CN219107750U - Flexible circuit board for LED lamp strip - Google Patents
Flexible circuit board for LED lamp strip Download PDFInfo
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- CN219107750U CN219107750U CN202222112804.3U CN202222112804U CN219107750U CN 219107750 U CN219107750 U CN 219107750U CN 202222112804 U CN202222112804 U CN 202222112804U CN 219107750 U CN219107750 U CN 219107750U
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- film layer
- circuit board
- flexible circuit
- conductive polymer
- lamp strip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a flexible circuit board for an LED lamp strip, and relates to the field of circuit boards. The flexible circuit board of the LED lamp strip comprises a covering film layer, a first composite adhesive layer, a conductive polymer film layer, a second composite adhesive layer and a bottom film layer which are sequentially arranged from top to bottom. The flexible circuit board for the LED lamp strip uses the conductive polymer film layer to replace the traditional metal circuit, so that the defects of high specific gravity, easy corrosion and the like of the flexible circuit board can be overcome, and the flexible circuit board is not easy to droop when being used as an overhead decoration scheme; as an outdoor decorative lamp strip, the lamp strip is not easy to rust and damage under the condition of contacting air and water.
Description
Technical Field
The utility model belongs to the field of circuit boards, and particularly relates to a flexible circuit board for an LED lamp strip.
Background
A flexible circuit board (FPC) is a printed circuit made of a flexible insulating substrate. In recent years, the importance of a soft circuit structure is obviously improved, and compared with a hard circuit structure, the soft circuit structure has the advantages of light weight, high design operation flexibility, high fault tolerance, high reliability and the like.
The flexible circuit board is used as the sub industry with the fastest speed increase in the printed circuit board, and the development is optimistic. According to data statistics, global FPC market scale reaches 919 hundred million yuan in 2019. By 2025, the global market scale of FPC is expected to reach 1900 billions of yuan, and the development is rapid.
The market demand of the Chinese FPC is mainly influenced by the development of the smart phone market, and the scale of the FPC rapidly expands along with the increase of the delivery of the smart phone. According to statistics from 2014 to 2016, the output of the Chinese smart phone is continuously increased, and the output of the Chinese smart phone is increased from 3.9 hundred million in 2014 to 5.2 hundred million in 2016, so that a great deal of demands are brought to the upstream FPC industry. And in 2017 to 2018, the commodity output of the Chinese smart phone falls back, so that the speed of the FPC industry is increased and slowed down. The market scale (counted according to the production value) of the Chinese FPC in 2014 to 2018 is increased from 290.7 hundred million Yuanren nationality to 471.7 hundred million Yuanren nationality, and the annual compound growth rate is up to 12.9%. As the main application field of FPC downstream, smart phone markets tend to saturate, and FPC demand increases speed to some extent. The development of novel electronic products such as wearable equipment and automobile electronics provides new growth power for the FPC industry, and the market scale of the Chinese FPC in 2023 is expected to be increased to 583.2 hundred million Yuan people's coins. The market size of the future Chinese FPC industry is increased mainly based on the following reasons: the novel consumer electronics products are rapidly growing, and FPG is coming to have a wide development space; automobile electronics gradually become an important application field of FPC, and bring wide market prospect for the FPC; the global electronic information industry center of gravity shifts to provide development opportunities for the local FPC enterprises in China.
The flexible circuit board for the LED lamp strip is used as one branch, and the LED lamp strip is widely used in various fields. However, in the prior art, a flexible circuit board for an LED strip uses copper foil as a base wire of the strip. Copper is used as a conducting wire, and has the advantages of excellent conductivity, good flexibility and the like. However, copper wires have the defects of high specific gravity, easy corrosion and the like, and are too heavy to sag as an overhead decoration scheme; as an outdoor decorative lamp band, the lamp band is easily rusted under the conditions of long-term contact with air and water and sun exposure and aging of a lamp band shell, and finally the lamp band is damaged.
Disclosure of Invention
In order to overcome the defects in the prior art, the technical problems to be solved by the utility model are as follows: a flexible circuit board for an LED lamp strip is light in weight and not easy to rust.
In order to solve the technical problems, the utility model adopts the following technical scheme: a flexible circuit board for LED lamp area, includes from top to bottom cover rete, first compound glue film, conductive polymer rete, second compound glue film and the bottom rete that sets gradually.
Wherein the conductive polymer film layer is enclosed by a cover film layer and a bottom film layer.
Wherein the conductivity of the conductive polymer film layer is 55-65S/cm.
Wherein the thickness of the conductive polymer film layer is 0.025-0.05 mm.
Wherein, the covering film layer is a PI film layer.
Wherein the thickness of the covering film layer is 0.025-0.05 mm.
Wherein, the bottom film layer is a PET film layer.
Wherein the thickness of the bottom film layer is 0.025-0.05 mm.
Wherein the thickness of the first composite adhesive layer and the second composite adhesive layer is 0.02-0.04 mm.
Wherein the applicable temperature range of the first composite adhesive layer and the second composite adhesive layer is-50 ℃ to 80 ℃.
The utility model has the beneficial effects that: the flexible circuit board for the LED lamp strip uses the conductive polymer film layer to replace the traditional metal circuit, so that the defects of high specific gravity, easy corrosion and the like of the flexible circuit board can be overcome, and the flexible circuit board is not easy to droop when being used as an overhead decoration scheme; as an outdoor decorative lamp strip, the lamp strip is not easy to rust and damage under the condition of contacting air and water.
Drawings
Fig. 1 is a schematic view showing the structure of a flexible circuit board for an LED strip according to embodiment 1 of the present utility model;
fig. 2 is a physical cross-sectional view of a flexible circuit board for an LED strip according to embodiment 1 of the present utility model;
description of the reference numerals: 1. a PI film layer; 2. a first composite glue layer; 3. a conductive polymer film layer; 4. a second composite glue layer; 5. PET film layer.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
The most critical concept of the utility model is as follows: the conductive polymer film layer is used for replacing the traditional metal circuit, so that the defects of high specific gravity, easy corrosion and the like of the conductive polymer film layer can be overcome.
Referring to fig. 1 to 2, the flexible circuit board for an LED light strip of the present utility model includes a cover film layer, a first composite adhesive layer, a conductive polymer film layer, a second composite adhesive layer and a bottom film layer sequentially disposed from top to bottom.
From the above description, the beneficial effects of the utility model are as follows: by using the conductive polymer film layer as a conductive line, the problem that the dead weight is large and the flexible circuit board is easy to drop downwards when the conventional flexible circuit board is overhead and decorated is solved, and the problems that the conventional flexible circuit board is exposed at a punching welding position or the bottom film layer and the covering film layer are exposed in natural environment for a long time, so that the metal conductive line contacts air, water and the like and the line is easy to rust are solved.
Further, the conductive polymer film layer is enclosed by the cover film layer and the base film layer.
From the above description, the conductive polymer film layer is enclosed by the covering film layer and the bottom film layer, which can provide effective protection and support for the conductive circuit of the conductive polymer film layer, enhance the bending resistance of the flexible circuit board, and also play a role in water resistance, thereby enhancing the water resistance of the flexible circuit board and further protecting the circuit of the flexible circuit board.
Further, the conductivity of the conductive polymer film layer is 55-65S/cm. Preferably, the conductivity of the conductive polymer film layer is 58 to 61S/cm.
Further, the thickness of the conductive polymer film layer is 0.025-0.05 mm. Preferably, the thickness of the conductive polymer film layer is 0.03 to 0.04mm.
From the above description, when the conductive polymer film layer is too thin, the circuit is easy to break after bending; too thick is disadvantageous for the weight reduction of the flexible circuit board.
Further, the cover film layer is a PI film layer.
From the above description, the PI film layer can be used for a long time in a wide temperature range of 270 ℃ below zero to 400 ℃, has excellent comprehensive properties of high strength, high insulation, radiation resistance, corrosion resistance and the like, and can prevent the problems of aging, corrosion and the like of the flexible circuit board when the flexible circuit board is exposed in natural environment for a long time.
Further, the thickness of the covering film layer is 0.025-0.05 mm. Preferably, the thickness of the cover film layer is 0.03 to 0.04mm.
From the above description, it is known that the cover film layer is too thin, and the insulating property and the protective property are poor; too thick is disadvantageous for the weight reduction of the flexible circuit board.
Further, the bottom film layer is a PET film layer.
From the above description, it can be seen that the PET film layer has excellent physical and mechanical properties, small thickness tolerance, high heating temperature, low thermal shrinkage and good flexibility, and the PET film layer is used as the bottom film layer of the flexible circuit board, which not only solves the problem of static electricity generated during the transportation of the FPC board, but also prevents the flexible circuit board from being affected by environmental factors such as air, humidity and the like.
Further, the thickness of the bottom film layer is 0.025-0.05 mm. Preferably, the thickness of the base film layer is 0.03-0.04 mm.
From the above description, the thickness of the base film layer is too thin, and the insulating property and the protective property are poor; too thick is disadvantageous for the weight reduction of the flexible circuit board.
Further, the thickness of the first composite adhesive layer and the second composite adhesive layer is 0.02-0.04 mm. Preferably, the thickness of the first and second composite glue layers is 0.025-0.035 mm.
As is apparent from the above description, the thickness of the first and second composite adhesive layers is too thin or too thick, and the adhesive effect is deteriorated.
Further, the applicable temperature range of the first composite adhesive layer and the second composite adhesive layer is-50 ℃ to 80 ℃.
From the above description, the first composite adhesive layer and the second composite adhesive layer have wide applicable temperature ranges, and can be used for a long time in extremely cold and extremely hot environments; the bonding strength is still excellent under the high temperature condition, and the problem that the flexible circuit board is bounced or deformed due to the fact that the bonding strength is reduced caused by heating or higher temperature when the flexible circuit board is used is avoided.
Application scene: overhead decorative and outdoor decorative light belts.
Referring to fig. 1 to 2, a first embodiment of the present utility model is as follows:
a flexible circuit board for LED lamp area, includes from top to bottom sets gradually 0.025 mm's PI rete, 0.02 mm's first compound glue film, 0.025 mm's conductive polymer rete, 0.02 mm's second compound glue film and 0.025 mm's PET rete. The conductive polymer film layer is sealed by the covering film layer and the bottom film layer, the conductivity of the conductive polymer film layer is 55S/cm, and the applicable temperature range of the first composite adhesive layer and the second composite adhesive layer is-50-80 ℃.
The second embodiment of the utility model is as follows:
a flexible circuit board for LED lamp area, includes from top to bottom sets gradually 0.05 mm's PI rete, 0.04 mm's first compound glue film, 0.05mm conductive polymer rete, 0.04 mm's second compound glue film and 0.05 mm's PET rete. The conductive polymer film layer is sealed by the covering film layer and the bottom film layer, the conductivity of the conductive polymer film layer is 65S/cm, and the applicable temperature range of the first composite adhesive layer and the second composite adhesive layer is-50-80 ℃.
The third embodiment of the utility model is as follows:
a flexible circuit board for LED lamp area, includes from top to bottom sets gradually 0.04 mm's PI rete, 0.03 mm first compound glue film, 0.03 mm conducting polymer rete, 0.032 mm second compound glue film and 0.028's mmPET rete. The conductive polymer film layer is sealed by the covering film layer and the bottom film layer, the conductivity of the conductive polymer film layer is 60S/cm, and the applicable temperature range of the first composite adhesive layer and the second composite adhesive layer is-50-80 ℃.
The flexible circuit board for the LED lamp strip solves the problem that the existing flexible circuit board is large in dead weight and easy to drop downwards when overhead decoration is carried out by using the conductive polymer film layer as the conductive circuit, and also solves the problem that the existing flexible circuit board is exposed at a punching welding position or the bottom film layer and the covering film layer are exposed in natural environment for a long time to age, so that the metal conductive circuit is contacted with air, water and the like, and the circuit is easy to rust. The adhesive layer has wide applicable temperature range, can be used for a long time in extremely cold and extremely hot environments, has excellent bonding strength under high temperature conditions, and avoids the problem of material spring-open or deformation caused by the reduction of bonding strength due to heating or higher temperature when the flexible circuit board is used.
The PI film is used for covering the film layer, and the PI film has light weight, strong toughness and high temperature resistance, and can be subjected to reflow soldering and spot soldering after punching, so that the film material is not damaged. The conductive polymer film layer replaces a metal film layer to be used as a wire, so that the conductive wire is light in weight, soft and curled, and rust damage is not worried about the exposed part. The PET film is used as the bottom film layer, the PET film has low price and strong toughness, and the bottom film is not used for excessive post-processing treatment, so that the light and thin low-price PET film is very suitable. The adhesive layer has strong adhesive strength after curing, has strong adhesive force to PI, PET and conductive polymer film layers, and can not cause the defect of bubbling explosion plate at high temperature.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (9)
1. The flexible circuit board for the LED lamp strip is characterized by comprising a covering film layer, a first composite adhesive layer, a conductive polymer film layer, a second composite adhesive layer and a bottom film layer which are sequentially arranged from top to bottom, wherein the thickness of the conductive polymer film layer is 0.025-0.05 mm.
2. The flexible circuit board for an LED strip of claim 1, wherein said conductive polymer film layer is enclosed by a cover film layer and a base film layer.
3. The flexible circuit board for an LED strip of claim 1, wherein said conductive polymer film layer has a conductivity of 55-65S/cm.
4. The flexible circuit board for an LED strip of claim 1, wherein said cover film is a PI film.
5. The flexible circuit board for an LED strip of claim 1, wherein said cover film layer has a thickness of 0.025-0.05 mm.
6. The flexible circuit board for an LED strip of claim 1, wherein said base film layer is a PET film layer.
7. The flexible circuit board for an LED strip of claim 1, wherein said base film layer has a thickness of 0.025-0.05 mm.
8. The flexible circuit board for an LED strip of claim 1, wherein said first and second layers of composite glue have a thickness of 0.02-0.04 mm.
9. The flexible circuit board for an LED strip of claim 1, wherein said first and second layers of composite glue are applied at a temperature ranging from-50 ℃ to 80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222112804.3U CN219107750U (en) | 2022-08-11 | 2022-08-11 | Flexible circuit board for LED lamp strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222112804.3U CN219107750U (en) | 2022-08-11 | 2022-08-11 | Flexible circuit board for LED lamp strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219107750U true CN219107750U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222112804.3U Active CN219107750U (en) | 2022-08-11 | 2022-08-11 | Flexible circuit board for LED lamp strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219107750U (en) |
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2022
- 2022-08-11 CN CN202222112804.3U patent/CN219107750U/en active Active
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