CN111059512A - Automobile tail lamp based on OLED and preparation method thereof - Google Patents

Automobile tail lamp based on OLED and preparation method thereof Download PDF

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Publication number
CN111059512A
CN111059512A CN201911341435.1A CN201911341435A CN111059512A CN 111059512 A CN111059512 A CN 111059512A CN 201911341435 A CN201911341435 A CN 201911341435A CN 111059512 A CN111059512 A CN 111059512A
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CN
China
Prior art keywords
light
module
layer
light module
lamp
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Pending
Application number
CN201911341435.1A
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Chinese (zh)
Inventor
钱强
魏斌
严利民
孙开�
陈石安
邹小昌
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Shanghai Jinghe Photoelectric Technology Co ltd
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Shanghai Jinghe Photoelectric Technology Co ltd
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Priority to CN201911341435.1A priority Critical patent/CN111059512A/en
Publication of CN111059512A publication Critical patent/CN111059512A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
    • 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
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/10—Position lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/40—Rear fog lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/45—Reversing lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Abstract

The invention relates to the technical field of automobile tail lamps, in particular to an OLED-based automobile tail lamp and a preparation method thereof. The invention provides an automobile tail lamp, which comprises a red face mask and a light module arranged on the inner surface of the red face mask; or the lamp module takes the red mask as a substrate; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the light-emitting wavelength of the turn light module is 570-590 nm. According to the invention, the luminous wavelength of the turn light module is controlled to be 570-590 nm by adjusting the functional group of the OLED luminous material, and the light color of the turn light is still yellow on the premise of using the red mask, so that the requirements of national regulations are met.

Description

Automobile tail lamp based on OLED and preparation method thereof
Technical Field
The invention relates to the technical field of automobile tail lamps, in particular to an OLED-based automobile tail lamp and a preparation method thereof.
Background
From a functional point of view, the basic structure of the automobile tail light comprises: a position lamp, a brake lamp, a steering lamp, a backup lamp and a rear fog lamp; from an installation perspective, the above functions may be integrated into one assembly, or may be integrated into two assemblies. For the case of two assemblies, the position light, the brake light and the turn light are functions with higher use frequency and can be integrated in the assembly with higher installation height, while the backup light and the rear fog light have lower use frequency and can be integrated in the assembly with lower installation height, such as under a bumper.
In the development route of automobiles, modeling and exterior development are very important parts. For automobile tail lamps, the development trends in recent years mainly include: the streamlined modeling of rhinoceros, even luminous effect, dark red face guard and full red face guard etc. the development trend enumerated above often can bring nice and beautiful vision enjoyment for the consumer, also brings higher design degree of difficulty for the designer simultaneously, and the biggest challenge that wherein full red face guard brought is exactly to the indicator.
National regulations require that the color of the turn signal light is yellow, and when a yellow light source penetrates through the red mask, a large amount of yellow light can be absorbed by the red mask, so that the requirements of the regulations cannot be passed. The common red mask has extremely strong absorption to light with wavelength larger than 600nm, fig. 1 shows the absorption spectra of four common red plastic parts, when the steering lamp adopts a halogen light source, a transparent mask has to be used, because the emission spectrum of the halogen light source is relatively fixed and is near 600 nm; when the steering lamp adopts an LED light source, most of the situations also adopt a transparent mask, because for a short-wave-band pure yellow LED, the cost is higher, the realization is difficult, the yellow orange light with relatively longer wavelength is easy to realize, and the cost is lower, but if the pure yellow LED and the yellow orange light are combined, the pure yellow LED and the yellow orange light need to be arranged in an assembly of an automobile tail lamp, the outer mask is formed by splicing a red part and a transparent part, the aesthetic degree is greatly reduced, and the cost is greatly increased because double-color injection molding is adopted.
Disclosure of Invention
The invention aims to provide an OLED-based automobile tail lamp and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an OLED-based automobile tail lamp, which comprises a red face mask and a light module arranged on the inner surface of the red face mask; the light source of the light module is an OLED;
the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the light-emitting wavelength of the turn light module is 570-590 nm.
The invention also provides another automobile tail lamp based on the OLED, which comprises a lamp module; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the substrate is a red mask; the light-emitting wavelength of the turn light module is 570-590 nm.
Preferably, the light emitting material of the light emitting layer is independently a fluorescent material and/or a phosphorescent material.
Preferably, the light module further comprises one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module;
the light-emitting wavelength of the rear position lamp module is 620-700 nm; the light-emitting wavelength of the brake lamp module is 620-700 nm; the light emitting color of the reversing lamp module is white light; the light-emitting wavelength of the rear fog lamp module is 570-590 nm.
Preferably, the rear position light module, the brake light module and the turn light module are installed as an assembly; the backup lamp module and the rear fog lamp module are respectively installed as independent assemblies.
Preferably, the material of the red mask is plastic or glass.
The invention also provides a preparation method of the automobile tail lamp, which comprises the following steps:
depositing an anode layer, a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, an electron injection layer and a cathode layer on the surface of the substrate in sequence to obtain a steering lamp module;
and fixing the steering lamp module on the inner surface of the red mask to obtain the automobile tail lamp.
Preferably, one or more of a rear position lamp module, a brake lamp module, a backup lamp module and a rear fog lamp module are respectively prepared according to the preparation method of the turn lamp module; and fixing the steering lamp module and one or more of the rear position lamp module, the brake lamp module, the reversing lamp module and the rear fog lamp module on the inner surface of the red mask to obtain the automobile tail lamp.
The invention also provides another preparation method of the automobile tail lamp, which comprises the following steps:
the red mask is used as a substrate, and an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer are sequentially deposited on the inner surface of the red mask to obtain the turn light module, namely the automobile tail light.
Preferably, the inner surface of the red mask is divided into a plurality of light module areas, and a turn light module is prepared in one area;
according to the preparation method of the turn light module, one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module are respectively prepared in other light module areas to obtain the automobile tail light.
The invention provides an OLED-based automobile tail lamp, which comprises a red face mask and a light module arranged on the inner surface of the red face mask; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the light-emitting wavelength of the turn light module is 570-590 nm. According to the invention, the OLED is used as a light source of the light module, wherein the light-emitting spectrum of the OLED is determined by the light-emitting material in the light-emitting layer, different functional groups of the light-emitting material can determine the forbidden band width of a semiconductor, and different forbidden band widths can cause different emission peaks, so that the light-emitting wavelength of the turn light module is controlled to be 570-590 nm by adjusting the functional groups of the OLED light-emitting material, and the light with the wavelength still shows yellow light after penetrating through the red mask, thereby meeting the national regulation requirements; meanwhile, the appearance of the automobile tail lamp with the full red face shield is more fashionable and attractive.
The invention also provides another automobile tail lamp based on the OLED, which comprises a lamp module; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the substrate is a red mask; the light-emitting wavelength of the turn light module is 570-590 nm. By adopting the automobile tail lamp, the purpose that the steering lamp emits yellow light through the red mask can be realized, the preparation process can be simplified, and the raw material cost can be saved.
The invention also provides two preparation methods of the automobile tail lamp, wherein the OLED can be prepared firstly, and then the OLED is fixed in the red mask; deposition can also be performed directly with a red mask substrate, resulting in an OLED comprising a red mask. The preparation method provided by the invention has the advantages of simple process, low production cost and suitability for industrial large-scale application, and can be completed by adopting conventional equipment.
Drawings
FIG. 1 is a graph of the absorption spectra of four red plastic parts known in the prior art; wherein the red plastic piece 1 is acrylic 461, the red plastic piece 2 is acrylic 756, the red plastic piece 3 is acrylic 18292, and the red plastic piece 4 is acrylic 28247;
fig. 2 is a schematic structural view of each light module in the automobile tail light prepared in embodiment 1 of the present invention.
Detailed Description
The invention provides an OLED-based automobile tail lamp, which comprises a red face mask and a light module arranged on the inner surface of the red face mask; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the light-emitting wavelength of the turn light module is 570-590 nm.
The invention also provides another automobile tail lamp based on the OLED, which comprises a lamp module; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the substrate is a red mask; the light-emitting wavelength of the turn light module is 570-590 nm;
the automobile tail lamp comprises the red face cover, and the full red face cover is used as the outer cover of the automobile tail lamp, so that the attractiveness of the automobile tail lamp can be improved. The specific composition of the red mask is not particularly limited, and the red mask can be used. In an embodiment of the present invention, the red mask is made of plastic or glass. In the present invention, the light transmittance of the red mask is preferably 75 to 85%.
According to the invention, the light source of the turn light module is an OLED, the OLED is adopted as the light source of the turn light module, the light-emitting wavelength of the turn light module is controlled to be 570-590 nm by adjusting the functional group of the OLED light-emitting material, and the light color of the turn light is still yellow on the premise of using the red mask.
In the invention, the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked. In the invention, the light-emitting wavelength of the turn light module is 570-590 nm, and the light-emitting material adopted in the turn light module is preferably an organic yellow material, specifically EPY 10.
In the invention, the light module taking the OLED as the light source preferably further comprises one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module; the rear position light module, the brake light module and the turn light module are preferably installed as an assembly; the backup lamp module and the rear fog lamp module are preferably installed as independent assemblies respectively. In a specific embodiment of the present invention, the rear position light module, the brake light module and the turn light module are used frequently and are generally installed as an assembly at a position above the bumper; the backup light module and the rear fog light module are used less frequently and are generally installed as separate assemblies under the bumper.
In the invention, the light-emitting wavelength of the rear position lamp module is preferably 620-700 nm, and the light-emitting material adopted by the rear position lamp module is preferably an organic red material, specifically PER 53.
In the invention, the light-emitting wavelength of the brake lamp module is preferably 620-700 nm, and the light-emitting material adopted by the brake lamp module is preferably an organic red material, specifically PER 53.
In the invention, the light emitting color of the reversing light module is preferably white light, and the light emitting form adopted by the reversing light module is blue light matched with yellow light or red, green and blue three primary colors;
in the invention, the light-emitting color of the rear fog lamp module is white light or yellow light, and when the rear fog lamp emits white light, the adopted light-emitting form is blue light matched with yellow light or red, green and blue three primary colors; when the rear fog lamp emits yellow light, the luminescent material adopted by the module is preferably EPY 10.
In the invention, the red mask can be used as an independent mask except for the OLED and can also be used as a substrate of the OLED, and in the specific embodiment of the invention, the red mask is preferably used as the substrate of the OLED, so that the production cost is saved. In the present invention, it is preferable that the same red mask is used as a substrate, and the rear position light module, the brake light module and the turn light module are simultaneously disposed on the red mask, that is, the rear position light module, the brake light module and the turn light module share the same red mask substrate.
The invention also provides a preparation method of the automobile tail lamp, which comprises the following steps:
depositing an anode layer, a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, an electron injection layer and a cathode layer on the surface of the substrate in sequence to obtain a steering lamp module;
and fixing the steering lamp module on the inner surface of the red mask to obtain the automobile tail lamp.
The invention sequentially deposits an anode layer, a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, an electron injection layer and a cathode layer on the surface of a substrate to obtain the steering lamp module. In the present invention, the substrate is preferably a red glass substrate. In the present invention, before depositing an anode layer on the surface of the substrate, the substrate is preferably pretreated, and the pretreatment specifically includes: sequentially soaking the substrate in acetone, water and isopropanol, and respectively carrying out ultrasonic treatment for 30min to remove impurities and an oxidation layer on the surface of the substrate; the water is preferably deionized water.
According to the invention, an anode layer is deposited on the surface of a substrate, and the thickness of the anode layer is preferably 120-150 nm; the anode layer is preferably an ITO layer. In the invention, the deposition method of the anode layer is preferably magnetron sputtering deposition, and the invention has no special limitation on the specific parameters of the magnetron sputtering deposition, and ITO is taken as a target material, and the magnetron sputtering deposition method known in the field can be adopted. In the invention, an ITO layer with a regular shape is sputtered on the surface of the substrate preferably in the form of a mask so as to adapt to the decoration requirement of the automobile tail lamp.
After the anode layer is obtained, the invention deposits a hole injection layer on the surface of the anode layer. In the invention, the thickness of the hole injection layer is preferably 10-80 nm; the material of the hole injection layer is preferably NPB. In the present invention, the deposition method of the hole injection layer is preferably vacuum evaporation, and the specific parameters of the vacuum evaporation are not particularly limited, and a vacuum evaporation method known in the art may be used. In the embodiment of the present invention, the vacuum degree of the vacuum evaporation is preferably more than 10-3Pa。
After the hole injection layer is obtained, the hole transport layer is deposited on the surface of the hole injection layer. In the invention, the thickness of the hole transport layer is preferably 20-60 nm; the material of the hole transport layer is preferably NPB. In the present invention, the deposition method of the hole transport layer is preferably vacuum evaporation, and the specific parameters of the vacuum evaporation are not particularly limited in the present invention, and a vacuum evaporation method known in the art may be used. In the embodiment of the present invention, the vacuum degree of the vacuum evaporation is preferably more than 10-3Pa。
In the embodiment of the present invention, the materials of the hole transport layer and the hole injection layer are preferably the same, and the hole injection/transport layer is obtained by one-step deposition.
After the hole transport layer is obtained, the invention deposits a luminescent layer on the surface of the hole transport layer. In the invention, the thickness of the luminescent layer is preferably 20-90 nm, and more preferably 20-30 nm; the material of the light-emitting layer is preferably an organic red material and/or an organic yellow material. In the invention, the deposition method of the light-emitting layer is preferably vacuum evaporation, and more preferably vacuum mask evaporation; the vacuum degree of vacuum mask evaporation is preferably more than 10-3Pa。
After the luminescent layer is obtained, the invention deposits the electron transport layer on the surface of the luminescent layer. In the invention, the thickness of the electron transport layer is preferably 30-50 nm; the material of the electron transport layer is preferably TPBi. In the present invention, the deposition method of the electron transport layer is preferably vacuum evaporation, and the specific parameters of the vacuum evaporation are not particularly limited, and a vacuum evaporation method known in the art may be used. In the embodiment of the present invention, the vacuum degree of the vacuum evaporation is preferably more than 10-3Pa。
After the electron transport layer is obtained, an electron injection layer is deposited on the surface of the electron transport layer. In the invention, the thickness of the electron injection layer is preferably 0.5-1 nm; the material of the electron injection layer is preferably LiF. In the present invention, the deposition method of the electron injection layer is preferably vacuum evaporation, and the specific parameters of the vacuum evaporation are not particularly limited, and a vacuum evaporation method known in the art may be used. In the embodiment of the present invention, the vacuum degree of the vacuum evaporation is preferably more than 10-3Pa。
After the electron injection layer is obtained, a cathode layer is deposited on the surface of the electron injection layer. In the invention, the thickness of the cathode layer is preferably 100-300 nm; the material of the cathode layer is preferably aluminium. In the present invention, the deposition method of the cathode layer is preferably vacuum evaporation, and specific parameters of the vacuum evaporation are not particularly limited in the present invention, and a vacuum evaporation method known in the art may be used. In the embodiment of the present invention, the vacuum degree of the vacuum evaporation is preferably more than 10-3Pa。
After the cathode layer is obtained, the substrate, and the anode layer, the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer and the cathode layer deposited on the surface of the substrate are preferably encapsulated to obtain the OLED, namely each light module. The method of encapsulation is not particularly limited in the present invention, and the encapsulation method known in the art may be used.
After the turn light module is obtained, the turn light module is fixed on the inner surface of the red mask to obtain the automobile tail light.
In the present invention, when the light module further includes one or more of a rear position light module, a brake light module, a backup light module, and a rear fog light module, the preparation methods of the rear position light module, the brake light module, the backup light module, and the rear fog light module are substantially the same as the preparation method of the turn light module, and are not described herein again. The invention preferably fixes the steering lamp module and one or more of the rear position lamp module, the brake lamp module, the reversing lamp module and the rear fog lamp module on the inner surface of the red mask to obtain the automobile tail lamp.
As an embodiment of the present invention, the present invention can realize the preparation of a plurality of lamp modules on the same substrate by using vacuum mask evaporation. In the specific embodiment of the present invention, when the rear position light module, the brake light module and the turn light module are on the same substrate, and after the anode layer, the hole injection layer and the hole transport layer are deposited on the substrate, the substrate obtained by the present invention is divided into three regions, the middle is the turn light module, and the two sides are the rear position light module and the brake light module respectively, as shown in fig. 2, region 1 represents the substrate on which the anode layer, the hole injection layer and the hole transport layer are deposited, region 2 represents the rear position light module, region 4 represents the turn light module, and region 3 represents the brake light module; the deposition method of the light emitting layer is preferably: covering the 4 regions by adopting a shielding plate to ensure that the 4 regions can not be evaporated with any material, and evaporating organic red materials in the 2 regions and the 3 regions in a vacuum manner; covering the area 2 and the area 3 by adopting a shielding plate, ensuring that the area 2 and the area 3 cannot be evaporated with any material, and evaporating an organic yellow material in the area 4 in a vacuum manner; and then depositing an electron transport layer, an electron injection layer and a cathode layer on the surface of the light-emitting layer in sequence, and packaging to obtain the light module.
The invention also provides another preparation method of the automobile tail lamp, which comprises the following steps:
the red mask is used as a substrate, and an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer are sequentially deposited on the inner surface of the red mask to obtain the turn light module, namely the automobile tail light.
In the present invention, the pretreatment process of the red mask as the substrate is the same as the pretreatment process of the substrate, and is not described herein again. In the present invention, the deposition methods of the anode layer, the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer and the cathode layer are the same as those described above, and are not described herein again.
In the invention, when the light module further comprises one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module, the inner surface of the red mask is preferably divided into a plurality of light module areas, and a turn light module is prepared in one area; according to the preparation method of the turn light module, one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module are respectively prepared in other light module areas and packaged to obtain the automobile tail light.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The automobile tail light provided by the embodiment is shown in fig. 2;
selecting a red PET substrate 1, sequentially soaking the red PET substrate 1 in acetone, deionized water and isopropanol, respectively carrying out ultrasonic treatment for 30min, taking out the red PET substrate, and baking the red PET substrate for 10min under an infrared lamp until the surface of the substrate 1 is dried;
placing a substrate 1 in a magnetron sputtering cavity, wherein a target material is ITO, and sputtering an ITO electrode with a regular shape on the surface of the substrate in a mask mode to be used as an anode of an OLED (organic light emitting diode);
transferring the substrate 1 with the anode into a vacuum evaporation cavity, and starting to prepare a functional layer in a vacuum mask evaporation mode;
firstly, evaporating NPB as a hole injection/transport layer;
the shielding plate is pulled to 4 areas to ensure that no material is evaporated in the 4 areas, and light emitting layers with CBP as a main body and red phosphor Ir (with the wavelength of 620-700 nm) as an object are evaporated in the 2 areas and the 3 areas;
the shielding plate is pulled to the 2 area and the 3 area, so that the 2 area and the 3 area can not be evaporated with any material, and a light emitting layer with a CBP main body and Ir (a phosphorescent material with the wavelength of 570-590 nm) object is evaporated in the 4 area;
removing the shielding plate, and evaporating TPBi to be used as an electron transmission layer;
continuously evaporating LiF to be used as an electron injection layer;
finally, evaporating an aluminum electrode to be used as an OLED cathode;
after packaging, obtaining the automobile tail lamp; the automobile tail lamp provided by the embodiment can realize the installation of the position lamp, the brake lamp and the steering lamp on the same red mask substrate.
In a specific use process, when the 2 area is driven to be lightened by 3.5V voltage, the position lamp is used; when the 4 area is driven to light by 4V voltage, the lamp is a turn light; when the 3-region driven by the voltage of 4.5V is lighted, the brake lamp is used.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An OLED-based automobile tail lamp comprises a red face mask and a light module arranged on the inner surface of the red face mask; the light source of the light module is an OLED;
the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked, and the substrate side of the turn light module is fixed in the red mask; the light-emitting wavelength of the turn light module is 570-590 nm.
2. An OLED-based automobile tail light comprises a light module; the light source of the light module is an OLED; the light module comprises a steering light module; the turn light module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially stacked; the substrate is a red mask; the light-emitting wavelength of the turn light module is 570-590 nm.
3. The automobile tail light according to claim 1 or 2, characterized in that the light emitting material of the light emitting layer is independently a fluorescent material and/or a phosphorescent material.
4. The automobile tail light of claim 1 or 2, characterized in that the light module further comprises one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module.
5. The automobile tail light according to claim 4, characterized in that the light emitting wavelength of the rear position light module is 620-700 nm; the light-emitting wavelength of the brake lamp module is 620-700 nm; the light emitting color of the reversing lamp module is white light; the light-emitting wavelength of the rear fog lamp module is 570-590 nm.
6. The automobile tail light of claim 1 or 2, characterized in that the material of the red cover is plastic or glass.
7. A method for producing an automobile tail light as set forth in any one of claims 1 or 3 to 6, characterized by comprising the steps of:
depositing an anode layer, a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, an electron injection layer and a cathode layer on the surface of the substrate in sequence to obtain a steering lamp module;
and fixing the substrate side of the steering lamp module on the inner surface of the red mask to obtain the automobile tail lamp.
8. The manufacturing method according to claim 7, wherein one or more of a rear position lamp module, a brake lamp module, a backup lamp module, and a rear fog lamp module are respectively manufactured according to the manufacturing method of the turn lamp module; and fixing the steering lamp module and one or more of the rear position lamp module, the brake lamp module, the reversing lamp module and the rear fog lamp module on the inner surface of the red mask to obtain the automobile tail lamp.
9. A method for producing an automobile tail light as set forth in any one of claims 2 or 3 to 6, characterized by comprising the steps of:
and taking the red mask as a substrate, and sequentially depositing an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer on the inner surface of the red mask to obtain the automobile tail lamp.
10. The method of manufacturing of claim 9, wherein the inner surface of the red mask is divided into a plurality of light module areas, and a turn light module is manufactured in one of the areas;
according to the preparation method of the turn light module, one or more of a rear position light module, a brake light module, a backup light module and a rear fog light module are respectively prepared in other light module areas to obtain the automobile tail light.
CN201911341435.1A 2019-12-24 2019-12-24 Automobile tail lamp based on OLED and preparation method thereof Pending CN111059512A (en)

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Application publication date: 20200424