CN110137232B - Organic light emitting display panel and display device - Google Patents
Organic light emitting display panel and display device Download PDFInfo
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- CN110137232B CN110137232B CN201910447001.3A CN201910447001A CN110137232B CN 110137232 B CN110137232 B CN 110137232B CN 201910447001 A CN201910447001 A CN 201910447001A CN 110137232 B CN110137232 B CN 110137232B
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Abstract
The invention describes an organic light emitting display panel and a display device. The organic light emitting display panel includes a light emitting layer including a plurality of light emitting cells; a polarizing plate including a substrate and a doping material; the polarizing plate at least comprises a first polarizing region and a second polarizing region, the arrangement direction of the doping materials in the first polarizing region is different from that of the doping materials in the second polarizing region, the polarization axis direction of the first polarizing region is the first polarizing direction, the polarization axis direction of the second polarizing region is the second polarizing direction, and the first polarizing direction is vertical to the second polarizing direction; the light emitted by the light emitting units of the same color at least has a first polarization direction and a second polarization direction after passing through the polarizing plate. Compared with the traditional organic light-emitting display panel, the organic light-emitting display panel provided by the invention has the advantages that the light emitting direction has two mutually perpendicular polarization directions, and can be similar to natural light, so that an observer can see a good display effect even when wearing polarized glasses.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display, also called an Organic electroluminescent display, is a new flat panel display device, and has the advantages of simple manufacturing process, low cost, low power consumption, high brightness, wide application range of operating temperature, Light and thin volume, fast response speed, easy realization of color display and large-screen display, easy realization of matching with an integrated circuit driver, easy realization of flexible display, and the like, so that the OLED display has a wide application prospect.
OLEDs can be classified into two major categories, namely, direct addressing and Thin Film Transistor (TFT) Matrix addressing, namely, Passive Matrix OLEDs (PMOLEDs) and Active Matrix OLEDs (AMOLEDs) according to driving methods. The AMOLED has pixels arranged in an array, belongs to an active display type, has high luminous efficiency, and is generally used as a large-sized display device with high definition.
A polarizer is one of key components of a display, fig. 1 is a schematic diagram of an organic light emitting display panel in the prior art, and as shown in fig. 1, the organic light emitting display panel includes an organic light emitting display substrate 00 and a polarizer 01 including an adhesive layer 011, a first protective layer 012, a polarizing film 013, and a second protective layer 014, which are sequentially stacked, generally, the first protective layer 012 and the second protective layer 014 are made of the same material and are cellulose Triacetate (TAC), and the polarizing film 013 is generally made of polyvinyl alcohol (PVA). The existing polarizing film mainly includes an iodine-based polarizing film, which is made by stretching polyvinyl alcohol doped with iodine molecules, and a dye-based polarizing film, which is made by stretching polyvinyl alcohol doped with dichroic organic dyes. The polarizing film has a function of absorbing and transmitting incident light, transmits polarized light in one direction, absorbs polarized light in the other direction, and has a polarizing property.
At present, the thick polaroid that piles up of rete among the prior art is unfavorable for display panel's flexibility and frivolous function, and the light that linear polarization piece can produce OLED display screen self absorbs to the luminous energy that leads to OLED display screen to produce has half at least to be absorbed, greatly reduced OLED display screen's luminous efficacy. For a long time, people are always searching for new polaroids to better adapt to the development trend of OLED display.
Disclosure of Invention
In view of the above, the present invention provides an organic light emitting display panel, so that the light emitted from the organic light emitting display panel has two polarization directions perpendicular to each other, and can be approximated to natural light, so that an observer can see a good display effect even when wearing polarized glasses.
In a first aspect, the present invention provides an organic light emitting display panel and a display device.
The invention provides an organic light emitting display panel, comprising
A substrate;
the array layer is positioned on one side of the substrate;
the light-emitting layer is positioned on one side, away from the substrate, of the array layer, and comprises a plurality of light-emitting units;
the polaroid is positioned on one side of the light-emitting layer, which is far away from the substrate, and comprises a base material and a doping material;
the polarizing plate at least comprises a first polarizing region and a second polarizing region, the arrangement direction of the doping materials in the first polarizing region is different from that of the doping materials in the second polarizing region, the polarization axis direction of the first polarizing region is a first polarizing direction, the polarization axis direction of the second polarizing region is a second polarizing direction, and the first polarizing direction is perpendicular to the second polarizing direction;
the light emitted by the light emitting units of the same color at least has the first polarization direction and the second polarization direction after passing through the polarizing plate.
Based on the same inventive concept, the invention also provides a display device comprising any one of the organic light emitting display panels provided by the invention.
Compared with the prior art, the organic light-emitting display panel and the display device provided by the invention at least realize the following beneficial effects:
the organic light emitting display panel provided by the invention comprises a substrate; the array layer is positioned on one side of the substrate; the light-emitting layer is positioned on one side, away from the substrate, of the array layer, and comprises a plurality of light-emitting units; the polaroid is positioned on one side of the light-emitting layer, which is far away from the substrate, and comprises a base material and a doping material; the polarizing plate at least comprises a first polarizing region and a second polarizing region, the arrangement direction of the doping materials in the first polarizing region is different from that of the doping materials in the second polarizing region, the polarization axis direction of the first polarizing region is a first polarizing direction, the polarization axis direction of the second polarizing region is a second polarizing direction, and the first polarizing direction is perpendicular to the second polarizing direction; the light emitted by the light emitting units of the same color at least has the first polarization direction and the second polarization direction after passing through the polarizing plate. Compared with the traditional organic light-emitting display panel, the organic light-emitting display panel provided by the invention has the advantages that the light emitting direction has two mutually perpendicular polarization directions, and can be similar to natural light, so that an observer can see a good display effect even when wearing polarized glasses.
Drawings
FIG. 1 is a schematic view of a prior art polarizer;
fig. 2 is a schematic diagram of an alternative embodiment of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 3 is a front view of an alternative embodiment of the organic light emitting display panel shown in FIG. 2;
fig. 4 is a schematic diagram of an alternative implementation of a polarizer of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 5 is a front view of an alternative embodiment of the organic light emitting display panel shown in FIG. 2;
FIG. 6 is a front view of an alternative embodiment of the organic light emitting display panel shown in FIG. 2;
FIG. 7 is a front view of an alternative embodiment of the organic light emitting display panel shown in FIG. 2;
fig. 8 is a schematic diagram of another alternative embodiment of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 9 is a front view of an alternative embodiment of the organic light emitting display panel shown in FIG. 8;
fig. 10 is a schematic diagram of still another alternative implementation of a polarizer of an organic light emitting display panel according to an embodiment of the present invention;
fig. 11 is a schematic view of a display device according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 2 is a schematic diagram of an alternative implementation of an organic light emitting display panel according to an embodiment of the present invention. Fig. 3 is a front view of an alternative embodiment of the organic light emitting display panel shown in fig. 2.
As shown in fig. 2, the organic light emitting display panel includes: a substrate 101; an array layer 102 on one side of the substrate 101, wherein optionally, the array layer 102 includes a plurality of thin film transistors (not shown in the figure) including a gate, a source and a drain; a light emitting layer 103 located on a side of the array layer 102 away from the substrate 101, wherein the light emitting layer 103 includes a plurality of light emitting units 1031, and optionally, the light emitting units include a first color light emitting unit 10311, a second color light emitting unit 10312, and a third color light emitting unit 10313; alternatively, the first, second, and third color light-emitting units 10311, 10312, and 10313 are red, green, and blue light-emitting units, respectively; alternatively, the light emitting unit 1031 may be an organic light emitting device including an anode, a display layer, and a cathode.
Optionally, the display panel further includes an encapsulation structure 104, the encapsulation structure 104 is located on a side of the light emitting layer away from the array layer 102, the encapsulation structure 104 surrounds and covers the light emitting layer 103, and the encapsulation structure 104 can isolate water and oxygen, protect the light emitting unit 1031 in the light emitting layer 103, and ensure the service life of the display panel. The encapsulation structure may be a thin film encapsulation layer including at least one organic encapsulation layer and at least one inorganic encapsulation layer. The inorganic packaging layer can play a good role in blocking water and oxygen due to high compactness of the inorganic material, the organic material has good flexibility, so that the organic packaging layer can help release stress borne by the inorganic packaging layer, the risk of cracks on the inorganic packaging layer is reduced, the effectiveness of integral packaging can be ensured due to the stacking arrangement of the organic packaging layer and the inorganic packaging layer, and the integral bending resistance of the display panel is improved; the encapsulation structure may also be a rigid encapsulation.
The organic light-emitting display panel further includes a polarizing plate 105, the polarizing plate 105 being located on the side of the light-emitting layer 103 away from the substrate 101, wherein the polarizing plate includes a substrate 1051 and a doping material 1052;
alternatively, the substrate 1051 may be selected from one or more of cellulose triacetate, polyimide, polystyrene, cellulose derivatives, polyamic acid, polypropylene, polyamide, polyester, acrylic polymers, saponified ethylene-vinyl acetate copolymers, and the like. Optionally, the substrate 1051 is polyimide, which has high temperature and high humidity resistance, so that a TAC protective layer and an adhesive layer are not required, the thickness of the polarizer can be greatly reduced, and the thinning of the polarizer is realized.
The doped material 1052 has optical orientation and alignment properties after polarization processing, which refers to high energy processing, such as processing of the material by acoustic, optical, electrical, thermal, magnetic, and the like. Alternatively, the high energy treatment is to irradiate the doped material 1052 with light or electromagnetic waves. Optionally, the doped material 1052 is a dichroic organic dye. Optionally, the doped material 1052 is an azo-based dichroic organic dye or a stilbene-based dichroic dye. Optionally, the doped material 1052 may also be selected from benzidine, dinaphthylamine, and J-acid, and may be polarized.
In the present invention, the polarizer 105 is irradiated with light and electromagnetic waves, the polarizer is subjected to high-energy treatment to have an alignment function, and by irradiating different regions with light or electromagnetic waves of different polarization directions, the doping material 1052 has different orientation directions, thereby realizing different polarization directions in different regions of the polarizer. The polarizing plate at least comprises a first polarizing region and a second polarizing region, wherein the arrangement direction of doping materials in the first polarizing region is different from that of the doping materials in the second polarizing region, the polarization axis direction of the first polarizing region is a first polarizing direction, the polarization axis direction of the second polarizing region is a second polarizing direction, and the first polarizing direction is vertical to the second polarizing direction; the light emitted by the light emitting units of the same color at least has a first polarization direction and a second polarization direction after passing through the polarizing plate.
Fig. 3 is a front view of an alternative embodiment of the organic light emitting display panel shown in fig. 2. As shown in fig. 2 and fig. 3, the polarizer 105 at least includes a first polarization region I and a second polarization region II, an arrangement direction of the doped material 1052 in the first polarization region I is different from an arrangement direction 1052 of the doped material in the second polarization region II, a polarization axis direction of the first polarization region I is a first polarization direction X, a polarization axis direction of the second polarization region II is a second polarization direction Y, and the first polarization direction X is perpendicular to the second polarization direction Y. The light emitting units 1031 of the same color pass through the polarizing plate 105 and have at least a first polarization direction X and a second polarization direction Y. As shown in fig. 3, the light emitted by the first color light emitting unit 10311, the second color light emitting unit 10312, and the third color light emitting unit 10313 all pass through the first polarization region I and the second polarization region II, that is, the orthographic projections of the light emitting units 1031 of the same color on the film layer where the polarizing plate 105 is located are located in the first polarization region I and the second polarization region II, and the light emitted by the light emitting units of the same color at least has the first polarization direction X and the second polarization direction Y after passing through the polarizing plate 105; as shown in fig. 3, Z in the first color light emitting unit 103111Light emitting unit and Z2Orthographic projections of the light-emitting units on the film layer on which the polarizing plate 105 is located are respectively located in a first polarization area I and a second polarization area II, and light emitted by the first color light-emitting unit 10311 at least has a first polarization direction X of the first polarization area I and a second polarization direction Y of the second polarization area II.
The polarization axis direction of a certain polarization region of the polarizer is defined as the polarization direction of the emergent light emitted by the light emitting unit of the organic light emitting display panel after passing through the polarization region, the polarization axis direction of a certain polarization region of the polarizer is perpendicular to the absorption axis of the polarization region, and the light along the absorption axis direction of the polarization region is absorbed when passing through the polarization region, so that the polarization direction of the emergent light emitted by the light emitting unit after passing through the polarization region is the polarization axis direction. If the whole surface of the polaroid is a polarization area, namely the doped materials are all arranged along one direction in an oriented mode, the polaroid is weak in stress relieving capacity, and bending resistance of the organic light-emitting display panel is reduced.
Further, the conventional organic light emitting display panel needs a multiple-bonding process for polarizing films with different polarization directions in different regions, the bonding process not only complicates the process, but also the conventional polarizing film has defects of deviation, bubbles and the like in bonding, thereby causing a series of optical display problems and affecting the packaging reliability, for example, the multiple-bonding process error of the light emitting surface of the display panel causes different film thicknesses, and causes different transmittances. The organic light-emitting display panel provided by the invention has the advantages that the polarizing film prepared by doping the doping material into the base material by using the light alignment method can ensure that the polarizing film at least has two polarization areas with vertical polarization axis directions, so that the light emitted by the organic light-emitting display panel has two polarization directions which are vertical to each other, and the natural light can be similar to the good display effect of an observer even when wearing polarized glasses, meanwhile, the polarizing film with one polarization area is adopted on the whole surface, namely the doping material is directionally arranged along one direction after being subjected to polarization treatment, the extension distance is longer along the same direction, the directional arrangement capacity of the doping material is limited, the polarization performance of the polarizing film is poorer, the polarized light in other directions exists in the emergent light, the display is further influenced, the adopted light alignment method is favorable for directly preparing the polarizing film, the preparation of the regionalization polarizing film (with a plurality of polarization areas) effectively solves the phenomenon of incomplete polarizing film, and the polaroid that forms through above-mentioned mode can also effectively avoid laminating problem and alignment accuracy in the traditional polaroid, to this proposal polaroid, only can reduce the technology degree of difficulty through above-mentioned this mode and prevent that the polaroid from droing, has promoted polaroid laminating precision, also can the emergent light be close to do benefit to the observer for the natural light and observe.
Compared with the traditional organic light-emitting display panel, the organic light-emitting display panel provided by the invention has the advantages that on one hand, the polarizer is manufactured by using a light alignment method, the flexibility is good, the production efficiency can be improved, the thinning can be realized, the cost can be saved, and the process can be simplified; on the other hand, the polarizer prepared by the photo-alignment method can avoid bad optical effect and influence on packaging reliability caused by defects such as traditional polarizer attaching deviation and bubbles, and can improve the attaching accuracy of the polarizer and the display panel; in another aspect, the light emitted from the organic light-emitting display panel has two polarization directions, and the polarizers are arranged regionally, that is, the absorption axes of the polarizers in each region are different, so that the bending resistance of the organic light-emitting display panel can be improved; on the other hand, the light emitted from the organic light-emitting display panel has two mutually perpendicular polarization directions, so that natural light can be approximated to achieve a good display effect even when an observer wears the polarized glasses, and the user experience is improved.
It should be noted that the arrangement of the first polarization region and the second polarization region of the polarizer provided in the present invention is merely exemplary, but the present invention is not limited thereto; the specific directions of the first polarization direction and the second polarization direction are not limited in the present invention, and only the first polarization direction and the second polarization direction need to be perpendicular.
Optionally, the specific process of the polarizer provided in this embodiment includes:
the method comprises the following steps: a substrate is provided.
Specifically, the substrate provided above is a CF substrate or a TFT substrate, and may be a layer of the embodiments disclosed in this document, and may be any layer in a display panel.
Step two: the doping material 1052 is mixed in the base material 1051 and coated on the surface side of the substrate to form the polarizing plate 105.
Step three: the doped material 1052 is pre-baked.
Step four: the doped material 1052 is polarized, and the polarizer includes at least two regions, a first polarization region and a second polarization region, and light or electromagnetic waves with different polarization directions are respectively applied to the polarization regions.
Specifically, the doping material after the pre-baking process is irradiated with polarized light of light or electromagnetic waves, so that the doping material has a directional arrangement performance, the polarization axis directions of the first polarization region and the second polarization region in the polarizer provided by the present invention are the first polarization direction and the second polarization direction, respectively, wherein the first polarization direction is perpendicular to the second polarization direction, and then the polarization process is performed on the doping material 1052, and the light or electromagnetic waves adopted by the first polarization region and the second polarization region in different polarization axis directions also have perpendicular directions, so that the first polarization direction and the second polarization direction of the first polarization region and the second polarization region in the polarizer can be ensured to be perpendicular.
Step five: and baking and curing the polaroid irradiated by the light or the electromagnetic wave to finally form the polaroid with two polarization areas with the polarization axes in the vertical directions.
In the fourth step, the doping material in the polarizer is irradiated with light or electromagnetic waves of different polarization directions at least twice; optionally, the light or electromagnetic wave in the same direction is used for both the front and the back light in the preparation, the bearing substrate in the first step is rotated by an angle, the included angle of the bearing substrate relative to the polarization direction of the light or electromagnetic wave is changed, which is equivalent to that the first polarization region and the second polarization region are irradiated by the light or electromagnetic wave in different polarization directions, optionally, the light or electromagnetic wave in different polarization directions is used for the front and the back light in the preparation, and the bearing substrate in the first step is kept stationary.
The polaroid provided by the invention has the advantages of simple manufacturing process, low cost and high controllability.
Optionally, the area of the first polarization region is S1The area of the second polarization region is S2In which S is1＝S2。
As shown in FIG. 2 and FIG. 3, the first polarization region I has an area S1The area of the second polarization region II is S2Wherein S is1＝S2(ii) a The areas of the first polarization region I and the second polarization region II are equal to each other, so that the ratio of the first polarization direction X outgoing light and the second polarization direction Y outgoing light of the light emitting unit 1031 passing through the polarizing plate 105 is ensured to be 1:1, the light-emitting of organic light-emitting display panel includes 50% first polarized positive light (first polarization direction X emergent light) and 50% second polarized light (second polarization direction Y emergent light) promptly for organic light-emitting display panel's light-emitting has two mutually perpendicular's polarization direction, and the proportion of first polarization direction X emergent light and second polarization direction Y emergent light is 1: and 1, emergent light is further close to natural light, and user experience is improved.
Optionally, the first polarization regions and the second polarization regions are arranged alternately along a first direction, the first polarization regions and the second polarization regions are arranged alternately along a second direction, and the first direction is intersected with the second direction.
Fig. 4 is a schematic diagram of an alternative implementation of a polarizer of an organic light emitting display panel according to an embodiment of the present invention. As shown in fig. 4, the polarizing plate 105 includes a first polarization region I having a first polarization direction X and a second polarization region II having a first polarization direction Y; the first polarization areas I and the second polarization areas II are arranged at intervals along a first direction, the first polarization areas I and the second polarization areas II are arranged at intervals along a second direction, and the first direction is intersected with the second direction; it should be noted that, in the present invention, only the first polarization direction X is limited to be perpendicular to the second polarization direction Y, and the specific directions of the first polarization direction X and the second polarization direction Y are not limited, where the first polarization direction X and the second polarization direction Y are not necessarily connected to the first direction and the second direction, and only one optional implementation is shown in the corresponding embodiment. First polarization zone I and second polarization zone II are along first direction and second direction alternate arrangement, form the polaroid 105 similar to "check board", 50% emergent light is first polarization direction X, 50% emergent light is second polarization direction Y, and adopt the crisscross setting of different polarization zones, the emergent light has the light of two directions of mutually perpendicular, see more near the natural light from whole, now that the observer is when wearing polarized glasses, also can have light to see through polarized glasses, more do benefit to observer's use, can see good display effect.
Optionally, the light emitting units include first color light emitting units, each of which overlaps with an orthographic projection of the substrate on E first polarization regions and F second polarization regions of the polarizer, where E is 0, 0 < F < 1, or 0 < E < 1, F is 0, and E and F are non-negative real numbers.
Fig. 5 is a front view of another alternative embodiment of the organic light emitting display panel shown in fig. 2. As shown in fig. 2 and 5, the light emitting units 1031 include first color light emitting units 10311, and a forward projection of each first color light emitting unit 10311 on the substrate 101 overlaps with a forward projection of E first polarization regions I and F second polarization regions II of the polarizing plate 105 on the substrate 101, where E is 0, 0 < F < 1, or 0 < E < 1, F is 0, and E and F are non-negative real numbers. With continued reference to fig. 2 and 5, the orthographic projection of the first color light emitting unit 10311 on the substrate 101 overlaps with the orthographic projection of the E first polarization regions I on the substrate 101, respectively, or the orthographic projection of the first color light emitting unit 10311 on the substrate 101 overlaps with the orthographic projection of the F second polarization regions II on the substrate 101, respectively, 0 < E < 1, 0 < F < 1, that is, the first polarization region I or the second polarization region II covers one complete light emitting unit 1031, and at this time, the boundary of the first polarization region I and the second polarization region II is located in the non-light emitting portion between the light emitting units 1031. Each light-emitting unit corresponds to a polarization area respectively, the emergent light corresponding to each light-emitting unit has a polarization direction, the first polarization area I and the second polarization area II are arranged alternately along the first direction and the second direction to form a polarizing film similar to a checkerboard, the orthographic projection of the light-emitting unit with the same color on the substrate is overlapped with the orthographic projection of the first polarization area I on the substrate, or the orthographic projection of the light-emitting unit with the same color on the substrate is overlapped with the orthographic projection of the second polarization area II on the substrate, the polarization direction of the emergent light with the same color has a first polarization direction X and a second polarization direction Y, and different polarization areas are arranged alternately, namely, the emergent light with different polarization directions is formed alternately, the emergent light is closer to natural light when viewed from the whole, and E is not equal to 1 and F is not equal to 1 simultaneously, the orthographic projection of each light-emitting unit 1031 on the substrate 101 completely falls into the orthographic projection of the first polarization region I or the orthographic projection of the second polarization region II on the substrate, and the junction of the first polarization region I and the second polarization region II is located in the non-light-emitting part of the light-emitting layer 103, so that the influence of the junction of the polarization regions on the light-emitting of the display panel is avoided, and the light-emitting efficiency of the organic light-emitting display panel is improved.
Optionally, the light emitting units include first color light emitting units, and a forward projection of each first color light emitting unit on the substrate overlaps with forward projections of M first polarization regions and N second polarization regions of the polarizer on the substrate, where M > 0, N > 0, and M and N are non-negative real numbers.
Fig. 6 is a front view of another alternative embodiment of the organic light emitting display panel shown in fig. 2. As shown in fig. 2 and 5, the light emitting units 1031 include first color light emitting units 10311, and a forward projection of each first color light emitting unit 10311 on the substrate 101 overlaps with a forward projection of M first polarization regions I and N second polarization regions II of the polarizing plate 105 on the substrate 101, where M > 0 and N > 0, where M and N are non-negative real numbers. As shown in fig. 6, the orthographic projection of the first color light emitting unit 10311 on the substrate 101 overlaps with both the orthographic projections of the M first polarization regions I on the substrate 101 and the N second polarization regions II, i.e. one first light emitting unit 10311 corresponds to both the first polarization region I and the second polarization region II, where M > 0, N > 0, and M, N are non-negative real numbers. Compared with the foregoing embodiments, the orthographic projection of one light-emitting unit on the substrate and the orthographic projection of the first polarization region I and the orthographic projection of the second polarization region II on the substrate are both overlapped, and the emergent light of the corresponding light-emitting unit has both the first polarization direction X and the second polarization direction Y, so that the emergent light of each light-emitting unit is ensured to have two polarized lights in mutually perpendicular directions, the emergent light is approximately natural light, which is a good display effect for an observer even wearing polarized glasses, moreover, the emergent light of each luminous unit can independently have two mutually perpendicular polarized lights, the emergent light of the organic light-emitting display panel is approximate to natural light in different pixel arrangements, the display effect of the organic light-emitting display panel is guaranteed, and the influence of the pixel arrangements on the emergent light display effect and the display effect is reduced.
It should be noted that, in the embodiment of the present invention, only the first color light emitting unit is used for exemplary illustration, and the embodiment is not limited to the first color light emitting unit, and other color light emitting units are also applicable to the corresponding description in the embodiment of the present invention, and the present invention is not limited thereto, and is not described any more.
Further, the orthographic projection of each first color light emitting unit on the substrate corresponds to the orthographic projection of M first polarization regions and N second polarization regions of a polarizing plate on the substrate, wherein M is equal to N.
With continued reference to fig. 2 and 6, the light emitting units 1031 include first color light emitting units 10311, each of the first color light emitting units 10311 overlaps with a forward projection of M first polarization regions I and N second polarization regions II of the polarizing plate 105 on the substrate 101, where M > 0, N > 0, where M and N are non-negative real numbers, and M ═ N; in other words, the orthographic projection area S of the first polarization region I of the polarizing plate 105 on the substrate 1011The orthographic projection area S of the second polarization region II of the polarizing plate 105 on the 101 substrate2The area of the first polarization region is equal to the area of the second polarization region, S1＝S2An overlapping area of an orthographic projection of the first color light emitting unit 10311 on the substrate 101 and an orthographic projection of the first polarization region I on the substrate 101 is S3An overlapping area of an orthographic projection of the first color light emitting unit 10311 on the substrate 101 and an orthographic projection of the second polarization region II on the substrate 101 is S4In which S is3＝S4I.e. the orthographic projection of the first color light emitting unit 10311 on the substrate 101 and the first polarization region I on the substrate 10The overlapping area of the orthographic projection of the first color light-emitting unit 10311 on the substrate 101 and the overlapping area of the orthographic projection of the second polarization region II on the substrate 101 are equal to each other, so the outgoing light of each first color light-emitting unit 10311 passing through the polarizing plate includes the outgoing light passing through the first polarization region I and the outgoing light passing through the second polarization region II, that is, the outgoing light of each first color light-emitting unit 10311 passing through the polarizing plate includes the outgoing light of the first polarization direction X and the outgoing light of the second polarization direction Y at the same time, and S3＝S4And the proportion of the emergent light of the first polarization direction X and the emergent light of the second polarization direction Y is 1:1, so that the emergent light of the organic light-emitting display panel comprises 50% of first polarized positive light (first polarization direction X emergent light) and 50% of second polarized light (second polarization direction Y emergent light), the emergent light of the organic light-emitting display panel is provided with two polarization directions which are perpendicular to each other, and the proportion of the emergent light of the first polarization direction X and the emergent light of the second polarization direction Y is 1: and 1, emergent light is further close to natural light, and user experience is improved. It should be noted that an orthographic projection of each first color light emitting unit 10311 on the substrate 101 overlaps with an orthographic projection of M first polarization regions I and N second polarization regions II of the polarizing plate 105 on the substrate 101, and is described by a projection area, that is, M ═ S3/S1，N＝S4/S2In which S is1And S3、S2And S4The area size of (a) is not limited, for example, M ═ N ═ 0.5, one light emitting unit 1031 corresponds to 0.5 first polarization regions I and 0.5 second polarization regions II, or M ═ N ═ 1.5, one light emitting unit 1031 corresponds to 1.5 first polarization regions I and 1.5 second polarization regions II, the specific size of M, N is not limited in the present invention, and the present invention is only exemplarily illustrated in the drawings, and the present invention is not limited thereto.
Optionally, the light-emitting units include a first color light-emitting unit, a second color light-emitting unit, and a third color light-emitting unit, an orthogonal projection of the first polarization region of the polarizer on the substrate at least covers an orthogonal projection of each light-emitting unit on the substrate, and an orthogonal projection of the second polarization region of the polarizer on the substrate at least covers an orthogonal projection of each light-emitting unit on the substrate.
Fig. 7 is a front view of another alternative embodiment of the organic light emitting display panel shown in fig. 2. As shown in fig. 2 and 7, the light emitting units 1031 include first, second and third color light emitting units 10311, 10312 and 10313, the orthographic projection of the first polarization region I of the polarizing plate 105 on the substrate 101 at least covers the orthographic projection of each light emitting unit 1031 on the substrate, and the orthographic projection of the second polarization region I of the polarizing plate 105 on the substrate 101 at least covers the orthographic projection of each light emitting unit 1031 on the substrate 101. In other words, the light emitting unit 1031 includes three light emitting units of different colors, each polarization region of the polarizing plate 105 corresponds to the light emitting unit 1031, that is, the orthographic projection of the light emitting unit 1031 (including three light emitting units of different colors) on the substrate 101 completely falls within the orthographic projection of each polarization region of the polarizing plate 105 on the substrate 101, and the boundary of the first polarization region I and the second polarization region II of the polarizing plate 105 is located between the respective light emitting units, that is, the boundary of the different polarization regions is located at the non-light emitting portion of the light emitting layer 103. In this embodiment, firstly, it is realized that the outgoing light of the light-emitting unit of the same color after passing through the polarizer has the first polarization direction X polarized light and the second polarization direction Y polarized light, so that the outgoing light of the organic light-emitting display panel includes 50% of the first polarized light (the first polarization direction X outgoing light) and 50% of the second polarized light (the second polarization direction Y outgoing light), so that the outgoing light of the organic light-emitting display panel has two mutually perpendicular polarization directions, and the proportion of the first polarization direction X outgoing light and the second polarization direction Y outgoing light is 1:1, further enabling emergent light to approach natural light; secondly, the junction of the first polarization region I and the second polarization region II of the polarizer 105 is located at the non-light emitting part of the light emitting layer 103, so that the light emitting influence of the light emitting unit at the junction of different polarization regions can be effectively avoided, and the light emitting efficiency of the organic light emitting display panel is improved; thirdly, each polarization region of the polarizer 105 corresponds to the light emitting unit 1031 (including three light emitting units with different colors), and the area of each polarization region can be relatively large, so that the preparation difficulty of regionalization of the polarizer is reduced, and the preparation yield of the polarizer is improved.
Furthermore, the polaroid comprises a hollow structure, and the orthographic projection of the hollow structure on the substrate is not overlapped with the orthographic projection of the light-emitting unit on the substrate.
Fig. 8 is a schematic diagram of another alternative implementation manner of an organic light emitting display panel according to an embodiment of the present invention. As shown in fig. 8, the organic light emitting display panel includes: a substrate 101; an array layer 102 located on one side of the substrate 101; a light emitting layer 103 located on a side of the array layer 102 away from the substrate 101, wherein the light emitting layer 103 includes a plurality of light emitting units 1031, and optionally, the light emitting units include a first color light emitting unit 10311, a second color light emitting unit 10312, and a third color light emitting unit 10313; alternatively, the light emitting unit 1031 may be an organic light emitting device including an anode, a display layer, and a cathode.
Optionally, the display panel further includes an encapsulation structure 104, the encapsulation structure 104 is located on a side of the light emitting layer away from the array layer 102, the encapsulation structure 104 surrounds and covers the light emitting layer 103, and the encapsulation structure 104 can isolate water and oxygen, protect the light emitting unit 1031 in the light emitting layer 103, and ensure the service life of the display panel.
The organic light-emitting display panel further includes a polarizing plate 105, the polarizing plate 105 being located on the side of the light-emitting layer 103 away from the substrate 101, wherein the polarizing plate includes a substrate 1051 and a doping material 1052; the polarizer 105 further includes a hollow structure 106, and an orthographic projection of the hollow structure on the substrate does not overlap with an orthographic projection of the light emitting unit 1031 on the substrate.
Fig. 9 is a front view of another alternative embodiment of the organic light emitting display panel shown in fig. 8. As shown in fig. 8 and 9, the polarizer 105 includes a first polarization region I and a second polarization region II, the light emitting unit 1031 includes three light emitting units with different colors, each polarization region of the polarizer 105 corresponds to the light emitting unit 1031, that is, an orthogonal projection of the light emitting unit 1031 (including the three light emitting units with different colors) on the substrate 101 completely falls into an orthogonal projection of each polarization region of the polarizer 105 on the substrate 101, the polarizer 105 further includes a hollow structure 106, and an orthogonal projection of the hollow structure 106 on the substrate does not overlap with an orthogonal projection of the light emitting unit 1031 on the substrate, that is, the hollow structure 106 corresponds to a non-light emitting portion of the light emitting layer 103. In this embodiment, firstly, it is realized that the outgoing light of the light-emitting unit of the same color after passing through the polarizer has the first polarization direction X polarized light and the second polarization direction Y polarized light, so that the outgoing light of the organic light-emitting display panel includes 50% of the first polarized light (the first polarization direction X outgoing light) and 50% of the second polarized light (the second polarization direction Y outgoing light), so that the outgoing light of the organic light-emitting display panel has two mutually perpendicular polarization directions, and the proportion of the first polarization direction X outgoing light and the second polarization direction Y outgoing light is 1:1, further enabling emergent light to approach natural light; secondly, the junction of the first polarization region I and the second polarization region II of the polarizer 105 is located at the non-light emitting part of the light emitting layer 103, so that the light emitting influence of the light emitting unit at the junction of different polarization regions can be effectively avoided, and the light emitting efficiency of the organic light emitting display panel is improved; thirdly, each polarization region of the polarizer 105 corresponds to the light emitting unit 1031 (including three light emitting units with different colors), and the area of each polarization region can be relatively large, so that the regionalized preparation difficulty of the polarizer is reduced, and the preparation yield of the polarizer is improved; fourth, polaroid 105 has hollow out construction 106, when organic light emitting display panel is flexible display panel, the hollow out construction 106 of polaroid can effectively alleviate the stress of buckling, improves display panel's resistant performance of buckling, simultaneously, like organic light emitting love you be the panel for fingerprint identification display panel when, hollow out construction 106 set up can improve the penetration rate of organic light emitting display panel fingerprint identification light, increase the light that light sense device received light, improve fingerprint identification's precision.
Optionally, the polarizer further includes a third polarization region and a fourth polarization region, the direction of the polarization axis of the third polarization region is a third polarization direction, the direction of the polarization axis of the fourth polarization region is a fourth polarization direction, and the third polarization direction is perpendicular to the fourth polarization direction; the light emitted by the light emitting units of the same color has the first polarization direction, the second polarization direction, the third polarization direction and the fourth polarization direction after passing through the polarizing plate.
Fig. 10 is a schematic diagram of still another alternative implementation of a polarizer of an organic light-emitting display panel according to an embodiment of the present invention. As shown in fig. 4, the polarizer 105 includes a first polarization region I, a second polarization region II, a third polarization region III, and a fourth polarization region IV, the polarization direction of the first polarization region I is a first polarization direction X, the polarization direction of the second polarization region II is a second polarization direction Y, the polarization direction of the third polarization region III is a third polarization direction Z, and the polarization direction of the fourth polarization region IV is a fourth polarization direction K, where the first polarization direction X is perpendicular to the second polarization direction Y, the third polarization region III is perpendicular to the fourth polarization region IV, and light emitted by light emitting units of the same color has the first polarization direction, the second polarization direction, the third polarization direction, and the fourth polarization direction after passing through the polarizer. Compared with the foregoing embodiments, the organic light emitting display panel provided in this embodiment has a plurality of polarization regions, the polarization direction of light emitted from the organic light emitting display surface through the polarizer is perpendicular to the absorption axis direction of the polarizer, the polarizer has a plurality of polarization regions, and the directional arrangement directions of the doped materials in the polarizer are different, that is, the absorption axes of the polarizers in each region are different, so that the extension performance of the polarizer can be improved from different directions, and the bending resistance of the organic light emitting display panel is further improved. For the convenience of understanding, only 4 polarization regions with different polarization directions are listed in the present embodiment, in practical applications, there may be a plurality of regions, which are not listed in this document, but these are all within the idea of the present invention.
Optionally, the display panel provided by the invention is a fully flexible display panel, the fully flexible display panel comprises the polarizer, the fully flexible display panel can meet the condition that the light emitted by the fully flexible display panel has two mutually perpendicular polarization directions, and can approximate to natural light, so that an observer can see a good display effect even when wearing polarized glasses, and on the other hand, the polarizer prepared by using an optical alignment method can reduce the thickness of the display panel and improve the bending resistance.
Fig. 11 is a schematic view of a display device according to an embodiment of the present invention. As shown in fig. 11, the display device includes an organic light emitting display panel provided in any embodiment of the present invention. The organic light emitting display panel provided by the present invention includes, but is not limited to, the following categories: the mobile terminal comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like.
As can be seen from the foregoing embodiments, the organic light emitting display panel and the display device provided by the present invention at least achieve the following beneficial effects:
the organic light emitting display panel provided by the invention comprises a substrate; the array layer is positioned on one side of the substrate; the light-emitting layer is positioned on one side, away from the substrate, of the array layer, and comprises a plurality of light-emitting units; the polaroid is positioned on one side of the light-emitting layer, which is far away from the substrate, and comprises a base material and a doping material; the polarizing plate at least comprises a first polarizing region and a second polarizing region, the arrangement direction of the doping materials in the first polarizing region is different from that of the doping materials in the second polarizing region, the polarization axis direction of the first polarizing region is a first polarizing direction, the polarization axis direction of the second polarizing region is a second polarizing direction, and the first polarizing direction is perpendicular to the second polarizing direction; the light emitted by the light emitting units of the same color at least has the first polarization direction and the second polarization direction after passing through the polarizing plate. Compared with the traditional organic light-emitting display panel, the organic light-emitting display panel provided by the invention has the advantages that the light emitting direction has two mutually perpendicular polarization directions, and can be similar to natural light, so that an observer can see a good display effect even when wearing polarized glasses.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. An organic light emitting display panel, comprising
A substrate;
the array layer is positioned on one side of the substrate;
the light-emitting layer is positioned on one side, away from the substrate, of the array layer, and comprises a plurality of light-emitting units;
the polaroid is positioned on one side of the light-emitting layer, which is far away from the substrate, and comprises a base material and a doping material;
the polarizing plate at least comprises a first polarizing region and a second polarizing region, the arrangement direction of the doping materials in the first polarizing region is different from that of the doping materials in the second polarizing region, the polarization axis direction of the first polarizing region is a first polarizing direction, the polarization axis direction of the second polarizing region is a second polarizing direction, and the first polarizing direction is perpendicular to the second polarizing direction;
the light emitted by the light emitting units of the same color at least has the first polarization direction and the second polarization direction after passing through the polaroid; the orthographic projection of each light-emitting unit on the substrate is overlapped with the orthographic projection of M first polarization areas and N second polarization areas of the polaroid on the substrate, so that the emergent light of the organic light-emitting display panel is approximate to natural light, wherein M is more than 0, N is more than 0, and M and N are non-negative real numbers;
the polaroid further comprises a hollow structure, and the orthographic projection of the hollow structure on the substrate is not overlapped with the orthographic projection of the light-emitting unit on the substrate.
2. The organic light-emitting display panel according to claim 1,
the area of the first polarization region is S1The area of the second polarization region is S2In which S is1＝S2。
3. The organic light-emitting display panel according to claim 2,
the first polarization regions and the second polarization regions are arranged at intervals along a first direction, the first polarization regions and the second polarization regions are arranged at intervals along a second direction, and the first direction is intersected with the second direction.
4. The organic light-emitting display panel according to claim 3,
the light emitting units comprise first color light emitting units, and the orthographic projection of each first color light emitting unit on the substrate is overlapped with the orthographic projection of E first polarization areas and F second polarization areas of the polaroid on the substrate, wherein E is 0, and 0 < F < 1, or 0 < E < 1, F is 0, and E and F are non-negative real numbers.
5. The organic light-emitting display panel according to claim 1,
the orthographic projection of each light-emitting unit on the substrate corresponds to the orthographic projection of M first polarization regions and N second polarization regions of the polaroid on the substrate, wherein M is equal to N.
6. The organic light-emitting display panel according to claim 2,
the light emitting units comprise a first color light emitting unit, a second color light emitting unit and a third color light emitting unit, the orthographic projection of the first polarization region of the polaroid on the substrate at least covers the orthographic projection of each light emitting unit on the substrate, and the orthographic projection of the second polarization region of the polaroid on the substrate at least covers the orthographic projection of each light emitting unit on the substrate.
7. The organic light-emitting display panel according to claim 1,
the polarizing plate further comprises a third polarizing region and a fourth polarizing region, the direction of the polarizing axis of the third polarizing region is a third polarizing direction, the direction of the polarizing axis of the fourth polarizing region is a fourth polarizing direction, and the third polarizing direction is perpendicular to the fourth polarizing direction; the light emitted by the light emitting units of the same color has the first polarization direction, the second polarization direction, the third polarization direction and the fourth polarization direction after passing through the polarizing plate.
8. The organic light-emitting display panel according to claim 1,
the doping material comprises a dichroic organic dye.
9. A display device comprising the organic light-emitting display panel according to any one of claims 1 to 8.
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| TWI739431B (en) * | 2019-12-09 | 2021-09-11 | 大陸商廣州印芯半導體技術有限公司 | Data transmission system and data transmission method thereof |
| CN113093412B (en) * | 2021-04-12 | 2023-11-03 | 武汉天马微电子有限公司 | Display panel, control method and display device |
| CN114927068B (en) * | 2022-06-30 | 2023-11-21 | 合肥维信诺科技有限公司 | Stretchable display panel, display driving method thereof and display device |
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