JP4841513B2 - Lighting device - Google Patents

Lighting device Download PDF

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JP4841513B2
JP4841513B2 JP2007190009A JP2007190009A JP4841513B2 JP 4841513 B2 JP4841513 B2 JP 4841513B2 JP 2007190009 A JP2007190009 A JP 2007190009A JP 2007190009 A JP2007190009 A JP 2007190009A JP 4841513 B2 JP4841513 B2 JP 4841513B2
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light
light guide
guide member
incident
curved surface
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JP2009026660A (en
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信也 境田
浩和 中川
昌史 山本
雅昭 花野
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Sharp Corp
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Sharp Corp
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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
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Description

本発明は光源からの光を入射部から入射し導光して出射部から光を出射する導光部材を用いた照明装置に関し、例えば液晶ディスプレイのバックライト、街灯、家庭・工場等の照明器具に用いて好適な導光部材を用いた照明装置に関するものである。   The present invention relates to an illuminating device using a light guide member that receives light from an incident portion and guides light from an incident portion and emits light from an emission portion, for example, a backlight of a liquid crystal display, a street lamp, a lighting fixture for a home / factory, etc. It is related with the illuminating device using the light guide member suitable for using.

近年、LED(Light Emitting Diode)やCCFL(Cold Cathode Fluorescent Lamp)等の光源を利用した装置においては、光源からの光を均一にし、面的に照射するために導光板を利用したものが提案されている(例えば、特許文献1参照)。   In recent years, devices using light sources such as LEDs (Light Emitting Diodes) and CCFLs (Cold Cathode Fluorescent Lamps) have been proposed that use a light guide plate to make the light from the light sources uniform and to irradiate the surface. (For example, refer to Patent Document 1).

上記特許文献1には、図19に示すように、発光素子Aから第1の入光面B1に導光される光束を発光面B2に指向させるための臨界角を有した反射面Cと、該反射面Cで反射された光束を出光する出光面Dと、該出光面Dから出光された光束を導光する第2の入光面Fからとから形成される少なくとも1つの形状部B3を設けてなる導光板Bを備えてなる面発光装置が記載されている。
特開2002−222605号公報
In Patent Document 1, as shown in FIG. 19, a reflecting surface C having a critical angle for directing a light beam guided from the light emitting element A to the first light incident surface B1 toward the light emitting surface B2, At least one shape part B3 formed from a light exit surface D that emits the light beam reflected by the reflection surface C and a second light incident surface F that guides the light beam emitted from the light exit surface D is provided. A surface light emitting device including a light guide plate B provided is described.
JP 2002-222605 A

しかしながら、特許文献1に記載されている面発光装置の導光板(導光部材)Bにおいては、形状部B3は発光素子Aからの光を導光部材B内に導光する機能を有するのみで、形状部B3からは出光させることができず、従って、形状部B3を含む面全体、即ち形状部B3と出射面B2とで発光させることができなかった。故に、所望の大きさの発光面を得るためには、形状部B3を除いた大きさで発光面を構成しなければならず、必然的に装置全体が大型化するという課題があった。   However, in the light guide plate (light guide member) B of the surface light emitting device described in Patent Document 1, the shape portion B3 only has a function of guiding light from the light emitting element A into the light guide member B. Therefore, light could not be emitted from the shape portion B3, and therefore, the entire surface including the shape portion B3, that is, the shape portion B3 and the emission surface B2 could not emit light. Therefore, in order to obtain a light emitting surface of a desired size, the light emitting surface must be configured with a size excluding the shape portion B3, which inevitably increases the size of the entire apparatus.

本発明は上記のような課題を解決するためになされたもので、成形部(従来の形状部に相当する部分)においても光を出射可能に形成し、出射方向の面全体で出射可能とした照明装置を提供することを目的とするものである。   The present invention has been made in order to solve the above-described problems, and is formed so that light can be emitted even in a molded portion (a portion corresponding to a conventional shape portion), and can be emitted over the entire surface in the emission direction. The object is to provide a lighting device.

本発明の照明装置は、光源と、該光源からの光を入射部から導光して全反射させるとともに、その全反射させた光をさらに反射面にて反射させて出射する成形部を備えた導光部材と、上記光源及び導光部材を収納する筐体とからなることを特徴とする。   The illuminating device of the present invention includes a light source and a molding unit that guides the light from the light source from the incident part and totally reflects the light, and further reflects the totally reflected light on a reflection surface and emits the light. It consists of a light guide member and a housing for housing the light source and the light guide member.

本発明の照明装置にあっては、所望の大きさの発光面(出射部)を得るために部材(装置)全体の大型化を必要とせず、光を出射方向の面全体で出射可能とした照明装置を実現できる。   In the illuminating device of the present invention, it is not necessary to increase the size of the entire member (device) in order to obtain a light emitting surface (emitter) having a desired size, and light can be emitted over the entire surface in the emission direction. A lighting device can be realized.

本発明の照明装置によれば、導光部材の成形部は光を出射できるため、出射光を出射方向の面全体で出射可能な導光部材を実現でき、よって、所望の大きさの発光面(出射部)を得るために部材(装置)全体の大型化を必要とせず、照明装置の小型化が容易に図ることができる。   According to the illumination device of the present invention, since the molded portion of the light guide member can emit light, a light guide member capable of emitting the emitted light over the entire surface in the emission direction can be realized, and thus a light emitting surface of a desired size It is not necessary to increase the size of the entire member (device) in order to obtain (the emitting portion), and the lighting device can be easily reduced in size.

(実施の形態1)
以下、本発明の照明装置の実施の形態について、現状の各種の直管蛍光灯用の灯具に使用可能な細長型の照明装置に実施した場合について、図1から図9を用いて説明する。
なお、上記直管蛍光灯用の灯具とは、直管蛍光灯用ランプ、つまり、直管蛍光灯放電管を取り付けてなる蛍光灯器具である。
(Embodiment 1)
Hereinafter, embodiments of the illumination device according to the present invention will be described with reference to FIGS. 1 to 9 in a case where the illumination device is implemented in an elongated illumination device that can be used for various types of lamps for straight tube fluorescent lamps.
The lamp for the straight tube fluorescent lamp is a lamp for a straight tube fluorescent lamp, that is, a fluorescent lamp fixture to which a straight tube fluorescent lamp discharge tube is attached.

本発明の照明装置Xは、図1から図3に示すように、導光部材1の導光部材本体10の入射部11に当接すべく配置してなる複数のLEDチップ21を細長いLED基板22に所定の間隔を置いて装着することで光源2を形成し、該光源2に電源を供給する電源回路及び該電源回路を制御する制御回路にて回路部7を形成し、該回路部7・上記光源2・上記導光部材1を収容する収容部53を、放熱性の高いアルミニウムよりなる筐体5に形成し、該筐体5の収容部53に上記回路部7・光源2・導光部材1を収容し、該筐体5の収容部53の開口面を閉塞するべく上記導光部材1より出射された光を拡散させる拡散板(拡散部)6を着脱可能に装着し、上記筐体5及び拡散部6の長手方向yの両端に上記筐体5に上記拡散部6を装着する口金91、92を着脱可能に装着し、該口金91、92に現状の直管蛍光灯用の灯具のソケット(図示せず)に装着可能な一対の装着ピン91a、91b及び92a、92bを夫々設けて構成されるものである。   As shown in FIGS. 1 to 3, the illumination device X of the present invention includes a plurality of LED chips 21 arranged to be in contact with the incident portion 11 of the light guide member main body 10 of the light guide member 1 as an elongated LED substrate. The light source 2 is formed by attaching the light source 2 to the light source 22 at a predetermined interval, and the circuit unit 7 is formed by a power supply circuit that supplies power to the light source 2 and a control circuit that controls the power supply circuit. The housing portion 53 that houses the light source 2 and the light guide member 1 is formed in the housing 5 made of aluminum having high heat dissipation, and the circuit portion 7, the light source 2, and the light guide are formed in the housing portion 53 of the housing 5. A diffusing plate (diffusion part) 6 for diffusing the light emitted from the light guide member 1 is detachably mounted so as to accommodate the optical member 1 and close the opening surface of the accommodating part 53 of the housing 5. Ports for mounting the diffusing unit 6 on the casing 5 at both ends of the casing 5 and the diffusing unit 6 in the longitudinal direction y 91 and 92 are detachably mounted, and a pair of mounting pins 91a and 91b and 92a and 92b that can be mounted on a socket (not shown) of a lamp for a current straight tube fluorescent lamp are provided on the caps 91 and 92, respectively. Configured.

なお、上記一対の装着ピン91a、91b及び92a、92bは、灯具のソケットに装着することにより商用電源を上記回路部7に供給するとともに、照明装置X自体を灯具に装着するものである。   The pair of mounting pins 91a, 91b and 92a, 92b are used to supply commercial power to the circuit unit 7 by mounting on the socket of the lamp, and to mount the lighting device X itself to the lamp.

上記構成において、本発明の照明装置に用いる導光部材1は、図4及び図5に示すように、アクリル、ポリカーボネイト、エポキシ、シクロオレフィン等の透明若しくは半透明の樹脂材料からなる導光部材本体10に光源2からの光を入射する入射部11を設け、該入射部11から入射した光を導光して全反射させるとともに、その全反射させた光をさらに反射面である反射部としての第1反射部13及び/若しくは第2反射部14にて反射させて該反射部にて反射させた光を出射する成形部としての曲面部12aを設け、さらに、該曲面部12aにて全反射させた光を上記第1反射部13及び/若しくは上記第2反射部14により反射させて出射させる平面部12bを設け、該曲面部12a及び平面部12bにて出射面である出射部12を設けて構成するものである。   In the above configuration, the light guide member 1 used in the lighting device of the present invention is a light guide member body made of a transparent or translucent resin material such as acrylic, polycarbonate, epoxy, or cycloolefin, as shown in FIGS. 10 is provided with an incident portion 11 for incident light from the light source 2, and the light incident from the incident portion 11 is guided and totally reflected, and the totally reflected light is further reflected as a reflecting portion as a reflecting surface. A curved surface portion 12a is provided as a molded portion that emits the light reflected by the first reflecting portion 13 and / or the second reflecting portion 14 and reflected by the reflecting portion, and is further totally reflected by the curved surface portion 12a. A flat surface portion 12b that reflects the emitted light by the first reflecting portion 13 and / or the second reflecting portion 14 and emits the light is provided, and the emitting portion 12 that is an emission surface is formed by the curved surface portion 12a and the flat surface portion 12b. Only to those that you want to configure.

なお、上記の場合、第1反射部13は、厚さ方向zに対して傾斜を有さない状態(垂直の状態)を示し、以下このような状態の第1反射部13を符号13aで示し、又、第2反射部14は、幅方向(短手方向)xに対して傾斜を有する状態を示し、以下このような状態の第2反射部14を符号14bで示す。   In the above case, the first reflecting portion 13 shows a state (vertical state) that is not inclined with respect to the thickness direction z, and hereinafter, the first reflecting portion 13 in such a state is indicated by reference numeral 13a. In addition, the second reflecting portion 14 shows a state having an inclination with respect to the width direction (short direction) x, and hereinafter, the second reflecting portion 14 in such a state is denoted by reference numeral 14b.

さらに、上記構成において、上記導光部材1は、第1反射部13aに反射板130が、又、第2反射部14bに反射板140が、夫々別体で設けられてなるものである。
又、上記光源2は、複数個のLEDチップ21を有し、該複数個のLEDチップ21を細長状のLED基板22上に所定の間隔をおいて一列に配設して構成してなり、上記導光部材1の入射部11に当接すべく配置してなるものである。
Further, in the above-described configuration, the light guide member 1 is configured such that the first reflecting portion 13a is provided with the reflecting plate 130, and the second reflecting portion 14b is provided with the reflecting plate 140 separately.
The light source 2 includes a plurality of LED chips 21, and the plurality of LED chips 21 are arranged in a line at a predetermined interval on an elongated LED substrate 22, The light guide member 1 is disposed so as to come into contact with the incident portion 11.

さらに、上記筐体5は、アルミニウム等の熱伝導性(放熱性)の高い金属にて、断面U字形の樋形状に形成するものであり、該筐体5の一方の側壁(光源側筐体側壁)51の内壁には、もう一つの反射部である第1外部反射部(外部反射体)510が垂直方向(厚さ方向y)に設けられるとともに、第2外部反射部511が水平方向(幅方向x)に設けられている。
なお、上記導光部材1は上記筐体5に設けられた係止機構(図示せず)により安定的に装着されている。
Further, the casing 5 is made of a metal having high thermal conductivity (heat dissipation) such as aluminum and has a U-shaped cross section, and has one side wall (light source side casing). On the inner wall of the side wall 51, a first external reflection part (external reflector) 510, which is another reflection part, is provided in the vertical direction (thickness direction y), and the second external reflection part 511 is provided in the horizontal direction ( It is provided in the width direction x).
The light guide member 1 is stably mounted by a locking mechanism (not shown) provided in the housing 5.

さらに、上記筐体5の底壁52内側には段差が設けられており、一方の段521には、上記LEDチップ21及び上記LED基板22からなる上記光源2が複数個、上記筐体5の一端の長手方向yに沿って上記導光部材1の入射部11に当接するように、熱伝導シート52bを介して設けられている。なお、該熱伝導シート52bは上記LEDチップ21からの熱を上記筐体5へ効率良く伝導するものである。   Further, a step is provided inside the bottom wall 52 of the housing 5. A plurality of the light sources 2 including the LED chip 21 and the LED substrate 22 are provided on one step 521, It is provided via the heat conductive sheet 52b so that it may contact | abut to the incident part 11 of the said light guide member 1 along the longitudinal direction y of one end. The heat conductive sheet 52b efficiently conducts heat from the LED chip 21 to the housing 5.

又、他方の段522には、上記光源2を駆動するための駆動回路7a・制御回路等を有する回路基板7bを備えた上記回路部7が、該回路部7からの熱を上記筐体5へ効率良く伝導する熱伝導シート52cを介して設けられている。   In the other stage 522, the circuit unit 7 including a circuit board 7 b having a drive circuit 7 a and a control circuit for driving the light source 2, the heat from the circuit unit 7 is transferred to the housing 5. It is provided via a heat conductive sheet 52c that conducts efficiently.

なお、上記第1外部反射部510は、上記導光部材1より出射された光若しくは第2外部反射部511にて反射された光を、上記拡散部6若しくは導光部材1内部へと反射させるべく設けられたものであり、例えばアルミニウム、銀等の反射機能を有する金属板からなるものである。   The first external reflector 510 reflects the light emitted from the light guide member 1 or the light reflected by the second external reflector 511 into the diffuser 6 or the light guide member 1. For example, it is made of a metal plate having a reflecting function such as aluminum or silver.

又、上記第2外部反射部511は、上記導光部材1より出射された光若しくは第1外部反射部510にて反射された光を、上記拡散部6若しくは第1外部反射部510又は導光部材1内部へと反射させるべく設けられたものであり、上記第1外部反射部510と同様に、例えばアルミニウム、銀等の反射機能を有する金属板からなるものである。   The second external reflection unit 511 transmits the light emitted from the light guide member 1 or the light reflected by the first external reflection unit 510 to the diffusion unit 6 or the first external reflection unit 510 or the light guide. Similar to the first external reflection portion 510, the member 1 is made of a metal plate having a reflection function, such as aluminum or silver.

さらに、上記拡散部6は透明若しくは半透明の樹脂材料からなる板状部材で、上記筐体5に着脱自在に装着されてなるものであり、又、上記筐体5と上記拡散部6にて形成される収容部53に、上記導光部材1、上記光源2等を収容してなるものである。
次に、上記導光部材1の構成について図4及び図5を用いて詳しく述べる。
上記導光部材1の入射部11は、上記導光部材本体10の一面(底面)10aの一端側10bで長手方向yに細長状に設けてなり、上記光源2の細長状のLED基板22上に所定の間隔をおいて一列に配設してなる複数個のLEDチップ21を当接すべく構成してなるものである。
Further, the diffusion part 6 is a plate-like member made of a transparent or translucent resin material, and is detachably attached to the casing 5. The light guide member 1, the light source 2, and the like are accommodated in the formed accommodation portion 53.
Next, the configuration of the light guide member 1 will be described in detail with reference to FIGS. 4 and 5.
The incident portion 11 of the light guide member 1 is provided in an elongated shape in the longitudinal direction y on one end side 10b of one surface (bottom surface) 10a of the light guide member main body 10, and on the elongated LED substrate 22 of the light source 2. A plurality of LED chips 21 arranged in a row at predetermined intervals are configured to contact each other.

そして、上記出射部12は、上記入射部11から上記導光部材本体10内部に導光された光を全反射させるための形状を有する成形部である曲面部12a及び該曲面部12aに延在してなる平面部12bにて構成するものである。   The emitting portion 12 extends to the curved surface portion 12a and the curved surface portion 12a, which is a molded portion having a shape for totally reflecting the light guided from the incident portion 11 into the light guide member body 10. The flat portion 12b is configured as described above.

そして又、上記曲面部12aは、上記導光部材本体10の一方の側面(光源側側面)15に位置し、上記入射部11と上記平面部12bとを連接(接続)するように設けられ、さらに、上記曲面部12a(曲面部12aの曲面)は、上記入射部11から上記導光部材本体10内部に導光され、上記曲面部12aに入射する光に対し、入射角が全反射を起こす臨界角を超えるように設けられ、該曲面部12aにて、上記入射部11から上記導光部材本体10内部に導光されて入射した光が全反射するとともに、上記入射部11以外の方向からの光については、入射角が臨界角を超えない光が含まれるため、入射角が臨界角を超えない光は該曲面部12にても上記導光部材本体10の外に出射する構成にしてなるものである。   The curved surface portion 12a is located on one side surface (light source side surface) 15 of the light guide member body 10, and is provided so as to connect (connect) the incident portion 11 and the planar portion 12b. Further, the curved surface portion 12a (the curved surface of the curved surface portion 12a) is guided from the incident portion 11 into the light guide member body 10, and the incident angle causes total reflection with respect to the light incident on the curved surface portion 12a. The light is incident on the curved surface portion 12a so as to be totally reflected from the incident portion 11 into the light guide member body 10, and from a direction other than the incident portion 11. Since the light whose incident angle does not exceed the critical angle is included, the light whose incident angle does not exceed the critical angle is configured to be emitted outside the light guide member body 10 even in the curved surface portion 12. It will be.

又、上記第1反射部13aは、上記入射部11に対して遠い側(入射部11と上記平面部12bとの連接側とは反対側)の側面に設けられ、上記導光部材本体10内を導光された光を上記導光部材本体10内部に反射するための反射機能、特に、上記曲面部12aによって全反射した光を上記曲面部12a及び平面部12bよりなる出射部12へと反射させる機能を有している。   The first reflecting portion 13a is provided on a side surface on the side far from the incident portion 11 (on the side opposite to the connection side between the incident portion 11 and the planar portion 12b). Reflection function for reflecting the light guided to the inside of the light guide member main body 10, in particular, the light totally reflected by the curved surface portion 12 a is reflected to the emitting portion 12 composed of the curved surface portion 12 a and the flat surface portion 12 b. It has a function to make it.

そして、上記第2反射部14bは、上記出射部12と対向する位置で、上記入射部11と上記第1反射部13aに隣接して設けられ、該第1反射部13aと同様に、上記曲面部12aによって全反射した光を上記曲面部12a及び平面部12bよりなる出射部12へと反射させる機能を有している。さらに、上記第2反射部14bは光源2に近づくにつれ導光部材本体10の幅方向xでの厚さzが暫時増すように傾斜が設けられている。この場合、上記曲面部12aの方向へ反射される光を増加させる効果を持たせることができる。   The second reflecting portion 14b is provided adjacent to the incident portion 11 and the first reflecting portion 13a at a position facing the emitting portion 12, and the curved surface is similar to the first reflecting portion 13a. It has a function of reflecting the light totally reflected by the portion 12a to the emitting portion 12 composed of the curved surface portion 12a and the flat surface portion 12b. Further, the second reflecting portion 14b is provided with an inclination so that the thickness z in the width direction x of the light guide member body 10 increases for a while as the light source 2 is approached. In this case, the effect of increasing the light reflected in the direction of the curved surface portion 12a can be provided.

次に、上記導光部材1の大きさについて、図4に記載の符号aから符号fを用いて説明する。
なお、符号aは上記入射部11と第2反射部14bとの交点を示し、符号bは上記入射部11と曲面部12aとの交点を示し、符号cは上記曲面部12aと平面部12bとの交点を示し、符号dは上記平面部12bと第1反射部13aとの交点を示し、符号eは上記第1反射部13aと第2反射部14bとの交点を示すものである。
Next, the magnitude | size of the said light guide member 1 is demonstrated using the code | symbol a to the code | symbol f described in FIG.
In addition, the code | symbol a shows the intersection of the said incident part 11 and the 2nd reflection part 14b, the code | symbol b shows the intersection of the said incident part 11 and the curved surface part 12a, and the code | symbol c shows the said curved surface part 12a and the plane part 12b. The symbol d indicates the intersection between the flat surface portion 12b and the first reflecting portion 13a, and the symbol e indicates the intersection between the first reflecting portion 13a and the second reflecting portion 14b.

又、符号fは、上記第1反射部13aの延長線hと上記入射部11の延長線iとの交点を示すものである。   The symbol f indicates the intersection of the extension line h of the first reflecting portion 13 a and the extension line i of the incident portion 11.

以上の符号aから符号fを用いて上記導光部材1の大きさを説明すると、上記導光部材1の大きさは、例えば、幅方向xの寸法(図4の符号bと符号fとの間の距離)が19mm、厚さ方向zの寸法(図4の符号dと符号fとの間の距離)が9mmであり、長手方向yの寸法が任意であり、又、導光部材1の入射部11の幅方向xの寸法(図4の符号aと符号bとの間の距離)は2mmとする。   The size of the light guide member 1 will be described using the above symbols a to f. For example, the size of the light guide member 1 is, for example, the dimension in the width direction x (between the symbols b and f in FIG. 4). The distance in the thickness direction z is 19 mm, the dimension in the longitudinal direction y is arbitrary, and the dimension in the longitudinal direction y is arbitrary. The dimension of the incident portion 11 in the width direction x (the distance between the reference symbol “a” and the reference symbol “b” in FIG. 4) is 2 mm.

さらに、第2反射部14に持たせた傾斜は、幅方向xの寸法(図4の符号aと符号fとの間の距離)が17mmである対して厚さ方向zの寸法(図4の符号eと符号fとの間の距離)を2.5mmとした傾斜角β(約8.4°)を有し、かつ、入射部11から離れるに従って導光部材1の厚さを減じるような傾斜であることとした。   Further, the inclination given to the second reflecting portion 14 is such that the dimension in the width direction x (distance between the symbol a and the symbol f in FIG. 4) is 17 mm, whereas the dimension in the thickness direction z (in FIG. 4). The inclination angle β (about 8.4 °) with the distance between the reference symbol e and the reference symbol f) being 2.5 mm, and the thickness of the light guide member 1 decreases as the distance from the incident portion 11 increases. It was decided to be inclined.

次に、上記のように構成してなる導光部材1における、光源2から出射された光が導光部材本体10の入射部11から、該導光部材本体10内部に導光され、出射部12より出射されるまでの導光動作について説明する。   Next, in the light guide member 1 configured as described above, the light emitted from the light source 2 is guided from the incident portion 11 of the light guide member main body 10 into the light guide member main body 10 to be emitted. The light guide operation until the light is emitted from 12 will be described.

まず、上記光源2より出射された光は、該光源2の当接する上記導光部材本体10の入射部11から入射され、該入射された光は屈折率の差によって屈折しながら上記導光部材本体10内部へと導光される。   First, the light emitted from the light source 2 is incident from the incident portion 11 of the light guide member body 10 with which the light source 2 abuts, and the incident light is refracted by a difference in refractive index while the light guide member. The light is guided into the main body 10.

そして、上記導光部材本体10内部に導光された光は、上記入射部11に対向する曲面部12aに向かい(進行し)、該曲面部12aにて導光された光が全反射され、その全反射された光がさらに上記第1反射部13a及び/若しくは第2反射部14bにて反射されて該反射された光が上記曲面部12aから出射されるとともに、上記平面部12bからも出射され、上記出射部12の全面から出射される。   The light guided to the inside of the light guide member main body 10 is directed (advanced) toward the curved surface portion 12a facing the incident portion 11, and the light guided by the curved surface portion 12a is totally reflected, The totally reflected light is further reflected by the first reflecting portion 13a and / or the second reflecting portion 14b, and the reflected light is emitted from the curved surface portion 12a and also emitted from the flat surface portion 12b. Then, the light is emitted from the entire surface of the emission part 12.

従って、出射光を出射方向w1に対する面全体で出射可能な導光部材若しくは該導光部材を用いた導光方法が実現でき、よって、所望の大きさの発光面を得るために部材全体の大型化を必要とせず、小型化を容易に図ることができる。   Therefore, a light guide member that can emit the emitted light over the entire surface in the emission direction w1 or a light guide method using the light guide member can be realized. Therefore, in order to obtain a light emitting surface of a desired size, the entire member is large. Therefore, it is possible to easily reduce the size.

次に、上記の場合の導光部材1の曲面部12aの形状、機能についてさらに詳細に説明する。
図6に示す通り、該曲面部12aは、上記入射部11から導光部材本体10内部に入射される全ての光に対して入射角が臨界角を超えるような曲面形状を有し、全ての光を全反射させる構成にしてなるものである。
Next, the shape and function of the curved surface portion 12a of the light guide member 1 in the above case will be described in more detail.
As shown in FIG. 6, the curved surface portion 12a has a curved surface shape such that the incident angle exceeds the critical angle with respect to all the light incident from the incident portion 11 into the light guide member main body 10, It is configured to totally reflect light.

なお、この臨界角についてもう少し詳細に説明すると、この際の臨界角とは、光が屈折率の異なる物質間を通過する時、特に屈折率の高い物質から屈折率の低い物質へ通過しようとする時、入射角がある一定の角度を超えると、屈折を起こさず全ての入射光が反射するようになる全反射という現象を引き起こす角度のことである。   This critical angle will be explained in more detail. The critical angle in this case means that when light passes between substances having different refractive indexes, it tries to pass from a substance having a high refractive index to a substance having a low refractive index. When the incident angle exceeds a certain angle, it is an angle that causes a phenomenon of total reflection in which all incident light is reflected without causing refraction.

一般に反射材や反射シートを用いた反射には、入射光と反射光とでエネルギーが失われる、いわゆる反射損失が生じるが、上記の全反射の場合はこの反射損失が無く、効率的に光の経路を変更することができるものである。   In general, reflection using a reflective material or a reflection sheet causes a so-called reflection loss in which energy is lost between incident light and reflected light. However, in the case of the total reflection described above, there is no such reflection loss, and light is efficiently reflected. The route can be changed.

本発明の照明装置の実施の形態1に用いる導光部材1において、上記曲面部12aの形状は、上記導光部材1を長手方向yに垂直な切断面で、等角螺旋により表される形状を有している。この際の等角螺旋は、原点をOとし、曲線上の任意の点をPとすると、点Pにおける曲線の接線と線分OPのなす角が常に等しくなるような特性を有する螺旋を描く曲線である。   In the light guide member 1 used in Embodiment 1 of the lighting device of the present invention, the shape of the curved surface portion 12a is a shape represented by an equiangular spiral with the light guide member 1 cut along a plane perpendicular to the longitudinal direction y. have. The equiangular spiral at this time is a curve that draws a spiral having a characteristic that the angle between the tangent of the curve at the point P and the line segment OP is always equal, where O is the origin and P is any point on the curve. It is.

従って、上記光源2のLEDチップ21から出射された光が全反射するための条件は、該LEDチップ21と、曲線上の任意の点とのなす角度が常に、全反射が起こる角度条件として最小の入射角度である臨界角と同じ、若しくは、全反射が起こる角度条件において可能な限り臨界角に近い角度となるように設計されることであり、この条件に合致させる最適な形状は、上述の特性を有する等角螺旋を用いた形状であり、この等角螺旋を用いた形状を採用することにより導光部材1を最も薄く形成することができる。   Accordingly, the condition for the total reflection of the light emitted from the LED chip 21 of the light source 2 is the minimum as the angle condition in which the angle between the LED chip 21 and an arbitrary point on the curve always causes the total reflection. It is designed to be as close to the critical angle as possible in the angle condition where the total reflection is the same as the critical angle, which is the incident angle, and the optimum shape to meet this condition is as described above. The light guide member 1 can be formed to be the thinnest by adopting the shape using the equiangular spiral having the characteristics.

なお、図6に示す曲面部12aの形状は模式的なものであり、正確には、下記の数式により決定される形状を有している。   Note that the shape of the curved surface portion 12a shown in FIG. 6 is a schematic shape, and more precisely, has a shape determined by the following mathematical formula.

ここで、上記等角螺旋についてさらに詳細に説明すると、該等角螺旋は、Cを定数、n0を導光部材1の屈折率とし、0<α≦π/2−sin-1(1/n0)を満たす一定の角度αを想定することによって、上記入射部の1点を原点として半径rおよび角度θによる極座標表示でr=exp(−θ/tanα+C)で表すことができる。 Here, the equiangular spiral will be described in more detail. The equiangular spiral has C as a constant, n 0 as a refractive index of the light guide member 1, and 0 <α ≦ π / 2−sin −1 (1 / Assuming a constant angle α satisfying (n 0 ), it can be expressed as r = exp (−θ / tan α + C) in polar coordinate display with a radius r and an angle θ with one point of the incident portion as the origin.

そして、この等角螺旋を用いた形状を採用した曲面部12aの断面形状は、図6に示すように、上記導光部材1の入射部11の1点を原点Oとして、極座標表示(r,θ)で
r=exp(−θ/tanα+C) ‥‥‥‥‥‥‥‥(1)
(1)式により表される形をしている。
And the cross-sectional shape of the curved surface part 12a which employ | adopted the shape using this equiangular spiral is, as shown in FIG. 6, one point of the entrance part 11 of the said light guide member 1 is made into the origin O, and polar coordinate display (r, θ) r = exp (−θ / tan α + C) (1)
(1) It has the form represented by Formula.

ここで、Cは定数であり、αは、上記導光部材1の屈折率をn0として、
α0=π/2−sin-1(1/n0) ‥‥‥‥‥‥‥‥‥(2)
0<α≦α0 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥(3)
となる任意の値である。ここで上記(2)式及び(3)式において、α0はαのとり得る最大値である。
Here, C is a constant, and α is the refractive index of the light guide member 1 is n 0 .
α 0 = π / 2−sin −1 (1 / n 0 ) (2)
0 <α ≦ α 0 ……………………………………………………………………………………………………………… (3)
Is an arbitrary value. Here, in the above equations (2) and (3), α 0 is the maximum value that α can take.

なお、上記(1)式において、C=0としたr=exp(−θ/tanα)は上記原点Oと上記曲面部12a上の任意の点Pを結ぶ直線と、該点Pでの接線とがなす角が常にαとなる関数である。   In the above equation (1), r = exp (−θ / tan α) where C = 0 is defined as a straight line connecting the origin O and an arbitrary point P on the curved surface portion 12a, and a tangent at the point P. Is a function whose angle is always α.

そして、上記導光部材1の臨界角をφとすると
φ=sin-1(1/n0) ‥‥‥‥‥‥‥‥‥‥‥‥‥(4)
であるので、(3)式は
0<α≦π/2−φ ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥(5)
となり、原点Oからの光は上記曲面部12aに臨界角以上の入射角で入射する、即ち、上記原点Oから入射した光は全て全反射するような曲面形状であることが分かる。
When the critical angle of the light guide member 1 is φ, φ = sin −1 (1 / n 0 ) (4)
Therefore, the expression (3) is 0 <α ≦ π / 2−φ (5)
Thus, it can be seen that the light from the origin O is incident on the curved surface portion 12a at an incident angle greater than the critical angle, that is, the light incident from the origin O is totally reflected.

なお、図6では曲面部12aはα≦θ≦π/2+αの範囲では(1)式に従った形状となっており、θ=αの点で平面部12bにつながり、θ=π/2+αの点で入射部11に垂直な面に接続されている。例えば、n0=1.49で、空気の屈折率を1とすると、臨界角φは約42°となる。 In FIG. 6, the curved surface portion 12a has a shape according to the formula (1) in the range of α ≦ θ ≦ π / 2 + α, and is connected to the flat surface portion 12b at the point of θ = α, and θ = π / 2 + α. The point is connected to a plane perpendicular to the incident part 11. For example, when n 0 = 1.49 and the refractive index of air is 1, the critical angle φ is about 42 °.

上記等角螺旋の原点Oは、上記光源2の発光領域の最も第2反射部14b側の端部11a、即ち、上記入射部11の上記第1反射部13a側の端部11aに設定されることが好ましい。該端部11aに設定することで、光源2から導光されて曲面部12aに入射する光の全てについて全反射条件を確保することができる。   The origin O of the equiangular spiral is set at the end 11a closest to the second reflecting portion 14b in the light emitting region of the light source 2, that is, the end 11a of the incident portion 11 on the first reflecting portion 13a side. It is preferable. By setting the end portion 11a, the total reflection condition can be ensured for all the light guided from the light source 2 and incident on the curved surface portion 12a.

さらに、上記曲面部12aは、断面形状の極座標表示におけるθがα≦θ≦π/2+αを満たす範囲にのみ存在することが好ましく、より詳しくは、上記導光部材1は上記入射部11に対し垂直な面を有し、上記曲面部12aは、断面形状の極座標表示におけるθがθ=π/2+αとなる位置で垂直な面に連なっていることが好ましい。   Furthermore, it is preferable that the curved surface portion 12a exists only in a range where θ in the polar coordinate display of the cross-sectional shape satisfies α ≦ θ ≦ π / 2 + α. More specifically, the light guide member 1 is located with respect to the incident portion 11. It is preferable that the curved surface portion 12a has a vertical surface and is continuous with the vertical surface at a position where θ in the polar coordinate display of the cross-sectional shape is θ = π / 2 + α.

又、上記曲面部12aは、断面形状の極座標表示におけるθがθ=αとなる位置で上記平面部12bに連なっていることが好ましく、このように形成することにより、上記導光部材1が無駄に凹凸のある形状になることを避け、上記曲面部12aから隣接する面へ滑らかに接続することができる。   Further, it is preferable that the curved surface portion 12a is continuous to the flat surface portion 12b at a position where θ in the polar coordinate display of the cross-sectional shape becomes θ = α. Therefore, it is possible to smoothly connect to the adjacent surface from the curved surface portion 12a.

上述のように曲面部12aを形成することにより、上記入射部11から入射された光が上記曲面部12aで全反射されて、上記第1反射部13a又は第2反射部14b、もしくは平面部12bへと向かう。この場合、入射された光が上記曲面部12aで全反射されるまでの光路で第1の光路31が形成される。   By forming the curved surface portion 12a as described above, the light incident from the incident portion 11 is totally reflected by the curved surface portion 12a, and the first reflecting portion 13a or the second reflecting portion 14b, or the flat surface portion 12b. Head to. In this case, the first optical path 31 is formed by the optical path until the incident light is totally reflected by the curved surface portion 12a.

なお、全反射された光のうち、上記平面部12bへ向かった光はその殆どが全反射条件を満たしているために上記平面部12bにて全反射され、上記第1反射部13a又は第2反射部14bへと向かう。   Of the totally reflected light, most of the light traveling toward the plane portion 12b satisfies the total reflection condition and is totally reflected by the plane portion 12b, so that the first reflecting portion 13a or the second reflecting portion is reflected. It heads for the reflection part 14b.

そして、上記第1反射部13aに入射した光及び第2反射部14bに入射した光の夫々は、上記第1反射部13a及び第2反射部14bにおいて反射され、上記導光部材本体10内部へと導光され、該導光された光は上記出射部12に向かう。該出射部12において臨界角φを下回る入射角で入射した光は上記導光部材1を屈折しながら出射され、上記曲面部12aが発光する。この場合、全反射された光がさらに反射され、出射部12より出射されるまでの光路で第2の光路32が形成される。   The light incident on the first reflecting portion 13a and the light incident on the second reflecting portion 14b are reflected by the first reflecting portion 13a and the second reflecting portion 14b, and enter the light guide member body 10. And the guided light travels toward the emitting portion 12. Light incident at an angle of incidence below the critical angle φ at the emitting portion 12 is emitted while being refracted by the light guide member 1, and the curved surface portion 12a emits light. In this case, the totally reflected light is further reflected, and the second optical path 32 is formed by the optical path until it is emitted from the emitting unit 12.

なお、上記出射部12において臨界角φを上回る入射角で入射した光は再び全反射され、導光部材本体1内部へ導光され、さらなる反射を経た後、上記出射部12に臨界角φを下回る入射角で再び入射すると、該出射部12より屈折しながら出射されることとなる。   In addition, light incident at an angle of incidence exceeding the critical angle φ in the emission part 12 is totally reflected again, guided to the inside of the light guide member main body 1, and after further reflection, the critical angle φ is given to the emission part 12. When the light is incident again at a lower incident angle, the light is emitted while being refracted from the light emitting portion 12.

次に、上記導光部材1内部において、上記入射部11にて導光された光がどのような光路を辿るか、図7を用いて説明する。なお、図5においては、光路M(破線)及び光路N(一点鎖線)の2種類の代表的な光路が記されている。   Next, it will be described with reference to FIG. 7 what optical path the light guided by the incident portion 11 follows in the light guide member 1. In FIG. 5, two types of typical optical paths, an optical path M (broken line) and an optical path N (one-dot chain line) are shown.

まず、上記光路Mにおいては、上記入射部11より入射した光は、上記曲面部12aに向かう(図7の符号M1で示す光路)と、上記曲面部12aは上述の通り、上記入射部11からの光が全反射されるように設計されているので、上記曲面部12aで全反射され、該全反射された光は上記第2反射部14bへと向かい(図7の符号Mで示す光路)、該第2反射部14bにて反射された後に上記第1反射部13aに向かい(図7の符号M3で示す光路)、該第1反射部13aにて反射され、該第1反射部13aにて反射された後に、上記平面部12bへと向かう(図7の符号M4で示す光路)。   First, in the optical path M, when the light incident from the incident part 11 goes to the curved surface part 12a (the optical path indicated by reference numeral M1 in FIG. 7), the curved surface part 12a is from the incident part 11 as described above. Is totally reflected by the curved surface portion 12a, and the totally reflected light is directed to the second reflecting portion 14b (an optical path indicated by symbol M in FIG. 7). Then, after being reflected by the second reflecting portion 14b, it goes to the first reflecting portion 13a (the optical path indicated by reference numeral M3 in FIG. 7), is reflected by the first reflecting portion 13a, and is reflected by the first reflecting portion 13a. Then, the light travels toward the plane portion 12b (the optical path indicated by reference numeral M4 in FIG. 7).

この場合、該平面部12bに向かう光は、入射角が全反射条件を満たしている(臨界角を上回っている)ため、上記導光部材1内へと全反射されて、上記入射部11へ向かう(図7の符号M5で示す光路)。   In this case, the light traveling toward the flat surface portion 12b is totally reflected into the light guide member 1 and incident on the incident portion 11 because the incident angle satisfies the total reflection condition (beyond the critical angle). Heading (optical path indicated by symbol M5 in FIG. 7).

さらに、上記光は上記入射部11でも全反射された後、上記曲面部12aへと向かう(図7の符号M6で示す光路)。該曲面部12aに向かう光は、上記曲面部12aで、上記入射部11から入射された光は、臨界角を下回った角度で入射するため、上記曲面部12aから上記導光部材1外部へと屈折しつつ出射される(図7の符号M7で示す光路)。   Further, the light is totally reflected by the incident portion 11 and then travels toward the curved surface portion 12a (an optical path indicated by reference numeral M6 in FIG. 7). The light traveling toward the curved surface portion 12a is the curved surface portion 12a, and the light incident from the incident portion 11 is incident at an angle below the critical angle. The light is emitted while being refracted (an optical path indicated by a symbol M7 in FIG. 7).

次に、上記光路Nについて説明すると、上記入射部11より入射した光は上記光路Mと同様に、まず、上記曲面部12aへと向かい(図7の符号N1で示す光路)、全反射される。該全反射された光は上記第2反射部14bへと向かい(図7の符号N2で示す光路)、該第2反射部14bにて反射され、該第2反射部14bにて反射された光は、上記平面部12bへと向かう(図7の符号N3で示す光路)。該平面部12bに向かう光は、上記平面部で、入射角が全反射条件を下回っているため、屈折しつつ上記導光部材1外部へと出射される(図7の符号N4で示す光路)。   Next, the optical path N will be described. The light incident from the incident part 11 first goes to the curved surface part 12a (the optical path indicated by reference numeral N1 in FIG. 7) and is totally reflected, like the optical path M. . The totally reflected light travels toward the second reflecting portion 14b (the optical path indicated by reference numeral N2 in FIG. 7), is reflected by the second reflecting portion 14b, and is reflected by the second reflecting portion 14b. Is directed to the plane portion 12b (optical path indicated by reference numeral N3 in FIG. 7). The light traveling toward the plane portion 12b is emitted to the outside of the light guide member 1 while being refracted because the incident angle is below the total reflection condition at the plane portion (the optical path indicated by reference numeral N4 in FIG. 7). .

上述の通り、上記導光部材1へ導光される光の入射方向w2と上記導光部材1から出射される光の出射方向w1が同方向である(直下型と呼ぶこととする)導光部材1で、上記曲面部12aを備えた構成としてなる導光部材1においては、上記入射部11から上記導光部材1内部に入射された光は、上記曲面部12aで全反射されるので、上記入射部11に位置する光源2は、出射方向w1からは視認されることがないため、違和感が無い。   As described above, the light guide direction w2 of light guided to the light guide member 1 and the light exit direction w1 of light emitted from the light guide member 1 are the same direction (referred to as a direct type). In the light guide member 1 configured to include the curved surface portion 12a in the member 1, the light incident on the light guide member 1 from the incident portion 11 is totally reflected by the curved surface portion 12a. Since the light source 2 located in the said incident part 11 is not visually recognized from the output direction w1, there is no sense of incongruity.

次に、上記照明装置X内部において、上記導光部材1の入射部11にて導光された光がどのような光路を辿るか、図8を用いて説明するが、上記導光部材1内部における光路の説明と同一の部分には同一の符号を付して、その説明は省略する。なお、図8においては、破線で示す光路M、一点鎖線で示す光路Nの2種類の代表的な光路が記載されている。   Next, it will be described with reference to FIG. 8 what optical path the light guided by the incident portion 11 of the light guide member 1 follows in the illumination device X. The same reference numerals are given to the same parts as those in the description of the optical path in FIG. In FIG. 8, two types of typical optical paths are described: an optical path M indicated by a broken line and an optical path N indicated by a one-dot chain line.

まず、上記光路Mにおいては、上記導光部材1内部における光路の説明にて述べたように、上記入射部11より入射した光は、図8の符号M1からM6で示す光路上を経て、上記曲面部12aから出射される。   First, in the optical path M, as described in the description of the optical path inside the light guide member 1, the light incident from the incident portion 11 passes through the optical path indicated by reference numerals M1 to M6 in FIG. The light is emitted from the curved surface portion 12a.

そして、該出射された光は上記第1外部反射部410へ向かい(図8の符号M7で示す光路)、該第1外部反射部510にて反射されて、上記拡散部6へ向かい(図8の符号M8で示す光路)、該拡散部6にて拡散されて上記照明装置Xが発光する。   The emitted light travels toward the first external reflector 410 (optical path indicated by reference numeral M7 in FIG. 8), is reflected by the first external reflector 510, and travels toward the diffuser 6 (FIG. 8). The light path indicated by reference numeral M8) is diffused by the diffusing section 6 and the illumination device X emits light.

次に、上記光路Nにおいても、上記導光部材1における光路の説明にて述べたように、図8の符号N1からN3で示す光路上を経て、上記平面部12bより出射され、該出射された光が上記拡散部6にて拡散されて上記光源装置Xが発光する。   Next, also in the optical path N, as described in the description of the optical path in the light guide member 1, the light is emitted from the planar portion 12b through the optical path indicated by reference numerals N1 to N3 in FIG. The diffused light is diffused by the diffusion unit 6 and the light source device X emits light.

従って、上記拡散部6の全面に渡って上記導光部材1の出射部12の全面から出射された光が上記拡散部6の全面に入射し、該拡散部6にて拡散されることで、上記照明装置Xは出射方向w1に対する面全体で発光することとなる。   Accordingly, the light emitted from the entire surface of the light emitting member 12 of the light guide member 1 is incident on the entire surface of the diffusion unit 6 and diffused by the diffusion unit 6 over the entire surface of the diffusion unit 6. The illumination device X emits light over the entire surface in the emission direction w1.

なお、上記構成において、照明装置Xに上記拡散部6を設けることにより、上記導光部材1から出射される光が有する指向性を緩和し、均一な光の出射が可能となり、輝度を均一にすることができ、又、グレア(眩しさ)の低減を図ることが可能となる。   In the above configuration, by providing the diffusing unit 6 in the illumination device X, the directivity of the light emitted from the light guide member 1 can be relaxed, uniform light emission can be achieved, and the luminance can be made uniform. In addition, it is possible to reduce glare (glare).

次に、図9を用いて、上記照明装置Xの回路構成について説明する。上記口金91の上記装着ピン91a、91b間には、一方の全波整流部71がインピーダンス素子710を介して接続されており、上記口金92の上記装着ピン92a、92b間には他方の全波整流部72がインピーダンス素子720を介して接続されている。   Next, the circuit configuration of the illumination device X will be described with reference to FIG. One full-wave rectifier 71 is connected between the mounting pins 91a and 91b of the base 91 via an impedance element 710, and the other full-wave is connected between the mounting pins 92a and 92b of the base 92. The rectifying unit 72 is connected via the impedance element 720.

上記インピーダンス素子710は抵抗R1及びコンデンサC1であり、該抵抗R1及びコンデンサC1は並列回路を構成して上記口金91a、91b間に接続するものであり、又、上記インピーダンス素子720も同様に、抵抗R2及びコンデンサC2であり、該抵抗R2及びコンデンサC2は並列回路を構成して上記口金92a、92b間に接続するものである。   The impedance element 710 is a resistor R1 and a capacitor C1, and the resistor R1 and the capacitor C1 constitute a parallel circuit and connected between the caps 91a and 91b. Similarly, the impedance element 720 is also a resistor. R2 and a capacitor C2. The resistor R2 and the capacitor C2 constitute a parallel circuit and are connected between the caps 92a and 92b.

又、上記全波整流部71、72の陽極側には、抵抗20a及び光源2である上記LEDチップ21を備える複数の光源回路20aからなる光源回路集合部20の一端が接続されており、さらに、上記全波整流部71、72の陽極側には、抵抗73aの一端が接続されている。   Further, one end of a light source circuit assembly unit 20 including a plurality of light source circuits 20 a including the resistor 20 a and the LED chip 21 as the light source 2 is connected to the anode side of the full wave rectification units 71 and 72. One end of a resistor 73a is connected to the anode side of the full-wave rectifying units 71 and 72.

なお、上記光源回路集合部20の他端には、トランジスタ73b及び抵抗73cを直列接続してなる直列回路の一端が夫々接続されており、上記抵抗73aの他端には、ダイオード73dが2個直列接続されてなる直列回路の一端が接続されており、さらに、上記抵抗73aの他端には、抵抗73eの一端が接続されている。これら上記抵抗73c、ダイオード73d及び上記抵抗73eの他端は、上記全波整流部71、72の陰極側に夫々接続されている。   One end of a series circuit formed by connecting a transistor 73b and a resistor 73c in series is connected to the other end of the light source circuit assembly 20, and two diodes 73d are connected to the other end of the resistor 73a. One end of a series circuit connected in series is connected, and one end of a resistor 73e is connected to the other end of the resistor 73a. The other ends of the resistor 73c, the diode 73d, and the resistor 73e are connected to the cathode side of the full-wave rectifiers 71 and 72, respectively.

そして、上記トランジスタ73bは、コレクタ電極を上記光源回路20aに、エミッタ電極を上記抵抗73cに夫々接続されており、上記トランジスタ73bのベース電極は、上記抵抗73aと上記抵抗73eとの接続点に接続されている。以上により、上記トランジスタ73bのベース電圧を一定にして、上記LEDチップ21の順電流を一定にする定電流部73が構成されている。   The transistor 73b has a collector electrode connected to the light source circuit 20a and an emitter electrode connected to the resistor 73c. The base electrode of the transistor 73b is connected to a connection point between the resistor 73a and the resistor 73e. Has been. As described above, the constant current unit 73 is configured to keep the base voltage of the transistor 73b constant and keep the forward current of the LED chip 21 constant.

上述の通り、上記照明装置Xは、上記導光部材の曲面部12aは、該曲面部12aにて全反射された光が上記第1反射部13a及び/若しくは第2反射部14bにおいて反射され、再び曲面部12aに入射し、該入射した光のうち全反射条件を満たさない光が上記曲面部12aから出射されるため、上記導光部材1に入射した光は、上記平面部12bだけでなく上記曲面部12aからも出射される、つまりは、上記出射部12の全面から出射されることとなり、さらに、該出射された光が上記拡散部6において拡散されることで、出射方向w1に対して、単体で、面全体で均一に発光する照明装置Xが実現できる。   As described above, in the lighting device X, the curved surface portion 12a of the light guide member reflects light totally reflected by the curved surface portion 12a at the first reflecting portion 13a and / or the second reflecting portion 14b. The light that is incident on the curved surface portion 12a again and the light that does not satisfy the total reflection condition out of the incident light is emitted from the curved surface portion 12a. Therefore, the light incident on the light guide member 1 is not only the flat surface portion 12b. The light is also emitted from the curved surface portion 12a. That is, the light is emitted from the entire surface of the emission portion 12, and further, the emitted light is diffused in the diffusion portion 6, so that the emission direction w1 is increased. Thus, the illumination device X that emits light uniformly over the entire surface can be realized.

又、上記曲面部12aは、上記入射部11から入射した光を全反射させるとともに、該全反射させた光を、例えば上記第1反射部13aで反射させて、上記曲面部12aから出射させるので、上記導光部材1の幅が狭くて、一方向の導光距離が短くても、十分な導光距離(曲面部12aと第1反射部13aとの間の往復距離)を確保できるため、出射部12での輝度の均一化を図ることができ、照明装置Xのグレア(眩しさ)を確実に防止することができる。   The curved surface portion 12a totally reflects the light incident from the incident portion 11, and reflects the totally reflected light, for example, by the first reflecting portion 13a and emits the light from the curved surface portion 12a. Even if the width of the light guide member 1 is narrow and the light guide distance in one direction is short, a sufficient light guide distance (reciprocating distance between the curved surface portion 12a and the first reflecting portion 13a) can be secured. It is possible to make the luminance uniform at the emitting portion 12, and to reliably prevent glare (glare) of the illumination device X.

なお、上記平面部12bで出射される光も、上述と同様に、曲面部12aと第1反射部13aとの間で複数回の反射を経た後に出射されるので、上記平面部12bでの輝度の均一化を図ることができ、照明装置Xのグレア(眩しさ)を確実に防止することができる。   Note that the light emitted from the flat surface portion 12b is also emitted after being reflected a plurality of times between the curved surface portion 12a and the first reflecting portion 13a in the same manner as described above. The glare (glare) of the lighting device X can be reliably prevented.

さらに、上記入射部11より入射した光は、上記出射部12に臨界角を下回る入射角で入射するまで、導光部材本体10内部にて全反射を含む反射を繰り返す(多重反射する)ため、幅方向xの導光距離のみならず、長手方向yの導光距離も十分に長く得られる。   Furthermore, the light incident from the incident part 11 repeats reflection including total reflection inside the light guide member body 10 until it is incident on the emitting part 12 at an incident angle lower than the critical angle (multiple reflection). Not only the light guide distance in the width direction x but also the light guide distance in the longitudinal direction y can be sufficiently long.

従って、長手方向yに配設されている上記LEDチップ21間における輝度の均一化も図ることができ、本実施の形態1において、例えば、上述した導光部材1のサイズ(幅方向xに19mm、厚さ方向zに9mm)において、上記LEDチップ21の配設間隔を20mmにした場合においても、長手方向yの輝度が均一化された導光部材の実現が可能となり、照明装置Xのグレア(眩しさ)を確実に防止することができる。   Accordingly, it is possible to make the luminance uniform between the LED chips 21 arranged in the longitudinal direction y. In the first embodiment, for example, the size of the light guide member 1 described above (19 mm in the width direction x) is used. 9 mm in the thickness direction z), even when the arrangement interval of the LED chips 21 is 20 mm, it is possible to realize a light guide member with uniform luminance in the longitudinal direction y. (Dazzle) can be reliably prevented.

そして、上述の実施の形態1に示すように、上記LEDチップ21を片側のみに配設することにより、従来一般の、両側にLEDチップを配設する場合に比較して、同一形状、かつ、同一の大きさで、同一個数のLEDチップを使用する際は、上記LEDチップ21を、片側に集中して配設することができて、LEDチップの配設間隔を狭くすることができ、従って、上記出射部12での輝度ムラが抑えられた(輝度が均一化された)導光部材の提供ができ、照明装置Xのグレア(眩しさ)を確実に防止することができる。   And as shown in the above-mentioned Embodiment 1, by arranging the LED chip 21 only on one side, compared with the conventional general case where the LED chips are arranged on both sides, the same shape, and When the same size and the same number of LED chips are used, the LED chips 21 can be concentrated on one side, and the interval between the LED chips can be narrowed. In addition, it is possible to provide a light guide member in which luminance unevenness in the light emitting unit 12 is suppressed (brightness is uniformized), and glare (glare) of the lighting device X can be reliably prevented.

因みに、従来一般の、両側にLEDチップを配設する場合の配設間隔で、上記導光部材1のように片側のみにLEDチップを配設すると、該LEDチップの個数を減らせることができて、しかも所望の輝度が出射部で得られるとともに、低コスト化を図ることができる。   Incidentally, if the LED chips are arranged only on one side like the light guide member 1 with the conventional arrangement interval when the LED chips are arranged on both sides, the number of LED chips can be reduced. In addition, a desired luminance can be obtained at the emitting portion, and cost can be reduced.

又、成形部である上記曲面部12aを、等角螺旋を用いた形状にすることで、上記入射部11から導光された光源2からの光に対して、全反射に必要な臨界角を担保しつつ、薄型化、軽量化、低コスト化された導光部材1を実現でき、照明装置Xの薄型化、軽量化、低コスト化を図ることができる。
さらに、上記光源2が上記筐体5の片側に配置されることで、同一の大きさ、同一の形状、同一の配設間隔で上記LEDチップ21を上記筐体5の両側に配設する場合に比べ、LEDチップの個数を削減することができる。
In addition, by forming the curved surface portion 12a, which is a molding portion, into a shape using an equiangular spiral, a critical angle necessary for total reflection is obtained with respect to light from the light source 2 guided from the incident portion 11. While ensuring, the light guide member 1 that is thin, light, and low in cost can be realized, and the lighting device X can be thin, light, and low in cost.
Further, when the light source 2 is arranged on one side of the casing 5, the LED chips 21 are arranged on both sides of the casing 5 with the same size, the same shape, and the same arrangement interval. Compared to the above, the number of LED chips can be reduced.

又、上記光源2が上記筐体5の片側に配置され、上記導光部材1は上記入射部11より導光された光がそのまま外部に出射されず、内部で複数回の反射(全反射を含む)を経て出射されることで、上記光源2の位置が視認されず、使用者に対する眩しさを低減できる。さらに、複数回の反射(全反射を含む)を経ることにより、長い導光距離を確保することができるため、輝度ムラを抑えることができる。   The light source 2 is disposed on one side of the housing 5, and the light guide member 1 does not emit the light guided from the incident portion 11 to the outside as it is. The position of the light source 2 is not visually recognized and the glare for the user can be reduced. Furthermore, since a long light guide distance can be ensured through a plurality of reflections (including total reflection), luminance unevenness can be suppressed.

そして、本発明にかかる照明装置Xによれば、上記導光部材1の第2反射部14bは幅方向xに対して傾斜を有しており、上記筐体5の上記底壁52内側には段差が設けられ、該段差の一方の段521に上記光源2が配設されることで、上記筐体5の底壁52内側の他方の段522に上記回路部7を収容するための空間が確保できるようになる。   And according to the illuminating device X concerning this invention, the 2nd reflection part 14b of the said light guide member 1 has an inclination with respect to the width direction x, and the said inner wall of the said bottom wall 52 of the said housing | casing 5 is provided. A step is provided, and the light source 2 is disposed in one step 521 of the step, so that a space for accommodating the circuit unit 7 is provided in the other step 522 inside the bottom wall 52 of the housing 5. It can be secured.

又、本発明にかかる照明装置Xによれば、上記筐体5に上記光源2及び回路部7を設けているため、該光源2及び回路部7からの熱を筐体5を通じて外気に効率的に逃がすことが可能となり、良好な放熱性を有しながら薄型の照明装置Xを実現できる。   Further, according to the illumination device X according to the present invention, since the light source 2 and the circuit unit 7 are provided in the housing 5, heat from the light source 2 and the circuit unit 7 is efficiently transferred to the outside air through the housing 5. Therefore, a thin lighting device X can be realized while having good heat dissipation.

さらに又、本発明にかかる照明装置Xによれば、上記口金91の上記装着ピン91a、91b間には、上記一方の全波整流部71が、上記口金92の上記装着ピン92a、92b間には上記他方の全波整流部72が夫々上記インピーダンス素子710、720を介して接続されているため、現在使用されている各種の直管蛍光灯用の灯具、例えば、グロースタータ式蛍光灯器具に使用された場合は、電源からの大電流が上記電気回路素子によって制限されてからグロースタータへ供給され、グロースタータへの大電流の供給が防止され、又、インバータ式蛍光灯器具に使用された場合は、口金の2つのピン間、つまり上記電気回路素子に流れる電流が検知でき、上記LEDチップへの電圧の印加が正常に行われ、さらに又、ラピッドスタート式蛍光灯器具に使用された場合は、電子安定器からの予熱電流が上記電気回路素子へ流れて消費されるだけで上記LEDチップの点灯等に支障を起こさない。   Furthermore, according to the illumination device X of the present invention, between the mounting pins 91a and 91b of the base 91, the one full-wave rectifying unit 71 is between the mounting pins 92a and 92b of the base 92. Since the other full-wave rectification unit 72 is connected via the impedance elements 710 and 720, the lamps for various straight tube fluorescent lamps currently used, for example, glow starter type fluorescent lamp fixtures, are used. When used, a large current from the power source is limited by the electric circuit element before being supplied to the glow starter, preventing a large current from being supplied to the glow starter, and also used for inverter type fluorescent lamp fixtures. In this case, the current flowing between the two pins of the base, that is, the electric circuit element can be detected, the voltage is normally applied to the LED chip, and the rapid start is also performed. When used in a fluorescent lamp fixture, the preheating current from the electronic ballast does not cause problems in the lighting or the like of the LED chips only consumed flows into the electric circuit device.

本発明の照明装置の実施の形態1において、上記照明装置Xは、テレビや携帯電話のバックライトや、スタンドライト、電球型照明、その他、屋外灯・屋内灯等の一般照明の照明装置に適用することが可能である。   In Embodiment 1 of the illumination device of the present invention, the illumination device X is applied to a backlight device for a television or a mobile phone, a stand light, a bulb-type illumination, and other general illumination devices such as outdoor and indoor lights. Is possible.

なお、上記導光部材1においては、上記LEDチップ21が、上記LED基板22上に所定の間隔をおいて一列で直線上に配設される場合を例に挙げて説明したが、上記入射部11にて導光された上記光源2からの光に対して、入射角が、少なくとも、全反射させるための臨界角を有するようにしていれば良いので、複数列配設しても良く、又、千鳥状に配設しても良い。   In the light guide member 1, the LED chip 21 is described as an example in which the LED chips 21 are arranged on the LED substrate 22 in a straight line at a predetermined interval. Since the incident angle with respect to the light from the light source 2 guided at 11 has at least a critical angle for total reflection, a plurality of rows may be arranged. Alternatively, they may be arranged in a staggered pattern.

又、上記光源2は上記LEDチップ21以外にも様々な種類の光源を用いることが考えられ、例えば、細長い面状光源としてCCFLを用い、該CCFLからの光が上記導光部材1の入射部11より入射するよう配設しても良く、そして、小型のEL(エレクトロ・ルミネッセンス)を線状光源若しくは点状光源として用いても良く、上記実施の形態1に用いた導光部材1に限定されるものではない。   In addition to the LED chip 21, various types of light sources may be used as the light source 2. For example, a CCFL is used as an elongated planar light source, and the light from the CCFL is incident on the light guide member 1. 11 may be disposed so as to be incident, and a small EL (electroluminescence) may be used as a linear light source or a point light source, and is limited to the light guide member 1 used in the first embodiment. Is not to be done.

なお、上記光源2にELを用いる場合は、例えば、本発明の実施の形態1に示す上記LEDチップ21と同程度の大きさを有する有機ELを設けて、点光源として列状に配設しても良いし、CCFLのような細長い面状光源として上記入射部11より入射するよう配設しても良い。   In addition, when using EL for the said light source 2, for example, organic EL which has a magnitude | size comparable as the said LED chip 21 shown in Embodiment 1 of this invention is provided, and it arrange | positions in a line form as a point light source. Alternatively, it may be disposed as an elongated planar light source such as a CCFL so as to be incident from the incident portion 11.

上記いずれの光源を用いる場合においても、上記光源の幅方向xの大きさに応じて、上記入射部11にて導光された光が臨界角以上の入射角を有するように上記曲面部12aの形状を設計して、出射面12全体で発光する上記導光部材1の実現を図るものである。   In any case of using any of the light sources, the curved surface portion 12a has a light incident on the incident portion 11 having an incident angle greater than a critical angle according to the size of the light source in the width direction x. The shape of the light guide member 1 that is designed to emit light on the entire emission surface 12 is designed.

さらに、上記導光部材1において、上記曲面部12aの形状を、上記等角螺旋を用いた形状について説明したが、上記入射部11からの光が臨界角以上の入射角を有するように上記曲面部12aの形状を設計できるのであれば良く、例えば、楕円曲線を用いても良いし、平面を複数組み合わせたものや、1つの平面で構成しても良く、上記実施の形態1に用いた導光部材1に限定されるものではない。   Further, in the light guide member 1, the shape of the curved surface portion 12 a has been described with respect to the shape using the equiangular spiral, but the curved surface so that the light from the incident portion 11 has an incident angle greater than a critical angle. As long as the shape of the portion 12a can be designed, for example, an elliptic curve may be used, a combination of a plurality of planes, or a single plane may be used. It is not limited to the optical member 1.

そして、上記導光部材1において、上記第1反射部13a及び第2反射部14bに反射機能を持たせるために別体に反射板を設けた場合を例に説明したが、それ以外の手段により反射機能を持たせても良く、例えば、反射板の代わりに反射シートを貼着しても良いし、第1反射部13a及び第2反射部14bに直接ドット印刷加工、あるいは、アルミや銀等の金属の蒸着加工を施しても良く、上記実施の形態1に用いた導光部材1に限定されるものでない。   And in the said light guide member 1, although the case where the reflecting plate was provided in the different body in order to give a reflective function to the said 1st reflective part 13a and the 2nd reflective part 14b was demonstrated to the example, by other means A reflection function may be provided, for example, a reflection sheet may be attached instead of the reflection plate, or dot printing processing is directly performed on the first reflection portion 13a and the second reflection portion 14b, or aluminum or silver is used. However, the present invention is not limited to the light guide member 1 used in the first embodiment.

さらに、上記第1反射部13aと第2反射部14bとで別の加工にて反射機能を持たせる、若しくは、上記第1反射部13aと第2反射部14bのどちらかのみに反射機能を持たせる等の方法を用いても良く、上記実施の形態1に用いた導光部材1に限定されるものでない。   Further, the first reflecting portion 13a and the second reflecting portion 14b have a reflecting function by different processing, or only one of the first reflecting portion 13a and the second reflecting portion 14b has a reflecting function. However, the present invention is not limited to the light guide member 1 used in the first embodiment.

ここで、上記構成において、第1反射部13a・第2反射部14b・第1外部反射部510・第2外部反射部511の各々に拡散性を持たせなかった(有しない)場合と持たせた(有する)場合について、図10及び図11に示すシミュレーション結果の説明図を用いて説明する。   Here, in the above-described configuration, each of the first reflecting portion 13a, the second reflecting portion 14b, the first external reflecting portion 510, and the second external reflecting portion 511 is not given (does not have) diffusibility. The case of having (having) will be described with reference to the explanatory diagrams of the simulation results shown in FIGS.

なお、図10及び図11において、光源2及び導光部材1及び第1反射部13a・第2反射部14b・第1外部反射部510・第2外部反射部511以外の構成は、反射・拡散に直接寄与しないため、点線にて記しており、又、拡散部6に入射した光の拡散効果については示していない。   10 and 11, the configuration other than the light source 2, the light guide member 1, the first reflection unit 13 a, the second reflection unit 14 b, the first external reflection unit 510, and the second external reflection unit 511 is reflective / diffuse. Since the light does not directly contribute to the light, it is indicated by a dotted line, and the diffusion effect of the light incident on the diffusion portion 6 is not shown.

まず、上記第1反射部13a・第2反射部14b・第1外部反射部510・第2外部反射部511に拡散性を持たせなかった場合は、図10に示すように、光源2からの光が入射部11より導光部材本体10内部に導光され、上記実施の形態1で詳細に説明したように、曲面部12aでの全反射を含む複数回の反射を経て上記導光部材本体10の出射部12全体から出射された後に拡散部6へと入射するため、出射方向w1に対して面全体で発光する照明装置として機能する。   First, when the first reflecting portion 13a, the second reflecting portion 14b, the first external reflecting portion 510, and the second external reflecting portion 511 are not diffused, as shown in FIG. Light is guided into the light guide member main body 10 from the incident portion 11, and as described in detail in the first embodiment, the light guide member main body undergoes a plurality of reflections including total reflection at the curved surface portion 12a. Since the light is emitted from the entire 10 emission parts 12 and then enters the diffusion part 6, it functions as an illumination device that emits light over the entire surface in the emission direction w1.

次に、上記第1反射部13a・第2反射部14b・第1外部反射部510・第2外部反射部511に反射機能に加えて拡散性を持たせた場合は、図11に示すように、光源2からの光が入射部11より導光部材本体10内部に導光され、上記実施の形態1で詳細に説明したように、曲面部12aでの全反射を含む複数回の反射を経て上記導光部材本体10の出射部12全体から出射された後に拡散部6へと入射するため、出射方向w1に対して面全体で発光する照明装置として機能する。   Next, when the first reflecting portion 13a, the second reflecting portion 14b, the first external reflecting portion 510, and the second external reflecting portion 511 are provided with a diffusive function in addition to the reflecting function, as shown in FIG. The light from the light source 2 is guided into the light guide member main body 10 from the incident portion 11 and undergoes a plurality of reflections including total reflection at the curved surface portion 12a as described in detail in the first embodiment. Since the light is emitted from the entire light emitting part 12 of the light guide member body 10 and then enters the diffusion part 6, it functions as an illuminating device that emits light over the entire surface in the light emitting direction w1.

なお、上記第1反射部13a・第2反射部14b・第1外部反射部510・第2外部反射部511に拡散性を持たせるための加工方法には、例えば、拡散性の高い反射シートであるMCPET(古河電気工業株式会社の登録商標)を用いても良いし、拡散効果を有するインクをドット状に印刷するドット印刷、樹脂表面に凹凸上の模様を作製するシボ加工、V字型の溝を形成するV溝加工、微小な三角柱形状を多数配設するマイクロプリズム加工、あるいは微小なレンズ形状を多数配設するマイクロレンズ加工等がある。   The processing method for imparting diffusibility to the first reflecting portion 13a, the second reflecting portion 14b, the first external reflecting portion 510, and the second external reflecting portion 511 includes, for example, a highly diffusive reflecting sheet. A certain MCPET (registered trademark of Furukawa Electric Co., Ltd.) may be used, dot printing that prints ink having a diffusion effect in a dot shape, embossing to create a pattern on the resin surface, V-shaped There are V-groove processing for forming grooves, micro-prism processing for arranging a large number of minute triangular prism shapes, or micro-lens processing for arranging a large number of minute lens shapes.

上述のように、第1反射部13a、第2反射部14b、第1外部反射部510、第2外部反射部511に反射機能に加えて拡散性を持たせた場合、図11に示すように、拡散性を有した反射現象で、拡散部6に入射する光量の強弱が緩和され、より均一な拡散が行われ、輝度ムラの低減効果がある。   As described above, when the first reflecting portion 13a, the second reflecting portion 14b, the first external reflecting portion 510, and the second external reflecting portion 511 are made diffusive in addition to the reflecting function, as shown in FIG. The intensity of the amount of light incident on the diffusing portion 6 is mitigated by the reflection phenomenon having diffusibility, and more uniform diffusion is performed, and there is an effect of reducing luminance unevenness.

なお、上記第1反射部13a及び第2反射部14bに拡散性を持たせる場合、拡散の程度を位置によって変化させると、出射する光の均一化を図ることができ、特に第2反射部14において拡散の程度を変化させる場合は、例えば、光量が不足している領域に部分的にシボ加工を施したり、マイクロレンズ加工の配設する密度を幅方向xに変化させたりすることで、さらなる光の均一化、輝度ムラの低減効果が得られる。   In addition, when making the said 1st reflection part 13a and the 2nd reflection part 14b have a diffusivity, when the grade of a spreading | diffusion is changed with a position, the emitted light can be equalize | homogenized, especially the 2nd reflection part 14 is demonstrated. In the case where the degree of diffusion is changed in, for example, a part of the region where the amount of light is insufficient is subjected to a graining process, or the density at which the microlens processing is arranged is changed in the width direction x. The effect of making the light uniform and reducing the luminance unevenness can be obtained.

又、本発明の照明装置の実施の形態1において、上記導光部材1の第2反射部14は上記光源2(入射部11)に近づくにつれ上記導光部材1の厚さ方向zの大きさが増すように傾斜を設けた上記第2反射部14bである場合を例に挙げて説明したが、上記導光部材1の厚さが一定になるよう、上記第2反射部14を上記平面部12bと平行に設けても良く、上記実施の形態1に用いた導光部材1に限定されるものではない。   Moreover, in Embodiment 1 of the illuminating device of this invention, the 2nd reflection part 14 of the said light guide member 1 is the magnitude | size of the thickness direction z of the said light guide member 1 as it approaches the said light source 2 (incident part 11). In the above description, the second reflective portion 14b is provided with an inclination so that the thickness of the light guide member 1 is constant. 12b may be provided in parallel, and is not limited to the light guide member 1 used in the first embodiment.

ここで、第2反射部14・第1外部反射部510・第2外部反射部511に拡散性を持たせた場合と持たせなかった場合、又、第2反射部14に傾斜を持たせた場合と持たせなかった場合の光の均一度について、図12とともに説明する。   Here, when the second reflecting portion 14, the first external reflecting portion 510, and the second external reflecting portion 511 are made diffusive or not, the second reflecting portion 14 is inclined. The uniformity of light with and without the case will be described with reference to FIG.

図12は、上記照明装置において、反射部が様々な反射特性を有する場合の光の均一度を測定したシミュレーション結果に基づく説明図であり、特性曲線lから特性曲線oの4種類の特性曲線が記載されている。   FIG. 12 is an explanatory diagram based on a simulation result obtained by measuring the uniformity of light when the reflecting unit has various reflection characteristics in the above-described lighting device, and four types of characteristic curves from a characteristic curve l to a characteristic curve o are shown. Are listed.

なお、特性曲線lは第2反射部14・第1外部反射部41a・第2外部反射部41bが拡散性を有し、かつ、第2反射部14が傾斜を有する第2反射部14bである場合の特性曲線であり、特性曲線mは第2反射部14・第1外部反射部41a・第2外部反射部41bが拡散性を有さず、かつ、第2反射部14が傾斜を有する第2反射部14bである場合の特性曲線であり、特性曲線nは第2反射部14・第1外部反射部41a・第2外部反射部41bが拡散性を有し、かつ、第2反射部14が傾斜を有さない第2反射部14aである場合の特性曲線であり、特性曲線oは第2反射部14・第1外部反射部41a・第2外部反射部41bが拡散性を有さず、かつ、第2反射部14が傾斜を有さない第2反射部14aである場合の特性曲線である。   The characteristic curve 1 is the second reflecting portion 14b in which the second reflecting portion 14, the first external reflecting portion 41a, and the second external reflecting portion 41b are diffusive and the second reflecting portion 14 is inclined. The characteristic curve m indicates that the second reflecting portion 14, the first external reflecting portion 41a, and the second external reflecting portion 41b are not diffusive and the second reflecting portion 14 is inclined. The characteristic curve n is a characteristic curve in the case of the two reflection portions 14b, and the characteristic curve n is that the second reflection portion 14, the first external reflection portion 41a, and the second external reflection portion 41b are diffusive, and the second reflection portion 14 Is a characteristic curve in the case of the second reflecting portion 14a having no inclination, and the characteristic curve o indicates that the second reflecting portion 14, the first external reflecting portion 41a, and the second external reflecting portion 41b do not have diffusibility. And the characteristic curve in case the 2nd reflection part 14 is the 2nd reflection part 14a which does not have an inclination. .

なお、図11に示す横軸qは光源2からの距離を表し、縦軸pは上記4つの場合の夫々において最も輝度が高い地点での縦軸の値を1とした場合の光の量を表しており、導光部材1より出射される光の均一度を表している。   The horizontal axis q shown in FIG. 11 represents the distance from the light source 2, and the vertical axis p represents the amount of light when the value of the vertical axis at the highest luminance point is 1 in each of the above four cases. The uniformity of the light emitted from the light guide member 1 is shown.

さらに、第2反射部14に拡散性を持たせた場合(特性曲線l及び特性曲線nの場合)は、入射部11から遠くなるに従って、拡散性を強めた場合についてのシミュレーションをしている。実際に導光部材を製造する場合、例えば、ドット印刷を行う際のインクに含有させる拡散粒子の割合を多くすることで拡散性を強めることができる。   Further, when the second reflecting portion 14 is given diffusibility (in the case of the characteristic curve 1 and the characteristic curve n), a simulation is performed for the case where the diffusivity is increased as the distance from the incident portion 11 increases. When the light guide member is actually manufactured, for example, the diffusibility can be increased by increasing the ratio of the diffusing particles contained in the ink when performing dot printing.

図11の光の均一度を測定したシミュレーション結果から、第2反射部14・第1外部反射部41a・第2外部反射部41bが拡散性を有することにより、縦軸の変化量が少なくなっていること、又、導光部材1が第2反射部14にて傾斜を有することによって、光が均一に出射されることが分かる。   From the simulation result of measuring the uniformity of the light in FIG. 11, the second reflecting portion 14, the first external reflecting portion 41 a, and the second external reflecting portion 41 b have diffusivity, so that the amount of change in the vertical axis is reduced. In addition, it can be seen that the light guide member 1 is inclined by the second reflecting portion 14 so that light is emitted uniformly.

なお、第1反射部13に傾斜が設けられず(平面部12bと垂直に設けられた場合)、かつ、第2反射部14にも傾斜が設けられなかった場合(平面部12bと平行に設けられた場合、平面として形成された場合)、光は光源2側から多く出射される。   In addition, when the 1st reflection part 13 is not provided with an inclination (when provided perpendicular to the plane part 12b), and when the 2nd reflection part 14 is also provided with no inclination (provided parallel to the plane part 12b). A large amount of light is emitted from the light source 2 side.

この場合においても、導光部材1は出射面12の全面から光を出射するため、出射方向w1に対して面全体で発光する照明装置Xが実現できる。   Also in this case, since the light guide member 1 emits light from the entire surface of the emission surface 12, the illumination device X that emits light over the entire surface in the emission direction w1 can be realized.

上述のように、上記第1反射部13が厚さ方向zに対して傾斜を有するか否か、又、上記第2反射部14が幅方向xに対して傾斜を有するか否か、又、第1反射部13が拡散性を有するか否か、又、第2反射部14が拡散性を有するか否かについては、有するか否かのどちらであろうとも、傾斜と拡散性の度合いを適宜調節することによって出射方向w1に対して全面で発光する照明装置の実現が可能である。   As described above, whether the first reflecting portion 13 is inclined with respect to the thickness direction z, whether the second reflecting portion 14 is inclined with respect to the width direction x, Whether the first reflecting portion 13 has diffusibility or the second reflecting portion 14 has diffusivity, whether it has or not, the degree of inclination and diffusivity is determined. By appropriately adjusting, it is possible to realize an illumination device that emits light over the entire surface in the emission direction w1.

又、本発明の照明装置の実施の形態1において、上記照明装置Xは板状の上記拡散部6を用いて説明したが、照明装置X外側の面に丸みを持たせた形状の拡散部を用いても良いし、照明装置X内側の面を上記導光部材の上記出射部12に沿った形状の拡散部を用いても良く、上記実施の形態1に限られるものではない。いずれにしても、面全体で発光する、均一性の向上した照明装置の提供が可能となる。   In Embodiment 1 of the lighting device according to the present invention, the lighting device X has been described using the plate-like diffusion portion 6. However, the diffusion portion having a rounded shape on the outer surface of the lighting device X is provided. It may be used, and the inner surface of the lighting device X may be a diffusing portion having a shape along the light emitting portion 12 of the light guide member, and is not limited to the first embodiment. In any case, it is possible to provide a lighting device that emits light over the entire surface and has improved uniformity.

さらに又、本発明の照明装置の実施の形態1において、上記光源装置Xは、テレビや携帯電話、その他情報表示装置等のバックライトや、スタンドライト、電球型照明、その他、屋外灯・屋内灯等の一般照明の照明装置に適用することが可能である。   Furthermore, in Embodiment 1 of the lighting device of the present invention, the light source device X is a backlight for a television, a mobile phone, other information display devices, a stand light, a bulb-type lighting, and other outdoor / indoor lights. It is possible to apply to the illumination device of general illumination such as.

そして、本発明の照明装置の実施の形態1において、上記照明装置Xは拡散部6を備えた場合を例に挙げて説明したが、これに限るものではなく、例えば、テレビや携帯電話、その他情報表示装置等のバックライトに用いる場合においては、拡散部6が無くても良い。その場合でも、出射方向w1に対して面全体で発光する照明装置の提供は可能である。   And in Embodiment 1 of the illuminating device of this invention, although the said illuminating device X mentioned and demonstrated as an example the case provided with the spreading | diffusion part 6, it is not restricted to this, For example, a television, a mobile telephone, others When used for a backlight of an information display device or the like, the diffusing unit 6 may be omitted. Even in that case, it is possible to provide an illumination device that emits light over the entire surface in the emission direction w1.

さらに、本発明にかかる照明装置Xによれば、上記筐体5に光源2を設けているため、該光源2からの熱を筐体5を通じて外気に効率的に逃がすことが可能となり、良好な放熱性を有しながら薄型の照明装置Xを実現できる。   Furthermore, according to the illuminating device X according to the present invention, since the light source 2 is provided in the housing 5, heat from the light source 2 can be efficiently released to the outside air through the housing 5. A thin lighting device X can be realized while having heat dissipation.

又、本発明の照明装置の実施の形態1において、上記筐体5はアルミニウム等の熱伝導性(放熱性)の高い金属にて形成された場合を例に説明したが、アルミニウムに限るものではなく、アルミニウム以外の金属、例えば銅や銀、チタン等の熱伝導性(放熱性)の高い金属にて形成しても良く、上記実施の形態1に限定されるものでない。   Moreover, in Embodiment 1 of the lighting device of the present invention, the case 5 is described as an example in which the case 5 is formed of a metal having high thermal conductivity (heat dissipation) such as aluminum. However, the case 5 is not limited to aluminum. Alternatively, it may be formed of a metal other than aluminum, for example, a metal having high thermal conductivity (heat dissipation) such as copper, silver, or titanium, and is not limited to the first embodiment.

さらに又、本発明の照明装置の実施の形態1において、上記インピーダンス素子710、720は夫々抵抗R1及びコンデンサC1、抵抗R2及びコンデンサC2で、並列回路を構成してなるとして説明したが、これに限るものではなく、直列回路を構成しても良いし、抵抗・コンデンサ及び/若しくはインダクタンス素子の回路素子を単体、若しくは上記回路素子を組合せた並列回路若しくは直列回路、並列回路と直列回路の組合せにより構成しても良く、上記実施の形態1に限定されるものでない。   Furthermore, in the first embodiment of the lighting device of the present invention, the impedance elements 710 and 720 have been described as forming a parallel circuit with the resistor R1, the capacitor C1, the resistor R2, and the capacitor C2, respectively. It is not limited, and a series circuit may be configured. A circuit element of a resistor / capacitor and / or an inductance element may be used alone, or a parallel circuit or a series circuit combining the above circuit elements, or a combination of a parallel circuit and a series circuit. It may be configured and is not limited to the first embodiment.

さらに、本発明の照明装置の実施の形態1において、上記導光部材1は単体で上記筐体5内部に配設された場合を例に挙げて説明したが、これに限るものではなく、小型の導光部材を長手方向yに複数個繋ぎ合わせたものを用いても良く、上記実施の形態1に限定されるものでない。なお、上記小型の導光部材を繋ぎ合わせる際は、該導光部材と同程度の屈折率を有する接着材を使用することが好ましい。   Furthermore, in Embodiment 1 of the lighting device of the present invention, the light guide member 1 is described as an example in which the light guide member 1 is disposed inside the housing 5 as a single unit. However, the present invention is not limited to this. A plurality of the light guide members connected in the longitudinal direction y may be used, and the present invention is not limited to the first embodiment. In addition, when connecting the said small light guide member, it is preferable to use the adhesive material which has a refractive index comparable as this light guide member.

又、上記小型の導光部材を複数用いることで、現状の20W、32W、40W、60Wの直管型蛍光灯用灯具のように、複数種類の大きさの筐体に対応可能となるよう、導光部材の長手方向yの寸法を最適化することが可能となり、複数種類の大きさの筐体に対応可能となるような寸法に設計すれば、異なる種類の筐体へ用いる際、上記導光部材の個数を変更するだけで良くなり、別途新たに設計する必要がなく、低コスト化を図れる。   In addition, by using a plurality of the above-mentioned small light guide members, it becomes possible to deal with a plurality of types of cases such as the current 20W, 32W, 40W, 60W straight tube fluorescent lamps. It is possible to optimize the dimension of the light guide member in the longitudinal direction y, and if the dimensions are designed to be compatible with a plurality of types of casings, the above-mentioned guides can be used for different types of casings. It is only necessary to change the number of optical members, and it is not necessary to design a new one separately, so that the cost can be reduced.

なお、上記小型の導光部材を複数用いる場合、長手方向yの寸法が上記光源2と同じ、もしくは、その整数倍であると上記光源2との組合せが容易となり、複数種類の筐体に対応することが容易となるため、より好ましい。   When a plurality of small light guide members are used, if the dimension in the longitudinal direction y is the same as that of the light source 2 or an integral multiple thereof, the combination with the light source 2 is facilitated, and it is compatible with a plurality of types of housings. This is more preferable because it is easy to do.

さらに、本発明の照明装置の実施の形態1において、上記光源2は長手方向yに4個配設された場合を例に挙げて説明したが、これに限るものではなく、単体で用いても良いし、4個以外の複数個用いても良く、上記実施の形態1に限定されるものでない。   Furthermore, in Embodiment 1 of the illumination device of the present invention, the case where four light sources 2 are arranged in the longitudinal direction y has been described as an example. However, the present invention is not limited to this and may be used alone. A plurality other than four may be used and is not limited to the first embodiment.

なお、単体の光源を用いる場合は、同じ大きさの筐体に同じ個数LEDチップを使用するとして、光源を複数個配設する場合より配設の手間が省けて効率的であり、又、複数個の光源を用いる場合は、配設する光源の個数を変更するのみで、複数種類の大きさの筐体に対応可能となるよう、上記光源の大きさ、特に長手方向yの寸法を最適化することが可能となり、複数種類の大きさの筐体を製造する際は、上記光源が複数種類の筐体に対応可能な寸法を有するため、上記光源の配設する個数を変更するだけで良く、別途設計する必要がないため、全体的なコストの低減を図ることができる。   In addition, when using a single light source, it is more efficient because there is less time and effort than arranging a plurality of light sources, assuming that the same number of LED chips are used in a casing of the same size. In the case of using a single light source, the size of the light source, particularly the dimension in the longitudinal direction y, is optimized so that it can be applied to a plurality of types of housings by simply changing the number of light sources arranged. When manufacturing a plurality of types of housings, the light source has dimensions that can accommodate a plurality of types of housings, so it is only necessary to change the number of the light sources disposed. Since no separate design is required, the overall cost can be reduced.

さらに、本発明の照明装置の実施の形態1において、上記筐体5の一方の側壁(光源側筐体側壁)51に設けられたもう一つの反射部として、第1外部反射部(外部反射体)510が垂直方向(厚さ方向y)に設けられるとともに、第2外部反射部511が水平方向(幅方向x)に設けられているとして説明したが、これに限るものではなく、例えば、図13に示すように、上記筐体5の一方の側壁(光源側筐体側壁)51には、絶縁シート512aが設けられ、外部反射部512が傾斜を有するよう保持されるとしても良い。
なお、絶縁シート512aは筐体5と光源2が接触することによる誤動作を防ぐものである。
Furthermore, in Embodiment 1 of the lighting device of the present invention, as another reflecting portion provided on one side wall (light source side housing side wall) 51 of the casing 5, a first external reflecting section (external reflecting body) is provided. ) 510 is provided in the vertical direction (thickness direction y) and the second external reflector 511 is provided in the horizontal direction (width direction x). However, the present invention is not limited to this. As shown in FIG. 13, one side wall (light source side housing side wall) 51 of the housing 5 may be provided with an insulating sheet 512 a and the external reflecting portion 512 may be held so as to be inclined.
The insulating sheet 512a prevents malfunction due to contact between the housing 5 and the light source 2.

このようにすることにより、傾斜を有さない場合より多くの上記導光部材1から出射される光を上記拡散部6の方向に反射させることができるため、上記導光部材1への再入射を低減するとともに、出射方向w1から見た、上記拡散部6の光源側筐体側壁51に近い長手方向yの全体の領域Kでの輝度向上の効果がある。   By doing so, more light emitted from the light guide member 1 can be reflected in the direction of the diffusing portion 6 than when there is no inclination, and therefore re-enter the light guide member 1. In addition, there is an effect of improving luminance in the entire region K in the longitudinal direction y close to the light source side housing side wall 51 of the diffusing portion 6 as viewed from the emission direction w1.

また、本発明の照明装置Xは出射方向w1に対する面全体で発光するため、該照明装置Xを複数個、天井や床面、壁面等にタイル状(ブロック状、格子状)に並べることにより、任意の形状を有し、出射方向に対する面全体で発光する照明装置一式の実現が可能である。   In addition, since the illumination device X of the present invention emits light over the entire surface in the emission direction w1, by arranging a plurality of the illumination devices X in a tile shape (block shape, lattice shape) on the ceiling, floor surface, wall surface, etc. It is possible to realize a set of lighting devices that have an arbitrary shape and emit light over the entire surface in the emission direction.

例えば、本発明の光源及び導光部材を導光部材の長手方向yに複数個、短手方向xに複数個配設した光源ユニットを構成し、該光源ユニットを収納する筐体及び、光源ユニットの出射方向から見た面全体を覆って上記筐体に装着されてなる拡散部からなる照明装置としても良く、本実施の形態1に限定されない。   For example, a light source unit in which a plurality of light sources and light guide members of the present invention are arranged in the longitudinal direction y of the light guide member and a plurality of light guide members in the lateral direction x is configured, and a housing that houses the light source unit, and a light source unit The illumination device may include a diffusing portion that covers the entire surface viewed from the emission direction of the light and is attached to the housing, and is not limited to the first embodiment.

なお、上記の例において、導光部材の長手方向yと短手方向xの比と、導光部材を長手方向yに配設する個数と短手方向xに配設する個数の比が、逆比の関係(導光部材の長手方向yと短手方向xの比が2:3であるとすると、導光部材を長手方向yに配設する個数と短手方向xに配設する個数の比が3:2)となるように構成すると、長手方向yと短手方向xの比が1:1となる正方形状の照明装置が実現できる。   In the above example, the ratio of the longitudinal direction y to the lateral direction x of the light guide member and the ratio of the number of the light guide members disposed in the longitudinal direction y to the number of the light guide members disposed in the lateral direction x are reversed. Ratio relationship (assuming that the ratio of the longitudinal direction y of the light guide member to the lateral direction x is 2: 3, the number of the light guide members arranged in the longitudinal direction y and the number of the light guide members arranged in the short direction x) If the ratio is configured to be 3: 2), a square illumination device in which the ratio of the longitudinal direction y to the lateral direction x is 1: 1 can be realized.

又、上記光源ユニットを正方形状に配設して構成された照明装置に限らず、その他任意の個数を長手方向及び短手方向に配設して任意の形状の照明装置を構成しても良い。
さらに又、上記では光源及び導光部材を用いて光源ユニットを構成する場合を例に挙げたが、さらに導光部材と同じ長手方向yと短手方向xの大きさを有する拡散部を加えて光源ユニットを構成しても良いし、さらに筐体を含めて光源ユニットを構成して、該光源ユニットを配設し照明装置としても良く、この場合においても任意の形状の照明装置が実現できる。
In addition, the lighting device is not limited to a configuration in which the light source units are arranged in a square shape, and any number of other lighting devices may be arranged in the longitudinal direction and the short direction to constitute an illumination device having an arbitrary shape. .
Furthermore, in the above, the case where the light source unit is configured by using the light source and the light guide member has been described as an example, but a diffusion part having the same size in the longitudinal direction y and the short direction x as the light guide member is added. A light source unit may be configured, and a light source unit including a housing may be configured, and the light source unit may be provided as an illumination device. In this case also, an illumination device having an arbitrary shape can be realized.

(実施の形態2)
次に、本発明の照明装置の他の実施の形態について、図14から図16を用いて説明する。なお、上記実施の形態1と同一部分には同一符号を付し、その説明は省略する。
本発明の照明装置Yは、図14に示すように、導光部材1Aと、光源2と、該導光部材1A及び光源2を内部に備えてなる筐体5と、上記導光部材1の出射部12からの光を拡散するための拡散部6とから構成されてなるものである。
(Embodiment 2)
Next, another embodiment of the lighting device of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 14, the illumination device Y of the present invention includes a light guide member 1 </ b> A, a light source 2, a housing 5 including the light guide member 1 </ b> A and the light source 2 therein, and the light guide member 1. It comprises a diffusing unit 6 for diffusing light from the emitting unit 12.

上記導光部材1Aは、上記実施の形態1で用いた導光部材1と同様に、透明若しくは半透明の樹脂材料からなる導光部材本体10に光源2からの光を入射する入射部11を設け、該入射部11から入射した光を導光して全反射させるとともにその全反射させた光をさらに反射面である反射部としての第1反射部13及び/若しくは第2反射部14にて反射させて該反射部にて反射させた光を出射する成形部としての曲面部12aを設け、さらに、該曲面部12aにて全反射させた光を上記第1反射部13及び/若しくは上記第2反射部14により反射させて出射させる平面部12bを設け、該曲面部12a及び平面部12bにて出射部12を設けて構成するものである。   The light guide member 1 </ b> A has an incident portion 11 that makes light from the light source 2 incident on a light guide member body 10 made of a transparent or translucent resin material, like the light guide member 1 used in the first embodiment. The light incident from the incident portion 11 is guided and totally reflected, and the totally reflected light is further reflected by the first reflecting portion 13 and / or the second reflecting portion 14 as a reflecting portion which is a reflecting surface. A curved surface portion 12a is provided as a molding portion that emits the light reflected and reflected by the reflective portion, and the light totally reflected by the curved surface portion 12a is further reflected by the first reflective portion 13 and / or the first reflective portion. The flat part 12b reflected and emitted by the two reflecting parts 14 is provided, and the emitting part 12 is provided by the curved surface part 12a and the flat part 12b.

なお、上記導光部材1Aの第1反射部13は、厚さ方向zに対して傾斜を有する状態を示し、以下このような状態の第1反射部13を符号13bで示し、又、上記導光部材1Aの第2反射部14は、幅方向(短手方向)xに対して傾斜を有さない(平面な)状態を示し、以下このような状態の第2反射部14を符号14aで示す。   The first reflecting portion 13 of the light guide member 1A is in a state of being inclined with respect to the thickness direction z. Hereinafter, the first reflecting portion 13 in such a state is denoted by reference numeral 13b. The second reflecting portion 14 of the optical member 1A shows a state that is not inclined (planar) with respect to the width direction (short direction) x. Hereinafter, the second reflecting portion 14 in such a state is denoted by reference numeral 14a. Show.

次に、上記導光部材1Aの大きさについて、図15に記載の符号aから符号e、符号gを用いて説明する。
なお、符号aは上記入射部11と第2反射部14aとの交点を示し、符号bは上記入射部11と曲面部12aとの交点を示し、符号cは上記曲面部12aと平面部12bとの交点を示し、符号dは上記平面部12bと第1反射部13bとの交点を示し、符号eは上記第1反射部13bと第2反射部14aとの交点を示すものである。
Next, the size of the light guide member 1A will be described using reference symbols a to e and reference symbol g shown in FIG.
In addition, the code | symbol a shows the intersection of the said incident part 11 and the 2nd reflection part 14a, the code | symbol b shows the intersection of the said incident part 11 and the curved surface part 12a, and the code | symbol c shows the said curved surface part 12a and the plane part 12b. The symbol d indicates the intersection between the plane portion 12b and the first reflecting portion 13b, and the symbol e indicates the intersection between the first reflecting portion 13b and the second reflecting portion 14a.

又、符号gは、上記平面部12bと第1反射部13bとの交点である符号dを通る、平面部12bを通る垂線jと上記第2反射部14aの延長線kとの交点を示すものである。
以上の符号aから符号e及び符号gを用いると、上記導光部材1Aの大きさは、例えば、幅方向xの寸法(図15の符号bと符号gとの間の距離)が19mm、厚さ方向zの寸法(図15の符号dと符号gとの間の距離)が9mmであり、長手方向yの寸法が70mmであり、又、導光部材1Aの入射部11の幅方向xの寸法(図15の符号aと符号bとの間の距離)は2mmとしたものである。
The symbol g indicates the intersection of the perpendicular line j passing through the plane portion 12b and the extension line k of the second reflecting portion 14a passing through the symbol d which is the intersection point of the plane portion 12b and the first reflecting portion 13b. It is.
When the above symbols a to e and g are used, the size of the light guide member 1A is, for example, a dimension in the width direction x (distance between the symbol b and the symbol g in FIG. 15) is 19 mm thick. The dimension in the length direction z (the distance between the sign d and the sign g in FIG. 15) is 9 mm, the dimension in the longitudinal direction y is 70 mm, and the width direction x of the incident portion 11 of the light guide member 1A. The dimension (distance between the symbol a and the symbol b in FIG. 15) is 2 mm.

さらに、第1反射部13bに持たせた傾斜は、厚さ方向zの寸法(図15の符合dと符号gとの間の距離)が9mmであるのに対して幅方向xの寸法(図9の符号eと符号gとの間の距離)を2mmとした傾斜角γ(約16°)を有し、かつ、導光部材本体10内部側へ傾いた傾斜であることとした。   Further, the inclination given to the first reflecting portion 13b is 9 mm in the dimension in the thickness direction z (the distance between the symbol d and the symbol g in FIG. 15), but the dimension in the width direction x (see FIG. 15). The distance between the reference sign 9 and the reference sign g) is 2 mm, and has an inclination angle γ (about 16 °) and is inclined to the inside of the light guide member body 10.

次に、上記導光部材1A内部において、上記入射部11にて導光された光がどのような光路を辿るか、図15を用いて説明する。なお、図15には光路S(破線)及び光路T(一点鎖線)の2種類の代表的な光路が示されている。   Next, it will be described with reference to FIG. 15 what optical path the light guided by the incident portion 11 follows in the light guide member 1A. FIG. 15 shows two typical optical paths, that is, an optical path S (broken line) and an optical path T (one-dot chain line).

まず、上記光路Sにおいては、上記入射部11より入射した光は、上記曲面部12aに向かい(図15の符号S1で示す光路)、上記曲面部12aで全反射され、該全反射された光は再び曲面部12aに向かい(図15の符号S2で示す光路)、再び全反射され、上記第1反射部13b・第2反射部14a・平面部12bでの反射を経た後に、上記曲面部12aへと向かう(図15の符号S3からS5で示す光路)。   First, in the optical path S, the light incident from the incident portion 11 is directed toward the curved surface portion 12a (the optical path indicated by reference numeral S1 in FIG. 15), totally reflected by the curved surface portion 12a, and the totally reflected light. Is again directed to the curved surface portion 12a (the optical path indicated by symbol S2 in FIG. 15), is totally reflected again, and after being reflected by the first reflecting portion 13b, the second reflecting portion 14a, and the flat surface portion 12b, the curved surface portion 12a. (The optical path indicated by reference signs S3 to S5 in FIG. 15).

該曲面部12aに向かう光は、上記曲面部12aで、上記入射部11から入射された光は、臨界角を下回った角度で入射するため、上記曲面部12aから上記導光部材1A外部へと屈折しつつ出射される(図15の符号S6で示す光路)。   The light traveling toward the curved surface portion 12a is the curved surface portion 12a, and the light incident from the incident portion 11 is incident at an angle less than the critical angle. Therefore, the light from the curved surface portion 12a to the outside of the light guide member 1A. The light is emitted while being refracted (the optical path indicated by S6 in FIG. 15).

次に、上記光路Tについて説明すると、上記入射部11より入射した光は上記光路Sと同様に、まず、上記曲面部12aへと向かい(図15の符号T1で示す光路)、全反射される。該全反射された光は上記第2反射部14aへと向かい(図15の符号T2で示す光路)、該第2反射部14にて反射され、該第2反射部14aにて反射された光は、上記第1反射部13bでの反射を経て(図15の符号T3で示す光路)、上記平面部12bへと向かう(図15の符号T3で示す光路)。該平面部12bに向かう光は、上記平面部で、入射角が全反射条件を下回っているため、屈折しつつ上記導光部材1A外部へと出射される(図15の符号T4で示す光路)。   Next, the optical path T will be described. As in the optical path S, the light incident from the incident part 11 first heads toward the curved surface part 12a (optical path indicated by reference numeral T1 in FIG. 15) and is totally reflected. . The totally reflected light travels toward the second reflecting portion 14a (the optical path indicated by reference numeral T2 in FIG. 15), is reflected by the second reflecting portion 14, and is reflected by the second reflecting portion 14a. Is reflected by the first reflecting portion 13b (the optical path indicated by reference numeral T3 in FIG. 15) and travels toward the flat portion 12b (optical path indicated by reference numeral T3 in FIG. 15). The light traveling toward the plane portion 12b is emitted to the outside of the light guide member 1A while being refracted because the incident angle is lower than the total reflection condition at the plane portion (the optical path indicated by reference numeral T4 in FIG. 15). .

上述の通り、上記入射部11より入射した光は上記曲面部12a及び平面部12bからなる上記出射部12の全面から出射されることになるため、上記導光部材1Aを上記出射方向w1に対して面全体で発光させることができる。   As described above, since the light incident from the incident portion 11 is emitted from the entire surface of the emission portion 12 including the curved surface portion 12a and the flat surface portion 12b, the light guide member 1A is directed to the emission direction w1. The entire surface can be illuminated.

次に、上記照明装置Y内部において、上記導光部材1Aの入射部11にて導光された光がどのような光路を辿るか、図16を用いて説明するが、上記導光部材1A内部における光路の説明と同一の部分には同一の符号を付して、その説明は省略する。なお、図16においては、破線で示す光路S、一点鎖線で示す光路Tの2種類の代表的な光路が記載されている。   Next, it will be described with reference to FIG. 16 what optical path the light guided by the incident portion 11 of the light guide member 1A follows in the illumination device Y. The same reference numerals are given to the same parts as those in the description of the optical path in FIG. In FIG. 16, two types of typical optical paths are described: an optical path S indicated by a broken line and an optical path T indicated by a one-dot chain line.

まず、上記光路Sにおいては、上記導光部材1A内部における光路の説明にて述べたように、上記入射部11より入射した光は、図16に示すように、符号S1からS5で示す光路上を経て、上記曲面部12aから出射される。   First, in the optical path S, as described in the description of the optical path inside the light guide member 1A, the light incident from the incident portion 11 is on the optical path indicated by reference numerals S1 to S5 as shown in FIG. And exits from the curved surface portion 12a.

そして、該出射された光は上記拡散部6へ向かい(図16の符号S6で示す光路)、該拡散部6にて拡散されて上記照明装置Yが発光する。
次に、上記光路Tにおいても、上記導光部材1における光路の説明にて述べたように、図16の符号T1からT4で示す光路上を経て、上記平面部12bより出射され、該出射された光が上記拡散部6にて拡散されて上記光源装置Yが発光する。
The emitted light travels toward the diffusion unit 6 (optical path indicated by reference numeral S6 in FIG. 16) and is diffused by the diffusion unit 6 so that the illumination device Y emits light.
Next, also in the optical path T, as described in the description of the optical path in the light guide member 1, the light is emitted from the planar portion 12b through the optical path indicated by reference numerals T1 to T4 in FIG. The diffused light is diffused by the diffusion unit 6 and the light source device Y emits light.

従って、入射部11より導光部材1A内に導光された光は、図16に示す光路S(破線)及び光路T(一点鎖線)に代表されるように、曲面部12a及び平面部12bより出射し、拡散部6に入射するため、出射方向w1に対して面全体で発光する照明装置Yを実現できる。   Therefore, the light guided from the incident portion 11 into the light guide member 1A is represented by the curved surface portion 12a and the flat surface portion 12b, as represented by the optical path S (broken line) and the optical path T (dashed line) shown in FIG. Since it is emitted and incident on the diffusing unit 6, the illumination device Y that emits light over the entire surface in the emission direction w1 can be realized.

上述の通り、上記照明装置Yは、上記導光部材の曲面部12aは、該曲面部12aにて全反射された光が上記第1反射部13b及び/若しくは第2反射部14aにおいて反射され、再び曲面部12aに入射し、該入射した光のうち全反射条件を満たさない光が上記曲面部12aから出射されるため、上記導光部材1Aに入射した光は、上記平面部12bだけでなく上記曲面部12aからも出射される、つまりは、上記出射部12の全面から出射されることとなり、さらに、該出射された光が上記拡散部6の全面に入射し、該拡散部6にて拡散されることで、出射方向w1に対して、単体で、面全体で均一に発光する照明装置Yが実現できる。   As described above, in the lighting device Y, the curved surface portion 12a of the light guide member reflects light totally reflected by the curved surface portion 12a at the first reflecting portion 13b and / or the second reflecting portion 14a. Since the light that is incident on the curved surface portion 12a again and does not satisfy the total reflection condition out of the incident light is emitted from the curved surface portion 12a, the light incident on the light guide member 1A is not only the flat surface portion 12b. The light is also emitted from the curved surface portion 12 a, that is, emitted from the entire surface of the emission portion 12, and the emitted light is incident on the entire surface of the diffusion portion 6. By diffusing, it is possible to realize an illumination device Y that emits light uniformly over the entire surface in the emission direction w1.

なお、上記実施の形態1で用いた導光部材1においては、第1反射部13aは厚さ方向zに対して平行で、第2反射部14bは幅方向xに対して傾斜を有する場合を例に挙げ、又、上記実施の形態2で用いた導光部材1Aにおいては、第1反射部13bは厚さ方向zに対して傾斜を有し、第2反射部14aは幅方向xに対して平行である場合を例に挙げたが、例えば、厚さ方向zに対して平行な第1反射部13aと幅方向に対して平行な第2反射部14aとから導光部材を構成しても良く、又、厚さ方向zに対して傾斜を有する第1反射部13bと幅方向に対して傾斜を有する第2反射部14bとから導光部材を構成しても良い。   In the light guide member 1 used in the first embodiment, the first reflecting portion 13a is parallel to the thickness direction z, and the second reflecting portion 14b is inclined with respect to the width direction x. For example, in the light guide member 1A used in the second embodiment, the first reflecting portion 13b has an inclination with respect to the thickness direction z, and the second reflecting portion 14a has an inclination with respect to the width direction x. For example, a light guide member is constituted by a first reflecting portion 13a parallel to the thickness direction z and a second reflecting portion 14a parallel to the width direction. Alternatively, the light guide member may be configured by the first reflecting portion 13b having an inclination with respect to the thickness direction z and the second reflecting portion 14b having an inclination with respect to the width direction.

いずれの場合も、第1反射部13及び第2反射部14の傾斜角の大きさや拡散の程度を適宜調節することにより、全面で出射する導光部材を実現することができる。
又、上記実施の形態1及び実施の形態2のいずれにおいても、照明装置X及び照明装置Yは筐体5内部に回路部7を有する構成としたが、これに限るものではなく、外部に回路部7を設けても良い。例えば、スタンド型照明に用いる場合、回路部7を筐体5外部のスタンド本体側に設けることも可能である。
In any case, a light guide member that emits light over the entire surface can be realized by appropriately adjusting the inclination angle and the degree of diffusion of the first reflecting portion 13 and the second reflecting portion 14.
In both of the first embodiment and the second embodiment, the lighting device X and the lighting device Y have the circuit unit 7 inside the housing 5. However, the present invention is not limited to this. The part 7 may be provided. For example, when used for stand-type illumination, the circuit unit 7 can be provided on the stand body side outside the housing 5.

(実施の形態3)
次に、本発明の照明装置の他の実施の形態について、現状の電球型の灯具に装着可能な照明装置に実施した場合について、図17及び図18を用いて説明する。
図17及び図18に示す照明装置Zは、上記実施の形態1で説明した導光部材1である導光部材1a及び導光部材1bと光源2a及び光源2bと回路部7とを収容する出射方向w1での平面正方形状で、出射方向w1に開口を有する筐体55と、現状の電球用の灯具のソケット(図示せず)に装着可能な口金93と、光源2から発生する熱を逃がすための放熱フィン8と、上記導光部材1から出射される光を拡散する拡散部6とを備えてなるものである。
(Embodiment 3)
Next, another embodiment of the lighting device according to the present invention will be described with reference to FIGS. 17 and 18 in the case where the lighting device is mounted on a current light bulb type lamp.
The illumination device Z shown in FIGS. 17 and 18 emits light that contains the light guide member 1a and the light guide member 1b, the light source 2a, the light source 2b, and the circuit unit 7 that are the light guide member 1 described in the first embodiment. A case 55 having a planar square shape in the direction w1 and having an opening in the emission direction w1, a base 93 that can be mounted on a socket (not shown) of a lamp for a current light bulb, and heat generated from the light source 2 is released. The heat radiating fins 8 are provided, and the diffusion part 6 that diffuses the light emitted from the light guide member 1 is provided.

又、上記筐体55内部には対向する二つの側壁56、57にLEDチップ21a及びLEDチップ21bを設けるための段差560及び段差570が夫々設けられ、又、上記導光部材1a及び導光部材1bが、入射部11a及び入射部11bが上記LEDチップ21a及びLEDチップ21bに夫々当接するように、設けられている。   Further, a step 560 and a step 570 for providing the LED chip 21a and the LED chip 21b are provided on the two opposite side walls 56 and 57 inside the casing 55, respectively, and the light guide member 1a and the light guide member are provided. 1b is provided such that the incident portion 11a and the incident portion 11b are in contact with the LED chip 21a and the LED chip 21b, respectively.

なお、上記二つの導光部材1上記第1反射部13a、第1反射部13b間には、両面に反射・拡散性を有する反射シート16が上記導光部材1a及び1b間に挿まれるように、貼着されている。   In addition, between the said 2 light guide member 1 said 1st reflection part 13a, the 1st reflection part 13b, the reflective sheet 16 which has reflection and a diffusivity on both surfaces is inserted between the said light guide members 1a and 1b. Is attached.

以上の構成において、上記光源2a及び光源2bからの光は上記導光部材1a及び導光部材1bの入射部11a及び入射部11bより夫々導光され、上記導光部材1a及び導光部材1b内にて全反射を含む複数回の反射を経て、上記導光部材1a及び導光部材1bの全面から夫々出射され、該出射された光は上記拡散部6に入射し、該拡散部6にて拡散されることにより、上記照明装置Zを出射方向w1に対して全面で発光させることができる。
なお、上記の場合においても、上記照明装置Zは光源が視認しにくく、かつ、上記出射方向w1に対して面全体で発光することが可能である。
In the above configuration, the light from the light source 2a and the light source 2b is guided from the incident portion 11a and the incident portion 11b of the light guide member 1a and the light guide member 1b, respectively, and in the light guide member 1a and the light guide member 1b. The light is emitted from the entire surface of the light guide member 1a and the light guide member 1b after being subjected to a plurality of reflections including total reflection, and the emitted light is incident on the diffusing unit 6. By diffusing, the illumination device Z can emit light over the entire surface in the emission direction w1.
Even in the above case, the illumination device Z is difficult to visually recognize the light source, and can emit light over the entire surface in the emission direction w1.

又、上記照明装置Zは、実施の形態1にて説明した導光部材1を備えた場合を例にして説明したが、これに限るものではなく、実施の形態2にて説明した導光部材1Aを二つ備えても良く、上記の例に限定されるものではない。この場合においても、出射方向w1に対して全面で発光する照明装置Zの実現が可能である。   Moreover, although the said illuminating device Z demonstrated as an example the case provided with the light guide member 1 demonstrated in Embodiment 1, it is not restricted to this, The light guide member demonstrated in Embodiment 2 Two 1A may be provided, and is not limited to the above example. Even in this case, it is possible to realize the illumination device Z that emits light over the entire surface in the emission direction w1.

本発明の照明装置の実施の形態の外観を示す斜視図である。It is a perspective view which shows the external appearance of embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態を示す要部分解斜視図である。It is a principal part disassembled perspective view which shows embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態を示す概略構成図である。It is a schematic block diagram which shows embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態に用いる導光部材を示す概略構成図である。It is a schematic block diagram which shows the light guide member used for embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態に用いる導光部材を示す要部分解斜視図である。It is a principal part disassembled perspective view which shows the light guide member used for embodiment of the illuminating device of this invention. 図2の導光部材の曲面部(成形部)の形状を説明するための要部拡大説明図である。It is a principal part enlarged explanatory view for demonstrating the shape of the curved surface part (forming part) of the light guide member of FIG. 本発明の照明装置の実施の形態に用いる導光部材の光路を説明するための説明図である。It is explanatory drawing for demonstrating the optical path of the light guide member used for embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態の光路を説明するための説明図である。It is explanatory drawing for demonstrating the optical path of embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態の電気回路図である。It is an electric circuit diagram of an embodiment of a lighting device of the present invention. 本発明の照明装置の実施の形態の光路のシミュレーション結果に基づく説明図である。It is explanatory drawing based on the simulation result of the optical path of embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態の光路のシミュレーション結果に基づく説明図である。It is explanatory drawing based on the simulation result of the optical path of embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態により出射される光の均一度のシミュレーション結果に基づく説明図である。It is explanatory drawing based on the simulation result of the uniformity of the light radiate | emitted by embodiment of the illuminating device of this invention. 本発明の照明装置の実施の形態に用いるもう一つの反射部の他の形態を示す概略構成図である。It is a schematic block diagram which shows the other form of another reflection part used for embodiment of the illuminating device of this invention. 本発明の照明装置の他の実施の形態を示す概略構成図である。It is a schematic block diagram which shows other embodiment of the illuminating device of this invention. 本発明の照明装置の他の実施の形態に用いる導光部材の光路を説明するための説明図である。It is explanatory drawing for demonstrating the optical path of the light guide member used for other embodiment of the illuminating device of this invention. 本発明の照明装置の他の実施の形態の光路を説明するための説明図である。It is explanatory drawing for demonstrating the optical path of other embodiment of the illuminating device of this invention. 本発明の照明装置のもう一つの他の実施の形態を示す概略構成図である。It is a schematic block diagram which shows another other embodiment of the illuminating device of this invention. (a)は図17の照明装置の概略上面図であり、(b)は図15の照明装置の拡散部及び導光部材を外した場合の概略上面図である。(A) is a schematic top view of the illuminating device of FIG. 17, (b) is a schematic top view when the diffusion part and the light guide member of the illuminating device of FIG. 15 are removed. 従来の面発光装置の構成を示す部分拡大断面図である。It is a partial expanded sectional view which shows the structure of the conventional surface emitting apparatus.

符号の説明Explanation of symbols

1 導光部材
1A 導光部材
1a 導光部材
1b 導光部材
2 光源
2a 光源
2b 光源
5 筐体
6 拡散部
11 入射部
11a 入射部
11b 入射部
12 出射部
12a 曲面部(成形部)
12b 平面部
13 第1反射部(反射部)
13a 第1反射部(反射部)
13b 第1反射部(反射部)
14 第2反射部(反射部)
14a 第2反射部(反射部)
14b 第2反射部(反射部)
31 第1の光路
32 第2の光路
510 第1外部反射部(もう一つの反射部)
511 第2外部反射部(もう一つの反射部)
512 外部反射部(もう一つの反射部)
55 筐体
X 照明装置
Y 照明装置
Z 照明装置
DESCRIPTION OF SYMBOLS 1 Light guide member 1A Light guide member 1a Light guide member 1b Light guide member 2 Light source 2a Light source 2b Light source 5 Case 6 Diffusion part 11 Incidence part 11a Incident part 11b Incident part 12 Output part 12a Curved part (molding part)
12b Plane portion 13 First reflection portion (reflection portion)
13a 1st reflection part (reflection part)
13b 1st reflection part (reflection part)
14 Second reflection part (reflection part)
14a Second reflection part (reflection part)
14b 2nd reflection part (reflection part)
31 1st optical path 32 2nd optical path 510 1st external reflection part (another reflection part)
511 Second external reflection part (another reflection part)
512 External reflector (another reflector)
55 Housing X Lighting device Y Lighting device Z Lighting device

Claims (5)

光源からの光を入射部から導光して出射部の全面より出射し、導光される光の入射方向と出射される光の出射方向が同方向である導光部材を備えた照明装置において、
底壁を有し、該底壁に対向して前記導光部材が装着された筐体を備え、
前記底壁の内側に段差を設け、
該段差の一方の段には、前記光源からの光が前記入射部から導光するように該光源を設けてあり、
前記段差の他方の段には、前記筐体及び前記導光部材により形成された空間に収容され、前記光源を駆動する回路部を設けてあることを特徴とする照明装置。
The light from the light source is guided from the incident portion is emitted from the entire surface of the emitting portion, the lighting apparatus emitting direction of the light with a light guide member in the same direction emitted to the incident direction of the light guide light being ,
A housing having a bottom wall and mounted with the light guide member facing the bottom wall;
Providing a step inside the bottom wall;
One of the steps is provided with the light source so that light from the light source is guided from the incident portion,
The lighting device according to claim 1, wherein a circuit portion that is housed in a space formed by the housing and the light guide member and drives the light source is provided in the other step.
前記導光部材の厚みは、The thickness of the light guide member is
前記入射部から離れるに従って減じるようにしてあることを特徴とする請求項1に記載の照明装置。The illumination device according to claim 1, wherein the illumination device decreases as the distance from the incident portion increases.
前記導光部材の一端側が前記入射部であり、One end side of the light guide member is the incident portion,
前記光源は、The light source is
前記入射部に当接すべく、前記導光部材の片側のみに配設されていることを特徴とする請求項1又は請求項2に記載の照明装置。The lighting device according to claim 1, wherein the lighting device is disposed only on one side of the light guide member so as to contact the incident portion.
前記導光部材を2つ備え、Two light guide members are provided,
前記筐体の内部に対向させて2つの光源を配設してあり、Two light sources are arranged facing the inside of the housing,
前記導光部材それぞれは、Each of the light guide members
前記光源の夫々に前記入射部を当接してあり、The incident portion is in contact with each of the light sources;
2つの導光部材の間に反射シートが挿まれてなることを特徴とする請求項1から請求項3の何れか1つに記載の照明装置。The lighting device according to any one of claims 1 to 3, wherein a reflection sheet is inserted between the two light guide members.
前記導光部材は、
前記入射部から入射した光を導光して全反射させる曲面部と、
該曲面部で全反射した光をさらに反射させる反射部と
を備え、
該反射部で反射した光を前記曲面部を含む前記出射部の全面から出射させることを特徴とする請求項1から請求項4の何れか1つに記載の照明装置
The light guide member is
A curved surface part for guiding and totally reflecting light incident from the incident part;
A reflecting portion for further reflecting light totally reflected by the curved surface portion;
With
5. The illumination device according to claim 1, wherein the light reflected by the reflecting portion is emitted from the entire surface of the emitting portion including the curved surface portion .
JP2007190009A 2007-07-20 2007-07-20 Lighting device Expired - Fee Related JP4841513B2 (en)

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