Display panel, display driving method, display driver, display module and electronic equipment

Abstract

The invention provides a display panel, a display driving method, a display driver, a display module and electronic equipment, and belongs to the field of display technologies. The display panel comprises a substrate and a plurality of pixels, wherein each pixel comprises a plurality of sub-pixels; each sub-pixel comprises a first electrode layer, an organic light-emitting layer and a second electrode layer which are sequentially arranged on the substrate in a stacked mode. The first electrode layer comprises a main electrode, an auxiliary electrode and a partition layer, the auxiliary electrode is arranged around the main electrode, the partition layer is arranged between the auxiliary electrode and the main electrode, and the auxiliary electrode and the main electrode are insulated from each other. In the embodiment of the invention, the main electrode and the auxiliary electrode can be independently controlled, and when an unexpected organic light-emitting material is deposited above the first electrode layer of the sub-pixel, namely vapor plating color mixing occurs, the organic light-emitting layer corresponding to the auxiliary electrode is controlled not to emit light, so that the adverse effect of vapor plating color mixing on the display effect of the display panel can be effectively improved, and the display effect of the display panel is improved. And the display effect of the display panel is ensured.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel, a display driving method, a display driver, a display module, and an electronic device. Background Technology

[0002] Currently, the organic light-emitting layer in organic light-emitting diode (OLED) panels is typically fabricated using vacuum evaporation technology. That is, a high-precision metal mask (FMM) is used to deposit organic materials (e.g., red, green, and blue organic light-emitting materials) onto the substrate in a vacuum environment. If the position of the high-precision metal mask shifts during the evaporation process, color mixing will occur, affecting the display panel's performance. Summary of the Invention

[0003] This application provides a display panel, a display driving method, a display driver, a display module, and an electronic device to improve or even overcome the adverse effects of vapor deposition color mixing on the display effect of the display panel.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, a display panel is provided. The display panel includes a substrate and a plurality of pixels, each pixel including a plurality of sub-pixels; wherein, each sub-pixel includes a first electrode layer, an organic light-emitting layer and a second electrode layer sequentially stacked on the substrate; the first electrode layer includes a main electrode, an auxiliary electrode and a partition layer, the auxiliary electrode being disposed around the main electrode, the partition layer being disposed between the auxiliary electrode and the main electrode, and the auxiliary electrode and the main electrode being insulated from each other.

[0006] In this embodiment, the first electrode layer formed on the substrate includes a main electrode and an auxiliary electrode, with the auxiliary electrode surrounding the main electrode and the main electrode and auxiliary electrode disconnected. The main electrode and auxiliary electrode can be controlled independently. When the precision of the vapor deposition process deviates and undesirable organic light-emitting material is deposited above the first electrode layer of the sub-pixel, only the driving current is applied to the main electrode. This controls only the organic light-emitting layer corresponding to the main electrode in the sub-pixel to emit light, while the organic light-emitting layer corresponding to the auxiliary electrode in the sub-pixel does not emit light. This effectively improves the adverse effects of vapor deposition color mixing on the display panel's display effect, ensuring the display panel's display performance.

[0007] In some possible implementations, the first electrode layer is an anode layer, and the second electrode layer is a cathode layer. The anode layer is used to receive the power supply voltage, and the cathode layer is used to receive the common ground voltage.

[0008] In some possible implementations, the spacing between the main electrode and the auxiliary electrode is less than or equal to 2 micrometers. This effectively isolates the main electrode from the auxiliary electrode, reducing their mutual interference.

[0009] In some possible implementations, the display panel further includes a pixel defining layer disposed on the substrate, the pixel defining layer including a plurality of grooves, each groove containing a sub-pixel; the outward extension distance of the auxiliary electrode is less than or equal to 5 micrometers.

[0010] In some possible implementations, the display panel further includes a first driving circuit and a second driving circuit; wherein the first driving circuit is electrically connected to the main electrode, and the second driving circuit is electrically connected to the auxiliary electrode. Through the first driving circuit and the second driving circuit, embodiments of this application can independently control the main electrode and the auxiliary electrode.

[0011] In some possible implementations, the first driving circuit is configured to apply a first driving current to the main electrode to control the organic light-emitting layer corresponding to the main electrode to emit light. In the embodiments of this application, regardless of whether the sub-pixel undergoes vapor deposition color mixing, when a sub-pixel needs to be lit, the first driving circuit applies a first driving current to the main electrode to at least control the organic light-emitting layer corresponding to the main electrode to emit light.

[0012] In some possible implementations, the sub-pixel includes a first sub-pixel and a second sub-pixel, wherein the first sub-pixel and the second sub-pixel emit different colors. The second driving circuit is configured to: if the projection of the auxiliary electrode of the first sub-pixel onto the substrate does not overlap with the projection of the organic light-emitting layer of the second sub-pixel, apply a second driving current to the auxiliary electrode to control the organic light-emitting layer corresponding to the auxiliary electrode in the first sub-pixel to emit light; if the projection of the auxiliary electrode of the first sub-pixel onto the substrate overlaps with the projection of the organic light-emitting layer of the second sub-pixel, control the organic light-emitting layer corresponding to the auxiliary electrode in the first sub-pixel to not emit light.

[0013] In this embodiment, if the first sub-pixel to be illuminated is an unmixed sub-pixel, the second driving circuit applies a second driving current to the auxiliary electrode to control the organic light-emitting layer corresponding to the auxiliary electrode to emit light. Conversely, if the first sub-pixel to be illuminated is a mixed-color sub-pixel, the second driving circuit does not apply a driving current to the auxiliary electrode to control the organic light-emitting layer corresponding to the auxiliary electrode not to emit light. This effectively mitigates the adverse effects of vapor deposition color mixing on the display panel's display effect, ensuring the display panel's performance.

[0014] In some possible implementations, the first drive current, the second drive current, the area of ​​the main electrode, and the area of ​​the auxiliary electrode satisfy the following: Where i1 is the first driving current, i2 is the second driving current, S1 is the area of ​​the main electrode, and S2 is the area of ​​the auxiliary electrode. Thus, when a sub-pixel needs to emit light, the organic light-emitting layers corresponding to the main electrode and the auxiliary electrode can emit light with the same brightness.

[0015] Secondly, a display driving method is provided. This method is applied to a display driver and includes: if the projection of the auxiliary electrode of a first sub-pixel onto the substrate does not overlap with the projection of the organic light-emitting layer of a second sub-pixel, then applying a second driving voltage to a second driving circuit, the second driving voltage being used to control the second driving circuit to apply a second driving current to the auxiliary electrode of the sub-pixel; if the projection of the auxiliary electrode of the first sub-pixel onto the substrate overlaps with the projection of the organic light-emitting layer of the second sub-pixel, then applying a third driving voltage to the second driving circuit, the third driving voltage being used to control the second driving circuit not to apply driving current to the auxiliary electrode.

[0016] Thirdly, a display driver is provided. The display driver includes a processor and a memory, the memory for storing computer programs, and the processor for calling and executing the computer programs in the memory to perform the display driving method described in the second aspect above.

[0017] Fourthly, a display module is provided. The display module includes a display panel according to any one of the first aspects above, and a display driver according to the third aspect above, wherein the display driver is coupled to the display panel and is used to control the display panel.

[0018] Fifthly, an electronic device is provided. The electronic device includes a device housing and a display module as described in the fourth aspect above, the display module being mounted on the device housing.

[0019] It should be understood that the technical effects of the second to fifth aspects can be referred to the technical effects of the first aspect and any of its embodiments, and will not be repeated here. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of a display module provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram of a sub-pixel layer structure provided in an embodiment of this application.

[0024] Figure 5A cross-sectional schematic diagram of a sub-pixel provided in an embodiment of this application;

[0025] Figure 6 A schematic diagram illustrating the principle of a vapor deposition process provided in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the sub-pixel structure without vapor deposition and color mixing provided in an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the sub-pixel structure for vapor deposition color mixing provided in an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of the structure of the first electrode layer in a sub-pixel provided in an embodiment of this application;

[0029] Figure 10 This is a schematic diagram showing the connection between the first electrode layer and the driving circuit provided in an embodiment of this application;

[0030] Figure 11 A schematic diagram illustrating the light emission of the mixed-color sub-pixel as provided in an embodiment of this application;

[0031] Figure 12 A flowchart illustrating a display driving method provided in an embodiment of this application;

[0032] Figure 13 A schematic diagram showing the voltage application of the first and second driving circuits when mixing colors without vapor deposition, as provided in the embodiments of this application.

[0033] Figure 14 This is a schematic diagram showing the voltage application of the first driving circuit and the second driving circuit during vapor deposition color mixing, as provided in the embodiments of this application.

[0034] Reference numerals: 100, electronic device; 110, display module; 120, device housing; 121, mid-frame; 122, back cover; 210, display panel; 220, display driver; 310, substrate; 320, pixel; 321, sub-pixel; 410, organic light-emitting layer; 420, anode layer; 430, cathode layer; 440, first auxiliary layer; 441, hole injection layer; 442, hole transport layer; 450, second auxiliary layer; 451, electron transport layer; 452, electron injection layer; 460, pixel confinement layer; 461, groove; 510, main electrode; 520, auxiliary electrode; 530, partition layer; 610, first driving circuit; 611, first transistor; 612, second transistor; 613, first capacitor; 620, second driving circuit. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] The terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0037] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0038] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0039] This application provides an electronic device, which may be, for example, a consumer electronics product with a display function, a home electronics product, an in-vehicle electronics product, or a financial electronics product. Consumer electronics products include mobile phones, tablets, laptops, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop monitors, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality (VR) electronic devices, augmented reality (AR) electronic devices, drones, etc. Home electronics products include smart door locks, televisions, remote controls, refrigerators, and rechargeable small household appliances (e.g., soymilk makers, robot vacuum cleaners), etc. In-vehicle electronic products include in-vehicle navigation systems, in-vehicle high-density digital video discs (DVDs), etc. Financial electronics products include automated teller machines (ATMs), self-service electronic devices, etc. This application does not impose any special limitations on the specific form of the above-mentioned electronic devices.

[0040] For ease of explanation, the following uses electronic devices as an example. Figure 1Taking the mobile phone shown as an example, the aforementioned electronic device 100 includes a display module 110 and a device housing 120. The device housing 120 includes a mid-frame 121 and a back cover 122, with the mid-frame 121 located between the display module 110 and the back cover 122. The display module 110 and the back cover 122 are respectively connected to the mid-frame 121. The cavity formed between the back cover 122 and the mid-frame 121 is used to accommodate electronic components such as a battery, a camera module, and a printed circuit board (PCB).

[0041] It should be understood that the structure in the above-mentioned electronic device 100 is not limited to the above-mentioned display module 110, mid-frame 121 and back cover 122, etc., and may also include other structures, such as small board, battery cover, user identity module (SIM) etc., and the embodiments of this application do not impose special limitations.

[0042] For any of the aforementioned electronic devices 100, the display module 110 is mainly used to display images, videos, etc. For example... Figure 2 As shown, the display module 110 includes a display panel 210 and a display driver 220. The display driver 220 is coupled to the display panel 210 and is used to control the display panel 210 to display images and videos. In some embodiments, the display panel 210 can be an organic light-emitting diode (OLED) display panel, a micro OLED display panel, a quantum dot light-emitting diode (QLED) display panel, or the like.

[0043] like Figure 3 As shown, the display panel 210 may include a substrate 310 and a plurality of pixels 320 disposed on the substrate 310. Each pixel 320 may include a sub-pixel 321; in some examples, each pixel 320 may include a red (red, R) sub-pixel for emitting red light, a green (green, G) sub-pixel for emitting green light, and a blue (blue, B) sub-pixel for emitting blue light.

[0044] like Figure 4As shown, sub-pixel 321 may include an organic light-emitting layer 410, a metal anodic layer 420, and a transparent cathode layer 430. The organic light-emitting layer 410, the anodic layer 420, and the cathode layer 430 are stacked, with the organic light-emitting layer 410 located between the anodic layer 420 and the cathode layer 430. The difference between the red, green, and blue sub-pixels lies in the different materials used in the organic light-emitting layer 410. In some embodiments, a first auxiliary layer 440 is further disposed between the anodic layer 420 and the organic light-emitting layer 410, and a second auxiliary layer 450 is further disposed between the organic light-emitting layer 410 and the cathode layer 430.

[0045] For any sub-pixel 321, when current passes through the organic light-emitting layer 410, electrons and holes (positive charges) move and combine from the anode layer 420 and cathode layer 430 to the central organic light-emitting layer 410, forming high-energy excitons. The excitons generated in the organic light-emitting layer 410 activate the organic molecules within it, causing the outermost electrons of the organic molecules to transition from the ground state to an excited state. Since excited electrons are extremely unstable, they will transition back to the ground state, releasing energy as light during this transition, thus achieving light emission. By controlling the luminescence intensity of the red, green, and blue sub-pixels, the three colors of light can be mixed in different proportions, allowing each pixel 320 to emit light of various colors.

[0046] In some embodiments, an anode layer 420 and a pixel definition layer (PDL) 460 are formed on a substrate 310 by sputtering an anode material such as indium tin oxide (ITO) or silver (Ag) onto the substrate 310 and then performing a photolithography process; wherein the pixel definition layer 460 can be formed using materials such as polyimide, bisphenol A polycarbonate, or acrylic. Figure 5 As shown, the pixel limiting layer 460 has multiple grooves 461, and the anode layer 420 region enclosed by the pixel limiting layer 460 can be used as the evaporation region of organic light-emitting material. A sub-pixel 321 is disposed in each groove 461.

[0047] In some embodiments, the vapor deposition process first requires removing dirt and impurities from the substrate 310 and using plasma to remove residual anode material. Then, a first auxiliary layer 440 is deposited over the entire substrate; wherein the first auxiliary layer 440 may include a hole injection layer (HIL) 441 and a hole transport layer (HTL) 442 deposited sequentially. Subsequently, as... Figure 6As shown, a fine metal mask made of Invar steel (i.e., an iron-nickel alloy) covers the substrate 310. Organic light-emitting material within the evaporation source is evaporated by resistance wire heating or electron beam heating. The evaporated organic light-emitting material is deposited through openings in the fine metal mask onto the anode layer 420 of the corresponding sub-pixel 321, forming the organic light-emitting layer 410. By changing the fine metal mask, desired organic light-emitting materials (such as red, green, and blue organic light-emitting materials) can be selectively deposited onto the anode layer 420 of the corresponding sub-pixel 321 sequentially. An example is shown below. Figure 7 As shown, during normal vapor deposition, in the projection direction of the substrate 310, the anode layer 420 of any sub-pixel 321 does not overlap with the organic light-emitting layer 420 of other sub-pixels 321. After the organic light-emitting layer 410 is vapor-deposited, the second auxiliary layer 450 is vapor-deposited; wherein, the second auxiliary layer 450 may include an electron transport layer (ETL) 451 and an electron injection layer (EIL) 452 that are vapor-deposited sequentially. Finally, the cathode layer 430 is vapor-deposited, thereby forming the sub-pixel 321.

[0048] It should be noted that, in the embodiments described in this application, "above" refers to the stacking direction of the various layer structures of the sub-pixel on the substrate.

[0049] The vapor deposition process requires ensuring high precision. During the deposition of organic light-emitting materials, if the pixel position accuracy (PPA) of the fine metal mask shifts or the shadow area increases, undesirable organic light-emitting material will be deposited above the anode layer 420 of adjacent sub-pixels 321. For example, as... Figure 8 As shown, during the deposition of red organic light-emitting material, if the pixel position accuracy of the fine metal mask shifts or the deposition shadow area increases, the red organic light-emitting material may deposit above the anode layer 420 of the adjacent green sub-pixel. When a driving current is applied to the anode layer 420 of the green sub-pixel, the driving current excites both the red organic light-emitting material (the undesired organic light-emitting material) and the green organic light-emitting material (the desired organic light-emitting material), emitting red and green light. The mixing of red and green light may cause the green sub-pixel to emit yellow light, ultimately affecting the display effect of the display panel 210.

[0050] In this embodiment, the first electrode layer includes a main electrode and an auxiliary electrode, with the auxiliary electrode arranged around the main electrode, and the main electrode and auxiliary electrode disconnected. The main electrode and auxiliary electrode can be controlled independently. When the precision of the vapor deposition process deviates, and undesirable organic light-emitting material is deposited above the first electrode layer of the sub-pixel, only the driving current is applied to the main electrode. This controls only the organic light-emitting layer corresponding to the main electrode in the sub-pixel to emit light, while the organic light-emitting layer corresponding to the auxiliary electrode in the sub-pixel does not emit light. This effectively improves the adverse effects of vapor deposition color mixing on the display panel's display effect, ensuring the display panel's display performance.

[0051] like Figure 9 As shown in the embodiment of this application, the sub-pixel 321 includes a first electrode layer, an organic light-emitting layer 410, and a second electrode layer sequentially disposed on the substrate 310. The first electrode layer is an anode layer 420, and the second electrode layer is a cathode layer 430. The first electrode layer includes a main electrode 510 and an auxiliary electrode 520, with the auxiliary electrode 520 surrounding the main electrode 510. The main electrode 510 and the auxiliary electrode 520 can be separated by etching, and then a PDL material is filled between the main electrode 510 and the auxiliary electrode 520 to form a partition layer 530 (also called an auxiliary (sub) pixel defining layer). The partition layer 530 isolates the main electrode 510 and the auxiliary electrode 520; that is, the auxiliary electrode 520 is insulated from the main electrode 510.

[0052] In some embodiments, the width of the partition layer 530 is less than or equal to 2 micrometers; that is, the distance between the main electrode 510 and the auxiliary electrode 520 is less than or equal to 2 micrometers. In some embodiments, the distance between the partition layer 530 and the pixel defining layer 460 on the plane of the substrate 310 is less than or equal to 5 micrometers; that is, the outward extension distance of the auxiliary electrode 520 is less than or equal to 5 micrometers.

[0053] It should be understood that in other embodiments, the first electrode layer is a cathode layer 430 and the second electrode layer is an anode layer 420.

[0054] like Figure 10 As shown, in some embodiments, the substrate 310 includes a first driving circuit 610 and a second driving circuit 620 having a thin film transistor (TFT); the substrate 310 may also be referred to as a TFT substrate 310. The first driving circuit 610 is connected to the main electrode 510 of the sub-pixel 321 through a contact hole, and the second driving circuit 620 is connected to the auxiliary electrode 520 of the sub-pixel 321 through a contact hole.

[0055] As mentioned above, during the deposition of organic light-emitting materials, if the pixel position accuracy of the fine metal mask shifts or the deposition shadow area increases, undesirable organic light-emitting materials will be deposited above the first electrode layer of sub-pixel 321. Figure 9 As shown, in some examples, the auxiliary electrode 520 of the first sub-pixel 321 is covered by the organic light-emitting layer 410 of the second sub-pixel 321; wherein, the auxiliary electrode 520 of the first sub-pixel 321 being covered by the organic light-emitting layer 410 of the second sub-pixel 321 means that, along a direction perpendicular to the plane of the substrate 310, the projection of the organic light-emitting layer 410 of the second sub-pixel 321 partially overlaps with the auxiliary electrode 520 (or even the main electrode 510) of the first sub-pixel 321. The first sub-pixel 321 and the second sub-pixel 321 emit different colors. In this case, the first sub-pixel 321 can be referred to as the sub-pixel with mixed colors.

[0056] In this embodiment, when the first sub-pixel 321 to be mixed with color needs to emit light, only the first driving circuit 610 applies a first driving current to the main electrode 510, thereby controlling the organic light-emitting layer 410 corresponding to the main electrode 510 of the first sub-pixel 321 (i.e., the sub-pixel to be mixed with color) to emit light. The second driving circuit 620, however, does not apply a driving current to the auxiliary electrode 520, thereby controlling the organic light-emitting layer 410 corresponding to the auxiliary electrode 520 of the first sub-pixel 321 not to emit light (e.g., ...). Figure 11 As shown in the figure, this weakens or even eliminates the adverse effects of vapor deposition color mixing on the display panel 210, thus ensuring the display effect of the display panel 210.

[0057] In other examples, the auxiliary electrode 520 of the first sub-pixel 321 is not covered by the organic light-emitting layer 410 of the second sub-pixel 321; that is, along the direction perpendicular to the plane of the substrate 310, the projection of the organic light-emitting layer 410 of the second sub-pixel 321 does not overlap with the auxiliary electrode 520 of the first sub-pixel 321. In this case, the first sub-pixel 321 can be referred to as a normal sub-pixel 321.

[0058] In this embodiment, when the normal first sub-pixel 321 needs to emit light, not only does the first driving circuit 610 apply a first driving current to the main electrode 510, thereby controlling the organic light-emitting layer 410 corresponding to the main electrode 510 of the first sub-pixel 321 (i.e., the normal sub-pixel 321) to emit light, but the second driving circuit 620 also applies a driving current to the auxiliary electrode 520, thereby controlling the organic light-emitting layer 410 corresponding to the auxiliary electrode 520 of the first sub-pixel 321 to emit light.

[0059] In some embodiments, the first driving current, the second driving current, the area of ​​the main electrode 510, and the area of ​​the auxiliary electrode 520 satisfy the following:

[0060]

[0061] Where i1 is the first driving current, i2 is the second driving current, S1 is the area of ​​the main electrode 510, and S2 is the area of ​​the auxiliary electrode 520.

[0062] The aforementioned display driver 220 is coupled to the display panel 210. In some examples, the display driver 220 is, for example, a display driver integrated circuit (DDIC). The display driver 220 provided in this application embodiment is used to provide various control voltages to the first driving circuit 610 and the second driving circuit 620 in the display panel 210. The display driver 220 includes a processor and a memory. The memory is used to store computer programs, and the processor is used to call and execute the computer programs in the memory to perform the display driving method provided in this application embodiment. Figure 12 As shown, the method includes S110-S120, as follows:

[0063] S110, The display driver applies a first driving voltage to the first driving circuit based on the received raw sub-pixel data.

[0064] In some implementations, the display driver 220 can determine the control voltage applied to the display panel 210 based on the raw subpixel data, thereby controlling the brightness of the subpixel 321. In some examples, the raw subpixel data may come from the graphics processing unit (GPU) or application processor (AP) of the electronic device 100.

[0065] The first driving voltage Vdata1 is related to the original sub-pixel data. In some embodiments, the display driver 220 is configured with a mapping relationship between the original sub-pixel data and the first driving voltage Vdata1. As shown in Table 1 below, based on the mapping relationship, the display driver 220 can apply the first driving voltage Vdata1 to the first driving circuit 610 according to the original sub-pixel data.

[0066] Table 1

[0067]

[0068] like Figure 13As shown, in some embodiments, the first driving circuit 610 includes a first transistor 611, a second transistor 612, and a first capacitor 613. The first transistor 611 and the second transistor 612 are P-type transistors. The control terminal of the first transistor 611 receives the scan voltage Vscan applied by the display driver 220. The first terminal of the first transistor 611 receives the first driving voltage Vdata1. The second terminal of the first transistor 611 is coupled to the first terminal of the first capacitor 613 and the control terminal of the second transistor 612, respectively. The second terminal of the first capacitor 613 is coupled to the first terminal of the second transistor 612 and receives the power supply voltage ELVDD. The second terminal of the third transistor is coupled to the main anode of the sub-pixel 321, and the cathode of the sub-pixel 321 receives the common ground voltage ELVSS.

[0069] In some examples, when the first transistor 611 receives the scan voltage Vscan and is turned on, the first driving voltage Vdata1 charges the first capacitor 613, thereby writing the first driving voltage Vdata1 into the first capacitor 613. The first driving voltage Vdata1 is applied to the control terminal of the second transistor 612, controlling the second transistor 612 to saturate and conduct, thereby causing the first driving circuit 610 to apply a first driving current I1 to the main electrode 510, and thus controlling the organic light-emitting layer 410 corresponding to the main electrode 510 to emit light; where I1 = k(Vdata1 - ELVDD). 2 ; where k is related to the inherent parameters of the second transistor 612 (e.g., channel length, channel width, and gate oxide capacitance).

[0070] S120. If the projection of the auxiliary electrode of the first sub-pixel and the organic light-emitting layer of the second sub-pixel on the substrate does not overlap, the display driver applies a second driving voltage to the second driving circuit based on the received original sub-pixel data; if the projection of the auxiliary electrode of the first sub-pixel and the organic light-emitting layer of the second sub-pixel on the substrate overlap, the display driver applies a third driving voltage to the second driving circuit.

[0071] The second driving voltage Vdata2 is related to the original sub-pixel data. In some embodiments, the display driver 220 is configured with a mapping relationship between the original sub-pixel data and the second driving voltage Vdata2, and is configured with selection information for indicating whether the sub-pixel 321 corresponding to the original sub-pixel data is a sub-pixel that has been mixed with other colors. For example, if the projection of the auxiliary electrode 520 of the first sub-pixel 321 and the organic light-emitting layer 410 of the second sub-pixel 321 onto the substrate 310 does not overlap, then the first sub-pixel 321 is a normal sub-pixel 321 that has not been mixed with other colors. Conversely, if the projection of the auxiliary electrode 520 of the first sub-pixel 321 and the organic light-emitting layer 410 of the second sub-pixel 321 onto the substrate 310 overlaps, then the first sub-pixel 321 is a sub-pixel that has been mixed with other colors.

[0072] As shown in Table 1, in some examples, if the selected information indicator sub-pixel 321 is an unmixed sub-pixel, then based on the mapping relationship, the display driver 220 can apply a second driving voltage Vdata2 to the second driving circuit 620 according to the original sub-pixel data. For example, Figure 13 As shown, the circuit structure of the second driving circuit 620 can be the same as that of the first driving circuit 610 described above. Therefore, the circuit structure of the second driving circuit 620 will not be described in detail here. The second driving voltage Vdata2 can control the second driving circuit 620 to apply a second driving current I2 to the auxiliary electrode 520; thereby controlling the organic light-emitting layer 410 corresponding to the auxiliary electrode 520 to emit light, where I2 = k(Vdata2 - ELVDD). 2 .

[0073] like Figure 14 As shown, in some examples, if the selected information indicator sub-pixel 321 is the sub-pixel being mixed, the display driver 220 applies a third driving voltage Vdata3 to the second driving circuit 620. The third driving voltage Vdata3 is applied to the control terminal of the second transistor 612 in the second driving circuit 620, and the control second transistor 612 in the second driving circuit 620 is turned off, thereby preventing the second driving circuit 620 from applying driving current to the auxiliary electrode 520, and thus controlling the organic light-emitting layer 410 corresponding to the auxiliary electrode 520 to emit light.

[0074] It should be understood that S110 and S120 have no logical order; they can be executed simultaneously, or either one can be executed first.

[0075] In this embodiment, the first electrode layer includes a main electrode 510 and an auxiliary electrode 520. The auxiliary electrode 520 is disposed around the main electrode 510, and the main electrode 510 and the auxiliary electrode 520 are disconnected. The main electrode 510 and the auxiliary electrode 520 can be controlled independently. When the sub-pixel to be mixed needs to emit light, only the first driving circuit 610 applies a first driving current to the main electrode 510, thereby controlling the organic light-emitting layer 410 corresponding to the main electrode 510 of the sub-pixel to emit light. The second driving circuit 620 does not apply a driving current to the auxiliary electrode 520, thereby controlling the organic light-emitting layer 410 corresponding to the auxiliary electrode 520 of the sub-pixel to not emit light, thus weakening or even eliminating the adverse effects of vapor deposition mixing on the display effect of the display panel 210, and ensuring the display effect of the display panel 210.

[0076] In the embodiments provided in this application, it should be understood that the disclosed display panel, display driving method, display driver, display module, and electronic device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection between devices or modules may be electrical, mechanical, or other forms.

[0077] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located on one device or distributed across multiple devices. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0078] In addition, the functional modules in the various embodiments of this application can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0079] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, The device includes a substrate and multiple pixels, each pixel including multiple sub-pixels; wherein, each sub-pixel includes a first electrode layer, an organic light-emitting layer and a second electrode layer sequentially stacked on the substrate; the first electrode layer includes a main electrode, an auxiliary electrode and a partition layer, the auxiliary electrode is disposed around the main electrode, the partition layer is disposed between the auxiliary electrode and the main electrode, and the auxiliary electrode and the main electrode are insulated from each other.

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

3. The display panel according to claim 1 or 2, characterized in that, The distance between the main electrode and the auxiliary electrode is less than or equal to 2 micrometers.

4. The display panel according to any one of claims 1-3, characterized in that, The display panel further includes a pixel defining layer disposed on the substrate, the pixel defining layer having a plurality of grooves, each groove containing a sub-pixel; the outward extension distance of the auxiliary electrode is less than or equal to 5 micrometers.

5. The display panel according to any one of claims 1-4, characterized in that, The display panel further includes a first driving circuit and a second driving circuit; wherein the first driving circuit is electrically connected to the main electrode, and the second driving circuit is electrically connected to the auxiliary electrode.

6. The display panel according to claim 5, characterized in that, The first driving circuit is configured to apply a first driving current to the main electrode and control the organic light-emitting layer corresponding to the main electrode to emit light.

7. The display panel according to claim 5 or 6, characterized in that, The sub-pixel includes a first sub-pixel and a second sub-pixel, and the second driving circuit is configured to: If the projection of the auxiliary electrode of the first sub-pixel and the organic light-emitting layer of the second sub-pixel on the substrate does not overlap, a second driving current is applied to the auxiliary electrode to control the organic light-emitting layer corresponding to the auxiliary electrode in the first sub-pixel to emit light. If the auxiliary electrode of the first sub-pixel overlaps with the projection of the organic light-emitting layer of the second sub-pixel onto the substrate, then the organic light-emitting layer corresponding to the auxiliary electrode in the first sub-pixel is controlled to not emit light. The first sub-pixel emits a different color than the second sub-pixel.

8. The display panel according to claim 7, characterized in that, The first driving current, the second driving current, the area of ​​the main electrode, and the area of ​​the auxiliary electrode satisfy the following: Wherein, i1 is the first driving current, i2 is the second driving current, S1 is the area of ​​the main electrode, and S2 is the area of ​​the auxiliary electrode.

9. A display driving method, characterized in that, Applied to a display driver, the method includes: If the auxiliary electrode of the first sub-pixel and the projection of the organic light-emitting layer of the second sub-pixel on the substrate do not overlap, a second driving voltage is applied to the second driving circuit. The second driving voltage is used to control the second driving circuit to apply a second driving current to the auxiliary electrode of the sub-pixel. If the auxiliary electrode of the first sub-pixel overlaps with the projection of the organic light-emitting layer of the second sub-pixel onto the substrate, a third driving voltage is applied to the second driving circuit. The third driving voltage is used to control the second driving circuit not to drive current to the auxiliary electrode.

10. A display driver, characterized in that, It includes a processor and a memory, the memory being used to store a computer program, and the processor being used to call and execute the computer program in the memory to perform the display driving method as described in claim 9.

11. A display module, characterized in that, The display panel includes the display panel according to any one of claims 1-8, and the display driver according to claim 10, wherein the display driver is coupled to the display panel and is used to control the display panel.

12. An electronic device, characterized in that, It includes a device housing and the display module as described in claim 11, the display module being mounted on the device housing.

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