KR-20260067103-A - Electroluminescent Acoustic Composition and Electroluminescent Sound Display

Abstract

The present invention relates to an electrophotoacoustic composition and an electrophotoacoustic device. The object of the present invention is to provide a method for detecting polar liquids by optimizing the content of a ferroelectric polymer resin and a phosphor. An electrophotoacoustic composition according to an embodiment of the present invention comprises a polymer resin and a phosphor.

Inventors

• 배진우
• 윤재욱
• 이다은
• 전은지
• 윤준모

Assignees

• 한국기술교육대학교 산학협력단

Dates

Publication Date

20260512

Application Date

20241105

Claims (10)

1. Polymer resin and Includes a phosphor, The above phosphor is copper-doped zinc sulfide (ZnS:Cu), Electrophotoacoustic composition.
2. In paragraph 1, The content of the phosphor is 250 to 350 parts by weight per 100 parts by weight of the polymer resin, Electrophotoacoustic composition.
3. In paragraph 1, The above polymer resin is PVDF-TrFE (Polyvinylidene fluoride-trifluoroethylene), Electrophotoacoustic composition.
4. A step of preparing a mixture by mixing a polymer resin and a phosphor; A step of forming a coating layer by applying the above mixture and The method includes the step of drying the coating layer, The above phosphor is copper-doped zinc sulfide (ZnS:Cu), Method for manufacturing an electrophotoacoustic layer.
5. In paragraph 4 The content of the phosphor in the above mixture is 250 to 350 parts by weight per 100 parts by weight of the polymer resin, Method for manufacturing an electrophotoacoustic layer.
6. It includes a first electrode, a second electrode and an electrophotoacoustic layer, and The above electrophotoacoustic layer is that of claim 4, Electrophotoacoustic device.
7. In paragraph 6, The first electrode and the second electrode are disposed on the same plane of the electroacoustic layer. Electrophotoacoustic device.
8. Step of preparing the first electrode and the second electrode; A step of forming an electrophotoacoustic layer using the above electrophotoacoustic composition and The method includes the step of placing the first electrode and the second electrode on the electrophotoacoustic layer, and The above electrophotoacoustic composition is that of claim 1, Method for manufacturing an electrophotoacoustic device.
9. In paragraph 8 In the above electrophotoacoustic composition, the content of the phosphor is 250 to 350 parts by weight per 100 parts by weight of the polymer resin, Method for manufacturing an electrophotoacoustic device.
10. In paragraph 8, The first electrode and the second electrode are disposed on the same plane of the electroacoustic layer. Method for manufacturing an electrophotoacoustic device.

Description

Electroluminescent Acoustic Composition and Electroluminescent Sound Display Capable of Detecting Polarized Liquids The present invention relates to an electrophotoacoustic composition and an electrophotoacoustic device. The present invention was devised (conceived) as a result of the research on "liquid sensing pipe using polar ferroelectric material" of the LINC 3.0 project, which was supported by funding from the Ministry of Education and the National Research Foundation of Korea. The objective of the present invention is to provide a method for detecting polar liquids by optimizing the content of a ferroelectric polymer resin and a phosphor. Electro-optical devices are attracting attention as a new type of display alongside the recent advancements in wearable electronic devices. While conventional displays have been limited primarily to the function of conveying visual information, there is a growing need for multi-functional displays that combine sound and light-emitting functions to enrich interaction with users. Conventional electroluminescent (EL) devices have attracted much attention as devices with a simple structure, lightweight nature, long lifespan, and excellent deformation capabilities. These devices are primarily based on silver nanowires or highly conductive materials and exhibit high luminescence when voltage is applied, but they have limitations in terms of flexibility. Additionally, while conventional flexible electrodes, such as hydrogel electrodes, offer high flexibility, they have the problem of unstable performance due to sensitivity to changes in humidity and temperature. FIG. 1 is a flowchart of a method for manufacturing an electrophotoacoustic layer according to an embodiment of the present invention. Figure 2 is a chemical structure diagram of copper-doped zinc sulfide (ZnS:Cu). FIG. 3 is a flowchart of a method for manufacturing an electrophotoacoustic device according to an embodiment of the present invention. FIG. 4 is a photograph of an electrophotoacoustic device according to an embodiment of the present invention. Figure 5 shows the luminance measurement results according to the voltage of the example. Figure 6 shows the sound pressure measurement results according to the voltage of the example. Figure 7 is the genetic specific analysis result of the example. Figure 8 is a photograph showing the luminescence phenomenon according to the voltage of the example. Hereinafter, preferred embodiments of the present invention are described as follows with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. An electrophotoacoustic composition according to an embodiment of the present invention comprises a polymer resin and a phosphor. The above polymer resin forms the basic structure of the electroluminescent film speaker in this invention and enables luminescence and acoustic properties in response to an electric field. The above polymer resin may be any one of PVDF-TrFE (Polyvinylidene fluoride-trifluoroethylene), PVDF (Polyvinylidene fluoride), and PZT (Lead Zirconate Titanate). PVDF-TrFE is a ferroelectric polymer that can maintain polarization in an electric field, possesses excellent piezoelectric properties, and has excellent flexibility and strength, making it more preferable. The above phosphor is a material that absorbs energy supplied from an external source and emits it as light. The above phosphor is copper-doped zinc sulfide (ZnS:Cu). The copper-doped zinc sulfide is desirable as it has excellent luminous efficiency, durability, and stability. The content of the phosphor may be 250 to 350 parts by weight, preferably 280 to 320 parts by weight, per 100 parts by weight of the polymer resin. If the content of the phosphor is too high, the luminescence performance increases but the mechanical properties and acoustic performance decrease, and conversely, if the content is too low, there is a problem that the luminescence performance decreases. A method for manufacturing an electrophotoacoustic layer according to an embodiment of the present invention comprises the steps of: mixing a polymer resin and a phosphor to prepare a mixture; applying the mixture to form a coating layer; and drying the coating layer. The step of preparing the above mixture is a step of preparing a base material such that electrical and mechanical properties are uniform by mixing each mixture so that it is evenly dispersed. This step can be performed by adding the polymer resin and copper-doped zinc sulfide (ZnS:Cu) simultaneously or separately and using a stirrer, etc. This step can be performed at room temperature. This step can be performed by mixing together an organic solvent capable of dissolving th