JP2008289677A - Led assisting lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that light emitting direction becomes thick and the illumination has no depth feeling. <P>SOLUTION: This LED assisting lighting system is constituted by LED light sources, a reflector and a lens having a linear multi-face prism cut, the optical axes of the LED light sources are disposed to face the reflector so that substantially all the lights illuminate the reflector, and the lens is provided at a position which is illuminated with the lights of the LED light sources reflected by the reflector. The reflector is formed with a pair of reflecting surfaces spreading toward the reflecting direction of the lights so as to emit the reflected lights of the LED light sources in the lens direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an illumination device using an LED (light emitting diode) as a light source, and more particularly to an auxiliary illumination device such as a game machine or a vending machine.

  In recent years, LEDs have been developed and commercialized as various types of lighting devices with increasing brightness and multiple colors. For example, vehicle lamps and vending machine lighting.

  Lighting devices with a wide lens area such as vehicular lamps and vending machines that use LEDs as a light source must be arranged in large numbers in close contact with each other due to the narrow angle of illumination of the LEDs, which increases costs and temperature. There were problems such as performance degradation due to the rise. For this reason, in order to reduce the total number of LEDs, a technique for forming a lens provided with a prism cut has been developed and proposed.

Patent Document 1 discloses a vehicular lamp 11 using an LED as shown in FIG. The LEDs 12 are arranged in at least one row to form a linear light source of the LED (13). A lens 14 provided with a multifaceted prism cut 15 as shown in FIG. 5 is disposed in front of the LED (13) line light source. Since the polyhedral prism cut is formed by combining a plurality of different refraction angles in a cross section orthogonal to the line light source of the LED (13), the LEDs are also arranged in the orthogonal direction of the row of the LEDs (13). It looks like Therefore, there is an advantage that the total number of LEDs can be reduced.
JP-A-6-187810

  In all of the above documents, a lens is placed in the light emission direction of the LED. For this reason, the problem that the thickness of the light emission direction of the vehicle lamp 11 becomes thick has arisen. Further, in order to increase the light emission area, it is necessary to increase the total number of LEDs 12 forming the line light source of the LED (13). In some cases, a line light source of a plurality of LEDs (13) has to be arranged, and the total number of LEDs further increases.

  Furthermore, since the configuration of the lamp described above uses the direct light of the LED 12, it is difficult to solve for a device that requires soft and user-friendly warm light as auxiliary lighting.

  In the LED auxiliary illumination device comprising a lens provided with at least one LED light source, a reflector, and a linear polyhedral prism cut, the LED light source has an optical axis applied to the reflector so that the LED light source irradiates substantially all of the light to the reflector. This is solved by providing the lens at a position where the LED light source reflected by the reflector is irradiated.

  The reflector may have at least a pair of reflection surfaces that spread in the light reflection direction, and the LED light source may be disposed approximately in the middle of the pair of reflection surfaces.

  The LED light source may be disposed at a side end between the reflector and the lens.

  Further, the reflector may have a convex or concave fisheye lens shape.

  Furthermore, the LED light source may have a plurality of colors.

  With the configuration of the present invention, an LED light source is disposed between the reflector and the lens, and the direct light of the LED light source is reflected once by the reflector, thereby forming a soft warm taste illumination by indirect illumination, and a thin device for the irradiation method Has the effect of realizing. Furthermore, it has the effect of widening the light emitting area while reducing the total number of LED light sources and the number of LED elements constituting the LED light sources.

  In addition, by forming a plurality of reflecting surfaces for one LED light source and arranging a plurality of the above-described configurations, there is an effect that it is possible to provide illumination with a depth and depth that is not conventional. It is also possible to produce a brilliant appearance by applying a convex or concave fisheye lens shape to the reflecting surface of the reflector.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a representative embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. 1 for showing the emission direction from an LED light source. A substrate 2 on which the LED light source 1 is disposed is provided at the bottom (side end) between the reflector 4 and the lens 5. The LED light source 1 is disposed so as to be positioned at a substantially lower portion between the pair of reflecting surfaces 4a and 4b facing each other. For this reason, the light emitted from the LED light source 1 is reflected almost uniformly in the direction of the lens 5 by the reflecting surfaces 4a and 4b.

The reflector 4 is formed with a pair of planar reflecting surfaces 4 a and 4 b so as to spread in the reflecting direction for reflecting the light from the LED light source 1.
The extension 3 is a housing for fixing the substrate 2 on which the LED light source 1 is mounted, the reflector 4 including the reflecting surfaces 4a and 4b, and the lens 5.

  The lens 5 is subjected to linear polyhedral prism cutting as described above. In the present embodiment, FIG. 3 shows a front view when the LED light source 1 is turned on when the linear polyhedral prism cut direction is set in the vertical direction of the lens 5 and a fisheye lens is formed on the reflector 4.

  As for the light emitted from the LED light source 1, the left and right symmetric reflected light reflected by the reflecting surfaces 4 a and 4 b passes through the linear polyhedral prism cut of the lens 5, so that the virtual images of the left and right symmetric reflected light overlap. Therefore, in addition to soft light by indirect illumination, it is possible to provide illumination with a sense of depth and a sense of reality compared to the depth of an actual lighting device.

  Furthermore, since the light emitted from the LED light source 1 is reflected by the entire reflector 4, the LED light source 1 with a small number of LED elements has an advantage that the light emission area can be increased as surface illumination.

  In the present embodiment, three LED light sources 1 are arranged on the bottom of the front surface of the reflector 4, but it is also possible to install them on the upper surface or on the left and right of the reflector 4. Moreover, arrangement | positioning by the said combination may be sufficient and it does not specifically limit.

  Further, the number of LED light sources 1 to be arranged is not limited. For example, it is possible to increase the luminance of one LED light source 1 by including a large number of LED elements in one LED light source 1, and to use fewer LED light sources 1 such as one or two. In that case, by forming a large number of reflecting surfaces in the reflector 4, it is possible to obtain the same effect as in this embodiment. Further, one LED element can be used as one LED light source 1 and a large number of LED light sources 1 can be used to produce the same effect as in this embodiment.

  Further, the color of the LED element is not limited. By including LED elements of a plurality of colors in the LED light source 1 and switching the lighting elements of the LED elements, a multicolor LED auxiliary lighting device can be obtained. It is also possible to use a plurality of color LED light sources 1 to form a plurality of color lighting devices.

  The shape of the reflector 4 is not limited to the present embodiment. The reflective surfaces 4a and 4b may further be a plurality of reflective surfaces such as two upper and lower surfaces. Similarly, a plurality of left and right surfaces or a plurality of top and bottom, left and right surfaces may be used. Moreover, it is also possible to make various shapes without making the reflective surfaces 4a and 4b symmetrical.

  Furthermore, the reflector 4 is not limited to a flat surface, but may be a convex or concave fisheye lens shape. The fisheye lens shape may be a normal surface shape, an elliptical surface shape, or a free-form surface shape in a vertical or horizontal cross section.

  In the present embodiment, the linear polyhedral prism cut formed on the lens 5 is arranged in the vertical direction, but it may be formed in the horizontal direction or diagonal direction depending on the application.

  In the above-described embodiment, auxiliary illumination close to a fluorescent lamp color can be provided by using a white LED light source. In addition, by using LED light sources including three colors of red, blue, and yellow as LED elements, it is possible to provide LED auxiliary lighting that emits various colors.

  For this reason, it can be used for a display device or the like shown in the case of lighting of a gaming machine or a big hit. Moreover, it can be used for auxiliary lighting such as vending machines, warm drinks and cold drinks, and also a display device for showing out of stock. It may also be used for auxiliary lighting such as indoor interior lighting and showcases.

  As described above, according to the present invention, light that is thin in the emission direction and uses a light emitting area to the maximum with a small number of LED light sources to provide soft and deep lighting with a sense of presence.

It is a perspective view which shows typical embodiment of this invention. It is sectional drawing of FIG. 1 which shows the emitting direction of the LED light source of this invention. It is a figure which shows the front view at the time of lighting of the LED light source of this invention. It is sectional drawing which shows a prior art example. It is an expansion perspective view of the part of the linear polyhedral prism cut of a prior art example.

1 LED light source 2 Substrate 3 Extension 4 Reflector 5 Lens

Claims (5)

  In the LED auxiliary illumination device comprising at least one LED light source, a reflector, and a lens provided with a linear polyhedral prism cut, the LED light source is arranged with an optical axis directed toward the reflector so as to irradiate substantially all of the light to the reflector. The LED auxiliary illumination device, wherein the lens is provided at a position where the light from the LED light source reflected by the reflector is irradiated.   2. The LED auxiliary device according to claim 1, wherein the reflector has at least a pair of reflecting surfaces that extend in a light reflecting direction, and the LED light source is disposed approximately in the middle of the pair of reflecting surfaces. Lighting device.   3. The LED auxiliary illumination device according to claim 1, wherein the LED light source is disposed at a side end between the reflector and the lens. 4.   The LED auxiliary illumination device according to claim 1, wherein the reflector has a convex or concave fisheye lens shape.   The LED auxiliary illumination device according to claim 1, wherein the LED light source has a plurality of colors.

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