CN114709239B - OLED display panel and display device - Google Patents
OLED display panel and display deviceInfo
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- CN114709239B CN114709239B CN202210279427.4A CN202210279427A CN114709239B CN 114709239 B CN114709239 B CN 114709239B CN 202210279427 A CN202210279427 A CN 202210279427A CN 114709239 B CN114709239 B CN 114709239B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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Abstract
本申请公开了一种OLED显示面板及显示装置，该OLED显示面板包括：背板及设置在该背板上的显示功能层组；该显示功能层组包括第一显示功能层组及第二显示功能层组，该第一显示功能层组用于在显示面板上形成像素点，该第二显示功能层用于补偿该像素点的光学特征。本申请实施例通过在背板上配置两组显示功能层组，以利用第一显示功能层组在显示面板上形成像素点，进而利用第二显示功能层组所发出的光线，在与第一显示功能层组发出的光线叠加后，对第一显示功能层组形成的像素点的光学特征进行补偿，以提升显示面板上像素点的亮度及对比度，降低功耗，实现了背板上空间的充分利用，提升了显示面板的显示品质。
This application discloses an OLED display panel and a display device. The OLED display panel includes a back panel and a display functional 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. This application embodiment, by configuring two sets of display functional layer groups on the back panel, utilizes the first display functional layer group to form pixels on the display panel. Then, the light emitted from the second display functional layer group, after being superimposed with the light emitted from the first display functional layer group, compensates for the optical characteristics of the pixels formed by the first display functional layer group, thereby improving the brightness and contrast of the pixels on the display panel, reducing power consumption, fully utilizing the space on the back panel, and improving the display quality of the display panel.
Description
Technical Field
The present invention relates generally to the field of display technologies, and in particular, to an OLED display panel and a display device.
Background
With the development and progress of display technology, organic electroluminescent devices (OLEDs) have advantages of no backlight source, high contrast ratio, self-luminescence, fast response, wide viewing angle, high brightness, bright color, thinness, availability for flexible panels, wide use temperature range, simpler structure and process, etc. compared to LCDs, are considered as the next generation display technology.
Disclosure of Invention
In view of the foregoing drawbacks or shortcomings of the prior art, it is desirable to provide an OLED display panel and a display device, in which two display function groups are disposed on a back plate, so that a first display function group of the two display function groups forms pixels on the display panel, and a second display function group of the two display function groups can compensate optical characteristics of the pixels, so as to improve brightness and contrast of the display panel.
In a first aspect, an embodiment of the present application provides an OLED display panel, including:
a backboard and a display function layer group arranged on the backboard;
the display function layer group comprises a first display function layer group and a second display function layer group, wherein the first display function layer group is used for forming pixel points on the display panel, and the second display function layer group is used for compensating optical characteristics of the pixel points.
Optionally, in the OLED display panel of the embodiment of the present application, the first display function layer group and the second display function layer group respectively include an electrode layer, a pixel defining layer and a light emitting layer, the light emitting layer forms a light emitting area distributed in an array,
The front projection of the light emitting area in the second display function layer group on the backboard at least covers the front projection of the pixel definition layer between any two light emitting areas in the first display function layer group on the backboard.
Optionally, in the OLED display panel of the embodiment of the present application, the light emitting area of the first display function layer group includes a red area, a green area and a blue area,
And the orthographic projection of the luminous region in the second display function layer group on the backboard covers the orthographic projection of the pixel definition layer between the red region and the green region, between the green region and the blue region and between the blue region and the red region of the first display function layer group.
Optionally, in the OLED display panel of the embodiment of the present application, the light emitting area of the first display function layer group includes a red area, a green area and a blue area,
And the orthographic projection of the luminous region in the second display function layer group on the backboard covers the orthographic projection of the pixel definition layer between the green region and the blue region in the first display function layer group on the backboard.
Optionally, in the OLED display panel of the embodiment of the present application, the light emitting area of the second display function layer group includes one or more of white, red, green and blue.
Optionally, in the OLED display panel according to the embodiment of the present application, a metal layer is disposed between the back plate and the display function layer group, and the first display function layer group and the electrode layer of the first display function layer group are respectively overlapped with the metal layer.
Optionally, in the OLED display panel according to the embodiment of the present application, 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 plate.
Optionally, in the OLED display panel of the embodiment of the present application, a first flat layer is disposed between the metal layer and the second display function layer group, a second flat layer is disposed between the second display function layer group and the first display function layer group,
The electrode layer of the second display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the middle electrode layer of the first display function layer group is overlapped with the metal layer through the opening on the second flat layer and the first flat layer.
Optionally, in the OLED display panel of the embodiment of the present application, a first flat layer is disposed between the metal layer and the second display function layer group, a second flat layer is disposed between the second display function layer group and the first display function layer group,
The electrode layer of the second display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the electrode layer of the first display function layer group is overlapped with the electrode layer of the second display function layer group through the opening of the second flat layer and then is overlapped with the metal layer.
Optionally, in the OLED display panel according to the embodiment of the present application, 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 plate.
Optionally, in the OLED display panel of the embodiment of the present application, a first flat layer is disposed between the metal layer and the first display function layer group, a second flat layer is disposed between the second display function layer group and the first display function layer group,
The electrode layer of the first display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the middle electrode layer of the second display function layer group is overlapped with the metal layer through the second flat layer and the opening on the first flat layer.
Optionally, in the OLED display panel of the embodiment of the present application, a first flat layer is disposed between the metal layer and the first display function layer group, a second flat layer is disposed between the second display function layer group and the first display function layer group,
The electrode layer of the first display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the electrode layer of the second display function layer group is overlapped with the metal layer after being overlapped with the electrode layer of the first display function layer group through the opening of the second flat layer.
Optionally, in the OLED display panel according to the embodiment of the present application, the display panel further includes a touch functional layer group and a filter layer stacked on the display functional layer group.
In a second aspect, an embodiment of the present application provides a display device, which includes an OLED display panel according to the first aspect.
In summary, according to the OLED display panel and the display device provided by the embodiments of the present application, the first display function layer group and the second display function layer group are configured on the back panel, so that the first display function layer group is utilized to form the pixel point on the display panel, and then the light emitted by the second display function layer group is utilized, after the light emitted by the first display function layer group is overlapped, the optical characteristics of the pixel point formed by the first display function layer group are compensated, so as to improve the brightness and contrast of the pixel point on the display panel, reduce the power consumption, realize the full utilization of the space on the back panel, and improve the display quality of the display panel.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a related art OLED display panel;
FIG. 2 is a schematic diagram of an OLED display panel according to some embodiments of the present application;
FIG. 3 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 4 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 5 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 6 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 7 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 8 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 9 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 10 is a schematic diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 11 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 12 is a schematic diagram of an OLED display panel according to still other embodiments of the present application;
FIG. 13 is a schematic diagram of an OLED display panel according to still other embodiments of the present application;
fig. 14 is a schematic structural diagram of an OLED display panel according to still other embodiments of the present application.
Reference numerals illustrate:
1-backplate, 2-group of display function layers, 21-group of first display function layers, 211-first electrode layer, 212-first pixel definition layer, 213-first light emitting layer, 22-group of second display function layers, 221-second electrode layer, 222-second pixel definition layer, 223-second light emitting layer.
01-Red light emitting region, 02-green light emitting region, 03-blue light emitting region.
3-Metal layer, 4-pixel encapsulation layer, 5-first flat layer, 6-second flat 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, and 85-protective layer.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It can be understood that in an organic electroluminescent device (OLED), a pixel defining layer structure is designed on a panel to form pixel defining areas distributed in an array, i.e. pixel opening areas of the pixel defining layer, so that a light emitting layer can be formed in the pixel opening areas, and finally, the pixel defining layer and the functional layer structure of the light emitting device are formed.
As shown in fig. 1, after the light-emitting material is evaporated in the opening formed by the pixel defining layer, and then the color film layer is integrated on the light-emitting layer, any light emitted in the OLED device can pass through the color film layer to realize color.
It can be appreciated that in the structure shown in fig. 1, the positions of the respective light emitting materials are restricted due to the pixel openings formed using the pixel defining layer. After the display panel is formed, the area corresponding to the pixel definition layer on the back plate does not emit light, namely an unused blank area.
In the practical use process, the structure influences the final display brightness and contrast of the display panel due to a large number of blank areas corresponding to the pixel definition layers on the back plate.
In order to solve the above problems, the embodiment of the application effectively uses the whole space area on the back plate, and sets a group of display function layer groups on the basis of the original display function layer groups on the back plate, so that when the display panel displays normally, the light emitted by the added display function layer groups can be overlapped with the light emitted by the display function layer groups under the original structure, and further the optical characteristics of pixel points formed on the display panel by the original display function layer groups are compensated, thereby finally increasing the display brightness and contrast of the picture on the display panel and reducing the power consumption.
In order to better understand the OLED display panel provided by the embodiments of the present application, the following details are set forth in fig. 2 to 14.
Fig. 2 is a schematic structural diagram of an OLED panel according to an embodiment of the present application, as shown in fig. 2, where the display panel specifically includes:
the backboard 1 and the display function layer group 2 arranged on the backboard 1;
The display function layer group comprises a first display function layer group 21 and a second display function layer group 22, wherein the first display function layer group is used for forming pixel points on the display panel, and the second display function layer group is used for compensating optical characteristics of the pixel points.
Specifically, as shown in fig. 2, in the OLED display panel provided in the embodiment of the present application, two display function layer groups, that is, a first display function layer group 21 and a second display function layer group 22, may be disposed on the back plate 1.
In practice, the first display function layer group is used as an original light emitting function layer group of the display panel, and light emitted by the first display function layer group can present pixel points on the display panel. And after the light rays emitted by the second display function layer group can be overlapped with the light rays emitted by the first display function layer group, optical compensation is performed on the pixel points formed by the first display function layer group on the display panel, namely, the blank areas corresponding to the pixel definition layer areas in the first display function layer group are compensated, so that display brightness and contrast are improved.
The structures of the first display function layer and the second display function layer specifically may include an electrode layer, a pixel definition layer and a light emitting layer, where the light emitting layer forms a light emitting region distributed in an array.
For example, as shown in fig. 2, the first display function layer group 21 may include a first electrode layer 211, a first pixel defining layer 212, and a first light emitting layer 213, and the second display function layer group may include a second electrode layer 221, a second pixel defining layer 222, and a second light emitting layer 223.
It can be understood that, since the pixel defining layer in the display function layer is made of transparent material, no matter 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 display function layer below can pass through the pixel defining layer above to realize the display function or the compensation function.
For example, as shown in fig. 2, when the second display function layer is below the first display function layer group, i.e. the first display function layer group is disposed away from the back plate, the light-emitting layer directly forms a pixel point on the display panel. At this time, the light emitted from the light emitting layer in the second display function layer group below passes through the pixel defining layer in the first display function layer group and is overlapped with the light emitted from the first display function layer group, so as to optically compensate the blank area generated by the pixel defining layer in the first display function layer group.
For another example, as shown in fig. 3, when the first display function layer is below the second display function layer group, that is, the first display function layer group is disposed close to the back plate, the light-emitting layer in the first display function layer group can pass through the pixel definition layer in the second display function layer group, and finally, a pixel point is formed on the display panel. At this time, the light emitted by the light emitting layer in the second display function layer group located above is directly overlapped with the light emitted by the first display function layer group, so as to optically compensate the blank area generated by the pixel definition layer in the first display function layer group.
Further, in some embodiments, in order to effectively eliminate a blank area corresponding to a pixel definition layer area in a first display function layer group, display brightness of a display panel is improved, so that a light emitting area corresponding to a light emitting layer in a second display function layer group may partially or completely cover an area corresponding to a pixel definition layer in the first display function layer.
For example, as shown in fig. 2 and fig. 3, the light emitting area corresponding to the second display function layer group may be overlapped with the front projection of the pixel defining layer of the first display function layer group on the back plate to make the light emitted by the second display function layer group supplement the blank area caused by the pixel defining layer of the first display function layer group, that is, the front projection of the light emitting area in the second display function layer group on the back plate may cover at least the front projection of the pixel defining layer between any two light emitting areas in the first display function layer group on the back plate.
For example, as shown in fig. 4, in other embodiments, the brightness and contrast of the light emitting area of a single pixel can be selectively improved to save the cost in terms of process materials and manufacturing. And the luminous area of the second display function layer group is arbitrarily matched with any one of the first display function layer groups.
Further, in order to better understand the embodiment of the present application, the structure of the display panel in the case of practical three pixel colors, such as the light emitting region of the first display function group includes a red region, a green region and a blue region, is described in detail below with reference to fig. 5 to 7.
As shown in fig. 5, in some embodiments, the orthographic projection of the light emitting region in the second display function layer group on the back plate may cover the orthographic projection of the pixel defining layer between the red region 01 and the green region 02, and between the green region 02 and the blue region 03, and between the blue region 03 and the red region 01 of the first display function layer group on the back plate, and the second display function layer is disposed near the back plate.
It can be appreciated that in this embodiment, the light emitting area in the second display function layer group and the light emitting area in the first display function layer group may be perfectly complementary, so that all the spaces on the back plate can output light in the direction of the panel, so as to effectively improve the brightness and contrast ratio on the display panel.
Or in the scene shown in fig. 4, in order to save the cost in terms of process materials and preparation, when selectively improving the brightness and contrast of the light-emitting area of a single pixel, the light-emitting area of the second display function layer group and any one of the first display function layer groups can be combined.
As shown in fig. 6, the front projection of the light emitting region in the second display function layer group on the back plate can cover the front projection of the pixel defining layer between the green region 02 and the blue region 03 in the first display function layer group on the back plate, so as to improve the contrast ratio and brightness of the green pixel region and the blue pixel region in the first display function layer group.
Or as shown in fig. 7, the orthographic projection of the light-emitting region in the second display function layer group on the back plate can cover the orthographic projection of the pixel definition layer between the red region 01 and the green region 02 in the first display function layer group on the back plate, so as to improve the contrast ratio and brightness of the red pixel region and the green pixel region in the first display function layer group.
It can be understood that, for the overlapping portion and the overlapping position of the light emitting region of the second display function layer group and the orthographic projection of the pixel definition layer in the first display function layer, the embodiment of the application is not limited thereto, and can be flexibly adjusted according to actual requirements.
On the other hand, for the color setting of the light emitting layer in the second display function layer, one or more of white, red, green, and blue may be configured.
For example, in the structure shown in fig. 5, a light emitting layer that emits white light may be disposed in the second display function layer group to enhance the brightness of the entire display panel.
Or in the structure shown in fig. 6 and fig. 7, a white light emitting layer may be disposed in the second display function layer group to enhance the brightness of any two pixels.
For example, in other embodiments, a light emitting layer that emits a single color may be further disposed in the second display function layer group to enhance the brightness of the designated pixel of the display panel.
As shown in fig. 8, a light emitting layer that emits blue light may be disposed in the second display function layer group to enhance the brightness of blue pixels on the display panel.
As shown in fig. 9, a light emitting layer emitting green light may be disposed in the second display function layer group to enhance the brightness of the green pixel on the display panel.
It will be appreciated that in practice, the second display function layer may be configured as red, green and blue regions, respectively, corresponding to the first display function layer group.
Alternatively, in the structures shown in fig. 6 and fig. 7, the light emitting layer in the second display function layer group may be configured to emit any one or two or three of red, blue and green (as shown in fig. 10 and fig. 11), which is not limited in this embodiment of the present application.
It can be understood that, by describing the above embodiments, that is, by the complementary arrangement of the two groups of display function groups in the horizontal position, the OLED display panel in the embodiment of the present application fully utilizes the space on the back plate, so as to effectively improve the display brightness and contrast.
Further, as shown in fig. 12 and 13, in order to ensure normal use of the actual OLED display panel, a metal layer 3 is disposed between the back plate 1 and the 2 display function layer groups, so that the first display function layer group and the electrode layer of the first display function layer group are respectively overlapped with the metal layer 3, so as to realize circuit signal transmission.
In addition, in the actual process, in the structure that the second display function layer group is close to the back plate and the first display function layer group is far away from the back plate as shown in fig. 2, a first flat layer 5 is disposed between the metal layer 3 and the second display function layer group 22, and a second flat layer 6 is disposed between the second display function layer group 22 and the first display function layer group 21.
Or in the structure that the second display function layer group is far away from the back plate and the first display function layer group is close to the back plate as shown in fig. 3, a first flat layer 5 is arranged between the metal layer 3 and the first display function layer group 21, and a second flat layer 6 is arranged between the first display function layer group 21 and the second display function layer group 22.
Further, with the structure of the display panel provided in the above embodiments, since a group of display function layer groups is added on the back plate, the electrode layers in the first display function layer group and the second display function layer group are overlapped with the metal layer on the back plate. The flexible arrangement can be specifically performed according to different configurations of the first display function group and the second display function group in the vertical direction, and is described in detail below through fig. 12 to 13.
For example, as shown in fig. 12 and 13, when the first display function group is disposed away from the back plate and the second display function group is disposed close to the back plate:
In some embodiments, the second electrode layer 221 of the second display function layer set 22 overlaps the metal layer 3 through the openings on the first flat layer 5, and the first electrode layer 211 of the first display function layer set 21 overlaps the metal layer 3 through the openings on the second flat layer 6 and the first flat layer 5, as shown in fig. 12.
Or in other embodiments, in order to avoid the above-mentioned process difficulty caused by the overlapping manner of the deep hole process, and the overlapping effect, the first electrode layer 211 in the first display function layer may be made to pass through the second electrode layer 221 in the second display function layer group, so as to achieve overlapping with the metal layer on the back plate.
That is, as shown in fig. 13, the second electrode layer 221 of the second display function layer group 22 is overlapped with the metal layer 3 through the opening on the first flat layer 5, and the first electrode layer 211 of the first display function layer group 21 is overlapped with the second electrode layer 221 of the second display function layer group 22 through the opening of the second flat layer 5 before being overlapped with the metal layer 3.
In addition, as shown in fig. 3, when the first display function layer group is disposed close to the back plate and the second display function layer group is disposed far away from the back plate, the overlap joint between the electrode layer and the metal layer in the display function layer group is specifically as follows:
For example, in some embodiments, the openings of the first electrode layer 211 of the first display function layer group 21 passing through the first flat layer 5 overlap the metal layer 3, and the second electrode layer 221 of the second display function layer group 22 overlaps the metal layer 3 passing through the second flat layer 6 and the openings of the first flat layer 5.
For example, in other embodiments, the first electrode layer 211 of the first display function layer group 21 may also overlap the metal layer 3 through the opening on the first flat layer 5, and the second electrode layer 221 of the second display function layer group 22 may overlap the first electrode layer 211 of the first display function layer group 21 through the opening of the second flat layer 6 before overlapping the metal layer 3, so as to simplify the process difficulty.
It can be understood that, the arrangement mode of the first display function layer group and the second display function layer group in the vertical direction and the lap joint mode of the electrode layer and the metal layer therein can be flexibly set according to actual conditions, which is not limited in the embodiment of the application.
Further, as shown in fig. 14, in some embodiments, the touch functional layer group and the filter layer may be further configured on the display functional layer group 2, so that after the filter layer is integrated, the OLED display panel can finally realize color display through the filter layer by using light emitted from any OLED device.
In some embodiments, the control function layer assembly may specifically include a first electrode plate 71, a second electrode plate 72, and an electrode layer 73 between the first electrode plate 71 and the second electrode plate 72. The specific structure may be configured according to practical situations, and the embodiment of the present application is not limited thereto.
In some embodiments, the filter layer is used for filtering external light to avoid the influence of the external light on the light emitted by the first display function layer group, and may specifically include a black matrix layer 81, a color film layer (red color film pixel layer 82, green color film pixel layer 83, blue color film pixel layer 84) and a protective layer 85, which are stacked from bottom to top.
It can be understood that, in practical use, as shown in fig. 14, the light emitted by the light emitting layer in the second display function layer group added under the filter layer may pass through the transparent pixel defining layer in the first display function layer group, further irradiate the filter layer, and overlap with the light emitted by the light emitting layer evaporated in the first display function layer group, so as to finally increase display brightness and contrast, and reduce power consumption.
On the other hand, in order to better understand the OLED display panel provided by the embodiments of the present application, the following details are set forth in the preparation process of the panel as shown in the drawings:
The first step is to prepare a metal layer 3, namely an SD layer, on the backboard layer structure through exposure etching and other processes.
In the second step, the first flat layer 5 with openings is made on the metal layer 3 by exposure and development.
And thirdly, preparing an electrode layer in the second display function layer group, namely a second electrode layer 221, such as a metal layer serving as an anode, on the first flat layer through an exposure etching process, wherein the metal layer is overlapped with the metal layer 3 through an opening in the first flat layer.
A fourth step of forming a second pixel defining layer 222 on the second electrode layer 221 by an exposure developing process such that pixel opening regions of array distribution are disposed on the patterned pixel defining layer.
Fifth, the second light emitting layer 223 is vapor-deposited in the opening region of the pixel defining layer by a vapor deposition process.
In practice, a white-light-emitting vapor deposition material may be used to achieve an overall increase in brightness of the display, or a red, green, and blue-emitting single-color vapor deposition material may be used to achieve an increase in brightness of the corresponding single color.
A sixth step of preparing a second flat layer 6 on the second light emitting layer.
A seventh step of preparing a first electrode layer 211 in the first display function layer assembly, i.e., a metal layer as an anode of the first display function layer, on the second flat layer through an exposure etching process.
The metal layer passes through the openings in the second flat layer and the first flat layer and finally overlaps the metal layer 3.
Eighth, the first pixel defining layer 212 is formed on the first electrode layer through an exposure and development process, such that the patterned first pixel defining layer has pixel opening regions distributed in an array.
And a ninth step of vapor-depositing a first light-emitting layer 213, such as a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer, in the opening region of the first pixel defining layer by a vapor deposition process.
A tenth step of preparing a pixel encapsulation layer 4, which may generally comprise an inorganic layer and an organic layer, on the first group of display function layers. The inorganic layer may include silicon nitride (SIN) and/or tin oxide (SnO) and the like, and the organic layer may be formed using an inkjet printing (IJP) technique.
Eleventh step, preparing the filter layer 8.
Specifically, a black matrix layer 71 (BM) is first prepared on the pixel encapsulation layer, color film pixel layers 72 (red), 73 (green) and 74 (blue) are then prepared in the black matrix layer groove by a coating exposure and development process, and finally a transparent organic protection layer 75 is prepared on the color film layer by a coating exposure and development process.
Thus, the preparation of the OLED display panel is completed.
It will be appreciated that the above described process is merely a simple illustrative example and should not be considered as limiting the scope of the application with respect to other processes involved in practice.
It can be further understood that, in practical use, the light emitted by the light emitting layer in the second display function layer group close to the back plate can irradiate the color film layer through the transparent pixel definition layer, and the light emitted by the light emitting layer in the first display function layer group is overlapped with the light emitted by the light emitting layer in the first display function layer group, so that display brightness and contrast are increased, and power consumption is reduced.
On the other hand, the embodiment of the application also provides a display device, which comprises the OLED display panel in the embodiment.
In summary, according to the OLED display panel and the display device provided by the embodiments of the present application, the first display function layer group and the second display function layer group are configured on the back panel, so that the first display function layer group is utilized to form the pixel point on the display panel, and then the light emitted by the second display function layer group is utilized, after the light emitted by the first display function layer group is overlapped, the optical characteristics of the pixel point formed by the first display function layer group are compensated, so as to improve the brightness and contrast of the pixel point on the display panel, reduce the power consumption, realize the full utilization of the space on the back panel, and improve the display quality of the display panel.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the spirit of the application. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (12)
1. An OLED display panel, wherein the OLED display panel includes:
The backboard and the display function layer group are arranged on the backboard;
The display function layer group comprises a first display function layer group and a second display function layer group, wherein the first display function layer group is used for forming pixel points on a display panel, and the second display function layer is used for compensating optical characteristics of the pixel points;
the first display function layer group and the second display function layer group respectively comprise an electrode layer, a pixel definition layer and a light-emitting layer, wherein the light-emitting layers form light-emitting areas distributed in an array, and orthographic projection of the light-emitting areas in the second display function layer group on the back plate at least covers orthographic projection of the pixel definition layer between any two light-emitting areas in the first display function layer group on the back plate;
The light-emitting area of the first display function layer group comprises a red area, a green area and a blue area, and the light-emitting area of the second display function layer group comprises white;
The OLED display panel further comprises a filter layer which is arranged on the display function layer group in a laminated mode, wherein the filter layer comprises a black matrix layer, a color film layer and a protective layer which are arranged from bottom to top in a laminated mode, and the color film layer comprises a red color film pixel layer, a green color film pixel layer and a blue color film pixel layer.
2. The OLED display panel of claim 1, wherein,
And the orthographic projection of the luminous area in the second display function layer group on the backboard covers the orthographic projection of the pixel definition layer between the red area and the green area, between the green area and the blue area and between the blue area and the red area of the first display function layer group on the backboard.
3. The OLED display panel of claim 1, wherein,
And the orthographic projection of the luminous area in the second display function layer group on the backboard covers the orthographic projection of the pixel definition layer between the green area and the blue area in the first display function layer group on the backboard.
4. An OLED display panel as claimed in any one of claims 1 to 3 wherein a metal layer is provided between the back plate and the display function layer group, and the first display function layer group and the electrode layer of the first display function layer group overlap the metal layer, respectively.
5. The OLED display panel of claim 4, wherein the first group of display function layers is disposed away from the group of function layers and the second group of display function layers is disposed proximate to the back plane.
6. The OLED display panel of claim 5, wherein a first flat layer is disposed between the metal layer and the second group of display function layers, a second flat layer is disposed between the second group of display function layers and the first group of display function layers,
The electrode layer of the second display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the middle electrode layer of the first display function layer group is overlapped with the metal layer through the second flat layer and the opening on the first flat layer.
7. The OLED display panel of claim 5, wherein a first flat layer is disposed between the metal layer and the second group of display function layers, a second flat layer is disposed between the second group of display function layers and the first group of display function layers,
The electrode layer of the second display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the electrode layer of the first display function layer group is overlapped with the electrode layer of the second display function layer group through the opening of the second flat layer and then is overlapped with the metal layer.
8. The OLED display panel of claim 4, wherein the first group of display function layers is disposed proximate to the group of function layers and the second group of display function layers is disposed distal to the back plane.
9. The OLED display panel of claim 5, wherein a first flat layer is disposed between the metal layer and the first group of display function layers, a second flat layer is disposed between the second group of display function layers and the first group of display function layers,
The electrode layer of the first display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the middle electrode layer of the second display function layer group is overlapped with the metal layer through the second flat layer and the opening on the first flat layer.
10. The OLED display panel of claim 5, wherein a first flat layer is disposed between the metal layer and the first group of display function layers, a second flat layer is disposed between the second group of display function layers and the first group of display function layers,
The electrode layer of the first display function layer group is overlapped with the metal layer through the opening on the first flat layer, and the electrode layer of the second display function layer group is overlapped with the metal layer after being overlapped with the electrode layer of the first display function layer group through the opening of the second flat layer.
11. The OLED display panel of any one of claims 1-3, 5-10, further comprising a group of touch functions stacked on the group of display functions.
12. A display device comprising an OLED display panel as claimed in any one of claims 1 to 11.
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