CN109659346B - OLED display panel and OLED display device - Google Patents
OLED display panel and OLED display device Download PDFInfo
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- CN109659346B CN109659346B CN201811556910.2A CN201811556910A CN109659346B CN 109659346 B CN109659346 B CN 109659346B CN 201811556910 A CN201811556910 A CN 201811556910A CN 109659346 B CN109659346 B CN 109659346B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Abstract
The application provides an OLED display panel and an OLED display device, which comprise a color film structure layer, wherein the color film structure layer comprises a plurality of color resistance units and a black array, the plurality of color resistance units comprise a first color resistance unit, a second color resistance unit and a third color resistance unit, and the colors of the first color resistance unit, the second color resistance unit and the third color resistance unit are different; the black matrix is arranged between the color resistance units; the color resistance unit comprises a light incident surface, the light incident surface is used for receiving external incident light, and the light incident surface is a concave surface. The incident surface of the color resistance unit is set to be the concave surface, so that the incident angle of external light after penetrating through the color resistance unit is increased, most of light enters the anode to be reflected and then can be absorbed by the black matrix more, and the reflectivity of the surface of the color film structure layer is reduced.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to an OLED display panel and an OLED display device.
Background
In a conventional Organic Light-emitting Diode (OLED) display panel, the polarizer can effectively reduce the reflectivity of the panel under strong Light, but loses about 58% of the Light emission. This greatly increases the lifetime burden for the OLED display panel; on the other hand, the polarizer has large thickness and brittle material, which is not beneficial to the development of dynamic bending products.
Therefore, it is desirable to provide an OLED display panel with a thin thickness, high light extraction and low reflectivity to solve the above technical problems.
Disclosure of Invention
The embodiment of the application provides an OLED display panel and an OLED display device, and aims to solve the technical problems that a polarizing plate in the existing OELD display panel is large in thickness and high in reflected light.
The embodiment of the application provides an OLED display panel, which comprises an anode, an organic light emitting layer arranged on the anode, and an encapsulation structure layer arranged on the organic light emitting layer, and further comprises a color film structure layer arranged on the encapsulation structure layer;
the color film structure layer comprises:
the color filter comprises a plurality of color resistance units, a plurality of color filter units and a plurality of color filter units, wherein the color resistance units comprise a first color resistance unit, a second color resistance unit and a third color resistance unit, and the colors of the first color resistance unit, the second color resistance unit and the third color resistance unit are different; and
a black matrix disposed between the color resistance units;
the color resistance unit comprises a light incident surface, and the light incident surface is a concave surface so that the incident angle of incident light is increased after the incident light from the outside passes through the light incident surface.
In the OLED display panel of the application, the light incident surface is a concave spherical surface.
In the OLED display panel of the present application, the first color resistance unit is a red color resistance unit, the second color resistance unit is a green color resistance unit, and the third color resistance unit is a blue color resistance unit;
the orthographic projection area of the first color resistance unit is larger than that of the second color resistance unit, and the orthographic projection area of the first color resistance unit is smaller than that of the third color resistance unit.
In the OLED display panel of the present application, the first color resistance unit, the second color resistance unit, and the third color resistance unit are all equal in height;
the concave curvature of the first color resistance unit is larger than that of the second color resistance unit, and the concave curvature of the first color resistance unit is smaller than that of the third color resistance unit.
In the OLED display panel of the present application, the encapsulation structure layer includes a first inorganic layer, an organic layer, and a second inorganic layer, the first inorganic layer is disposed on the organic light emitting layer, the organic layer is disposed on the first inorganic layer, and the second inorganic layer is disposed on the organic layer;
the first inorganic layer comprises a first inorganic sublayer and a second inorganic sublayer, the first inorganic sublayer is arranged on the organic light-emitting layer, the second inorganic sublayer is arranged on the first inorganic sublayer, and the refractive index of the first inorganic sublayer is higher than that of the second inorganic sublayer, so that the first inorganic layer forms a reflection function layer for reflecting light with a specific wavelength.
In the OLED display panel of the present application, the first inorganic sub-layer and the second inorganic sub-layer are made of materialsThe materials are all SiOxNy。
In the OLED display panel of the present application, the nitrogen content of the first inorganic sublayer is greater than the nitrogen content of the second inorganic sublayer, and the oxygen content of the first inorganic sublayer is less than the oxygen content of the second inorganic sublayer.
The application also relates to an OLED display device, which comprises an OLED display panel, wherein the OLED display panel comprises an anode, an organic light-emitting layer arranged on the anode and an encapsulation structure layer arranged on the organic light-emitting layer;
the color film structure layer comprises:
the color filter comprises a plurality of color resistance units, a plurality of color filter units and a plurality of color filter units, wherein the color resistance units comprise a first color resistance unit, a second color resistance unit and a third color resistance unit, and the colors of the first color resistance unit, the second color resistance unit and the third color resistance unit are different; and
a black matrix disposed between the color resistance units;
the color resistance unit comprises a light incident surface, the light incident surface is used for receiving external incident light, and the light incident surface is a concave surface so that the incident angle of the incident light is increased after the external incident light passes through the light incident surface.
In the OLED display device of the application, the light incident surface is a concave spherical surface.
In the OLED display device of the present application, the first color resistance unit is a red color resistance unit, the second color resistance unit is a green color resistance unit, and the third color resistance unit is a blue color resistance unit;
the orthographic projection area of the first color resistance unit is larger than that of the second color resistance unit, and the orthographic projection area of the first color resistance unit is smaller than that of the third color resistance unit.
In the OLED display device of the present application, the first color resistance unit, the second color resistance unit, and the third color resistance unit are all equal in height;
the concave curvature of the first color resistance unit is larger than that of the second color resistance unit, and the concave curvature of the first color resistance unit is smaller than that of the third color resistance unit.
In the OLED display device of the present application, the encapsulation structure layer includes a first inorganic layer, an organic layer, and a second inorganic layer, the first inorganic layer is disposed on the organic light emitting layer, the organic layer is disposed on the first inorganic layer, and the second inorganic layer is disposed on the organic layer;
the first inorganic layer comprises a first inorganic sub-layer and a second inorganic sub-layer, the refractive index of the first inorganic sub-layer is higher than that of the second inorganic sub-layer, so that the first inorganic layer forms a reflective function layer for reflecting light with a specific wavelength, and the first inorganic sub-layer and the second inorganic sub-layer are both made of SiOxNy。
In the OLED display device of the present application, the nitrogen content of the first inorganic sublayer is greater than the nitrogen content of the second inorganic sublayer, and the oxygen content of the first inorganic sublayer is less than the oxygen content of the second inorganic sublayer.
Compared with the OLED display panel and the OLED display device in the prior art, the OLED display panel has the advantages that the incident surface of the color resistance unit is arranged as the concave surface in the color film structure layer, so that the incident angle of external light after penetrating through the color resistance unit is increased, most of light enters the anode and is reflected, and then the reflected light can be absorbed by the black matrix, the reflectivity of the surface of the color film structure layer is reduced, and the contrast of the OLED display panel is improved; the technical problems that the thickness of a polarizing plate in the existing OELD display panel is large and the reflected light is high are solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a first embodiment of an OLED display panel of the present application;
fig. 2 is a schematic structural diagram of a second embodiment of an OLED display panel according to the present application.
Detailed Description
Refer to the drawings wherein like reference numbers refer to like elements throughout. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an OLED display panel according to a first embodiment of the present application. The OLED display panel 100 of the first embodiment includes an anode 11, an organic light emitting layer 12, an encapsulation structure layer 13, and a color film structure layer 14.
The organic light emitting layer 12 is disposed on the anode 11. The encapsulation structure layer 13 is disposed on the organic light emitting layer 12. The color film structure layer 14 is disposed on the package structure layer 13.
The color film structure layer 14 includes a plurality of color resistance units 141 and a black matrix 142. The plurality of color resistance units 141 include a first color resistance unit 14a, a second color resistance unit 14b, and a third color resistance unit 14 c. The first color resistance unit 14a, the second color resistance unit 14b and the third color resistance unit 14c are different in color. The black matrix 142 is disposed between the color resistance units 141.
The color resistance unit 141 includes a light incident surface 143. The light incident surface 143 is a concave surface, so that the incident angle of the incident light is increased after the incident light from the outside passes through the light incident surface.
In the OLED display panel 100 of the first embodiment, the incident surface 143 of the color resistance unit 141 is set as a concave surface in the color film structure layer 14, so as to increase an incident angle after external light penetrates through the color resistance unit, and most of the light is made to be absorbed by the black matrix 142 after entering the anode 11 and being reflected, thereby reducing the reflectivity of the surface of the color film structure layer 14 and improving the contrast of the OLED display panel 100.
Among them, the first inorganic layer 131, the organic layer 132 and the second inorganic layer 132 in the encapsulation structure layer 13. It is clear that there is reflection of light between the interfaces of the multiple film layers. In general, light distribution in a multi-layer medium has problems with reflectivity and transmission. For the package structure layer 13, the light transmittance is higher, the corresponding reflectance distribution is less, and the main light reflection is concentrated on the anode 11. Therefore, most of the reflected light absorbed by the black matrix 142 comes from the anode 12, and a small part of the reflected light comes from the packaging structure layer 13. For example, most of the external light is reflected by the anode 11 to the black matrix 142 after passing through the color resistance unit 141, so that the light is absorbed by the black matrix 142.
Since the light incident surface 143 of the color resistance unit 141 is a concave surface, the color resistance unit 141 forms a plano-concave lens structure. In the first embodiment, the incident surface 143 is a concave spherical surface. With such an arrangement, after the external incident light penetrates through the color resistance unit 141, the incident light is uniformly dispersed to the periphery of the color resistance unit 141, thereby improving the absorption balance of the black matrix 142.
In the first embodiment, the first color resistance unit 14a is a red color resistance unit. The second color resistance unit 14b is a green color resistance unit. The third color resistance unit 14c is a blue color resistance unit.
The area of the orthographic projection of the first color resist unit 14a is larger than that of the second color resist unit 14 b. The orthographic projection area of the first color resistance unit 14a is smaller than that of the third color resistance unit 14 c. With such an arrangement, the light emitting brightness of the first color resistance unit 14a, the second color resistance unit 14b and the third color resistance unit 14c tends to be balanced, and the display effect is improved.
In the first embodiment, the first color resistance unit 14a, the second color resistance unit 14b and the third color resistance unit 14c are all equal in height.
It is obvious that in the plano-concave lens, as the curvature of the concave surface increases, the deflection angle of the light is larger, so that the light is more diverged. Therefore, on the premise that the forward projection area of the first color resistance unit 14a is larger than that of the second color resistance unit 14b, and the forward projection area of the first color resistance unit 14a is smaller than that of the third color resistance unit 14 c. In order to make the light transmitted through each color resistance unit 141, the reflected light can be absorbed by the black matrix 142 as much as possible.
Therefore, in the first embodiment, the concave curvature of the first color resist unit 14a is larger than that of the second color resist unit 14 b. The concave curvature of the first color resistance unit 14a is smaller than that of the third color resistance unit 14 c. With this arrangement, the amount of reflected light absorbed by the black matrix 142 is increased.
In the present first embodiment, the encapsulation structure layer 13 includes a first inorganic layer 131, an organic layer 132, and a second inorganic layer 133. The first inorganic layer 131 is disposed on the organic light emitting layer 12. The organic layer 132 is disposed on the first inorganic layer 131. The second inorganic layer 133 is disposed on the organic layer 132.
The preparation process of the color film structure layer 14 in the first embodiment is as follows:
first, the black matrix 142 is formed on the package structure layer 13.
Then, a first color resist coating, exposure, development, imprinting transfer process and baking and shaping process are sequentially performed on the package structure layer 13, wherein the imprinting transfer process is to transfer the designed pattern template onto the surface of the first color resist unit 14a, so as to prepare the first color resist unit 14a in a concave lens shape.
Finally, the steps of forming the first color resistance unit 14a are sequentially repeated to form the second color resistance unit 14b and the third color resistance unit 14 c.
Thus, the manufacturing process of the color film structure layer 14 of the first embodiment is completed.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of an OLED display panel of the present application. In the second embodiment, the OLED display panel 200 of the second embodiment includes an anode 21, an organic light emitting layer 22, an encapsulation structure layer 23, and a color film structure layer 24. The color filter structure layer 24 includes a plurality of color resistance units 241 and a black matrix 242. The plurality of color resistance units 241 include a first color resistance unit 24a, a second color resistance unit 24b, and a third color resistance unit 24 c. The encapsulation structure layer 23 includes a first inorganic layer 231, an organic layer 232, and a second inorganic layer 233.
The second embodiment differs from the first embodiment in that: the first inorganic layer 231 includes a first inorganic sublayer 2311 and a second inorganic sublayer 2312. The first inorganic sub-layer 2311 is disposed on the organic light emitting layer 22. A second inorganic sublayer 2312 is disposed on the first inorganic sublayer 2311. The refractive index of the first inorganic sub-layer 2311 is higher than that of the second inorganic sub-layer 2312 so that the first inorganic layer 231 forms a reflective function layer for reflecting light of a specific wavelength.
Alternatively, since the area of the second color resistance unit 24b is the smallest, resulting in the largest amount of green light transmitted through the color resistance unit 241, the first inorganic layer 231 is set as a functional layer that reflects green light, so that the black matrix 242 absorbs more green light. Of course, in the present application, the wavelength reflected by the first inorganic layer 231 is not limited, and may be determined according to the actual situation, such as reflecting red light, blue light, or ultraviolet light.
In this second embodiment, the first inorganic sublayer 2311 and the second inorganic sublayer 2312 are both made of SiOxNy. The same material is used for the first inorganic sublayer 2311 and the second inorganic sublayer 2312 for the preparation of the first inorganic layer 231, improving efficiency.
In addition, the nitrogen content of the first inorganic sublayer 2311 is greater than the nitrogen content of the second inorganic sublayer 2312. The oxygen content of the first inorganic sublayer 2311 is less than the oxygen content of the second inorganic sublayer 2312. In the material of SiOxNyIn the first and second inorganic sub-layers 2311 and 2312, when N (nitrogen) content is high, SiO is presentxNyThe water and oxygen barrier properties are good, so the first inorganic sublayer 2311 abuts the organic light emitting layer 22; when the content of O (oxygen) is high, SiOxNyHas good organic/inorganic adhesion and is easily adhered to the organic layer 232, so that the second inorganic sublayer 2312 is disposed on the side next to the organic layer 232.
The manufacturing process of the color film structure layer 24 in the second embodiment is the same as that of the color film structure layer in the first embodiment, and please refer to the content of the first embodiment.
The application also relates to an OLED display device, which comprises an OLED display panel, wherein the OLED display panel comprises an anode, an organic light-emitting layer arranged on the anode and an encapsulation structure layer arranged on the organic light-emitting layer;
the color film structure layer comprises:
the color filter comprises a plurality of color resistance units, a plurality of color filter units and a plurality of color filter units, wherein the color resistance units comprise a first color resistance unit, a second color resistance unit and a third color resistance unit, and the colors of the first color resistance unit, the second color resistance unit and the third color resistance unit are different; and
a black matrix disposed between the color resistance units;
the color resistance unit comprises a light incident surface, the light incident surface is used for receiving external incident light, and the light incident surface is a concave surface so that the incident angle of the incident light is increased after the external incident light passes through the light incident surface.
In the OLED display device of the application, the light incident surface is a concave spherical surface.
In the OLED display device of the present application, the first color resistance unit is a red color resistance unit, the second color resistance unit is a green color resistance unit, and the third color resistance unit is a blue color resistance unit;
the orthographic projection area of the first color resistance unit is larger than that of the second color resistance unit, and the orthographic projection area of the first color resistance unit is smaller than that of the third color resistance unit.
In the OLED display device of the present application, the first color resistance unit, the second color resistance unit, and the third color resistance unit are all equal in height;
the concave curvature of the first color resistance unit is larger than that of the second color resistance unit, and the concave curvature of the first color resistance unit is smaller than that of the third color resistance unit.
In the OLED display device of the present application, the encapsulation structure layer includes a first inorganic layer, an organic layer, and a second inorganic layer, the first inorganic layer is disposed on the organic light emitting layer, the organic layer is disposed on the first inorganic layer, and the second inorganic layer is disposed on the organic layer;
the first inorganic layer comprises a first inorganic sub-layer and a second inorganic sub-layer, the refractive index of the first inorganic sub-layer is higher than that of the second inorganic sub-layer, so that the first inorganic layer forms a reflection function layer for reflecting light with a specific wavelength, and the first inorganic layer forms a reflection function layer for reflecting light with a specific wavelengthThe material of the sublayer and the second inorganic sublayer is SiOxNy。
In the OLED display device of the present application, the nitrogen content of the first inorganic sublayer is greater than the nitrogen content of the second inorganic sublayer, and the oxygen content of the first inorganic sublayer is less than the oxygen content of the second inorganic sublayer.
Compared with the OLED display panel and the OLED display device in the prior art, the OLED display panel has the advantages that the incident surface of the color resistance unit is arranged as the concave surface in the color film structure layer, so that the incident angle of external light after penetrating through the color resistance unit is increased, most of light enters the anode and is reflected, and then the reflected light can be absorbed by the black matrix, the reflectivity of the surface of the color film structure layer is reduced, and the contrast of the OLED display panel is improved; the technical problems that the thickness of a polarizing plate in the existing OELD display panel is large and the reflected light is high are solved.
As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.
Claims (10)
1. An OLED display panel comprises an anode, an organic light emitting layer arranged on the anode and an encapsulation structure layer arranged on the organic light emitting layer, and is characterized by further comprising a color film structure layer arranged on the encapsulation structure layer;
the color film structure layer comprises:
the color filter comprises a plurality of color resistance units, a plurality of color filter units and a plurality of color filter units, wherein the color resistance units comprise a first color resistance unit, a second color resistance unit and a third color resistance unit, and the colors of the first color resistance unit, the second color resistance unit and the third color resistance unit are different; and
a black matrix disposed between the color resistance units;
the color resistance unit comprises a light incident surface, and the light incident surface is a concave surface so that the incident angle of incident light is increased after the incident light from the outside penetrates through the light incident surface;
the first color resistance unit is a red color resistance unit, and the third color resistance unit is a blue color resistance unit; the orthographic projection area of the first color resistance unit is smaller than that of the third color resistance unit, and the concave curvature of the first color resistance unit is smaller than that of the third color resistance unit.
2. The OLED display panel of claim 1, wherein the light incident surface is a concave spherical surface.
3. The OLED display panel of claim 1, wherein the second color resistance unit is a green color resistance unit;
the orthographic projection area of the first color resistance unit is larger than that of the second color resistance unit.
4. The OLED display panel of claim 3, wherein the first color-resisting unit has a concave curvature larger than that of the second color-resisting unit.
5. The OLED display panel of claim 1, wherein the encapsulating structure layer comprises a first inorganic layer disposed on the organic light emitting layer, an organic layer disposed on the first inorganic layer, and a second inorganic layer disposed on the organic layer;
the first inorganic layer comprises a first inorganic sublayer and a second inorganic sublayer, the first inorganic sublayer is arranged on the organic light-emitting layer, the second inorganic sublayer is arranged on the first inorganic sublayer, and the refractive index of the first inorganic sublayer is higher than that of the second inorganic sublayer, so that the first inorganic layer forms a reflection function layer for reflecting light with a specific wavelength.
6. The OLED display panel of claim 5, wherein the first inorganic sub-layer and the second inorganic sub-layerThe inorganic sub-layers are made of SiOxNy。
7. The OLED display panel of claim 6, wherein the first inorganic sub-layer has a nitrogen content greater than the nitrogen content of the second inorganic sub-layer, and wherein the first inorganic sub-layer has an oxygen content less than the oxygen content of the second inorganic sub-layer.
8. An OLED display device comprises an OLED display panel, wherein the OLED display panel comprises an anode, an organic light emitting layer arranged on the anode and an encapsulation structure layer arranged on the organic light emitting layer;
the color film structure layer comprises:
the color filter comprises a plurality of color resistance units, a plurality of color filter units and a plurality of color filter units, wherein the color resistance units comprise a first color resistance unit, a second color resistance unit and a third color resistance unit, and the colors of the first color resistance unit, the second color resistance unit and the third color resistance unit are different; and
a black matrix disposed between the color resistance units;
the color resistance unit comprises a light incident surface, the light incident surface is used for receiving external incident light, and the light incident surface is a concave surface so that the incident angle of the incident light is increased after the external incident light passes through the light incident surface;
the first color resistance unit is a red color resistance unit, and the third color resistance unit is a blue color resistance unit; the orthographic projection area of the first color resistance unit is smaller than that of the third color resistance unit, and the concave curvature of the first color resistance unit is smaller than that of the third color resistance unit.
9. The OLED display device of claim 8, wherein the encapsulation structure layer includes a first inorganic layer disposed on the organic light emitting layer, an organic layer disposed on the first inorganic layer, and a second inorganic layer disposed on the organic layer;
the first inorganic layer comprises a first inorganic sub-layer and a second inorganic sub-layer, the refractive index of the first inorganic sub-layer is higher than that of the second inorganic sub-layer, so that the first inorganic layer forms a reflective function layer for reflecting light with a specific wavelength, and the first inorganic sub-layer and the second inorganic sub-layer are both made of SiOxNy。
10. The OLED display device of claim 9, wherein the first inorganic sublayer has a nitrogen content greater than the nitrogen content of the second inorganic sublayer, and wherein the first inorganic sublayer has an oxygen content less than the oxygen content of the second inorganic sublayer.
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| CN110350015B (en) * | 2019-07-22 | 2022-05-24 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
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| CN110764169A (en) | 2019-11-06 | 2020-02-07 | 京东方科技集团股份有限公司 | Lens structure, preparation method and display device |
| CN110993824A (en) * | 2019-12-19 | 2020-04-10 | 京东方科技集团股份有限公司 | OLED display screen, preparation method thereof and display device |
| US20220140287A1 (en) * | 2020-03-27 | 2022-05-05 | Boe Technology Group Co., Ltd. | Display Substrate and Manufacturing Method thereof, and Display Apparatus |
| CN111554731B (en) * | 2020-06-15 | 2022-06-03 | 京东方科技集团股份有限公司 | OLED display panel preparation method, display panel and display device |
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| CN107393944A (en) * | 2017-07-12 | 2017-11-24 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method |
| CN108010948A (en) * | 2017-11-30 | 2018-05-08 | 武汉天马微电子有限公司 | Flexible display panels and its control method and display device |
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