CN101398157A - Lamp panel structure process of LED lamp - Google Patents

Abstract

A lamp panel structure process of an LED lamp comprises the following steps: dividing more than one large area on a lamp panel, and respectively arranging a power supply bus and a control bus in each area; dividing each area into more than one area, and arranging unit circuits in the areas; connecting the positive power VCC, negative power GND and controlled end of the unit circuit with the power bus and control bus, leading the power bus and control bus of each area to the end part, and connecting the lamp panel with a lamp bracket. The mechanical connection and the electrical connection of the lamp panel process are reliable, and the high-heat-dissipation base lamp panel structure is very favorable for heat dissipation. The current of the unified constant current element is accurately calculated through a formula, so that the current of each unit circuit can be ensured to be consistent, and the illumination uniformity and the accuracy of the lamp panel can meet the high standard requirements of the fields of aviation and the like.

Description

Light panel structure process of a kind of LED lamp

Technical Field The present invention relates to a design method of lighting fixtures, in particular to a lamp panel structure process of LED lighting fixtures; especially to a lamp panel structure process method on which a plurality of unit circuits are arranged in an orderly manner.

BACKGROUND OF THE INVENTION In the prior art, there are various kinds of LED lamps, and the structure of the lamp boards thereof is also very different.

For example, the Chinese utility model patent ZL200620056938.6 discloses a technical solution called "LED lighting lamps". Figures 1 and 3 of the accompanying drawings of the patent are its structural diagram and electrical schematic diagram. It can be seen from its Figure 1 , the light board is an ordinary epoxy resin PCB board, which is not conducive to heat dissipation.

It can be seen from Figure 3 that the LED lamps are first connected in series to form a series lamp group, and then multiple series lamp groups are connected in parallel, and then connected to both ends of the power supply. It can be known from the basic principles of electrical engineering that in a series circuit, the current flowing through each component is the same, but the threshold voltage for lighting up in different series circuits of LED lamps is also slightly different, but this slight difference will The current that causes it to flow is different. The reason is: there must be a minimum lighting threshold voltage of many series-connected lamp groups, and this minimum threshold voltage acts as a voltage regulator, so that the voltage obtained by other series-connected lamp groups connected in parallel at both ends cannot meet their own requirements. , so the current of other series lamp groups is different from the current of this series lamp group.

Moreover, the appearance and lamp holder of this patent also inherit the shape of the traditional fluorescent lamp. The contacts of the lamp tube and the circuit board are connected by ordinary wires. This kind of connection does not meet the high standard requirements of aviation and other fields.

The technical solution of this patent encapsulates all components in a sealed glass lamp tube, which is not conducive to heat dissipation. The disadvantage is that electronic components are prone to aging at high temperatures.

Summary of the invention The technical problem to be solved by the present invention is to propose a lamp panel process structure for LED lamps by avoiding the shortcomings of the above-mentioned prior art. The key point of the lamp panel process structure in the present invention is to repeatedly place the unit circuit Arranged in an orderly and even manner.

The present invention realizes by adopting following technical scheme:

Implement a lamp panel process of an LED lamp, the process comprises the steps of:

①. Divide more than one large area on the light board, and set a power bus and a control bus on each large area;

②. Divide more than one sub-district in the large area, and arrange unit circuits in the sub-district;

③. Connect the positive power supply VCC, the negative power supply GND and the controlled terminal of the unit circuit to the power bus and the control bus respectively;

④. Lead the power bus and control bus on each large area to the end of each large area, and connect the light board to a light frame here. When connecting, connect the light frame power contact connecting piece Weld the terminal of the control contact with the pad of the power bus, and weld the terminal of the control contact piece with the pad of the control bus.

In the above process, arranging the unit circuit in step ② includes evenly arranging and welding a plurality of LED lamps in the unit circuit in the small area.

In the above-mentioned process, step ② described layout unit circuit (10), the constant current integrated circuit (12) in the unit circuit (10) selects LM317 for use, the first current-limiting resistor (14), the second current-limiting resistor (15) phase Connected in series, the total resistance is R.

When LM317 is used as a constant current source, the output current Io=(V _REF /R)+I _ADJ , where V _REF is the reference voltage, which is 1.25V, and I _ADJ is the current flowing from the adjustment terminal, usually I _ADJ ≤50μA, Can be ignored. It can be seen that the constant current effect of LM317 is better.

Since the minimum dropout voltage of LM317 is 3V, it can work normally when the input voltage VI reaches 4.25V.

According to the above process, a lamp panel structure of an LED lamp is determined, and the lamp panel structure includes:

A light board, on which a power bus and a control bus are distributed.

At least one unit circuit is distributed on the lamp panel by area, and the positive power supply VCC, the negative power supply GND and the controlled terminal of the unit circuit are respectively connected to the power bus and the control bus.

The lamp board is connected with at least one lamp holder, and the lamp holder includes a lamp holder base body, a power contact and a control contact. The contacts are connected with the power bus and the control bus through the connecting piece.

The unit circuit includes: a constant current integrated circuit, a first current limiting resistor, a second current limiting resistor, a plurality of LED lamps and a second current limiting resistor switch; the plurality of LED lamps are evenly distributed in the area of the unit circuit;

The first current limiting resistor, the second current limiting resistor, the constant current integrated circuit, and the second current limiting resistor switch are distributed in spaces between the LED lamps.

The lamp board is based on a high heat dissipation plate, an insulating layer is arranged on the high heat dissipation plate, a power bus and a control bus, and a constant current integrated circuit are arranged on the insulating layer, the first current limiting resistor, the second current limiting resistor, multiple Only the LED light and the second current limiting resistor switch.

There is also a wire connecting the constant current integrated circuit, the first current limiting resistor, the second current limiting resistor, multiple LED lamps and the second current limiting resistor switch on the insulating layer.

Compared with the prior art, the lamp board structure process of the present invention securely and reliably connects the circuit board to the lamp holder mechanically and electrically, meeting the high standard requirements in aviation and other fields. The light board structure of the high heat dissipation base plate of the present invention is very beneficial to heat dissipation. The unit circuit of the present invention adopts a unified constant current element, and the current in the unit circuit is accurately calculated by the formula, and the selected first current-limiting resistor and the second current-limiting resistor are also selected with precise resistance values, so the series lamp group The constant current in the circuit is also very accurate, which can be accurate to 1% of the constant current, and the current of each unit circuit can be guaranteed to be accurate and consistent. Therefore, the illumination uniformity and accuracy of the lamp panel of the present invention meet the high standard requirements in aviation and other fields.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a 1/2 overall schematic diagram of the best embodiment of the lamp panel structure process of the LED lamp of the present invention.

Fig. 2 is the electrical schematic diagram of the lamp panel structure process unit circuit of the LED lamp of the present invention;

Fig. 3 is a schematic diagram of the connection between the lamp panel and the lamp holder of the lamp panel structure process of the LED lamp of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described in detail below in conjunction with the embodiments shown in the accompanying drawings.

Referring to Figures 1 to 3, a lamp panel process for LED lamps is implemented, and the process includes steps:

①. Divide more than one large area on the light board 1, and set a power bus and a control bus on each large area;

②. Divide sub-districts in the large area, and arrange unit circuits 10 in the sub-districts;

③. Connect the positive power supply VCC, the negative power supply GND and the controlled terminal of the unit circuit 10 to the power bus and the control bus respectively;

④. Lead the power bus and the control bus on each large area to the end of each large area, and connect the light board 1 with a light frame 100 here. When connecting, touch the power supply of the light frame 100 Weld the terminal of the head connection piece with the power bus pad, and weld the end of the control contact connection piece with the control bus pad.

In step ②, arranging the unit circuit 10 includes arranging and welding a plurality of LED lamps 11 in the unit circuit 10 evenly in the small area.

In step ②, the unit circuit 10 is arranged. The constant current integrated circuit 12 in the unit circuit 10 is LM317, the first current limiting resistor 14 and the second current limiting resistor 15 are connected in series, and the total resistance is R.

When LM317 is used as a constant current source, the output current Io=(V _REF /R)+I _ADJ , where V _REF is the reference voltage, which is 1.25V, and I _ADJ is the current flowing from the adjustment terminal, usually I _ADJ ≤50μA, Can be ignored. It can be seen that the constant current effect of LM317 is better.

Since the minimum dropout voltage of LM317 is 3V, it can work normally when the input voltage VI reaches 4.25V.

As long as the LM317 is selected and the precision resistor is selected, the constant current can be accurately determined.

It can be seen that the magnitude of the constant current and the accuracy of the constant current depend on the total resistance R after the first current limiting resistor 14 and the second current limiting resistor 15 are connected in series.

As shown in FIG. 2 , as long as the second current limiting resistor 15 is connected to the series loop or short-circuited, the magnitude of the constant current can be changed. What completes this function is the second current-limiting resistor switch Q2, which is connected across the two ends of the second current-limiting resistor 15. The best device is to select a field-effect transistor for use. Of course, this task can also be accomplished with a relay contact.

The gates of the field effect transistors Q2 of the plurality of unit circuits 10 are connected together through a resistor R3, and then connected to the control bus.

Design and manufacture a lamp panel structure of an LED lamp according to the above process, as shown in Figures 1 to 3, the lamp panel structure includes:

A lamp board 1, on which a power bus and a control bus are distributed;

At least one unit circuit 10 is distributed on the lamp panel 1 by area, and the positive power supply VCC, the negative power supply GND and the controlled terminal of the unit circuit 10 are respectively connected to the power bus and the control bus.

The lamp board 1 is connected with at least one lamp holder 100, the lamp holder 100 includes a lamp holder base, power contacts 110, 130 and control contacts 120, the lamp holder base of the lamp holder 100 is connected with the lamp board 1 Fixed, the power contacts 110, 130 and the control contacts 120 are connected to the power bus and the control bus through the connecting piece.

The unit circuit 10 includes: a constant current integrated circuit 12, a first current limiting resistor 14, a second current limiting resistor 15, a plurality of LED lamps 11 and a second current limiting resistor switch 13; the plurality of LED lamps 11 are uniform distributed over the area of the unit circuit 10 .

The first current limiting resistor 14 , the second current limiting resistor 15 , the constant current integrated circuit 12 , and the second current limiting resistor switch 13 are distributed in the spaces between the LED lamps 11 .

The lamp panel 1 is based on a high heat dissipation plate, an insulating layer is arranged on the high heat dissipation plate, a power bus and a control bus, a constant current integrated circuit 12, a first current limiting resistor 14, and a second current limiting resistor are arranged on the insulating layer. Resistor 15, multiple LED lamps 11 and second current limiting resistor switch 13.

There are wires connecting the constant current integrated circuit 12 , the first current limiting resistor 14 , the second current limiting resistor 15 , multiple LED lamps 11 and the second current limiting resistor switch 13 on the insulating layer.

The lamp board 1 is provided with cooling holes 2 .

A preferred embodiment of the present invention is to set two lamp holders at both ends of a strip-shaped lamp board, and the two lamp holders respectively supply power to and control each unit circuit 10 in the lamp board in 1/2 area. The advantage of this structure is that it is symmetrical and easy to assemble and disassemble.

In the preferred embodiment shown in Figure 3, the lamp holder 100 has three contacts 110, and these three contacts 110 are pressed into the three contact grooves 31 of the lamp holder 30. The lamp holder 30 has a self-locking function, which can ensure The contact 110 will not fall off due to vibration.

The lamp board structure of the present invention securely and reliably connects the circuit board to the lamp holder mechanically and electrically, and meets the high standard requirements in aviation and other fields. The high heat dissipation base lamp plate structure of the present invention is very beneficial to heat dissipation. The unit circuit of the present invention adopts a unified constant current element, and the current in the unit circuit is accurately calculated through a formula, so the current of each unit circuit can be guaranteed to be consistent. Therefore, the illumination uniformity and accuracy of the lamp panel of the present invention meet the high standard requirements in aviation and other fields.

The illustrated embodiments of the present invention are not self-limiting, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the present invention within the scope of the technical program.

Claims (10)

1. A lamp panel process for LED lamps, characterized in that the process comprises steps: ①. Divide more than one large area on the light board (1), and set a power bus and a control bus on each large area; 2. Divide more than one sub-district in the large area again, and arrange unit circuits (10) in the sub-district; 3. Connect the positive power supply VCC, the negative power supply GND and the controlled end of the unit circuit (10) to the power bus and the control bus respectively; ④. Lead the power bus and control bus on each large area to the end of each large area, and connect the lamp board (1) with a lamp holder (100) here. When connecting, the lamp Weld the end of the power supply contact connecting piece of the frame (100) with the power bus pad, and weld the end of the control contact connecting piece with the control bus welding pad. 2. The lamp panel process of LED lamps according to claim 1, characterized in that: The arrangement of the unit circuit (10) in step ② includes arranging and welding a plurality of LED lamps (11) in the unit circuit (10) evenly in the small area. 3. The lamp panel process of LED lamps according to claim 1, characterized in that: Step 2. arrange the unit circuit (10), the constant current integrated circuit (12) in the unit circuit (10) selects LM317, the first current limiting resistor (14), the second current limiting resistor (15) are connected in series, the total Resistance R satisfies Io=(V _REF /R)+I _ADJ . 4. A lamp panel structure of an LED lamp, characterized in that the lamp panel structure comprises: A lamp board (1), on which a power bus and a control bus are distributed; At least one unit circuit (10) is distributed on the lamp panel (1) by area, and the positive power supply VCC, the negative power supply GND and the controlled terminal of the unit circuit (10) are respectively connected to the power bus and the control bus. 5. The lamp panel structure of LED lamps according to claim 4, characterized in that: The lamp board (1) is connected with at least one lamp holder (100), and the lamp holder (100) includes a lamp holder base, power contacts and control contacts, and the lamp holder base of the lamp holder (100) is connected with The lamp board (1) is connected and fixed, and the power contact and the control contact are connected to the power bus and the control bus through the connecting piece. 6. The lamp panel structure of LED lamps according to claim 4, characterized in that: The unit circuit (10) includes: a constant current integrated circuit (12), a first current limiting resistor (14), a second current limiting resistor (15), a plurality of LED lamps (11) and a second current limiting resistor switch (13); the plurality of LED lamps (11) are evenly distributed in the area of the unit circuit (10); The first current limiting resistor (14), the second current limiting resistor (15), the constant current integrated circuit (12), and the second current limiting resistor switch (13) are distributed in the spaces between the LED lamps (11). 7. The lamp panel structure of LED lamps according to claim 4, characterized in that: The lamp board (1) is based on a high heat dissipation plate, an insulating layer is arranged on the high heat dissipation plate, a power bus and a control bus, a constant current integrated circuit (12), and a first current limiting resistor (14) are arranged on the insulating layer. ), a second current limiting resistor (15), a plurality of LED lamps (11) and a second current limiting resistor switch (13). 8. The lamp panel structure of LED lamps according to claim 4, characterized in that: There are also a constant current integrated circuit (12), a first current limiting resistor (14), a second current limiting resistor (15), a plurality of LED lamps (11) and a second current limiting resistor switch ( 13) Connected wires. 9. The lamp panel structure of LED lamps according to claim 4, characterized in that: The lamp board (1) is provided with cooling holes (2). 10. The lamp panel structure of LED lamps according to claim 4 or 6, characterized in that: Both ends of the lamp board (1) are respectively connected to a lamp holder (100), and each lamp holder (100) provides power and controls to 1/2 area of the lamp board (1); the constant current Integrated circuit (12) adopts LM317.

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