 100-3, for example, the first sub-pixel 100-1 is a red sub-pixel, the second sub-pixel 100-2 is a green sub-pixel, and the third sub-pixel 100-3 is a blue sub-pixel. The above examples are not intended to limit the present invention. In some embodiments, optionally, a pixel unit PX may include white or other color sub-pixels in addition to the above three sub-pixels, and the specific details can be adjusted according to actual needs. Exemplarily, the three-dimensional rectangular coordinate system of the display panel can be as follows Figure 6 As shown, it includes a row direction X, a column direction Y and a thickness direction Z that are perpendicular to each other.

[0072] Figure 7 Schematic diagram of a pixel unit provided by an embodiment of the present invention. Figure 7 , exemplarily, the first light-emitting devices in the first sub-pixel 100-1, the second sub-pixel 100-2 and the third sub-pixel 100-3 are L1-1, L1-2 and L1-3 respectively, and the second light-emitting devices in the first sub-pixel 100-1, the second sub-pixel 100-2 and the third sub-pixel 100-3 are L2-1, L2-2 and L2-3 respectively. In the same pixel unit PX, the first light-emitting devices of each sub-pixel are arranged, for example, along the row direction X, the second light-emitting devices of each sub-pixel are also arranged, for example, along the row direction X, and the first light-emitting devices and the second light-emitting devices of the same sub-pixel are arranged, for example, along the column direction Y. The light-blocking structures 91 corresponding to the first light-emitting devices in the same row can be independently isolated and arranged, or can be as follows Figure 7 The black matrix structure 92 corresponding to the second light emitting device in the same row can also be as shown. Figure 7 The connections are shown as one piece to prevent crosstalk.

[0073] On the basis of the above embodiments, optionally, the display panel 80 further includes: an isolation structure, which is arranged between the array substrate 10 and the light-shielding layer, and the isolation structure encloses a plurality of isolation openings; wherein each light-emitting device is at least partially arranged in the corresponding isolation opening, for example, each light-emitting device is arranged one by one in each isolation opening. Figure 8 This is a schematic diagram of an isolation structure provided by an embodiment of the present invention, see Figure 8 The isolation structure 60 can enclose an array of isolation openings 601, allowing light-emitting devices to be formed within each isolation opening 601. The fine metal mask-free technology based on the isolation structure 60 eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance, offering the advantages of high performance, full-scale scalability, and agile delivery. The following briefly describes the isolation structure.

[0074] Figure 9 The embodiment of the present invention provides Figure 6 Schematic diagram of the cross-sectional structure of D-D'. Figure 9 In one embodiment, the isolation structure 60 optionally includes an isolation portion 62 and a barrier portion 61 stacked in a direction away from the array substrate 10. The width of the barrier portion 61 is greater than that of the isolation portion 62, and the orthographic projection of the isolation portion 62 on the array substrate 10 lies within the orthographic projection of the barrier portion 61 on the array substrate 10. As a result, the ends of the barrier portion 61 protrude from the side surfaces of the isolation portion 62. This shape of the isolation structure 60 is also referred to as an overhang. The isolation portion 62 and the barrier portion 61 are made of different materials, and the etching rate of the barrier portion 61 is lower than that of the isolation portion 62. The isolation portion 62 is made of a conductive material, specifically at least one of aluminum (Al) and an aluminum alloy. The aluminum alloy may include at least one of aluminum-neodymium alloy (AlNd), aluminum-yttrium alloy (AlY), or aluminum-silicon alloy (AlSi). The barrier portion 61 may have a single-layer or multi-layer structure. If the barrier portion 61 is a single-layer structure, the barrier portion 61 may be made of at least one of titanium, titanium nitride, molybdenum, tungsten, a molybdenum-tungsten alloy, or a molybdenum-niobium alloy. When the barrier portion 61 has a multi-layer structure, one layer of the barrier portion 61 may be made of at least one of titanium, titanium nitride, molybdenum, tungsten, a molybdenum-tungsten alloy, or a molybdenum-niobium alloy, and another layer of the barrier portion 61 may be made of a conductive oxide or an inorganic insulating material, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0075] in, Figure 9 Can be seen as along Figure 6 In the schematic cross-sectional structure diagram along line D-D', the first light-emitting device L1 and the second light-emitting device L2 in the sub-pixel cut along line D-D' are arranged along the column direction Y, and a light-blocking structure 91 is provided above the first light-emitting device L1. The light-transmitting hole K of the light-blocking structure 91 is, for example, provided opposite to the isolation opening where the first light-emitting device L1 is located. Figure 9 The light blocking structure 91 is mainly shown in FIG. 1 , but the black matrix structure corresponding to the second light emitting device L2 is not shown.

[0076] On this basis, see Figure 10The isolation structure 60 may further include a base 63 located on the side of the isolation portion 62 close to the array substrate 10. The base 63 is provided to protrude relative to the isolation portion 62 in the direction toward the isolation opening 601. The orthographic projection of the isolation portion 62 on the array substrate 10 is located within the orthographic projection of the base 63 on the array substrate 10. The material of the base 63 may include at least one of molybdenum (Mo), titanium (Ti), titanium nitride (TiN), molybdenum-tungsten alloy (MoW), or molybdenum-niobium alloy (MoNb). Figure 10 Can be seen as along Figure 6 Schematic diagram of the cross-sectional structure of C-C'.

[0077] Continue to see Figure 10 On the basis of the above embodiments, optionally, the display panel further includes: a pixel defining layer 40, the pixel defining layer 40 is arranged between the isolation structure 60 and the array substrate 10; a plurality of pixel openings respectively connected to the isolation openings 601 are provided on the pixel defining layer 40, and each light-emitting device L is at least partially arranged in each pixel opening. Exemplarily, the shape of the orthographic projection of the pixel opening and the corresponding isolation opening 601 on the array substrate 10 may be the same or different. Generally speaking, the area of the orthographic projection of the isolation opening 601 on the array substrate 10 is larger than the area of the orthographic projection of the pixel opening connected to the isolation opening 601 on the array substrate 10. The orthographic projection of the pixel opening of the light-emitting device L on the array substrate 10 overlaps with the orthographic projection of the isolation opening 601 on the array substrate 10. The material of the pixel defining layer 40 may be an inorganic material, for example, the pixel defining layer 40 is formed using an inorganic insulating material of at least one of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON). In one embodiment, optionally, the isolation structure 60 is as Figure 10 As shown, the isolation structure 60 is disposed on the pixel defining layer 40. Alternatively, in another embodiment, the isolation structure 60 may be disposed in a groove of the pixel defining layer 40. Alternatively, in yet another embodiment, the pixel defining layer 40 may not be disposed in the display panel, and the isolation structure 60 may be disposed on one side of the array substrate 10, and the isolation structure 60 may be disposed in contact with one side of the array substrate 10.

[0078] Continue to see Figure 10 In one embodiment, optionally, the light-emitting device L includes: an anode 51, a light-emitting structure 52 and a cathode 53 stacked in a direction away from the array substrate 10; the anode 51 is connected to the pixel circuit 110 in the sub-pixel 100 in which it is located.

[0079] Specifically, the anode 51 is arranged on the array substrate 10, the pixel defining layer 40 covers the end of the anode 51, and a pixel opening is provided on the pixel defining layer 40, through which the anode 51 is exposed; the light-emitting structure 52 covers the side wall of the pixel opening of the pixel defining layer 40 and the side of the pixel defining layer 40 facing away from the array substrate 10; each light-emitting structure 52 is respectively located in the corresponding pixel opening and in contact with the anode 51.

[0080] The anode 51 may comprise a multilayer structure, for example, including a reflective layer and a pair of conductive oxide layers covering the upper and lower surfaces of the reflective layer, respectively. The reflective layer can be formed using, for example, a metal material with excellent light reflectivity, such as silver. Each conductive oxide layer can be formed using, for example, a transparent conductive oxide such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or IGZO (Indium Gallium Zinc Oxide). The cathode 53 is formed using, for example, a metal material such as a magnesium-silver alloy (MgAg). The light-emitting structure 52 may include a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting material layer, a hole blocking layer, an electron transport layer, and an electron injection layer, stacked in a direction away from the array substrate 10. The light-emitting structure 52 may include a single light-emitting material layer or a stacked light-emitting structure comprising multiple light-emitting material layers.

[0081] To make the light-emitting structure 52 emit light, a pixel voltage can be supplied to the anode 51, and a common voltage (e.g., the aforementioned second power supply voltage ELVSS) can be supplied to the cathode 53. This creates a potential difference between the anode 51 and the cathode 53, causing the light-emitting structure 52 disposed between the anode 51 and the cathode 53 to emit light. The pixel voltage for the anode 51 is supplied by the pixel circuit 110, and the common voltage for the cathode 53 can be supplied by the isolation structure 60. Specifically, the cathode 53 is electrically connected to the isolation structure 60. By supplying the common voltage to the isolation structure 60, the common voltage is supplied to the cathode 53. In other words, the isolation structure 60 serves to supply the common voltage to the cathode 53.

[0082] Continue to see Figure 9 Based on the above embodiments, the display panel may optionally further include an encapsulation layer 20, which is disposed between the light-emitting device layer and the light-shielding layer and covers the isolation structure 60. The encapsulation layer 20 may include at least one inorganic layer and at least one organic layer stacked together.

[0083] Specifically, the encapsulation layer 20 may include: a first encapsulation layer 21, a second encapsulation layer 22 and a third encapsulation layer 23. Figure 10The first encapsulation layer 21 includes a plurality of encapsulation portions 211 corresponding one to each light-emitting device L. The encapsulation portion 211 is disposed on the side of the corresponding light-emitting device L away from the array substrate 10, specifically on the side of the cathode 53 away from the array substrate 10, and extends through the sidewall of the isolation structure 60 to the side of the isolation structure 60 away from the array substrate 10. The second encapsulation layer 22 is disposed on the side of the first encapsulation layer 21 away from the array substrate 10, covering the isolation structure 60 and the encapsulation portions 211. The third encapsulation layer 23 is disposed on the side of the second encapsulation layer 22 away from the array substrate 10, covering the second encapsulation layer 22. A light shielding layer is disposed on the side of the third encapsulation layer 23 away from the array substrate 10.

[0084] The first encapsulation layer 21 and the third encapsulation layer 23 are both made of inorganic materials, including at least one of silicon nitride (SiN), silicon oxide (SiO), and silicon oxynitride (SiON). The second encapsulation layer 22 is an organic insulating material, such as epoxy resin, acrylic resin, or other resin material. The second encapsulation layer 22 and the third encapsulation layer 23 are continuously disposed throughout at least the display area AA, with portions also disposed in the non-display area NAA.

[0085] Based on the above embodiments, the display panel may optionally further include a touch layer. The touch layer is disposed between the encapsulation layer 20 and the light shielding layer to provide touch functionality. Furthermore, the light shielding layer may further include at least one film layer, such as a polarizer, a color filter substrate, and a cover plate 30, on the side facing away from the array substrate 10. These film layers may be bonded to the display panel via an adhesive layer, such as an OCA (Optical Clear Adhesive).

[0086] In summary, the present embodiment is equivalent to a pixel segmentation scheme based on the isolation structure 60, but simultaneously splits the anode of each segmented sub-pixel, thereby splitting the sub-pixel's light-emitting device into two light-emitting devices: a first light-emitting device L1 and a second light-emitting device L2. One of the light-emitting devices (i.e., the first light-emitting device L1) is directly connected to the first output terminal N1, and a light-blocking structure 91 is provided above it to limit the light-emitting angle range. A switch module 112 is added to the anode drive path of the other light-emitting device (i.e., the second light-emitting device L2), and the light emission of this path is controlled by a switch control signal S4. In anti-peeping display mode, the switch control signal S4 turns off the switch module 112, causing the first light-emitting device L1 to operate and the second light-emitting device L2 to be inactive. In normal display mode, the switch control signal S4 turns on the switch module 112, causing both the first light-emitting device L1 and the second light-emitting device L2 to operate. Thus, pixel segmentation is used to implement dynamic anti-peeping control, enabling the display panel to dynamically switch between anti-peeping and non-anti-peeping modes.

[0087] An embodiment of the present invention further provides a method for driving a display panel, which is applied to the display panel provided by any embodiment of the present invention and has corresponding beneficial effects. Figure 11 FIG is a flow chart of a method for driving a display panel provided by an embodiment of the present invention. Figure 11 , the driving method of the display panel includes: S110 , in the anti-peeping display mode, controlling the pixel circuit in each sub-pixel to drive the first light-emitting device to operate and turn off the second light-emitting device.

[0088] S120 . In a normal display mode, control the pixel circuit in each sub-pixel to drive the first light-emitting device and the second light-emitting device to operate.

[0089] The driving method of the display panel provided by the embodiment of the present invention is based on a structure in which the sub-pixel includes an anti-peeping unit based on a first light-emitting device and a non-anti-peeping unit based on a second light-emitting device, and a structure in which a corresponding light-blocking structure is provided for each first light-emitting device to limit the range of light emitted from the light-emitting surface of the display panel by each first light-emitting device. Anti-peeping display can be achieved by controlling only the first light-emitting device to work and turning off the second light-emitting device, and non-anti-peeping display can be achieved by controlling both types of light-emitting devices to work. In this way, it is equivalent to integrating the anti-peeping control structure into the display panel, so that the display panel supports dynamic switching between anti-peeping and non-anti-peeping; and, in different display modes, the corresponding display state can be achieved by adjusting the driving method of the pixel circuit. Compared with manually attaching / removing the anti-peeping film, the embodiment of the present invention can more conveniently achieve anti-peeping mode switching.

[0090] Specifically, a display panel is provided with a plurality of sub-pixels, each of which includes an anti-peeping unit and a non-anti-peeping unit. The display panel includes an array substrate, a light-emitting device layer, and a light-shielding layer stacked in sequence. The array substrate is provided with a plurality of pixel circuits corresponding to the sub-pixels. The light-emitting device layer includes a plurality of light-emitting devices. The light-emitting devices include a first light-emitting device corresponding to the anti-peeping unit and a second light-emitting device corresponding to the non-anti-peeping unit. The light-shielding layer includes a light-blocking structure disposed around at least a portion of the structure of the first light-emitting device. The light-blocking structure is disposed on a portion of the light path of the corresponding first light-emitting device. The pixel circuit includes a pixel driver module and a switch module. The first light-emitting device is connected to the pixel driver module. The switch module includes a control terminal, a switch module input terminal connected to the pixel driver module, and a switch module output terminal connected to the second light-emitting device. For example, the pixel circuit includes a pixel driver module, a first output terminal connected to the pixel driver module, a switch module, and a second output terminal connected to the pixel driver module via the switch module. The first output terminal is connected to the first light-emitting device, and the second output terminal is connected to the second light-emitting device. The switch module includes a control terminal, a switch module input terminal connected to the first output terminal, and a switch module output terminal connected to the second output terminal.

[0091] Accordingly, the driving method of the display panel may specifically include: In the anti-peeping display mode: the control end is controlled to transmit the cutoff potential of the switch module so that each switch module is turned off; the pixel driving module in each sub-pixel is controlled to output a driving current to drive each first light-emitting device to work.

[0092] In the normal display mode: the control end transmits the conduction potential of the switch module to turn on each switch module; the pixel driving module in each sub-pixel is controlled to output a driving current to drive each first light-emitting device and each second light-emitting device to work.

[0093] In this way, by adjusting the potential received by the control terminal to control the on / off state of each switch module, the switch between anti-peeping display and non-anti-peeping display can be achieved. It can be understood that the working process of the pixel driving module is the same regardless of the anti-peeping display mode or the non-anti-peeping display mode.

[0094] The present invention also provides a method for manufacturing a display panel, which is used to manufacture the display panel provided by any embodiment of the present invention and has corresponding beneficial effects. The display panel is provided with a plurality of sub-pixels, each of which includes an anti-peeping unit and a non-anti-peeping unit. Figure 12 FIG1 is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention. Figure 12 , the manufacturing method of the display panel includes: S210: Provide an array substrate.

[0095] Wherein, a plurality of pixel circuits corresponding to sub-pixels are formed in the array substrate.

[0096] S220 , forming an isolation structure on one side of the array substrate.

[0097] The isolation structure encloses and forms a plurality of isolation openings.

[0098] S230 , forming a light emitting device layer on one side of the array substrate.

[0099] The light-emitting device layer includes a plurality of light-emitting devices; each light-emitting device is at least partially disposed in a corresponding isolation opening. The light-emitting devices include a first light-emitting device corresponding to the privacy protection unit and a second light-emitting device corresponding to the non-privacy protection unit. Exemplarily, the light-emitting device layer can be a multilayer structure, wherein some film layers can be prepared before the isolation structure, while other film layers are prepared after the isolation structure.

[0100] S240 , forming an encapsulation layer on a side of the light emitting device layer away from the array substrate.

[0101] The encapsulation layer covers each light emitting device and the isolation structure. Exemplarily, the encapsulation layer can be a multi-layer structure, wherein some film layers can be prepared during the preparation of the light emitting device layer, and other film layers can be prepared after the preparation of the light emitting device layer.

[0102] S250 , forming a light shielding layer on a side of the packaging layer away from the array substrate.

[0103] The light-shielding layer includes a light-blocking structure disposed around at least a portion of the structure of the first light-emitting device; the light-blocking structure is disposed in a portion of the light path corresponding to the first light-emitting device; and the angle range at which light emitted by the second light-emitting device exits the light-emitting surface through the light-shielding layer is greater than the angle range at which light emitted by the first light-emitting device exits the light-emitting surface through the light-transmitting hole. The pixel circuit drives the first light-emitting device to operate and turns off the second light-emitting device in anti-peeping display mode, and drives the first and second light-emitting devices to operate in normal display mode.

[0104] Specifically, the light-emitting device includes a stacked anode, a light-emitting structure, and a cathode; the encapsulation layer includes a stacked first encapsulation layer, a second encapsulation layer, and a third encapsulation layer. When a display panel needs to produce sub-pixels of multiple colors, the specific preparation steps of the isolation structure, the light-emitting device, and the encapsulation layer can be found as follows: 1) Anodes of each light-emitting device are formed on one side of the array substrate.

[0105] 2) An isolation structure is formed on the same side of the array substrate as the anode. The isolation structure is provided with isolation openings corresponding to each light-emitting device. For ease of explanation, the different color light-emitting devices are referred to below as the first color light-emitting device, the second color light-emitting device, and so on, and the corresponding isolation openings are named the first isolation opening, the second isolation opening, and so on, where n is equal to the number of colors in the sub-pixel. It should be understood that any color light-emitting device includes both the first light-emitting device of that color and the second light-emitting device of that color.

[0106] 3) Fabricating the light-emitting structure and cathode of each light-emitting device of the first color in each isolation opening.

[0107] 4) Fabricating a first encapsulation layer for the first-color light-emitting device. Since the light-emitting structure and cathode of the first-color light-emitting device and the first encapsulation layer of the first-color light-emitting device are fabricated as a single layer, all isolation openings have the light-emitting structure and cathode of the first-color light-emitting device and are covered by the first encapsulation layer.

[0108] 5) Etching away the light-emitting structure, cathode, and first encapsulation layer of the first-color light-emitting devices at locations other than the first isolation openings, thereby leaving only the first-color light-emitting devices and their encapsulation intact at the locations of the plurality of first isolation openings. The first encapsulation layer remaining after this etching step constitutes the encapsulation of each first-color light-emitting device.

[0109] Based on steps 3) to 5) above, the light-emitting structure, cathode, and packaging portion of the second color light-emitting device are respectively arranged at the location of each second isolation opening. The light-emitting structure, cathode, and packaging portion of the third color light-emitting device are respectively arranged at the locations of multiple third isolation openings. Until the light-emitting structure, cathode, and packaging portion of the n-th color light-emitting device are arranged at the locations of multiple n-th isolation openings, the preparation of each light-emitting device, isolation structure, and first packaging layer is completed. Then, a second packaging layer can be prepared on the side of the first packaging layer away from the array substrate, and a third packaging layer can be prepared on the side of the second packaging layer away from the array substrate, thereby completing the preparation of the packaging layer.

[0110] An embodiment of the present invention further provides a display device, including the display panel provided by any embodiment of the present invention, and having corresponding beneficial effects. Figure 13 Schematic diagram of a display device according to an embodiment of the present invention. Figure 13 The display device 800 may include a display panel 80 and may also include driving components such as a driving chip. For example, the display device may be a mobile phone, a tablet or a laptop computer.

[0111] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0112] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: A plurality of sub-pixels are provided, wherein the sub-pixels include anti-peeping units and non-anti-peeping units, and the display panel includes: An array substrate having a plurality of pixel circuits corresponding to the sub-pixels formed therein; a light emitting device layer, disposed on one side of the array substrate, comprising a plurality of light emitting devices; the light emitting devices comprising a first light emitting device corresponding to the anti-peeping unit and a second light emitting device corresponding to the non-anti-peeping unit; a light shielding layer disposed on a side of the light emitting device layer away from the array substrate; the light shielding layer comprising a light shielding structure disposed around at least a portion of the structure of the first light emitting device; the light shielding structure being disposed on a portion of the light path corresponding to the first light emitting device; The pixel circuit drives the first light emitting device to operate and turns off the second light emitting device in the anti-peeping display mode, and drives the first light emitting device and the second light emitting device to operate in the normal display mode.

2. The display panel according to claim 1, wherein: The light blocking structure encloses a light-transmitting hole, the orthographic projection of the light blocking structure on the array substrate surrounds the orthographic projection of the corresponding first light-emitting device on the array substrate, and the orthographic projection of the light-transmitting hole on the array substrate overlaps with the orthographic projection of the first light-emitting device on the array substrate.

3. The display panel according to claim 2, wherein: An angle between each light ray emitted from the first light emitting device through the light-transmitting hole and the normal line of the light emitting surface is less than or equal to a preset angle.

4. The display panel according to claim 3, wherein: The preset angle is less than or equal to 45°.

5. The display panel according to claim 1, wherein: The light shielding layer further includes: a black matrix structure arranged around each of the second light emitting devices; wherein the orthographic projection of the black matrix structure on the array substrate does not overlap with the orthographic projection of the second light emitting device on the array substrate.

6. The display panel according to claim 1, wherein: The pixel circuit includes a pixel driving module, a first output end connected to the pixel driving module, a switch module, and a second output end connected to the pixel driving module through the switch module; the first output end is connected to the first light-emitting device, and the second output end is connected to the second light-emitting device; the switch module is used to turn off in the anti-peeping display mode and turn on in the normal display mode.

7. The display panel according to claim 6, wherein: The switch module includes: a control end, a switch module input end connected to the first output end, and a switch module output end connected to the second output end; the control end transmits the cutoff potential of the switch module in the anti-peeping display mode, and transmits the on-potential of the switch module in the normal display mode.

8. The display panel according to claim 7, wherein: The switch module includes: a first transistor; a gate of the first transistor is connected to the control end, a first electrode of the first transistor is connected to the first output end, and a second electrode of the first transistor is connected to the second output end.

9. The display panel according to claim 8, wherein: The pixel driving module includes a plurality of transistors, and the first transistor has the same channel type as at least some transistors in the pixel driving module.

10. The display panel according to claim 6, wherein: The pixel driving module includes: driver transistor; a first initialization transistor connected to the gate of the driving transistor and receiving a first scanning signal and a first initialization signal; a data writing transistor connected to the first electrode of the driving transistor and receiving a data voltage and a second scanning signal; a threshold compensation transistor connected between the gate electrode and the second electrode of the driving transistor and receiving the second scanning signal; a first light-emitting control transistor connected to the first electrode of the driving transistor and connected to a first power supply voltage and a light-emitting control signal; a second light-emitting control transistor connected between the second electrode of the driving transistor and the first output terminal and receiving the light-emitting control signal; a second initialization transistor connected to the first output terminal and receiving a third scanning signal and a second initialization signal; a third initialization transistor connected to the first electrode or the second electrode of the driving transistor and receiving the third scanning signal and the third initialization signal; A storage capacitor is connected to the gate of the driving transistor and is connected to the first power supply voltage.

11. The display panel according to any one of claims 1 to 10, characterized in that: Also includes: An isolation structure is provided between the array substrate and the light shielding layer, and the isolation structure encloses a plurality of isolation openings; Wherein, each of the light-emitting devices is at least partially disposed in the corresponding isolation opening.

12. The display panel according to claim 11, wherein: Also includes: an encapsulation layer, disposed between the light-emitting device layer and the light-shielding layer and covering the isolation structure; The encapsulation layer includes: a first encapsulation layer comprising a plurality of encapsulation portions corresponding one to each of the light-emitting devices, the encapsulation portions being arranged on a side of the corresponding light-emitting device away from the array substrate and extending through a sidewall of the isolation structure to a side of the isolation structure away from the array substrate; a second packaging layer, provided on a side of the first packaging layer away from the array substrate, covering the isolation structure and each of the packaging parts; The third encapsulation layer is arranged on a side of the second encapsulation layer away from the array substrate, covering the second encapsulation layer; wherein the light shielding layer is arranged on a side of the third encapsulation layer away from the array substrate.

13. The display panel according to claim 11, wherein: The isolation structure includes an isolation portion and a blocking portion stacked in a direction away from the array substrate; the blocking portion has a width greater than that of the isolation portion, and an orthographic projection of the isolation portion on the array substrate is located within an orthographic projection of the blocking portion on the array substrate; The isolation structure further includes a base portion located on a side of the isolation portion close to the array substrate, the base portion being protruding relative to the isolation portion in a direction toward the isolation opening, and an orthographic projection of the isolation portion on the array substrate being located within an orthographic projection of the base portion on the array substrate; The display panel further includes: a pixel defining layer disposed between the isolation structure and the array substrate; the pixel defining layer is provided with a plurality of pixel openings respectively connected to the isolation openings, and each of the light-emitting devices is at least partially disposed in each of the pixel openings; The light emitting device comprises: an anode, a light emitting structure and a cathode stacked in a direction away from the array substrate; the anode is connected to the pixel circuit in the sub-pixel where it is located.

14. A method for driving a display panel, characterized in that: A plurality of sub-pixels are provided in the display panel, the sub-pixels including an anti-peeping unit and a non-anti-peeping unit, the display panel including an array substrate, a light-emitting device layer and a light-shielding layer which are stacked in sequence; a plurality of pixel circuits corresponding to the sub-pixels are formed in the array substrate; the light-emitting device layer includes a plurality of light-emitting devices; the light-emitting devices include a first light-emitting device corresponding to the anti-peeping unit and a second light-emitting device corresponding to the non-anti-peeping unit; the light-shielding layer includes a light-blocking structure arranged around at least a portion of the structure of the first light-emitting device; the light-blocking structure is arranged on a portion of the light path corresponding to the first light-emitting device; the pixel circuit includes a pixel driving module and a switch module; the first light-emitting device is connected to the pixel driving module; the switch module includes a control end, a switch module input end connected to the pixel driving module and a switch module output end connected to the second light-emitting device; The display panel driving method includes: In Privacy Display mode: Controlling the control end to transmit the cutoff potential of the switch module so that each of the switch modules is turned off; controlling the pixel driving modules in each of the sub-pixels to output a driving current to drive each of the first light-emitting devices to operate; In normal display mode: Controlling the control end to transmit the conduction potential of the switch module so that each of the switch modules is turned on; The pixel driving modules in each of the sub-pixels are controlled to output a driving current to drive each of the first light-emitting devices and each of the second light-emitting devices to operate.

15. A method for preparing a display panel, wherein the display panel is provided with a plurality of sub-pixels, wherein the sub-pixels include an anti-peeping unit and a non-anti-peeping unit; The method for preparing the display panel includes: An array substrate is provided; a plurality of pixel circuits corresponding to the sub-pixels are formed in the array substrate; An isolation structure is formed on one side of the array substrate; wherein the isolation structure encloses a plurality of isolation openings; A light-emitting device layer is formed on one side of the array substrate; wherein the light-emitting device layer includes a plurality of light-emitting devices, each of which is at least partially disposed in a corresponding isolation opening; the light-emitting devices include a first light-emitting device corresponding to the privacy protection unit and a second light-emitting device corresponding to the non-privacy protection unit; forming an encapsulation layer on a side of the light-emitting device layer away from the array substrate; wherein the encapsulation layer covers each of the light-emitting devices and the isolation structure; A light-shielding layer is formed on a side of the encapsulation layer away from the array substrate; wherein the light-shielding layer includes a light-blocking structure arranged around at least a portion of the structure of the first light-emitting device; the light-blocking structure is arranged on a portion of the light path corresponding to the first light-emitting device; wherein the pixel circuit drives the first light-emitting device to operate and turns off the second light-emitting device in the anti-peep display mode, and drives the first light-emitting device and the second light-emitting device to operate in the normal display mode.

16. A display device, characterized in that: include: The display panel according to any one of claims 1 to 13.

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