CN111293156B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111293156B CN111293156B CN202010113039.XA CN202010113039A CN111293156B CN 111293156 B CN111293156 B CN 111293156B CN 202010113039 A CN202010113039 A CN 202010113039A CN 111293156 B CN111293156 B CN 111293156B
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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
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
Abstract
The invention provides a display panel and a display device, and solves the problem of high production cost caused by the need of forming various masks in the requirement of diversifying the positions of optical devices due to different hole-forming positions on a strengthening layer on the back surface of a substrate in the prior art. The display panel comprises a first substrate, a second substrate and a display layer, wherein the first substrate comprises a first surface and a second surface opposite to the first surface; a display functional layer overlying the first surface; and a diamond-like film layer overlying the second surface.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the continuous development of Organic Light-Emitting Diode (OLED) display technology, OLED display panels are increasingly widely applied to various types of electronic terminal products, such as mobile phones, tablet computers, televisions, instruments and meters, and the like. Generally, in order to prevent the OLED display panel from being scratched during the manufacturing or transferring process, a layer of ink is usually coated on the non-display surface of the OLED display panel. In order to meet the actual requirements of various electronic terminal products, for example, for a mobile phone, some optical devices, such as a fingerprint identification module, are usually required to be arranged at predetermined positions, in this case, holes are usually required to be arranged at corresponding positions on a back reinforcing layer of an OLED display panel, however, due to different types, even different types of electronic terminal products of different manufacturers have different requirements for the positions of the holes, so that a plurality of mask plates are usually required to be arranged on the reinforcing layer, which leads to an increase in the production cost of the display panel.
Disclosure of Invention
In view of this, embodiments of the present invention provide a display panel and a display device, so as to solve the problem in the prior art that in order to meet the requirements of different opening positions on the strengthening layer, multiple masks need to be provided, which results in high production cost.
A first aspect of the present invention provides a display panel comprising: a first substrate including a first surface and a second surface opposite to the first surface; a display functional layer stacked on the first surface; and a diamond-like film layer overlying the second surface. According to the display panel that this embodiment provided, replace the tradition printing ink layer of strengthening layer for diamond-like carbon rete after, need not to trompil on diamond-like carbon rete, can bring the technological effect of following threedimensional like this: on the first hand, the second surface of the first substrate is comprehensively protected to avoid being scratched; in the second aspect, a plurality of mask plates are not required to be additionally arranged, so that the preparation process is simplified; compared with the ink layer, the diamond-like carbon film layer has higher hardness, and the protection strength of the display panel is improved.
In one embodiment, the diamond-like film layer comprises a first region and a second region other than the first region, the second regionThe transmittance of one region is greater than the transmittance of the second region. In this case, when the optical device is opposed to the first area S 1 When the optical device is arranged, the sensitivity of the optical device is further improved.
In one embodiment, the first region is doped with any one of elemental hydrogen, magnesium fluoride and a magnesium dioxide; and/or the second region is doped with silicon element. The transmittance of the diamond-like carbon film layer doped with hydrogen elements, magnesium fluoride or a titanium dioxide is higher than that of the undoped diamond-like carbon film layer; the diamond-like carbon film layer doped with silicon elements has higher hardness compared with the undoped diamond-like carbon film layer.
In one embodiment, the first region comprises a grating structure. According to the display panel provided by the embodiment, the light transmittance of the first region is enhanced by using the grating structure, the effect is better, and the implementation is easy.
In one embodiment, the first region includes a plurality of strip-shaped sub-regions arranged at intervals, and the plurality of strip-shaped sub-regions are doped with any one of hydrogen, magnesium fluoride, and a dioxygen. According to the display panel provided by the embodiment, the predetermined position is purposefully selected for doping, so that on one hand, the light transmittance of the first region is improved through doping; on the other hand, a grating structure is formed, and the light transmittance of the first region is further improved.
In one embodiment, the first region is located at an edge region of the diamond-like film layer. In this case, the second region surrounds or partially surrounds the perimeter of the first region to match the position of the optical device in the existing end product.
In one embodiment, the display functional layer includes a bonding area, and an orthographic projection of the diamond-like film layer on the display functional layer covers the bonding area. Because the diamond-like carbon film layer is high temperature resistant, the influence of heat generated in the bonding process of the display panel is not required to be considered. According to the display panel that this embodiment improves, cover the nation's district through setting up the orthographic projection of diamond-like carbon rete on showing the functional layer, can further improve the protection degree to display panel.
In one embodiment, the diamond-like carbon film layer has a thickness of 8-12 microns.
In one embodiment, the display device further comprises a driving functional layer located between the first substrate and the display functional layer and a second substrate located between the driving functional layer and the display functional layer, and the second substrate and the first substrate are identical in structure. According to the display panel provided by the embodiment, the light transmittance of the display panel can be further enhanced by providing the two substrates with the same structure.
A second aspect of the present invention provides a display device comprising: the display panel provided by any one of the above embodiments; and an optical device located on a side of the diamond-like film layer away from the first substrate. According to the display screen provided by the embodiment of the invention, the technical effects corresponding to those of the display panel provided by any embodiment are achieved.
According to the display panel and the display device provided by the embodiment of the invention, after the strengthening layer is arranged to be the diamond-like carbon film layer, holes do not need to be formed in the diamond-like carbon film layer, so that the step of forming a mask plate for the ink layer in the traditional strengthening layer is omitted, the transmittance of the display surface is improved, and the production cost of the display panel is reduced.
Drawings
Fig. 1 is a schematic cross-sectional view of a display panel in the prior art.
Fig. 2 is a schematic cross-sectional view of a display panel according to a first embodiment of the invention.
Fig. 3 is a schematic structural diagram of a display panel according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a display panel according to a third embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a display panel according to a fourth embodiment of the invention.
Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Fig. 1 is a schematic cross-sectional view of a display panel in the prior art. As shown in fig. 1, the display panel 10 includes a substrate 11, a display functional layer 12, and a reinforcing layer 13. Specifically, the substrate 11 includes a first surface a and a second surface B opposite to the first surface a, i.e., the first surface a and the second surface B are respectively located on two opposite sides of the substrate 11. The functional display layer 12 is superimposed on the first surface a and the strengthening layer 13, specifically an ink layer, is superimposed on the second surface B.
The display function layer 12 includes an array of light emitting cells. Specifically, the display function layer 12 includes a first electrode layer, a light emitting layer, and a second electrode layer stacked in this order on the substrate 11. The substrate 11 may be, for example, any of ultra-thin glass, a metal thin film, or an organic polymer thin film.
The strengthening layer 13 is used to provide protection for the second surface B of the substrate 11, and prevent the second surface B of the substrate 11 from being scratched during the transportation or manufacturing process of the display panel 10.
Due to the low transmittance of the strengthening layer 13, such as ink, when a mobile terminal (e.g. a mobile phone) is manufactured by using the above-mentioned display panel 10, it is often necessary to provide an opening 14 at a predetermined position of the strengthening layer 13 to prepare a corresponding optical device, such as a fingerprint recognition module, below the position of the opening 14. In this case, in the first aspect, the substrate 11 lacks protection at the position of the opening 14, and is easily scratched; in order to meet the requirements of different manufacturers for setting holes at different positions of the ink layer, multiple mask plates need to be prepared.
In view of the above technical problems, the present invention provides a display panel.
Fig. 2 is a schematic cross-sectional view of a display panel according to a first embodiment of the invention. The display panel 20 utilizes a diamond-like carbon film layer 23 to replace the ink layer in the display panel 10 shown in fig. 1. Specifically, as shown in fig. 2, the display panel 20 includes a substrate 11, a display functional layer 12, and a diamond-like film layer 23, i.e., a strengthening layer, specifically a diamond-like film layer, for increasing the substrate strength. The substrate 11 includes a first surface a and a second surface B opposite to the first surface a, i.e., the first surface a and the second surface B are respectively located at two opposite sides of the substrate 11. The display functional layer 12 is superposed on the first surface a and the diamond-like film layer 23 is superposed on the second surface B.
The Diamond Like Carbon (DLC) film 23 has physical, chemical, and mechanical properties similar to those of a Diamond film, and has high hardness, impact resistance, radiation resistance, abrasion resistance, corrosion resistance, chemical stability, and the DLC film is optically transparent to almost all bands from visible light to far infrared. Therefore, by replacing the ink layer with the diamond-like carbon film layer 23, there is no need to open a hole on the diamond-like carbon film layer 23, which can bring about the following three technical effects: on the first hand, the second surface B of the substrate 11 is protected from being scratched; in the second aspect, various mask plates are not required to be additionally arranged, so that the preparation process is simplified; in the third aspect, compared with the ink layer, the diamond-like carbon film layer 23 has higher hardness, and the protection strength of the display panel 21 is improved.
In one embodiment, the diamond-like film layer 23 has a thickness of 8 to 12 μm. Therefore, the requirement of hardness can be met, and the thickness of the display panel is not too thick.
In one embodiment, the diamond-like film layer 23 is doped to increase the hardness of the diamond-like film layer 23. For example, magnesium fluoride, elemental silicon, and carbon dioxide are doped into the diamond-like film layer 23. Thus, the protection of the diamond-like film layer 23 to the display panel can be further improved. On the premise that the hardness of the diamond-like carbon film layer 23 is fixed, the thickness of the diamond-like carbon film layer 23 can be reduced, and further the thickness of the display panel can be reduced.
In one embodiment, the display functional layer 12 includes a bonding area Q, and an orthographic projection of the diamond-like film layer 23 on the display functional layer 12 covers the bonding area Q. In the display panel 10 of the prior art shown in fig. 1, the material of the ink layer 13 is resin, and thus is not resistant to high temperature. Often produce a large amount of heats to the in-process of bonding district Q hot pressing, consequently in order to avoid the influence of the heat that bonding process produced to printing ink layer 13, set up bonding district Q in the position of keeping away from printing ink layer 13 usually, printing ink layer 13 orthographic projection on showing functional layer 12 does not cover bonding district Q promptly. According to the display panel 20 provided by this embodiment, after the ink layer 13 is replaced by the diamond-like carbon film layer 23, because the diamond-like carbon film layer 23 is high temperature resistant, there is no need to worry about the influence of heat generated in the bonding process on the diamond-like carbon film layer 23. According to the display panel provided by this embodiment, the protective strength for the display panel 10 can be further improved by setting the front projection of the diamond-like film layer 23 on the display function layer 22 to cover the bonding area Q.
The embodiment of the invention also provides another display panel.
Fig. 3 is a schematic structural diagram of a display panel according to a second embodiment of the present invention. As shown in fig. 3, the display panel 30 is different from the display panel 20 shown in fig. 2 only in that, in the display panel 30, the diamond-like film layer 23 includes a first region S 1 And except for the first region S 1 Other second region S 2 First region S 1 Has a transmittance higher than that of the second region S 2 The transmittance of (2).
First region S 1 Has a transmittance higher than that of the second region S 2 The transmittance of (A) means that light passes through the first region S 1 Less energy is lost than when the light ray passes through the second region S2. In this case, when the optical device is opposed to the first area S 1 When the optical device is arranged, the sensitivity of the optical device is further improved.
For example, the fingerprint identification module includes an optical sensor. The principle of the optical sensor for realizing fingerprint identification comprises the following steps: light emitted by the optical sensor irradiates on a finger through the display panel, if the light irradiates on a valley (a concave part between fingerprint lines), the light is reflected to the optical sensor, and at the moment, an image is white; if light irradiates the ridge, the light cannot be reflected to the optical sensor, and the image is black, so that fingerprint identification is realized. When the fingerprint identification module is aligned to the first area S 1 When the light source is arranged below the light source, the energy loss of the light emitted by the optical sensor can be further reduced, thereby improving the fingerprint identification moduleAnd (4) sensitivity.
In the present embodiment, the first region S 1 And a second region S 2 The difference in transmittance of (a) is achieved by different doping elements.
For example, the first region S 1 Doped with any one of hydrogen, magnesium fluoride and a boron oxide. With the first region S 1 The DLC film layer doped with hydrogen element has three-dimensional network structure with mixed diamond structure SP3 hybridized carbon atom and graphite structure SP2 hybridized carbon atom as main components and partial C-H bond component, and is one kind of metastable long-range disordered amorphous material. The DLC film layer containing hydrogen has a higher transmittance than the undoped DLC film layer.
Also for example, the second region S 2 Doped with silicon element. The main chemical bonds of the silicon-doped DLC film layer are carbon-carbon single bonds, carbon-carbon double bonds, silicon-carbon bonds and carbon-hydrogen bonds. The DLC film layer containing silicon element has a higher hardness than the undoped DLC film layer.
As another example, the first region S 1 Doped with hydrogen, second region S 2 Doped with silicon element.
In other embodiments, in the first region S 1 And a second area S 2 The same element is doped, and different doping percentages are controlled to form the first region S 1 And a second region S 2 Forming a difference in transmittance therebetween. For example, in the first region S 1 And a second region S 2 While doping hydrogen to control the first region S 1 The percentage of the incorporated hydrogen element is larger than the second region S 2 Percentage of incorporated hydrogen element.
In one embodiment, the first region S 1 The transmittance to the predetermined wave band is larger than that of the second region S 2 Transmittance to a predetermined wavelength band. For example, in the first region S 1 The first region S can be increased by incorporating zinc sulfide or titanium dioxide, and adding copper as an activator 1 Transmittance for blue light. For another example, in the first region S 1 The first region S can be increased by doping zinc sulfide or titanium dioxide and adding manganese as an activator 1 Transmittance for green light. For another example, in the first region S 1 The first region S can be increased by incorporating zinc sulfide or titanium dioxide, and adding silver as an activator 1 Transmittance for red light.
In one embodiment, the first region S 1 Is a rectangle of 10mm by 10 mm. This size can accommodate the opening location requirements of the actual product in the prior art. It should be understood that the first region S 1 Other shapes such as circular shapes are also possible. The application is to the first region S 1 Is not limited in shape and size.
In one embodiment, the first region S 1 Located in the edge region of the diamond-like film layer 23. In this case, the second region S 2 Surrounding or partially surrounding the first area S 1 To match the position of the optics in the existing end product.
Fig. 4 is a schematic structural diagram of a display panel according to a third embodiment of the present invention. As shown in fig. 4, the display panel 40 is different from the display panel 30 shown in fig. 3 only in the first region S 1 And a second region S 2 The transmittance difference is realized by an anti-reflection structure, wherein the anti-reflection structure refers to a structure capable of increasing light transmittance, such as a grating structure.
Specifically, as shown in fig. 4, the first region S 1 The hydrogen-doped magnesium-fluoride solar cell comprises a plurality of strip-shaped subregions N which are arranged at intervals, wherein the strip-shaped subregions N are doped with any one of hydrogen elements, magnesium fluoride and oxidation picks. In this case, the method for preparing the diamond-like film layer 23 includes: firstly, preparing a whole layer of undoped diamond-like film layer 23 on the second surface B of the substrate 11; then, in the first region S 1 Selecting a plurality of strip-shaped subregions N which are arranged at intervals, and doping hydrogen elements, magnesium fluoride or oxidation picks in the strip-shaped subregions N.
According to the display panel provided by the embodiment, the predetermined position is purposefully selected for doping, so that on one hand, the light transmittance of the first region is improved through doping; on the other hand, a grating structure is formed, and the light transmittance of the first region is further improved.
Fig. 5 is a schematic structural diagram of a display panel according to a fourth embodiment of the present invention. As shown in fig. 5, the display panel 50 further includes a driving functional layer 51 located between the substrate 11 and the display functional layer 12 on the basis of the display panel provided in any of the above embodiments.
Specifically, taking the display panel 20 shown in fig. 2 as an example, the display panel 50 includes a diamond-like film layer 23, a substrate 11, a driving functional layer 51, and a display functional layer 12, which are sequentially stacked. The driving function layer 51 includes a thin film transistor array, and specifically includes, for example: an active layer, a gate electrode, a gate insulating layer, and a source/drain layer.
In one embodiment, substrate 11 is referred to as a first substrate for ease of description. In this case, the display panel 50 further includes a second substrate 52 located between the display functional layer 12 and the drive functional layer 51. The structure of the second substrate 52 is the same as that of the first substrate.
For example, in the present embodiment, the first substrate and the second substrate 52 are both diamond-like film layers that are not doped entirely.
As another example, the first substrate includes a first region S 1 And except for the first region S 1 Other second region S 2 First region S 1 Has a transmittance higher than that of the second region S 2 The transmittance of (2). The second substrate 52 includes a third region S 3 And except for the third region S 3 A fourth region S outside 4 A third region S 3 Has a higher transmittance than the fourth region S 4 The transmittance of (2). Third region S of second substrate 52 3 Orthographic projection on a first substrate and a first area S 1 And (4) overlapping.
According to the display panel provided by the present embodiment, by providing the same structure for the two substrates (i.e., the first substrate and the second substrate 52), the light transmittance of the display panel can be further enhanced.
It should be understood that in other embodiments, the structure of the second substrate 52 may be arranged differently than the structure of the first substrate. For example, the first substrate includes a first region S 1 And except for the first region S 1 Other than the second area S 2 First region S 1 Has a higher transmittance than that of the secondRegion S 2 The transmittance of (2). The second substrate 52 is a diamond-like film layer that is not doped throughout. For another example, the first substrate is a diamond-like film layer that is not doped throughout. The second substrate 52 includes a third region S 3 And except for the third region S 3 A fourth region S outside 4 A third region S 3 Has a higher transmittance than that of the fourth region S 4 The transmittance of (2).
In one embodiment, for ease of description, the bond area Q included in the display functional layer 12 is referred to as the first bond area. As shown in fig. 5, the driving function layer 51 includes a second bonding area 510. The orthographic projection of the diamond-like film layer 23 on the driving functional layer 51 covers the second bonding area 510. Thus, the protection of the display panel is further improved.
The embodiment of the invention also provides a display screen. Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 6, the display device 60 includes the display panel 61 and the optical device 62 provided in any of the above embodiments, and the optical device 62 is located on the side of the diamond-like film layer 13 away from the substrate 11. In one embodiment, as shown in fig. 6, the diamond-like film layer 13 includes a first region S 1 And except for said first area S 1 Other second region S 2 Said first area S 1 Has a transmittance greater than that of the second region S 2 The transmittance of (2). The optical device 62 faces the first area S 1 。
The optical device 62 is a device that uses light as an input to obtain a target output, such as a fingerprint recognition module.
The display device according to the embodiment of the present invention has the technical effects corresponding to those of the display panel 61 according to any of the above embodiments, and details thereof are not repeated herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (9)
1. A display panel, comprising:
a first substrate comprising a first surface and a second surface opposite the first surface;
a display functional layer stacked on the first surface of the first substrate; and
a diamond-like film layer overlying the second surface of the first substrate; the diamond-like film layer comprises a first region and a second region except the first region, and the light transmittance of the first region is greater than that of the second region.
2. The display panel according to claim 1, wherein the first region is doped with any one of hydrogen, magnesium fluoride, and zirconium dioxide; and/or
The second region is doped with silicon element.
3. The display panel of claim 1, wherein the first region comprises a grating structure.
4. The display panel according to claim 3, wherein the first region comprises a plurality of strip-shaped sub-regions arranged at intervals, and the strip-shaped sub-regions are doped with any one of hydrogen, magnesium fluoride and zirconium dioxide.
5. The display panel of claim 1, wherein the first region is located at an edge region of the diamond-like film layer.
6. The display panel of claim 1, wherein the display function layer comprises a bonding area, and wherein an orthographic projection of the diamond-like film layer on the display function layer covers the bonding area.
7. The display panel according to claim 1, wherein the diamond-like film layer has a thickness of 8 to 12 μm.
8. The display panel according to claim 7, further comprising a driving functional layer between the first substrate and the display functional layer and a second substrate between the driving functional layer and the display functional layer, wherein the second substrate and the first substrate have the same structure.
9. A display device, comprising:
the display panel of any one of claims 1-8; and
an optical device located on a side of the diamond-like film layer away from the first substrate.
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| CN202010113039.XA CN111293156B (en) | 2020-02-24 | 2020-02-24 | Display panel and display device |
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| CN202010113039.XA CN111293156B (en) | 2020-02-24 | 2020-02-24 | Display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539051A (en) * | 2018-03-20 | 2018-09-14 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN110265584A (en) * | 2019-07-29 | 2019-09-20 | 云谷（固安）科技有限公司 | Display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539051A (en) * | 2018-03-20 | 2018-09-14 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN110265584A (en) * | 2019-07-29 | 2019-09-20 | 云谷（固安）科技有限公司 | Display panel and display device |
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