JP2021086685A - Circuit board for mounting led and belt-like flexible led light - Google Patents

Abstract

To provide a thin and narrow width circuit board for mounting LED, and a belt-like flexible LED light using the same.SOLUTION: A circuit board 10 for mounting LED includes a base board 20 having insulation property and flexibility, and a wiring pattern 30 formed on the base board 20. The wiring pattern 30 includes a first power supply part 31 and a second power supply part 32 formed at both sides in a width direction W of the base board 20, for supplying current to an LED 50 and a part mounting part 33 located between the first power supply part 31 and the second power supply part 32, for mounting the LED 50, which are formed on one side of the base board 20. The first power supply part 31 and the second power supply part 32 can be formed in narrow width and thin thickness when forming an LED lighting unit by being folded back to the reverse side of the part mounting part 33.SELECTED DRAWING: Figure 1

Description

The present invention relates to an LED mounting circuit board formed of a flexible strip-shaped substrate, and a strip-shaped flexible LED light in which an LED is mounted on the LED mounting circuit board and housed in a case.

Band-shaped LED lighting devices may be used for various outdoor and indoor lighting, illuminations, guide lights, and the like. For example, the LED mounting circuit board, the band-shaped flexible LED light, and the LED lighting device using the same as described in Patent Document 1 are LED mounting portions in which a plurality of LEDs are mounted in an array in the central portion in the width direction of the flexible board. Is provided, and a first substrate and a second substrate on which a power supply pattern for passing a current through the LED is formed are provided.
The back surfaces of the first substrate and the second substrate are adhered to each other, and the light emitting unit is formed so as to be integrated into one flexible plate and to have a T-shaped cross section.

Further, a technique described in Patent Document 2 is known as a technique for bending a flexible substrate.
The multi-needle electrode described in Patent Document 2 is provided with a large number of parallel line patterns made of a conductive material on a flexible substrate having an insulating property, and one end face of the parallel lines is used as a needle electrode. The multi-needle electrodes are bent in opposite directions along a direction substantially parallel to each electrode line.

Japanese Unexamined Patent Publication No. 2013-118169 Japanese Unexamined Patent Publication No. 58-199157

In the LED mounting circuit board, the strip-shaped flexible LED light, and the LED lighting device using the same as described in Patent Document 1, the back surfaces of the first substrate and the second substrate are adhered to each other to form a T-shaped cross section. Therefore, the height of the light emitting unit becomes high. If the first substrate and the second substrate are left as they are without being bent from the LED mounting portion, they can be formed much thinner than the T-shape, but the width becomes wider than the T-shape. It ends up.

The flexible substrate can be formed into a narrow width by configuring the flexible substrate with a multilayer substrate and wiring the wiring pattern of the LED mounting portion so that the wiring patterns of the first substrate and the second substrate are in a vertical relationship. However, doing so would significantly increase the cost of the flexible substrate.

In the multi-needle electrode described in Patent Document 2, since the substrate is bent in opposite directions along the direction substantially parallel to each electrode line, this substrate is applied to a wiring board for mounting an LED on one side. If you try, one of the bendable substrates will cover the LED.

Therefore, an object of the present invention is to provide a circuit board for mounting an LED, which is thin in thickness and thin in the width direction, and a band-shaped flexible LED light using the same.

The circuit board for mounting LEDs of the present invention includes a strip-shaped base substrate having insulation and flexibility, and a wiring pattern formed on the base substrate, and the wiring pattern is provided on both sides of the base substrate in the width direction. A pair of power supply units formed at the ends for supplying current to the LEDs and a component mounting unit located between the pair of power supply units and on which the LEDs are mounted are one surface of the base substrate. The pair of power supply units are folded back to the back surface side of the component mounting unit.

In the LED mounting circuit board of the present invention, in the wiring pattern, a pair of power supply parts for supplying a current to the LED and a component mounting part on which the LED is mounted are formed on one surface of the base board. There is. Then, a pair of power supply units formed at both end portions in the width direction of the base substrate are folded back to the back surface side of the component mounting portion located between the pair of power supply units. Therefore, the wiring pattern of the component mounting portion and the wiring pattern of the pair of power supply portions can be three-dimensionally wired while the LED is facing the front surface.

The total width of the pair of power supply units can be shorter than the width of the component mounting unit. Even if the pair of power supply units is folded back to the back surface side of the component mounting unit, the total width of the pair of power supply units is shorter than the width of the component mounting unit, so that the pair of power supply units do not overlap each other. Therefore, it is possible to prevent the pair of power supply units from overlapping each other and causing a short circuit.

The pair of power supply units may be formed with a connection portion to which the pair of power supply lines are connected. Even if a pair of power supply lines are connected to the pair of power supply units, the total width of the pair of power supply units is shorter than the width of the component mounting portion, so that it is possible to prevent the pair of power supply lines from being short-circuited.

It is possible that a non-wiring region is formed between the pair of power supply units and the component mounting unit. Since the wiring pattern is not formed in the non-wiring region, the thin base substrate is bent by making the non-wiring region a crease, so that the pair of power supply units can be easily folded back.

The strip-shaped flexible LED light of the present invention is characterized by including a tubular case into which the circuit board for mounting the LED of the present invention is inserted.

Since the circuit board for mounting the LED of the present invention can be formed thin and narrow, a strip-shaped flexible LED light having a thin case can be obtained.

In the case, a groove along the length direction of the LED mounting circuit board may be formed on the back surface side of the LED mounting circuit board on which the LED is mounted. Even when the LED mounting circuit board of the present invention is inserted into the case and the filler is filled in the case, since a groove is formed on the back surface side of the LED mounting circuit board in the case, the filler is filled with this groove. It can be transmitted to the back of the case.

In the present invention, the wiring pattern of the component mounting portion and the wiring pattern of the pair of power supply portions can be three-dimensionally wired while the LED is facing the front surface, so that even a single-layer board can be wired. Therefore, the LED mounting circuit board and the strip-shaped flexible LED light, which are thin in thickness and thin in the width direction, can be obtained.

It is a figure which shows the circuit board for LED mounting which concerns on embodiment of this invention. It is a figure which shows the equivalent circuit of the circuit board for LED mounting shown in FIG. It is a partially enlarged view of the circuit board for LED mounting shown in FIG. It is a figure which shows the band-shaped flexible LED light which concerns on embodiment of this invention. It is a figure for demonstrating the manufacturing method of the circuit board for LED mounting shown in FIG.

An LED mounting circuit board according to an embodiment of the present invention and a band-shaped flexible LED light using the same will be described with reference to the drawings. First, the LED mounting circuit board will be described with reference to FIG.

(Configuration of circuit board for LED mounting)
The LED mounting circuit board is a flexible board on which LEDs are mounted to form a band-shaped LED light. The LED mounting circuit board 10 shown in FIG. 1 represents one unit. One unit of LED mounting circuit board 10 is cut with "CUT" at both ends so that a desired length can be cut out from a continuous long LED mounting circuit board 10. A display indicating the position is printed. Further, "+" to which the anode of the LED is connected and "-" to which the cathode is connected are displayed.

The LED mounting circuit board 10 covers the base substrate 20 having insulation and flexibility, the wiring pattern 30 formed on one surface of the base substrate 20, and the wiring pattern 30, and the terminal portion of the wiring pattern 30. It is provided with an insulating film 40 exposed to the above. The LED mounting circuit board 10 according to this embodiment is formed of a single-layer board composed of a base board 20 and a wiring pattern 30.

The base substrate 20 is formed in a long strip shape. The base substrate 20 is formed of, for example, a resin film such as polyimide.

The wiring pattern 30 is formed of a metal foil. The wiring pattern 30 is a first power supply unit 31 and a second power supply unit 32 formed on both side ends of the base substrate 20 in the width direction W, and is a first power supply for supplying a current to the LEDs 50 (51 to 57). A unit 31 and a second power supply unit 32 (a pair of power supply units) and a component mounting unit 33 located between them are formed on one surface (front surface) of the base board 20.

For the first power supply unit 31 and the second power supply unit 32, for example, the first power supply unit 31 can be a positive power supply pattern, and the second power supply unit 32 can be a ground pattern.
In order to connect the power supply lines L1 and L2 (see FIG. 4) by soldering to the first power supply unit 31 and the second power supply unit 32 by soldering, the insulating film 40 to the first power supply unit 31 and the second power supply unit 32 are connected to each other. Connection portions 31a and 32a with the power supply portion 32 exposed are formed. The connecting portions 31a and 32a are formed at three locations, both ends and a central portion of the first power supply unit 31 and the second power supply unit 32 in the length direction L.

The component mounting portion 33 is formed of the first to eleventh component mounting portions 33a to 33k.
The first LED terminal 33a is formed so as to be connected to the first power supply unit 31 in order to conductively connect one terminal of the LED 51 to the first power supply unit 31, and is exposed from the insulating film 40. 331 is formed.
The second component mounting portion 33b and the second LED terminal 332 exposed from the insulating film 40, like the first component mounting portion 33a, in order to electrically connect the other terminal of the LED 51 and one terminal of the LED 52. A first LED terminal 331 is formed.

The third component mounting portion 33c is formed with a second LED terminal 332 and a first resistor terminal 611 in order to electrically connect the other terminal of the LED 52 and one terminal of the resistor 61.
In the fourth component mounting portion 33d, a second resistor terminal 612 and a first LED terminal 331 are formed in order to electrically connect the other terminal of the resistor 61 and one terminal of the LED 53.
In the fifth component mounting portion 33e, a second LED terminal 332 and a first diode terminal 621 are formed in order to electrically connect the other terminal of the LED 53 and one terminal of the diode 62 for preventing backflow. ..

In the sixth component mounting portion 33f, a second diode terminal 622 and a first LED terminal 331 are formed in order to conductively connect the other terminal of the diode 62 and one terminal of the LED 54.
The seventh component mounting portion 33g is formed with a second LED terminal 332 and a first resistor terminal 611 in order to electrically connect the other terminal of the LED 54 and one terminal of the resistor 63.
In the eighth component mounting portion 33h, a second resistor terminal 612 and a first LED terminal 331 are formed in order to conductively connect the other terminal of the resistor 63 and one terminal of the LED 55.

The ninth component mounting unit 33i has a tenth component mounting unit 33j in which a first LED terminal 331 and a second LED terminal 332 are formed in order to electrically connect the other terminal of the LED 55 and one terminal of the LED 56. Is formed with a second LED terminal 332 and a first LED terminal 331 in order to electrically connect the other terminal of the LED 56 and the one terminal of the LED 57.
The eleventh component mounting unit 33k is formed so as to be connected to the second power supply unit 32 in order to electrically connect the other terminal of the LED 57 to the second power supply unit 32, and the second LED terminal 332 is formed.

The second component mounting section 33b, the ninth component mounting section 33i, and the tenth component mounting section 33j that connect the LEDs 50 to each other are wired from one side P1 to the other P2 centering on the center in the width direction W. The third component mounting portion 33c to the eighth component mounting portion 33h that connects the LED 50, the resistors 61, 63, and the diode 62 are wired only to one side P1 or only the other side P2. By forming the wiring pattern 30 in this way, the LED 50 can be mounted in the same direction along the width direction W.

Further, since the wiring pattern 30 is formed in this way, as shown in FIG. 2, the LEDs 51 to 57, the resistor 61, the diode 62, and the resistor 63 are connected to the first power supply unit 31 and the second power supply unit 32. It is connected in series by the first to eleventh component mounting portions 33a to 33k.

In the LED mounting circuit board 10, the first power supply unit 31 and the second power supply unit 32 are bent from the first to eleventh component mounting units 33a to 33k to the other surface (back surface) side of the base substrate 20 and adhered to each other. Will be done.
The bending position is between the component mounting unit 33 and the first power supply unit 31 and between the component mounting unit 33 and the second power supply unit 32. The bending position is the second component mounting unit 33b to the tenth component. The non-formed regions S1 and S2 (see FIG. 3) of the wiring pattern 30 between the mounting unit 33j and the first power supply unit 31 and the second power supply unit 32. The non-formed regions S1 and S2 are formed linearly along the length direction L.

As shown in FIG. 3, the total width W1 of the first power supply unit 31 and the width W2 of the second power supply unit 32 are formed shorter than the width W3 of the component mounting unit 33.
In the present embodiment, the width W1 of the first power supply unit 31 and the width W2 of the second power supply unit 32 are formed by the same width, and the respective widths W1 and W2 are formed to be about 2 mm. Further, the width W3 of the component mounting portion 33 is formed to be about 5 mm.

The insulating film 40 includes connection portions 31a and 32a, a terminal for the first LED 331, a terminal for the second LED 332, a terminal for the first resistor 611 and a terminal for the second resistor 612, a terminal for the first diode 621 and a terminal for the second diode 622. It is formed in a region other than.

(Structure of strip-shaped flexible LED light)
Next, the configuration of the band-shaped flexible LED light using the LED mounting circuit board 10 will be described with reference to FIG.
In the strip-shaped flexible LED light 100 shown in FIG. 4, the LED 50, resistors 61, 63 and the LED 50, resistors 61, 63 and the LED 50, the resistors 61, 63 and the LED 50, the resistors 61, 63 and the LED 50, the resistors 61, 63 A light emitting unit U in which a diode 62 (see FIG. 1) is mounted and power lines L1 and L2 are connected to the folded first power supply unit 31 and the second power supply unit 32 is inserted in the case 70.

The case 70 is a hollow tube formed in a long shape and having a space for accommodating the light emitting unit U inside. The case 70 is made of flexible soft plastic or silicone rubber.
In the case 70, the component mounting side of the light emitting unit U is formed as a transparent light emitting portion 71. The back surface side of the light emitting unit U opposite to the light emitting side of the case 70 is formed as a gray installation portion 72. The light emitting portion 71 and the installation portion 72 are integrally molded.

In the installation portion 72 of the case 70, a pair of base portions 72a having a groove formed in the crown portion is the length of the case 70 in order to receive the power supply lines L1 and L2 wired along the length direction of the light emitting unit U. It is formed along the vertical direction.
A groove 72b is formed along the length direction of the case 70 at the bottom of the installation portion 72 sandwiched between the base portions 72a.

(Manufacturing method of circuit board for LED mounting and strip-shaped flexible LED light)
An LED mounting circuit board according to an embodiment of the present invention configured as described above and a method for manufacturing a band-shaped flexible LED light using the same will be described with reference to the drawings.
The LED mounting circuit board 10 is manufactured from a long strip-shaped original board 10p in which the LED mounting circuit board 10 as shown in FIG. 5 is connected in the width direction W. In the original substrate 10p shown in FIG. 5, four LED mounting circuit boards 10 are connected in the width direction W. At both end portions 11 of the original substrate 10p in the width direction W, holes 11p in which the transport sprockets mesh with each other are formed along the length direction L.

In this original substrate 10p, the metal foil formed on the entire surface side of the base substrate 20 is removed by etching or the like to form a wiring pattern 30, and the first LED terminal 331 and the second LED terminal 332 are formed. , The insulating film 40 covers the regions other than the regions of the first resistor terminal 611 and the second resistor terminal 612, the first diode terminal 621, and the second diode terminal 622.

Next, depending on the component mounting machine, the LED 50 is connected to the first LED terminal 331 and the second LED terminal 332, the resistors 61, 63 are connected to the first resistance terminal 611 and the second resistance terminal 612, the first diode terminal 621 and the first diode terminal 621 are used. 2 The diode 62 is mounted on the diode terminal 622 and soldered by a reflow furnace.
Then, by cutting the position of the cutting line C, the individual LED mounting circuit board 10 (see FIG. 1) on which the components are mounted is obtained.

Next, among the LED mounting circuit boards 10 connected along the length direction L, "CUT" indicating the cutting position displayed at the end of the LED mounting circuit board 10 for the desired length is added. Disconnect. By doing so, it is possible to meet the demands of various lengths.

Next, the power supply line L1 (see FIG. 4) is arranged along the first power supply unit 31 and soldered to the connection unit 31a. Further, the power supply line L2 (see FIG. 4) is arranged along the second power supply unit 32 and soldered to the connection unit 32a.
The power supply lines L1 and L2 may be, for example, a net wire, a flexible copper plate, a single wire, a stranded wire, or the like. By connecting the power supply lines L1 and L2 to the first power supply unit 31 and the second power supply unit 32, a larger current can flow than the first power supply unit 31 and the second power supply unit 32, and the voltage drop can be suppressed. Furthermore, it is possible to make it difficult for the brightness to decrease.

Then, as shown in FIG. 3, the non-wiring areas S1 and S2 of the wiring pattern 30 are used as folded lines, and the first power supply unit 31 and the second power supply unit 32 are folded back to the back surface side of the component mounting unit 33, respectively.
Since the wiring pattern 30 is not formed in the non-wiring areas S1 and S2, the thin base substrate 20 is bent by making the non-wiring areas S1 and S2 creases, so that a pair of power supply units can be easily formed. Can be folded back.

Since the sum of the width W1 of the first power supply unit 31 and the width W2 of the second power supply unit 32 is formed shorter than the width W3 of the component mounting unit 33, the first power supply unit 31 and the second power supply unit 32 are formed. Can be folded back without overlapping. Therefore, it is possible to prevent the first power supply unit 31 and the second power supply unit 32 from being short-circuited.
Further, the power supply line L1 connected to the first power supply unit 31 can be folded back to the second power supply unit 32, and the power supply line L2 connected to the second power supply unit 32 can be folded back without interfering with the first power supply unit 31. Therefore, it is possible to prevent the power supply line L1 from being short-circuited to the second power supply unit 32 and the power supply line L2, and the power supply line L2 from being short-circuited to the first power supply unit 31 and the power supply line L1.

The first power supply unit 31 and the second power supply unit 32 folded back to the component mounting unit 33 can be attached to the back surface of the component mounting unit 33 with double-sided tape or an adhesive. In this way, the light emitting unit U (see FIG. 4) can be manufactured.

Next, as shown in FIG. 4, the light emitting unit U is inserted from the end of the case 70, and the inside is filled with silicone rubber as a filler. When the inside of the case 70 is filled with silicone rubber, a space for arranging the LED 50 and the like is secured on the component mounting portion 33 side of the light emitting unit U (LED mounting circuit board 10), so that the silicone rubber is used as the case. It is possible to advance from the end of 70 toward the back.
However, in the LED mounting circuit board 10 which is thinned by folding back the first power supply unit 31 and the second power supply unit 32 to the component mounting unit 33, the gap between the first power supply unit 31 and the second power supply unit 32 is small.

In the strip-shaped flexible LED light 100 according to the present embodiment, a groove 72b is formed in the installation portion 72 below the light emitting unit U along the length direction L. Therefore, it is possible to secure a space for the silicone rubber to be sufficiently distributed to the back surface side of the light emitting unit U, and it is possible to sufficiently distribute the silicone rubber from the end portion to the back side of the case 70.

As described above, in the LED mounting circuit board 10 according to the present embodiment shown in FIG. 1, the wiring pattern 30 includes a pair of power supply units (first power supply unit 31, second power supply unit 32) on the LED 50. , The component mounting portion 33 on which the LED 50 is mounted is formed on one surface of the base substrate 20. Then, the pair of first and second power supply units 31 and 32 formed on both side ends of the base substrate 20 in the width direction W are located between the pair of first and second power supply units 31 and 32 for mounting components. It is folded back to the back surface side of the portion 33. Therefore, even in the case of a single-layer substrate, the pair of first and second power supply units 31 and 32 and the component mounting unit 33 can be three-dimensionally wired in the thickness direction. Therefore, the thickness can be made thinner than the LED mounting circuit board described in Patent Document 1 which is thin in the width direction W and formed in a T shape.

Further, since the LED mounting circuit board 10 can be formed thin and narrow, the band-shaped flexible LED light 100 can be formed thin and narrow.
In the present embodiment, the LED mounting circuit board 10 is formed of a single-layer board composed of a base board 20 and a wiring pattern 30 formed on one surface of the base board 20, but for example, a component. The mounting unit may be formed by a plurality of layers of wiring patterns, the first power supply unit and the second power supply unit may also be formed by a plurality of layers of wiring patterns, and LEDs that emit a plurality of colors may be mounted on the component mounting unit.

The present invention can be suitably used in various fields such as outdoor and indoor lighting, illuminations, and guide lights.

100 Band-shaped flexible LED light U light emitting unit 10 LED mounting circuit board 10p Original board 11 Both side ends 11p hole 20 Base board 30 Wiring pattern 31 1st power supply part 32 2nd power supply part 31a, 32a Connection part 33 Parts mounting part 33a 1 Part mounting part 33b 2nd part mounting part 33c 3rd part mounting part 33d 4th part mounting part 33e 5th part mounting part 33f 6th part mounting part 33g 7th part mounting part 33h 8th part mounting part 33i 9th part Mounting part 33j 10th part mounting part 33k 11th part mounting part 331 1st LED terminal 332 2nd LED terminal 40 Insulation film L1, L2 Power supply line 50, 51-57 LED
61, 62, 63 Resistance 611 1st resistance terminal 612 2nd resistance terminal 621 1st diode terminal 622 2nd diode terminal 70 Case 71 Light emitting part 72 Installation part 72a Base part 72b Groove C Cutting line L Length Direction W Width direction S1, S2 Non-formed area W1, W2, W3 Width P1 One side P2 The other side

Claims (6)

A strip-shaped base substrate having insulating properties and flexibility, and a wiring pattern formed on the base substrate are provided.
The wiring pattern is formed at both end portions in the width direction of the base substrate, is located between a pair of power supply units for supplying a current to the LED and the pair of power supply units, and the LED is mounted. A component mounting portion is formed on one surface of the base substrate.
The pair of power supply units are LED mounting circuit boards that are folded back to the back surface side of the component mounting unit. The LED mounting circuit board according to claim 1, wherein the total width of the pair of power supply units is shorter than the width of the component mounting unit. The LED mounting circuit board according to claim 2, wherein a connection portion to which the pair of power supply lines is connected is formed in the pair of power supply units. The LED mounting circuit board according to any one of claims 1 to 3, wherein a non-wiring region is formed between the pair of power supply units and the component mounting unit. A strip-shaped flexible LED light provided with a tubular case into which a circuit board for mounting an LED is inserted according to any one of claims 1 to 4. The strip-shaped flexible LED light according to claim 5, wherein in the case, a groove is formed along the length direction of the LED mounting circuit board on the back surface side of the LED mounting circuit board on which the LED is mounted.

Images