JP2020035594A - Light source board and lighting device - Google Patents

Abstract

To provide a light source substrate which can be used for any of two lighting devices having different power consumption.SOLUTION: A light source substrate 1 includes two surfaces, a first surface 11 and a second surface 12, where a plurality of light emitting elements 2 are mounted. On the first surface 11, a first wiring pattern for first lighting device is formed, and on the second surface 12, a second wiring pattern for second lighting device in which the power consumption is different from that of the first lighting device is formed. The first lighting device is the lighting device which uses the light source substrate 1 independently, or it is the lighting device which uses the plurality of pieces of light source substrates 1 by electrically connecting them. The second lighting device may be the lighting device which uses the light source substrates 1 different in the number of pieces from that of the first lighting device. A plurality of lands 112 for light emitting mounting included in the first wiring pattern may be provided at the position substantially back-to-back with a plurality of lands 122 for light emitting mounting included in the second wiring pattern.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a light source substrate mounted with a plurality of light emitting elements and used for a light source unit of a lighting device. Further, the present invention relates to a lighting device provided with a light source mounting board in which a plurality of light emitting elements are mounted on a light source board.

  In recent years, as an alternative to incandescent lamps and fluorescent lamps, lighting devices using light emitting elements such as light emitting diodes (LEDs) as light sources have become widespread. Among such lighting devices, for example, a lighting device having a long shape such as a base light or a straight tube type lighting device uses a light source mounting board in which a plurality of LEDs are mounted on a long board.

  Lighting devices having a long shape such as a base light and a straight tube type lighting device are roughly divided into a 40 W (watt) type lighting device having a length of about 1.2 m, and a lighting device having a length of about 2.4 m. There are 110W type illuminators, 40W type illuminators are used by connecting two light source boards of about 60cm in length, and 110W type illuminators are used by connecting four light source boards of about 60cm in length. It is common to be done. For example, Patent Literature 1 discloses a straight tube lighting device configured to house two LED boards in a connected state in a tube having a light diffusing property. Note that the terms “40W type” and “110W type” are names based on the power consumption of the era when the light source was a fluorescent lamp, and are different from the actual power consumption of a lighting device using an LED as a light source. However, it will be used conventionally such as “40W-type lighting device” and “110W-type lighting device”.

JP-A-2006-139747

  Since the power consumption is different between the 40W-type lighting device and the 110W-type lighting device, a circuit design corresponding to each is required. That is, since the wiring pattern formed on the light source substrate is different between the 40W-type lighting device and the 110W-type lighting device, it is necessary to separately produce two types of light source substrates according to the lighting device, thereby increasing the manufacturing cost. There is.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a light source substrate that can be used for any of two lighting devices having different power consumption. It is another object of the present invention to provide a lighting device using such a light source substrate.

  In order to achieve the above object, the present invention firstly provides a light source substrate having two surfaces, a first surface and a second surface on which a plurality of light emitting elements are mounted. A first wiring pattern for one lighting device is formed, and a second wiring pattern for a second lighting device having power consumption different from that of the first lighting device is formed on the second surface. (Invention 1).

  According to the above invention (Invention 1), the light source substrate has the first surface on which the first wiring pattern for the first lighting device is formed, and the second surface for the second lighting device having different power consumption from the first lighting device. Since it has the second surface on which the two wiring patterns are formed, the same light source substrate can be used for any of the two lighting devices having different power consumption. In addition, when the light emitting element is mounted on the land for mounting the light emitting element included in the wiring pattern on one surface, the land for mounting the light emitting element included in the wiring pattern on the other surface drives the light emitting element. Since it has a function of radiating generated heat, the heat radiation of the light source substrate is improved.

  In the above invention (Invention 1), the first lighting device is a lighting device using the light source substrate alone, or a lighting device using a plurality of the light source substrates electrically connected to each other, It is preferable that the second lighting device is a lighting device that electrically connects and uses a different number of the light source substrates from the first lighting device (Invention 2).

  According to the above invention (Invention 2), by changing the number of light source substrates to be connected, the same light source substrate can be used for any of two lighting devices having different dimensions.

  In the above invention (Invention 2), when the first lighting device is a lighting device that uses the light source substrate alone, a connection for electrically connecting a plurality of the light source substrates only to the first surface. Preferably, a terminal is provided (Invention 3), and when the first lighting device is a lighting device that electrically connects and uses a plurality of the light source substrates, the first surface and the second surface are used. A connection terminal for electrically connecting the light source substrate is provided on each of the two surfaces, and the connection terminal provided on the first surface has a plurality of light emitting elements mounted on the second surface. It is preferable that the connection terminal provided on the second surface is used when a plurality of light emitting elements are mounted on the first surface (Invention 4). In the present invention, the term “connection terminal” refers to, for example, a connection terminal for harness connection for electrically connecting a light source substrate using a wire harness, or an inter-board connector for connecting connectors provided on each light source substrate. This is a concept including all terminals for electrically connecting a plurality of light source substrates, such as connection terminals for connection.

  According to the above inventions (Inventions 3 and 4), when the light source substrates are connected and used, the connection terminal for electrically connecting the two light source substrates is provided on the back surface of the surface on which the light emitting element is mounted. The arrangement prevents the connection terminal from blocking light emitted from the light-emitting element, so that it is possible to suppress occurrence of uneven lighting of a lighting device using the light source substrate.

  In the above inventions (Inventions 1 to 4), the plurality of light emitting element mounting lands included in the first wiring pattern are positioned substantially opposite to the plurality of light emitting element mounting lands included in the second wiring pattern. Preferably, it is provided (Invention 5).

  According to the above invention (Invention 5), when the light emitting element is mounted on the light emitting element mounting land included in the wiring pattern on one surface, the light emitting element mounting land included in the wiring pattern on the other surface is removed. Since it is located almost directly behind the land on which the light emitting element is mounted, the heat generated when the light emitting element is driven is more easily radiated, so that the heat radiation of the light source substrate can be further improved.

  Secondly, the present invention provides a lighting device including a light source mounting board having a plurality of light emitting elements mounted on the first surface or the second surface of the light source substrate according to any one of Inventions 1 to 5. (Invention 6).

  According to the light source substrate of the present invention, the light source substrate can be used for any of two lighting devices having different power consumption. Further, the lighting device of the present invention is provided as a lighting device using a light source substrate which can be used for any of two lighting devices having different power consumptions.

It is explanatory drawing of the light source board which concerns on 1st Embodiment of this invention, (a) is explanatory drawing which shows the structure of a 1st surface, (b) is explanatory drawing which shows the structure of a 2nd surface. It is sectional drawing of the light source board which concerns on the embodiment. It is explanatory drawing which shows the wiring pattern formed in the light source board which concerns on the same embodiment, (a) is explanatory drawing which shows the wiring pattern formed in the 1st surface, (b) is formed in the 2nd surface. FIG. 4 is an explanatory diagram illustrating a wiring pattern that is being used. It is explanatory drawing which shows the use condition of the light source board which concerns on the same embodiment, (a) is explanatory drawing which shows the state which mounted the LED on the 1st surface and connected two light source boards, (b) is 2nd. It is explanatory drawing which shows the state which mounted the LED on the surface and connected four light source boards. FIG. 4 is a cross-sectional view of a state where LEDs are mounted on the light source substrate according to the embodiment and attached to a holder member. It is explanatory drawing of the light source board which concerns on 2nd Embodiment of this invention, (a) is explanatory drawing which shows the structure of a 1st surface, (b) is explanatory drawing which shows the structure of a 2nd surface. It is explanatory drawing which shows the wiring pattern formed in the light source board which concerns on the same embodiment, (a) is explanatory drawing which shows the wiring pattern formed in the 1st surface, (b) is formed in the 2nd surface. FIG. 4 is an explanatory diagram illustrating a wiring pattern that is being used. It is explanatory drawing which shows the use condition of the light source board | substrate which concerns on the same embodiment, (a) is explanatory drawing which shows the state which mounts LED on a 1st surface and uses it independently without connecting, and (b) is 2nd. It is explanatory drawing which shows the state which mounted the LED on the surface and connected two light source boards.

[First Embodiment]
First, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing a light source substrate 1 according to a first embodiment of the present invention, and FIG. 2 is a sectional view of the light source substrate 1 according to the first embodiment. As shown in FIG. 1, the light source substrate 1 has a first surface 11 and a second surface on each of which a plurality of LEDs 2 (light emitting elements) are mounted on both surfaces of a long base material 10 having a length L of about 60 cm. It has twelve two surfaces. As a material of the base material 10, for example, a high thermal conductive resin obtained by adding an inorganic filler such as alumina to a glass epoxy resin is used.

  As shown in FIG. 1A, connection terminals for electrically connecting a plurality of light source substrates 1 to each other when used by connecting the plurality of light source substrates 1 are provided at both ends in the longitudinal direction of the first surface 11 of the light source substrate 1. 111 are provided two each. A plurality of copper lands 112 for mounting the LEDs 2 are arranged at regular intervals on the longitudinal central axis of the first surface 11. As shown in FIG. 2, the surface of the first surface 11 is covered with a resist film 13 made of a white resin such as an epoxy resin, and a wiring pattern connecting the lands 112 is formed under the resist film 13. ing. Here, the wiring pattern formed on the first surface 11 side is a wiring pattern for a 40 W type lighting device, and in this embodiment, as shown in FIG. 3A, 30 LEDs 2 are connected in series. Two lines are formed in parallel, and a total of 60 LEDs 2 are mounted on the first surface 11.

  Similarly, as shown in FIG. 1 (b), a plurality of light source substrates 1 are electrically connected to both ends in the longitudinal direction of the second surface 12 of the light source substrate 1 when the plurality of light source substrates 1 are connected and used. Are provided two each. A plurality of copper lands 122 for mounting the LED 2 are arranged at regular intervals on the longitudinal central axis of the second surface 12. As shown in FIG. 2, the surface of the second surface 12 is covered with a resist film 13, and a wiring pattern connecting the lands 122 is formed below the resist film 13. Here, the wiring pattern formed on the second surface 12 side is a wiring pattern for a 110 W-type lighting device, and in this embodiment, as shown in FIG. 3B, 60 LEDs 2 are connected in series. Only one line is formed, and a total of 60 LEDs 2 are mounted on the second surface 12.

  Since the power consumption is different between the 40W-type illuminating device and the 110W-type illuminating device, the corresponding wiring patterns are formed on the first surface 11 and the second surface 12 of the light source substrate 1. In this embodiment, the LED 2 mounted on the first surface 11 side and the LED 2 mounted on the second surface 12 side use basically the same type, but the first surface 11 side and the second surface 12 Different types of LEDs may be mounted on the side.

  The connection terminal 111 provided on the first surface 11 side and the connection terminal 121 provided on the second surface 12 are both electrically connected when a plurality of light source substrates 1 are connected and used. The connection terminal 111 provided on the first surface 11 side is used when the LED 2 is mounted on the second surface 12 side, and the connection terminal 111 provided on the second surface 12 side. The provided connection terminal 121 is used when the LED 2 is mounted on the first surface 11 side. That is, the connection terminal 111 provided on the first surface 11 side is connected to the wiring pattern for the 110 W type lighting device formed on the second surface 12 side, and the connection terminal provided on the second surface 12 side. Reference numeral 121 is connected to the wiring pattern for the 40W-type lighting device formed on the first surface 11 side. With such a configuration, when the light source substrates 1 are connected and used, the connection terminals 111 and 121 for electrically connecting the two light source substrates 1 are provided on the rear surface of the surface on which the LEDs 2 are mounted. Since the connection terminal does not block the light emitted from the light emitting element, it is possible to suppress the occurrence of uneven lighting of the lighting device using the light source substrate 1.

  Next, a description will be given of how the light source substrate 1 is used when the light source substrate 1 is used for a 40 W-type lighting device having a length of about 1.2 m and a 110 W-type lighting device having a length of about 2.4 m. When the light source substrate 1 is used in a 40W-type illumination device, as shown in FIG. 4A, the LEDs 2 are mounted only on the lands 112 arranged on the first surface 11 side of the light source substrate 1, and the two light source substrates are used. Use 1 in conjunction. Since the lands 112 on the first surface 11 side are connected by a wiring pattern for a 40 W-type lighting device, the length L1 suitable for the 40 W-type lighting device is about 1. A 2 m LED mounting board (light source mounting board) is formed. At this time, by connecting the connection terminals 121 provided on the respective second surfaces 12 of the two light source substrates 1, the two light source substrates 1 are electrically connected. Since the two light source substrates 1 are used in the 40W-type lighting device in this manner, a total of 120 LEDs 2 are used in one device.

  On the other hand, when the light source substrate 1 is used in a 110W-type lighting device, as shown in FIG. 4B, the LEDs 2 are mounted only on the lands 122 arranged on the second surface 12 side of the light source substrate 1, and four The light source substrate 1 is connected and used. Since the lands 122 on the second surface 12 side are connected by a wiring pattern for a 110W-type lighting device, a length L2 suitable for the 110W-type lighting device is about 2. A 4 m LED mounting board is formed. At this time, the four light source substrates 1 are electrically connected by connecting the connection terminals 111 provided on the first surface 11 side of each of the four light source substrates 1. Since the four light source substrates 1 are used in the 110W-type lighting device in this way, a total of 240 LEDs 2 are used in one device.

  As described above, the light source substrate 1 has the first surface 11 on which the wiring pattern for the 40W-type lighting device is formed, and the second surface 12 on which the wiring pattern for the 110W-type lighting device is formed. Thus, the same light source substrate 1 can be used for any of the two lighting devices having different power consumptions. Also, by changing the number of light source substrates 1 to be connected, two lighting devices having different dimensions (ie, a 40 W lighting device having a length of about 1.2 m and a 110 W lighting device having a length of about 2.4 m). ), The same light source substrate 1 can be used. In addition, when the LED 2 is mounted on the land included in the wiring pattern on one surface, the land included in the wiring pattern on the other surface has a function of radiating heat generated when the LED 2 is driven. The heat dissipation of the substrate 1 is improved.

  The LED 2 is mounted on the light source substrate 1, and an LED mounting substrate formed by connecting two or four LEDs is attached by being inserted into, for example, an elongated holder member 3 made of aluminum. It is housed in the lighting device while being held. FIG. 5 is a cross-sectional view showing a state in which the LED 2 is mounted on the light source substrate 1 and attached to the holder member 3 when the light source substrate 1 is used for a 40W-type lighting device. When the light source substrate 1 is used for a 40W-type lighting device, the LEDs 2 are mounted on the lands 112 on the first surface 11 side, and are connected so that the LEDs 2 are located on the opening 31 side of the holder member 3 having a C-shaped cross section. The two light source substrates 1 thus inserted are inserted into the holder member 3.

  In the present embodiment, although the wiring pattern on the first surface 11 side and the wiring pattern on the second surface 12 side are different, the land 112 included in the wiring pattern for the 40 W type lighting device arranged on the first surface 11 side is used. And a land 122 arranged on the second surface 12 side, which is included in the wiring pattern for the 110 W-type lighting device, is provided at a position substantially opposite to the ground. With such a configuration, when the LED 2 is mounted on the land 112 included in the wiring pattern on the first surface 11 side, the land 122 included in the wiring pattern on the second surface 12 side is mounted with the LED 2. Since it is located almost directly behind the land 112, it becomes easier to radiate the heat generated when the LED 2 is driven, so that the heat radiation of the light source substrate 1 can be further improved. This is because the number of LEDs 2 mounted on the first surface 11 side is basically the same as the number of LEDs 2 mounted on the second surface 12 side. The design is based on the fact that the wiring pattern for the 40W-type lighting device is not the same as the wiring pattern for the 110W-type lighting device. Not always. Even in such a case, by increasing the width of each wiring pattern, it becomes possible to arrange a large amount of metal on the surface of the base material 10 including the lands 112 and lands 122. It is possible to increase.

[Second embodiment]
Subsequently, a second embodiment of the present invention will be described. The light source substrate 1A of the present embodiment has substantially the same configuration as the light source substrate 1 of the first embodiment except that the length LA is about 120 cm. Therefore, the same reference numerals are used for the same components as those in the first embodiment, and the description of those components is omitted.

  Since the light source substrate 1A has a length of about 120 cm, it is necessary to connect and use two light source substrates 1A for use in a 110 W-type lighting device having a length of about 2.4 m. When used in a 1.2 m 40W-type lighting device, there is no need to connect and use the light source substrate 1A. For this reason, as shown in FIG. 6A, a connection terminal 111 used when the LED 2 is mounted on the second surface 12 side is provided on the first surface 11 side in the same manner as in the first embodiment. As shown in FIG. 6B, the second surface 12 is not provided with a connection terminal used when the LED 2 is mounted on the first surface 11. Note that the wiring pattern formed on the first surface 11 side is a wiring pattern for a 40 W-type lighting device, and in this embodiment, as shown in FIG. 7A, a wiring connecting 60 LEDs 2 in series. Are formed in parallel, and a total of 120 LEDs 2 are mounted on the first surface 11. On the other hand, the wiring pattern formed on the second surface 12 side is a wiring pattern for a 110 W-type lighting device, and in this embodiment, as shown in FIG. 7B, a wiring connecting 120 LEDs 2 in series. Are formed in only one system, and a total of 120 LEDs 2 are mounted on the second surface 12.

  A description will be given of how the light source substrate 1A is used when the light source substrate 1 is used for a 40W-type lighting device having a length of about 1.2m and a 110W-type lighting device having a length of about 2.4m. When the light source substrate 1A is used in a 40W-type lighting device, as shown in FIG. Used in. The lands 112 on the first surface 11 side are connected by a wiring pattern for a 40W-type lighting device, and are suitable for a 40W-type lighting device having a length LA (about 1.2 m) without connecting the light source substrate 1A. LED mounting board (light source mounting board).

  On the other hand, when the light source substrate 1A is used for a 110W-type lighting device, as shown in FIG. 8B, the LEDs 2 are mounted only on the lands 122 arranged on the second surface 12 side of the light source substrate 1A, and two The light source substrate 1A is connected and used. Since the lands 122 on the second surface 12 side are connected by a wiring pattern for a 110W-type lighting device, by connecting two light source substrates 1A, a length L3 suitable for the 110W-type lighting device is about 2. A 4 m LED mounting board is formed. At this time, the two light source substrates 1 are electrically connected by connecting the connection terminals 111 provided on the respective first surfaces 11 of the two light source substrates 1A.

  As described above, the light source substrate according to the present invention has been described with reference to the drawings. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, the length of the light source board is not limited to about 60 cm or about 120 cm, and the length of the light source board is about 30 cm, and when the light source board is used for a 40 W type illumination device having a length of about 1.2 m, four light source boards are required. When the light source substrates are connected and used, and the light source substrate is used for a 110 W type lighting device having a length of about 2.4 m, eight light source substrates may be connected and used. In addition, the length and the number of connected units can be appropriately changed according to the specifications of the lighting device.

DESCRIPTION OF SYMBOLS 1, 1A Light source board 10 Base material 11 1st surface 12 2nd surface 111, 121 Connection terminal 112, 122 Land 13 Resist film 2 LED (light emitting element)
3 Holder member

Claims (6)

A light source substrate having two surfaces, a first surface and a second surface on which a plurality of light emitting elements are mounted,
A first wiring pattern for a first lighting device is formed on the first surface;
A light source substrate, wherein a second wiring pattern for a second lighting device having a different power consumption from the first lighting device is formed on the second surface. The first lighting device is a lighting device that uses the light source substrate alone, or a lighting device that electrically connects and uses a plurality of the light source substrates.
The light source substrate according to claim 1, wherein the second lighting device is a lighting device that electrically connects and uses a different number of the light source substrates from the first lighting device.   When the first lighting device is a lighting device that uses the light source substrate alone, a connection terminal for electrically connecting a plurality of the light source substrates is provided only on the first surface. The light source substrate according to claim 2, wherein When the first lighting device is a lighting device that uses a plurality of light source substrates by electrically connecting the light source substrates, the first lighting device is configured to electrically connect the light source substrate to each of the first surface and the second surface. Connection terminals are provided,
The connection terminal provided on the first surface is used when a plurality of light emitting elements are mounted on the second surface,
The light source substrate according to claim 2, wherein the connection terminal provided on the second surface is used when a plurality of light emitting elements are mounted on the first surface.   The plurality of light emitting element mounting lands included in the first wiring pattern are provided at positions substantially opposite to the plurality of light emitting element mounting lands included in the second wiring pattern. Item 5. The light source substrate according to any one of Items 1 to 4.   A lighting device comprising: a light source mounting board on which a plurality of light emitting elements are mounted on the first surface or the second surface of the light source substrate according to claim 1.

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