CN113112928A - OLED display panel and OLED display device - Google Patents
OLED display panel and OLED display device Download PDFInfo
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- CN113112928A CN113112928A CN202110297339.2A CN202110297339A CN113112928A CN 113112928 A CN113112928 A CN 113112928A CN 202110297339 A CN202110297339 A CN 202110297339A CN 113112928 A CN113112928 A CN 113112928A
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Abstract
The application provides an OLED display panel and OLED display device, this OLED display panel includes flat display area and crooked display area, and wherein, crooked display area is equipped with light guide member, and light guide member is used for changing the exit direction of the light of crooked display area to the contained angle that makes the exit direction of the light of crooked display area and the exit direction of the light of flat display area is less than preset the angle. This application is through setting up light direction component at crooked display area, changes the emergent direction of the light of crooked display area for original light to both sides are dispersed becomes to the positive outgoing of display panel, and the emergent direction of the light of crooked display area and the emergent direction of the light of flat display area are less than and predetermine the angle, thereby make the luminance of each region of display panel close or even unanimous, improve display panel's the colour cast problem.
Description
Technical Field
The application relates to the technical field of display, in particular to an OLED display panel and an OLED display device.
Background
With the development of display technology, a curved display device is designed for an existing display device in order to improve screen ratio, and the display area of the display device is curved towards the back, so that side edge display of a display panel is achieved.
Therefore, the conventional curved display device has the technical problems that the brightness of the middle plane display area is inconsistent with that of the edge curved display area, and the color cast of the curved display device occurs.
Disclosure of Invention
The embodiment of the application provides an OLED display panel and an OLED display device, and aims to solve the technical problems that brightness of a middle plane display area is inconsistent with brightness of an edge bending display area in an existing bending display device, and color cast occurs in the bending display device.
The embodiment of the present application provides an OLED display panel, which includes:
a flat display area;
a curved display area;
the curved display area is provided with a light guide member, and the light guide member is used for changing the emergent direction of the light of the curved display area, so that the included angle between the emergent direction of the light of the curved display area and the emergent direction of the light of the planar display area is smaller than a preset angle.
In some embodiments, the OLED display panel includes:
a substrate;
the driving circuit layer is arranged on one side of the substrate;
the light-emitting functional layer is arranged on one side, far away from the substrate, of the driving circuit layer;
the packaging layer is arranged on one side, far away from the driving circuit layer, of the light-emitting function layer;
the light emitting functional layer comprises a common electrode, the common electrode is made of transparent materials, and the light guide member is arranged on one side, far away from the light emitting functional layer, of the packaging layer.
In some embodiments, the light guide member comprises a base layer disposed between the light guide layer and the encapsulation layer and a light guide layer disposed at the curved display region.
In some embodiments, the OLED display panel includes pixel units arranged in an array, and the light guide layer includes a plurality of light guide units arranged corresponding to the pixel units.
In some embodiments, the angles formed by the light guide units and the encapsulation layer are sequentially reduced along the direction away from the flat display area, and the heights of the light guide units are sequentially increased along the direction away from the flat display area.
In some embodiments, an angle formed by the light guide unit and the encapsulation layer ranges from 0.1 degree to 90 degrees.
In some embodiments, the base layer is formed with a protrusion and the encapsulation layer is formed with a recess, the protrusion mating with the recess.
In some embodiments, the material of the light directing member comprises an optical fiber.
In some embodiments, the OLED display panel includes:
a substrate;
the driving circuit layer is arranged on one side of the substrate;
the light-emitting functional layer is arranged on one side, far away from the substrate, of the driving circuit layer;
the packaging layer is arranged on one side, far away from the driving circuit layer, of the light-emitting function layer;
the light-emitting functional layer comprises a pixel electrode, the pixel electrode is made of transparent materials, and the light guide member is arranged on one side, far away from the driving circuit layer, of the substrate.
Meanwhile, an embodiment of the present application provides an OLED display device, which includes an OLED display panel and a cover plate, where the OLED display panel includes:
a flat display area;
a curved display area;
the curved display area is provided with a light guide member, and the light guide member is used for changing the emergent direction of the light of the curved display area, so that the included angle between the emergent direction of the light of the curved display area and the emergent direction of the light of the planar display area is smaller than a preset angle.
Has the advantages that: the application provides an OLED display panel and OLED display device, this OLED display panel includes flat display area and crooked display area, and wherein, crooked display area is equipped with light guide member, and light guide member is used for changing the exit direction of the light of crooked display area to the contained angle that makes the exit direction of the light of crooked display area and the exit direction of the light of flat display area is less than preset the angle. This application is through setting up light direction component at crooked display area, changes the emergent direction of the light of crooked display area for original light to both sides are dispersed becomes to the positive outgoing of display panel, and the emergent direction of the light of crooked display area and the emergent direction of the light of flat display area are less than and predetermine the angle, thereby make the luminance of each region of display panel close or even unanimous, improve display panel's the colour cast problem.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a conventional four-curved-surface display device.
Fig. 2 is another schematic diagram of a conventional four-curved-surface display device.
Fig. 3 is a first schematic view of an OLED display panel according to an embodiment of the present disclosure.
Fig. 4 is a second schematic view of an OLED display panel according to an embodiment of the present disclosure.
Fig. 5 is a third schematic view of an OLED display panel according to an embodiment of the present application.
Fig. 6 is a fourth schematic view of an OLED display panel according to an embodiment of the present application.
Fig. 7 is a fifth schematic view of an OLED display panel according to an embodiment of the present disclosure.
Fig. 8 is a schematic view of an OLED display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 and 2, taking a four-curved-surface display device as an example, in order to improve the screen occupation ratio of the conventional display device 1, the display area of the display device 1 is bent toward the back surface, so that four side surfaces of the display device 1 form arc surfaces, and both the plane and the four side surfaces of the display device 1 can display, thereby improving the screen occupation ratio of the display device 1. Specifically, the upper curved surface display area 11, the right curved surface display area 12, the lower curved surface display area 13, the left curved surface display area 14, and the flat surface display area 15 in fig. 1 can be displayed. As shown in fig. 2 (a) and fig. 2 (b), after the display device 1 is manufactured, the display device 1 may be bent to the back to obtain a lateral display area, but in the display process, as shown in fig. 2 (b), as each film layer in the display device 1 is bent, when the light ray 16 exits, the angle of the light ray 16 changes, specifically, the light ray diverges to both sides of the display device, so that the brightness of the middle plane display area and the edge bent display area of the display device 1 are not the same, and the display device is color shifted. Therefore, the existing display device has the technical problems that the brightness of the middle plane display area is inconsistent with that of the edge bending display area, and the color cast of the bending display device occurs.
In view of the above technical problems, embodiments of the present invention provide an OLED (Organic Light-Emitting Diode) display panel and an OLED display device to alleviate the above technical problems.
As shown in fig. 3 and 5, an embodiment of the present application provides an OLED display panel, including:
a flat display region 281;
a curved display area 282;
the curved display area 282 is provided with a light guiding member 27, and the light guiding member 27 is configured to change the emitting direction of the light of the curved display area 282, so that an included angle between the emitting direction of the light 312 of the curved display area 282 and the emitting direction of the light 311 of the flat display area 281 is smaller than a preset angle.
The embodiment of the application provides an OLED display panel, this OLED display panel is through setting up light guide member at crooked display area, change the outgoing direction of the light of crooked display area, make originally become to the positive outgoing of display panel to the light that both sides are dispersed, the outgoing direction of the light of crooked display area and the contained angle of the outgoing direction of the light of plane display area are less than and predetermine the angle, thereby make the luminance of each region of display panel close or even unanimous, improve display panel's colour cast problem.
It should be noted that the included angle between the outgoing direction of the light of the curved display area and the light of the flat display area is 0 to 90 degrees, when the outgoing direction of the light of the curved display area is consistent with the outgoing direction of the light of the flat display area, that is, the directions of the light of the curved display area and the light of the flat display area are parallel (for example, as shown in fig. 5), that is, the included angle between the outgoing direction of the light of the curved display area and the light of the flat display area is 0 degree, and when the light of the curved display area is completely emitted from the side surface, the included angle between the outgoing direction of the light of the curved display area and the light of the flat display area is 90 degrees.
In the following embodiments, the curved display area is disposed on the side of the display panel, but the light guide member in the present application may be used to improve color shift for display panels having other curved display areas.
In an embodiment, the predetermined angle is 10 degrees, that is, the included angle between the exit direction of the light in the curved display area and the exit direction of the light in the flat display area is smaller than 10 degrees, so that the brightness of the curved display area is similar to or even consistent with the brightness of the flat display area, thereby improving the color shift of the display panel.
In the following embodiments, the angle between the exit direction of the light of the curved display area and the exit direction of the light of the flat display area is 0 degree, but the present application does not limit the angle between the exit direction of the light of the curved display area and the exit direction of the light of the flat display area by the light guide member to 0 degree, and other light guide members capable of improving color shift are also included in the embodiments of the present application.
The problem that when light is emitted from the common electrode, the common electrode is bent due to the fact that the display panel is bent, and the emitting direction of the light in the bent area is not consistent with the emitting direction of the light in the plane area is solved. In one embodiment, as shown in fig. 3 and 4, the OLED display panel includes:
a substrate 21;
a driver circuit layer 24 provided on one side of the substrate 21;
a light emitting function layer 25 disposed on a side of the driving circuit layer 24 away from the substrate 21;
an encapsulation layer 26 disposed on a side of the light-emitting functional layer 25 away from the driving circuit layer 24;
the light-emitting functional layer 25 includes a common electrode 254, the common electrode 254 is made of a transparent material, and the light guide member 27 is disposed on a side of the encapsulation layer 26 away from the light-emitting functional layer 25. Through setting up the light guide member outside the encapsulation layer for light is behind public electrode and encapsulation layer transmission, and the light guide member that is located the bending region changes the outgoing direction of light, makes the outgoing direction that is located the light of crooked display area unanimous with the outgoing direction that is located the light of plane display area, thereby makes the display brightness unanimity in plane display area and crooked display area, improves display panel's colour cast.
In one embodiment, as shown in fig. 3, the light guide member 27 includes a base layer 271 and a light guide layer 272, the base layer 271 is disposed between the light guide layer 272 and the encapsulation layer 26, and the light guide layer 272 is disposed in the curved display region. In the setting-up process of light guide member, can make light guide member and packaging layer laminating set up, specifically through setting up stratum basale and leaded light layer, make stratum basale and the better laminating of packaging layer formation, and the leaded light layer carries out the direction of light, make and be equipped with the stratum basale in the plane display district, light normally launches away, and be equipped with stratum basale and leaded light layer in crooked display district, the light that launches from the packaging layer leads through the direction on leaded light layer, the outgoing direction of the light in crooked display district and plane display district is unanimous, improve display panel's colour cast.
Need bend to leaded light layer setting in-process, lead to leaded light layer to have the problem that drops. In one embodiment, the base layer is integral with the light guide layer. When setting up light guide member promptly for light guide member sets up as an organic whole, then when setting up through stratum basale and encapsulation layer laminating, when crooked OLED display panel, the problem that leaded light layer drops can not appear.
In one embodiment, the OLED display panel includes pixel units arranged in an array, and the light guide layer includes a plurality of light guide units arranged corresponding to the pixel units. In the setting process of the light guide layer, the light emitting area of the display panel is considered to be formed by the pixel units arranged in an array, when the light guide layer is set, each light guide unit is enabled to be arranged corresponding to the pixel units, then light is normally emitted at the pixel units of the plane display area, and at the pixel units of the bending display area, the light is emitted from the light guide unit, the light guide unit changes the emergent direction of the light, the emergent directions of the light of the plane display area and the light of the bending display area are enabled to be consistent, and the emergent of the light of other areas cannot be influenced due to the fact that the light guide unit is arranged on the pixel units of the bending display area, and the color cast of the display panel is improved.
When the light guide unit and the pixel unit are correspondingly arranged, in order to reduce the process difficulty of the light guide unit, the basal layer and the light guide unit can be separately arranged, so that the light guide unit is formed according to the requirement, the difficulty is high when the light guide unit is integrally formed, and the problem that the formed light guide component cannot be in one-to-one correspondence with the pixel unit is solved.
The different bending angles of the parts in the bending area of the display panel lead to different outgoing directions of the light rays, and thus the different outgoing angles of the parts in the bending area of the display panel. In one embodiment, as shown in fig. 3, angles formed by the light guiding units 272 and the encapsulation layer 26 are sequentially decreased in a direction away from the planar display region 281, and heights of the light guiding units 272 are sequentially increased in a direction away from the planar display region 281. That is, the angle a is larger than the angle b and the angle b is larger than the angle c in fig. 3, and the heights of the light guide units are sequentially increased as shown in fig. 3. When the bending angles of the display panels are different, corresponding light guide units are arranged for all areas of the display panels, so that the bending angles of the light guide units and the display panels are opposite, after light rays of all parts in the bent display areas pass through the packaging layer and the light ray guide members, the emergent directions of the light rays of the bent display areas are the same as the emergent direction of the light rays of the flat display areas, and the color cast of the display panels is improved.
In one embodiment, an angle formed by the light guide unit and the encapsulation layer ranges from 0.1 degree to 90 degrees. Regarding the angle of the light guide unit, the light guide unit may be designed to be opposite to the bending angle of other film layers of the display panel by the design angle of the OLED display panel, and considering that the bending angle of the display panel is 0.1 to 90 degrees, the angle of the light guide unit and the encapsulation layer may be designed to be 0.1 to 90 degrees.
In one embodiment, the curved display regions include a first curved display region, a second curved display region, a third curved display region and a fourth curved display region located on four sides of the flat display region, the light guide members are disposed on the first curved display region, the second curved display region, the third curved display region and the fourth curved display region, and for an OLED display panel with a four-curved surface design, the light guide members may be disposed in each curved region, so that after light rays in each curved region pass through the light guide members, the outgoing direction of the light rays is consistent with the outgoing direction of the flat display region of the OLED display panel, thereby improving color cast of the OLED display panel.
The problem that the light guide member may fall off when the light guide member is attached to the packaging layer is solved. As shown in fig. 6, in one embodiment, the base layer 271 is formed with a protrusion, and the encapsulation layer 26 is formed with a groove 41, and the protrusion is matched with the groove 41. When forming light guide member and encapsulation layer promptly, make light guide member and encapsulation layer pass through recess and bellied cooperation, can comparatively inseparable connection, avoid appearing the problem that drops of light guide member at OLED display panel's bending in-process.
Specifically, the protrusion may be formed on the substrate layer, and taking an encapsulation layer including the first inorganic layer, the organic layer, and the second inorganic layer as an example, the groove may be formed on the second inorganic layer, so that the encapsulation performance of the OLED display panel is not affected, and the adhesion effect between the encapsulation layer and the light guide member is improved.
Specifically, as shown in fig. 6, when the groove and the protrusion are used for matching, the light guide member partially using the groove and the protrusion still has a problem of falling off, the groove 41 is designed to have an undercut shape, so that the light guide member is combined with the encapsulation layer more tightly, and the light guide member is ensured not to fall off due to the matching of the undercut.
In one embodiment, the groove and the protrusion are disposed in the flat display area. Through setting up recess and arch in the flat display district for recess and arch can not influence the exit angle of light, avoid protruding and the junction of recess to produce the change to display panel's angle after crooked display district, thereby make OLED display panel's light unanimous at the exit direction of flat display and crooked display district, improve OLED display panel's colour cast problem.
In one embodiment, the light guide member includes a light guide layer, the light guide layer is disposed on a side of the encapsulation layer away from the light emitting functional layer, that is, when the light guide member is disposed, the light guide layer is directly disposed on the encapsulation layer, and the light guide layer changes the direction of the light of the curved display region, so that the emitting directions of the light of the curved display region and the light of the flat display region are the same; meanwhile, a substrate layer is not arranged, so that the thickness of the OLED display panel is prevented from being large.
In one embodiment, the material of the light directing member comprises an optical fiber. In order not to change the light characteristics, the light guide member is formed by using the optical fiber in the curved display region so that only the exit angle of the light is changed without affecting the characteristics of the light such as brightness. Specifically, the light guide member is formed by adding a light adjusting material to silicon dioxide, and the light adjusting material comprises zirconium fluoride and lanthanum fluoride.
The OLED display panel aims at the problem that the emergent directions of light rays emitted by pixel electrodes in a curved display area and a flat display area are inconsistent, so that the brightness of the curved display area and the brightness of the flat display area are inconsistent, and color cast occurs. In one embodiment, as shown in fig. 7, the OLED display panel includes:
a substrate 21;
a driver circuit layer 24 provided on one side of the substrate 21;
a light emitting function layer 25 disposed on a side of the driving circuit layer 24 away from the substrate 21;
an encapsulation layer 26 disposed on a side of the light-emitting functional layer 25 away from the driving circuit layer 24;
the light emitting function layer 25 includes a pixel electrode made of a transparent material, and the light guide member 27 is disposed on a side of the substrate 21 away from the driving circuit layer 24. For the OLED display panel with light emitted out through the pixel electrode, the light guide member is arranged on one side of the substrate, so that after the light is emitted out of the substrate, the direction of the light in the bent display area is changed by the light guide member, the emitting directions of the light in the bent display area and the light in the plane display area are consistent, and the color cast of the OLED display panel is improved.
The problem that the subsequent film layer cannot be arranged due to the fact that the light guide member protrudes on the display panel is solved. In one embodiment, as shown in fig. 8, the OLED display panel further includes a filling layer 61, and the filling layer 61 is disposed on the light guide member 27. After the light guide member is formed, the filling layer is disposed between the respective gaps of the light guide member by disposing the filling layer on the light guide member. For example, the light guide member comprises a substrate layer and a light guide layer, the light guide layer is arranged in the bent display area, the filling layer can be filled between the light guide layers, and after the filling layer is arranged, the OLED display panel forms a flat surface, so that the subsequent touch control film layer and the cover plate can be formed and attached conveniently.
Specifically, the material of the filling layer comprises an organic material, and the organic material with better light transmittance is selected to form the filling layer, so that the subsequent film layer is conveniently formed while the display effect is not influenced.
In one embodiment, as shown in fig. 4, the OLED display panel includes a barrier layer 22 and a buffer layer 23, and the driving circuit layer 24 includes an active layer 241, a first gate insulating layer 242, a first metal layer 243, a second gate insulating layer 244, a second metal layer 245, an interlayer insulating layer 246, a source drain layer 247, and a planarization layer 248; the light emitting function layer 25 includes a pixel electrode 251, a pixel defining layer 252, a light emitting material layer 253, and a common electrode 254. However, the embodiment of the application is not limited thereto, and for OLED display panels of other designs, the light exit direction may be changed by the light guide member, so as to improve the color shift of the OLED display panel.
In one embodiment, in order to facilitate alignment between the light guide member and the encapsulation layer, the light guide member may be disposed before the encapsulation layer is not bent, and after the light guide member is disposed, the encapsulation layer and the light guide member are simultaneously bent to form the bent OLED display panel. However, the present invention is not limited thereto, and in order to better control the angle of the light, a light guide member may be disposed on the encapsulation layer after the film layer such as the encapsulation layer is bent.
Meanwhile, as shown in fig. 5 and 8, the present application provides an OLED display device including an OLED display panel and a cover plate 62, the OLED display panel including:
a flat display region 281;
a curved display area 282;
the curved display area 282 is provided with a light guiding member 27, and the light guiding member 27 is configured to change the emitting direction of the light of the curved display area 282, so that an included angle between the emitting direction of the light 312 of the curved display area 282 and the emitting direction of the light 311 of the flat display area 281 is smaller than a preset angle.
The embodiment of the application provides an OLED display device, this OLED display device includes OLED display panel and apron, this OLED display panel is through setting up light guide member at crooked display area, change the exit direction of the light of crooked display area, make original light of dispersing to both sides become to the positive outgoing of display panel, the exit direction of the light of crooked display area and the exit direction of the light of flat display area are less than preset angle, thereby make the luminance of each region of display panel close or even unanimous, improve display panel's colour cast problem.
According to the above embodiment:
the embodiment of the application provides an OLED display panel and OLED display device, this OLED display panel includes flat display area and crooked display area, and wherein, crooked display area is equipped with light guide member, and light guide member is used for changing the exit direction of the light of crooked display area to the contained angle that makes the exit direction of the light of crooked display area and the exit direction of the light of flat display area is less than preset angle. This application is through setting up light direction component at crooked display area, changes the emergent direction of the light of crooked display area for original light to both sides are dispersed becomes to the positive outgoing of display panel, and the emergent direction of the light of crooked display area and the emergent direction of the light of flat display area are less than and predetermine the angle, thereby make the luminance of each region of display panel close or even unanimous, improve display panel's the colour cast problem.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The OLED display panel and the OLED display device provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the description of the embodiments above is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. An OLED display panel, comprising:
a flat display area;
a curved display area;
the curved display area is provided with a light guide member, and the light guide member is used for changing the emergent direction of the light of the curved display area, so that the included angle between the emergent direction of the light of the curved display area and the emergent direction of the light of the planar display area is smaller than a preset angle.
2. The OLED display panel of claim 1, wherein the OLED display panel comprises:
a substrate;
the driving circuit layer is arranged on one side of the substrate;
the light-emitting functional layer is arranged on one side, far away from the substrate, of the driving circuit layer;
the packaging layer is arranged on one side, far away from the driving circuit layer, of the light-emitting function layer;
the light emitting functional layer comprises a common electrode, the common electrode is made of transparent materials, and the light guide member is arranged on one side, far away from the light emitting functional layer, of the packaging layer.
3. The OLED display panel of claim 2, wherein the light guide member includes a base layer disposed between the light guide layer and the encapsulation layer and a light guide layer disposed on the curved display region.
4. The OLED display panel of claim 3, wherein the OLED display panel comprises pixel units arranged in an array, the light guide layer comprises a plurality of light guide units, and the light guide units are arranged corresponding to the pixel units.
5. The OLED display panel of claim 4, wherein the angles formed by the light guide units and the encapsulation layers are sequentially decreased in a direction away from the flat display area, and the heights of the light guide units are sequentially increased in a direction away from the flat display area.
6. The OLED display panel of claim 4, wherein the light guide unit forms an angle with the encapsulation layer ranging from 0.1 degrees to 90 degrees.
7. The OLED display panel of claim 3, wherein the base layer is formed with a protrusion, and the encapsulation layer is formed with a groove, the protrusion mating with the groove.
8. The OLED display panel of claim 2, wherein the material of the light guide member includes an optical fiber.
9. The OLED display panel of claim 1, wherein the OLED display panel comprises:
a substrate;
the driving circuit layer is arranged on one side of the substrate;
the light-emitting functional layer is arranged on one side, far away from the substrate, of the driving circuit layer;
the packaging layer is arranged on one side, far away from the driving circuit layer, of the light-emitting function layer;
the light-emitting functional layer comprises a pixel electrode, the pixel electrode is made of transparent materials, and the light guide member is arranged on one side, far away from the driving circuit layer, of the substrate.
10. An OLED display device comprising an OLED display panel and a cover plate, the OLED display panel comprising:
a flat display area;
a curved display area;
the curved display area is provided with a light guide member, and the light guide member is used for changing the emergent direction of the light of the curved display area, so that the included angle between the emergent direction of the light of the curved display area and the emergent direction of the light of the planar display area is smaller than a preset angle.
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| CN202110297339.2A CN113112928A (en) | 2021-03-19 | 2021-03-19 | OLED display panel and OLED display device |
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