JP2006210170A - Decorative lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve cost reduction by combining a light source such as an LED having a small area of a light emitting surface and a lens having a number of multifaceted prism faces corresponding to the size of light the emitting surface of this light source in a decorative lighting device to reduce the number of LEDs dramatically. <P>SOLUTION: The adoption of a point light source of LED 3, the formation of a multifaceted prism 4a adjusted to the light emission size of the LED 3, and their combination sharpen the separation of an optical image of the LED 3 through the multifaceted prism 4a, reduce the number of the LEDs for use, and down on cut running cost. Covering a substrate 2 with a hologram prevents the appearance from being spoiled even in bright light. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention, for example, in a game hall where individual gaming machines are arranged in a panel shape, and each gaming machine is laid out so that one player can play a game exclusively for each gaming machine. A decorative lighting device that is attached to the peripheral edge of the game machine so that the operating state between adjacent game machines is not clearly known in the vicinity so as not to impair the concentration of the player and improve the aesthetics. It is concerned.

  FIG. 8 shows an example of a conventional lamp 90 using this type of linear polyhedral prism 91. In this lamp 90, the front surface of the LED 93 aligned in the vertical direction with respect to the paper surface in the state shown in the drawing is shown. A plurality of linear polyhedral prism cuts 91 as shown in FIG. 9 are arranged in the same direction in the longitudinal direction and attached to a plate-like lens 92.

  In this state, when the LED 93 is turned on and the lighting state is viewed from the lens 92 side, as shown in FIG. 10, in addition to the X direction in which one row of LEDs 93 are aligned, a plurality of lights are also emitted in the Y direction perpendicular thereto. The image H appears, as if a larger number of LEDs are used than the LEDs 93 actually used, and the brilliantness is improved and the aesthetics are increased, and the cost can be reduced.

In the lamp 90 described above, instead of the LED 93 as a light source, for example, a cold cathode fluorescent tube, a neon tube, or the like can be adopted. In this case, a plurality of luminous lines are arranged in the X direction (see FIG. 10)), and similarly, it is said that splendor can be produced at a low cost.
Japanese Patent Laid-Open No. 06-187810

  However, in the above-described conventional decorative lighting device, when the light source such as the LED 93 is not turned on, the linear polyhedral prism cut 91 on the lens 92 surface, the color of the substrate on which the LED 93 is attached, the state of the wiring, etc. It will be visible, and will be significantly detrimental to aesthetics.

  In addition, the number of LEDs 93 seems to increase in the Y direction, but the same number of LEDs 93 as in the past is required in the X direction, that is, in the column direction, and the number of LEDs 93 cannot be significantly reduced. The cost reduction was not expected.

  The present invention provides a lighting device comprising a plurality of point light sources mounted in a predetermined arrangement on a substrate, a light guide, and a lens having a polygonal prism as specific means for solving the above-described conventional problems. The light guide includes an incident portion that receives light from the point light source, a reflecting portion that reflects light incident on the incident portion in a substantially light exit direction, and light incident on the incident portion. A light guide unit that guides the light to the reflection unit, a light emission unit that emits the light reflected by the reflection unit to the outside, and a light amount adjustment unit that gives intensity to the light emitted from the light emission unit in at least one direction are provided. The present invention solves the problem by providing a decorative illumination device, wherein a lens having a plurality of polyhedral prisms is provided on the light guide.

  According to the present invention, one LED is obtained by combining a light source such as an LED having a light emitting surface with a small area and a lens having a plurality of polygonal prism surfaces corresponding to the light emitting area of the light source. In the width direction of the multi-faceted prism, it is shown to be increased to the same number as the number of faces of the multi-faceted prism, and in the longitudinal direction of the multi-faceted prism, it is shown to be increased to the same number as the reflecting portion provided in the light guide, This significantly reduces the number of LEDs to be used, and has an extremely excellent effect on cost reduction.

  In addition, by covering the substrate surface on which the LED is mounted with a reflective or transmissive hologram, the internal structure such as the surface of the substrate cannot be seen even when the LED is turned off. It also reflects the beautiful light unique to holograms and eliminates unnecessary power consumption, such as turning on only for the purpose of preventing the inside from being looked at during the daytime, and has an excellent effect on reducing running costs. Is.

  Below, this invention is demonstrated in detail based on embodiment shown in a figure. First, what is shown in FIG. 1 is to explain the basic operation of the decorative lighting device 1 according to the present invention, and what is indicated by reference numeral 2 in the figure is a substrate. A light source that has a small area and is substantially regarded as a point light source is attached.

  A lens 4 is provided above the LED 3 (that is, the viewing direction), and a polygonal prism 4 a is formed on the lens 4. In the figure, a multifaceted prism 4a is formed on the surface of the lens 4 on the LED 3 side. However, considering the surface of the faceted surface of the multifaceted prism 4a due to dust adhesion, foreign object collision, etc., as shown in FIG. However, the present invention is not limited to being provided inside.

  FIG. 2 shows a state in which the LED 3 is turned on as viewed from the lens 4 side. When the light emitted from the LED 3 reaches each side of the polyhedral prism 4a, the state shown in FIG. In general, the light is refracted upward and is directed in the vertical direction with respect to the outer surface of the lens 4.

  Therefore, when the polygonal prism 4a is formed with five sides, the light images G of the five LEDs 3 are arranged in a direction orthogonal to the polygonal prism 4a. At this time, the respective light images G are as much as possible. If the inclination, inclination, width, etc. of each side of the polygonal prism 4a are determined so as to have the same size and shape, the beauty is improved. Further, if the light emission color of the LED 3 attached to each of the polygonal prisms 4a is changed, the color of the row is different for each prism 4a, and the beauty is further improved.

  The above describes the method of increasing the light image G in the direction orthogonal to the polygonal prism 4a. To reduce the number of LEDs 3 used, the apparent number is also provided in the direction parallel to the polygonal prism 4a. It is also effective to increase. Therefore, the present invention also provides means that enables the number of LEDs 3 to be reduced in the direction parallel to the polyhedral prism 4a by providing the light guide 5 below the polyhedral prism 4a.

  FIG. 3 shows an example of the configuration of the light guide 5 in a simplified manner. The light guide 5 is formed of a transparent resin member and is formed as a plane substantially parallel to the lens 4. 5a, an incident portion 5b provided as a short side substantially perpendicular to one end portion of the light guide portion 5a, and a state of rising upward from the end portion where the incident portion 5b is provided to the other end portion The reflection part 5c provided is formed in a substantially wedge shape.

  Further, on the light exit surface 5d side of the light guide 5, there is a light exit portion 5e, and a light quantity composed of a plurality of strip-shaped grooves or projections that give strength to at least one direction of light emitted in this light exit direction. An adjustment means is formed.

  As described above, since the light guide 5 is formed in a substantially wedge shape, the light incident on the light guide 5 from the incident portion 5b is reflected by the refractive index (about 1.5) of the resin member on which the light guide 5 is formed, and the atmosphere. Difference in refractive index (about 1.0) causes total reflection to the high refractive member side at the boundary surface between them (Snell's law), and it is made substantially wedge-shaped while repeating reflection in the light guide portion 5a. The light guide 5 is directed toward the tip.

  At this time, if a light emitting portion 5e is provided on the light emitting surface 5d so that the light reaching the light guide portion 5a has an angle at which total reflection does not occur, the light guide incident from the incident portion 5b is provided. 5 is emitted to the outside from the light emitting portion 5e, and the light emitting portion 5e is emitted from the light guide 5 if the light emitting portion 5e is formed at a constant pitch on the light emitting surface light guide portion 5d. The emitted light can be strong or weak in this pitch direction. That is, the light emitting section 5e serves as a light amount adjusting means 5f that gives the light emitted from the light guide 5 in one direction. By doing in this way, the effect | action that several LED is arrange | positioned along the longitudinal direction of the polyhedral prism 4a is acquired.

  Here, as described above, the light guide 5 is formed in a substantially wedge shape by the light emission surface 5d and the reflection portion 5c, and a plurality of light emission portions 5e are provided on the light emission surface 5d side. If it is provided, it can be expected that the amount of light propagating inside decreases as the distance from the incident portion 5b increases.

  Therefore, in the present invention, for example, when the light emitting portion 5e is formed to have a larger width as the distance from the incident portion 5b increases, the distance from the incident portion 5b can be reduced. It is also possible to use the light amount adjusting means 5f so that the near and far distances can be viewed with the same brightness.

  In the above description, the incident portion 5b is provided on one side of the light guide 5 and light is incident on the light guide 5 from one LED. As shown in FIG. 4, the light guide 5 is provided with incident portions 5b at both ends, the reflection portion 5c is thin at the center, and the light guide 5 described above is faced and integrated as shown in FIG. It is also free to have a shape.

  Further, in the above description, the light amount adjusting unit 5f has been described as being provided on the light guide unit 5a side, but this is not limited, and may be provided on the reflecting unit 5c side. It is.

  FIG. 5 shows still another embodiment of the light guide 5, which is different from the above embodiment in the arrangement direction of the light source 3, the reflection surface 5 g that reflects the light of the light source 3, and the reflection portion 5 c. Since the other components are the same, detailed description thereof is omitted here.

  The light source 3 is provided in the same direction as the light emission direction of the light guide 5, and irradiates light onto the reflection surface 5 g provided at the end of the light guide 5. The reflecting surface 5g reflects light in a direction substantially orthogonal to the light emission direction of the light guide 5, and guides the light to the light guide 5a. Further, the reflecting surface 5c is formed in a stepped shape, thereby providing a function of the light amount adjusting means 5f that gives the emitted light in one direction.

  FIG. 6 shows another embodiment of the decorative lighting device 1 according to the present invention. In the above-described embodiment, the lens 4 or the multifaceted prism 4a is illuminated only by the lighting of the LED 3, that is, the point light source. Explained as what to do. This is because the decorative lighting device 1 of the present invention is formed on the premise that the lighting is continued at least during use (business). The decoration effect in such a bright place that does not show such an effect can not be expected so much. Rather, the color of the surface of the substrate 2 and the internal structure can be seen and the appearance may be impaired. There is.

  In the present invention, in order to solve this problem, the surface of the substrate 2 on the lens 4 side is provided with irregularities or grooves at fine intervals, causing interference at the wavelength level in the light, and the rainbow by the external light. A hologram tape, a grating tape, or a tape-like member simply referred to as a hologram (hereinafter referred to as a hologram 6) that causes a color pattern is attached.

  And in this embodiment, the lens 4 which has LED3, the light guide 5, and the polyhedral prism 4a is attached to the board | substrate with which the hologram 6 was affixed similarly to the past. Accordingly, when the LED 3 is turned on at night or the like, the display by the LED 3 and the multi-faceted prism 4a is dominant, and when there is abundant external light such as daytime, the display by the reflected light from the hologram 6 that can be seen through the multi-faceted prism 4a is dominant. If only the display from the hologram 6 is sufficient, the LED 3 can be turned off, power consumption is reduced, and running cost can be further reduced.

  FIG. 7 shows still another embodiment of the present invention as a main part. In this embodiment, the appearance of the daytime is further improved and the power consumption is reduced. When there is a lot of use, or when there is much use in a bright place, a corresponding effect is exhibited.

  In yet another embodiment, the surface of the substrate 2 may have the hologram 6 stuck on the entire surface as in the previous embodiment, or the hologram 6 may be stuck in a checkered pattern. Although it may be worn, the LED 3 and the light guide 5 are also attached in a checkered pattern. Note that when the hologram 6 is attached in a checkered pattern, the hologram 6 and the section to which the LED 3 and the light guide 5 are attached do not overlap.

  With this configuration, when the LED 3 is turned on, half of the compartments provided with the LEDs 3 of the decorative lighting device 1 are turned on in a checkered pattern, and each compartment provided with the LEDs 3 is As described above, line-shaped light beams are generated in the vertical and horizontal directions via the multi-faceted prism 4a.

  In the remaining half of the section, the rainbow-like pattern appears to be deformed by the multi-faceted prism 4a due to the external light, and the appearance changes according to the change in the brightness of the external light. An expression that changes to In particular, when the hologram 6 is attached to the entire surface of the substrate, depending on the brightness of the outside light, even if the LED 3 including the light guide 5 is turned off or removed, a sufficiently beautiful display is performed. It becomes.

  The hologram 6 includes a reflection type in which a color and a pattern can be seen with reflected light, and a transmission type in which a color and a pattern can be seen with transmitted light. In the present invention, a transmission type may be used. Is omitted, but the LED 3 or the light guide 5 and the polygonal prism 4a may be attached.

It is sectional drawing which shows the principle of operation of the decorative illuminating device which concerns on this invention. It is explanatory drawing which shows the effect | action of the polyhedral prism of the decorative illuminating device which concerns on this invention. It is explanatory drawing which shows the structure of the light guide which is the principal part of this invention. It is explanatory drawing which similarly shows another structure of a light guide. It is explanatory drawing which shows another embodiment of a light guide similarly. It is sectional drawing which shows another embodiment of the illuminating device for a decoration similarly concerning this invention. It is explanatory drawing which shows another embodiment of the decoration illuminating device which concerns on this invention in the principal part. It is sectional drawing which shows a prior art example. It is a perspective view which fractures | ruptures and shows some linear polyhedral prisms of a prior art example. It is explanatory drawing which shows the lighting state of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Decorative lighting device 2 ... Substrate 3 ... LED
DESCRIPTION OF SYMBOLS 4 ... Lens 4a ... Polyhedral prism 5 ... Light guide 5a ... Light guide part 5b ... Incident part 5c ... Reflection part 5d ... Light emission surface 5e ... Light emission part 5f ... Light quantity adjustment means 5g ... Reflection surface 6 ... Hologram

Claims (7)

  An illumination device comprising a plurality of point light sources mounted in a predetermined arrangement on a substrate, a light guide, and a lens having a multifaceted prism, wherein light incident from the point light source is incident on the light guide A reflecting portion that reflects light incident on the incident portion in a substantially light exit direction, a light guide portion that guides light incident on the incident portion to the reflecting portion, and light reflected by the reflecting portion externally A light emitting unit that emits light, and a light amount adjusting unit that provides intensity in at least one direction to light emitted from the light emitting unit, and a lens having a plurality of polyhedral prisms is provided on the light guide. A decorative lighting device characterized by comprising:   2. The decorative lighting device according to claim 1, wherein the substrate is covered with a reflection hologram by forming an entire surface or a section having an arbitrary shape.   The decorative illumination device according to claim 1 or 2, wherein a light intensity direction formed by the light amount adjusting means of the light guide is substantially equal to a direction in which the polyhedral prisms are arranged.   The light quantity adjusting means of the light guide is a strip-shaped protrusion provided in the light emitting portion or a strip-shaped groove provided in the reflecting portion. The decorative lighting device according to 1.   5. The decorative illumination device according to claim 1, wherein the hologram is a transmission type, and is disposed between the light guide and a lens having the polyhedral prism.   6. The decorative illumination device according to claim 5, wherein a reflector is provided on a back side of the light source that is opposite to the transmission hologram. It consists of a reflection hologram or transmission hologram and a lens having a polyhedral prism arranged on the hologram, and a light source is provided below the transmission hologram or on the surface of the reflection hologram as necessary. An ornamental lighting device characterized by being made.

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