CN110767818A - OLED screen, manufacturing method thereof and electronic device - Google Patents
OLED screen, manufacturing method thereof and electronic device Download PDFInfo
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- CN110767818A CN110767818A CN201810836586.3A CN201810836586A CN110767818A CN 110767818 A CN110767818 A CN 110767818A CN 201810836586 A CN201810836586 A CN 201810836586A CN 110767818 A CN110767818 A CN 110767818A
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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
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The application relates to an OLED screen and a manufacturing method and an electronic device thereof, wherein the OLED screen comprises a cover plate, a base plate and an organic light emitting diode, the cover plate and the base plate are arranged oppositely, the organic light emitting diode is positioned between the cover plate and the base plate, the edge of the cover plate and the edge of the base plate are bonded through a sealant, a liquid reinforcing layer is filled in the area surrounded by the cover plate, the base plate and the sealant, and the reinforcing layer respectively adsorbs the cover plate and the base plate. Set up liquid enhancement layer in the above-mentioned OLED screen, adsorb apron and base plate and become a whole, and when the OLED screen received the impact, apron, base plate and enhancement layer were as a whole, and shock resistance is strong, and the enhancement layer is liquid, has the ability that the buffering was strikeed to guarantee that the OLED screen does not receive the damage.
Description
Technical Field
The present disclosure relates to the field of electronic devices, and more particularly, to an OLED screen, a method for manufacturing the OLED screen, and an electronic device.
Background
Most of the substrate glass and the cover plate glass of the conventional OLED screen are packaged and connected together in a peripheral sealing manner, and when external impact is applied, the substrate glass and the cover plate glass of the whole OLED screen are easily separated or broken to lose efficacy.
Disclosure of Invention
An embodiment of the present application provides an OLED screen, an electronic device, and a method for manufacturing the OLED screen to solve the above technical problems.
The utility model provides a OLED screen, includes apron, base plate and the organic light emitting diode who is located between apron and the base plate that sets up relatively, bond through sealed glue between the edge of apron and the edge of base plate, be full of liquid enhancement layer in the region that apron, base plate and sealed glue enclose and establish, the enhancement layer adsorbs apron and base plate respectively.
Set up liquid enhancement layer in the above-mentioned OLED screen, adsorb apron and base plate and become a whole, and when the OLED screen received the impact, apron, base plate and enhancement layer were as a whole, and shock resistance is strong, and the enhancement layer is liquid, has the ability that the buffering was strikeed to guarantee that the OLED screen does not receive the damage.
In one embodiment, the reinforcing layer is a transparent hydrophobic or hydrophilic liquid which does not react with the cover plate, the substrate, the sealant and the organic light emitting diode, and the reinforcing layer is immersed in the organic light emitting diode.
In one embodiment, the reinforcing layer comprises one or more of silicone oil, kerosene, fluorinated hydrocarbons, chlorinated hydrocarbons.
In one embodiment, the reinforcing layer comprises one or more of ethyl acetate, fluorinated esters, chlorinated esters.
In one embodiment, the reinforcing layer comprises one or more of benzene, toluene, fluorobenzene, chlorobenzene, fluorobenzene, and methylbenzene.
In one embodiment, the reinforcing layer comprises glycerol.
In one embodiment, the edges of the cover plate, the side wall of the substrate and the sealant are flush to form a side surface of the OLED screen, and a silicon carbide layer is arranged on the side surface of the OLED screen.
In one embodiment, the cover plate and the substrate are made of glass.
An electronic device includes an OLED screen.
The electronic device comprises the OLED screen, and the screen is strong in impact resistance and not easy to break.
A method of manufacturing an OLED screen, comprising:
providing a cover plate and a substrate;
disposing an organic light emitting diode on a substrate;
arranging sealant on the periphery of the surface of the substrate, which is provided with the organic light-emitting diode;
a liquid reinforcing layer is filled in the area surrounded by the sealant; and the number of the first and second groups,
and pressing the cover plate and the substrate relatively, melting the sealant, and bonding the cover plate and the substrate together.
According to the manufacturing method of the OLED screen, the liquid reinforcing layer is arranged in the area surrounded by the sealant, the cover plate and the substrate, and the cover plate and the substrate are adsorbed into a whole, so that the OLED screen is high in impact resistance, and the reinforcing layer is liquid and has impact buffering capacity, and the OLED screen is not damaged.
In one embodiment, the reinforcing layer is a transparent hydrophobic or hydrophilic liquid, and does not react with the cover plate, the substrate, the sealant and the organic light emitting diode, and the reinforcing layer is immersed in the organic light emitting diode.
In one embodiment, the cover plate, the side wall of the substrate and the edge of the sealant are flush to form a side surface of the OLED screen, and a silicon carbide layer is arranged on the side surface of the OLED screen.
Drawings
In order to more clearly illustrate the embodiments of the present application 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, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front view of an electronic device according to an embodiment, wherein a screen of the electronic device is an OLED screen;
FIG. 2 is a schematic three-dimensional exploded view of the OLED screen of the electronic device shown in FIG. 1;
fig. 3 is a schematic cross-sectional profile view of the OLED screen of the electronic device shown in fig. 1.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As used herein, a "communication terminal" (or simply "terminal") includes, but is not limited to, a device that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver.
Referring to fig. 1 and 2, in an embodiment, the electronic device 10 is a mobile phone, and the display screen of the electronic device 10 is an OLED screen 100.
As shown in fig. 2, in one embodiment, the OLED screen 100 includes a cover plate 110, a substrate 120, an organic light emitting diode 130, and a reinforcing layer 140. The cover plate 110 and the substrate 120 are arranged oppositely and made of glass, and the cover plate 110 and the substrate 120 are bonded together through a sealant 150. The sealant 150 is adhered to edges of the oppositely disposed surfaces of the cover plate 110 and the substrate 120, and the sealant 150 has a certain height, so that a space exists between the cover plate 110 and the substrate 120. The sealant 150, the cover plate 110 and the substrate 120 together enclose a sealed cavity 160, so as to prevent substances unfavorable for the organic light emitting diode 130 in the external environment from entering the cavity 160.
In one embodiment, as shown in fig. 2, the organic light emitting diode 130 is disposed in the cavity 160. The organic light emitting diode 130 is fixed on the substrate 120. The substrate 120 is provided with a plurality of organic light emitting diodes 130, and the organic light emitting diode 130 in fig. 2 is an enlarged schematic view of only one of the organic light emitting diodes. The OLED screen is powered on and the organic light emitting diode 130 emits light, so that the OLED screen becomes bright.
As shown in fig. 2 and 3, in one embodiment, a reinforcing layer 140 is disposed between the cover plate 110 and the base plate 120. The reinforcing layer 140 is a transparent liquid and fills the sealed cavity 160 defined by the cover plate 110, the substrate 120 and the sealant 150. The reinforcing layer 140 comprises a first liquid level 141 and a second liquid level 142 arranged opposite to each other, and a side 143 connecting the first liquid level 141 and the second liquid level 142. The first liquid level 141 and the cover plate 110 are free of air, vacuum adsorption is achieved, and the adsorption force is strong, so that the cover plate 110 and the reinforcing layer 140 are not easy to separate; no air exists between the second liquid surface 142 and the substrate 120, vacuum adsorption is achieved, and the adsorption force is strong, so that the substrate 120 and the reinforcing layer 140 are not easy to separate; the side 143 is attached to the sealant 150. It will be appreciated that the liquid reinforcement layer 140 fills the cavity 160 and tightly adheres the cover plate 110 and the base plate 120 together, thereby integrating the cover plate 110 and the base plate 120. The condition that when the space between the cover plate 110 and the substrate 120 is hollow, the OLED screen is separated or broken by external impact, so that the whole OLED screen fails is avoided. The reinforcing layer 140 is arranged in the OLED screen, when the OLED screen is impacted, the cover plate 110, the substrate 120 and the reinforcing layer 140 are integrated, the impact resistance is strong, and the reinforcing layer 140 is liquid and has the impact buffering capacity, so that the OLED screen is not damaged.
As shown in fig. 2 and 3, in an embodiment, the liquid-state strengthening layer 140 does not react with all substances on the cover plate 110 and the substrate 120, including physical reaction and chemical reaction, and does not affect the organic light emitting diode 130. The liquid strengthening layer 140 is colorless and transparent, and does not affect the brightness of the organic light emitting diode 130. The reinforcement layer 140 immerses the organic light emitting diodes 130 to achieve sealing of the organic light emitting diodes 130. The reinforcing layer 140 is filled with the cavity 160, so that external moisture, oxygen, heat and the like are prevented from invading into the OLED screen and contacting with the organic light emitting diode 130 to damage the OLED screen, the service life of the OLED screen is ensured, and the repair rate of products can be greatly reduced. The freezing point of the liquid reinforcing layer 140 is below-30 ℃ and the boiling point exceeds 100 ℃, so that the substances can not be subjected to freezing or boiling reaction under the normal use state of the OLED screen, and the display effect of the OLED screen is not influenced.
In one embodiment, the reinforcing layer 140 is a transparent water-repellent liquid, which may be pure or a mixture. The reinforcing layer 140 includes one or more of hydrocarbons such as kerosene, fluorinated hydrocarbons, chlorinated hydrocarbons, and the like, or silicone oil. The silicone oil has good chemical stability, insulativity and good hydrophobic property, and the chemical formula is as follows: (CH3)3SiO [ (CH3)2SiO ] n-Si (CH3)3, it is known that the silicone oil does not contain hydrophilic groups, i.e., water molecules cannot enter the liquid silicone oil under normal conditions, and the organic light emitting diode 130 can be effectively protected from being damaged by water vapor and oxygen. The kerosene is a high-boiling-point hydrocarbon mixture with the carbon number of C11-C17. The main component is saturated hydrocarbon, and also contains unsaturated hydrocarbon and aromatic hydrocarbon. It can be known that the kerosene does not contain hydrophilic groups, and water molecules cannot enter the liquid kerosene, so as to protect the organic light emitting diode 130 from being damaged by water vapor and oxygen. The fluorinated hydrocarbon and the chlorinated hydrocarbon are both hydrocarbon derivatives, the fluorinated hydrocarbon is prepared by replacing hydrogen atoms in alkane with fluorine atoms, and the chlorinated hydrocarbon is prepared by replacing hydrogen atoms in alkane with chlorine. There is no hydrophilic group in both fluorinated hydrocarbon and chlorinated hydrocarbon, so under normal conditions, water molecules cannot enter fluorinated hydrocarbon and chlorinated hydrocarbon, protecting the organic light emitting diode 130 from being damaged by water vapor and oxygen. Therefore, the reinforcing layer 140 has good water repellency, and after the reinforcing layer is filled in the cavity 160, water vapor and oxygen in the air cannot be mixed in the cavity, so that the organic light emitting diode 130 is not affected by the water vapor and the oxygen. The material does not react with all the materials on the cover plate 110 and the substrate 120, and the material is transparent and does not affect the brightness of the organic light emitting diode 130.
In one embodiment, the reinforcing layer 140 is a transparent water-repellent liquid, which may be pure or a mixture. The reinforcing layer 140 includes one or more esters such as ethyl acetate, fluorinated esters, and chlorinated esters. The molecular formula of the ethyl acetate is CH3COOCH2CH3, and the ethyl acetate is colorless transparent liquid and is insoluble in water. Moisture and oxygen in the air are difficult to enter the cavity 160, and the moisture and the oxygen are prevented from contacting the organic light emitting diode 130 and causing damage to the organic light emitting diode.
The esters carry an ester functional group: -COOR, the fluorinated ester bearing functional groups: -COOF, functional group in chlorinated ester: -COOCL. The esters are generally neutral colorless transparent liquid, and are insoluble in water, so that water vapor and oxygen in the air can be prevented from entering the cavity 160 to damage the organic light emitting diode 130, and the brightness of the organic light emitting diode 130 is not affected.
In one embodiment, the reinforcing layer comprises one or more aromatic hydrocarbons such as benzene, toluene, fluorobenzene, chlorobenzene, fluorobenzene, and methylbenzene. Benzene has the formula C6H6, and the monovalent radical remaining after removal of one hydrogen atom from any carbon in the benzene molecule is the simplest and most common phenyl group. The molecular formula of aromatic hydrocarbons such as toluene, fluorobenzene, chlorobenzene, fluorobenzene, and methylbenzene with phenyl is C6H 5-R. The aromatic hydrocarbon substance is colorless transparent liquid, is insoluble in water, and can prevent water vapor and oxygen in the air from entering the cavity 160 to damage the organic light emitting diode 130. And the substances are colorless transparent liquid, which does not affect the brightness of the organic light emitting diode 130.
In one embodiment, the reinforcing layer comprises a hygroscopic alcohol such as glycerol. The glycerol is commonly called glycerin, is colorless and transparent, has hygroscopicity, can be mixed and dissolved with water in any proportion, and can lock water. The organic light emitting diode 130 is prevented from being damaged by moisture and oxygen.
As shown in fig. 3, in an embodiment, the edges of the cover plate 110, the sidewall of the substrate 120 and the sealant 150 are flush, forming a side surface of the OLED screen, and a silicon carbide layer 170 is disposed on the side surface of the OLED screen. The chemical formula of the silicon carbide is as follows: and SiC. Pure silicon carbide is a colorless and transparent crystal and does not affect the brightness of the organic light emitting diode 130. The silicon carbide layer 170 has high density due to stable chemical properties, so that water vapor and oxygen in the air can be effectively prevented from entering the cavity 160. The silicon carbide layer 170 has good wear resistance and high hardness, and the mohs hardness is 9.5, which is second to the hardest diamond (10 grade) in the world, and can increase the strength of the OLED screen. And the silicon carbide layer 170 has high thermal conductivity and small thermal expansion coefficient, so the silicon carbide layer 170 does not obstruct the heat dissipation of the OLED screen, and the silicon carbide layer 170 does not fall off from the OLED screen due to thermal expansion.
A method of manufacturing an OLED screen, comprising:
providing a cover plate 110 and a base plate 120;
an organic light emitting diode 130 is disposed on the substrate;
coating a sealant 150 around the surface of the substrate on which the organic light emitting diode 130 is disposed;
the liquid reinforcing layer 140 is filled in the area surrounded by the sealant 150; and the number of the first and second groups,
the cover plate 110 and the substrate 120 are pressed against each other, and the sealant 150 is melted to bond the cover plate 110 and the substrate 120 as a whole.
In one embodiment, the cover plate 110 and the substrate 120 are made of glass according to the size of the OLED screen, and the organic layer is coated on the substrate 120. The coating method includes vacuum deposition or vacuum thermal evaporation, organic vapor deposition, ink-jet printing, and then metal cathode evaporation to fabricate the organic light emitting diode 130. A driving circuit for driving the organic light emitting diode 130, for example, including a power line, and the like, and for example, a gate line, a data line, a switching transistor, a driving transistor, a storage capacitor, and the like may be further provided on the substrate 120.
In one embodiment, a circle of sealant 150 is coated around the surface of the substrate 120 on which the organic light emitting diode 130 is disposed. After the sealant 150 is cured, the liquid reinforcing layer 140 is injected into the region surrounded by the sealant 150, and the liquid is laid flat in the region surrounded by the sealant 150 by standing. Then, the cover plate 110 is covered to make the edge of the cover plate 110 flush with the edge of the substrate 120, and the position where the sealant 150 is disposed on the periphery is irradiated with ultraviolet light or heated, for example, laser heated, so that the sealant 150 is melted and the cover plate 110 and the substrate 120 are pressed and bonded together, thereby encapsulating the organic light emitting diode 130. The method for curing the sealant 150 is not limited in this embodiment, and the specific curing method can be determined by those skilled in the art according to the type and corresponding properties of the sealant 150.
It should be noted that, a plurality of organic light emitting diodes 130 are included in one OLED screen, and each organic light emitting diode 130 may be encapsulated by using a sealant 150, or a plurality of organic light emitting diodes 130 are encapsulated together by using the sealant 150. In the case that the plurality of organic light emitting diodes 130 are packaged together by the sealant 150, the interior of the package includes a plurality of organic light emitting diodes 130 arranged in an array, and a planar structure is formed on the whole, which can be applied to a device requiring whole-surface light emission, such as the OLED screen of this embodiment. The organic light emitting diode 130 includes an anode, an organic light emitting layer, and a cathode, which are sequentially stacked, and in operation, electrons are injected from the cathode and holes are injected from the anode, and the two are recombined in the organic light emitting layer and then light emission is excited. If necessary, a hole injection layer and a hole transport layer may be provided from the anode to the organic light-emitting layer, and an electron injection layer and an electron transport layer may be provided from the cathode to the organic light-emitting layer. For example, the anode is usually made of a conductive material with a high work function, such as Indium Tin Oxide (ITO) or the like; the cathode is usually made of a conductive material with low work function, such as Ag, Al, Ca, In, Li and Mg, or a composite metal with low work function (such as Mg-Ag magnesium silver). The organic light emitting diode 130 may emit red light, green light, blue light, white light, etc. when operating; for example, in order to assist in adjusting the color of light, a fluorescent layer or a color filter may be disposed on the light emitting side of the organic light emitting diode 130.
In one embodiment, the edges of the cover plate 110, the sidewalls of the substrate 120 and the sealant 150 are flush to form the side surfaces of the OLED screen, and a silicon carbide layer 170 is disposed on the side surfaces of the OLED screen. The silicon carbide layer 170 is formed on the side surface of the OLED screen by physical or chemical vapor deposition, spraying, or the like.
In an embodiment, an electronic device 10 includes the OLED screen 100. The screen of the electronic device 10 has increased resistance to falling and is less likely to shatter.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. The OLED screen is characterized by comprising a cover plate, a base plate and an organic light emitting diode, wherein the cover plate and the base plate are arranged oppositely, the organic light emitting diode is positioned between the cover plate and the base plate, the edge of the cover plate and the edge of the base plate are bonded through a sealant, a liquid reinforcing layer is filled in an area surrounded by the cover plate, the base plate and the sealant, and the reinforcing layer adsorbs the cover plate and the base plate respectively.
2. The OLED screen of claim 1, wherein the reinforcing layer is a transparent, water repellent or hydrophilic liquid that does not react with the cover plate, substrate, sealant, and organic light emitting diodes, the reinforcing layer submerging the organic light emitting diodes.
3. The OLED screen of claim 2, wherein the reinforcing layer comprises one or more of silicone oil, kerosene, fluorinated hydrocarbons, chlorinated hydrocarbons.
4. The OLED screen of claim 2, wherein the reinforcing layer includes one or more of ethyl acetate, fluorinated esters, chlorinated esters.
5. The OLED screen of claim 2, wherein the reinforcing layer comprises one or more of benzene, toluene, fluorobenzene, chlorobenzene, fluorobenzene, and methylbenzene.
6. The OLED screen of claim 2, wherein the reinforcing layer includes glycerol.
7. The OLED screen of claim 1, wherein the edges of the cover sheet, the sidewalls of the substrate, and the sealant are flush to form sides of the OLED screen, and wherein the sides of the OLED screen are provided with a silicon carbide layer.
8. The OLED screen of claim 1, wherein the cover plate and the substrate are both glass.
9. An electronic device, characterized in that it comprises an OLED screen according to any one of claims 1 to 8.
10. A method of manufacturing an OLED screen, comprising:
providing a cover plate and a substrate;
disposing an organic light emitting diode on a substrate;
arranging sealant on the periphery of the surface of the substrate, which is provided with the organic light-emitting diode;
a liquid reinforcing layer is filled in the area surrounded by the sealant; and the number of the first and second groups,
and pressing the cover plate and the substrate relatively, melting the sealant, and bonding the cover plate and the substrate together.
11. The method of claim 10, wherein the reinforcing layer is a transparent hydrophobic or hydrophilic liquid that does not chemically react with the cover plate, the substrate, the sealant, and the organic light emitting diode, and the reinforcing layer immerses the organic light emitting diode.
12. The method of claim 10, wherein the edges of the cover plate, the substrate and the sealant are flush to form the sides of the OLED screen, and further comprising providing a silicon carbide layer on the sides of the OLED screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810836586.3A CN110767818A (en) | 2018-07-26 | 2018-07-26 | OLED screen, manufacturing method thereof and electronic device |
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| CN201810836586.3A CN110767818A (en) | 2018-07-26 | 2018-07-26 | OLED screen, manufacturing method thereof and electronic device |
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| CN110767818A true CN110767818A (en) | 2020-02-07 |
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