CN207491261U

CN207491261U - A kind of reliable LED module

Info

Publication number: CN207491261U
Application number: CN201721586495.6U
Authority: CN
Inventors: 赵建清; 朱雪君
Original assignee: Shenzhen Xinguang Core Devices Co Ltd
Current assignee: Shenzhen Xinguang Core Devices Co Ltd
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2018-06-12
Anticipated expiration: 2027-11-23

Abstract

The utility model is related to LED display fields；A kind of reliable LED module, described including PCB circuit board and lamp bead, the lamp bead is packaged in by pad in PCB circuit board；The pad is provided with sheet metal, and signal seat and the power socket of the PCB circuit board, which add, is printed on one layer of solder mask；The PCB circuit board includes preventing dead circuit for lamp, anti-surge circuit, signal transmitting and receiving circuit and constant-current circuit, and described to prevent that dead circuit for lamp is electrically connected with the signal transmitting and receiving circuit, the signal transceiver is connect by anti-surge circuit with the constant-current circuit.The utility model provides a kind of reliable LED module, and the pad of original lamp bead encapsulation is expanded by the sheet metal, and solder mask prevents from causing unnecessary short circuit, prevents that dead circuit for lamp makes to be always on during module no signal, anti-surge circuit can inhibit to interfere.

Description

A kind of reliable LED module

Technical field

The utility model is related to LED display fields, especially a kind of reliable LED module.

Background technology

LED is a kind of solid state semiconductor devices, and electricity directly can be converted into light by it, with small, power consumption It is low, service life is long, high brightness, it is low in calories, environmentally friendly, sturdy and durable many advantages, such as, be optimal light source.LED is shown should It becomes increasingly popular, demand increasingly increases outdoor display screen in the market, and the LED display amount of popularizing all is being promoted every year. But in assembling process sequence is produced, display screen easily damages, a few then dozens of yuan, the module damage of how upper hundreds and thousands of members Bad, maintenance cost is high, and the risk for having monoblock to scrap；Because industry pursues high performance-price ratio, to material requirements low cost, use is relatively low Chip and material plank are held, reaches the display effect of such as high-end material, it is necessary to a small amount of electronic component or method, make up material The deficiency of material realizes better cost performance.

Utility model content

For the defects in the prior art, the utility model provides a kind of reliable LED module, is expanded by the sheet metal The big pad of original lamp bead encapsulation, solder mask prevent from causing unnecessary short circuit, prevent that dead circuit for lamp makes module no signal often Bright, anti-surge circuit can inhibit to interfere.

To achieve these goals, a kind of reliable LED module provided by the utility model, it is described including PCB circuit board And lamp bead, the lamp bead are packaged in by pad in PCB circuit board；The pad is provided with sheet metal, the PCB circuit board Signal seat adds with power socket is printed on one layer of solder mask；The PCB circuit board includes preventing dead circuit for lamp, anti-surge circuit, signal Transmission circuit and constant-current circuit, described to prevent that dead circuit for lamp is electrically connected with the signal transmitting and receiving circuit, the signal transceiver passes through anti- Surge circuit is connect with the constant-current circuit.

Further, the signal transmitting and receiving circuit includes 74HC245 chips U1, and the anti-dead circuit for lamp includes resistance R1； One end of the resistance R1 and power supply V_CCIt is connected, the other end of the resistance R1 is connected with the 6th pin of 74HC245 chips U1, The 1st pin and power supply V of the 74HC245 chips U1_CCIt is connected, the 19th pin ground connection of the 74HC245 chips U1.

Further, the constant-current circuit include MBI5124 chips U2, the 16th pin of the 74HC245 chips U1 with The 3rd pin of MBI5124 chips U2 is connected, and the 15th pin of the 74HC245 chips U1 draws with the 4th of MBI5124 chips U2 Foot is connected, and the 14th pin of the 74HC245 chips U1 is connected with the 21st pin of MBI5124 chips U2, the MBI5124 cores The 1st pin ground connection of piece U2, the 23rd pin of the MBI5124 chips U2 after resistance R5 by being grounded, the MBI5124 chips The 20th pin of U2 is connected with the cathode of light emitting diode D1, the 19th pin and light emitting diode of the MBI5124 chips U2 The cathode of D2 is connected, and the 18th pin of the MBI5124 chips U2 is connected with the cathode of light emitting diode D3, the light-emitting diodes The anode of the anode of pipe D1, the anode of light emitting diode D2 and light emitting diode D3 respectively with 4953 chip U3 the 7th, 8 pins Points of common connection be connected, the 4953 chip U3 the 1st, 3 pins and power supply V_CCIt is connected, the 2nd of the 4953 chip U3 draws Foot is connected with the 18th pin of 74HC245 chips U1, the 4th pin of the 4953 chip U3 and the 17th of 74HC245 chips U1 the Pin is connected.

Further, the anti-surge circuit includes resistance R2, resistance R3, resistance R4, capacitance C1, capacitance C2 and capacitance C3；The 16th pin of the 74HC245 chips U1 is connected by resistance R2 with the 3rd pin of MBI5124 chips U2, described The 15th pin of 74HC245 chips U1 is connected by resistance R3 with the 4th pin of MBI5124 chips U2, the 74HC245 chips The 14th pin of U1 is connected by resistance R4 with the 21st pin of MBI5124 chips U2, one end and the resistance R2 of the capacitance C1 It is connected with the points of common connection of the 3rd pin of MBI5124 chips U2, the other end ground connection of the capacitance C1, the capacitance C2's One end is connected with the points of common connection of the 4th pin of resistance R3 and MBI5124 chip U2, the other end ground connection of the capacitance C2, One end of capacitance C3 is connected with the points of common connection of the 21st pin of resistance R4 and MBI5124 chip U2, and the capacitance C3's is another One end is grounded.

Further, the PCB circuit board includes the 3rd pin of interface IN, the interface IN with 74HC245 chips U1's 6th pin is connected, and the 9th pin of the interface IN is connected with the 2nd pin of 74HC245 chips U1, and the 10th of the interface IN the Pin is connected with the 3rd pin of 74HC245 chips U1, the 13rd pin of the interface IN and the 4th pin of 74HC245 chips U1 It is connected, the 15th pin of the interface IN is connected with the 5th pin of 74HC245 chips U1.

Further, the sheet metal is copper sheet.

The beneficial effects of the utility model are：The utility model provides a kind of reliable LED module, passes through the sheet metal The pad of original lamp bead encapsulation is expanded, solder mask prevents from causing unnecessary short circuit, when preventing that dead circuit for lamp makes module no signal It is always on, anti-surge circuit can inhibit to interfere.

Description of the drawings

Fig. 1 is a kind of circuit diagram of reliable LED module embodiment of the utility model.

Specific embodiment

The embodiment of technical solutions of the utility model is described in detail below in conjunction with attached drawing.Following embodiment is only For clearly illustrating the technical solution of the utility model, therefore example is only used as, and cannot this practicality be limited with this Novel protection domain.

As shown in Figure 1, a kind of reliable LED module, described including PCB circuit board and lamp bead, the lamp bead passes through pad It is packaged in PCB circuit board；The pad is provided with sheet metal, and signal seat and the power socket of the PCB circuit board, which add, is printed on one Layer solder mask；The PCB circuit board includes preventing dead circuit for lamp, anti-surge circuit, signal transmitting and receiving circuit and constant-current circuit, described Prevent that dead circuit for lamp is electrically connected with the signal transmitting and receiving circuit, the signal transceiver is connected by anti-surge circuit and the constant-current circuit It connects.

In Design PCB circuit board, metal piece processing is carried out to the pad of PCB circuit board periphery lamp bead, it is suitable in this way In the pad for expanding original lamp bead encapsulation, increase the effective area of sheet metal so as to strengthen the attachment of sheet metal and plank Power prevents lamp bead from being greatly reduced the PCB circuit board report caused by external force by the circuit peeled off during external force collision in PCB circuit board Useless situation.Due to easily destroying ink when hand welds at signal seat and power socket, unnecessary short circuit is caused, by using monoblock white Solder mask adds one layer of print to have double-deck ink around such power socket on signal seat and power socket, solve solder mask The problem of destructible, and visual appearance.Prevent that dead circuit for lamp is always in module no signal.Even if pass through the anti-surge circuit Client's wiring is less perfect, and the chip less high-performance of cooperation is also the same to inhibit interference, the display effect got well.

In the present embodiment, the signal transmitting and receiving circuit includes 74HC245 chips U1, and the anti-dead circuit for lamp includes resistance R1；One end of the resistance R1 and power supply V_CCIt is connected, the 6th pin phase of the other end and 74HC245 chips U1 of the resistance R1 Even, the 1st pin and power supply V of the 74HC245 chips U1_CCIt is connected, the 19th pin ground connection of the 74HC245 chips U1.Institute It is reasonable to state anti-dead circuit for lamp design simple layout, by a 4.7K pull-up resistor R1, from signal seat point of incoming cables and 74HC245 OE signals pull-up before chip U1.Accordingly even when in the case of no signal or signal floating, 74HC245 chip U1 output terminals Also high level can be moved to, so as to turn off constant-current circuit OE, lamp will not again can be bright, and when there is signal, signal has the ability to drive OE Normally-open constant-current circuit OE, is independent of each other.It needs to illustrate, 74HC245 used by the signal transmitting and receiving circuit Chip is only a kind of embodiment involved in the present embodiment, is considering the external factor such as production cost client actual needs It can carry out being changed to other model signal chips, as long as ensureing LED module normal work.

In the present embodiment, the constant-current circuit includes MBI5124 chips U2, the 16th pin of the 74HC245 chips U1 It is connected with the 3rd pin of MBI5124 chips U2, the 15th pin of the 74HC245 chips U1 and the 4th of MBI5124 chips U2 the Pin is connected, and the 14th pin of the 74HC245 chips U1 is connected with the 21st pin of MBI5124 chips U2, the MBI5124 The 1st pin ground connection of chip U2, the 23rd pin of the MBI5124 chips U2 after resistance R5 by being grounded, the MBI5124 cores The 20th pin of piece U2 is connected with the cathode of light emitting diode D1, the 19th pin and light-emitting diodes of the MBI5124 chips U2 The cathode of pipe D2 is connected, and the 18th pin of the MBI5124 chips U2 is connected with the cathode of light emitting diode D3, and described luminous two The anode of the anode of pole pipe D1, the anode of light emitting diode D2 and light emitting diode D3 draws respectively with the 7th, the 8 of 4953 chip U3 The points of common connection of foot is connected, the 4953 chip U3 the 1st, 3 pins and power supply V_CCIt is connected, the 2nd of the 4953 chip U3 the Pin is connected with the 18th pin of 74HC245 chips U1, and the of the 4th pin of the 4953 chip U3 and 74HC245 chips U1 17 pins are connected.It needs to illustrate, MBI5124 chips are only institute in the present embodiment used by the constant-current circuit A kind of embodiment being related to can carry out being changed to other models in external factor such as consideration production cost client actual needs Signal chip, as long as ensureing LED module normal work.

In the present embodiment, the anti-surge circuit includes resistance R2, resistance R3, resistance R4, capacitance C1, capacitance C2 and capacitance C3；The 16th pin of the 74HC245 chips U1 is connected by resistance R2 with the 3rd pin of MBI5124 chips U2, described The 15th pin of 74HC245 chips U1 is connected by resistance R3 with the 4th pin of MBI5124 chips U2, the 74HC245 chips The 14th pin of U1 is connected by resistance R4 with the 21st pin of MBI5124 chips U2, one end and the resistance R2 of the capacitance C1 It is connected with the points of common connection of the 3rd pin of MBI5124 chips U2, the other end ground connection of the capacitance C1, the capacitance C2's One end is connected with the points of common connection of the 4th pin of resistance R3 and MBI5124 chip U2, the other end ground connection of the capacitance C2, One end of capacitance C3 is connected with the points of common connection of the 21st pin of resistance R4 and MBI5124 chip U2, and the capacitance C3's is another One end is grounded.

It is sealed in signal path after the resistance R4 of the resistance R2 of 10 Ω, the resistance R3 of 10 Ω, 10 Ω or adds RC integration electricity Road can reduce greatly phenomena such as overshoot of signal is with ground bullet.Such method is particularly suitable for CLK clocks and ALT latch signals, even if objective Family wiring is less perfect, and the chip less high-performance of cooperation is also the same to inhibit interference, the display effect got well.

In the present embodiment, the PCB circuit board includes the 3rd pin of interface IN, the interface IN and 74HC245 chips U1 The 6th pin be connected, the 9th pin of the interface IN is connected with the 2nd pin of 74HC245 chips U1, the of the interface IN 10 pins are connected with the 3rd pin of 74HC245 chips U1, and the 13rd pin of the interface IN draws with the 4th of 74HC245 chips U1 Foot is connected, and the 15th pin of the interface IN is connected with the 5th pin of 74HC245 chips U1.

In the present embodiment, the sheet metal is copper sheet, and the copper sheet extends well since it has in practical applications Performance it is enough by its it is more convenient be attached on the pad of lamp bead with agreeing with, the corrosion resistance of copper sheet is good in addition, largely extends The service life of LED module.

Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model rather than it is limited System；Although the utility model is described in detail with reference to foregoing embodiments, those of ordinary skill in the art should Understand：It can still modify to the technical solution recorded in foregoing embodiments either to which part or whole Technical characteristic carries out equivalent replacement；And these modifications or replacement, this practicality that it does not separate the essence of the corresponding technical solution are new The range of each embodiment technical solution of type, should all cover in the claim of the utility model and the range of specification.

Claims

1. a kind of reliable LED module, including PCB circuit board and lamp bead, the lamp bead is packaged in PCB circuit board by pad On；It is characterized in that：The pad is provided with sheet metal, and signal seat and the power socket of the PCB circuit board, which add, is printed on one layer of resistance Solder paste ink；The PCB circuit board includes preventing dead circuit for lamp, anti-surge circuit, signal transmitting and receiving circuit and constant-current circuit, described anti-dead Circuit for lamp is electrically connected with the signal transmitting and receiving circuit, and the signal transmitting and receiving circuit is connected by anti-surge circuit and the constant-current circuit It connects.

2. a kind of reliable LED module according to claim 1, it is characterised in that：The signal transmitting and receiving circuit includes 74HC245 chips U1, the anti-dead circuit for lamp include resistance R1；One end of the resistance R1 and power supply V_CCIt is connected, the resistance The other end of R1 is connected with the 6th pin of 74HC245 chips U1, the 1st pin and power supply V of the 74HC245 chips U1_CCPhase Even, the 19th pin ground connection of the 74HC245 chips U1.

3. a kind of reliable LED module according to claim 2, it is characterised in that：The constant-current circuit includes MBI5124 Chip U2, the 16th pin of the 74HC245 chips U1 are connected with the 3rd pin of MBI5124 chips U2, the 74HC245 cores The 15th pin of piece U1 is connected with the 4th pin of MBI5124 chips U2, the 14th pin of the 74HC245 chips U1 with The 21st pin of MBI5124 chips U2 is connected, the 1st pin ground connection of the MBI5124 chips U2, the MBI5124 chips U2 The 23rd pin by being grounded after resistance R5, the cathode phase of the 20th pin and light emitting diode D1 of the MBI5124 chips U2 Even, the 19th pin of the MBI5124 chips U2 is connected with the cathode of light emitting diode D2, and the of the MBI5124 chips U2 18 pins are connected with the cathode of light emitting diode D3, the anode of the light emitting diode D1, the anode and hair of light emitting diode D2 The anode of optical diode D3 is connected respectively with the 7th of 4953 chip U3 the, points of common connection of 8 pins, the 4953 chip U3's 1st, 3 pins and power supply V_CCIt is connected, the 2nd pin of the 4953 chip U3 is connected with the 18th pin of 74HC245 chips U1, institute The 4th pin for stating 4953 chip U3 is connected with the 17th pin of 74HC245 chips U1.

4. a kind of reliable LED module according to claim 3, it is characterised in that：The anti-surge circuit includes resistance R2, resistance R3, resistance R4, capacitance C1, capacitance C2 and capacitance C3；The 16th pin of the 74HC245 chips U1 passes through resistance R2 It is connected with the 3rd pin of MBI5124 chips U2, the 15th pin of the 74HC245 chips U1 passes through resistance R3 and MBI5124 cores The 4th pin of piece U2 is connected, and the 14th pin of the 74HC245 chips U1 passes through the 21st of resistance R4 and MBI5124 chips U2 Pin is connected, and one end of the capacitance C1 is connected with the points of common connection of the 3rd pin of resistance R2 and MBI5124 chip U2, institute State the other end ground connection of capacitance C1, one end of the capacitance C2 and the public company of the 4th pin of resistance R3 and MBI5124 chip U2 Contact is connected, the other end ground connection of the capacitance C2, one end of capacitance C3 and the 21st pin of resistance R4 and MBI5124 chip U2 Points of common connection be connected, the other end of capacitance C3 ground connection.

5. a kind of reliable LED module according to claim 4, it is characterised in that：The PCB circuit board includes interface IN, the 3rd pin of the interface IN are connected with the 6th pin of 74HC245 chips U1, the 9th pin of the interface IN with The 2nd pin of 74HC245 chips U1 is connected, and the 10th pin of the interface IN is connected with the 3rd pin of 74HC245 chips U1, The 13rd pin of the interface IN is connected with the 4th pin of 74HC245 chips U1, the 15th pin of the interface IN with The 5th pin of 74HC245 chips U1 is connected.

6. a kind of reliable LED module according to claim 1, it is characterised in that：The sheet metal is copper sheet.