JP2007171705A - Surface light source device - Google Patents

Surface light source device Download PDF

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JP2007171705A
JP2007171705A JP2005371177A JP2005371177A JP2007171705A JP 2007171705 A JP2007171705 A JP 2007171705A JP 2005371177 A JP2005371177 A JP 2005371177A JP 2005371177 A JP2005371177 A JP 2005371177A JP 2007171705 A JP2007171705 A JP 2007171705A
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light
light guide
light source
circuit board
source device
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JP2005371177A
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JP4821018B2 (en
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Tatsu Tsuchida
達 土田
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface light source device where a photo conductive member can be fixed and held with sufficiently satisfactory fitting strength. <P>SOLUTION: The surface light source device comprises a circuit board 2, a light source 1, the photo conductive member 3, and a holder 7. The holder 7 has a positioning lock part 8 for positioning and holding the photo conductive member 3 and an engagement member 9 provided with an engagement claw 9B for fixing the photo conductive member 3 to prevent falling. The photo conductive member 3 has an engagement part 10 disposed and restricted by the positioning lock part 8, and a contact part 11 for stopping the photo conductive member 3 from oscillating is provided opposite to the circuit board 2. Consequently, while the engagement part 10 provided to the photo conductive member 3 is disposed and held at the positioning lock part 8 provided to the holder 7, the engagement member 9 provided to the holder 7 can holds the photo conductive member 3 to prevent falling, and the contact part 11 provided to the photo conductive member 3 is arranged oppositely in contact with the circuit board 2 to stop the photo conductive member 3 from oscillating. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、光源からの照射光線を導光体に導き入れ、その導光体を介して表示媒体などを透過照明したり、照明表示する導光体を用いた面光源装置に関するものである。   The present invention relates to a surface light source device using a light guide that guides irradiation light from a light source into a light guide and transmits and illuminates a display medium or the like through the light guide.

従来、光源から照射される光線を導光体内に導き入れ、その導光体に導光案内された光線を導光体の外部側へと射出して表示媒体などを面発光するようにした導光体を用いた面光源装置としては、たとえば本願出願人が特許文献１として先に提案している。この特許文献１による導光体を用いた面光源装置（表示装置）としては、基板上に取り付けられた光源と同列状にして導光体を配設し、その導光体の射出部分と対向して表示板を配設し、前記光源からの照射光線を導光体に導き入れ、その前面側に配設した表示板を透過照明あるいは照明表示するように構成している。
特開平９−１８５３３６号公報 Conventionally, a light beam emitted from a light source is introduced into a light guide body, and the light beam guided to the light guide body is emitted to the outside of the light guide body to emit light on a display medium or the like. As a surface light source device using a light body, for example, the applicant of the present application previously proposed as Patent Document 1. As a surface light source device (display device) using a light guide according to Patent Document 1, a light guide is arranged in the same row as a light source mounted on a substrate, and is opposed to an emission part of the light guide. Then, a display plate is provided, the irradiation light from the light source is introduced into the light guide, and the display plate provided on the front side thereof is configured to transmit or display illumination.
JP-A-9-185336

ところで、上述したように従来例の構造にあっては、組み付ける寸法に余裕があったり、あるいは光源の位置を基準としてケース（ホルダー），導光体，表示板と順次積層状態に組み付けることができるため、導光体の固定保持する手段として簡単に嵌め込み固定することができるというメリットがある。しかしながら、場合によっては組み付けスペースが限られ、基板（回路基板）に取り付けられる光源からの照射光線を導光体を介して直交する方向に導き入れ、その直交方向に導かれた光線を導光体の外部側へと射出して表示媒体たとえば表示板や透光性基板を照明表示するようにしなければならないことがある。その一例として図４を用いて説明する。図４に示す構成では、光源である発光ダイオード１が回路基板２上に取り付け固定されており、光源である発光ダイオード１と対峙して導光体３が配置されている。この場合、導光体３には光源である発光ダイオード１からの照射光線を受け入れる受光部４と、この受光部４によって導光案内された入射光線を前記回路基板２と平行方向に反射導光する反射部５と、この反射部５を介して導光案内された光線を外部への導き出す射出部６とを備えて構成している。この際、導光体３の射出部６から照射された光線を表示媒体Ｈである表示板や透光性基板の背後から照明表示（透過照明）して照らし出すように構成している。また導光体３は合成樹脂製のホルダー７を介して回路基板２の所定の位置に配置されているが、従来例の装置構造にあっては、仕様条件によっては振動雰囲気中に使用することがある。このため、振動によって軋み音が発生する虞もあるため、導光体３を強固に固定保持する必要がある。これを達成するために導光体３を固定保持する手段として、たとえば、ホルダー７に圧入ピン７Ａなどを設けて導光体３に設けた挿入孔（図示せず）に挿通して保持したり、ホルダー７の圧入ピン７Ａに挿通保持した後に、圧入ピン７Ａの先端部分を熱溶着することによってホルダー７に対して導光体３を強固に固定保持するようにしている。しかしながら、圧入ピン７Ａに単に導光体３を圧入保持タイプでは不安定であり、また圧入ピン７Ａを熱溶着にて固定保持してしまうと部品交換の交換作業が煩わしいものとなってしまうという問題がある。またこの点、組み付け作業性を考慮するものとして係止用の爪部を設けて係合固定することも考えられるが抜け止め保持することはできるものの横方向への押さえが良好に行えず横振れを起こしてしまいやすいという問題がある。   By the way, in the structure of the conventional example as described above, there is a margin for assembling, or the case (holder), the light guide, and the display board can be sequentially assembled in a stacked state based on the position of the light source. Therefore, there is an advantage that the light guide can be easily fitted and fixed as a means for fixing and holding the light guide. However, in some cases, the assembly space is limited, and the irradiation light from the light source attached to the board (circuit board) is guided in a direction orthogonal to the light guide, and the light guided in the orthogonal direction is guided to the light guide. In some cases, it is necessary to illuminate and display a display medium such as a display plate or a translucent substrate. An example thereof will be described with reference to FIG. In the configuration shown in FIG. 4, a light emitting diode 1 as a light source is attached and fixed on a circuit board 2, and a light guide 3 is disposed so as to face the light emitting diode 1 as a light source. In this case, the light guide 3 receives light irradiated from the light emitting diode 1 as a light source, and the incident light guided by the light receiving unit 4 is reflected and guided in a direction parallel to the circuit board 2. And a light emitting and guiding unit 6 that guides the light guided through the reflecting unit 5 to the outside. At this time, the light beam emitted from the emitting portion 6 of the light guide 3 is illuminated and displayed from behind the display plate or the translucent substrate as the display medium H. The light guide 3 is disposed at a predetermined position on the circuit board 2 via a synthetic resin holder 7, but the conventional device structure may be used in a vibrating atmosphere depending on the specification conditions. There is. For this reason, there is a possibility that a squeaking noise may be generated by vibration, so that the light guide 3 needs to be firmly fixed and held. In order to achieve this, as a means for fixing and holding the light guide 3, for example, a press-fit pin 7 </ b> A or the like is provided in the holder 7 and inserted through an insertion hole (not shown) provided in the light guide 3. After inserting and holding the press-fit pin 7A of the holder 7, the tip portion of the press-fit pin 7A is thermally welded so that the light guide 3 is firmly fixed and held to the holder 7. However, it is unstable if the light guide 3 is simply press-fitted and held on the press-fit pin 7A, and if the press-fit pin 7A is fixed and held by thermal welding, the replacement work for parts replacement becomes troublesome. There is. In consideration of the assembly workability, it may be possible to provide a locking claw to fix the engagement. There is a problem that it is easy to cause.

そこで本発明は、前述の課題に対して対処するため、導光体を用いた面光源装置において、導光体の取付強度を充分満足することができるように固定保持することのできる面光源装置を提供することを目的とする。   Therefore, in order to address the above-described problems, the present invention provides a surface light source device that can be fixedly held so that the mounting strength of the light guide can be sufficiently satisfied in the surface light source device using the light guide. The purpose is to provide.

本発明は、前述した課題を解決するため、請求項１では、硬質材料からなる回路基板と、この回路基板に取り付けられる光源と、この光源からの照射光線を受け入れる受光部と、この受光部によって導光案内された入射光線を前記回路基板と平行方向に反射導光する反射部と、この反射部を介して導光案内された光線を外部への導き出す射出部とを備えた透光性材料からなる合成樹脂製の導光体と、この導光体を前記回路基板の所定位置に配置し支承保持する合成樹脂製のホルダーと、からなる面光源装置において、前記ホルダーには前記導光体を位置決め保持するための位置決め用係止部を形成するとともに、前記導光体を抜け止め固定するための係合爪を設けた係合部材を形成し、前記導光体には前記位置決め用係止部に位置決め規制される係合部を形成するとともに、前記導光体の振れ止めのための突き当て部を前記回路基板と対峙して設けてなることを特徴とする面光源装置である。   In order to solve the above-described problem, the present invention provides a circuit board made of a hard material, a light source attached to the circuit board, a light receiving unit that receives irradiation light from the light source, and a light receiving unit. A translucent material provided with a reflection part that reflects and guides the incident light beam guided and guided in a direction parallel to the circuit board, and an emission part that guides the light beam guided and guided through the reflection part to the outside A synthetic resin light guide, and a synthetic resin holder that holds the light guide at a predetermined position of the circuit board and supports the light guide. And an engaging member provided with an engaging claw for retaining and fixing the light guide. The engaging member for positioning is formed on the light guide. Positioning restricted at stop To form a Rukakarigo unit, a surface light source device characterized by comprising providing to face with the circuit board contact portion for steadying of the light guide.

また請求項２では、請求項１に記載の面光源装置において、前記導光体に形成した前記係合部の長手方向と前記突き当て部の長手方向とをほぼ直交方向に設定してなることを特徴とするものである。   According to a second aspect of the present invention, in the surface light source device according to the first aspect, the longitudinal direction of the engaging portion formed in the light guide and the longitudinal direction of the abutting portion are set substantially orthogonal to each other. It is characterized by.

また請求項３では、請求項１または請求項２に記載の面光源装置において、前記導光体に設けた前記受光部の形状を前記光源位置を基準として円弧状に設定してなることを特徴とするものである。   According to a third aspect of the present invention, in the surface light source device according to the first or second aspect, the shape of the light receiving portion provided in the light guide is set in an arc shape with respect to the light source position. It is what.

また請求項４では、請求項１から請求項３のいずれか１項に記載の面光源装置において、前記導光体の射出部と対向して照明表示するための表示媒体を配設してなることを特徴とするものである。   According to a fourth aspect of the present invention, in the surface light source device according to any one of the first to third aspects of the present invention, a display medium for illuminating and displaying is disposed opposite to the emission part of the light guide. It is characterized by this.

本発明では、回路基板と、光源と、導光体と、ホルダーと、からなる面光源装置において、前記ホルダーには前記導光体を位置決め保持するための位置決め用係止部を形成するとともに、前記導光体を抜け止め固定するための係合爪を設けた係合部材を形成し、前記導光体には前記位置決め用係止部に位置決め規制される係合部を形成するとともに、前記導光体の振れ止めのための突き当て部を前記回路基板と対峙して設けてなることにより、前記ホルダーに設けた位置決め用係止部に導光体に設けた係合部を位置決め保持しつつ、ホルダーに設けた係合部材によって導光体を抜け止め保持することができ、しかも導光体に設けた突き当て部を回路基板に対峙して突き当て配置することにより導光体の振れ止めを行うことができる。従って、ホルダーに対して前記導光体をセットすることにより前記ホルダーの係合部材に設けた前記係合爪によって前記導光体を簡単に係合保持することができるとともに、導光体の振れ止めのための突き当て部を前記回路基板と対峙して設けてなることにより、振れ止め保持することができるものであり、導光体の取付強度を充分満足することができるように固定保持することのできる面光源装置を提供することができ、これにより初期の目的を達成することができる。   In the present invention, in the surface light source device composed of a circuit board, a light source, a light guide, and a holder, the holder is formed with a positioning locking portion for positioning and holding the light guide, An engaging member provided with an engaging claw for preventing and fixing the light guide is formed, and the light guide is provided with an engaging portion that is positioned and regulated by the positioning locking portion. By positioning an abutting portion for stabilizing the light guide to face the circuit board, the engaging portion provided on the light guide is positioned and held on the positioning locking portion provided on the holder. On the other hand, the light guide can be held and held by the engaging member provided on the holder, and the abutment provided on the light guide is placed against the circuit board. Stop can be done. Therefore, by setting the light guide to the holder, the light guide can be easily engaged and held by the engaging claws provided on the engaging member of the holder, and the light guide can be shaken. By providing an abutment portion for stopping against the circuit board, it is possible to hold it steady and hold it so that the mounting strength of the light guide can be sufficiently satisfied. It is possible to provide a surface light source device that can perform the initial purpose.

本発明の請求項１では、硬質材料からなる回路基板と、この回路基板に取り付けられる光源と、この光源からの照射光線を受け入れる受光部と、この受光部によって導光案内された入射光線を前記回路基板と平行方向に反射導光する反射部と、この反射部を介して導光案内された光線を外部への導き出す射出部とを備えた透光性材料からなる合成樹脂製の導光体と、この導光体を前記回路基板の所定位置に配置し支承保持する合成樹脂製のホルダーと、からなる面光源装置において、前記ホルダーには前記導光体を位置決め保持するための位置決め用係止部を形成するとともに、前記導光体を抜け止め固定するための係合爪を設けた係合部材を形成し、前記導光体には前記位置決め用係止部に位置決め規制される係合部を形成するとともに、前記導光体の振れ止めのための突き当て部を前記回路基板と対峙して設けてなることを特徴とする面光源装置である。このように構成することによって、前記ホルダーに設けた位置決め用係止部に導光体に設けた係合部を位置決め保持しつつ、ホルダーに設けた係合部材によって導光体を抜け止め保持することができ、しかも導光体に設けた突き当て部を回路基板に対峙して突き当て配置することにより導光体の振れ止めを行うことができる。この際、ホルダーを基準として導光体を簡単に組み付けることができるため、組み付け作業効率も高めることができるとともに、面光源装置全体の小型化や実装密度を高めることのできる面光源装置を提供することができる。   According to claim 1 of the present invention, a circuit board made of a hard material, a light source attached to the circuit board, a light receiving part that receives an irradiation light beam from the light source, and an incident light beam guided and guided by the light receiving part A synthetic resin light guide made of a translucent material, comprising a reflection part that reflects and guides light in a direction parallel to the circuit board, and an emission part that guides the light guided through the reflection part to the outside. And a synthetic resin holder that holds and supports the light guide at a predetermined position on the circuit board, and a positioning member for positioning and holding the light guide in the holder. The engaging member is provided with an engaging claw for forming a locking portion and fixing the light guide to prevent the light guide from coming off, and the light guide is engaged by the positioning locking portion. Forming the part, A surface light source device characterized by the abutment portion formed by providing to face with the circuit board for the steadying Kishirube light body. With this configuration, the light guide is retained by the engagement member provided in the holder while the engagement portion provided in the light guide is positioned and held in the positioning locking portion provided in the holder. In addition, the light guide can be prevented from shaking by placing the abutting portion provided on the light guide against the circuit board. In this case, since the light guide can be easily assembled on the basis of the holder, it is possible to improve the assembly work efficiency, and provide a surface light source device that can reduce the overall size of the surface light source device and increase the mounting density. be able to.

また、前記導光体に形成した前記係合部の長手方向と前記突き当て部の長手方向とをほぼ直交方向に設定してなることにより、上下方向と横方向の動きを拘束することができるものであり、導光体の振れ止めを良好に行うことができ、導光体の取付強度を充分満足することができるという効果がある。（請求項２）   In addition, by setting the longitudinal direction of the engaging portion formed on the light guide and the longitudinal direction of the abutting portion to be substantially orthogonal, it is possible to restrain the vertical and lateral movements. Therefore, the light guide can be satisfactorily prevented and the mounting strength of the light guide can be sufficiently satisfied. (Claim 2)

また、前記導光体に設けた前記受光部の形状を前記光源位置を基準として円弧状に設定してなることにより、光源からの照射光線を円弧状に設定してなる受光部によって放射状に導光体の内部へと照射光線を導光案内することができ、これにより広範囲に渡って導光体内部に平均した光線を導き入れることができ、平均した照明効果を得ることが可能となる面光源装置を提供することができる。（請求項３）   In addition, by setting the shape of the light receiving portion provided in the light guide to an arc shape with respect to the light source position, the light beam emitted from the light source is guided radially by the light receiving portion set in an arc shape. The light beam can be guided and guided to the inside of the light body, whereby the average light beam can be introduced into the light guide body over a wide range, and an average lighting effect can be obtained. A light source device can be provided. (Claim 3)

また、前記導光体の射出部と対向して照明表示するための表示媒体を配設してなることにより、表示媒体の表示面全体を射出部からの照射光線によってほぼ均一的に照明表示することができる。   Further, by providing a display medium for illuminating and displaying the light guide opposite to the emission part of the light guide, the entire display surface of the display medium is illuminated and displayed almost uniformly by irradiation light from the emission part. be able to.

以下、本発明の面光源装置を車両用の指示計器の表示装置に適用した実施例に基づいて説明する。   Hereinafter, the surface light source device of the present invention will be described based on an embodiment in which the surface light source device is applied to a display device for an indicating instrument for a vehicle.

本発明の面光源装置として、その第１実施例を図１から図３に示す。従来例と同一部分及び均等部分については同一符号を付して説明する。同図において、光源である発光ダイオード１が回路基板２上に横一列状態にして並べて取り付け固定され、この光源である発光ダイオード１と対峙して導光体３が配置されている。   A first embodiment of the surface light source device of the present invention is shown in FIGS. The same parts as those in the conventional example and the equivalent parts will be described with the same reference numerals. In the figure, light-emitting diodes 1 as light sources are mounted and fixed in a horizontal row on a circuit board 2, and a light guide 3 is disposed facing the light-emitting diodes 1 as light sources.

また導光体３には、光源である発光ダイオード１からの照射光線を受け入れる受光部４と、この受光部４によって導光案内された入射光線を前記回路基板２と平行方向に反射導光する反射部５と、この反射部５を介して導光案内された光線を外部への導き出す射出部６とを備えて構成している。この際、導光体３の射出部６から照射された光線を表示媒体Ｈである透光性の表示板の背後から照明表示（透過照明）して表示板を照らし出すように構成している。   Further, the light guide 3 receives and receives light irradiated from the light emitting diode 1 as a light source, and reflects and guides incident light guided by the light receiving unit 4 in a direction parallel to the circuit board 2. The reflection unit 5 and an emission unit 6 that guides the light guided through the reflection unit 5 to the outside are provided. At this time, the light emitted from the light emitting portion 6 of the light guide 3 is illuminated from the back of the translucent display plate that is the display medium H (transmission illumination) to illuminate the display plate. .

また導光体３は合成樹脂製のホルダー７を介して回路基板２の所定の位置に配置されるように設定されるが、この実施例ではホルダー７自体は回路基板２に固定保持されるように構成されている。   The light guide 3 is set so as to be disposed at a predetermined position on the circuit board 2 through a synthetic resin holder 7, but in this embodiment, the holder 7 itself is fixedly held on the circuit board 2. It is configured.

この場合、ホルダー７に対して導光体３を固定保持する手段として、ホルダー７には、導光体３を位置決め保持するための係止用孔部からなる位置決め用係止部８が形成されるとともに、導光体３を抜け止め固定するために導光体３の両側端個所にそれぞれ係合する弾性腕片９Ａの先端部に係合爪９Ｂを備えた係合部材９が形成されている。また導光体３には、ホルダー７の位置決め用係止部８（係止用孔部）に差し込んで位置決め規制する位置決めピンからなる係合部１０が一体に形成されるとともに、導光体３の受光部４位置から逸れた個所に振れ止めのための突き当て部１１が回路基板２の表面に向けて対峙するように突き出し形成されている。   In this case, as a means for fixing and holding the light guide 3 with respect to the holder 7, the holder 7 is formed with a positioning locking portion 8 including a locking hole for positioning and holding the light guide 3. At the same time, an engaging member 9 having an engaging claw 9B is formed at the tip of each elastic arm piece 9A that engages with both side end portions of the light guide 3 in order to prevent the light guide 3 from coming off. Yes. In addition, the light guide 3 is integrally formed with an engaging portion 10 including a positioning pin that is inserted into the positioning locking portion 8 (locking hole) of the holder 7 to restrict positioning, and the light guide 3 An abutting portion 11 for steadying is projected and formed at a location deviating from the position of the light receiving portion 4 so as to face the surface of the circuit board 2.

また第１実施例においては、導光体３に形成した係合ピンからなる係合部１０の長手方向と、突き当て部１１の突き出し形成される長手方向とがほぼ直交方向となるように設けられている。   Further, in the first embodiment, the longitudinal direction of the engaging portion 10 formed of the engaging pin formed on the light guide 3 and the longitudinal direction in which the abutting portion 11 protrudes are substantially orthogonal to each other. It has been.

なお、導光体３に設けた受光部４の形状を光源である発光ダイオード１位置を基準として円弧状に設定してなることにより、光源（発光ダイオード１）からの照射光線を円弧状に設定してなる受光部４によって放射状に導光体３の内部へと照射光線を導光案内することができるように構成している。これにより広範囲に渡って導光体３内部に平均した光線を導き入れることができ、平均した照明効果を得ることが可能となるようにしている。   In addition, by setting the shape of the light receiving portion 4 provided in the light guide 3 to an arc shape with respect to the position of the light emitting diode 1 as a light source, the irradiation light from the light source (light emitting diode 1) is set to an arc shape. The light receiving unit 4 is configured to guide and guide the irradiated light beam radially into the light guide 3. As a result, the average light beam can be introduced into the light guide 3 over a wide range, and an average illumination effect can be obtained.

上記構成からなる第１実施例においては、枠状のホルダー７を基準として回路基板２の板面方向に沿って導光体３をセットして押し込むことにより、ホルダー７に設けた係止用孔部からなる位置決め用係止部８に、導光体３に設けた位置決めピンからなる係合部１０が差し込まれて位置決め規制される。これとほぼ同時に導光体３の両側端個所にそれぞれ係合するホルダー７に設けた係合部材９の係合爪９Ｂによって簡単に係合保持することにより、導光体３が抜け止め保持することができる。この際、導光体３に設けた突き当て部１１を回路基板２に対峙して突き当て配置することにより導光体３の振れ止めを行うことができる。すなわち、導光体３に形成した位置決めピンからなる係合部１０の長手方向と、導光体３から一体に突き出し形成された突き当て部１１の長手方向とをほぼ直交方向に設定してなることにより、ホルダー７を基準として導光体３をその上下方向と横方向の動きを拘束することができるものであり、導光体３の振れ止めを良好に行うことができ、導光体３の取付強度を充分満足することができるという効果がある。   In the first embodiment having the above-described configuration, the locking hole provided in the holder 7 by setting and pushing the light guide 3 along the plate surface direction of the circuit board 2 with the frame-shaped holder 7 as a reference. The engaging portion 10, which is a positioning pin provided on the light guide 3, is inserted into the positioning locking portion 8, which is a portion, and positioning is regulated. At substantially the same time, the light guide 3 is prevented from coming off by being simply engaged and held by the engaging claws 9B of the engaging members 9 provided on the holders 7 that are respectively engaged with both side end portions of the light guide 3. be able to. At this time, the light guide 3 can be prevented from shaking by placing the abutting portion 11 provided on the light guide 3 against the circuit board 2. That is, the longitudinal direction of the engaging portion 10 formed of the positioning pin formed on the light guide 3 and the longitudinal direction of the abutting portion 11 that is integrally protruded from the light guide 3 are set in a substantially orthogonal direction. Thus, the light guide 3 can be restrained from moving in the vertical and horizontal directions with the holder 7 as a reference, and the light guide 3 can be satisfactorily prevented. There is an effect that the mounting strength can be sufficiently satisfied.

また、導光体３に設けた受光部４の形状を光源である発光ダイオード１位置を基準として円弧状に設定してなることにより、光源からの照射光線を円弧状に設定してなる受光部４によって放射状に導光体３の内部へと照射光線を導光案内することができ、これにより広範囲に渡って導光体３内部に平均した光線を導き入れることができ、平均した照明効果を得ることが可能となる面光源装置を提供することができる。この際、導光体３の射出部６と対向して照明表示するための表示媒体Ｈを配設してなることにより、表示媒体Ｈの表示面全体を射出部６からの照射光線によってほぼ均一的に照明表示することができるという効果がある。   In addition, the light receiving unit 4 provided on the light guide 3 is set in a circular arc shape with respect to the position of the light emitting diode 1 as a light source, so that the light beam emitted from the light source is set in a circular arc shape. 4, the irradiation light can be guided to the inside of the light guide 3 in a radial manner, whereby the average light can be introduced into the light guide 3 over a wide range, and the average lighting effect can be obtained. A surface light source device that can be obtained can be provided. At this time, the display medium H for illuminating and displaying the light guide 3 is arranged so as to face the emission part 6, so that the entire display surface of the display medium H is substantially uniform by the irradiation light from the emission part 6. There is an effect that the display can be illuminated.

また、ホルダー７を基準として導光体３を簡単に組み付けることができるため、組み付け作業効率も高めることができるとともに、面光源装置全体の小型化や実装密度を高めることのできる面光源装置を提供することが可能となる。   In addition, since the light guide 3 can be easily assembled with the holder 7 as a reference, it is possible to improve the assembly work efficiency and provide a surface light source device capable of reducing the overall surface light source device size and mounting density. It becomes possible to do.

なお、係合部材９に設けられた弾性腕片９Ａにより撓む領域の寸法を長く設定することが可能となるため弾性腕片９Ａの撓みを良好にして組み付けやすく、しかも組み付け後においては係合爪９Ｂによって導光体３と係合保持することによって抜け止め保持することができるものであり、導光体３の脱着作業を簡単に行うことができ、部品交換などにおいて操作性をも良好に行うことができるという効果がある。   Note that the elastic arm piece 9A provided on the engaging member 9 can be set to have a long dimension, so that the elastic arm piece 9A can be flexed easily and can be easily assembled. The claw 9B engages and holds the light guide 3 so that the light guide 3 can be prevented from coming off. The light guide 3 can be easily attached and detached, and the operability is excellent in parts replacement and the like. There is an effect that can be performed.

なお本発明は、前述した実施例に限定されるものではなく本発明の要旨の範囲内において種々の変形実施が可能であり、たとえば前述した各実施例では、光源として発光ダイオードを用いていたが、ランプなどによる光源であってもよいし、光源の数や設置位置などは導光体３の厚みや形状などに合わせて設定すればよい。また実施例では導光体３を無色透明に形成していたが、場合によっては、たとえば青色などに着色形成してもよいし、他の色合いに着色形成してもよいものであり、またホルダー７に設けられた係合部材９の弾性腕片９Ａの長さや幅寸法や取り付け位置などは適宜設定すればよいものであり、またホルダー７に設けた係止用孔部からなる位置決め用係止部８の形状・数などに合わせて導光体３に設けた位置決めピンからなる係合部１０を設定すればよい。   The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in each of the above-described embodiments, a light emitting diode is used as a light source. A light source such as a lamp may be used, and the number of light sources and installation positions may be set in accordance with the thickness and shape of the light guide 3. Further, in the embodiment, the light guide 3 is formed to be colorless and transparent. However, depending on the case, the light guide 3 may be formed to be colored in blue or the like, or may be formed in other shades. The length, width dimension, attachment position, etc. of the elastic arm piece 9A of the engaging member 9 provided on the engagement member 9 may be set as appropriate, and the positioning engagement comprising the engagement hole provided in the holder 7 What is necessary is just to set the engaging part 10 which consists of the positioning pin provided in the light guide 3 according to the shape, the number, etc. of the part 8.

また、前述した実施例などにおいて詳述したように、車両用の指示計器の表示装置（表示板）や透過表示基板など照明表示したり透過照明したりする面光源装置として説明したが、表示板などの照明に限らず液晶表示装置のバックライト照明として利用される導光体を用いた面光源装置においても適用することもできるものであり、また民生機器用として用いられる表示パネルやスイッチパネルなどの面光源装置として適用することも可能である。   Further, as described in detail in the above-described embodiments, the display device has been described as a surface light source device that performs illumination display or transmission illumination such as a display device (display plate) of a vehicle indicator or a transmission display substrate. It can also be applied to a surface light source device using a light guide used as a backlight illumination of a liquid crystal display device as well as lighting such as a display panel or a switch panel used for consumer equipment. It is also possible to apply as a surface light source device.

図１は、本発明の第１実施例における面光源装置を車両用指示計器の表示装置に適用した例を示す一部を拡大して表した断面図である。FIG. 1 is a partially enlarged cross-sectional view showing an example in which the surface light source device according to the first embodiment of the present invention is applied to a display device of a vehicle indicating instrument. 図２は、図１の面光源装置の要部を示した分解斜視図である。FIG. 2 is an exploded perspective view showing a main part of the surface light source device of FIG. 図３は、図１の面光源装置の導光体を主体に示した分解斜視図である。FIG. 3 is an exploded perspective view mainly showing a light guide of the surface light source device of FIG. 図４は、従来の面光源装置を示す概要断面図である。FIG. 4 is a schematic cross-sectional view showing a conventional surface light source device.

符号の説明Explanation of symbols

Ｈ 表示媒体
１ 発光ダイオード（光源）
２ 回路基板
３ 導光体
４ 受光部
５ 反射部
６ 射出部
７ ホルダー
８ 位置決め用係止部（係止用孔部）
９ 係合部材
９Ａ 弾性腕片
９Ｂ 係合爪
１０ 係合部（位置決めピン）
１１ 突き当て部 H Display medium 1 Light emitting diode (light source)
2 circuit board 3 light guide 4 light receiving part 5 reflecting part 6 emitting part 7 holder 8 positioning locking part (locking hole part)
DESCRIPTION OF SYMBOLS 9 Engagement member 9A Elastic arm piece 9B Engagement claw 10 Engagement part (positioning pin)
11 Butting part

Claims (4)

硬質材料からなる回路基板と、この回路基板に取り付けられる光源と、この光源からの照射光線を受け入れる受光部と、この受光部によって導光案内された入射光線を前記回路基板と平行方向に反射導光する反射部と、この反射部を介して導光案内された光線を外部への導き出す射出部とを備えた透光性材料からなる合成樹脂製の導光体と、この導光体を前記回路基板の所定位置に配置し支承保持する合成樹脂製のホルダーと、からなる面光源装置において、前記ホルダーには前記導光体を位置決め保持するための位置決め用係止部を形成するとともに、前記導光体を抜け止め固定するための係合爪を設けた係合部材を形成し、前記導光体には前記位置決め用係止部に位置決め規制される係合部を形成するとともに、前記導光体の振れ止めのための突き当て部を前記回路基板と対峙して設けてなることを特徴とする面光源装置。   A circuit board made of a hard material, a light source attached to the circuit board, a light receiving unit that receives the light emitted from the light source, and incident light guided by the light receiving unit in a direction parallel to the circuit board. A synthetic resin light guide made of a translucent material, comprising a light reflecting portion, and an emission portion for guiding the light guided through the reflection portion to the outside, and the light guide In a surface light source device comprising a synthetic resin holder placed and supported at a predetermined position on a circuit board, the holder has a positioning locking portion for positioning and holding the light guide, and the holder An engaging member provided with an engaging claw for securing and fixing the light guide is formed. The light guide is provided with an engaging portion that is positioned and regulated by the positioning locking portion. Light stabilizer The surface light source device characterized by comprising providing the abutting portion of the eye so as to face to the circuit board. 前記導光体に形成した前記係合部の長手方向と前記突き当て部の長手方向とをほぼ直交方向に設定してなることを特徴とする請求項１に記載の面光源装置。   2. The surface light source device according to claim 1, wherein a longitudinal direction of the engaging portion formed in the light guide and a longitudinal direction of the abutting portion are set in a substantially orthogonal direction. 前記導光体に設けた前記受光部の形状を前記光源位置を基準として円弧状に設定してなることを特徴とする請求項１または請求項２に記載の面光源装置。   3. The surface light source device according to claim 1, wherein a shape of the light receiving portion provided in the light guide is set to be an arc shape with respect to the light source position. 4. 前記導光体の射出部と対向して照明表示するための表示媒体を配設してなることを特徴とする請求項１から請求項３のいずれか１項に記載の面光源装置。   The surface light source device according to any one of claims 1 to 3, wherein a display medium for illuminating and displaying is disposed opposite to an emission part of the light guide.
JP2005371177A 2005-12-23 2005-12-23 Surface light source device Expired - Fee Related JP4821018B2 (en)

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JP2009236972A (en) * 2008-03-25 2009-10-15 Yamaha Corp Display device and manipulation device with light display
US8562162B2 (en) 2008-03-25 2013-10-22 Yamaha Corporation Display device and manipulation device with light display
JP2009272096A (en) * 2008-05-02 2009-11-19 Citizen Electronics Co Ltd Plane light source, and liquid crystal display
JP2010217418A (en) * 2009-03-16 2010-09-30 Ricoh Co Ltd Light irradiation device, image reading apparatus and image forming apparatus
KR101453051B1 (en) * 2013-02-27 2014-10-23 희성전자 주식회사 Backlight Unit
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