CN112782898A - Intelligent color-changing display device and preparation method thereof - Google Patents
Intelligent color-changing display device and preparation method thereof Download PDFInfo
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- G—PHYSICS
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G02F1/1514—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The invention discloses an intelligent color-changing display device, which comprises a substrate, an electrochromic device, an organic light-emitting diode display device, a photosensitive module and a control unit, wherein the electrochromic device is arranged on the substrate; the substrate comprises a first substrate and a second substrate, the electrochromic device and the organic light emitting diode display device are positioned between the first substrate and the second substrate, and the electrochromic device and the organic light emitting diode display device are sequentially arranged on the first substrate; the electrochromic device and the organic light emitting diode display device are respectively electrically connected with the control unit, and the control unit is electrically connected with the photosensitive module. The invention has the technical effects that: the intelligent color-changing display device has the functions of anti-dazzle and ultraviolet blocking, and can adjust light change and various colors.
Description
Technical Field
The invention relates to the field of electrochromism, in particular to an intelligent color-changing display device and a preparation method thereof.
Background
Electrochromism refers to a phenomenon in which optical properties (reflectivity, transmittance, absorption, etc.) undergo a stable, reversible color change under the action of an applied electric field. Electrochromic technology has been developed for more than forty years, and Electrochromic devices (ECDs) have wide application prospects in the fields of intelligent windows, displays, spacecraft temperature control modulation, automobile no-glare rearview mirrors, weapon equipment stealth and the like due to the characteristics of continuous adjustability of transmitted light intensity, low energy loss, open-circuit memory function and the like. With the continuous improvement of the requirements of human beings on consumer products, the ECD shows huge market prospects and application values in the fields of automobiles, home appliances, aerospace, rail transit, green buildings and the like, and electrochromic products attract more and more extensive attention and attention at home and abroad and are a new generation of high-efficiency building energy-saving products after heat-absorbing glass, heat-reflecting coated glass and low-radiation glass.
At present, the conventional transparent display glass has been widely used, but at present, especially outdoors, the display brightness is not enough due to the direct light, and in addition, the color developed cannot achieve high fidelity, and the dual functions of high transparency and complete non-transparency cannot be realized. Although the display contrast can be tried to be changed by using the electrochromic glass according to the direct light intensity of light, the electrochromic device can only realize the direct regulation from blue black to a transparent state, cannot adjust the color of the color change, and has certain limitation in application.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is how to automatically adjust the contrast of the electrochromic transparent display screen according to the intensity of light.
In order to achieve the above object, the present invention provides an intelligent color-changing display device, which comprises a substrate, an electrochromic device, an organic light emitting diode display device, a photosensitive module and a control unit; the substrate comprises a first substrate and a second substrate, the electrochromic device and the organic light emitting diode display device are positioned between the first substrate and the second substrate, and the electrochromic device and the organic light emitting diode display device are sequentially arranged on the first substrate; the electrochromic device and the organic light emitting diode display device are respectively electrically connected with the control unit, and the control unit is electrically connected with the photosensitive module.
Further, the control unit includes a first driving unit electrically connected to the electrochromic device and a second driving unit connected to the organic light emitting diode display device.
Further, a touch control film is pasted on the outer surface of the substrate.
Further, the electrochromic device comprises a first electrochromic unit and a second electrochromic unit, and the organic light emitting diode display device is positioned between the first electrochromic unit and the second electrochromic unit.
Further, the organic light emitting diode display device and the second substrate further include: and (7) packaging the layer.
Further, the material of the encapsulation layer is selected from at least one of the following materials: nb oxide, Si oxide, Ti oxide, CrNi oxide, Zr oxide.
Further, the electrochromic device sequentially comprises a first conducting layer, an electrochromic lamination and a second conducting layer from the first substrate, wherein the electrochromic lamination comprises an electrochromic layer, an ion transmission layer and an ion storage layer; the organic light emitting diode display device and the electrochromic device share the second conducting layer, the organic light emitting diode display device sequentially comprises an organic light emitting diode lamination layer and a third conducting layer from the second conducting layer, and the organic light emitting diode lamination layer sequentially comprises an ET electron transport layer, an organic display layer and an HIT hole injection layer from the second conducting layer.
Further, the electrochromic layer includes a cathodic electrochromic material and the ion storage layer includes an anodic electrochromic material.
Further, the electrochromic layer and the ion storage layer comprise nitrogen.
Further, the cathodic coloring material is selected from the group consisting of: tungsten oxynitride, molybdenum oxynitride, niobium oxynitride, titanium oxynitride, tantalum oxynitride; the anodic coloring material is selected from the group consisting of: nickel oxynitride, iridium oxynitride, manganese oxynitride, cobalt oxynitride, tungsten nickel oxynitride, tungsten iridium oxynitride, tungsten manganese oxynitride, tungsten cobalt oxynitride.
Further, the control unit comprises a feedback integrated circuit, an electrochromic control chip, a circuit board, a capacitor and a switch.
Further, the inner surface of the substrate comprises an engraved groove, the depth of the engraved groove is smaller than the thickness of the substrate, and the control unit is located in the engraved groove.
The invention also provides a preparation method of the intelligent color-changing display device, which comprises the following steps: the method comprises the steps of sequentially arranging an electrochromic device and an OLED display device between a first substrate and a second substrate, electrically connecting the electrochromic device and the OLED display device with a control unit respectively, and electrically connecting the control unit with a photosensitive module.
Further, the preparation method comprises the following steps: sequentially forming a first conductive layer, an electrochromic layer, an ion transmission layer, an ion storage layer, a second conductive layer, a third conductive layer, an electron transport layer, an organic display layer and a hole injection layer on the surface of the first substrate; and a step of forming an electrode on the inner surface of the substrate.
Further, the preparation method also comprises the step of forming an encapsulation layer on the surface of the hole injection layer.
Further, the preparation method further comprises the step of forming a touch film on the surface of the substrate.
The invention has the technical effects that: the intelligent color-changing display device not only has the functions of anti-dazzle, ultraviolet blocking and the like, but also has the functions of adjusting light change and changing various colors, and realizes the intelligent control of various aspects such as color change, display, external light and the like through the integrated photosensitive element. In addition, the intelligent color-changing display device has great reliability on electrochromism and organic display after adopting organic packaging, and the electrochromism can have variability through the adjustment of organic materials.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of another embodiment of the present invention.
Description of reference numerals: 100-a first substrate; 200-a second substrate; 105-a first conductive layer; 110-an electrochromic stack; 115-a second conductive layer; 120-organic light emitting diode stack; 125-a third conductive layer; 130-an encapsulation layer; 135-edge sealing material; 140-a cavity; 300-a control unit; 301-a first drive unit; 302-a second drive unit; 400-a photosensitive module; 501-a first electrode; 502-a second electrode; 503-a third electrode; 600-grooving.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, the intelligent color-changing display device according to an embodiment of the present invention includes a substrate, an electrochromic device, an Organic Light-Emitting Diode display device (hereinafter, referred to as an OLED (Organic Light-Emitting Diode) display device), a photosensitive module 400, and a control unit 300. The substrate comprises a first substrate 100 and a second substrate 200, the electrochromic device and the OLED display device are located between the first substrate 100 and the second substrate 200, the electrochromic device and the OLED display device are sequentially arranged on the first substrate 100, the electrochromic device and the OLED display device are respectively electrically connected with a control unit 300, and the control unit 300 is electrically connected with the photosensitive module 400.
The photosensitive module 400 may be disposed on an outer surface of the first substrate 100 or the second substrate 200, or may be disposed on an inner surface, i.e., inside between the substrates, or may be disposed independently, so that the photosensitive module 400 may sense light.
Further, the electrochromic device comprises a first conductive layer 105, an electrochromic stack 110 and a second conductive layer 115 in sequence from the first substrate 100, wherein the electrochromic stack 110 comprises an electrochromic layer, an ion transport layer and an ion storage layer. The OLED display device shares the second conductive layer 115 with the electrochromic device, and includes an organic light emitting diode stack 120 and a third conductive layer 125 in this order from the second conductive layer 115. The organic light emitting diode stack 120 includes an Electron Transport (ET) layer, an organic display layer, and a hit (hole Injection) hole Injection layer in sequence from bottom to top.
The electron transport layer is for recombination of electrons and holes injected from the electrode to occur in the light emitting layer; common electron transport layer materials are Alq3, Almq3, DVPBi, TAZ, OXD, PBD, BND, PV, etc.
The organic display layer is used for providing luminescence and has enough luminous efficiency; common organic display layer materials are Alq3, Almq3, Blue, TBADN, and the like.
The hole injection layer is used for reducing a barrier for injecting holes from the anode, so that the holes can be effectively injected into the OLED device from the anode; common hole injection layer materials include CuPc (polyester carbonate), TiOPc, m-MTDATA, 2-TNATA, and the like.
The first conductive layer 105, the second conductive layer 115, and the third conductive layer 125 each include an electrode thereon for connecting with the first driving unit 301 and the second driving unit 302, respectively. The first electrode 501 on the first conductive layer 105 and the second electrode 502 on the second conductive layer 115 are electrically connected to the first driving unit 301, and the first driving unit 301 is used for controlling a voltage to enable the electrochromic device to generate a color change effect. The second electrode 502 is electrically connected to the second driving unit 302 in common with the third electrode 503 on the third conductive layer 125 for controlling the brightness of the OLED display device.
Further, the control unit 300 includes a first driving unit 301 and a second driving unit 302, the first driving unit 301 is electrically connected to the electrochromic device, and the second driving unit 302 is connected to the OLED display device. Wherein the first driving unit 301 is used to control the coloring rate of the electrochromic device and the second driving unit 302 is used to control the brightness of the OLED display device. When the photosensor 400 is irradiated by sunlight, the photosensor 400 quantitatively converts the light signal into a light intensity signal and transmits the light intensity signal to the control unit 300. After receiving the light intensity signal, the control unit 300 instructs the first driving unit 301 and the second driving unit 302 to change the voltage according to the intensity of the light intensity signal to adjust the coloring rate of the electrochromic device and the brightness of the OLED display device, so that the electrochromic display device according to the present invention achieves the best display effect under illumination. Generally, during the use of the intelligent color-changing display device, the side of the electrochromic device should face light, because the display material in the OLED display device is decomposed during the ultraviolet irradiation or temperature rise, which affects the service life. When one side of the electrochromic device faces outwards, the electrochromic device can achieve the effects of insulating heat and blocking harmful rays, protect the OLED display device and further prevent glare. In addition, the photosensitive module 400 can be additionally provided with a temperature sensing unit, so that the coloring rate of the electrochromic device can be further adjusted according to the actual temperature, and the heat insulation efficiency is maximized.
Further, the electrochromic device includes a first electrochromic unit and a second electrochromic unit, and the OLED display device is located between the first electrochromic unit and the second electrochromic unit.
The OLED display device is enclosed between two electrochromic cells, and can be applied to an outer window glass, and when the electrochromic cell of the outer layer is used for heat insulation and harmful ray blocking, the electrochromic cell of the inner layer can further reduce light transmittance, and reduce the risk of light transmission points on a substrate due to manufacturing defects during the preparation of the electrochromic device (such as an outdoor OLED advertisement display screen and a zenith OLED advertisement display screen). The first electrochromic unit and the second electrochromic unit respectively comprise independent electrochromic lamination and conductive layers, and can be controlled by a unified driving unit or controlled by respective driving units.
Further, an encapsulation layer 130 is further included between the OLED display device and the second substrate. The encapsulation layer 130 may adjust the color of the smart color changing display device.
Further, the material of the encapsulation layer is selected from at least one of the following materials: an oxide (a transparent oxide material having an optical refractive index) formed of a material such as Nb, Si, Ti, CrNi, or Zr.
Further, a Touch pad (Touch Panel) is attached to an outer surface of the substrate. The touch film is a film which can realize touch control to control the display screen, is similar to the touch effect, and can only control the display screen through a mouse and a keyboard if no touch film is available.
After the touch control film is pasted, the intelligent touch control function of the intelligent color-changing display device can be realized. In one embodiment, the intelligent glass with the intelligent color-changing display device can directly replace a conventional externally-connected control button or an unlocking controller. The user can directly operate on the intelligent glass to unlock or adjust the brightness of the glass. For example, after an intelligent color-changing display device is introduced into a window of a vehicle and a control unit is connected with each control component, a user can directly unlock and start the vehicle through the device. In addition, the control panel can be visually displayed to a user through the OLED display device, so that the user can visually slide on the window with the intelligent color-changing display device, and the whole brightness of the window can be regulated and controlled.
Further, the electrochromic layers in the electrochromic stack 110 comprise a cathodic electrochromic material and the ion storage layer comprises an anodic electrochromic material. For example, the electrochromic layer may employ a cathodically coloring material, such as tungsten oxide; the ion storage layer may employ an anodic coloring material such as nickel oxide. That is, after lithium ions are separated from the ion storage layer, the ion storage layer also enters a colored state. Thereby, the electrochromic layer and the ion storage layer are combined and together reduce the amount of light transmitted through the stack.
Further, the electrochromic layer and the ion storage layer comprise nitrogen.
The electrochromic layer can be coated with a polycrystalline metal oxynitride film with a thickness of 150-650 nm, and the material used specifically comprises tungsten oxynitride (WO)xNy) Molybdenum oxynitride (MoO)xNy) Niobium oxynitride (NbO)xNy) Titanium oxynitride (TiO)xNy) Tantalum oxynitride (TaO)xNy) Depending on the nitrogen content, the parameters x and y vary accordingly. The molar number of nitrogen atoms in the electrochromic layer 110 is generally 0.05% to 20%, or 0.5% to 5%, or 0.5% to 10% of the total atomic molar number. Generally, the content of nitrogen exceeds 20%, the color of the deposited coating film can be deepened, which is caused by the color of the metal oxynitride, and the deepening of the color of the coating film can influence the light transmittance of the electrochromic glass in a fading state, so that the color change range of a finished device is reduced.
After metal oxide used by a conventional electrochromic layer is replaced by metal oxynitride, according to the difference of nitrogen content, nitrogen ions can replace oxygen ions in the original metal oxide, for example, tungsten is taken as an example, original W-O ionic bonds are partially replaced by W-N ionic bonds, so that the asymmetry of crystal lattices is caused, the acting force balance among original ions is destroyed, adjacent atoms deviate from the balance position, and the crystal distortion is caused. After the crystal is distorted, the interaction around the ion transport channel is reduced, thereby increasing the ion transport speed of the electrochromic layer. The nitrogen element is taken as a relatively stable element, and the stability of the metal compound is not affected by the introduction of the nitrogen element, so that the good stability is still maintained.
Similar to the electrochromic layer, the ion storage layer has a film thickness of 150 to 650nm and is selected from nickel oxynitride (NiO)xNy) Iridium oxynitride (IrO)xNy) Manganese oxynitride (MnO)xNy) Cobalt oxynitride (CoO)xNy) Tungsten nickel oxynitride (WNi)zOxNy) Iridium tungsten oxynitride (WIr)zOxNy) Tungsten manganese oxynitride (WMn)zOxNy) Tungsten-cobalt oxynitride (WCo)zOxNy) The mole number of nitrogen atoms in the film layer accounts for about 0.05 to 15 percent of the whole mole number of atoms. Nitrogen is further introduced into the conventional ion storage layer 120 to convert the conventional nickel oxide, iridium oxide material into nickel oxynitride, iridium oxynitride or cobalt oxynitride material, thereby improving the stability of the device during the color degradation due to the higher binding energy of the nitride relative to the oxide.
Further, the control unit 300 includes: the device comprises a feedback Integrated Circuit (IC), an electrochromic control chip, a circuit board, a capacitor, a switch, a voltage reduction module, a constant voltage and constant current unit, a nixie tube and the like.
When the intelligent color-changing display device is actually applied, the photosensitive module 400 receives illumination, quantizes ultraviolet rays and temperature in the illumination and converts the ultraviolet rays and the temperature into digital signals, and transmits the digital signals to the feedback integrated circuit module in the control unit 300, and then the feedback integrated circuit module corresponds to a preset voltage output relation according to the digital signals and instructs the first driving unit 301 and the second driving unit 302 to adjust output voltage, so that the coloring rate of the electrochromic device and the brightness of the OLED display device are adjusted, and the intelligent color-changing display device achieves the optimal display effect under a certain ambient illumination degree. Generally, the quantized ultraviolet light and temperature have a linear relationship with the output voltage, and the stronger the ultraviolet light, the higher the outside temperature, the deeper the coloring depth, and the higher the voltage.
Further, still include: the groove 600, the groove 600 is located on the inner surface of the substrate, the depth of the groove is smaller than the thickness of the substrate, and the control unit is located in the groove 600.
As shown in fig. 2, the notch 600 is located on the second substrate 200 in this embodiment. Certainly, the notch 600 may also be located on the first substrate 100, the number of the notch 600 is not limited, and only the requirement that the wiring of the electrochromic device and the OLED display device is optimized is met, the first driving unit 301 and the second driving unit 302 may be placed inside the notch 600, the control unit 300 may be placed outside the intelligent electrochromic display device according to actual needs, or may be placed in the notch together with the first driving unit 301 and the second driving unit 302, which is not limited herein. After the control unit 300 is placed in the notch 600, the actual volume of the intelligent color-changing display device can be reduced, the redundancy degree of the circuit is simplified, the overall appearance is improved, and the steps of wiring and arranging wires are omitted during actual use.
Further, the notch 600 includes a drying body for adsorbing moisture generated in the environment and between the substrates, so as to improve the lifetime and reliability of the electrochromic glass.
The preparation method of the intelligent color-changing display device provided by the embodiment of the invention comprises the following steps of: a step of sequentially disposing an electrochromic device and an OLED display device between the first substrate 100 and the second substrate 200, a step of electrically connecting the electrochromic device and the OLED display device to the control unit 300, respectively, and a step of electrically connecting the control unit 300 to the photosensitive module 400.
The preparation method preferably comprises the following steps:
(1) a step of forming a first conductive layer 105 on the surface of the first substrate 100; for example, a transparent conductive film with a film thickness of 20 nm-400 nm is formed on the surface of a glass substrate (first substrate 100) by adopting a vacuum coating process, and the transparent conductive film is made of ITO (indium tin oxide), so that a first outer ITO transparent conductive film layer (first conductive layer 105) is formed on the outer surface of the substrate;
(2) a step of forming an electrochromic layer on a surface of the first conductive layer 105; for example, metal tungsten is used as a target material, oxygen is used as a working gas, the oxygen doping proportion is 0.5% -20%, an electrochromic layer with the thickness of 300 nm-600 nm is formed on the surface of the first outer ITO transparent conductive film layer (the first conductive layer 105) by adopting a reactive magnetron sputtering method, or tungsten oxide is used as a target material and is directly sputtered on the surface of the first outer ITO transparent conductive film layer (the first conductive layer 105) to form the electrochromic layer with the thickness of 300 nm-600 nm;
(3) a step of forming an ion transport layer on the surface of the electrochromic layer; for example, a layer of metal lithium/lithium compound ion thin film with the thickness of 10 nm-300 nm is formed on the surface of the electrochromic layer by adopting a vacuum coating mode, and then an ion transmission layer is formed;
(4) a step of forming an ion storage layer on the surface of the ion transport layer; for example, metal nickel is used as a target material, oxygen is used as a working gas, the oxygen doping proportion is 0.5% -20%, an ion storage layer with the thickness of 150 nm-350 nm is formed on the surface of the ion transmission layer by adopting a reactive magnetron sputtering method, or nickel oxide is used as a target material and is directly sputtered on the surface of the ion transmission layer to form an ion storage layer with the thickness of 150 nm-350 nm;
(5) a step of forming a second conductive layer 115 on the surface of the ion storage layer; for example, a transparent conductive film with the thickness of 20 nm-400 nm is formed on the surface of the ion storage layer by adopting a vacuum coating process, and the material of the transparent conductive film is ITO/AZO/GZO and the like, so that a second transparent conductive film layer (a second conductive layer 115) is formed on the surface of the ion storage layer;
(6) forming an electrode on an inner surface of a substrate; for example, a transparent metal conductive film (electrode) with a film thickness of 5 nm-20 nm is formed on the inner surface of the substrate by adopting a vacuum coating process, and metal materials such as metal Al, Ag, Cu and the like are selected;
(7) a step of forming a third conductive layer 125 on the surface of the ion storage layer; for example, a transparent conductive film with a film thickness of 20nm to 100nm is formed on the surface of the ion storage layer by adopting a vacuum coating process, and the transparent conductive film is made of ITO (indium tin oxide)/AZO (aluminum zinc oxide)/GZO (gallium zinc oxide) and the like, so that a third transparent conductive film layer (a third conductive layer 125) is formed on the surface of the ion storage layer;
(8) a step of forming an electron transport layer on the surface of the third conductive layer 125; for example, an electron transport layer capable of allowing recombination of electrons and holes injected from an electrode to occur in the light emitting layer is formed on the surface of the third transparent conductive film layer (third conductive layer 125) by an evaporation coating process, and examples of the electron transport layer ET include Alq3, Almq3, PBD, BND, and PV;
(9) a step of forming an organic display layer on the surface of the electron transport layer ET; for example, an organic display film (organic display layer) with strong fluorescence in a solid state, good electron/hole transport performance, good thermal and chemical stability, and high quantum efficiency is formed on the surface of an electron transport layer ET by an evaporation coating process, and can be generally divided into organic small-molecule luminescent materials and complex luminescent materials, which can generate emission peaks of various colors such as red, green, blue, yellow, and the like, Alq3 is widely used for green light, and Balq and DPVBi are widely used for blue light;
(10) a step of forming a hole injection layer on the surface of the organic display layer; for example, an evaporation coating process is adopted to form a barrier on the surface of the organic display layer to reduce the hole injection from the anode, so that holes can be effectively injected into the OLED device from the anode, and the hole injection layer (HIT) is made of materials such as CuPc (polyester carbonate), TiOPc, m-MTDATA, 2-TNATA and the like.
Further preferably, the method further comprises the following steps:
(11) a step of forming an encapsulation layer 130 on a surface of a hole injection layer (HIT); for example, a magnetron sputtering coating process is used to form the encapsulation layer 130 on the surface of the hole injection layer (HIT), and the common encapsulation thin film materials include: optically transparent oxide materials such as SiOx, TiOx, NbOx, ZrOx, and the like.
Further preferably, the method further comprises the following steps:
(12) forming a touch film on the surface of the substrate; for example, a touch film (touch film) having a thickness of 100nm to 400nm is bonded to glass (substrate) by bonding or vacuum adhesion
On the surface, a control pattern having a touch function is formed.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (16)
1. An intelligent color-changing display device is characterized by comprising a substrate, an electrochromic device, an organic light-emitting diode display device, a photosensitive module and a control unit; the substrate comprises a first substrate and a second substrate, the electrochromic device and the organic light emitting diode display device are positioned between the first substrate and the second substrate, and the electrochromic device and the organic light emitting diode display device are sequentially arranged on the first substrate; the electrochromic device and the organic light emitting diode display device are respectively electrically connected with the control unit, and the control unit is electrically connected with the photosensitive module.
2. The intelligent color-changing display device as claimed in claim 1, wherein the control unit comprises a first driving unit and a second driving unit, the first driving unit being electrically connected to the electrochromic device, the second driving unit being connected to the organic light emitting diode display device.
3. The intelligent color-changing display device according to claim 1, wherein a touch film is attached to an outer surface of the substrate.
4. The smart color-changing display device as claimed in claim 1, wherein the electrochromic device comprises a first electrochromic cell and a second electrochromic cell, the organic light emitting diode display device being located between the first electrochromic cell and the second electrochromic cell.
5. The intelligent color changing display device of claim 1, further comprising an encapsulation layer between the organic light emitting diode display device and the second substrate.
6. The smart color changing display device of claim 1, wherein the material of the encapsulation layer is selected from at least one of the following materials: nb oxide, Si oxide, Ti oxide, CrNi oxide, Zr oxide.
7. The intelligent color-changing display device according to claim 1, wherein the electrochromic device comprises a first conductive layer, an electrochromic stack and a second conductive layer in sequence from the first substrate, wherein the electrochromic stack comprises an electrochromic layer, an ion transport layer and an ion storage layer; the organic light emitting diode display device and the electrochromic device share the second conducting layer, the organic light emitting diode display device sequentially comprises an organic light emitting diode lamination layer and a third conducting layer from the second conducting layer, and the organic light emitting diode lamination layer sequentially comprises an electron transport layer, an organic display layer and a hole injection layer from the second conducting layer.
8. The smart color change display device of claim 7 wherein the electrochromic layer comprises a cathodic electrochromic material and the ion storage layer comprises an anodic electrochromic material.
9. The smart color changing display device of claim 8 wherein the electrochromic layer and the ion storage layer comprise nitrogen.
10. The smart color-changing display device of claim 8 wherein the cathodic coloring material is selected from a material from the group consisting of: tungsten oxynitride, molybdenum oxynitride, niobium oxynitride, titanium oxynitride, tantalum oxynitride; the anodic coloring material is selected from the group consisting of: nickel oxynitride, iridium oxynitride, manganese oxynitride, cobalt oxynitride, tungsten nickel oxynitride, tungsten iridium oxynitride, tungsten manganese oxynitride, tungsten cobalt oxynitride.
11. The intelligent color-changing display device according to claim 1, wherein the control unit comprises a feedback integrated circuit, an electrochromic control chip, a circuit board, a capacitor, and a switch.
12. The intelligent color-changing display device of claim 1, wherein the substrate inner surface comprises a notch groove having a depth less than a thickness of the substrate, the control unit being located in the notch groove.
13. A preparation method of an intelligent color-changing display device is characterized by comprising the following steps: the method comprises the steps of sequentially arranging an electrochromic device and an OLED display device between a first substrate and a second substrate, electrically connecting the electrochromic device and the OLED display device with a control unit respectively, and electrically connecting the control unit with a photosensitive module.
14. The method of manufacturing an intelligent color-changing display device according to claim 13, comprising the steps of: sequentially forming a first conductive layer, an electrochromic layer, an ion transmission layer, an ion storage layer, a second conductive layer, a third conductive layer, an electron transport layer, an organic display layer and a hole injection layer on the surface of the first substrate; and a step of forming an electrode on the inner surface of the substrate.
15. The method of claim 14, further comprising the step of forming an encapsulation layer on the surface of the hole injection layer.
16. The method of claim 14, further comprising the step of forming a touch film on the surface of the substrate.
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