WO2015100798A1 - Oled面板及其制作方法与封装效果的检测方法 - Google Patents

Oled面板及其制作方法与封装效果的检测方法 Download PDF

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Publication number
WO2015100798A1
WO2015100798A1 PCT/CN2014/070551 CN2014070551W WO2015100798A1 WO 2015100798 A1 WO2015100798 A1 WO 2015100798A1 CN 2014070551 W CN2014070551 W CN 2014070551W WO 2015100798 A1 WO2015100798 A1 WO 2015100798A1
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WIPO (PCT)
Prior art keywords
moisture
oled panel
cover plate
substrate
sensitive color
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/070551
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English (en)
French (fr)
Inventor
曾维静
刘亚伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/345,905 priority Critical patent/US20150185142A1/en
Publication of WO2015100798A1 publication Critical patent/WO2015100798A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/70Testing, e.g. accelerated lifetime tests
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80Constructional details
    • H10K59/87Passivation; Containers; Encapsulations
    • H10K59/874Passivation; Containers; Encapsulations including getter material or desiccant

Definitions

  • the flat display device has many advantages such as thin body, power saving, no radiation, and has been widely used.
  • the existing flat display devices mainly include a liquid crystal display (LCD) and an organic light emitting display (OLED).
  • the organic light-emitting display device has the characteristics of self-luminous, high brightness, wide viewing angle, high contrast, flexibility, low power consumption, etc., and thus has received extensive attention, and as a new generation of display mode, has gradually replaced the conventional liquid crystal display device, Widely used in mobile phone screens, computer monitors, full color TVs, etc.
  • OLED display technology is different from traditional LCD display methods. It does not require a backlight. It uses a very thin coating of organic materials and a glass substrate. When there is current, these organic materials will emit light. However, because organic materials are easily reacted with water and oxygen, Due to organic material-based display devices, OLED panels have very high requirements for packaging.
  • OLED components are required to have a lifetime (life:) greater than or equal to 10,000 hours; a water vapor transmission rate of less than or equal to 1 (T 6 g/m 2 /day); oxygen permeability Less than or equal to the package effect requirement of iT 5 cc/ra 2 /day ( latm ). It can be seen that packaging is one of the most important processes in the entire OLED panel production process and is the key to affecting product yield.
  • the drying agent is swelled after moisture absorption, and the area before and after the drying is recorded by means of image capturing, and the size of the image area of the drying agent is used to determine the desiccant. Whether it expands, it is known whether the OLED panel enters water vapor due to poor packaging.
  • the principle of the method is simple, but there are problems of reliability, for example, the volume expansion of the drying agent after moisture absorption, and only the change of the reaction area by the image capturing method; and the contrast of the image by the camera does not reflect the drying agent. A small volume change after moisture absorption. Therefore, the use of the method of hygroscopic expansion of the desiccant to detect the packaging effect needs to be improved. long.
  • Another object of the present invention is to provide a method for fabricating an OLED panel, which has a simple process, and the OLED panel produced by the method has a long service life, and can effectively detect the package effect, and improve the product yield.
  • Another object of the present invention is to provide a method for detecting a package effect, which can easily determine whether a package is ineffective by eye visual inspection, and can effectively detect the water content in the sealed space of the OLED panel, thereby accurately determining the packaging effect of the OLED panel. , and easy to implement, will not adversely affect the panel.
  • the present invention provides an OLED panel, comprising: a substrate, a cover plate disposed opposite to the substrate, an OLED element disposed on the substrate, a moisture sensitive color film disposed on the cover plate, and the substrate and the cover plate are adhered Forming a sealed space between the substrate, the cover plate, and the sealant frame, the OLED element and the moisture sensitive color change film are sealed in the sealed space, and the humidity sensitive color change film is made to be hygroscopic
  • the expanded polymeric material is made by incorporating a metal compound salt.
  • liquid desiccant disposed within the sealed space.
  • the metal compound salt is composed of cobalt chloride and cobalt sulfate.
  • the copper sulfide and the copper chloride are composed; the substrate is an array substrate, the cover plate is made of glass, and the sealant frame is made of glass glue or UV glue.
  • the invention also provides a method for manufacturing an OLED panel, comprising the following steps:
  • Step 1 Provide a cover plate
  • Step 2 coating the glass glue on the edge of the cover plate, and baking the glass glue at a high temperature to form a sealant frame;
  • Step 3 coating a moisture sensitive color film on the peripheral edge of the cover plate and in the sealant frame, and performing low temperature baking, wherein the humidity sensitive color change film is made of a metal compound salt which is easily absorbed by the hygroscopic expansion polymer material. ;
  • Step 4 Apply UV glue on the sealant frame
  • Step 5 providing a substrate on which an OLED element is formed
  • Step 6 The substrate and the cover are aligned and bonded together by UV glue to cure the UV glue and the sealant frame to complete the fabrication of the OLED panel.
  • the step 4 further includes coating a liquid drier on the cover plate and in the sealant frame;
  • the metal compound salt is composed of cobalt chloride, cobalt sulfate, copper sulfate and copper chloride;
  • the substrate is an array substrate, and the cover plate is made of glass.
  • the invention also provides a method for manufacturing an OLED panel, comprising the following steps:
  • Step 11 Provide a cover plate
  • Step 12 applying a moisture sensitive color film to the peripheral edge of the cover plate, and baking at a low temperature.
  • the moisture sensitive color changing film is made of a metal compound salt which is easily hygroscopically expanded;
  • Step 13 is applied to the periphery of the cover plate and coated with UV glue on the periphery of the humidity sensitive color film to form a sealant. frame;
  • Step 14 Providing a substrate on which an OLED element is formed
  • Step 15 The substrate and the cover are aligned and bonded together by UV glue to cure the sealant frame to complete the fabrication of the OLED panel.
  • the step 13 further includes coating a liquid drier on the cover plate and in the sealant frame;
  • the metal compound salt is composed of cobalt chloride, cobalt sulfate, copper sulfate and copper chloride;
  • the substrate is an array substrate, and the cover plate is made of glass.
  • the invention also provides a method for detecting a packaging effect, comprising the following steps:
  • Step 10 Providing an OLED panel, the OLED panel includes: a substrate, a cover plate disposed opposite to the substrate, an OLED element disposed on the substrate, a humidity sensitive color film disposed on the cover plate, and bonding the substrate to the cover plate a sealing space is formed between the substrate, the cover plate and the sealant frame, and the OLED element and the moisture sensitive color film are sealed in the sealed space, and the humidity sensitive color film is swelled by moisture absorption.
  • the polymer material is made by incorporating a metal compound salt;
  • Step 102 Observing the color change of the moisture sensitive color film by eyes to initially determine the package? 81 fruit;
  • Step 103 Providing a measuring device, measuring an infrared spectrum curve of the humidity sensitive color changing film, and analyzing the infrared spectral curve to accurately calculate the water content in the sealed space, thereby accurately determining the packaging effect.
  • the metal compound salt is composed of cobalt chloride, cobalt sulfate, copper sulfate and copper chloride;
  • the substrate is an array substrate, the cover plate is made of glass, and the sealant frame is made of glass glue or UV glue. .
  • the measuring device is an infrared illuminator.
  • the OLED panel of the present invention is made of a hygroscopically swellable polymer material by incorporating a metal salt of a polymer material which is hygroscopically swellable, and a polymer material which is hygroscopically swellable. It has good hygroscopicity, so the humidity sensitive color film can be used as a drying agent in the sealed space of the OLED panel to prolong the service life of the OLED panel, and some metal compounds in the metal compound salt react with the ice vapor. After that, it will become a hydrate and the color will change.
  • the package effect can be judged according to the change of the color after moisture absorption of the moisture sensitive color film, and the package can be judged by the eye to determine whether the package is invalid or not.
  • the water vapor content in the sealed space of the OLED panel is accurately detected, and the packaging effect is accurately determined.
  • the process of the OLED panel used for the detection method is simple and easy to implement.
  • FIG. 1 is a cross-sectional structural view of a preferred embodiment of an OLED panel of the present invention
  • FIG. 2 is a cross-sectional structural view of another preferred embodiment of the OLED panel of the present invention
  • FIG. 3 is a flow chart of a first embodiment of a method for fabricating an OLED panel according to the present invention
  • FIG. 4 is a flow chart of a second embodiment of a method for fabricating an OLED panel of the present invention.
  • FIG. 5 is a flow chart of a third embodiment of a method for fabricating an OLED panel of the present invention.
  • FIG. 6 is a flow chart of a fourth embodiment of a method for fabricating an OLED panel of the present invention.
  • FIG. 7 is a flow chart of a method for detecting an effect of packaging an OLED panel according to the present invention. Specific travel mode
  • an OLED panel includes: a substrate 20 , a cover 30 disposed opposite the substrate 20 , an OLED element 22 disposed on the substrate 20 , and a humidity sensitive color film 40 disposed on the cover 30 .
  • the metal compound salt is composed of cobalt chloride (CoCi 2 ), cobalt sulfate (CoS0 4 ), copper sulfate
  • the metal compound salt may become a hydrate after the water vapor permeates into the sealed space 24 (for example, CuS0 4 becomes CuS0 4 *53 ⁇ 40, from white to blue), thereby causing the
  • the moisture-sensitive color change film 40 produces a change in color.
  • the change of matter will lead to the change of absorption light, so that the infrared spectrum curve can be measured by measuring instruments such as infrared light, and the infrared moisture curve can be analyzed to achieve accurate measurement of the moisture content inside the OLED panel. Calculate the water vapor permeability inside the OLED panel to further accurately determine the packaging effect of the OLED panel. Therefore,
  • the moisture-sensitive color-changing film 40 made of a metal compound salt which is easily absorbed by the hygroscopically swellable polymer material can be used as a judgment of the OLED panel according to the change of the color after moisture absorption.
  • the OLED element 22 generally includes an anode, an organic layer formed on the anode, and a cathode formed on the organic layer. It is worth mentioning that the organic layer generally comprises a hole transport layer (HTL) formed on the anode, and an organic light-emitting layer (EML) formed on the hole transport layer. An electron transport layer (ETL) on the organic light-emitting layer, each layer of which can be formed by evaporation.
  • HTL hole transport layer
  • EML organic light-emitting layer
  • the substrate 20 is an Array substrate made of a transparent material, preferably made of glass.
  • the cover plate 30 is made of a transparent material, preferably made of glass.
  • the sealant frame 50 is made of glass glue or UV glue.
  • FIG. 2 is another embodiment of the OLED panel of the present invention.
  • the embodiment is substantially the same as the embodiment shown in FIG. 1 , and the only difference is:
  • the OLED panel further includes a liquid desiccant 60 disposed in the sealed space 24 to react with oxygen to extend the service life of the OLED panel.
  • the present invention further provides a method for fabricating an OLED panel, including the following steps: Step 1. Providing a cover 30 .
  • the cover plate 30 is made of a transparent material, preferably made of glass.
  • Step 2 Apply a frit glue to the peripheral edge of the cover 30, and bake the glass paste at a high temperature to form a sealant frame 50.
  • the glass glue is applied to the peripheral edge of the cover plate 30 and baked by high temperature to semi-cure the glass paste to form a sealant frame 50.
  • Step 3 coating the humidity sensitive color film 40 at the peripheral edge of the cover plate 30 and in the sealant frame 50, and performing low temperature baking, wherein the humidity sensitive color change film 40 is mixed with the metal by the hygroscopically swellable polymer material.
  • the metal compound salt is composed of a metal compound such as cobalt chloride (CoCl 2 ), cobalt sulfate (CoS0 4 ), copper sulfate (CuS0 4 ), or copper chloride (CuCl 2 ).
  • the metal compound salt may become a hydrate after the water vapor penetrates into the interior of the OLED panel (for example, CuS0 4 becomes CuS0 4 * 53 ⁇ 40, and changes from white to blue), thereby causing the humidity-sensitive discoloration. Film 40 produces a change in color. Through eye visual inspection, it is possible to initially judge the packaging effect of the OLED panel. The more water vapor that penetrates into the interior of the OLED panel, the more metal compound molecules are converted into hydrates.
  • the moisture-sensitive color-changing film 40 made of a metal compound salt which is easily absorbed by the hygroscopically swellable polymer material can be used not only as a drying agent, but also as a judgment as to whether or not the package of the OLED panel is invalid according to the change in color after moisture absorption. ⁇ According to.
  • the cover plate 30 is baked at a low temperature after forming the moisture sensitive color changing film 40 to ensure its dryness.
  • Step 4. Apply UV glue to the sealant frame 50.
  • a layer of UV glue is applied to the sealant frame 50 to effectively improve the sealing effect.
  • Step 5 A substrate 20 is provided, on which an OLED element 22 is formed.
  • the substrate 20 is an Array substrate, which is made of a transparent material, preferably made of glass.
  • the OLED element 22 generally includes an anode, an organic layer formed on the anode, and a cathode formed on the organic layer. It is worth mentioning that the organic layer generally comprises a hole transport layer (HTL) formed on the anode, an organic light emitting layer (EML) formed on the hole transport layer, An electron transport layer (ETL) formed on the organic light-emitting layer, each layer of which can be formed by evaporation.
  • HTL hole transport layer
  • EML organic light emitting layer
  • ETL electron transport layer
  • Step 6 The substrate 20 and the cover 30 are aligned and bonded together by UV glue, and the UV glue and the sealant frame 50 are cured to complete the fabrication of the OLED panel.
  • the substrate 20 is aligned with the cover plate 30, and the UV glue is cured by ultraviolet irradiation, and then laser sealed to cure the glass glue, that is, the sealant frame 50 is cured, and then the OLED element 22 is cured.
  • the moisture sensitive color film 40 is sealed in the sealed space 24 formed by the substrate 20, the cover 30 and the sealant frame 50 to complete the fabrication of the OLED panel.
  • the OLED panel produced by this method has a long service life and can effectively detect the package effect and improve the product yield.
  • FIG. 4 is a second embodiment of the manufacturing method of the OLED panel of the present invention.
  • the embodiment is basically the same as the embodiment shown in FIG. 3 , and the only difference is:
  • the step 4 further includes coating a liquid desiccant 60 on the cover plate 30 and in the sealant frame 50 to further absorb moisture inside the OLED panel to prevent organic materials and water inside the OLED panel. Oxygen reaction, extending the life of the OLED panel.
  • FIG. 5 is a third embodiment of a method for fabricating an OLED panel according to the present invention.
  • the present invention further provides a method for fabricating an OLED panel, including the following steps: Step 11. Provide a cover 30
  • Step 11 Provide a cover 30
  • Step 12 Provide a cover 30
  • the cover plate 30 is made of a transparent material, preferably made of glass.
  • Step 12 applying a humidity-sensitive color-changing film 40 to the peripheral edge of the cover plate 30, and performing low-temperature baking, wherein the moisture-sensitive color-changing film 40 is made of a metal compound salt which is easily absorbed by the hygroscopically swellable polymer material.
  • the metal compound salt is composed of a metal compound such as cobalt chloride (CoCl 2 ), cobalt sulfate (CoS0 4 ), copper sulfate (CuS0 4 ) 'copper chloride (CuCl 2 ).
  • a metal compound such as cobalt chloride (CoCl 2 ), cobalt sulfate (CoS0 4 ), copper sulfate (CuS0 4 ) 'copper chloride (CuCl 2 ).
  • the partial metal compound therein becomes a hydrate (for example, CuS0 4 becomes CuS0 4 * 53 ⁇ 40, and changes from white to blue), thereby causing the humidity-sensitive discoloration.
  • Film 40 produces a change in color. Through eye visual inspection, it is possible to initially judge the packaging effect of the OLED panel. The more water vapor that penetrates into the interior of the OLED panel, the more metal compound molecules are converted into hydrates.
  • the change of the material will lead to the change of the absorption spectrum, so that the infrared spectrum curve can be measured by a measuring instrument such as an infrared spectrometer, and the infrared moisture curve can be analyzed to achieve accurate measurement of the moisture content inside the OLED panel, and then the OLED can be calculated.
  • the water vapor permeability inside the panel further accurately determines the packaging effect of the OLED panel. Therefore, the moisture-sensitive color-changing film 40 made of a metal compound salt which is easily absorbed by the hygroscopically expandable polymer material can be used not only as a desiccant, but also as a basis for judging whether or not the package of the OLED panel is ineffective according to the change in color after moisture absorption.
  • the cover plate 30 is baked at a low temperature after forming the moisture sensitive color changing film 40 to ensure its dryness.
  • Step 13 Apply UV glue to the peripheral edge of the cover 30 and the periphery of the humidity sensitive film 40 to form a sealant frame.
  • the sealant frame 50 is formed of UV glue.
  • Step 14 Providing a substrate 20 on which an OLED element 22 is formed.
  • the substrate 20 is an Array substrate made of a transparent material, preferably made of glass.
  • the OLED element 22 generally includes an anode, an organic layer formed on the anode, and a cathode formed on the organic layer. It is worth mentioning that the organic layer generally comprises a hole transport layer (HTL) formed on the anode, an organic light emitting layer (EML) formed on the hole transport layer, An electron transport layer (ETL) formed on the organic light-emitting layer, each layer of which can be formed by evaporation.
  • HTL hole transport layer
  • EML organic light emitting layer
  • ETL electron transport layer
  • step! 5 The substrate 20 and the cover 30 are aligned and bonded together by UV glue, and the sealant frame 50 is cured to complete the fabrication of the OLED panel.
  • the substrate 20 is bonded to the cover plate 30, and the UV glue is cured by ultraviolet irradiation.
  • the sealing frame 50 further seals the OLED element 22 and the moisture sensitive color film 40 into the sealed space 24 formed by the substrate 20, the cover 30 and the sealing frame 50 to complete the fabrication of the OLED panel.
  • the OLED panel produced by the method has a long service life and can effectively detect the package effect.
  • the liquid frame 50 is coated with a liquid drying agent 60 to further absorb the moisture inside the OLED panel to prevent
  • the present invention also provides a method for detecting a package effect, which includes the following steps:
  • Step 101 Providing an OLED panel, the OLED panel includes: a substrate 20, a cover plate 30 disposed opposite to the substrate 20, an OLED element 22 disposed on the substrate 20, a humidity sensitive color film 40 disposed on the cover plate 30, and A sealing frame 50 is formed between the substrate 20 and the cover 30, and a sealing space 24 is formed between the substrate 20, the cover 30, and the sealing frame 50.
  • the OLED element 22 and the humidity sensitive film 40 are sealed.
  • the humidity-sensitive color-changing film 40 is made of a metal compound salt in which a polymer material which is hygroscopically swellable is incorporated.
  • the substrate 20 is an Array substrate made of a transparent material, preferably made of glass.
  • the cover plate 30 is made of a transparent material, preferably made of glass.
  • the OLED element 22 generally includes an anode, an organic layer formed on the anode, and a cathode formed on the organic layer. It is worth mentioning that the organic layer generally comprises a hole transport layer (HTL) formed on the anode, and an organic light-emitting layer (EML) formed on the hole transport layer.
  • HTL hole transport layer
  • EML organic light-emitting layer
  • the electricity on the organic light-emitting layer "[electron Transport Layer (E r FL), its layer '1": 3 ⁇ 4 over. Steaming shape.
  • the metal compound salt may become a hydrate after the water vapor permeates into the sealed space 24 (for example, CuS0 4 becomes CuS0 4 *53 ⁇ 40, from white to blue), thereby causing the
  • the moisture sensitive color changing film 40 produces a change in color, so that the packaging effect of the OLED panel can be effectively judged according to the change of the color before and after the humidity sensitive color changing film 40.
  • Step 102 Observe the color change of the humidity-sensitive color changing film 40 by eyes to initially determine the packaging effect.
  • the moisture-sensitive color-changing film 40 made of a metal compound salt which is easily absorbed by the hygroscopically swellable polymer material can be used not only as a drying agent, but also as a basis for judging whether the packaging of the OLED panel is invalid or not according to the change in color after moisture absorption.
  • the color change of the film 40 is more obvious, so the visual effect of the OLED panel can be initially judged by visual inspection of the eye.
  • Step 103 Providing a measuring device, measuring an infrared spectrum curve of the humidity sensitive color changing film 40, and analyzing the infrared spectral curve to accurately calculate the water content in the sealed space 24, thereby accurately determining the packaging effect.
  • the measuring device is an infrared light emitting device.
  • Changes in the substance will result in a change in the infrared absorption spectrum, that is, a certain correspondence between the infrared diffuse reflection spectrum and the molecular structure. Since the infrared diffuse reflectance spectrum has such a distinctive feature, the spatial configuration of the molecule can be established according to the absorption band of the infrared spectrum, the position, intensity, shape, etc. of the wavelength, thereby determining the molecular structure and detecting the composition of the substance.
  • the first-order frequency doubling of the thiol stretching vibration of water molecules is about 1440 nm in the near-infrared region, and the second-order frequency doubling is at 960 nm.
  • the spectral characteristics of the absorption band are extremely obvious.
  • the infrared spectrum curve is shifted upwards as a whole; one wavelength point of the characteristic absorption of moisture is selected as the independent variable of the multiple regression wavelength, and another wavelength point unrelated to the absorption spectrum of the water characteristic is selected, and the absorbance of the two wavelength points is used.
  • the difference can be detected in the 7] content of traditional Chinese medicine.
  • the method for detecting the encapsulation effect of the OLED panel of the present invention can not only visually detect the color change of the humidity-sensitive color-changing film 40 by the eye, but also initially determine the packaging effect, and can also measure the moisture-sensitive color-changing film 40 by using a measuring device (such as an infrared light transmitter, etc.).
  • the infrared spectrum curve, and accurately calculating the water content in the sealed space 24 by analyzing the curve, can accurately calculate the water vapor permeability of the sealed space 24 to accurately determine the packaging effect.
  • y represents the amount of change in intensity of a certain wavelength on the infrared light transmission curve
  • X represents the amount of water absorption per gram of the metal compound in the sealed space 24;
  • the mass of the metal compound in the sealed space 24 is calculated by measuring the doping ratio and density (known) of the metal compound (measured by the machine coated with the wetness sensitive film 40).
  • the infrared spectrum curve of the moisture sensitive color film 40 after water absorption is measured by a measuring tool (such as an infrared light instrument, etc.), and the intensity change value of the specific wavelength is obtained, and the mass m of the metal compound is obtained, The amount of change in intensity of the wavelength per gram of the metal compound is y. y is then compared with the standard working curve obtained by the above experiment to obtain the water absorption amount x per gram of the metal compound.
  • the product of the mass 111 of the metal compound and the amount of water absorption X per gram of the metal compound is the mass of water vapor (in grams) which permeates into the interior of the sealed space 24.
  • Dividing the water vapor mass by the cross-sectional area of the sealant and the air, and dividing it by the temperature and humidity conditions, can obtain the water vapor permeability of the sealant under certain conditions, and then accurately determine whether the package effect is satisfactory. Preset value.
  • the package effect detection method can be applied to an OLED test piece and a finished panel, and can also be applied to electronic components that need to be packaged, such as a solar cell or a liquid crystal display panel.
  • the OLED panel of the present invention, the manufacturing method thereof and the method for detecting the packaging effect are made of a hygroscopically swellable polymer material by using a hygroscopically swellable polymer material to form a moisture-sensitive color-changing film.
  • the moisture absorption property is good, so the humidity sensitive color film can be used as a drying agent in the sealed space of the OLED panel to prolong the service life of the OLED panel, and some metal compounds in the metal compound salt will react with the water vapor. It becomes a hydrate and the color changes.
  • the package effect can be judged according to the change of the color after moisture absorption of the moisture sensitive color film, and the package can be judged by the eye to determine whether the package is invalid or not, and can be accurately detected by infrared light.
  • the water vapor content in the sealed space of the OLTED panel accurately determines the packaging effect, and the process of the OLED panel used for the detection method is simple and easy to implement.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Drying Of Gases (AREA)

Abstract

一种OLED面板及其制作方法与封装效果检测方法。所述OLED面板利用易吸湿膨胀的高分子材料掺入金属化合盐制成湿敏变色膜(40)。由于易吸湿膨胀的高分子材料具有较好的吸湿性,因此可将所述湿敏变色膜(40)用作OLED面板密封空间(24)内的干燥剂,以延长OLED面板的使用寿命;同时金属化合盐中的部分金属化合物在与水汽发生反应后会变成水合物,颜色发生变化,因此还可以根据湿敏变色膜(40)吸湿后颜色的改变判断封装效果,且既可以通过眼睛目测简单地判断封装是否失效,也可以通过红外光谱仪精确检测OLED面板密封空间(24)内的水汽含量,准确的判断封装效果。用于所述检测方法的OLED面板的制程简单,容易实现。

Description

其制作方法与封装效果的检测方法 ^ 平面显示领域, 尤其涉及一种 OLED面;
封装效果的检测方法。
平面显示装置具有机身薄、 省电、 无辐射等众多优点, 得到了广泛的 应用。 现有的平面显示装置主要包括液晶显示装置 (LCD, Liquid Crystal Display ) 及有机发光显示装置 ( OLED , Organic Light Emitting Display ) 。
有机发光显示装置具备自发光、 高亮度、 宽视角、 高对比度、 可挠 曲、 低能耗等特性, 因此受到广泛的关注, 并作为新一代的显示方式, 已 开始逐渐取代传统液晶显示装置, 被广泛应用在手机屏幕、 电脑显示器、 全彩电视等。 OLED显示技术与传统的 LCD显示方式不同, 无需背光灯, 采用非常薄的有机材料涂层和玻璃基板, 当有电流通过时, 这些有机材料 就会发光 但是由于有机材料易与水氧反应, 作为基于有机材料的显示设 备, OLED面板对封装的要求非常高。 为了实现商业化的应用, OLED元件 要求达到使用寿命 ( lifetime:) 大于或等于 10,000小时; 需满足水汽穿透率 小于或等于 1 (T6g/m2/day (天) ; 氧气穿透率小于或等于 iT5cc/ra2/day ( latm ) 的封装效果要求。 由此可见封装是整个 OLED面板生产过程中最 重要的制程之一, 是影响产品良率的关键。
然而, 目前对于大部分的 OLED面板生产过.程, 针对封装效果进行监 测的方法极少。 现有一种使用千燥剂进行封装效果监测的方法, 其原理 是: 千燥剂吸湿后膨胀, 利用摄像方式记录千燥剞前后的面积, 由千燥剂 图像面积值的大小, 以判定干燥剂是否膨胀, 由此得知 OLED面板是否因 封装不良而导致水汽进入。 该方法原理简单, 但是存在可靠性的问题, 如, 千燥剂吸湿后体积膨胀, 而通过摄.像的方法仅能反应面积的变化; 且 通过摄像的图像对比, 并不能反映出千燥剂吸湿后的微小体积变化。 因 此, 利用千燥剂吸湿膨胀的方法检测封装效杲有待改进。 长。
本发明的另一目的在于提供一种 OLED 面板的制作方法, 其制程简 单, 且由该方法制得的 OLED 面板使用寿命长, 且能有效检测其封装效 果., 提 r 产品良率。
本发明的又一目的在于提供一种封装效果的检测方法, 既可通过眼睛 目测简单地判断封装是否失效, 也可有效检测出 OLED面板密封空间内的 水含量, 进而准确判断 OLED面板的封装效果, 且易于实现, 不会对面板 造成不利影响。
为实现上述目的, 本发明提供一种 OLED面板, 包括: 基板、 与基板 相对设置的盖板、 设于基板上的 OLED元件、 设于盖板上的湿敏变色膜及 将基板与盖板粘接在一起的密封胶框, 该基板、 盖板、 及密封胶框之间形 成一密封空间, 该 OLED元件、 湿敏变色膜均密封于该密封空间内, 所述 湿敏变色膜由易吸湿膨胀的高分子材料掺入金属化合盐制成。
还包括设于所述密封空间内的液态千燥剂。
所述金属化合盐由氯化钴、 硫酸钴。 硫酸铜及氯化铜组成; 所述基板 为阵列基板, 所述盖板由玻璃制成, 所述密封胶框由玻璃胶或 UV胶制 成。
本发明还提供一种 OLED面板的制作方法, 包括以下步骤:
步骤 1、 提供盖板;
步骤 2、 在盖板四周边缘位置涂布玻璃胶, 并对该玻璃胶进行高温烘 烤, 以形成密封胶框;
步骤 3、 在盖板的四周边缘位置且在密封胶框内涂布湿敏变色膜, 并 进行低温烘烤, 所述湿敏变色膜由易吸湿膨胀的高分子材料掺入金属化合 盐制成;
步骤 4、 在密封胶框上涂布 UV胶;
步骤 5、 提供基板, 该基板上形成有 OLED元件;
步骤 6、 将基板与盖板对位贴合并通过 UV胶粘接在一起, 固化所述 UV胶及密封胶框, 完成 OLED面板的制作。
所述步骤 4 还包括在所述盖板上且在所述密封胶框内涂布液体千燥 剂; 所述金属化合盐由氯化钴、 硫酸钴, 硫酸铜及氯化铜组成; 所述.基板 为阵列基板, 所述盖板由玻璃制成。
本发明还提供一种 OLED面板的制作方法, 包括以下步骤:
步骤 11、 提供盖板;
步骤 12、 在盖板的四周边缘位置涂布湿敏变色膜, 并进行低温烘烤, 所述湿敏变色膜由易吸湿膨胀的高分子材料掺入金属化合盐制成; 步骤 13 , 在盖板的四周边缘位置且在所述湿敏变色膜外围涂布 UV 胶, 以形成密封胶框;
步骤 14、 提供基板, 该基板上形成有 OLED元件;
步骤 15、 将基板与盖板对位贴合并通过 UV胶粘接在一起, 固化所述 密封胶框, 完成 OLED面板的制作。
所述步骤 13 还包括在所述盖板上且在所述密封胶框内涂布液体千燥 剂; 所述金属化合盐由氯化钴、 硫酸钴, 硫酸铜及氯化铜组成; 所述.基板 为阵列基板, 所述盖板由玻璃制成。
本发明还提供一种封装效果的检测方法, 包括以下步骤:
步骤 10】、 提供 OLED面板, 所述 OLED面板包括: 基板、 与基板相 对设置的盖板、 设于基板上的 OLED元件、 设于盖板上的湿敏变色膜及将 基板与盖板粘接在一起的密封胶框, 该基板、 盖板、 及密封胶框之间形成 一密封空间, 该 OLED元件、 湿敏变色膜均密封于该密封空间内, 所述湿 敏变色膜由易吸湿膨胀的高分子材料掺入金属化合盐制成;
步骤 102、 通过眼睛观察所述湿敏变色膜的颜色变化, 以初步判定封 装? 81果;
步骤 103、 提供测量装置, 测量所述湿敏变色膜的红外光谱曲线, 并 对该红外光谱曲线进行分析, 精确计算出所述密封空间内的含水量, 从而 准确判定封装效果。
所述金属化合盐由氯化钴、 硫酸钴、 硫酸铜及氯化铜组成; 所述基板 为阵列基板, 所述盖板由玻璃制成, 所述密封胶框由玻璃胶或 UV胶制 成。
所述测量装置为红外光 仪。
本发明的有益效果: 本发明的 OLED面板及其制作方法与封装效果的 检测方法, 利用易吸湿膨胀的高分子材料摻入金属化合盐制成湿敏变色 膜, 由于易吸湿膨胀的高分子材料具有较好的吸湿性, 因此可将该湿敏变 色膜用作 OLED 面板密封空间内的千燥剂, 以延长 OLED 面板的使用寿 命, 同时金属化合盐中的部分金属化合物在与氷汽发生反应后会变成水合 物, 颜色发生变化, 因此还可以根据湿敏变色膜吸湿后颜色的改变判断封 装效果, 且, 既可以通过眼睛目测筒单地判断封装是否失效, 也可以通过 红外光语仪精确检测 OLED面板密封空间内的水汽含量, 准确的判断封装 效果, 同时用于该检测方法的 OLED面板的制程简单, 容易实现。
为了能更进一步了解本发明的特征以及技术内容, 请参阅以下有关本 发明的详细说明与酎图, 然而附图仅提供参考与说明用, 并非用来对本发 明加以限制。 附图说明
下面结合附图, 通过对本发明的具体实施方式详细描述, 将使本发明 的技术方案及其它有益效果显而易见。
附图中,
图 1为本发明 OLED面板一较佳实施例的剖面结构示意图;
图 2为本发明 OLED面板另一较佳实施例的剖面结构示意图; 图 3为本发明 OLED面板的制作方法第一实施例的流程图;
图 4为本.发明 OLED面板的制作方法第二实施例的流程图;
图 5为本发明 OLED面板的制作方法第三实施例的流程图;
图 6为本发明 OLED面板的制作方法第四实施例的流程图;
图 7为本发明 OLED面板封装效果的检测方法的流程图。 具体实旅方式
为更进一步阐述本发明所采取的技术手段及其效果, 以下结合本发明 的优选实施例及其附图进行详 ·细描述.0
请参阅图 1, 本发明提供一种 OLED 面板, 包括: 基板 20、 与基板 20相对设置的盖板 30、 设于基板 20上的 OLED元件 22、 设于盖板 30上 的湿敏变色膜 40及将基板 20与盖板 30粘接在一起的密封胶框 50, 该基 板 20、 盖板 30、 及密封胶框 50之间形成一密封空间 24, 该 OLED元件 22、 湿敏变色膜 40均密封于该密封空间 24 内, 所述湿敏变色膜 40 由易 吸湿膨胀的高分子材料掺入金属化合盐制成。
所述金属化合盐由氯化钴 (CoCi2 ) 、 硫酸钴 (CoS04 ) 、 硫酸铜
( CuS04 ) 、 氯化铜 (CuCi2 )等金属化合物组成。 所述金属化合盐在水汽 渗入所述密封空间 24 内部后, 会使其中的部分金属化合物变成水合物 (比如 CuS04变为 CuS04*5¾0, 由白色变为蓝色) , 从而导致所述湿敏变 色膜 40产生颜色的变化。 通过眼睛目测, 就可以初步判断 OLED面板的封 装效果。 渗透进入 OLED面板内部的水汽越多, 就有越多的金属化合物分 子转变为水合物。 物质的变化将导致吸收光借的变化, 从而可以通过红外 光借仪等测量工具测量得到红外光谱曲线, 并通过对红外光谱曲线的分 析, 达到精确测量 OLED面板内部水份含量的目的, 进而可以计算出 OLED 面板内部的水汽渗透率, 进一步精确判断 OLED面板的封装效果。 因此, 由易吸湿膨胀的高分子材料掺入金属化合盐制成的湿敏变色膜 40 不仅可 根据其吸湿后颜色的改变来作为判断 OLED面板的
Figure imgf000007_0001
所述 OLED元件 22 —般包括: 阳极、 形成于阳极上的有机层, 及形 成于有机层上的阴极。 值得一提的是, 所述有机层一般包括形成于阳极上 的空穴传输层 ( Hole Transport Layer, HTL ) 、 形成于空穴传输层上的有 机发光层 ( Emitting Material Layer, EML ) , 形成于有机发光层上的电子 传输层 ( Electron Transport Layer, ETL ) , 其各层可通过蒸镀方式形成。
所述基.板 20 为阵列 (Array )基板, 所述阵列基板由透明材料制成, 优选由玻璃制成。 所述盖板 30由透明材料制成, 优选由玻璃制成。
所述密封胶框 50由玻璃胶或 UV胶制成。
请参阅图 2 , 其为本发明 OLED 面板的另一实施例, 并结合参阅图 1 , 本实施例与图 1 所示的实施例基本相同, 唯一不同之处在于: 本实施 例中, 所述 OLED面板还包括设于所述密封空间 24内的液态千燥剂 60, 氧反应, 延长 OLED面板的使用寿命。
请参阅图 3 , 其为本发明 OLED面板的制作方法的第一实施例, 并结 合参阋图 1 , 本发明还提供一种 OLED面板的制作方法, 包括以下步骤: 步骤 1、 提供盖板 30。
所述盖板 30由透明材料制成, 优选由玻璃制成。
步骤 2、 在盖板 30 四周边缘位置涂布玻璃 (frit )胶, 并对该玻璃胶 进行高温烘烤, 以形成密封胶框 50。
所述玻璃胶涂布于所述盖板 30 四周边缘位置, 并通过高温烘烤, 使 得该玻璃胶半固化, 以形成密封胶框 50。
步骤 3、 在盖板 30的四周边缘位置且在密封胶框 50 内涂布湿敏变色 膜 40, 并进行低温烘烤, 所述湿敏变色膜 40 由易吸湿膨胀的高分子材料 掺入金属化合盐制成。
所述金属化合盐由氯化钴 ( CoCl2 ) 、 硫酸钴 ( CoS04 ) 、 硫酸铜 ( CuS04 ) 、 氯化铜 (CuCl2 )等金属化合物组成。 所述金属化合盐在水汽 渗入 OLED面板内部后, 会使其中的部分金属化合物变成水合物 (比如 CuS04变为 CuS04* 5¾0, 由白色变为蓝色) , 从而导致所述湿敏变色膜 40产生颜色的变化。 通过眼睛目测, 就可以初步判断 OLED面板的封装效 果。 渗透进入 OLED面板内部的水汽越多, 就有越多的金属化合物分子转 变为水合物。 物质的变化将导致吸收光谱的变化, 从而可以通过红外光谱 仪等测量工具测量得到红外光谱曲线, 并通过对红外光谱曲线的分析, 达 到精确测量 OLED面板内部水份含量的目的, 进而可以计算出 OLED面板内 部的水汽渗透率, 进一步精确判断 OLED面板的封装效果。 因此, 由易吸 湿膨胀的高分子材料掺入金属化合盐制成的湿敏变色膜 40 不仅可以作为 千燥剂, 同时可根据其吸湿后颜色的改变来作为判断 OLED面板的封装是 否失效的^■据。
值得一提的是, 由于所述湿敏变色膜 40对湿度的敏感, 所述盖板 30 在形成湿敏变色膜 40后, 对其进行低温烘烤, 以保证其千燥度。
步骤 4、 在密封胶框 50上涂布 UV胶。
在本实施例中, 在所述密封胶框 50 上再涂布一层 UV胶, 可有效提 高密封效果。
步骤 5、 提供基板 20, 该基板 20上形成有 OLED元件 22。
所述基板 20 为阵列 (Array )基板, 所述阵列基板由透明材料制成, 优选由玻璃制成
所述 OLED元件 22—般包括: 阳极、 形成于阳极上的有机层, 及形 成于有机层上的阴极。 值得一提的是, 所述有机层一般包括形成于阳极上 的空穴传输层 (Hole Transport Layer , HTL ) 、 形成于空穴传输层上的有 机发.光层 ( Emitting Material Layer, EML ) 、 形成于有机发光层上的电子 传输层 ( Electron Transport Layer, ETL ) , 其各层可通过蒸镀方式形成。
步骤 6、 将基板 20与盖板 30对位贴合并通过 UV胶粘接在一起, 固 化所述 UV胶及密封胶框 50, 完成 OLED面板的制作。
将基板 20与盖板 30对位贴合, 通过紫外线照射固化所述 UV胶后 -, 再激光密封(laser sealing ) , 以固化玻璃胶, 即固化所述密封胶框 50, 进 而将 OLED元件 22与湿敏变色膜 40密封于该基板 20、 盖板 30与密封胶 框 50形成的密封空间 24内 , 以完成 OLED面板的制作。
用本法制得的 OLED 面板, 其使用寿命长, 且能有效检测其封装效 果, 提高产品良率。
请参阅图 4 , 其为本发明 OLED面板的制作方法的第二实施例, 并结 合参阅图 2及图 3 , 本实施例与图 3所示的实施例基本相同, 唯一不同之 处在于: 本实施例中, 所述步骤 4还包括在所述盖板 30上且在所述密封 胶框 50内涂布液体干燥剂 60, 进一步吸收 OLED面板内部的水汽, 防止 OLED面板内部的有机材料与水氧反应, 延长 OLED面板的使用寿命。
请参阅图 5 , 其为本发明 OLED面板的制作方法的第三实施例, 并结 合参阅图 1, 本发明还提供一种 OLED面板的制作方法, 包括以下步骤: 步骤 11、 提供盖板 30„
所述盖板 30由透明材料制成, 优选由玻璃制成。
步骤 12、 在盖板 30的四周边缘位置涂布湿敏变色膜 40, 并进行低温 烘烤, 所述湿敏变色膜 40 由易吸湿膨胀的高分子材料摻入金属化合盐制 成。
所述金属化合盐由氯化钴 ( CoCl2 ) 、 硫酸钴 ( CoS04 ) 、 硫酸铜 ( CuS04 ) ' 氯化铜 (CuCl2 )等金属化合物组成。 所述金属化合盆在水汽 渗入 OLED面板内部后, 会使其中的部分金属化合物变成水合物 (比如 CuS04变为 CuS04* 5¾0, 由白色变为蓝色) , 从而导致所述湿敏变色膜 40 产生颜色的变化。 通过眼睛目测, 就可以初步判断 OLED面板的封装效 果。 渗透进入 OLED面板内部的水汽越多, 就有越多的金属化合物分子转 变为水合物。 物质的变化将导致吸收光谱的变化, 从而可以通过红外光谱 仪等测量工具测量得到红外光谱曲线, 并通过对红外光谱曲线的分析, 达 到精确测量 OLED面板内部水份含量的目的, 进而可以计算出 OLED面板内 部的水汽渗透率, 进一步精确判断 OLED面板的封装效果。 因此, 由易吸 湿膨胀的高分子材料掺入金属化合盐制成的湿敏变色膜 40 不仅可以作为 干燥剂, 同时可根据其吸湿后颜色的改变来作为判断 OLED面板的封装是 否失效的依据。
值得一提的是, 由于所述湿敏变色膜 40对湿度的敏感, 所述盖板 30 在形成湿敏变色膜 40后, 对其进行低温烘烤, 以保证其千燥度。
步骤 13、 在盖板 30的四周边缘位置且在所述湿敏变色膜 40外围涂布 UV胶, 以形成密封胶框. 50。
本实施例中, 所述密封胶框 50由 UV胶形成。
步骤 14、 提供基板 20, 该基板 . 20上形成有 OLED元件 22。
所述基板 20 为阵列 (Array )基板, 所述阵列基板由透明材料制成, 优选由玻璃制成。
所述 OLED元件 22—般包括: 阳极、 形成于阳极上的有机层, 及形 成于有机层上的阴极。 值得一提的是, 所述有机层一般包括形成于阳极上 的空穴传输层 (Hole Transport Layer, HTL ) 、 形成于空穴传输层上的有 机发.光层 ( Emitting Material Layer, EML ) 、 形成于有机发光层上的电子 传输层 ( Electron Transport Layer, ETL ) , 其各层可通过蒸镀方式形成。
步骤!5、 将基板 20与盖板 30对位贴合并通过 UV胶粘接在一起, 固 化所述密封胶框 50, 完成 OLED面板的制作。
将基板 20与盖板 30相对贴合, 通过紫外线照射固化所述 UV胶, 即 密封胶框 50, 进而将 OLED元件 22与湿敏变色膜 40密封于该基板 20、 盖板 30 与密封胶框 50形成的密封空间 24 内, 以完成 OLED 面板的制 作。
用本法制得的 OLED 面板, 其使用寿命长, 且能有效检测其封装效
Figure imgf000010_0001
胶框 50内涂布液体千燥剂 60 , 进一步吸收 OLED面板内部的水汽, 防止
OLED面板内
Figure imgf000010_0002
, 延长 OLED面板的使用寿命。
请参 7 , 本发明还提供一种封装效果的检测方法, 包括以下 骤:
步骤 101、 提供 OLED面板, 所述 OLED面板包括: 基板 20、 与基板 20相对设置的盖板 30、 设于基板 20上的 OLED元件 22、 设于盖板 30上 的湿敏变色膜 40及将基板 20与盖板 30粘接在一起的密封胶框 50, 该基 板 20、 盖板 30、 及密封胶框 50之间形成一密封空间 24, 该 OLED元件 22、 湿敏变色膜 40均密封于该密封空间 24 内, 所述湿敏变色膜 40由易 吸湿膨胀的高分子材料掺入金属化合盐制成。
所述基.板 20 为阵列 (Array )基板, 所述阵列基板由透明材料制成, 优选由玻璃制成。 所述盖板 30由透明材料制成, 优选由玻璃制成。
所述 OLED元件 22 —般包括: 阳极、 形成于阳极上的有机层, 及形 成于有机层上的阴极。 值得一提的是, 所述有机层一般包括形成于阳极上 的空穴传输层 ( Hole Transport Layer, HTL ) 、 形成于空穴传输层上的有 机发光层 ( Emitting Material Layer, EML ) , 形成于有机发光层上的电 " [专杯 if层 ( Electron Transport Layer, ErFL ) , 其 层' 1":¾过.蒸 方式形.成。
由玻璃胶或 UV i¾制成。
Figure imgf000010_0003
(CoCi2 ) 、 硫酸钴 (CoS04 ) 、 硫酸铜 ( CuS04 ) 、 氯化铜 (CuCi2 )等金属化合物组成。 所述金属化合盐在水汽 渗入所述密封空间 24 内部后, 会使其中的部分金属化合物变成水合物 (比如 CuS04变为 CuS04*5¾0, 由白色变为蓝色) , 从而导致所述湿敏变 色膜 40产生颜色的变化, 因此可根据湿敏变色膜 40前后颜色的改变, 有 效判断 OLED面板的封装效果的好坏。
步骤 102、 通过眼睛观察所述湿敏变色膜 40的颜色变化, 以初步判定 封装效果。 由易吸湿膨胀的高分子材料掺入金属化合盐制成的湿敏变色膜 40 不 仅可以作为千燥剂, 同时可根据其吸湿后颜色的改变来作为判断 OLED面 板的封装是否失效的依据。
渗透进入所述密封空间 24内的水汽越多, 所述湿敏变色膜 40吸收的 水汽就越多, 进 ,¾就有越多的金属化合物分子转变为水合物, 从而导致所 述湿敏变色膜 40 的颜色变化就越明显, 因此通过眼睛目测, 可以初步判 断 OLED面板的封装效果。
步骤 103、 提供测量装置, 测量所述湿敏变色膜 40的红外光谱曲线, 并对该红外光谱曲线进行分析, 精确计算出所述密封空间 24 内的含水 量, 从而准确判定封装效果。
所述测量装置为红外光 ΐ發仪。
物质的变化将导致红外吸收光谱的变化, 即红外漫反射光谱与分子结 构之间具有一定的对应关系。 由于红外漫反射光谱具有这种鲜明的特征, 因此可以根据红外光谱的吸收谱带, 波长的位置, 强度、 形状等确立分子 的空间构型, 进而确定分子结构, 达到对物质成份的检测。 例如, 以通过 红外漫反射光錯定量检测中药中的水含量为例: 水分子的 ΟΗ基伸缩振动 的一级倍频约在近红外区的 1440nm处, 二级倍频在 960nm处, 其合频吸 收带 1940nm 处, 其光谱特性极为明显; 当中药的水含量增加时, 在 760謹〜 2500nm扫描范围内, 所有扫描范围内的波长点由于含水量增大导 致中药颜色变深, 吸光度变大, 红外光谱曲线整体上移; 选取水份的特征 吸收诸的一个波长点作为多元回归波长的自变量, 另外再选取一个与水份 特征吸收谱无关的波长点, 运用这两个波长点的吸光度之差就可以检测出 中药中的 7]含量。
因所述金属化合盐在水汽渗入所述密封空间 24 内部后, 会使其中的 部分金属化合物变成水合物, 进而使所述湿敏变色膜 40 的红外吸收光谱 发生变化。 因此, 本发明的 OLED面板封装效果的检测方法不仅可以通过 眼睛目测湿敏变色膜 40 的颜色变化, 初步判定封装效果, 也可以采用测 量装置 (如红外光傳仪等)测量湿敏变色膜 40 的红外光谱曲线, 并通过 对该曲线分析精确计算出所述密封空间 24 内的含水量, 进而可以精确计 算出所述密封空间 24的水汽渗透率, 以准确判定封装效果。
具体的做法为: 首先通过实验, 建立一种函数关系 y=f ( X ) , 该函数 关系为波长强度变化量与所述湿敏变色膜 40吸水量的标准工作曲线。 y表 示红外光傳曲线上的某个波长的强度变化量, X表示所述密封空间 24内每 克金属化合物的吸水量; 其次, 通过所述湿敏变色膜 40 的高度、 宽度 (可通过涂布所述湿敏变色膜 40 的机台测量得到)及金属化合物的掺杂 比例与密度(已知) , 计算出所述密封空间 24 内的金属化合物的质量 m
(单位克) ; 然后, 通过测量工具(如红外光傅仪器等) 测量所述湿敏变 色膜 40 吸水后的红外光谱曲线, 得到特定波长的强度变化值, 除以金属 化合物的质量 m, 得到每克金属化合物的波长的强度变化量 y。 y再与上 述通过实验得到的标准工作曲线比对, 得到相应每克金属化合物的吸水量 x。 最后, 金属化合物的质量 111与每克金属化合物的吸水量 X的乘积即渗 透进入所述密封空间 24 内部的水汽质量(单位克) 。 水汽质量除以密封 框胶与空气接触的截面积, 再除以特定温度、 湿度条件下测量的时闾, 就 可以得到特定条件下的密封框胶的水汽渗透率, 进而准确判断封装效果是 否满足預设数值。
该封装效果检测方法可用于 OLED测试片及成品面板上, 同时也可应 用在太阳能电池, 液晶显示面板等需要封装的电子元件上。
综上所述, 本发明的 OLED 面板及其制作方法与封装效果的检测方 法, 利用易吸湿膨胀的高分子材料掺入金属化合盐制成湿敏变色膜, 由于 易吸湿膨胀的高分子材料具有较好的吸湿性, 因此可将该湿敏变色膜用作 OLED面板密封空间内的千燥剂, 以延长 OLED面板的使用寿命, 同时金 属化合盐中的部分金属化合物在与水汽发生反应后会变成水合物, 颜色发 生变化, 因此还可以根据湿敏变色膜吸湿后颜色的改变判断封装效果, 且, 既可以通过眼睛目测筒单地判断封装是否失效, 也可以通过红外光借 仪精确检测 OLTED面板密封空间内的水汽含量, 准确的判断封装效果, 同 时用于该检测方法的 OLED面板的制程简单, 容易实现。
以上所述, 对于本领域的普通技术人员来说, 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形, 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
】、 一种 0LED 面板, 包括: 基板、 与基板相对设置的盖板、 设于基 板上的 OLED元件、 设于盖板上的湿敏变色膜及将基板与盖板粘接在一起 的密封胶框, 该基板、 盖板、 及密封胶框之间形成一密封空间, 该 OLED 元件、 湿敏变色膜均密封于该密封空间内, 所述湿敏变色膜由易吸湿膨胀 的高分子材料掺入金属化合盆制成。
2、 如权利要求 1 所述的 OLED面板, 还包括设于所述密封空间内的 液态千燥剂。
3、 如权利要求 1 所述的 OLED 面板, 其中, 所述金属化合盐由氯化 钴、 硫酸钴, 硫酸铜及氯化铜组成; 所述 为阵列基板, 所述盖板由玻 璃制成, 所述密封胶框由玻璃胶或 UV胶制成。
4、 一种 OLED面板的制作方法, 包括以下步骤:
步骤 1、 提供盖板;
步骤 2、 在盖板四周边缘位置涂布玻璃胶, 并对该玻璃胶进行高温烘 烤, 以形成密封胶框;
步骤 3、 在盖板的四周边缘位置且在密封胶框内涂布湿敏变色膜, 并 进行低温烘烤, 所述湿敏变色膜由易吸湿膨胀的高分子材料掺入金属化合 盐制成;
步骤 4、 在密封胶框上涂布 UV胶;
步骤 5、 提供基板, 该基板上形成有 OLED元件;
步骤 6、 将基板与盖板对位贴合并通过 UV胶粘接在一起, 固化所述 UV胶及密封胶框, 完成 OLED面板的制作。
5、 如权利要求 4所述的 OLED面板的制作方法, 其中, 所述步骤 4 还包括在所述盖板上且在所述密封胶框内涂布液体千燥剂; 所述金属化合 盐由氯化钴、 硫酸钴、 硫酸铜及氯化铜组成; 所述基板为阵列基板, 所述 盖板由玻璃制成。
6、 一种 OLED面板的制作方法, 包括以下步骤:
步骤 11、 提供盖板;
步骤 12、 在盖板的四周边缘位置涂布湿敏变色膜, 并进行低温烘烤, 所述湿敏变色膜由易吸湿膨胀的高分子材料掺入金属化合盐制成;
步骤 13、 在盖板的四周边缘位置且在所述湿敏变色膜外围涂布 UV 胶, 以形成密封胶框; 步骤 14、 提供基板, 该基板上形成有 OLED元件;
步骤 15、 将基板与盖板对位贴合并通过 UV胶粘接在一起, 固化所述 密封胶框, 完成 OLED面板的制作。
7、 如权利要求 6所述的 OLED面板的制作方法, 其中, 所述步骤】3 还包括在所述盖板上且在所述密封胶框内涂布液体干燥剂; 所述金属化合 由氯化钴、 硫酸钴, 硫酸铜及氯化铜组成; 所述.基板为阵列基板, 所述 盖板由玻璃制成
8 , 一种封装效果的检测方法, 包括以下步骤:
步骤 101、 提供 OLED面板, 所述 OLED面板包括: 基.板、 与基.板相 对设置的盖板、 设于基板上的 OLED元件、 设于盖板上的湿敏变色膜及将 基板与盖板粘接在一起的密封胶框, 该基板、 盖板、 及密封胶框之间形成 一密封空间, 该 OLED元件、 湿敏变色膜均密封于该密封空间内, 所述湿 步骤 102、 通过眼睛观察 述湿敏变色膜的颜色变 以初步判定封 步骤 103、 提供测量装置, 测量所述湿敏变色膜的红外光傳曲线, 并 对该红外光谱曲线进行分析, 精确计算出所述密封空间内的含水量, 从而 准确判定封装效果。
9、 如权利要求 8 所述的封装效果的检测方法, 其中, 所述金属化合 盐由氯化钴、 硫酸鈷。 硫酸铜及氯化铜组成; 所述基板为阵列基板, 所述 盖板由玻璃制成, 所述密封胶框由玻璃胶或 UV胶制成。
10 , 如权利要求 8所述的封装效果的检测方法, 其中, 所述测量装置 为红外光谱仪。
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