Integrated circuit light-emitting diode (LED) indicator board capable of being used for switch display

Abstract

The utility model discloses an integrated circuit light-emitting diode (LED) indicator board capable of being used for switch display, which adopts high-temperature-resistant plastic as a substrate, a metal sheet is fixed on the substrate, and a chip, a circuit component and a power supply are respectively and electrically connected with the metal sheet. The high-temperature-resistant plastic is adopted as the substrate, the conductive metal sheet is arranged on the surface of the substrate to achieve connection of the chip and the electronic component, the high-temperature-resistant plastic substrate replaces a traditional circuit board such as an epoxy board, the whole LED indicator board can be suitable for a high-temperature environment, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED indicator lights, and in particular relates to an integrated circuit LED indicator board which can be used for switch display. Background Art

[0002] LED indicator lights can be directly soldered on the circuit board that needs the indicator light, or epoxy board (FR-4) can be used as the circuit substrate to make an integrated board for the indicator light. However, the working temperature of epoxy board is generally between 120℃-150℃, the maximum temperature is generally 170℃, and the long-term temperature resistance is about 120℃. However, in some high-temperature environments, LED indicator boards made of ordinary epoxy boards cannot meet the use requirements. Utility Model Content

[0003] The technical problem solved by the utility model is to provide an integrated integrated circuit LED indicator board which uses high temperature resistant plastic to replace the traditional PCB circuit board and is suitable for use under high temperature conditions and can be used for switch display.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] The invention discloses an integrated circuit LED indicator board which can be used for switch display. The high temperature resistant plastic is used as a substrate. A metal sheet is fixed on the substrate. A chip, circuit components and a power supply are electrically connected to the metal sheet respectively.

[0006] Furthermore, a plurality of metal sheets are arranged on the front side of the substrate for welding chips and resistors.

[0007] Furthermore, the metal sheet on the front side of the substrate includes a first metal sheet, a second metal sheet and a third metal sheet, the first metal sheet is connected to the positive electrode of the power supply, and the third metal sheet is connected to the negative electrode of the power supply.

[0008] Furthermore, the first metal sheet and the second metal sheet are connected via a resistor R1.

[0009] Furthermore, the chip integrated with the light emitting diode is arranged on the third metal sheet, the cathode of the chip is electrically connected to the third metal sheet, and the anode of the chip is connected to the second metal sheet.

[0010] Furthermore, a first polarity metal sheet and a second polarity metal sheet are provided on the back side of the substrate, the first polarity metal sheet is electrically connected to the first metal sheet, and the second polarity metal sheet is electrically connected to the third metal sheet.

[0011] Furthermore, the first polarity metal sheet is electrically connected to the first metal sheet through a first via hole, and the second polarity metal sheet is electrically connected to the third metal sheet through a second via hole.

[0012] Furthermore, the metal sheet is connected to the substrate by mechanical fixing, chemical fixing or thermal fixing.

[0013] Furthermore, the metal sheet is electroplated or sprayed on the surface of the substrate.

[0014] Furthermore, a shell is arranged above the substrate, and a lampshade is arranged on the shell.

[0015] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0016] The integrated circuit LED indicator board that can be used for switch display of the utility model adopts high temperature resistant plastic as a substrate, and a conductive metal sheet is arranged on the surface of the substrate to realize the connection between the chip and the electronic components. The high temperature resistant plastic substrate replaces the traditional circuit board such as epoxy board (FR-4), so that the whole LED indicator board can be used in high temperature environment, the service life is improved, and it is relatively environmentally friendly and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front structure of an integrated circuit LED indicator board that can be used for switch display;

[0018] Figure 2 This is a schematic diagram of the reverse structure of an integrated circuit LED indicator board that can be used for switch display;

[0019] Figure 3 yes Figure 1 AA section view;

[0020] Figure 4 The invention is a structural schematic diagram of an integrated circuit LED indicator board provided with a housing and a lampshade. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1-3 As shown, an integrated circuit LED indicator board that can be used for switch display mainly includes a substrate 1, a chip 2, a plurality of metal sheets, and circuit components, etc. A high temperature resistant plastic is used as the substrate 1, the metal sheet is fixed on the substrate 1, and the chip 2, the circuit components and the power supply are electrically connected to the metal sheet respectively.

[0023] A number of metal sheets are arranged on the front of the substrate 1 for welding the chip 2 and the resistor R1; a metal sheet is also arranged on the back for connecting with the circuit board where the indicator light needs to be arranged, and is mainly used to connect the positive and negative electrodes of the power supply. The metal sheets on the front of the substrate 1 include a first metal sheet 3, a second metal sheet 4 and a third metal sheet 5. The first metal sheet 3 is connected to the positive or negative electrode of the power supply, and the third metal sheet 5 is connected to the positive or negative electrode of the power supply. When the chip is powered, the chip does not distinguish between the positive and negative electrodes, so welding can be conveniently performed. In this embodiment, the first metal sheet 3 is connected to the positive electrode of the power supply, and the third metal sheet 5 is connected to the negative electrode of the power supply.

[0024] A first polarity metal sheet 6 and a second polarity metal sheet 7 are provided on the back of the substrate 1. The first polarity metal sheet 6 is electrically connected to the first metal sheet 3 through a first via hole 8, and the second polarity metal sheet 7 is electrically connected to the third metal sheet 5 through a second via hole 9. Vias are provided at corresponding positions on the substrate 1 to electrically connect the metal sheet on the back of the substrate 1 with the metal sheet on the front of the substrate 1.

[0025] The chip 2 integrated with the light emitting diode is arranged on the third metal sheet 5, one end of the chip 2 is electrically connected to the third metal sheet 5, and the other end of the chip 2 is connected to the second metal sheet 4. The chip of Sanan or Qianzhao Optoelectronics, 8AR, 918B, 912G and other models, this application does not improve the LED chip, and uses commercially available chips.

[0026] The first metal sheet 3 and the second metal sheet 4 are connected via a resistor R1 , the resistance of which is 250K to 680K and is set as required. The power supply is connected to the second metal sheet 4 via the resistor R1 , and then the chip 2 is powered by the second metal sheet 4 .

[0027] The metal sheet is connected to the substrate 1 by mechanical fixing, chemical fixing or thermal fixing. The mechanical fixing method is to set a slot on the substrate and embed the metal sheet into the slot for fixing. It is more conventional, and the slot is not shown in the figure. The chemical fixing method is to fix the metal sheet on the substrate with high temperature resistant glue or adhesive. The thermal fixing method is to fix the metal sheet on the substrate 1 by high temperature welding. All three methods can be used, and can be selected according to the application or cost requirements.

[0028] Alternatively, the metal sheet is electroplated or sprayed on the surface of the substrate 1. The electroplating method can achieve a metal-like appearance and texture by electroplating on the surface of the substrate. The electroplating layer can be a conductive metal such as copper, and a conductive metal layer is formed on the plastic surface by vacuum evaporation and magnetron sputtering. The metal spraying method uses a high-speed particle flow of molten metal to spray on the surface of the substrate 1, which is suitable for occasions where complex structure surface treatment is required.

[0029] The LED indicator board of the utility model can only use a substrate and a metal sheet, and then set a chip and a resistor. Figure 4 As shown, a housing 10 may be disposed above the substrate, and a lampshade 11 may be disposed on the housing 8 to form a complete packaging structure, which may be selected according to customer needs.

[0030] The high temperature resistant plastic substrate of the utility model needs to be able to withstand a temperature of 280°C to meet the use requirements. The high temperature resistant plastic substrate can be made of high temperature resistant plastics such as Teflon PTFE (polytetrafluoroethylene) or LCP (liquid crystal polymer).

[0031] Teflon is used in low temperature -196℃ and high temperature 300℃, and has weather resistance and anti-aging. After practical application, if it is placed at a high temperature of 250℃ for 200 days continuously, not only the strength will not decrease, but also the weight will not decrease; the weight will only decrease by about 0.6% when placed at a high temperature of 350℃ for 120 hours; it can maintain its original softness at an ultra-low temperature of -180℃. It is resistant to chemical corrosion and can withstand corrosion from strong acids, strong alkalis, aqua regia and various organic solvents. It has high insulation performance (small dielectric constant: 2.6, tangent below 0.0025), UV protection, anti-static, fire retardant, and is suitable as the substrate material of the utility model.

[0032] LCP (liquid crystal polymer) has excellent thermal stability, heat resistance and chemical resistance, and is also excellent in wear resistance and friction reduction. LCP has excellent flame retardancy and can extinguish flames without continuing to burn. LCP has excellent electrical insulation properties. Its dielectric strength is higher than that of general engineering plastics, and its arc resistance is good. Its electrical properties are not affected at a continuous use temperature of 200-300°C, and its intermittent use temperature can reach about 316°C, which is also suitable as the substrate material of the utility model.

[0033] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An integrated circuit LED indicator board that can be used for switch display, characterized in that: A high temperature resistant plastic is used as a substrate (1), a metal sheet is fixed on the substrate (1), and a chip (2), circuit components and a power source are electrically connected to the metal sheet respectively.

2. The integrated circuit LED indicator board for switch display according to claim 1, characterized in that: A plurality of metal sheets are arranged on the front side of the substrate (1) for welding the chip (2) and the resistor.

3. The integrated circuit LED indicator board for switch display according to claim 2, characterized in that: The metal sheet on the front side of the substrate (1) comprises a first metal sheet (3), a second metal sheet (4) and a third metal sheet (5), wherein the first metal sheet (3) and the third metal sheet (5) are respectively connected to the positive electrode or the negative electrode of a power source.

4. The integrated circuit LED indicator board for switch display according to claim 3, characterized in that: The first metal sheet (3) and the second metal sheet (4) are connected via a resistor R1.

5. The integrated circuit LED indicator board for switch display according to claim 1, characterized in that: A chip (2) integrated with a light emitting diode is arranged on a third metal sheet (5); one end of the chip (2) is electrically connected to the third metal sheet (5); and the other end of the chip (2) is connected to the second metal sheet (4).

6. The integrated circuit LED indicator board for switch display according to claim 3, characterized in that: A first polarity metal sheet (6) and a second polarity metal sheet (7) are provided on the back side of the substrate (1); the first polarity metal sheet (6) is electrically connected to the first metal sheet (3), and the second polarity metal sheet (7) is electrically connected to the third metal sheet (5).

7. The integrated circuit LED indicator board for switch display according to claim 6, characterized in that: The first polarity metal sheet (6) is electrically connected to the first metal sheet (3) through a first via hole (8), and the second polarity metal sheet (7) is electrically connected to the third metal sheet (5) through a second via hole (9).

8. The integrated circuit LED indicator board for switch display according to claim 1, characterized in that: The metal sheet is connected to the substrate (1) by mechanical fixing, chemical fixing or thermal fixing.

9. The integrated circuit LED indicator board for switch display according to claim 1, characterized in that: The metal sheet is electroplated or sprayed on the surface of the substrate (1).

10. The integrated circuit LED indicator board for switch display according to claim 1, characterized in that: A housing (10) is arranged above the substrate, and a lampshade (11) is arranged on the housing (10).

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