LED lamp circuit board for integrating light source and power supply and manufacture method thereof

[0040] Example one:

[0041] Such as Figure 1 ~ Figure 5 , Figure 7 , Picture 8 As shown, the LED lamp circuit board integrating light source and power supply of this embodiment includes two module unit boards 1, which are fixedly connected to each other, and the front side of the module unit board 1 is provided for fixing The LED chip 2 and the metal layer 13 that dissipates heat and constitutes an electrical connection between the LED chips 2, and the back of the module unit board 1 is provided with a power supply line 14 made of conductive metal for soldering circuit elements and forming a circuit. The power lines 14 of the fixedly connected module unit board 1 are electrically connected by jumpers. Both ends of the module unit board 1 are respectively provided with grooves 11 and bumps 12, and the grooves 11 and The size and shape of the bump 12 are adapted, the groove 11 and the bump 12 are both dovetail-shaped, and the connection is reliable. The module unit board 1 passes through the groove 11 and the The bumps 12 are fitted and fixedly connected. Each module unit board 1 is provided with two LED chips 2 and each module is provided with 48 LED chips 2; two modules on the two module unit boards 1 The LED chips 2 are connected in series, and each circuit has 96 LED chips 2 in series. The rated power of this embodiment is 12W, and it is applied to 220V AC power supply for lighting. The module unit board 1 is a double-layer circuit board. , The metal layer 13 is a positive terminal 1a and a negative terminal 1b at both ends of the module unit board 1, respectively, and the power line 14 is provided with a positive terminal 2a at both ends of the module unit board 1, respectively , The negative terminal 2b, the positive terminal 2a and the positive terminal 1a are electrically connected through a metal perforation, and the negative terminal 2b and the negative terminal 1b are electrically connected through a metal perforation, that is, The positive terminal 2a is at the same potential as the positive terminal 1a, and the negative terminal 2b is at the same potential as the negative terminal 1b. The power line 14 further includes a ground connection 2d, a rectified positive connection 2e, and two An AC power input terminal 2c; the circuit of this embodiment includes a rectifier bridge stack D1, a filter capacitor C1, a bleeder resistor R1, a fuse F1, two constant current source MOS devices Q1, Q2, and two constant current source MOS devices Q1 and Q2 are connected in series with two LED chips 2 respectively, wherein the rectifier bridge stack D1, the filter capacitor C1, the bleeder resistor R1, and the fuse F1 are connected to the power line of the first module unit board 1. 14, the two constant current source MOS devices Q1 and Q2 are connected to the power line 14 of the second module unit board 1, and the two AC power input terminals 2c of the first module unit board 1 are directly connected to the 220V AC power supply Phase electrical connection. The two positive terminals 2a on the first module unit board 1 and the rectified positive connection 2e are connected through the jumper 15 to realize the rectified positive connection 2e and the two LED chips 2 The positive terminal 1a is connected, and the ground connection 2d of the first module unit board 1 is connected to the ground connection 2d of the second module unit board 1 through another jumper 16, and another jumper 17 is used to connect Two negative terminals of the first module unit board 1 2b are respectively connected to the two positive terminals 2a of the second module unit board 1, so as to realize the same-circuit series connection between the LED chips 2 on the two different module unit boards 1, and then connect the first The two negative terminals 2b of the two module unit boards 1 are respectively connected to the drain wires of the two constant current source MOS devices Q1, Q2 to realize the connection of the two constant current source MOS devices Q1, Q2. The drain is connected to the negative terminal 1b of the two LED chips 2 to form a loop. Through the arrangement of the power supply line 14 described above, it is only necessary to properly connect the jumper wires 15-18 to achieve the same structure and modular connection. produce.

[0042] Such as Picture 11 As shown, the manufacturing method of the LED lamp circuit board integrating light source and power supply in this embodiment is to make a prefabricated circuit board into a piece according to the length of one module unit board 1 and the total width of the four module unit boards 1. , The prefabricated circuit board is provided with the laid metal layer 13 and the power line 14 and the connection parts for fixed connection, namely the groove 11 and the bump 12 are prefabricated. The entire circuit board is sent to a placement machine for placement, the LED chip 2 is attached to the metal layer 13, and then the electrode of the LED chip 2 is connected to the corresponding metal layer 13 with metal wire. Then the LED chips 2 are coated with phosphor powder and silica gel and cured by baking. The module unit board 1 is cut into separate parts along the length direction, and then each of the module unit boards 1 The power lines 14 of the module unit board 1 that are fixedly connected are electrically connected through the jumpers 15-18, and the circuit components are soldered to all of them. The power line 14 is on.

[0043] Such as Picture 10 As shown, the LED lamp circuit board integrating light source and power supply of this embodiment is applied to an LED lamp tube. The LED lamp tube includes a transparent plastic front lamp housing 100, a metal rear lamp housing 200 for heat dissipation, Two plugs 300 for installation and electrical connection with the lamp holder, the front lamp housing 100 and the rear lamp housing 200 are plugged and fixed to form a cavity, and the LED lamp integrating light source and power supply The circuit board (including the two module unit boards 1) is located in the cavity, and the two plugs 300 are respectively fixed to the two ends of the front lamp housing 100 and the rear lamp housing 200, and the front lamp housing 100 is provided with two opposite slots 103 extending in the axial direction. The LED lamp circuit board integrating light source and power supply is inserted and fixed in the slots 103, and the integrated light source and power supply The LED lamp circuit board is isolated from the rear lamp housing 200 by the front lamp housing 100, the front lamp housing 100 is a plastic profile, the rear lamp housing 200 is an aluminum alloy profile, of course it can also be other metals The profile can be cut according to the required length, with high production efficiency and quick and easy assembly. The outer wall of the rear lamp housing 200 is provided with a number of heat dissipation protrusions to help increase the heat dissipation area and improve the heat dissipation effect.

[0044] Embodiment two:

[0045] Such as Figure 1 ~ Figure 4 , Image 6 , Figure 7 , Figure 9~Figure 11 As shown, the wiring of the metal layer 13 and the power line 14 of the module unit board 1 in this embodiment is the same as that of the first embodiment, that is, the bare board is the same. In addition, the LEDs on the front of the module unit board 1 The number and arrangement of the chips 2 are also completely the same. The difference is: in this embodiment, the two LED chips 2 on the module unit board 1 are connected in parallel to form a group, and the two groups are connected in parallel, that is, there are four channels in parallel. The LED chips 2 are connected in parallel, each of which has 48 LED chips 2. The rated power of this embodiment is also 12W, which is applied to 110V AC power supply for lighting purposes. Accordingly, this embodiment has two groups of four The constant current source MOS devices Q1, Q2 are connected in series with each of the 48 LED chips 2 respectively, so the four constant current source MOS devices Q1, Q2 are respectively connected to the first and second module units On the power line 14 of the board 1; in addition, the jumper at the connection between the tail of the first module unit board 1 and the head of the second module unit board 1 is also different from the first embodiment. In this embodiment, the second The two positive terminals 2a of each module unit board 1 are connected to the rectified positive terminal 2e through a jumper 15, and the positive terminal 2e of the first module unit board 1 is connected to the positive terminal of the second module unit board 1. The connection 2e is connected through a jumper 19 to realize the parallel connection of the two LED chips 2 of the second module unit board 1 with the two LED chips 2 of the first module unit board 1. The jumper is also used in this embodiment 16 Connect the ground connection 2d of the first module unit board 1 with the ground connection 2d of the second module unit board 1, and the two negative terminals 2b of the first module unit board 1 and the second module The two positive terminals 2a of the unit board 1 are not connected. In addition, the two negative terminals 2b of the first module unit board 1 are connected to the two constant current source MOS devices Q1 and Q2 through another jumper 18. The drain wires are connected to realize that the drains of the two constant current source MOS devices Q1 and Q2 on the first module unit board 1 are connected to the negative terminals 1b of the two LED chips 2 to form a loop. The jumper wires are connected so that there are four LED chips 2 in parallel in this embodiment, and each LED chip 2 has 48 LED chips 2 in parallel.

[0046] The remaining features of this embodiment are the same as the first embodiment.

[0047] The bare boards of the first embodiment and the second embodiment of the present invention can be used for both 110V and 220V alternating current, so they can adapt to different voltages and can also save plate making costs.

[0048] Example three:

[0049] Such as Picture 12 As shown, the difference between this embodiment and the first embodiment is: in this embodiment, two grooves 11 and two bumps 12 are respectively provided at both ends of each module unit board 1. , The groove 11 and the protrusion 12 are both circular, and the connection is reliable.

[0050] The remaining features of this embodiment are the same as the first embodiment.