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CN109785756B - Display panel and display device - Google Patents

Display panel and display device
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Publication number
CN109785756B
CN109785756BCN201910198393.4ACN201910198393ACN109785756BCN 109785756 BCN109785756 BCN 109785756BCN 201910198393 ACN201910198393 ACN 201910198393ACN 109785756 BCN109785756 BCN 109785756B
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Prior art keywords
light
light shielding
display panel
layer
array substrate
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CN201910198393.4A
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CN109785756A (en
Inventor
朱正勇
赵欣
宋会会
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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Abstract

The invention provides a display panel and a display device, the display panel includes: the array substrate comprises a fingerprint identification module, an array substrate and a shading layer; the light shielding layer is arranged between the fingerprint identification module and the array substrate; the shading layer is provided with a light hole corresponding to the fingerprint identification module; the light shielding layer comprises at least two light shielding plates which are arranged in a stacked mode, each light shielding plate is provided with an opening, and orthographic projection parts of the openings on the array substrate are overlapped to form a light hole; because the orthographic projections of the openings on the array substrate are partially overlapped, the area of each opening is larger than that of the light hole, and compared with the light shielding layer which is only provided with one light shielding plate, the area of the hole on the single-layer light shielding plate is increased, so that the area of the light shielding plate is reduced; when display panel received to press, can pass through open-ended deformation absorption stress behind the light screen atress, and then avoid stress to be difficult to release and lead to display panel to warp, improved display panel's product quality.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of display equipment, in particular to a display panel and a display device.
Background
With the gradual development of display device technology, display panels with fingerprint identification function become a hot point of research.
In the prior art, a fingerprint module is usually disposed on the back of the display panel, so that when a user presses a finger close to the front of the display panel, the fingerprint identification module detects light from the finger to realize fingerprint identification. Wherein, the display panel includes: the fingerprint identification module, the light emitting layer, the array substrate and the light shielding layer are arranged in a stacked mode; the array substrate is arranged between the light shielding layer and the light emitting layer, the fingerprint module is arranged on one side of the light shielding layer, which is far away from the array substrate, the light shielding layer is made of metal, and the light shielding layer is provided with a light hole which is opposite to the fingerprint identification module; when a user brings a finger close to the light emitting layer, light from the finger of the user passes through the light emitting layer, the array substrate and the light holes and emits to the fingerprint identification module, so that fingerprint identification is realized.
However, since the area of the light-transmitting hole is small and the area of the light-shielding layer made of metal is large, when the display panel is pressed, the light-shielding layer is hard to release due to stress applied thereto, and the display panel is likely to be deformed.
Disclosure of Invention
In view of this, embodiments of the present invention provide a display panel and a display device to solve the technical problems that the area of a light hole is small, the area of a light shielding layer made of metal is large, and when a display panel is pressed, the light shielding layer is difficult to release due to stress, and the display panel is easily deformed.
An embodiment of the present invention provides a display panel, including: the array substrate comprises a fingerprint identification module, an array substrate and a shading layer; the light shielding layer is arranged between the fingerprint identification module and the array substrate;
the shading layer is provided with a light hole corresponding to the fingerprint identification module; the light shielding layer comprises at least two light shielding plates which are arranged in a stacked mode, each light shielding plate is provided with an opening, and orthographic projection parts of the openings on the array substrate are overlapped to form the light transmitting holes.
The display panel as described above, preferably, the light shielding plates include a first light shielding plate and a second light shielding plate, the first light shielding plate is provided with a first opening, the second light shielding plate is provided with a second opening, and the first opening overlaps with an orthographic projection portion of at least one of the second openings on the array substrate.
As described above, preferably, the light shielding plates include a first light shielding plate, a second light shielding plate and a third light shielding plate, the first light shielding plate is provided with a first opening, the second light shielding plate is provided with a second opening, and the third light shielding plate is provided with a third opening; the orthographic projection of the first opening on the array substrate is at least partially overlapped with the orthographic projection of the second opening on the array substrate, and the overlapped orthographic projection is partially overlapped with the orthographic projection of the third opening on the array substrate.
In the display panel, preferably, the light-transmitting holes are provided in plural numbers, and the plural light-transmitting holes are arranged at intervals.
As above, preferably, each of the light-transmitting holes is disposed in a fingerprint identification area of the display panel.
As described above, preferably, the display panel further includes a transparent conductive layer disposed between the active layer of the array substrate and the light-shielding layer.
In the display panel as described above, preferably, a transparent insulating layer is disposed between the transparent conductive layer and the active layer.
As above, preferably, the array substrate includes a substrate located on a side of the active layer facing the fingerprint identification module, and the transparent conductive layer is disposed between the substrate and the light shielding layer.
In the display panel, the transparent conductive layer is preferably an ito layer.
The embodiment of the invention also provides a display device which comprises the display panel.
According to the display panel and the display device provided by the embodiment of the invention, the light shielding layer is arranged between the fingerprint identification module and the array substrate, and the light transmitting holes corresponding to the fingerprint identification module are formed in the light shielding layer; the light shielding layer comprises at least two light shielding plates which are arranged in a stacked mode, each light shielding plate is provided with an opening, and orthographic projection parts of the openings on the array substrate are overlapped to form a light hole; because the orthographic projections of the openings on the array substrate are partially overlapped, the area of each opening is larger than that of the light hole, and compared with the light shielding layer which is only provided with one light shielding plate, the area of the hole on the single-layer light shielding plate is increased, so that the area of the light shielding plate is reduced; when display panel received to press, can pass through open-ended deformation absorption stress behind the light screen atress, and then avoid stress to be difficult to release and lead to display panel to warp, improved display panel's product quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel having two light shielding plates according to an embodiment of the present invention;
FIG. 2 is a first top view of a light-shielding layer in a display panel according to an embodiment of the present invention;
FIG. 3 is a second top view of a light-shielding layer in the display panel according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a display panel having three light-shielding plates according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display panel having a transparent conductive layer according to an embodiment of the invention.
Description of reference numerals:
10. an array substrate;
101. an active layer;
102. a substrate base plate;
103. a transparent insulating layer;
20. a light-shielding layer;
201. a first light shielding plate;
202. a second light shielding plate;
203. a third light shielding plate;
2011. a first opening;
2021. a second opening;
2031. a third opening;
30. a light-transmitting hole;
40. a transparent conductive layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a display panel having two light shielding plates according to an embodiment of the present invention;
FIG. 2 is a first top view of a light-shielding layer in a display panel according to an embodiment of the present invention;
FIG. 3 is a second top view of a light-shielding layer in the display panel according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a display panel having three light-shielding plates according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display panel having a transparent conductive layer according to an embodiment of the invention.
Please refer to fig. 1-5. The present embodiment provides a display panel including: the fingerprint identification module, thearray substrate 10 and thelight shielding layer 20; thelight shielding layer 20 is arranged between the fingerprint identification module and thearray substrate 10; thelight shielding layer 20 is provided with alight hole 30 corresponding to the fingerprint identification module; thelight shielding layer 20 includes at least two light shielding plates stacked one on another, each light shielding plate is provided with an opening, and orthographic projections of the openings on thearray substrate 10 are partially overlapped to form alight transmitting hole 30.
The display panel provided by the embodiment further comprises a plurality of light emitting units arranged on one side of thearray substrate 10, which is far away from the fingerprint identification module, a pixel limiting layer used for separating the light emitting units, and a first electrode arranged on one side of the pixel limiting layer, which is far away from thearray substrate 10; wherein the light emitting unit may be an organic light emitting unit; a second electrode is arranged on one side of thearray substrate 10, which is far away from theshading layer 20, the second electrode corresponds to the light-emitting unit, and a thin film transistor electrically connected with the second electrode is arranged in thearray substrate 10; when the display panel is used, the thin film transistor controls the second electrode connected with the thin film transistor to be electrified, so that the light-emitting unit emits light, and display of the display panel is realized.
In this embodiment, thelight shielding layer 20 is disposed between thearray substrate 10 and the fingerprint identification module, and thelight shielding layer 20 is provided with alight hole 30 penetrating through thelight shielding layer 20, and thelight hole 30 is disposed opposite to the fingerprint identification module; when fingerprint identification is carried out, a finger of a user is close to the display panel, light emitted by the light-emitting unit is irradiated on the finger of the user, reflected light is formed on the finger of the user, and the reflected light carries fingerprint information of the finger of the user; the reflected light is emitted to the display panel, passes through the first electrode, the pixel limiting layer and thearray substrate 10 and then is emitted to the fingerprint identification module along thelight hole 30, and the fingerprint identification module receives the reflected light to realize fingerprint identification.
It should be noted that, in order to avoid the light emitting units blocking the reflected light carrying the fingerprint information from passing through the pixel defining layer, the orthographic projection of the light transmission holes 30 on thearray substrate 10 may not coincide with the orthographic projection of the light emitting units on thearray substrate 10.
In this embodiment, thelight shielding layer 20 includes at least two light shielding plates stacked together, each light shielding plate is provided with an opening, and orthographic projections of the openings on thearray substrate 10 are only partially overlapped to form thelight transmitting hole 30. Specifically, the number of light shielding plates constituting thelight shielding layer 20 is not limited in the present embodiment, and for example: the number of the light shielding plates can be two, three, four and the like; in order to separate two adjacent light shielding plates, a transparent layer can be arranged between the two adjacent light shielding plates, the transparent layer can be an optical glue layer or a polyimide layer, and the transparent layer can also be other transparent film layers.
In this embodiment, thelight shielding layer 20 includes at least two light shielding plates, each of which has an opening, and the orthographic projections of the openings on thearray substrate 10 are partially overlapped to form thelight hole 30; because the orthographic projections of the openings on thearray substrate 10 are partially overlapped, the area of each opening is larger than that of the light-transmittinghole 30; compared with theshading layer 20 which only has one shading plate, the area of the hole on the shading plate is increased, so that the area of the shading plate is reduced; when the display panel is pressed, stress can be absorbed through the deformation of the opening after the shading plate is stressed, and then the phenomenon that the display panel is deformed due to the fact that the stress is difficult to release is avoided. In addition, when the display panel is manufactured, other film layers are required to be formed on thelight shielding layer 20 in a steaming and plating mode after thelight shielding layer 20 is formed, the light shielding plate is heated and expands during steaming and plating, and deformation caused by heating can be released through deformation of the opening due to the fact that the opening in the light shielding plate is large, so that the light shielding plate is prevented from being deformed after being heated, and the thickness of the steaming and plating is prevented from being uneven.
In this embodiment, the material of the light shielding plate is not limited, for example: the shading plate can be a non-transparent plate such as a copper plate, an aluminum plate and the like. Preferably, the area of the opening of each light shielding plate can be increased as much as possible to further reduce the area of each light shielding plate on the premise of ensuring that light can only pass through thelight shielding layer 20 through the light holes 30 of thelight shielding layer 20.
In one implementable manner, thelight shielding layer 20 includes two light shielding plates disposed in a stack; specifically, the light shielding plates include a firstlight shielding plate 201 and a secondlight shielding plate 202, afirst opening 2011 is disposed on the firstlight shielding plate 201, asecond opening 2021 is disposed on the secondlight shielding plate 202, and thefirst opening 2011 overlaps with an orthographic projection portion of at least onesecond opening 2021 on thearray substrate 10. Thefirst opening 2011 and thesecond opening 2021 corresponding to the overlapped orthographic projections form alight transmission hole 30, so that the area of thelight transmission hole 30 is smaller than the areas of thefirst opening 2011 and thesecond opening 2021, and thefirst opening 2011 and thesecond opening 2021 can be made larger; the areas of the firstlight shielding plate 201 and the secondlight shielding plate 202 are reduced compared to when thelight shielding layer 20 has only one light shielding plate.
Specifically, the shape of thefirst opening 2011 in the present embodiment may be various, for example: thefirst opening 2011 may have a regular shape such as a rectangle, a triangle, or other irregular shape. Similarly, the shape of thesecond opening 2021 may be varied, as long as the orthographic projections of thefirst opening 2011 and thesecond opening 2021 on thearray substrate 10 are partially overlapped to form the light-transmittinghole 30; for example: thesecond opening 2021 may have a regular shape such as a rectangle, a triangle, or other irregular shape of thesecond opening 2021. It should be noted that the shape of thefirst opening 2011 and the shape of thesecond opening 2021 may be the same, or the shape of thefirst opening 2011 and the shape of thesecond opening 2021 may be different.
With continued reference to fig. 2, afirst opening 2011 of thefirst shutter plate 201 and asecond opening 2021 of thesecond shutter plate 202 illustratively form a light-transmittingaperture 30.
With continued reference to fig. 3, thefirst opening 2011 of the firstlight shielding plate 201 and thesecond openings 2021 of the secondlight shielding plate 202 illustratively form a plurality of light-transmittingholes 30. For convenience of description, thefirst opening 2011 and thesecond opening 2021 are rectangular, and at this time, four corners of thefirst opening 2011 correspond to onesecond opening 2021 respectively, and form four light-transmittingholes 30. Of course, onefirst opening 2011 may also correspond to twosecond openings 2021 to form two light-transmittingholes 30; or thefirst opening 2011 corresponds to the threesecond openings 2021 to form three light-transmittingholes 30.
Continuing to refer to fig. 3, when fingerprint identification is performed, a user finger is close to the display panel, light emitted by the light-emitting unit is irradiated on the user finger, and reflected light is formed on the user finger, and the reflected light carries fingerprint information of the user finger; the reflected light beam is emitted to the display panel, and passes through the first electrode, the pixel defining layer and thearray substrate 10 to enter thefirst opening 2011 of the firstlight shielding plate 201, and then passes through the secondlight shielding plate 202 through the overlapping position of thesecond opening 2021 and thefirst opening 2011, that is, the reflected light beam passes through thelight transmitting hole 30 and is emitted to the fingerprint identification module, and the fingerprint identification module receives the reflected light beam to realize fingerprint identification.
With continued reference to fig. 4, in other implementations, there may be three light-shielding plates that constitute the light-shielding layer 20; specifically, the light shielding plates include a firstlight shielding plate 201, a secondlight shielding plate 202 and a thirdlight shielding plate 203, afirst opening 2011 is arranged on the firstlight shielding plate 201, asecond opening 2021 is arranged on the secondlight shielding plate 202, and athird opening 2031 is arranged on the thirdlight shielding plate 203; an orthogonal projection of thefirst opening 2011 on thearray substrate 10 at least partially overlaps an orthogonal projection of thesecond opening 2021 on thearray substrate 10, and the overlapping orthogonal projection partially overlaps an orthogonal projection of thethird opening 2031 on thearray substrate 10. The area of each light shielding plate can be further reduced as compared with having two light shielding plates.
Taking the orientation shown in fig. 4 as an example, thelight shielding layer 20 is disposed at the lower portion of thearray substrate 10, and the firstlight shielding plate 201, the secondlight shielding plate 202, and the thirdlight shielding plate 203 are sequentially disposed from top to bottom, thefirst opening 2011 on the firstlight shielding plate 201 at least partially overlaps thesecond opening 2021 on the secondlight shielding plate 202, and the overlapping region partially overlaps the thirdlight shielding plate 203 to form thelight hole 30. Of course, the arrangement order of the firstlight shielding plate 201, the secondlight shielding plate 202 and the thirdlight shielding plate 203 in this embodiment may be various, for example: the firstlight shielding plate 201, the thirdlight shielding plate 203 and the secondlight shielding plate 202 are sequentially arranged from thearray substrate 10 to the fingerprint identification module, or the secondlight shielding plate 202, the thirdlight shielding plate 203 and the firstlight shielding plate 201 are sequentially arranged from thearray substrate 10 to the fingerprint identification module.
Continuing to refer to fig. 4, when fingerprint identification is performed, a user finger is close to the display panel, light emitted by the light-emitting unit is irradiated on the user finger, and reflected light is formed on the user finger, and the reflected light carries fingerprint information of the user finger; the reflected light beam is emitted to the display panel, and passes through the first electrode, the pixel defining layer and thearray substrate 10 to enter thefirst opening 2011 of the firstlight shielding plate 201, then passes through the secondlight shielding plate 202 at the overlapping position of thesecond opening 2021 and thefirst opening 2011, and then passes through the thirdlight shielding plate 203 at the overlapping position of thethird opening 2031 and thesecond opening 2021, that is, the reflected light beam passes through thelight transmitting hole 30 and is emitted to the fingerprint identification module, and the fingerprint identification module receives the reflected light beam to realize fingerprint identification.
In the display panel provided by this embodiment, thelight shielding layer 20 is disposed between the fingerprint identification module and thearray substrate 10, and thelight shielding layer 20 is provided with the light holes 30 corresponding to the fingerprint identification module; the light-transmittinghole 30 is formed by making the light-shielding layer 20 include at least two light-shielding plates which are arranged in a stacked manner, and each light-shielding plate is provided with an opening, and orthographic projections of the openings on thearray substrate 10 are partially overlapped; because the orthographic projections of the openings on thearray substrate 10 are partially overlapped, the area of each opening is larger than that of thelight hole 30, compared with the case that thelight shielding layer 20 is only provided with one light shielding plate, the area of the hole on the single light shielding plate is increased, and the area of the light shielding plate is reduced; when display panel received to press, can pass through open-ended deformation absorption stress behind the light screen atress, and then avoid stress to be difficult to release and lead to display panel to warp, improved display panel's product quality.
With continued reference to fig. 1-4, in the display panel provided in this embodiment, the light-transmittingholes 30 are multiple, and the multiple light-transmittingholes 30 are arranged at intervals. The reflection ray that carries fingerprint information can be through a plurality oflight trap 30 simultaneous directive fingerprint identification module, and then has improved the fingerprint identification effect.
Specifically, the plurality of light-transmittingholes 30 may be arranged regularly, for example: the plurality oflight holes 30 are arranged in an array; of course, the plurality oflight holes 30 may be arranged randomly.
In this embodiment, the display panel has an identification area for fingerprint identification, and each light-transmittinghole 30 is provided in the fingerprint identification area of the display panel.
Specifically, the area of the fingerprint identification area may be smaller than the area of the display panel, that is, fingerprint identification is performed on a partial area of the display panel; or the area of the fingerprint identification area is equal to the area of the display panel, namely the fingerprint identification area is superposed with the display area of the display panel, and fingerprint identification can be carried out on the whole display panel.
With continued reference to fig. 5, the display panel in the present embodiment further includes a transparentconductive layer 40, and the transparentconductive layer 40 is disposed between theactive layer 101 of thearray substrate 10 and thelight shielding layer 20. The opening on the light shielding plate may cause the conductive layer on the lower portion of thearray substrate 10 to be uneven, and the current and voltage of thearray substrate 10 are uneven, so that the brightness of the display panel is uneven. The transparentconductive layer 40 can form a uniform conductive layer between thearray substrate 10 and thelight shielding layer 20, so that the uniformity of current and voltage of thearray substrate 10 is improved, the brightness of the display panel is uniform, and the display effect is improved.
In this embodiment, the material of the transparentconductive layer 40 is not limited, for example: the transparentconductive layer 40 can be an indium tin oxide layer, and the transparentconductive layer 40 made of indium tin oxide has good transparency so as to avoid affecting light transmission; of course, the transparentconductive layer 40 may be made of other transparent and conductive materials.
The transparentconductive layer 40 is located between theactive layer 101 of thearray substrate 10 and thelight shielding layer 20 in this embodiment, and in an implementation manner, the transparentconductive layer 40 may be located between thearray substrate 10 and thelight shielding layer 20. Specifically, thearray substrate 10 includes asubstrate 102 on a side of theactive layer 101 facing the fingerprint recognition module, and the transparentconductive layer 40 is disposed between thesubstrate 102 and thelight shielding layer 20. That is, the transparentconductive layer 40 is located outside thearray substrate 10, and in this case, thearray substrate 10, the transparentconductive layer 40, and the light-shielding layer 20 may be separately manufactured and then bonded to each other, thereby facilitating the manufacture of the display panel.
In other embodiments, the transparentconductive layer 40 may be disposed inside thearray substrate 10. Specifically, thearray substrate 10 includes anunderlying substrate 102 disposed toward the light-shielding layer 20, and the transparentconductive layer 40 may be disposed inside theunderlying substrate 102; or the transparentconductive layer 40 is disposed between thebase substrate 102 and theactive layer 101. When the transparentconductive layer 40 is located between thebase substrate 102 and theactive layer 101, the transparentconductive layer 40 may be disposed adjacent to the active layer, with the transparent insulatinglayer 103 disposed between the transparentconductive layer 40 and theactive layer 101. The transparentinsulating layer 103 may realize an insulating connection between the transparentconductive layer 40 and theactive layer 101 so as not to influence the operation of theactive layer 101 by the transparentconductive layer 40. Of course, other film layers of thearray substrate 10 may also be disposed between the transparentconductive layer 40 and theactive layer 101, which is not limited in this embodiment.
Continuing with fig. 1-5. In other embodiments, there is also provided a display device including the display panel as described above.
The display device in this embodiment may be a product or a component having a display function, such as a mobile phone, a tablet computer, a television, a display, an electronic book, electronic paper, a smart watch, a notebook computer, a digital photo frame, or a navigator.
In the display device provided by this embodiment, thelight shielding layer 20 is disposed between the fingerprint identification module and thearray substrate 10, and thelight shielding layer 20 is provided with the light holes 30 corresponding to the fingerprint identification module; the light-transmittinghole 30 is formed by making the light-shielding layer 20 include at least two light-shielding plates which are stacked, and each light-shielding plate is provided with an opening, and the orthographic projection parts of the openings on thearray substrate 10 are overlapped; because the orthographic projections of the openings on thearray substrate 10 are partially overlapped, the area of each opening is larger than that of thelight hole 30, compared with the case that thelight shielding layer 20 is only provided with one light shielding plate, the area of the hole on the single light shielding plate is increased, and the area of the light shielding plate is reduced; when the display panel is pressed, stress can be absorbed through open-ended deformation after the light screen is stressed, so that the phenomenon that the display panel is deformed due to the fact that the stress is difficult to release is avoided, and the product quality of the display panel is improved
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

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CN201910198393.4A2019-03-152019-03-15Display panel and display deviceActiveCN109785756B (en)

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