Circuit board structure of three-wire double-color lamp strip

Abstract

The utility model provides a circuit board structure of a three-wire double-color lamp strip, which comprises a circuit board body, a main circuit is printed on the circuit board body, the main circuit is periodically designed, and the main circuit comprises a positive main line and a negative main line which are arranged along the length direction of the circuit board body and are respectively a first positive circuit, a first negative circuit and a second negative circuit. The main circuit is formed by connecting a plurality of subunits of the same structure in parallel, the subunits are arranged at equal intervals in the length direction of the circuit board body, a chip circuit is arranged between a first positive electrode circuit and a first negative electrode circuit in each subunit and used for being connected with an LED chip, the first positive electrode circuit is arranged above the chip circuit, and the first negative electrode circuit is arranged below the chip circuit. The second cathode circuit is arranged below the first cathode circuit, the chip circuit is provided with a first welding spot used for welding an LED chip, and the tail ends of the first cathode circuit and the second cathode circuit are in bridging connection through a resistor chip. According to the circuit board structure of the three-wire double-color lamp strip, a single-sided board structure is adopted, and the first negative electrode circuit and the second negative electrode circuit are bridged through the resistor chips, so that the second negative electrode circuit of the last chip in each subunit is connected and conducted with the main circuit; therefore, the circuit board is not limited by the double-sided board structure, the processing procedures and steps of the circuit board are effectively saved, the production and manufacturing cost is reduced, and the processing efficiency of the circuit board is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of light strip production, in particular to a circuit board structure of a three-wire two-color light strip. Background Art

[0002] LED light strip refers to LEDs assembled on a strip-shaped FPC (flexible circuit board) or PCB hard board. It is named because its product shape is like a strip. The FPC board used in the existing two-color LED light strip with a three-line structure adopts a double-sided board through vias to make the upper and lower layers of the line conductive. During the process of production, some vias will be blocked or blind holes will be generated. In addition, the production process of double-sided boards is complicated, with many production steps, and the production cycle is one-third longer than that of single-sided boards, and the production capacity is relatively low. Utility Model Content

[0003] The utility model aims to provide a circuit board structure of a three-wire two-color light strip to solve the technical problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] A circuit board structure for a three-wire two-color light strip comprises a circuit board body, on which a main circuit is printed, the main circuit is periodically designed, the main circuit comprises positive and negative main lines arranged along the length direction of the circuit board body, which are respectively a first positive line, a first negative line and a second negative line, the first positive line, the first negative line and the second negative line are arranged in parallel with each other, the main line is divided into a plurality of sub-units with the same structure and connected in parallel, the sub-units are arranged equidistantly along the length direction of the circuit board body, a chip line is provided between the first positive line and the first negative line in each of the sub-units for connecting an LED chip, the first positive line is above the chip line, the first negative line is below the chip line, the second negative line is below the first negative line, a first soldering point for soldering an LED chip is provided on the chip line, and the ends of the chip line and the second negative line are bridged and connected through a resistor chip.

[0006] A row of first windows is provided in the subunit, and a second window, a third window and a fourth window are provided at the left and right ends of the subunit respectively, the second window, the third window and the fourth window correspond to the positions of the first positive electrode circuit, the first negative electrode circuit and the second negative electrode circuit respectively, the second window, the third window and the fourth window have the same structure, and the second window, the third window and the fourth window are arranged in parallel.

[0007] The ends of the chip circuit and the second negative electrode circuit are respectively provided with a second welding point and a third welding point for welding the resistor chip.

[0008] A solder resist ink layer is provided between the second solder joint and the third solder joint, and the resistor chip is welded to the second solder joint and the third solder joint across the solder resist ink layer.

[0009] The resistor chip uses a 0603 resistor.

[0010] The solder resist oil film layer is made of graphite ink or metal ink.

[0011] Compared with the prior art, the circuit board structure of a three-wire two-color light strip in the present application adopts a single-panel structure, and the first negative pole circuit and the second negative pole circuit are bridged by a resistor chip, so that the second negative pole circuit of the last chip in each sub-unit is connected and conducted with the main circuit, so that the circuit board is not restricted by the double-panel structure, effectively saving the processing procedures and steps of the circuit board, reducing the production cost, and improving the processing efficiency of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : Schematic diagram of the circuit board structure of this application;

[0013] Figure 2 : Window structure diagram of the circuit board in this application;

[0014] Figure 3 : A diagram of a single subunit structure in this application;

[0015] Figure 4 : Figure 3 The enlarged view of point B in the figure;

[0016] Figure 5 : Structural diagram of the window opening in a single subunit in this application. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] Specific embodiment 1: Please refer to Figures 1 to 5In the embodiment of the utility model, a circuit board structure of a three-wire two-color light strip includes a circuit board body 1, a main circuit is printed on the circuit board body 1, and the main circuit is periodically designed. The main circuit includes positive and negative main lines arranged along the length direction of the circuit board body 1, which are respectively a first positive line 2, a first negative line 3, and a second negative line 4. The first positive line 2, the first negative line 3, and the second negative line 4 are arranged in parallel with each other. The main line is divided into a plurality of sub-units A with the same structure and connected in parallel. The sub-units A are arranged equidistantly along the length direction of the circuit board body 1, and each sub-unit A chip circuit 5 is provided between the first positive circuit 2 and the first negative circuit 3 in A for connecting the LED chip. The first positive circuit 2 is above the chip circuit 5, and the first negative circuit 3 is below the chip circuit 5. The first positive circuit 2 and the first negative circuit 3 are both connected to the chip circuit 5. The second negative circuit 4 is below the first negative circuit 3. A first welding point 501 for welding the LED chip is provided on the chip circuit 5. The ends of the chip circuit 5 and the second negative circuit 4 are bridged and connected through a resistor chip 11. In this embodiment, the resistor chip 11 adopts a 0603 type resistor.

[0019] A row of first windows 6 is provided in the subunit A, and a second window 7, a third window 8 and a fourth window 9 are provided at the left and right ends of the subunit A respectively. The second window 7, the third window 8 and the fourth window 9 correspond to the positions of the first positive electrode circuit 2, the first negative electrode circuit 3 and the second negative electrode circuit 4 respectively. The second window 7, the third window 8 and the fourth window 9 have the same structure. The first window 6 is between the second window 7 and the third window 8, and the first window 6 corresponds to the position of the chip circuit 5.

[0020] The ends of the chip circuit 5 and the second negative electrode circuit are respectively provided with a second welding point 502 and a third welding point 401 for welding the resistor chip 11 .

[0021] A solder resist ink layer 10 is provided between the second solder joint 502 and the third solder joint 401, and the resistor chip 11 is welded to the second solder joint 502 and the third solder joint 401 across the solder resist ink layer 10. The solder resist oil film layer is made of graphite ink or metal ink. The solder resist ink layer 10 is provided to effectively avoid short circuits between solder joints and protect the stability and reliability of the circuit.

[0022] In addition, a cutting line is also provided on the circuit board body 1 of the present application, and the cutting line is provided along the width direction of the circuit board body 1 and at the position of the second window 7. In the present application, each subunit A forms a single LED chip circuit, and the circuit layout is rationalized so that each LED chip circuit can work independently. The user can cut the light strip circuit board according to the needs to adjust the use length of the light strip, which is more convenient to use.

[0023] Compared with the prior art, the circuit board structure of a three-wire two-color light strip in the present application adopts a single-panel structure, and the first negative pole circuit and the second negative pole circuit are bridged by a resistor chip, so that the second negative pole circuit of the last chip in each sub-unit is connected and conducted with the main circuit, so that the circuit board is not restricted by the double-panel structure, effectively saving the processing procedures and steps of the circuit board, reducing the production cost, and improving the processing efficiency of the circuit board.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A circuit board structure of a three-wire two-color light strip, characterized in that: The invention comprises a circuit board body, on which a main circuit is printed, wherein the main circuit is periodically designed, wherein the main circuit comprises positive and negative main lines arranged along the length direction of the circuit board body, which are respectively a first positive line, a first negative line and a second negative line, wherein the first positive line, the first negative line and the second negative line are arranged in parallel with each other, wherein the main line is divided into a plurality of sub-units with the same structure and connected in parallel, wherein the sub-units are arranged equidistantly along the length direction of the circuit board body, wherein a chip line is provided between the first positive line and the first negative line in each sub-unit for connecting an LED chip, wherein the first positive line is above the chip line, the first negative line is below the chip line, and the second negative line is below the first negative line, wherein a first soldering point for soldering an LED chip is provided on the chip line, and the ends of the chip line and the second negative line are bridged and connected through a resistor chip.

2. The circuit board structure of a three-wire two-color light strip according to claim 1, characterized in that: A row of first windows is provided in the subunit, and a second window, a third window and a fourth window are provided at the left and right ends of the subunit respectively, the second window, the third window and the fourth window correspond to the positions of the first positive electrode circuit, the first negative electrode circuit and the second negative electrode circuit respectively, the second window, the third window and the fourth window have the same structure, and the second window, the third window and the fourth window are arranged in parallel.

3. The circuit board structure of a three-wire two-color light strip according to claim 2, characterized in that: The ends of the chip circuit and the second negative electrode circuit are respectively provided with a second welding point and a third welding point for welding the resistor chip.

4. The circuit board structure of a three-wire two-color light strip according to claim 3, characterized in that: A solder resist ink layer is provided between the second solder joint and the third solder joint, and the resistor chip is welded to the second solder joint and the third solder joint across the solder resist ink layer.

5. The circuit board structure of a three-wire two-color light strip according to claim 4, characterized in that: The resistor chip uses a 0603 resistor.

6. The circuit board structure of a three-wire two-color light strip according to claim 5, characterized in that: The solder resist ink layer is made of graphite ink or metal ink.

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