OLED display panel and display device

Abstract

The application discloses an OLED display panel and a display device. The OLED display panel comprises a back plate and a display function layer group arranged on the back plate. The display function layer group comprises a first display function layer group and a second display function layer group. The first display function layer group is used for forming pixel points on the display panel, and the second display function layer is used for compensating optical characteristics of the pixel points. According to the embodiment of the application, the first display function layer group is used to form the pixel points on the display panel, and then the light emitted by the second display function layer group is used to compensate the optical characteristics of the pixel points formed by the first display function layer group after the light emitted by the first display function layer group is superimposed, so that the brightness and contrast of the pixel points on the display panel are improved, the power consumption is reduced, the space on the back plate is fully utilized, and the display quality of the display panel is improved.

Description

Technical Field

[0001] This invention generally relates to the field of display technology, and more particularly to an OLED display panel and display device. Background Technology

[0002] With the development and advancement of display technology, organic light-emitting devices (OLEDs) are considered the next generation of display technology compared to LCDs. They have advantages such as no need for backlight, high contrast, self-illumination, fast response, wide viewing angle, high brightness, vibrant colors, thinness, applicability to flexible panels, wide operating temperature range, and simpler structure and manufacturing process. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an OLED display panel and display device, which improves the brightness and contrast of the display panel by setting two display functional layer groups on the back panel, such that the first display functional layer group forms pixels on the display panel, and the second display functional layer group can compensate for the optical characteristics of the pixels.

[0004] In a first aspect, embodiments of this application provide an OLED display panel, comprising:

[0005] Back panel and display function layer group disposed on the back panel;

[0006] The display functional layer group includes a first display functional layer group and a second display functional layer group. The first display functional layer group is used to form pixels on the display panel, and the second display functional layer group is used to compensate for the optical characteristics of the pixels.

[0007] Optionally, in the OLED display panel of this application embodiment, the first display functional layer group and the second display functional layer group respectively include an electrode layer, a pixel definition layer and a light-emitting layer, wherein the light-emitting layer constitutes an array of distributed light-emitting areas.

[0008] The orthographic projection of the light-emitting area in the second display functional layer group onto the back panel at least covers the orthographic projection of the pixel definition layer between any two light-emitting areas in the first display functional layer group onto the back panel.

[0009] Optionally, in the OLED display panel of this application embodiment, the light-emitting area of ​​the first display functional layer group includes a red area, a green area, and a blue area.

[0010] The orthographic projection of the light-emitting area in the second display functional layer group onto the back panel covers the orthographic projection of the pixel definition layer between the red and green areas, between the green and blue areas, and between the blue and red areas of the first display functional layer group onto the back panel.

[0011] Optionally, in the OLED display panel of this application embodiment, the light-emitting area of ​​the first display functional layer group includes a red area, a green area, and a blue area.

[0012] The orthographic projection of the luminescent area in the second display functional layer group onto the back panel covers the orthographic projection of the pixel definition layer between the green and blue areas in the first display functional layer group onto the back panel.

[0013] Optionally, in the OLED display panel of this application embodiment, the light-emitting area of ​​the second display functional layer group includes one or more of white, red, green, and blue.

[0014] Optionally, in the OLED display panel of this application embodiment, a metal layer is disposed between the back panel and the display functional layer group, and the first display functional layer group and the electrode layer of the first display functional layer group are respectively connected to the metal layer.

[0015] Optionally, in the OLED display panel of this application embodiment, the first display functional layer group is disposed away from the functional layer group, and the second display functional layer group is disposed close to the back panel.

[0016] Optionally, in the OLED display panel of this application embodiment, a first planarization layer is disposed between the metal layer and the second display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group.

[0017] The electrode layer of the second display functional layer group overlaps with the metal layer through an opening on the first planarization layer, and the middle electrode layer of the first display functional layer group overlaps with the metal layer through the second planarization layer and the opening on the first planarization layer.

[0018] Optionally, in the OLED display panel of this application embodiment, a first planarization layer is disposed between the metal layer and the second display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group.

[0019] The electrode layer of the second display functional layer group overlaps with the metal layer through the opening on the first planarization layer. After the electrode layer of the first display functional layer group overlaps with the electrode layer of the second display functional layer group through the opening on the second planarization layer, it then overlaps with the metal layer.

[0020] Optionally, in the OLED display panel of this application embodiment, the first display functional layer group is disposed close to the functional layer group, and the second display functional layer group is disposed away from the back panel.

[0021] Optionally, in the OLED display panel of this application embodiment, a first planarization layer is disposed between the metal layer and the first display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group.

[0022] The electrode layer of the first display functional layer group overlaps with the metal layer through an opening on the first planarization layer, and the middle electrode layer of the second display functional layer group overlaps with the metal layer through an opening on the second planarization layer and the first planarization layer.

[0023] Optionally, in the OLED display panel of this application embodiment, a first planarization layer is disposed between the metal layer and the first display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group.

[0024] The electrode layer of the first display functional layer group overlaps with the metal layer through an opening on the first planarization layer. After the electrode layer of the second display functional layer group overlaps with the electrode layer of the first display functional layer group through an opening on the second planarization layer, it then overlaps with the metal layer.

[0025] Optionally, the OLED display panel in this application embodiment further includes a touch function layer group and a light filter layer stacked on the display function layer group.

[0026] Secondly, embodiments of this application provide a display device, which includes an OLED display panel as described in the first aspect.

[0027] In summary, the OLED display panel and display device provided in this application embodiment, by configuring a first display functional layer group and a second display functional layer group on the back panel, utilizes the first display functional layer group to form pixels on the display panel, and then utilizes the light emitted by the second display functional layer group to compensate for the optical characteristics of the pixels formed by the first display functional layer group after superimposing with the light emitted by the first display functional layer group, thereby improving the brightness and contrast of the pixels on the display panel, reducing power consumption, realizing full utilization of the space on the back panel, and improving the display quality of the display panel. Attached Figure Description

[0028] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the structure of an OLED display panel based on related technologies;

[0030] Figure 2 This is a schematic diagram of the structure of an OLED display panel provided in some embodiments of this application;

[0031] Figure 3 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0032] Figure 4This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0033] Figure 5 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0034] Figure 6 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0035] Figure 7 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0036] Figure 8 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0037] Figure 9 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0038] Figure 10 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0039] Figure 11 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0040] Figure 12 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0041] Figure 13 This application provides schematic diagrams of the structure of an OLED display panel in some of its embodiments.

[0042] Figure 14 This is a schematic diagram of the structure of an OLED display panel provided in some embodiments of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1-Back panel, 2-Display function layer group, 21-First display function layer group, 211-First electrode layer, 212-First pixel definition layer, 213-First light-emitting layer, 22-Second display function layer group, 221-Second electrode layer, 222-Second pixel definition layer, 223-Second light-emitting layer.

[0045] 01 - Red glowing area, 02 - Green glowing area, 03 - Blue glowing area.

[0046] 3-Metal layer, 4-Pixel encapsulation layer, 5-First planarization layer, 6-Second planarization layer, 71-First electrode plate, 72-Second electrode plate, 73-Electrode layer, 81-Black matrix layer, 82-Red color film pixel layer, 83-Green color film pixel layer, 84-Blue color film pixel layer, 85-Protective layer. Detailed Implementation

[0047] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] It is understandable that in organic light-emitting devices (OLEDs), a pixel definition layer structure is designed on the panel to form an array of pixel-defining regions, namely the pixel opening regions of the pixel definition layer. Then, a light-emitting layer can be formed within the pixel opening regions, ultimately forming the pixel definition layer and functional layer structure of the light-emitting device.

[0050] like Figure 1 As shown, after the light-emitting material is deposited in the opening formed in the pixel definition layer, and then the color filter layer is integrated on the light-emitting layer, the light emitted from any OLED device will pass through the color filter layer to achieve color.

[0051] Understandable, in such cases Figure 1 In the structure shown, the pixel openings formed by the pixel definition layer restrict the position of each light-emitting material. This means that after the display panel is formed, the area corresponding to the pixel definition layer on the back panel does not emit light, which is an unused blank area.

[0052] In actual use, the large number of blank areas corresponding to the pixel definition layer on the back panel will affect the final display brightness and contrast of the display panel.

[0053] To address the aforementioned issues, this application embodiment effectively utilizes the entire space on the back panel. By adding a new display function layer group on top of the existing display function layer group on the back panel, the light emitted by the newly added display function layer group can be superimposed with the light emitted by the original display function layer group when the display panel is displaying normally. This compensates for the optical characteristics of the pixels formed by the original display function layer group on the display panel, ultimately increasing the display brightness and contrast of the image on the display panel and reducing power consumption.

[0054] To better understand the OLED display panel provided in the embodiments of this application, the following will be used... Figures 2 to 14 A detailed explanation is provided.

[0055] Figure 2 This is a schematic diagram of the structure of an OLED panel provided in an embodiment of this application, as shown below. Figure 2 As shown, the display panel specifically includes:

[0056] Back panel 1 and display function layer group 2 disposed on back panel 1;

[0057] The display functional layer group includes a first display functional layer group 21 and a second display functional layer group 22. The first display functional layer group is used to form pixels on the display panel, and the second display functional layer group is used to compensate for the optical characteristics of the pixels.

[0058] Specifically, such as Figure 2 As shown, the OLED display panel provided in this application embodiment can have two sets of display function layer groups, namely the first display function layer group 21 and the second display function layer group 22, on the back panel 1.

[0059] In practice, the first display functional layer group, as the original light-emitting functional layer group of the display panel, emits light that can form pixels on the display panel. The light emitted by the second display functional layer group can be superimposed with the light emitted by the first display functional layer group to optically compensate for the pixels formed by the first display functional layer group on the display panel. That is, it compensates for the blank areas corresponding to the pixel definition layer area in the first display functional layer group to improve display brightness and contrast.

[0060] The structure of the first display functional layer and the second display functional layer may specifically include an electrode layer, a pixel definition layer and a light-emitting layer, wherein the light-emitting layer constitutes an array of distributed light-emitting areas.

[0061] For example, such as Figure 2 As shown, the first display function layer group 21 may include a first electrode layer 211, a first pixel definition layer 212, and a first light-emitting layer 213; the second display function layer group may include a second electrode layer 221, a second pixel definition layer 222, and a second light-emitting layer 223.

[0062] It is understandable that, since the pixel definition layer in the display function layer is a transparent material, regardless of whether the first display function layer is below the second display function layer group or the second display function layer is below the first display function layer group, the light emitted by the light-emitting layer in the lower display function layer can pass through the upper pixel definition layer to achieve the display function or compensation function.

[0063] For example, such as Figure 2As shown, when the second display functional layer is below the first display functional layer group, i.e., the first display functional layer group is positioned away from the back panel, the light-emitting layer therein directly forms pixels on the display panel. At this time, the light emitted by the light-emitting layer in the lower second display functional layer group passes through the pixel definition layer in the first display functional layer group and is superimposed with the light emitted by the first display functional layer group to optically compensate for the blank areas generated by the pixel definition layer in the first display functional layer group.

[0064] For example, such as Figure 3 As shown, when the first display functional layer is located below the second display functional layer group, i.e., close to the back panel, the light-emitting layer therein can transmit light through the pixel definition layer in the second display functional layer group to ultimately form pixels on the display panel. At this time, the light emitted by the light-emitting layer in the upper second display functional layer group is directly superimposed with the light emitted by the first display functional layer group to optically compensate for the blank areas created by the pixel definition layer in the first display functional layer group.

[0065] Furthermore, in some embodiments, in order to effectively eliminate the blank area corresponding to the pixel definition layer area in the first display functional layer group and improve the display brightness of the display panel, the light-emitting area corresponding to the light-emitting layer in the second display functional layer group can partially or completely cover the area corresponding to the pixel definition layer in the first display functional layer.

[0066] For example, such as Figure 2 and Figure 3 As shown, the light-emitting area corresponding to the second display functional layer group can overlap to a certain extent with the orthographic projection of the pixel definition layer of the first display functional layer group on the back panel, so that the light emitted by the second display functional layer group can supplement the blank area caused by the pixel definition layer of the first display functional layer group. That is, the orthographic projection of the light-emitting area in the second display functional layer group on the back panel can at least cover the orthographic projection of the pixel definition layer on the back panel between any two light-emitting areas in the first display functional layer group.

[0067] For example, such as Figure 4 As shown, in some other embodiments, in order to save on process materials and manufacturing costs, the brightness and contrast of a single pixel's light-emitting area can be selectively increased. The light-emitting area of ​​the second display functional layer group is compared with any of the light-emitting areas in the first display functional layer group.

[0068] Furthermore, to better understand the embodiments of this application, in the actual application of the three pixel colors, such as the structure of the display panel when the light-emitting area of ​​the first display functional layer group includes a red area, a green area, and a blue area, the following will explain... Figures 5 to 7 A detailed explanation is provided.

[0069] like Figure 5As shown, in some embodiments, the orthographic projection of the light-emitting area in the second display functional layer group onto the back panel can cover the orthographic projection of the pixel definition layer on the back panel between the red area 01 and the green area 02 of the first display functional layer group, as well as between the green area 02 and the blue area 03, and between the blue area 03 and the red area 01, and the second display functional layer is disposed close to the back panel.

[0070] It is understood that in this embodiment, the light-emitting area in the second display functional layer group can perfectly complement the light-emitting area in the first display functional layer group, so that all the space on the back panel can output light in the direction of the panel, thereby effectively improving the brightness and contrast of the display panel.

[0071] Or, in such Figure 4 In the scenario shown, in order to save on process materials and manufacturing costs, when selectively increasing the brightness and contrast of a single pixel's light-emitting area, the light-emitting area of ​​the second display functional layer group can be any of the first display functional layer group.

[0072] like Figure 6 As shown, the orthographic projection of the light-emitting area in the second display functional layer group onto the back panel can cover the orthographic projection of the pixel definition layer between the green area 02 and the blue area 03 in the first display functional layer group onto the back panel, thereby improving the contrast and brightness of the green pixel area and the blue pixel area in the first display functional layer group.

[0073] or, Figure 7 As shown, the orthographic projection of the light-emitting area in the second display functional layer group onto the back panel can cover the orthographic projection of the pixel definition layer between the red area 01 and the green area 02 in the first display functional layer group onto the back panel, thereby improving the contrast and brightness of the red pixel area and the green pixel area in the first display functional layer group.

[0074] It is understood that the overlapping portion and overlapping position of the light-emitting area of ​​the second display functional layer group and the orthographic projection of the pixel definition layer in the first display functional layer can be flexibly adjusted according to actual needs, and the embodiments of this application do not impose any restrictions on this.

[0075] On the other hand, the color setting of the light-emitting layer in the second display function layer can be configured as one or more of white, red, green, and blue.

[0076] For example, such as Figure 5 In the structure shown, a white light-emitting layer can be configured in the second display function layer group to enhance the brightness of the entire display panel.

[0077] Or, such as Figure 6 and Figure 7In the structure shown, a white light-emitting layer can also be configured in the second display function layer group to enhance the brightness of any two types of pixels.

[0078] For example, in other embodiments, a light-emitting layer that emits a certain monochromatic light can also be configured in the second display functional layer group to enhance the brightness of a specified pixel on the display panel.

[0079] like Figure 8 As shown, a blue light-emitting layer can be configured in the second display function layer group to enhance the brightness of the blue pixels on the display panel.

[0080] like Figure 9 As shown, a green light-emitting layer can be configured in the second display function layer group to enhance the brightness of green pixels on the display panel.

[0081] It is understandable that, in practice, the second display function layer can also be configured with red, green and blue areas respectively, corresponding to the first display function layer group.

[0082] Or, in such Figure 6 and Figure 7 The structure shown also allows the light-emitting layer in the second display functional layer group to be configured to emit red, blue, and green (e.g., ...). Figure 10 and Figure 11 (As shown) Any one, two, or three of them, the embodiments of this application do not limit this.

[0083] It is understood that the OLED display panel in the embodiments of this application, as described in the above embodiments, utilizes the space on the back panel by complementary arrangement of two sets of display functional layers in a horizontal position, thereby effectively improving display brightness and contrast.

[0084] Furthermore, such as Figure 12 and Figure 13 As shown, in actual OLED display panels, to ensure their normal use, a metal layer 3 is provided between the display functional layers of the back panel 1 and 2, so that the first display functional layer group and the electrode layer of the first display functional layer group are respectively connected to the metal layer 3 to realize circuit signal transmission.

[0085] Furthermore, in the actual process, in situations such as Figure 2 In the structure shown, where the second display function layer group is close to the back panel and the first display function layer group is far from the back panel, a first flat layer 5 is provided between the metal layer 3 and the second display function layer group 22, and a second flat layer 6 is provided between the second display function layer group 22 and the first display function layer group 21.

[0086] Or, in such Figure 3In the structure where the second display function layer group is away from the back panel and the first display function layer group is close to the back panel, a first flattening layer 5 is provided between the metal layer 3 and the first display function layer group 21, and a second flattening layer 6 is provided between the first display function layer group 21 and the second display function layer group 22.

[0087] Furthermore, regarding the display panel structure provided in the above embodiments, since a set of display functional layer groups is added to the back panel, the electrode layers in the first and second display functional layer groups overlap with the metal layer on the back panel. Specifically, this can be flexibly configured according to the different vertical configurations of the first and second display functional layer groups. The following describes... Figures 12 to 13 A detailed explanation is provided.

[0088] For example, such as Figure 12 and Figure 13 As shown, when the first display function layer group is positioned away from the back panel and the second display function layer group is positioned close to the back panel:

[0089] In some embodiments, the second electrode layer 221 of the second display functional layer group 22 overlaps with the metal layer 3 through an opening on the first planarization layer 5, and the first electrode layer 211 of the first display functional layer group 21 overlaps with the metal layer 3 through the second planarization layer 6 and the opening on the first planarization layer 5, such as... Figure 12 As shown.

[0090] Alternatively, in other embodiments, in order to avoid the process difficulty and overlapping effect caused by the above-mentioned overlapping method through deep hole process, the first electrode layer 211 in the first display functional layer can be overlapped with the metal layer on the back plate by means of the second electrode layer 221 in the second display functional layer group.

[0091] That is, Figure 13 As shown, the second electrode layer 221 of the second display functional layer group 22 overlaps with the metal layer 3 through the opening on the first planarization layer 5. The first electrode layer 211 of the first display functional layer group 21 first overlaps with the second electrode layer 221 of the second display functional layer group 22 through the opening on the second planarization layer 5, and then overlaps with the metal layer 3.

[0092] In addition, such as Figure 3 As shown, when the first display function layer group is positioned close to the back panel and the second display function layer group is positioned far from the back panel, the overlap between the electrode layer and the metal layer in the display function layer group is as follows:

[0093] For example, in some embodiments, the first electrode layer 211 of the first display functional layer group 21 overlaps with the metal layer 3 through an opening on the first planarization layer 5, and the second electrode layer 221 of the second display functional layer group 22 overlaps with the metal layer 3 through an opening on the second planarization layer 6 and the first planarization layer 5.

[0094] For example, in other embodiments, the first electrode layer 211 of the first display functional layer group 21 can also overlap with the metal layer 3 through the opening on the first planarization layer 5, and the second electrode layer 221 of the second display functional layer group 22 can first overlap with the first electrode layer 211 of the first display functional layer group 21 through the opening on the second planarization layer 6, and then overlap with the metal layer 3, so as to simplify the process.

[0095] It is understood that the vertical arrangement of the first display functional layer group and the second display functional layer group, as well as the overlapping method of the electrode layer and the metal layer therein, can be flexibly set according to the actual situation, and the embodiments of this application do not limit this.

[0096] Furthermore, the OLED display panel in the embodiments of this application, such as Figure 14 As shown, in some embodiments, a touch function layer group and a filter layer can also be configured on the display function layer group 2, so that after the OLED display panel integrates the filter layer, any light emitted from the OLED device will eventually pass through the filter layer to achieve color display.

[0097] In some embodiments, the control function layer group may specifically include a first electrode plate 71, a second electrode plate 72, and an electrode layer 73 located between the first electrode plate 71 and the second electrode plate 72. The specific structure can be configured according to actual conditions, and the embodiments of this application do not limit it.

[0098] In some embodiments, the filter layer is used to filter external light to prevent external light from affecting the light emitted by the first display functional layer group. Specifically, it may include a black matrix layer 81, a color filter layer (red color filter pixel layer 82, green color filter pixel layer 83, blue color filter pixel layer 84) and a protective layer 85 stacked from bottom to top.

[0099] It is understood that the display panel in the embodiments of this application, in actual use, such as Figure 14 As shown, the light emitted from the light-emitting layer in the second display functional layer group added below the filter layer can pass through the transparent pixel definition layer in the first display functional layer group and then illuminate the filter layer. The light emitted from the light-emitting layer in the first display functional layer group is superimposed on the light emitted from the light-emitting layer, which ultimately increases the display brightness and contrast and reduces power consumption.

[0100] On the other hand, in order to better understand the OLED display panel provided in the embodiments of this application, the fabrication process of the panel shown in the figure is described in detail below:

[0101] Step 1: Prepare metal layer 3, namely SD layer, on the backplane layer structure through processes such as exposure etching.

[0102] Step 2: Through processes such as exposure and development, a first planarization layer 5 with openings is made on the metal layer 3.

[0103] Step 3: By using an exposure etching process, an electrode layer, namely the second electrode layer 221, is prepared on the first planarization layer. For example, a metal layer serving as the anode is prepared on the first planarization layer. This metal layer overlaps with the metal layer 3 through an opening on the first planarization layer.

[0104] Step 4: Through exposure and development process, a second pixel definition layer 222 is formed on the second electrode layer 221, so that an array of pixel opening regions are arranged on the patterned pixel definition layer.

[0105] Step 5: Deposit the second light-emitting layer 223 in the opening area of ​​the pixel definition layer using a vapor deposition process.

[0106] In practice, white light-emitting vapor deposition materials can be used to improve the overall brightness of the display, or red, green, and blue light-emitting monochrome vapor deposition materials can be used to improve the brightness of the corresponding monochrome.

[0107] Step 6: Prepare a second planarization layer 6 on the second light-emitting layer.

[0108] Step 7: By using an exposure etching process, the first electrode layer 211 in the first display functional layer assembly is prepared on the second planarization layer, that is, the metal layer that serves as the anode of the first display functional layer.

[0109] Furthermore, the metal layer eventually overlaps with the metal layer 3 through the openings on the second planarization layer and the first planarization layer.

[0110] Step 8: By using an exposure and development process, a first pixel definition layer 212 is fabricated on the first electrode layer, so that the patterned first pixel definition layer has an array of pixel opening regions.

[0111] Step 9: Deposit the first light-emitting layer 213, such as red light-emitting layer, green light-emitting layer and blue light-emitting layer, in the opening area of ​​the first pixel definition layer by vapor deposition process.

[0112] Step 10: Fabricate a pixel encapsulation layer 4 on the first display functional layer group. This pixel encapsulation layer generally includes an inorganic layer and an organic layer. The inorganic layer may include silicon nitride (SIN) and / or tin oxide (SnO), etc.; the organic layer may be formed using inkjet printing (IJP) technology.

[0113] Step 11: Prepare the filter layer 8.

[0114] Specifically, firstly, a black matrix layer 71 (BM) is prepared on the pixel encapsulation layer; then, color filter pixel layers 72 (red), 73 (green), and 74 (blue) are prepared in the grooves of the black matrix layer through a coating, exposure, and development process; finally, a transparent organic protective layer 75 is prepared on the color filter layer through a coating, exposure, and development process.

[0115] This completes the fabrication of the OLED display panel.

[0116] It is understood that the above process is merely a simple illustrative example, and other processes involved in practice should not be considered as a limitation on the scope of protection of this application.

[0117] It can also be understood that, in actual use, the light emitted from the light-emitting layer in the second display functional layer group near the back panel can be irradiated to the color filter layer through the transparent pixel definition layer, and superimposed with the light emitted from the light-emitting layer in the first display functional layer group to increase display brightness and contrast and reduce power consumption.

[0118] On the other hand, embodiments of this application also provide a display device, which includes an OLED display panel as described in the above embodiments.

[0119] In summary, the OLED display panel and display device provided in this application, by configuring a first display functional layer group and a second display functional layer group on the back panel, utilize the first display functional layer group to form pixels on the display panel, and then utilize the light emitted by the second display functional layer group to compensate for the optical characteristics of the pixels formed by the first display functional layer group after superimposing the light emitted by the first display functional layer group, thereby improving the brightness and contrast of the pixels on the display panel, reducing power consumption, realizing full utilization of the space on the back panel, and improving the display quality of the display panel.

[0120] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An OLED display panel, characterized in that, The OLED display panel includes: Back panel and display function layer group disposed on the back panel; The display functional layer group includes a first display functional layer group and a second display functional layer group. The first display functional layer group is used to form pixels on the display panel, and the second display functional layer group is used to compensate for the optical characteristics of the pixels. The first display functional layer group is disposed below the second display functional layer group, or the second display functional layer group is disposed below the first display functional layer group. The first display functional layer group and the second display functional layer group respectively include an electrode layer, a pixel definition layer and a light-emitting layer. The light-emitting layer constitutes an array of light-emitting areas. The orthographic projection of the light-emitting area in the second display functional layer group onto the back panel at least covers the orthographic projection of the pixel definition layer between any two light-emitting areas in the first display functional layer group onto the back panel. The light-emitting area of ​​the first display functional layer group includes a red area, a green area, and a blue area, and the light-emitting area of ​​the second display functional layer group includes a white area; The OLED display panel further includes a filter layer stacked on the display functional layer group. The filter layer includes a black matrix layer, a color filter layer, and a protective layer stacked from bottom to top. The color filter layer includes a red color filter pixel layer, a green color filter pixel layer, and a blue color filter pixel layer.

2. The OLED display panel according to claim 1, characterized in that, The orthographic projection of the light-emitting area in the second display functional layer group onto the back panel covers the orthographic projection of the pixel definition layer between the red and green areas, between the green and blue areas, and between the blue and red areas of the first display functional layer group onto the back panel.

3. The OLED display panel according to claim 1, characterized in that, The orthographic projection of the light-emitting area in the second display functional layer group onto the back panel covers the orthographic projection of the pixel definition layer between the green and blue areas in the first display functional layer group onto the back panel.

4. The OLED display panel according to any one of claims 1-3, characterized in that, A metal layer is disposed between the back panel and the display functional layer group, and the first display functional layer group and the electrode layer of the first display functional layer group are respectively connected to the metal layer.

5. The OLED display panel according to claim 4, characterized in that, The first display function layer group is disposed away from the function layer group, and the second display function layer group is disposed close to the back panel.

6. The OLED display panel according to claim 5, characterized in that, A first planarization layer is disposed between the metal layer and the second display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group. The electrode layer of the second display functional layer group overlaps with the metal layer through an opening on the first planarization layer, and the middle electrode layer of the first display functional layer group overlaps with the metal layer through the second planarization layer and the opening on the first planarization layer.

7. The OLED display panel according to claim 5, characterized in that, A first planarization layer is disposed between the metal layer and the second display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group. The electrode layer of the second display functional layer group overlaps with the metal layer through an opening on the first planarization layer. After the electrode layer of the first display functional layer group overlaps with the electrode layer of the second display functional layer group through an opening on the second planarization layer, it then overlaps with the metal layer.

8. The OLED display panel according to claim 4, characterized in that, The first display function layer group is disposed close to the function layer group, and the second display function layer group is disposed away from the back panel.

9. The OLED display panel according to claim 5, characterized in that, A first planarization layer is disposed between the metal layer and the first display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group. The electrode layer of the first display functional layer group overlaps with the metal layer through an opening on the first planarization layer, and the middle electrode layer of the second display functional layer group overlaps with the metal layer through an opening on the second planarization layer and the first planarization layer.

10. The OLED display panel according to claim 5, characterized in that, A first planarization layer is disposed between the metal layer and the first display functional layer group, and a second planarization layer is disposed between the second display functional layer group and the first display functional layer group. The electrode layer of the first display functional layer group overlaps with the metal layer through an opening on the first planarization layer. The electrode layer of the second display functional layer group overlaps with the electrode layer of the first display functional layer group through an opening on the second planarization layer, and then overlaps with the metal layer.

11. The OLED display panel according to any one of claims 1-3 and 5-10, characterized in that, The display panel also includes a touch function layer group stacked on the display function layer group.

12. A display device, characterized in that, The display device includes an OLED display panel as described in any one of claims 1-11.

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