JP6032586B2 - Light guide plate, lighting device, light guide plate manufacturing method, and lighting device manufacturing method - Google Patents

Description

  The present invention relates to a light guide plate, a lighting device, a method for manufacturing a light guide plate, and a method for manufacturing a lighting device, and more particularly, to a light guide plate, a lighting device, a method for manufacturing a light guide plate, and a method for manufacturing a lighting device.

  A conventional illumination device is disclosed in, for example, Japanese Patent Application Laid-Open No. 2007-141735 (hereinafter referred to as “Patent Document 1”).

  According to Patent Document 1, a double-sided light emitting panel including a light guide plate having a plurality of plasma lamps on an end surface, a transparent acrylic plate provided on both sides of the light guide plate, and an advertising medium provided on the acrylic plate is provided. Disclosure. Here, as a transparent substrate used for the light guide plate, a highly transparent substrate such as polymethyl methacrylate, (meth) acrylate copolymer, polycarbonate, polystyrene, polyvinyl chloride, or glass is used. Light diffusing material using transparent or white pigment is mixed.

JP 2007-141735 A

  The conventional lighting device using the light guide plate is configured as described above. In the manufacture of the light guide plate, printing of dots for reflection is performed with resin ink. Therefore, in order to dry the ink after printing, it is managed so as not to touch it, and when the lighting device is used at a high temperature, the printing section is aligned to protect the printing surface so as to avoid carbonization of the ink. There was a problem that it was necessary to cover with glass or the like, and the cost was high.

  The present invention has been made to solve the above-described problems, and can be used at a high temperature and is inexpensive. A light guide plate, a lighting device, a method for manufacturing the light guide plate, and a method for manufacturing the lighting device. The purpose is to provide.

  The light guide plate according to the present invention includes glass. Glass has dots for reflecting light, and the dots are formed by ceramic printing on the glass.

  Preferably, the light guide plate has a curved surface.

  More preferably, the ink used for ceramic printing includes an inorganic pigment.

  In another curved surface of the present invention, the lighting device uses the light guide plate described above.

  In still another curved surface of the present invention, the light guide plate manufacturing method includes a step of preparing a glass plate, and a step of printing dots on a predetermined portion of the glass plate by ceramic printing.

  In the present invention, when printing dots on glass, the dots are printed using ceramic ink, so the printed dots are integrated with the glass and become tempered glass.

  As a result, it is possible to provide a light guide plate that can be used at high temperatures and does not cost much.

  Moreover, the illuminating device using this light-guide plate can be used semipermanently.

It is a figure which shows the illuminating device which concerns on one embodiment of this invention. It is a figure which shows the manufacture procedure of the light-guide plate which concerns on one embodiment of this invention. It is a figure which shows the illuminating device which concerns on other embodiment of this invention. It is a figure which shows the state which displayed the specific advertising character in the illumination area. It is a figure which shows the state which curved-surface-processed the illuminating device.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an illumination device 10 according to an embodiment of the present invention. 1A is a cross-sectional view of the lighting device 10 (a diagram indicated by an arrow IA-IA in FIG. 1B), and FIG. 1B is an arrow view indicated by an arrow IB-IB in FIG. FIG.

  Referring to FIG. 1, lighting device 10 includes light guide plate 11 made of a material having transparency such as rectangular glass having one surface 12 a and the other surface 12 b facing each other, and one surface of light guide plate 11. The dot pattern (dot-like print pattern) 13a... 13d printed with ceramic ink provided on the 12a side faces the light guide plate 11 at the end face connecting one surface of the light guide plate 11 and the other surface facing the other surface. LED light source 20 provided at the position.

  Here, the dot pattern 13 is provided to scatter the light incident thereon to the outside. That is, the light emitted from the LED light source 20 to the light guide plate 11 is reflected by one surface and the other surface of the light guide plate 11 and propagates in the direction indicated by the arrow in the figure. At this time, the light incident on the dot pattern 13 is scattered to the outside at that point (indicated by a dotted line a in the figure). Therefore, light is emitted to the outside from the position where the dot pattern 13 is provided. Further, a part of the light incident on the dot pattern 13 is irradiated to the outside from the other surface 12b as indicated by a dotted line b in the figure.

  When the light guide plate 11 extends to a position away from the light source 20, the intervals d1, d2,... Where the dot patterns 13 are provided are arranged so that d1 <d2 <d3 <. By providing the dot pattern 13 in this manner, it is possible to irradiate with a uniform light amount on both surfaces of the light guide plate 11 up to a position away from the light source 20.

  Here, the dot pattern 13 is provided only on the one surface 12a side, but may be provided on the other surface 12b side. If it does so, since the irradiation amount of the light on both surfaces increases, the brighter illumination device 10 can be provided.

  Note that the light source 20 is provided with a plurality of LEDs in the longitudinal direction of the light source 20 (vertical direction in FIG. 1B).

  In addition, here, the LED light source 20 is provided at a position facing one end face of the light guide plate 11.

  In the illumination device 10 according to this embodiment, the light guide plate 11 for irradiating light is formed of a material having transparency such as glass, and the dot patterns 13a and 13b printed with ceramic ink only on one surface 12a thereof, Are provided, and the surface provided with the dot patterns 13a, 13b,... Functions as a light emitting surface, so that surface emission from one surface and the other surface is possible and transparency is provided.

  As a result, the illuminating device 10 having transparency can be provided.

  The glass used as the light guide plate 11 is preferably white glass with few impurities, excellent transparency, and high transparency.

  Next, the manufacturing method of the light-guide plate comprised with the glass which concerns on this embodiment is demonstrated. FIG. 2 is a view showing, for each step, a manufacturing process of a light guide plate made of glass according to this embodiment. With reference to FIG. 2, first, glass for a light guide plate is prepared (step S11, hereinafter, steps are omitted). Next, dots are printed at predetermined positions on the glass using ceramic ink. The ceramic ink preferably contains an inorganic pigment such as titanium (S12). Next, the glass printed with the ceramic ink is heated to 700 to 800 ° C. to integrate the ink and the glass (S13). At this time, you may process so that the glass of a light-guide plate may become a curved surface as needed (S14). This processing is also performed at 700 to 800 ° C.

  In the light guide plate manufactured in this way, the dots printed with ceramic ink are completely vitrified and fused to the glass body, so the chemical resistance and wear resistance that were the weak points of conventional resin inks Is greatly improved, and there is no fear of yellowing due to aging of the resin over the years.

  Furthermore, in the past, two glasses had to be supplemented with a glass with a dot printing surface for chemical resistance and abrasion resistance. .

  Then, an illuminating device is manufactured using the light guide plate manufactured in this way.

  Next, another embodiment of the present invention will be described. FIG. 3 is a diagram showing an illumination device 10a according to another embodiment of the present invention. 3A and 3B correspond to FIGS. 1A and 1B in the above embodiment.

  Referring to FIGS. 3A and 3B, this embodiment is different from the embodiment of FIG. 1 in that the illumination area 14 provided with the dot pattern 13 is different. That is, in the previous embodiment, the entire illumination device 10 was an illumination region. However, in this embodiment, the illumination region 14 is provided only at the center of the illumination device 10a and surrounds the illumination region 14. A transparent region 15 is provided. Since the other points are the same as in the previous embodiment, the same reference numerals as those in FIG.

  By configuring the illumination device 10a as described above, the entire light guide plate 11 is not an illumination device, and only the illumination region 14 provided with the dot pattern is an illuminable region, and other portions are transparent regions. It becomes possible to leave as. The illumination region 14 is not limited to the central portion of the light guide plate 11 and may be provided in any part of it.

  Moreover, the illumination device 10a itself can be used as an advertising device by making the shape of the illumination area 14 a specific character or a specific shape. FIG. 4 is a diagram showing a configuration in this case, and corresponds to FIG. Referring to FIG. 4, in this embodiment, a specific advertisement character (ABC) 17 is displayed in illumination area 14.

  The advertisement display including the advertisement character 17 may cause the advertisement itself to emit light, may cause only the desired portion to emit light, may create an advertisement using a dot pattern, A desired advertisement display may be provided on the illumination area 14.

  Next, still another embodiment of the present invention will be described. FIG. 5 is a view showing still another embodiment of the present invention. As shown in FIG. 5A, in this embodiment, in the lighting device 10c, the light guide plate 18 has a two-dimensional curved surface. Since the light guide plate 18 has a two-dimensional curved surface, the illumination area 14 also has a two-dimensional curved surface.

  In the example shown in FIG. 5B, the light guide plate 19 of the lighting device 10d has a three-dimensional curved surface. Since the light guide plate 19 has a three-dimensional curved surface, the illumination area 14 also has a three-dimensional curved surface. Accordingly, it is possible to provide an illumination device using a light guide plate having an arbitrary curved surface including a dome shape, and an advertising device using the same.

  Also, gradation is possible by changing the density of dots on an arbitrary curved surface. Since a uniform gradation pattern can be printed, a lighting device having a desired gradation can be provided. In the figure, a black circle indicates a dot pattern.

  In the above embodiment, the case where the LED is used as the light source has been described. However, the present invention is not limited to this, and a fluorescent lamp, a cold cathode ray tube, or the like may be used as the light source.

  Moreover, it is good also as a lighting installation which provided the above-mentioned illuminating device in multiple numbers, set it as large sized lighting installation, or displayed the desired advertisement.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  According to the present invention, it is possible to provide an illumination device that uses a light guide plate that can be used at a high temperature and that is not costly. Therefore, the illumination device is advantageously used.

  DESCRIPTION OF SYMBOLS 10 Illuminating device, 11 Light guide plate, 12a One side, 12b The other side, 13 Dot pattern, 14 Illumination area, 15 Transparent area, 20 LED light source.

Claims (5)

Glass,
The glass has dots for reflecting light,
The dots are formed by ceramic printing on the glass,
The ink used for the ceramic printing includes an inorganic pigment,
The ceramic printed dots are heated together with the glass to a predetermined temperature and integrated with the glass,
The predetermined temperature is 700 to 800 ° C.
Light guide plate.   The light guide plate according to claim 1, wherein the light guide plate has a curved surface.   The illuminating device using the light-guide plate of Claim 1 or 2. Preparing a glass plate;
Printing dots on a predetermined portion of the glass plate by ceramic printing,
The ink used for the ceramic printing includes an inorganic pigment,
The ceramic printed dots are heated together with the glass to a predetermined temperature and integrated with the glass,
The predetermined temperature is 700 to 800 ° C.
Manufacturing method of light guide plate. Preparing a light guide plate manufactured according to claim 1;
Manufacturing the lighting device using the light guide plate.

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