Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel includes: a substrate; the pixel definition layer comprises a first pixel definition layer and a second pixel definition layer, the first pixel definition layer is located on one side of the substrate, the second pixel definition layer is located on the side, away from the substrate, of the first pixel definition layer, and the transmittance of the first pixel definition layer is smaller than that of the second pixel definition layer; the pixel definition layer is provided with a first pixel opening and a second pixel opening, and at the first pixel opening, the second pixel definition layer covers the edge of the first pixel definition layer; in the second pixel opening, the second pixel definition layer at least does not cover part of the edge of the first pixel definition layer; the light-emitting device comprises a first light-emitting sub-device and a second light-emitting sub-device, the first light-emitting sub-device is located in the first pixel opening, and the second light-emitting sub-device is located in the second pixel opening. The reflectivity of the display panel can be reduced, and the display effect can be improved.

Description

Technical Field

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

[0002] At present, the pixel units of full-color OLED display panels on the market are composed of three primary colors: red, green, and blue. According to the principle of three primary colors, multiple colors can be generated by controlling the red, green, and blue monochrome grayscale of the sub-pixel unit, thereby realizing the display of color images.

[0003] In order to prevent the OLED display panel from reflecting light, a layer of polarizer needs to be set on the light-emitting side. The polarizer uses the principle of polarized light to effectively reduce the reflection intensity of the external environment on the screen, but the transmittance of polarized light is only 40%. In order to achieve a higher light output brightness, the display panel needs more power consumption, and the price of polarizer is relatively high. In addition, the attachment of polarizers requires manual or automatic machine operation. Due to problems in the operation process, a certain number of defective films appear, and there are dust, bubbles in the film, crooked polarizers, etc. The process is difficult, the production yield and efficiency are insufficient, and the production cost of OLED display panels is further increased.

[0004] Based on the above reasons, Figure 1 As shown, the current display panel adopts CFOT (Color Filter On Touch) technology, that is, a color filter (CF) is used to replace the non-polarized technology to reduce power consumption. However, there is no polarizer to suppress reflection, the reflectivity of the display panel is high, and the display effect is not good. Summary of the invention

[0005] In view of the problems in the prior art, an object of the present invention is to provide a display panel and a display device, so as to reduce the reflectivity of the display panel and improve the display effect of the display panel.

[0006] An embodiment of the present invention provides a display panel and a display device, including:

[0007] substrate;

[0008] The pixel definition layer comprises a first pixel definition layer and a second pixel definition layer, wherein the first pixel definition layer is located on one side of the substrate, and the second pixel definition layer is located on the side of the first pixel definition layer away from the substrate, and the transmittance of the first pixel definition layer is less than the transmittance of the second pixel definition layer; the pixel definition layer is provided with a first pixel opening and a second pixel opening, and at the first pixel opening, the second pixel definition layer covers an edge of the second pixel definition layer; at the second pixel opening, the second pixel definition layer does not cover at least a portion of the edge of the second pixel definition layer;

[0009] The light emitting device comprises a first light emitting sub-device and a second light emitting sub-device, wherein the first light emitting sub-device is located in the first pixel opening, and the second light emitting sub-device is located in the second pixel opening.

[0010] In some embodiments, the first light emitting sub-device is a green light emitting sub-device, and the second light emitting sub-device is a red light emitting device or a blue light emitting device.

[0011] In some embodiments, the first pixel opening is located in a first region, and the second pixel opening is located in a second region.

[0012] In some embodiments, the pixel opening includes a first opening provided in the first pixel definition layer and a second opening provided in the second pixel definition layer, and the first opening and the second opening are arranged opposite to each other and are connected to each other.

[0013] In some embodiments, in the first pixel opening, the area of ​​the second opening is smaller than the area of ​​the first opening; in the second pixel opening, the area of ​​the second opening is greater than or equal to the area of ​​the first opening.

[0014] In some embodiments, the first pixel definition layer is a black photoresist layer, and the second pixel definition layer is an organic insulating layer or an inorganic insulating layer.

[0015] In some embodiments, the light emitting device includes an anode layer, a light emitting functional layer located on a side of the anode layer facing away from the substrate, and a cathode layer located on a side of the light emitting functional layer facing away from the substrate.

[0016] In some embodiments, a color filter layer is further included, which is located on the side of the light-emitting device away from the substrate; the color filter layer includes color resistance units arranged in alignment with the light-emitting device, and a shading matrix located between the color resistance units.

[0017] In some embodiments, the substrate includes a driving circuit layer arranged in an array, and the anode layer is electrically connected to the driving circuit layer through a via hole.

[0018] An embodiment of the present invention further provides a display device, comprising the display panel as described above.

[0019] The display panel and display device provided by the present invention have the following advantages:

[0020] The pixel definition layer of the present invention uses a first pixel definition layer and a second pixel definition layer with different transmittances, which can reduce the reflectivity of the display panel, thereby improving the display effect of the display panel. And by utilizing the high dark spot rate of the light-emitting device set in the second pixel opening, the first light-emitting device with obvious dark spots is set in the first pixel opening, so that both the reflectivity of the panel and the dark spot defect rate can be improved simultaneously. And the light-emitting device set in the second pixel opening has a small leakage current, so that the second pixel opening is set in the area where the leakage current of the display panel is detected to be large, and the first pixel opening is set in the area with small leakage current, so that both the reflectivity can be improved and the display defect problem caused by the pixel stealing of the panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0022] Figure 1 is a schematic diagram of a display panel using CFOT technology;

[0023] Figure 2 is a plan view of an organic light emitting display panel provided by an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of a display panel provided with a first pixel opening according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a display panel provided with a second pixel opening according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a pixel driving circuit provided by an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a display device provided by an embodiment of the present invention.

[0028] Reference numerals:

[0029] 10 substrate 30 light emitting device

[0030] 20 Pixel definition layer 30a First light-emitting sub-device

[0031] 20a First pixel opening 30b Second light emitting sub-device

[0032] 20b Second pixel opening 31 Anode layer

[0033] 21 first pixel definition layer 32 organic functional layer

[0034] 211 first opening 33 cathode layer

[0035] 22 second pixel definition layer 40 thin film encapsulation layer

[0036] 221 second opening 50 color filter layer DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0038] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] It should be further understood that the terms "comprises" and "includes" indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0041] In order to solve the problems in the prior art, an embodiment of the present invention provides a display panel. The display panel includes: a substrate; a pixel definition layer, including a first pixel definition layer and a second pixel definition layer, the first pixel definition layer is located on one side of the substrate, the second pixel definition layer is located on the side of the first pixel definition layer away from the substrate, and the transmittance of the first pixel definition layer is less than the transmittance of the second pixel definition layer; the pixel definition layer is provided with a first pixel opening and a second pixel opening, in the first pixel opening, the second pixel definition layer covers the edge of the second pixel definition layer; in the second pixel opening, the second pixel definition layer does not cover at least part of the edge of the second pixel definition layer; a light-emitting device, including a first light-emitting sub-device and a second light-emitting sub-device, the first light-emitting sub-device is located in the first pixel opening, and the second light-emitting sub-device is located in the second pixel opening. The pixel definition layer of the present invention uses a first pixel definition layer and a second pixel definition layer with different transmittances, which can reduce the reflectivity of the display panel, thereby improving the display effect of the display panel. In addition, by utilizing the high dark spot rate of the light-emitting device arranged in the second pixel opening, the first light-emitting device with obvious dark spots is arranged in the first pixel opening, thereby improving the reflectivity of the panel and the dark spot defect rate at the same time; and by utilizing the large leakage current of the light-emitting device arranged in the first pixel opening, the second pixel opening is set in the area with the detected large leakage current, thereby improving the reflectivity and the display defect problem caused by the pixel stealing of the panel.

[0042] Figure 2 exemplarily shows a plan view of a display panel. Figure 2 As shown, the display panel 100 includes a display area 110 and a non-display area 120 surrounding the display area 110. The display area 110 is provided with a plurality of light-emitting devices 30 arranged in an array for displaying images, and the non-display area 120 is provided with a driver IC (Integrated Circuit) for driving the light-emitting device 30 to emit light. Exemplarily, the light-emitting device 30 may be a red light-emitting device that emits red light, a green light-emitting device that emits green light, and a blue light-emitting device that emits blue light. When the display panel is a color display screen, the display panel is provided with red light-emitting devices, blue light-emitting devices, and green light-emitting devices arranged in an array. The superposition and mixing of light-emitting devices of three different colors, red, green, and blue, can make the display panel present a variety of colors. Exemplarily, the red, green, and blue light-emitting devices 30 can be specifically arranged in a standard RGB arrangement, a PenTile arrangement, a diamond arrangement, and the like.

[0043] Figure 3 A schematic diagram showing a display panel provided with a first pixel opening according to an embodiment of the present invention is shown; Figure 4 FIG. 1 is a schematic diagram of a display panel provided by an embodiment of the present invention in which a second pixel opening is provided. Figure 3and Figure 4 As shown, the display panel includes:

[0044] substrate 10;

[0045] The pixel definition layer 20 includes a first pixel definition layer 21 and a second pixel definition layer 22. The first pixel definition layer 21 is located on one side of the substrate 10, and the second pixel definition layer 22 is located on the side of the first pixel definition layer 21 away from the substrate 10. The transmittance of the first pixel definition layer 21 is less than the transmittance of the second pixel definition layer 22. The pixel definition layer 20 is provided with a first pixel opening 20a and a second pixel opening 20b. At the first pixel opening 20a, the second pixel definition layer 22 covers the edge of the first pixel definition layer 21; at the second pixel opening 20b, the second pixel definition layer 22 does not cover at least part of the edge of the first pixel definition layer 21.

[0046] The light emitting device 30 includes a first light emitting sub-device 30a and a second light emitting sub-device 30b. The first light emitting sub-device 30a is located in the first pixel opening 20a, and the second light emitting sub-device 30b is located in the second pixel opening 20b.

[0047] The pixel definition layer 20 uses a first pixel definition layer 21 and a second pixel definition layer 22 with different transmittances, which can reduce the reflectivity of the display panel and thus improve the display effect of the display panel.

[0048] When forming the second pixel opening 20b, etching residue problems are prone to occur. The foreign matter left by etching can easily cause the light-emitting device 30 to short-circuit (the foreign matter causes the anode layer and the cathode layer in the light-emitting device to short-circuit). Therefore, the light-emitting device 30 cannot emit light normally, and dark spots appear on the display panel. When forming the first pixel opening 20a, the second pixel definition layer 22 covers the edge of the first pixel definition layer 21, which can improve the dark spots. However, at the same opening ratio, the proportion of the first pixel definition layer 21 is reduced, which will increase the reflectivity of the display panel. Therefore, whether the entire surface of the display panel adopts the setting of the first pixel opening 20a, or the entire surface of the display panel adopts the setting of the second pixel opening 20b, the display effect that satisfies the user will not be achieved.

[0049] Therefore, in some embodiments, the first light emitting sub-device 30a is a green light emitting sub-device, and the second light emitting sub-device 30b is a red light emitting device or a blue light emitting device.

[0050] In an OLED display panel, the brightness of the green light-emitting device accounts for a high proportion. When a dark spot occurs in the green light-emitting device, it is easily recognized by the human eye. Therefore, in order to improve the dark spot and reflectivity problems, the technical solution of the present invention adopts a differentiated design, where the green light-emitting device is arranged in the first pixel opening 20a, and the red light-emitting device and the blue light-emitting device are arranged in the second pixel opening 20b, so as to improve the reflectivity and the dark spot defect rate simultaneously, thereby improving the display effect of the display panel.

[0051] Furthermore, if Figure 3 and Figure 4 As shown, the light emitting device 30 includes an anode layer 31 , a light emitting functional layer 32 located on a side of the anode layer 31 away from the substrate 10 , and a cathode layer 33 located on a side of the light emitting functional layer 32 away from the substrate 10 .

[0052] The anode layer 31 may be, for example, a single-layer structure or a multi-layer structure of a metal film, an alloy film, a metal nitride film, a conductive metal oxide film, and / or a transparent conductive material film. For example, the material of the anode layer 31 may include, for example, silver (Ag), an Ag-containing alloy, aluminum (Al), an Al-containing alloy, aluminum nitride (AlN), tungsten (W), tungsten nitride (WN), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (CrN), molybdenum (Mo), a Mo-containing alloy, titanium (Ti), tantalum (Ta), platinum (Pt), indium tin oxide (ITO), indium zinc oxide (IZO), or the like.

[0053] The light-emitting functional layer 32 may include a stacked hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer and an electron injection layer. The holes emitted by the anode and the electrons emitted by the cathode recombine in the organic light-emitting layer to emit photons to achieve light emission. The organic light-emitting layer may emit red, green or blue light.

[0054] The cathode layer 33 may include a single layer structure or a multilayer structure of a metal film, an alloy film, a metal nitride film, a conductive metal oxide film and / or a transparent conductive material film. For example, the cathode layer 33 may include silver (Ag), an Ag-containing alloy, aluminum (Al), an Al-containing alloy, aluminum nitride (AlN), tungsten (W), tungsten nitride (WN), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (CrN), molybdenum (Mo), a Mo-containing alloy, titanium (Ti), tantalum (Ta), platinum (Pt), indium tin oxide (ITO), indium zinc oxide (IZO) or the like. In a preferred embodiment, the cathode layer 33 is a transparent electrode, and the material of the cathode may be nickel (Ni), chromium (Cr), titanium (Ti), indium tin oxide (ITO), indium zinc oxide (ITZ) or the like. When the cathode layer 33 is a transparent electrode, external light may be transmitted through the cathode and then reflected from the anode.

[0055] Due to the problems of the location of each color light emitting device and the uniformity of the process preparation when the display panel is prepared, when the OLED display panel is normally emitting light, the charges in the corresponding light emitting functional layer 32 between two adjacent light emitting devices will move laterally, which may cause the light emitting device that does not need to emit light to be illuminated due to the charge movement generated by other light emitting devices, thereby causing display problems such as stealing light or color mixing. The light emitting device that steals light or mixes colors has a large leakage current.

[0056] The impedance of the first pixel definition layer 21 is greater than the impedance of the second pixel definition layer 22. At the first pixel opening 20a, the light-emitting functional layer 32 of the light-emitting device 30 is not in contact with the first pixel definition layer 21, and the leakage of the light-emitting device 30 with large leakage will not be improved; at the second pixel opening 20b, the light-emitting functional layer 32 is in contact with the first pixel definition layer 21, and the leakage of the light-emitting device 30 with large leakage will be improved.

[0057] Therefore, in some embodiments, the first pixel opening 20a may be located in the first area, and the second pixel opening 20b may be located in the second area. Here, the first area is an area where the light emitting device in the area is detected to have a small leakage current by the detection device, and the second area is an area where the light emitting device in the area is detected to have a large leakage current by the detection device, and the first area with small leakage current and the area with large leakage current are regularly distributed on the display panel.

[0058] In order to improve the problem of large leakage current in the second area, a second pixel opening 20b is set in the second area, and the second pixel definition layer 22 at least does not include part of the edge of the first pixel definition layer 21. The light-emitting function layer 32 of the second light-emitting sub-device located in the second pixel opening 20b can be in contact with the first pixel definition layer 21, thereby reducing the lateral movement of charges and reducing the leakage current problem of the second light-emitting sub-device 30b. While improving the reflectivity of the display panel, it can also improve the problem of stealing brightness of the display panel and improve the display effect of the display panel.

[0059] Further, the substrate 10 may include a flexible substrate or a rigid substrate. When the substrate 10 is a flexible substrate, the material of the substrate 10 may be polyimide; when the substrate 10 is a rigid substrate, the material of the substrate 10 may be quartz, glass, sapphire, etc. In some embodiments, a buffer layer may be provided on the substrate 10, and the buffer may be, for example, one or more layers of silicon oxide, silicon oxynitride, or silicon nitride. The provision of the buffer layer may prevent impurities from diffusing onto the substrate 10.

[0060] Please continue reading Figure 3 and Figure 4 The pixel opening includes a first opening 211 provided in the first pixel definition layer 21 and a second opening 221 provided in the second pixel definition layer 22 . The first opening 211 and the second opening 221 are arranged opposite to each other and are connected to each other.

[0061] In the first pixel opening 20 a , the area of ​​the second opening 221 is smaller than that of the first opening 211 ; and in the second pixel opening 20 b , the area of ​​the second opening 221 is greater than or equal to that of the first opening 211 .

[0062] The specific process of preparing the first opening 211 is as follows: a mask layer is prepared on the first pixel definition layer 21, and after exposure and development, the area to be etched is exposed, and then the first opening 211 is prepared by dry etching or wet etching.

[0063] The specific process for preparing the second opening 221 is as follows: a second pixel definition layer 22 and a mask layer are sequentially formed on the side of the first pixel definition layer 21 facing away from the substrate 10, the area to be etched is exposed through exposure and development, and then the second opening 221 is prepared by dry etching or wet etching process.

[0064] When the area of ​​the second opening 221 is smaller than or equal to the area of ​​the first opening 211, the first pixel opening 20a is formed, and the second pixel definition layer 22 covers the edge of the first pixel definition layer 21. When the area of ​​the second opening 221 is larger than the area of ​​the first opening 211, the second pixel opening 20b is formed, and the second pixel definition layer 22 does not cover the edge of the first pixel definition layer 21.

[0065] Specifically, the first pixel definition layer 21 is a black photoresist layer, and the second pixel definition layer 22 is a photoresist layer.

[0066] The black light-blocking layer can block external light. The material of the first pixel definition layer 21 includes, for example, a black pigment or a black dye, and the black light-blocking layer has a low transmittance. Due to the setting of the black light-blocking layer, the wiring arranged on the substrate 10 may not be visually recognized by the user. For example, external light may not be able to penetrate the first pixel definition layer 21, and therefore may not be reflected back by the wiring arranged on the substrate 10.

[0067] The second pixel definition layer 22 may include an organic insulating material, such as a polyimide resin (e.g., photoresist), a photoresist, a polyacrylate resin, or an acrylic resin, or may include an inorganic insulating material, such as silicon oxide or silicon nitride. The second pixel definition layer 22 has a high transmittance, and the second pixel definition layer 22 can transmit external light. Accordingly, external light incident on the second pixel definition layer 22 can pass through the second pixel definition layer 22 and be transmitted.

[0068] Furthermore, a thin film encapsulation layer 40 is provided on the side of the pixel definition layer 20 facing away from the substrate 10 to completely cover the light emitting device 30, so that the light emitting device 30 is isolated from water vapor, oxygen, etc. in the environment, thereby improving the reliability and life of the display panel. The thin film encapsulation layer 40 may include a single layer of organic insulating material, a single layer of inorganic insulating material, or an organic insulating material and an inorganic insulating material arranged alternately, which may be specifically arranged according to actual needs and is not specifically limited here.

[0069] Furthermore, if Figure 3 and Figure 4 As shown, the display panel also includes a color filter layer 50, which is located on the side of the light-emitting device 30 away from the substrate 10; the color filter layer 50 includes a color resist unit 51 arranged in alignment with the organic light-emitting layer, and a light shielding matrix 52 located between the color resist units 51. The color resist unit 51 includes a red color resist unit, a green color resist unit and a blue color resist unit, the red color resist unit allows red light to pass through, the green color resist unit allows green light to pass through, and the blue color resist unit allows blue light to pass through. When the organic light-emitting layer emits red light, green light and blue light, a plurality of color resist units 51 are arranged corresponding to each organic light-emitting layer. The light shielding matrix 52 can prevent crosstalk between adjacent light-emitting devices 30 and shield non-light-emitting areas.

[0070] Since the display panel does not include a polarizing plate, the weight and thickness of the display panel can be reduced. In addition, since the polarizing plate is not included, the light emitted by the light emitting device 30 can be visually recognized more brightly, and the display brightness equivalent to that when polarized light is originally provided can reduce the amount of current supplied to the light emitting layer, so the service life of the light emitting device 30 can be relatively increased.

[0071] Furthermore, the display panel 100 further includes a driving circuit layer (not shown in the figure) arranged in an array, and the anode layer 31 is electrically connected to the driving circuit layer through a via hole.

[0072] Specifically, the driving circuit layer is configured to form a plurality of pixel driving circuits, each of which is electrically connected to a light emitting device 30 in a one-to-one correspondence to control the light emitting device 30 to emit light. Figure 5 As shown, the pixel driving circuit includes a transistor (such as Figure 5 The transistors M1 to M8 shown in the figure) and the storage capacitor Cst, the driving circuit layer includes a gate metal layer formed on the transistor, a source and drain metal layer, a plate metal layer of the storage capacitor Cst, and a power signal line ( Figure 5 PVDD signal and PVEE signal), data signal line ( Figure 5 Data signal shown), scanning signal line (such as Figure 5 S1 to S4 signals shown), light control signals (such as Figure 5EM signal shown), initialization signal (such as Figure 5 The material of each metal layer in the driving circuit layer can be aluminum, titanium, molybdenum, copper, nickel or other alloys.

[0073] Furthermore, an embodiment of the present invention also provides a display device, comprising the display panel as described above. Figure 6 FIG. 2 shows a display device provided by an embodiment of the present invention. Figure 6 As shown, the display device 200 includes the display panel 100 as described above, and the display device 200 can obtain all the technical effects of the above-mentioned display panel 100, which will not be repeated here. Specifically, the display device 200 can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the embodiments can be implemented in or associated with a variety of electronic devices. The various electronic devices are, for example (but not limited to), mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, cameras, game consoles, watches, clocks, calculators, TV monitors, flat panel displays, computer monitors, car displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rear-view cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures, etc.

[0074] In summary, the display panel and display device provided by the present invention have the following advantages:

[0075] The pixel definition layer of the present invention uses a first pixel definition layer and a second pixel definition layer with different transmittances, which can reduce the reflectivity of the display panel, thereby improving the display effect of the display panel. And by utilizing the high dark spot rate of the light-emitting device set in the second pixel opening, the first light-emitting device with obvious dark spots is set in the first pixel opening, so that both the reflectivity of the panel and the dark spot defect rate can be improved simultaneously. And the light-emitting device set in the second pixel opening has a small leakage current, so that the second pixel opening is set in the area where the leakage current of the display panel is detected to be large, and the first pixel opening is set in the area with small leakage current. Even if the leakage current of the light-emitting device with large leakage current is reduced, it can not only improve the reflectivity, but also improve the display defect caused by the pixel stealing of the panel.

[0076] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; The pixel definition layer comprises a first pixel definition layer and a second pixel definition layer, wherein the first pixel definition layer is located on one side of the substrate, and the second pixel definition layer is located on a side of the first pixel definition layer away from the substrate, and the transmittance of the first pixel definition layer is less than the transmittance of the second pixel definition layer; the pixel definition layer is provided with a first pixel opening and a second pixel opening, and at the first pixel opening, the second pixel definition layer covers an edge of the first pixel definition layer; At the second pixel opening, the second pixel definition layer at least does not cover a portion of the edge of the first pixel definition layer; The light emitting device comprises a first light emitting sub-device and a second light emitting sub-device, wherein the first light emitting sub-device is located in the first pixel opening, and the second light emitting sub-device is located in the second pixel opening.

2. The display panel according to claim 1, characterized in that: The first light-emitting sub-device is a green light-emitting sub-device, and the second light-emitting sub-device is a red light-emitting device or a blue light-emitting device.

3. The display panel according to claim 1, characterized in that: The first pixel opening is located in the first area, and the second pixel opening is located in the second area.

4. The display panel according to claim 1, characterized in that: The pixel opening includes a first opening provided in the first pixel definition layer and a second opening provided in the second pixel definition layer, and the first opening and the second opening are arranged opposite to each other and are connected to each other.

5. The display panel according to claim 4, characterized in that: In the first pixel opening, the area of ​​the second opening is smaller than the area of ​​the first opening; in the second pixel opening, the area of ​​the second opening is greater than or equal to the area of ​​the first opening.

6. The display panel according to claim 1, characterized in that: The first pixel definition layer is a black photoresist layer, and the second pixel definition layer is an organic insulating layer or an inorganic insulating layer.

7. The display panel according to claim 1, characterized in that: The light emitting device comprises an anode layer, a light emitting functional layer located on a side of the anode layer away from the substrate, and a cathode layer located on a side of the light emitting functional layer away from the substrate.

8. The display panel according to claim 1, characterized in that: It also includes a color filter layer located on the side of the light emitting device away from the substrate; the color filter layer includes color resistance units arranged in alignment with the light emitting device, and a light shielding matrix located between the color resistance units.

9. The display panel according to claim 7, characterized in that: The display panel further comprises a driving circuit layer arranged in an array, and the anode layer is electrically connected to the driving circuit layer through via holes.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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