CN115963668A - Liquid metal electroluminescent device - Google Patents
Liquid metal electroluminescent device Download PDFInfo
- Publication number
- CN115963668A CN115963668A CN202111181910.0A CN202111181910A CN115963668A CN 115963668 A CN115963668 A CN 115963668A CN 202111181910 A CN202111181910 A CN 202111181910A CN 115963668 A CN115963668 A CN 115963668A
- Authority
- CN
- China
- Prior art keywords
- liquid metal
- electrode
- electroluminescent device
- power supply
- emitting layer
- 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.)
- Pending
Links
Images
Abstract
The invention relates to the technical field of display, in particular to a liquid metal electroluminescent device. The liquid metal electroluminescent device includes: a light emitting layer; a liquid metal pattern electrode disposed at one side of the light emitting layer; a liquid metal planar electrode provided on the other side of the light emitting layer; a power supply, at least one electrode of the power supply being connected with the liquid metal pattern electrode. The liquid metal electroluminescent device provided by the invention has a simple structure, does not use a transparent electrode layer, uses liquid metal as an electrode, and can enable the luminescent sheet to show a luminescent effect with a self-defined shape.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid metal electroluminescent device.
Background
An Electroluminescent (EL) device is a device that emits light using electroluminescent powder in an alternating electric field, and does not generate heat when operating, and is often called a cold light sheet. The EL cold light sheet has the characteristics of uniform brightness, no glare and the like, and is a novel energy-saving environment-friendly light source. According to the difference of using luminescent material, can obtain the electroluminescent sheet of different colours, and possess the characteristics of bendable and freely tailorring.
The main structure of the current EL luminescent sheet is formed by stacking a transparent electrode, a luminescent layer, a dielectric layer and a bottom electrode, wherein the transparent electrode layer and the bottom electrode are respectively arranged at two sides of the luminescent layer, and the dielectric layer is optionally added between the bottom electrode and the luminescent layer to reduce the risk of device failure. When alternating current is applied between the transparent electrode and the bottom electrode, the fluorescent powder in the luminescent layer emits light under the action of the electric field, and the light is transmitted from the transparent electrode side. At present, various transparent electrodes are needed to transmit light, and the common transparent electrodes are Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), fluorine doped oxide (FTO), etc., but the EL electroluminescent sheet is limited in its wider application due to its characteristics of high price and inextensibility. The way of preparing different display patterns is complex, the electrode mask needs to be prepared again to obtain different display patterns, the process is complex, and the cost is high. The prior EL cold light sheet is restricted by the transparent electrode, and the construction process of the display pattern is complex, thereby limiting the wider application of the display pattern.
At present, it is urgently needed to provide an EL electroluminescent sheet which can improve the applicability of the EL electroluminescent sheet, realize the rapid construction of the EL electroluminescent sheet with a custom pattern, use a printed liquid metal pattern to construct a pattern on a luminescent layer, and conveniently obtain the custom pattern.
Disclosure of Invention
In order to solve the technical problem, the invention provides a liquid metal electroluminescent device. The liquid metal electroluminescent device provided by the invention has a simple structure, does not use a transparent electrode layer, uses liquid metal as an electrode, and can enable the luminescent sheet to show a luminescent effect with a self-defined shape.
Specifically, the present invention provides a liquid metal electroluminescent device, including:
a light-emitting layer 2;
a liquid metal pattern electrode 1, the liquid metal pattern electrode 1 being disposed on one side of the light emitting layer 2;
a liquid metal planar electrode 3, the liquid metal planar electrode 3 being provided on the other side of the light-emitting layer 2;
a power supply 4, at least one electrode of the power supply 4 being connected to the liquid metal pattern electrode 1;
the liquid metal electroluminescent device does not use a transparent electrode.
The inventor finds that the liquid metal electroluminescent device does not need to use a transparent electrode, the liquid metal is used as the electrode on both sides of the luminescent layer, patterns can be defined by the liquid metal, the patterns constructed on the luminescent layer by using the liquid metal can achieve the luminous effect of the edges of the patterns, and the liquid metal electroluminescent device can be bent, twisted and stretched, and is simple in structure.
According to the liquid metal electroluminescent device provided by the invention, the liquid metal pattern electrode 1 is formed by drawing liquid metal on one side of the luminescent layer 2; the liquid metal planar electrode 3 is formed by drawing liquid metal on the other side of the light emitting layer 2.
In the invention, the drawn liquid metal pattern on the light-emitting layer 2 can be erased and can be redrawn; and the liquid metal electroluminescent device can work normally to emit light under the stretching state.
According to the liquid metal electroluminescent device provided by the invention, the electrodes of the power supply 4 comprise a power supply first electrode 41 and a power supply second electrode 42.
According to the liquid metal electroluminescent device provided by the invention, one connection mode of the power supply 4 is as follows: the power supply first electrode 41 is connected to the liquid metal planar electrode 3, and the power supply second electrode 42 is connected to the liquid metal pattern electrode 1.
According to the liquid metal electroluminescent device provided by the present invention, the liquid metal pattern electrode 1 is preferably drawn as a first liquid metal pattern electrode 1a and a second liquid metal pattern electrode 1b that are not connected to each other on the light emitting layer 2.
According to the liquid metal electroluminescent device provided by the present invention, the second connection mode of the power supply 4 is: the power supply first electrode 41 is connected to the first liquid metal pattern electrode 1a, and the power supply second electrode 42 is connected to the second liquid metal pattern electrode 1b.
According to the liquid metal electroluminescent device provided by the invention, the melting point of the liquid metal is lower than 300 ℃; preferably, the liquid metal is a conductive fluid formed by one or more simple substances selected from gallium, indium, tin, zinc, bismuth, lead, cadmium, copper, silver, gold, iron, cobalt, nickel, manganese, titanium and vanadium; or the liquid metal is a conductive fluid formed by one or more simple substances selected from gallium, indium, tin, zinc, bismuth, lead, cadmium, copper, silver, gold, iron, cobalt, nickel, manganese, titanium and vanadium and a fluid dispersing agent.
According to the liquid metal electroluminescent device provided by the invention, the area of the liquid metal pattern electrode 1 is smaller than that of the liquid metal planar electrode 3.
According to the liquid metal electroluminescent device provided by the invention, a dielectric layer 5 is arranged between the liquid metal planar electrode 3 and the light-emitting layer 2; preferably, the dielectric layer 5 is formed by compounding a high dielectric constant material and a binder; the high dielectric constant material is preferably selected from one or more of barium titanate, barium zirconate titanate and barium calcium barium zirconate titanate.
According to the liquid metal electroluminescent device provided by the invention, the thickness of the luminescent layer 2 is 10-500 um; the thickness of the dielectric layer 5 is 10-300 um.
According to the liquid metal electroluminescent device provided by the invention, the luminescent layer 2 is formed by compounding a luminescent material and a binder; the luminescent material includes one or more of a blue luminescent material, a green luminescent material, and a red luminescent material.
According to the liquid metal electroluminescent device provided by the invention, the liquid metal pattern electrode 1 and the liquid metal planar electrode 3 can be erased and reconstructed.
According to the liquid metal electroluminescent device provided by the invention, a transparent packaging material is arranged or not arranged at the outer sides of the liquid metal pattern electrode 1 and the liquid metal planar electrode 3.
In the second power connection mode of the present invention, the relative size of the areas of the first liquid metal pattern electrode 1a and the second liquid metal pattern electrode 1b affects the display brightness thereof; the liquid metal pattern electrode has a relatively small area, and the brightness is higher in this power supply connection mode.
The invention has the beneficial effects that:
1. the liquid metal electroluminescent device provided by the invention does not need to use a transparent electrode, and both sides of the luminescent layer use liquid metal as electrodes;
2. the liquid metal electroluminescent device provided by the invention can self-define patterns, and the patterns constructed on the luminescent layer by using liquid metal can realize the edge luminescent effect of the patterns;
3. the liquid metal electroluminescent device pattern provided by the invention can be erased and reconstructed;
4. the liquid metal electroluminescent device provided by the invention can be bent, twisted and stretched;
5. the liquid metal electroluminescent device provided by the invention has a simple preparation process, and does not need expensive vacuum equipment and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light emitting sheet according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a light emitting sheet according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light emitting sheet according to an embodiment of the present invention.
In the figure, 1: liquid metal pattern electrode, 1a: first liquid metal pattern electrode, 1b: second liquid metal pattern electrode, 2: light-emitting layer, 3: liquid metal planar electrode, 4: power supply, 41: power supply first electrode, 42: power supply second electrode, 5: a dielectric layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention. The examples do not specify particular techniques or conditions, and are to be construed in accordance with the description of the art in the literature or with the specification of the product. The reagents or instruments used are conventional products available from normal commercial vendors, not indicated by the manufacturer.
Example 1
An embodiment of the present invention provides a liquid metal electroluminescent device (light emitting sheet) capable of customizing a pattern without using a transparent electrode, and specifically, as shown in fig. 1, the light emitting sheet includes:
the luminescent layer 2 is formed by compounding electroluminescent powder and polymer adhesive and is made into a thin layer; the liquid metal pattern electrode 1 is positioned on one side of the luminescent layer 2;
a liquid metal planar electrode 3, the liquid metal planar electrode 3 being positioned on the other side of the light emitting layer 2 away from the liquid metal pattern electrode 1;
the liquid metal pattern electrode 1 and the planar electrode 3 are formed by drawing liquid metal with the melting point lower than 300 ℃, and the drawing mode is printing, direct writing, hand drawing, spraying or transfer printing.
The power source 4, the power source second electrode 42 and the liquid metal pattern electrode 1 are connected, and the power source first electrode 41 and the liquid metal planar electrode 3 are connected.
The thickness of the light-emitting layer 2 is 50um.
And transparent packaging materials are arranged on the outer sides of the liquid metal pattern electrode 1 and the liquid metal planar electrode 3.
When the device works, the edges of the pattern electrodes 1a and 1b emit light rays to present the outline of the liquid metal pattern.
Wherein the liquid metal pattern electrode 1 can be erased and later reconstructed.
Example 2
As shown in fig. 2, the present embodiment is substantially the same as the device structure of embodiment 1, except that:
the two electrodes (power supply first electrode 41 and power supply first electrode 42) of the power supply 4 are not connected to the liquid metal planar electrode 3, the power supply first electrode 41 is connected to the first liquid metal pattern electrode 1a, and the power supply second electrode 42 is connected to the liquid metal pattern electrode 1b.
In this connected state, the capacitor formed by the power supply first electrode 41, the dielectric layer 2, and the first liquid metal pattern electrode 1a is connected in series with the capacitor formed by the power supply second electrode 42, the dielectric layer 2, and the second liquid metal pattern electrode 1b, and the liquid metal planar electrode 3 is used as a common electrode. After the power supply 4 is started, according to the charge conservation and the capacitor capacitance calculation formula, the distribution relation of the electric field intensity under different electrode relative areas can be obtained: the electric field intensity is larger for a relatively small area of the pattern electrode. Because the electroluminescent brightness is positively correlated with the magnitude of the electric field intensity, i.e. the brightness of the pattern electrode with a relatively small area is larger.
Example 3
As shown in fig. 3, the present embodiment is substantially the same as the device structure of embodiment 1, except that: a dielectric layer 5 is added between the liquid metal planar electrode 3 and the luminous layer 2, and the thickness of the dielectric layer 5 is 40um; to avoid accidental failure of the circuit.
Although the invention has been described in detail with respect to the general description and the specific embodiments thereof, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A liquid metal electroluminescent device, comprising:
a light-emitting layer (2);
the liquid metal pattern electrode layer is arranged on one side of the light-emitting layer (2), and the liquid metal pattern electrode (1) is arranged on the other side of the light-emitting layer;
a liquid metal planar electrode (3), wherein the liquid metal planar electrode (3) is arranged on the other side of the light-emitting layer (2);
a power supply (4), at least one electrode of the power supply (4) being connected with the liquid metal pattern electrode (1).
2. A liquid metal electroluminescent device according to claim 1, characterized in that the liquid metal pattern electrode (1) is drawn from liquid metal on one side of the light-emitting layer (2); the liquid metal planar electrode (3) is formed by drawing liquid metal on the other side of the light-emitting layer (2).
3. A liquid metal electroluminescent device as claimed in claim 1 or 2, characterized in that the electrodes of the power supply (4) comprise a power supply first electrode (41) and a power supply second electrode (42).
4. A liquid metal electroluminescent device according to claim 3, characterized in that one connection of the power supply (4) is: the power supply first electrode (41) is connected to the liquid metal planar electrode (3), and the power supply second electrode (42) is connected to the liquid metal pattern electrode (1).
5. A liquid metal electroluminescent device according to claim 3, characterized in that the liquid metal pattern electrode (1) is a first liquid metal pattern electrode (1 a) and a second liquid metal pattern electrode (1 b) drawn on the light-emitting layer (2) so as not to be in communication with each other; preferably, the second connection mode of the power supply (4) is as follows: the power supply first electrode (41) is connected to the first liquid metal pattern electrode (1 a), and the power supply second electrode (42) is connected to the second liquid metal pattern electrode (1 b).
6. A liquid metal electroluminescent device as claimed in any one of claims 1 to 5, wherein the liquid metal has a melting point of less than 300 ℃; preferably, the liquid metal is a conductive fluid formed by one or more simple substances selected from gallium, indium, tin, zinc, bismuth, lead, cadmium, copper, silver, gold, iron, cobalt, nickel, manganese, titanium and vanadium; or the liquid metal is a conductive fluid formed by one or more simple substances selected from gallium, indium, tin, zinc, bismuth, lead, cadmium, copper, silver, gold, iron, cobalt, nickel, manganese, titanium and vanadium and a fluid dispersing agent.
7. A liquid metal electroluminescent device according to any one of claims 1 to 6, characterized in that the area of the liquid metal pattern electrode (1) is smaller than the area of the liquid metal planar electrode (3).
8. A liquid metal electroluminescent device as claimed in any one of claims 1 to 7, characterized in that a dielectric layer (5) is provided between the planar liquid metal electrode (3) and the light-emitting layer (2); preferably, the dielectric layer (5) is formed by compounding a high dielectric constant material and a binder; the high dielectric constant material is preferably selected from one or more of barium titanate, barium zirconate titanate and barium calcium barium zirconate titanate; more preferably, the thickness of the light-emitting layer (2) is 10 to 500um; the thickness of the dielectric layer (5) is 10-300 um.
9. A liquid metal electroluminescent device according to any one of claims 1 to 8, characterized in that the light-emitting layer (2) is compounded of a luminescent material and a binder; the luminescent material includes one or more of a blue luminescent material, a green luminescent material, and a red luminescent material.
10. A liquid metal electroluminescent device as claimed in any one of claims 1 to 9, characterized in that the liquid metal pattern electrode (1) and the liquid metal planar electrode (3) can be erased and reconstructed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181910.0A CN115963668A (en) | 2021-10-11 | 2021-10-11 | Liquid metal electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181910.0A CN115963668A (en) | 2021-10-11 | 2021-10-11 | Liquid metal electroluminescent device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115963668A true CN115963668A (en) | 2023-04-14 |
Family
ID=87351570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111181910.0A Pending CN115963668A (en) | 2021-10-11 | 2021-10-11 | Liquid metal electroluminescent device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115963668A (en) |
-
2021
- 2021-10-11 CN CN202111181910.0A patent/CN115963668A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100240432B1 (en) | Fabrication methods and device structures of ac power electroluminescence devices | |
| EP2993711B1 (en) | Organic light emitting device and method for fabricating same | |
| US20040183434A1 (en) | Electroluminescent element with double-sided luminous surface and process for fabricating the same | |
| TWI246360B (en) | Electrode for organic light emitting device and organic light emitting device comprising the same | |
| US6541910B2 (en) | Organic el display | |
| CN102043533B (en) | OLED display and manufacture method thereof | |
| CN105185808B (en) | Active-matrix Organic Light Emitting Diode touch control display apparatus | |
| CN103838448A (en) | Integration OLED touch screen displayer based on graphene | |
| CN103996693B (en) | Oled panel and preparation method thereof, display unit | |
| CN216351678U (en) | Liquid metal electroluminescent device | |
| JP3887984B2 (en) | Multicolor light emitting dispersion type EL lamp | |
| CN115963668A (en) | Liquid metal electroluminescent device | |
| TWI434598B (en) | Organic light-emitting diode module | |
| WO2014187236A1 (en) | Electroluminescence principle based luminous structure and display device | |
| JPH11224782A (en) | Electroluminescence | |
| CN111129322A (en) | Color-adjustable coplanar electrode type organic electroluminescent device | |
| KR20090008879A (en) | Method of preparing dispersion type inorganic electroluminescence device and dispersion type ac inorganic electroluminescence device prepared thereby | |
| CN107438307A (en) | A kind of Rimless glass cold light film | |
| KR20150074241A (en) | Transparent crystal display device | |
| CN219536758U (en) | Flexible electroluminescent device | |
| KR20040020220A (en) | AC EL device and fabrication method thereof | |
| CN207883695U (en) | A kind of display panel and display device | |
| CN108039359B (en) | ULED/OLED combined light-emitting body for display | |
| KR100860569B1 (en) | Inorganic electro-luminescence lamp and manufacturing method thereof | |
| JPH04105496U (en) | electroluminescence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |