JP2004041399A - Surface light emitting body and brain wave stimulator using the same - Google Patents

Surface light emitting body and brain wave stimulator using the same Download PDF

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Publication number
JP2004041399A
JP2004041399A JP2002202247A JP2002202247A JP2004041399A JP 2004041399 A JP2004041399 A JP 2004041399A JP 2002202247 A JP2002202247 A JP 2002202247A JP 2002202247 A JP2002202247 A JP 2002202247A JP 2004041399 A JP2004041399 A JP 2004041399A
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Japan
Prior art keywords
light
light emitting
guide plate
emitting diode
light source
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Pending
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JP2002202247A
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Japanese (ja)
Inventor
Etsuro Murayama
村山 悦朗
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VANGUARD KK
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VANGUARD KK
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Priority to JP2002202247A priority Critical patent/JP2004041399A/en
Publication of JP2004041399A publication Critical patent/JP2004041399A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To providing a light emitting body for a brain wave stimulator using a light emitting diode as a surface light source close to the natural light. <P>SOLUTION: The high luminance light emitting diode of green, blue, and red type, or the light's three primary colors, is set as a light source and the light from the light source is made into the surface light source by a light guide plate 1 so that the device can be miniaturized and its weight is lighten. The plane shape of the light guide plate 1 is preferably square. The light emitting surface is provided with pits 2. The reflecting surface is treated by blast. The surface light emitting bodies can be worn on spectacle-shaped goggles. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明が属する技術分野】
本発明は目蓋に光を照射して光刺激をおこなう脳波刺激装置に関し、特に発光ダイオードを光源とし、自然光に近い面発光によって光刺激をおこなう脳波刺激装置に関する。
【0002】
【従来の技術】
一般に光を目蓋に照射する脳波刺激装置は、光源を有する眼鏡状のゴーグルを装着し、プログラムされた光の点滅によって、網膜に多彩な色の連続した抽象模様を残し、脳波を誘導しようとするものである。この光源に従来は白熱電球や赤色或いは緑色発光ダイオード、蛍光管等が用いられてきた。一般に脳波刺激装置の光源は面光源であることと自然光源であることが望ましい。
【0003】
光源に白熱電球を用いたものは発熱量が大きくまた寿命も短い。またプログラムに対する応答速度も低く面光源も自然光源に近いとはいえない。又、光源に発光ダイオードを用いたものについても熱や寿命は問題ないが輝度が低く、単色光で点光源という面で脳波刺激装置には不十分であった。さらに光源に蛍光管を用いたものは面光源であり輝度や色調も十分であるがガラス管のために形状が大きく重いという欠点があった。
【0004】
一方で、特開平10−211285号には有機エレクトロルミネッセンス素子(有機EL素子)を用いた光刺激装置及びこれを用いた脳波誘導装置について提案されており、面光源である光刺激装置が開示されている。
【0005】
【発明が解決しようとする課題】
白熱電球、蛍光管については上述したような問題があり、特開平10−211285号の有機EL素子を用いた光刺激装置については、ゴーグルの内側略全体に有機EL素子を接着配備するので高価であり、製造も容易ではない。さらにフルカラーにする場合にも製造が難しい。
【0006】
一方で、近年発光ダイオードの進歩は目覚しく、輝度も高く色調の面でも脳波刺激装置の光源に適した緑や青色のものが安価にできるようになってきた。このことが色の組合せを可能にし、脳波刺激装置の光源として使用することが可能となった。しかしこれらの高輝度発光ダイオードを従来のように点光源として、目蓋への直接照射では組合せによる色の混合ができず、また輝度が高いため極めて危険であるといえる。
【0007】
本願発明はこれらの課題を解決するためになされたものであり、発光ダイオードを光源とし、自然光に近い面発光によって光刺激をおこなう脳波刺激装置を提供することを目的とするものである。
【0008】
【課題を解決するための手段】
本発明は、光源と、導光板とを備えた面発光体であって、当該導光板は反射面と、発光面とを有し、光源からの光が導光板内を通り、反射面で反射して発光面を光らせる面発光体である。
【0009】
本発明の発光ダイオードは高輝度発光ダイオードであることが好ましく、発光ダイオードは導光板の反射面、発光面ではない端面に十分な輝度と色の混合が可能なように複数個配置されているのがよい。フルカラーにするには光源を3つ以上として、当該3つ以上の発光ダイオードは赤、緑、青系を含むものとする。
【0010】
上記反射面は光源からの光を反射して発光面に導く導光板の面であるが、この反射面は、くもりガラス状に処理(本発明では「ブラスト処理」とする)を施すことができ、反射面には反射板を取付けて反射面を覆うことができる。
【0011】
さらに上記導光板と、上記発光ダイオードとを基板に固定し、当該基板に発光ダイオードを一定の周期で発光させるための電気回路を設けて、当該電気回路に発光ダイオードを接続することができる。
【0012】
そして上記の本発明の面発光体を眼鏡状のゴーグルに装着して脳波刺激装置を形成することができる。
【0013】
【発明の実施の形態】
以下本発明の実施の形態について説明する。本発明の面発光体は、光源と、導光板とを備えている。光源は、光の三原色である緑、青、赤系の発光ダイオードを組合せたものにすることによってフルカラーで自然光に近い発光を実現することができる。発光ダイオードは高輝度、好ましくは輝度400mcd以上のものである。尚、本発明の面発光体は、導光板等を用いることでフルカラーの面発光体を得るものであるから、光源には有機EL素子を用いても本発明と同様の効果を得ることは可能である。
【0014】
導光板は反射面と、発光面とを有しており、導光板の反射面、発光面ではない端面に配置される光源からの光は、導光板の中を通って反射面で反射して発光面が光り、当該光が目蓋に照射されて脳波を刺激する。導光板及び発光ダイオードは基板に固定することができ、基板には発光ダイオードを一定の周期で発光することができるように電気回路を組込んで当該電気回路に発光ダイオードを接続することができる。導光板はガラスに近い透明率をもち硬度も高いアクリル樹脂がよいが、その他の樹脂やガラス等を用いてもよい。
【0015】
導光板の反射面にブラスト処理を施せば光源からの光が乱反射するので、光が混合されて発光面全体が均等に光る。さらに反射面に反射板を設けるならば、反射面から光の透過を防ぐことができて発光面から効率良く光が得られる。反射板とブラスト処理を組合せれば、面発光体は、ブラスト処理によって乱反射して反射面から透過した光をも反射板によって反射して発光面に導くことができるので光源から照射される光を効率良く導光板表面全体に導き面発光させることができる。
【0016】
本発明の面発光体を眼鏡状のゴーグルに着装することについては既存の方法でおこなうことができるが、本発明は光源を発光ダイオードにしたことに伴い、高輝度で小型軽量な脳波刺激装置を安価且つ容易に得ることができる。
【0017】
【実施例】
以下本発明の一実施例について図面を用いて説明する。図1は本発明の一実施例である面発光体を導光板1の発光面より見た平面図を示している。導光板1の平面形状は方形が望ましく、本実施例は長方形である。導光板1において発光面5の一方の短辺側(図中右側)の面には発光ダイオード3の位置を固定するためのピット2が複数個設けられており、ここより発光ダイオード3の光が導光板1の中に入る。ピット2は取付けられる発光ダイオードの個数と同数設けられる。尚、本実施例では発光ダイオード3を3個使用しており、それぞれ緑、青、赤系である。複数の発光ダイオードの配列については特に限定されない。導光板1と発光ダイオード3は基板4に固定されている。
【0018】
図2は図1の面発光体を側面からみた側面図を示している。図示されるように導光板1の側面は、発光ダイオード3の取付けられている面側の辺が下底となるような略台形状である。又、発光ダイオード3の取付けられている面と、発光面5とは互いに対して90度の角度をなしている。さらに、導光板1の底面は発光ダイオード3の取付けられている面からその向合う面に向かって傾斜している。この形状によって発光ダイオードからの光が反射面で反射して発光面5が光るようになっている。底面全体は反射面であってブラスト処理がなされており(ブラスト処理された反射面を符号6で示しており、以下「ブラスト処理面6」とする)、さらに反射板7で覆われている。発光ダイオード3からの入射光はブラスト処理面6で散乱し、一部の光は直接発光面5へ反射し、一部の光は反射板7で反射して発光面5を光らせる。
【0019】
【発明の効果】
本発明により、発光ダイオードを用いた安価で製造容易な面発光体が得られる。又、本発明は光の三原色である緑、青、赤系の高輝度発光ダイオードを光源にすることにより、フルカラーの自然光に近い光を得ることができる。さらに導光板を用い反射面にブラスト処理を施すことにより、光が混合された状態で発光面全体が光る面発光が得られる。反射板は特に反射面にブラスト処理を施した時に反射光を効率良く反射面に導くことができる。
【0020】
本発明においては発光ダイオードを用いるので小型軽量化が可能な面発光体及び脳波刺激装置を安価且つ容易に得ることができる。
【図面の簡単な説明】
【図1】本発明の面発光体における一実施例の正面図。
【図2】図1の実施例を側面から見た側面図。
【符号の説明】
1  導光板
2  ピット
3  発光ダイオード
4  基板
5  発光面
6  ブラスト処理面
7  反射板
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electroencephalogram stimulator that irradiates the eye lid with light to perform photostimulation, and more particularly to an electroencephalogram stimulator that uses a light emitting diode as a light source and performs photostimulation by surface light emission close to natural light.
[0002]
[Prior art]
In general, an electroencephalogram stimulator that irradiates light to the eyelid wears eyeglass-shaped goggles with a light source, and attempts to induce brain waves by leaving a continuous abstract pattern of various colors on the retina by blinking programmed light. Is what you do. Conventionally, incandescent lamps, red or green light emitting diodes, fluorescent tubes, and the like have been used as the light source. Generally, it is desirable that the light source of the electroencephalogram stimulator be a surface light source and a natural light source.
[0003]
A light source using an incandescent light bulb generates a large amount of heat and has a short life. Also, the response speed to the program is low, and the surface light source cannot be said to be close to a natural light source. Also, the light source using a light emitting diode as a light source has no problem with heat and life, but has a low luminance and is insufficient for an electroencephalogram stimulator in terms of a monochromatic light and a point light source. Further, the one using a fluorescent tube as the light source is a surface light source and has sufficient luminance and color tone, but has a drawback that the glass tube is large and heavy.
[0004]
On the other hand, Japanese Patent Application Laid-Open No. H10-212285 proposes a photostimulation device using an organic electroluminescence device (organic EL device) and an electroencephalogram induction device using the same, and discloses a photostimulation device as a surface light source. ing.
[0005]
[Problems to be solved by the invention]
The incandescent lamp and the fluorescent tube have the above-mentioned problems, and the photostimulator using the organic EL element disclosed in Japanese Patent Application Laid-Open No. 10-212285 is expensive because the organic EL element is adhered and provided almost entirely inside the goggles. Yes, it is not easy to manufacture. Further, it is difficult to manufacture even in full color.
[0006]
On the other hand, in recent years, the progress of light-emitting diodes has been remarkable, and green and blue light sources suitable for the light source of the electroencephalogram stimulator can be manufactured at a low cost in terms of high luminance and color tone. This has enabled the combination of colors and has made it possible to use it as a light source of an electroencephalogram stimulator. However, if these high-brightness light emitting diodes are used as a point light source as in the related art, direct irradiation on the eyelid cannot mix colors by combination, and the brightness is high, which is extremely dangerous.
[0007]
The present invention has been made to solve these problems, and an object of the present invention is to provide an electroencephalogram stimulator that uses a light emitting diode as a light source and performs light stimulation by surface light emission close to natural light.
[0008]
[Means for Solving the Problems]
The present invention is a surface light emitter including a light source and a light guide plate, wherein the light guide plate has a reflective surface and a light emitting surface, and light from the light source passes through the light guide plate and is reflected by the reflective surface. It is a surface light emitter that emits light from the light emitting surface.
[0009]
The light-emitting diode of the present invention is preferably a high-brightness light-emitting diode, and a plurality of light-emitting diodes are arranged on the reflection surface of the light guide plate and on the end surface that is not the light-emitting surface so that sufficient luminance and color can be mixed. Is good. To achieve full color, three or more light sources are used, and the three or more light emitting diodes include red, green, and blue light.
[0010]
The reflecting surface is a surface of a light guide plate that reflects light from a light source and guides the light to a light emitting surface. The reflecting surface can be processed into a frosted glass shape (referred to as “blast processing” in the present invention). A reflection plate can be attached to the reflection surface to cover the reflection surface.
[0011]
Further, the light guide plate and the light emitting diode can be fixed to a substrate, and an electric circuit for causing the light emitting diode to emit light at a predetermined period is provided on the substrate, and the light emitting diode can be connected to the electric circuit.
[0012]
Then, the above-mentioned surface light-emitting body of the present invention can be attached to eyeglass-like goggles to form an electroencephalogram stimulator.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. The surface light emitter of the present invention includes a light source and a light guide plate. The light source can realize full-color light emission close to natural light by combining light emitting diodes of three primary colors of light, green, blue and red. The light emitting diode has a high luminance, preferably a luminance of 400 mcd or more. In addition, since the surface light emitter of the present invention obtains a full-color surface light emitter by using a light guide plate or the like, the same effect as that of the present invention can be obtained even if an organic EL element is used as a light source. It is.
[0014]
The light guide plate has a reflective surface and a light emitting surface, and light from a light source disposed on the reflective surface of the light guide plate, which is not the light emitting surface, passes through the light guide plate and is reflected by the reflective surface. The light emitting surface illuminates, and the light irradiates the eye lid to stimulate brain waves. The light guide plate and the light emitting diode can be fixed to a substrate, and an electric circuit can be incorporated in the substrate so that the light emitting diode can emit light at a constant cycle, and the light emitting diode can be connected to the electric circuit. The light guide plate is preferably an acrylic resin having a transparency close to that of glass and a high hardness, but other resins, glass, or the like may be used.
[0015]
If the blast process is performed on the reflection surface of the light guide plate, light from the light source is irregularly reflected, so that the light is mixed and the entire light emission surface shines uniformly. Further, if a reflection plate is provided on the reflection surface, transmission of light from the reflection surface can be prevented, and light can be efficiently obtained from the light-emitting surface. If the reflector and the blasting process are combined, the surface illuminator can diffuse the light scattered by the blasting process and also transmit the light from the reflecting surface by the reflector and guide it to the light emitting surface. Guide light can be efficiently emitted to the entire surface of the light guide plate.
[0016]
The wearing of the surface light-emitting body of the present invention on eyeglass-like goggles can be performed by an existing method.However, the present invention provides a high-intensity, small-sized and light-weight brain wave stimulator with the light source being a light-emitting diode. It can be obtained inexpensively and easily.
[0017]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a surface light-emitting body according to one embodiment of the present invention as viewed from a light-emitting surface of a light guide plate 1. The planar shape of the light guide plate 1 is desirably a square, and the present embodiment is a rectangle. A plurality of pits 2 for fixing the position of the light-emitting diode 3 are provided on one short side (right side in the drawing) of the light-emitting surface 5 of the light guide plate 1, from which light of the light-emitting diode 3 is transmitted. The light enters the light guide plate 1. The pits 2 are provided in the same number as the number of light emitting diodes to be mounted. In this embodiment, three light emitting diodes 3 are used, which are respectively green, blue and red. The arrangement of the plurality of light emitting diodes is not particularly limited. The light guide plate 1 and the light emitting diode 3 are fixed to a substrate 4.
[0018]
FIG. 2 shows a side view of the surface light emitter of FIG. 1 as viewed from the side. As shown in the figure, the side surface of the light guide plate 1 has a substantially trapezoidal shape such that the side on the side where the light emitting diode 3 is attached is the lower bottom. The surface on which the light emitting diode 3 is mounted and the light emitting surface 5 form an angle of 90 degrees with each other. Further, the bottom surface of the light guide plate 1 is inclined from the surface on which the light emitting diodes 3 are mounted to the surface facing the light emitting diode 3. With this shape, light from the light emitting diode is reflected on the reflecting surface, and the light emitting surface 5 shines. The entire bottom surface is a reflective surface and has been blasted (the blasted reflective surface is indicated by reference numeral 6 and is hereinafter referred to as “blasted surface 6”), and is further covered with a reflective plate 7. The incident light from the light emitting diode 3 is scattered by the blasting surface 6, a part of the light is directly reflected to the light emitting surface 5, and a part of the light is reflected by the reflector 7 to make the light emitting surface 5 shine.
[0019]
【The invention's effect】
According to the present invention, an inexpensive and easily manufactured surface light-emitting body using a light-emitting diode can be obtained. Further, in the present invention, light close to full-color natural light can be obtained by using high-luminance light emitting diodes of green, blue and red, which are the three primary colors of light, as light sources. Further, by performing blast processing on the reflecting surface using the light guide plate, surface light emission in which the entire light emitting surface shines in a state where light is mixed is obtained. The reflecting plate can efficiently guide the reflected light to the reflecting surface particularly when the blast processing is performed on the reflecting surface.
[0020]
In the present invention, since a light emitting diode is used, a surface light emitting body and an electroencephalogram stimulator which can be reduced in size and weight can be obtained at low cost and easily.
[Brief description of the drawings]
FIG. 1 is a front view of one embodiment of a surface light emitter of the present invention.
FIG. 2 is a side view of the embodiment of FIG. 1 as viewed from the side.
[Explanation of symbols]
Reference Signs List 1 light guide plate 2 pit 3 light emitting diode 4 substrate 5 light emitting surface 6 blasting surface 7 reflector

Claims (6)

光源と、導光板とを備えた面発光体であって、前記導光板は反射面と、発光面とを有し、前記光源からの光が前記導光板内を通り、前記反射面で反射して発光面を発光させることを特徴とした面発光体。A light source and a surface light emitter including a light guide plate, wherein the light guide plate has a reflective surface and a light emitting surface, and light from the light source passes through the light guide plate and is reflected by the reflective surface. A surface light-emitting body characterized in that a light-emitting surface is made to emit light. 前記光源は発光ダイオードであり、赤、緑、青系を含んで3つ以上ある請求項1に記載の面発光体。The surface light emitting device according to claim 1, wherein the light source is a light emitting diode, and there are three or more light sources including red, green, and blue. 前記導光板の前記反射面にはブラスト処理が施されている請求項1又は2に記載の面発光体。The surface light emitter according to claim 1, wherein a blast process is performed on the reflection surface of the light guide plate. 前記導光板の前記反射面には反射板が取付けられている請求項1乃至3のいずれかに記載の面発光体。The surface light emitter according to claim 1, wherein a reflection plate is attached to the reflection surface of the light guide plate. 請求項1乃至4のいずれかに記載の面発光体において、前記導光板と、前記発光ダイオードとが基板に固定され、前記基板には前記発光ダイオードを一定の周期で発光させるための電気回路があり、当該電気回路に前記発光ダイオードが接続されている面発光体。5. The surface light emitter according to claim 1, wherein the light guide plate and the light emitting diode are fixed to a substrate, and the substrate has an electric circuit for causing the light emitting diode to emit light at a constant cycle. 6. And a surface light emitter in which the light emitting diode is connected to the electric circuit. 請求項5に記載の面発光体を眼鏡状のゴーグルに装着したことを特徴とする脳波刺激装置。An electroencephalogram stimulation device comprising the surface light-emitting body according to claim 5 mounted on eyeglass-like goggles.
JP2002202247A 2002-07-11 2002-07-11 Surface light emitting body and brain wave stimulator using the same Pending JP2004041399A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10112057B2 (en) 2013-07-23 2018-10-30 Koninklijke Philips N.V. Non-ocular photo-biological stimulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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