JP2007109447A - Planar lighting source - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a planar lighting source composed of a belt-shaped LED unit formed by mounting a plurality of LEDs connected to each other on a belt-shaped base plate with an appropriate distance, having switching circuits interposed between the LEDs at appropriate positions. <P>SOLUTION: The planar lighting source made to constitute an illumination body having a prescribed area is formed by preparing the belt-shaped LED unit formed by mounting a plurality of LEDs connected to each other on a belt-shaped base plate with an appropriate distance, having switching circuits interposed between the LEDs at appropriate positions, intercalating a switching circuit at an appropriate position between the LEDs, and arranging the plural number of the LED units at a given interval and connecting them sequentially. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a planar illumination light source used for indoor interiors and further for applications such as advertisements or store displays, and more specifically, a so-called corton film, which is a fluoroscopic image of scenery, products, etc., is irradiated with illumination from the back. The present invention relates to a planar illumination light source for a Colton box that is clearly seen through.

Conventionally, as this kind of illumination light source,
As in Japanese Patent Application Laid-Open No. 9-330049 (see Patent Document 1), in the mounting structure of an electric decoration member such as an LED for light decoration, a flexible portion of any member or a portion that bends due to weight reduction. In order to make it easy to decorate the light, and to provide it at a low price, a strip-shaped printed circuit board is formed with a flexible insulating member, and a printed circuit is printed on both sides of the printed circuit board. A plurality of electrical decoration members connected in parallel or in series from the side of the printed circuit board.

As disclosed in Japanese Patent Laid-Open No. 2001-154613 (see Patent Document 2), in order to provide a thin and light panel type display module, a large number of LED lamps are vertically pitched on the surface of a rectangular printed wiring board. A total of three rows of the first to third color LED lamp rows mounted on the straight line are arranged in parallel with pitches equal to or less than the pitch to form a three primary color LED lamp row set, and a plurality of three primary colors LED lamp row sets are arranged in parallel with four or more pitches of the pitch, and one or more integrated circuits each in a non-lamp strip-like area having a width of two or more times the pitch between adjacent three primary color LED lamp row sets. The total distance between the right and left LED lamp rows and the right and left ends of the wiring board is approximately equal to or slightly smaller than the pitch, and the connector mounted on the end of the wiring board The line connecting the ED lamp and an integrated circuit pattern - that is down form.

As disclosed in Japanese Patent Application Laid-Open No. 10-83148 (see Patent Document 3), the colored light of the LED, which is a single wavelength light source, is selected and the illumination device emits light in an arbitrary color, so that the colorization and the illumination effect are achieved. In order to improve the quality of the LED light-emitting body, a large number of LED linear light emitters are mounted on a support of a light-transmitting silicone molded product in which a large number of cylindrical bottoms arranged at equal intervals are connected by rod-like connecting parts. This LED lamp is housed and covered with a plastic plate made of light-transmitting acrylic resin. When each LED lamp of the LED linear light emitter is lit, the light emitted from the LED linear light emitter is plastic. It is designed to be released through the plate.

As disclosed in Japanese Patent Application Laid-Open No. 4-372433 (see Patent Document 4), a new automobile sign that is easy to mount, has no light leakage reflected from the rear windshield, and can increase the illuminance. For the purpose of providing a lamp, a plurality of LEDs are arranged on the front surface of the printed circuit board, and the printed circuit board is fixed to the outer surface of the rear windshield with bolts, and a box-shaped transparent cover that covers the front surface side of the printed circuit board is provided. -The body is fixed to the rear windshield by bonding.
Etc. are known.

In general, in planar illumination that illuminates a predetermined area, a plurality of light sources such as cold-cathode tube lamps are arranged at predetermined intervals at the end of an acrylic light guide plate having a predetermined thickness, and the lower surface of the acrylic light guide plate A backlight type illumination device that emits light in a planar shape from the surface of an acrylic light guide plate with a reflective layer made of white diffusing dots printed on is well known.

However, in the conventional backlight type illumination device, it is necessary to arrange the light source in a linear shape, so that it is difficult to obtain a sufficient amount of light, and it is very difficult to increase the amount of light due to problems such as heat generation in the light source. was difficult.
On the other hand, in the case where a light source composed of a fluorescent lamp such as a cold cathode tube lamp is arranged over almost the entire area as a planar illumination for illuminating a predetermined area, there is of course a problem such as heat generation in the light source. There is a limit in reducing the thickness of the light source portion, and there is a problem that the illumination device portion becomes heavy.

In such a case, if a surface illumination that illuminates a predetermined area using the LEDs as in Patent Documents 1 to 4 is configured, a substrate corresponding to the area is created, and a plurality of substrates are formed on the substrate. LEDs are mounted at predetermined intervals so that light is emitted from almost the entire surface of the substrate.
For example, Japanese Patent Laid-Open No. 2001-154613 (see Patent Document 2) discloses a first to third color LED lamp array in which a large number of LED lamps are mounted on a surface of a rectangular printed wiring board in a vertical line with a pitch. A panel type display module is shown in which a total of three rows are arranged in parallel with pitches equal to or less than the pitch and formed into a set of three primary color LED lamp rows.
The idea of creating a substrate corresponding to the area and mounting a plurality of LEDs on the substrate at a predetermined interval to emit light from almost the entire surface of the substrate is to form the substrate according to the shape of the light emitting surface. Therefore, the same applies to Patent Documents 1, 3 and 4 apart from the fact that it is not a rectangle but a band.
JP 9-330049 A JP 2001-154613 A Japanese Patent Laid-Open No. 10-83148 JP-A-4-372433

However, when a substrate corresponding to the area is prepared and a plurality of LEDs are mounted on the substrate at predetermined intervals to emit light from almost the entire surface of the substrate, the substrate corresponding to the area of the panel in the panel display It is necessary to create a plurality of LEDs and mount a plurality of LEDs at predetermined intervals.
However, it is very time-consuming to individually prepare the substrates according to the panel area, and in recent years when many kinds of products are required to be produced in small quantities, the production cost is high and the cost is also high. There was a big problem.

On the other hand, each LED is individually mounted on a substrate, the substrate on which these LEDs are mounted is arranged according to the area of the panel, and it is very laborious and inefficient to connect them to each other. There was also a problem with cost.

In view of this, the present invention provides a planar shape composed of a strip-shaped LED unit in which a plurality of LEDs are mounted on a strip-shaped substrate at predetermined intervals, the LEDs are connected, and a switch circuit is interposed at an appropriate position between the LEDs. The object is to provide an illumination light source.

That is, the planar illumination light source of the present invention is a strip-shaped LED unit in which a plurality of LEDs are mounted on a strip-shaped substrate at predetermined intervals, the LEDs are connected, and a switch circuit is interposed at an appropriate position between the LEDs. The illuminating body having a predetermined area is configured by arranging a plurality of the LED units at predetermined intervals and sequentially connecting them.

The planar illumination light source according to the present invention is characterized in that, in the band-shaped LED unit, a plurality of LEDs are selectively turned on or off by a switch circuit interposed at an appropriate position between the LEDs. It is.

The planar illumination light source of the present invention is also characterized in that the respective strip-shaped LED units can be sequentially connected by a connector.

As described above, the planar illumination light source according to the present invention has a plurality of LEDs mounted on a strip-shaped substrate at a predetermined interval, connects the LEDs, and interposes a switch circuit at an appropriate position between the LEDs. Therefore, the substrate corresponding to the area can be formed simply by arranging a plurality of strip-shaped LED units at a predetermined interval.
Further, by appropriately adjusting the interval between the strip-shaped LED units, the density and brightness of the illumination can be easily adjusted, and illumination according to the needs can be obtained easily and quickly.

Of course, different from the inefficient method of mounting individual LEDs on the board individually, arranging the boards on which these LEDs are mounted according to the area of the panel, and connecting them to each other, it is possible to install them efficiently. I can do it now.

Next, an embodiment of a planar illumination light source according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of a planar illumination light source comprising an LED according to the present invention, and FIGS. 2A, 2B, and 2C are respectively planar views of the planar illumination light source comprising an LED according to the present invention. It is the expanded view, longitudinal cross-sectional view, and horizontal cross-sectional view which show the state installed in.

1 and 2 (a), 2 (b), and 2 (c), the planar illumination light source of the present invention includes a belt-like substrate 101 made of an epoxy resin laminate, a polyester resin flexible substrate, or the like. A strip-shaped LED unit 100 on which a plurality of, for example, white LEDs 102 are mounted at a predetermined interval is provided on 101.
The plurality of LEDs 102 are connected by a circuit, a wire, or the like (not shown) formed on the substrate 101, and a power source, a power circuit, or the like is connected from the electrode 103 provided at the end of the substrate 101 via the connectors 104, 105, etc. The band-shaped LED unit 100 is electrically connected to the above.
On top of that, a plurality of LED units 100 are arranged in a plane shape at a predetermined interval and are sequentially connected to constitute an illumination light source 13 having a plane shape with a predetermined area.

The band-shaped LED unit 100 has a switch circuit 106 interposed at an appropriate position between the LEDs 102 mounted on the substrate 101. The individual LED 102 mounted on the substrate 101 is selectively turned on and off. By increasing or decreasing the number of LEDs 102 to be lit, the density and brightness of a planar illumination light source can be easily adjusted, and illumination according to needs can be obtained easily and quickly.

The strip-shaped LED unit 100 is electrically connected to a power source, a power circuit, or the like from the electrode 103 provided at the end of the substrate 101 via connectors 104, 105, etc. It is desirable that the strip-shaped LED units 100 are connected by a cord 107 and assembled in a planar shape with the pair of strip-shaped LED units 100 as a unit.
Of course, two or more strip-shaped LED units 100 may be connected by a cord 107, and the two or more strip-shaped LED units 100 may be assembled in a planar shape as a unit.

2A, 2B, and 2C illustrate the case where a plurality of strip LED units 100 are arranged in parallel in a predetermined direction, but the strip LED units 100 are alternately arranged vertically and horizontally. Alternatively, they may be arranged in a plane, such as concentric or staggered, as appropriate.

The present invention relates to a planar illumination light source used as an indoor interior and for applications such as advertisements or store displays (for example, a Colton box). It can also be applied to other displays that illuminate a so-called corton film of a transparent positive image with a back illumination, and are limited to uses such as a display unless departing from the content of the present invention. It is not something.

It is a top view which shows one Example of the planar illumination light source which consists of LED of this invention. (A), (b), (c) is the expansion | deployment figure, longitudinal cross-sectional view, and cross-sectional view which respectively show the state which installed the planar illumination light source which consists of LED of this invention in planar shape.

Explanation of symbols

100 Strip LED unit 101 Substrate 102 LED
103 Electrode 104, 105 Connector 106 Switch circuit 107 Code

Claims (3)

A plurality of LEDs are mounted at a predetermined interval on a band-shaped substrate, each LED is connected, and a band-shaped LED unit having a switch circuit interposed at an appropriate position between the LEDs is prepared. A planar illumination light source characterized in that a plurality of illumination bodies having a predetermined area are configured by arranging a plurality of them at intervals and sequentially connecting them. 2. The planar illumination light source according to claim 1, wherein in the band-shaped LED unit, a switch circuit interposed at an appropriate position between the LEDs selectively turns on or off the plurality of LEDs. The planar illumination light source according to claim 1 or 2, wherein each strip-shaped LED unit can be sequentially connected by a connector.

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