A dual-layer electroluminescent dimming film for starry sky display based on flow cooling

Abstract

This invention discloses a dual-layer electroluminescent dimming film for starry sky display based on fluid cooling, comprising a lower substrate; cooling pipes disposed on the lower substrate, with a light emitter disposed within the cooling pipes; an electrode layer located above the cooling pipes, the electrode layer including a lower electrode and an upper electrode disposed opposite each other, a functional layer located between the lower electrode and the upper electrode; an upper substrate covering the electrode layer; and a coolant replenishment pipe communicating with the cooling pipes. The beneficial effects of this invention are: this technical solution combines fluid cooling with electroluminescence dimming functions; the cooling pipes not only provide temperature control for the electrode layer and the light emitter, but also achieve starry sky display through fluid dynamics, resulting in high functional integration; the light emitters have diverse shapes and are fluid, combined with a static striped background formed by columnar spacer layers, achieving a composite starry sky effect of "dynamic starlight + static star trails," resulting in rich visual layers.

Description

Technical Field

[0001] This invention relates to the field of dimming film technology, and in particular to a double-layer electroluminescent dimming film for starry sky display based on flow cooling. Background Technology

[0002] Electroluminescent films, as a type of smart material that can adjust light transmittance via electrical signals, are widely used in building curtain walls, automotive sunroofs, display devices, and other fields. In existing technologies, electroluminescent films typically achieve dimming by altering the optical properties of functional layers between electrodes (such as liquid crystals and electrochromic materials), but their function is relatively limited and it is difficult to integrate dynamic display or decorative effects.

[0003] For display needs in scenarios such as starry sky ceilings, traditional solutions often use fixed LED arrays or printed patterns, which suffer from the problem of fixed light-emitting body shapes that cannot be dynamically changed. Some improved technologies attempt to embed fluorescent particles in the film layer, but lack effective light guiding and heat dissipation designs, resulting in poor display uniformity and performance degradation due to increased temperature after long-term use. In addition, the light control structures (such as spacer layers) of existing dimming films are mostly randomly distributed, making it difficult to form regular light and shadow patterns, which limits their application in high-end decorative fields.

[0004] To address the aforementioned issues, this invention proposes a dual-layer electroluminescent film based on flow cooling that integrates flow cooling, dynamic starry sky display, and electroluminescent dimming functions. By optimizing the cooling system, the design of the light-emitting element, and the light guiding mechanism, the dimming performance and dynamic visual effects are synergistically improved. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a double-layer electroluminescent dimming film for starry sky display based on flow cooling, thereby solving one or more of the problems in the prior art.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: a double-layer electroluminescent dimming film for starry sky display based on flow cooling, the innovation of which lies in: comprising

[0007] lower base plate;

[0008] The cooling pipes disposed on the lower substrate adopt a flat microchannel structure and are only equipped with light emitters and coolant. They are driven by a micro peristaltic pump to form a closed loop circulation.

[0009] An electrode layer located above the cooling pipe, the electrode layer comprising a lower electrode and an upper electrode disposed opposite to each other;

[0010] A functional layer located between the lower electrode and the upper electrode, the functional layer comprising a dichromatic dye region layer and columnar spacer layers spaced apart within the dichromatic dye region layer, which are distributed only in the electrode layer and vertically penetrate the dye layer;

[0011] And an upper substrate covering the electrode layer; and a coolant replenishment pipe communicating with the cooling pipe.

[0012] In some embodiments, a hemispherical crystal is provided at the bottom of the columnar spacer layer, the hemispherical crystal being used to convert light entering the columnar spacer layer into a straight-propagating beam and form tubular light and dark stripes.

[0013] In some embodiments, the light emitter is a fluorescent light emitter, or is filled with phosphor, which can be excited by natural blue light or ultraviolet LED light strips to emit fluorescence.

[0014] In some embodiments, the shape of the light-emitting body includes a spherical or irregular structure, wherein the irregular structure is selected from at least one animal shape, such as a butterfly or a bird.

[0015] In some embodiments, a coolant replenishment pipe extends from the bottom of the lower substrate into the cooling pipe, for replenishing the cooling pipe with coolant and the light emitter.

[0016] In some embodiments, the cooling conduit includes a lower wall and an upper wall, the lower wall being attached to the lower substrate, and the upper wall being connected to the lower electrode via a flexible adhesive layer.

[0017] In some embodiments, the electrode layer further includes a flexible adhesive layer disposed between the lower electrode and the cooling pipe, the flexible adhesive layer being used to fix the relative position of the electrode layer and the cooling pipe.

[0018] In some embodiments, a coolant transport plane channel is formed within the cooling pipe, and the light emitter is disposed within the coolant transport plane channel and flows with the coolant.

[0019] In some embodiments, the columnar spacer layer has a straight tubular structure and extends along the thickness direction of the dichroic dye region layer.

[0020] The beneficial effects of this invention are:

[0021] Dual-layer collaborative design: Combining flow cooling with electroluminescence dimming, the cooling pipes not only provide temperature control for the electrode layer and the light emitter, but also realize star display through fluid dynamics, resulting in a high degree of functional integration.

[0022] Dynamic visual effects: The luminous bodies are diverse in shape and can flow, combined with the static striped background formed by columnar spacer layers, to achieve a composite starry sky effect of "dynamic starlight + static star trails", with rich visual layers.

[0023] Structural stability: The flexible adhesive layer and the straight tubular columnar spacer layer together enhance the mechanical strength of the membrane, avoid structural deformation caused by fluid flow, and improve long-term reliability.

[0024] Highly scalable: By changing the shape of the light source, adjusting the coolant flow rate, or the type of dye, it can be adapted to the personalized needs of different scenarios (such as home theaters, car sunroofs, and commercial displays). Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of a double-layer electroluminescent dimming film for starry sky display based on flow cooling according to the present invention. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, the embodiments of the present invention include: a double-layer display starry sky electroluminescent dimming film based on flow cooling, comprising a lower substrate 1, a cooling pipe, an electrode layer, an upper substrate 11, and a coolant replenishment pipe 12.

[0029] Lower substrate 1: Made of transparent glass or flexible polymer material, serving as the supporting base for the entire structure.

[0030] Cooling pipe: attached to the top of the lower substrate 1, including a lower wall 2 and an upper wall 5. The lower wall 2 is directly attached to the lower substrate 1. A coolant transport planar channel is formed inside the pipe. A light-emitting element 3 is arranged inside the channel. The cooling pipe is made of transparent polycarbonate material and is formed by injection molding into a flat flow channel with a thickness of 0.5mm (cross-sectional size 2mm×10mm). Only the light-emitting element and coolant are arranged inside the flow channel, without columnar spacer layer. The coolant is driven by a micro peristaltic pump and forms a closed loop circulation through the inlet and outlet of the lower substrate edge. The flow rate is controlled in the range of 0.5-2cm / s. The light-emitting element 3 is a spherical structure filled with phosphor and can emit fluorescence under blue light excitation. A hemispherical crystal 4 is provided at the bottom of the columnar spacer layer 9 to convert the light entering the straight pipe into a straight beam, thereby forming tubular bright and dark stripes on the surface of the hemispherical crystal 4.

[0031] Flexible adhesive layer 6: Located on the top of the upper wall 5 of the pipe, it is used to connect the cooling pipe and the electrode layer. The material is high-temperature resistant silicone to ensure structural stability.

[0032] Electrode layer: Located above the flexible adhesive layer 6, it consists of a lower electrode 7, a dichroic dye region 8, a columnar spacer layer 9, and an upper electrode 10. The dichroic dye region 8 fills the space between the lower electrode 7 and the upper electrode 10. The columnar spacer layer 9 is vertically spaced within the dichroic dye region 8 and penetrates the region along its thickness. The columnar spacer layer is only distributed within the dichroic dye region of the electrode layer, vertically penetrating the dye layer (50 μm in height), and is a parallel layer structure independent of the cooling channels. A hemispherical crystal (30 μm in diameter, refractive index 1.58) embedded at the bottom of the columnar spacer layer is integrally formed with the spacer layer using photolithography. This crystal can convert 370-420 nm blue light into a parallel beam, forming a tubular bright and dark stripe background with a spacing of 0.2 mm. Both the upper electrode 10 and the lower electrode 7 use ITO transparent conductive films to apply a driving voltage to adjust the light transmittance of the dichroic dye.

[0033] Upper substrate 11: Covers the top of the upper electrode 10, and is made of the same material as the lower substrate 1, serving to protect the electrode layer and allow light to pass through.

[0034] Coolant replenishment pipe 12: extends from the bottom of the lower substrate 1 to the cooling pipe, and is used to replenish the pipe with coolant and irregularly shaped light emitters 13 (such as fluorescent light emitters in the shape of butterflies or birds).

[0035] In this technical solution, the upper and lower walls of the cooling pipe are made of borosilicate glass (92% light transmittance), and the flexible bonding layer 6 is made of transparent organic silicone (88% light transmittance) to ensure that the blue light transmittance is ≥85%.

[0036] In this technical solution, the blue light excitation emitting body or phosphor can be selected by two excitation methods: ① Natural light source excitation: using the 400-480nm blue light band in the environment; ② Active excitation: integrating a 3W ultraviolet LED strip (peak wavelength 405nm) on the edge of the lower substrate, and uniformly irradiating the cooling pipe through the light guide plate.

[0037] The working principle of this technical solution is as follows:

[0038] Dimming function: When no voltage is applied between the upper electrode 10 and the lower electrode 7, the dichroic dye region 8 is in a non-transparent state. At this time, after the external light enters the straight tubular columnar spacer layer 9, it is refracted by the bottom hemispherical crystal 4 to form a straight beam of light, which presents regular tubular bright and dark stripes on the surface of the film. When a voltage is applied, the dye molecules are oriented and the light can pass through the dichroic dye region 8 to achieve overall light transmission.

[0039] Starry sky display function: The coolant in the cooling pipe carries the luminescent body 3 (spherical phosphor) and the irregularly shaped luminescent body 13. The phosphor emits fluorescence after being excited by natural blue light or an external light source. At the same time, the light and dark stripes formed by the straight tubular spacer layer and the hemispherical crystal 4 serve as a background, which together with the flowing luminescent body constitute a dynamic "starry sky top" effect. The coolant replenishment pipe 12 can replenish the luminescent body and coolant in real time to ensure the continuity and diversity of the starry sky effect.

[0040] The advantages of this technical solution are:

[0041] Dual-layer collaborative design: Combining flow cooling with electroluminescence dimming, the cooling pipes not only provide temperature control for the electrode layer and the light emitter, but also realize star display through fluid dynamics, resulting in a high degree of functional integration.

[0042] Dynamic visual effects: The luminous bodies are diverse in shape and can flow, combined with the static striped background formed by columnar spacer layers, to achieve a composite starry sky effect of "dynamic starlight + static star trails", with rich visual layers.

[0043] Structural stability: The flexible adhesive layer 6 and the straight tubular columnar spacer layer 9 together enhance the mechanical strength of the membrane, avoid structural deformation caused by fluid flow, and improve long-term reliability.

[0044] Highly scalable: By changing the shape of the light source, adjusting the coolant flow rate, or the type of dye, it can be adapted to the personalized needs of different scenarios (such as home theaters, car sunroofs, and commercial displays).

[0045] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A double-layer electroluminescent dimming film for displaying starry skies based on flow cooling, characterized in that: include lower base plate; The cooling pipes disposed on the lower substrate adopt a flat microchannel structure and are only equipped with light emitters and coolant. They are driven by a micro peristaltic pump to form a closed loop circulation. An electrode layer located above the cooling pipe, the electrode layer comprising a lower electrode and an upper electrode disposed opposite to each other; A functional layer located between the lower electrode and the upper electrode, the functional layer comprising a dichromatic dye region layer and columnar spacer layers spaced apart within the dichromatic dye region layer, which are distributed only in the electrode layer and vertically penetrate the dye layer; And an upper substrate covering the electrode layer; and a coolant replenishment pipe communicating with the cooling pipe.

2. The double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The bottom of the columnar spacer layer is provided with a hemispherical crystal, which is used to convert the light entering the columnar spacer layer into a straight-propagating beam and form tubular light and dark stripes.

3. The double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The light-emitting body is a fluorescent light-emitting body, or is filled with phosphor, which can emit fluorescence by being excited by natural blue light or ultraviolet LED light strip.

4. The double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The shape of the light-emitting body includes a spherical or irregular structure, wherein the irregular structure is selected from at least one animal shape, such as a butterfly or a bird.

5. The double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The coolant replenishment pipe extends from the bottom of the lower substrate to the cooling pipe, and is used to replenish the coolant and the light-emitting element to the cooling pipe.

6. The dual-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The cooling pipe includes a lower wall and an upper wall. The lower wall is attached to the lower substrate, and the upper wall is connected to the lower electrode through a flexible adhesive layer.

7. The double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The electrode layer further includes a flexible adhesive layer disposed between the lower electrode and the cooling pipe, the flexible adhesive layer being used to fix the relative position of the electrode layer and the cooling pipe.

8. The double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: A coolant transport plane channel is formed inside the cooling pipe, and the light emitter is disposed in the coolant transport plane channel and flows with the coolant.

9. A double-layer electroluminescent dimming film for starry sky display based on flow cooling according to claim 1, characterized in that: The columnar spacer layer has a straight tubular structure and extends along the thickness direction of the dichroic dye region layer.

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