JPH0521849A - Led array - Google Patents

Led array

Info

Publication number
JPH0521849A
JPH0521849A JP3171430A JP17143091A JPH0521849A JP H0521849 A JPH0521849 A JP H0521849A JP 3171430 A JP3171430 A JP 3171430A JP 17143091 A JP17143091 A JP 17143091A JP H0521849 A JPH0521849 A JP H0521849A
Authority
JP
Japan
Prior art keywords
led
light
irradiation direction
main irradiation
led array
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3171430A
Other languages
Japanese (ja)
Inventor
Toshiaki Tanaka
中 敏 明 田
Tetsuo Sakaki
哲 雄 榊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP3171430A priority Critical patent/JPH0521849A/en
Publication of JPH0521849A publication Critical patent/JPH0521849A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/42Wire connectors; Manufacturing methods related thereto
    • H01L24/44Structure, shape, material or disposition of the wire connectors prior to the connecting process
    • H01L24/45Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/00014Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details

Abstract

PURPOSE:To reduce a sectional area of a device in a surface perpendicular to a main irradiation direction and to efficiently use the light by emitting light from a plurality of LED chips of one row on a printed circuit board externally along the main irradiation direction substantially parallel to the board by using a reflector. CONSTITUTION:A reflecting plate 32 is formed in a continuous length shape, and its sectional shape is formed substantially in an L shape. Lights from a plurality of LED chips 2 arranged in one row on a printed circuit board 1 are reflected on an inner surface of the plate 32 to an optical beam 34 along a main irradiation direction 35 substantially parallel to the board 1. That is, the beam 34 is emitted along the surface including the board 1. Thus, a sectional area of this device 30 in a surface perpendicular to the direction 35 can be reduced. Since the plate 32 can be mounted directly behind the chips 2, the beam can be effectively emitted from the chips 2 in the direction 35 while reducing the opening, thereby effectively applying the beam to an effective irradiation region.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ファクシミリやイメー
ジスキャナ等のLED光源として使用して好適なLED
アレイに関する。
The present invention relates to an LED suitable for use as an LED light source for facsimiles, image scanners and the like.
For arrays.

【0002】[0002]

【従来の技術】図7(a)、(b)は従来のLEDアレ
イ10を示す。このLEDアレイにおいては、ガラスエ
ポキシ系樹脂製のプリント配線基板1上に、プリント配
線(図示せず)が形成され、且つ図7(a)からわかる
ように、その長手方向に一列に複数のLEDチップ2,
2,…が配設されている。LEDチップ2の基板1への
固着は、銀エポキシ等の導電性接着剤で行われる。即
ち、LEDチップ2は、その上下両面に電極板を有する
構造となっており、その下面の電極板を導電性接着剤で
基板1に固着している。LEDチップ2(の上面の電極
板)とプリント配線との結線は金細線2Aによっても行
われる。この金細線2Aは、例えば、ワイヤーボンディ
ングなどで接続される。これらのLEDチップ2,2,
…の列を挾む両側には、白色プラスチックで成型された
長尺状の反射板3,3が対向状態に設けられている。こ
れらの反射板3,3によって、LEDチップ2,2,…
からの発光ビーム4が、基板1に垂直な主照射方向5に
向けられる。上記LEDチップ2,2,…及び反射板
3,3,…は、透明プラスチックで成型されたレンズ部
6aを有するカバー6で被われている。さらに、基板1
には、そのカバー6の外側に、そのカバーに沿って、電
流制限用チップ抵抗7が半田によって固定されている。
この抵抗7は、LEDチップ2に流れる電流を制限する
ためのものである。LEDチップ2と抵抗7は、基板1
上に形成された前述のプリント配線によって結線されて
いる。上記反射板3,3及びカバー6の上記基板1への
固定は、例えば、同図(b)からわかるように、脚部3
a,3a;6bを基板1の孔1aに挿通し、熱かしめに
よりかしめ部3b,6cを形成することにより行われ
る。
2. Description of the Related Art FIGS. 7A and 7B show a conventional LED array 10. In this LED array, a printed wiring (not shown) is formed on a printed wiring board 1 made of a glass epoxy resin, and as shown in FIG. 7A, a plurality of LEDs are arranged in a line in the longitudinal direction. Chip 2,
2, ... Are arranged. The LED chip 2 is fixed to the substrate 1 with a conductive adhesive such as silver epoxy. That is, the LED chip 2 has a structure having electrode plates on both upper and lower surfaces thereof, and the electrode plates on the lower surface thereof are fixed to the substrate 1 with a conductive adhesive. The gold wire 2A is also used to connect the LED chip 2 (the electrode plate on the upper surface thereof) and the printed wiring. The thin gold wire 2A is connected by, for example, wire bonding. These LED chips 2, 2,
Elongated reflectors 3 and 3 formed of white plastic are provided on opposite sides of the row of ... With these reflectors 3 and 3, the LED chips 2, 2, ...
The emitted light beam 4 from is directed in a main irradiation direction 5 perpendicular to the substrate 1. The LED chips 2, 2, ... And the reflection plates 3, 3, ... Are covered with a cover 6 having a lens portion 6a molded of transparent plastic. Furthermore, the substrate 1
A current limiting chip resistor 7 is fixed to the outside of the cover 6 along the cover by soldering.
The resistor 7 is for limiting the current flowing through the LED chip 2. LED chip 2 and resistor 7 are on substrate 1
It is connected by the above-mentioned printed wiring formed above. The fixing of the reflection plates 3 and 3 and the cover 6 to the substrate 1 is performed by, for example, as shown in FIG.
It is performed by inserting a, 3a; 6b into the hole 1a of the substrate 1 and forming caulked portions 3b, 6c by heat caulking.

【0003】図中、1Bは取付用孔であり、このアレイ
10をバーコードリーダー等のケース内に取り付けるの
に使用される。
In the figure, 1B is a mounting hole, which is used to mount the array 10 in a case such as a bar code reader.

【0004】上記LEDアレイにおいては、基板1と垂
直な方向(主照射方向)5に発光ビーム4を射出するよ
うにしている。つまり、従来のLEDアレイにおいて
は、光の経路と垂直な面内に基板1が位置している。而
して、基板1は、その上に各種の部材が配設されるもの
である。そのため、基板1はある程度大きくなるのが避
けられない。このため、このようなLEDアレイを組み
込んだ装置自体の大形化も避けられない。さらに、上記
LEDアレイを各装置内に組み込む際に、基板1が光路
の一部を遮らないように留意しなければならない。この
ようにしようとすると、光学系が大形化し、これによっ
ても装置全体の大形化が避けられない。
In the above LED array, the emission beam 4 is emitted in the direction 5 (main irradiation direction) perpendicular to the substrate 1. That is, in the conventional LED array, the substrate 1 is located in the plane perpendicular to the light path. Thus, the substrate 1 has various members arranged thereon. Therefore, it is inevitable that the substrate 1 becomes large to some extent. Therefore, it is inevitable that the device itself incorporating such an LED array becomes large-sized. Furthermore, when incorporating the above LED array into each device, care must be taken so that the substrate 1 does not block part of the optical path. If this is attempted, the size of the optical system becomes large, which also inevitably causes the size of the entire apparatus to become large.

【0005】図8及び図9は大形化した装置の例を示
す。即ち、図8は、いわゆる密着型センサの一部を示
す。この図8では、LEDアレイ10,10からの発光
ビーム4で原稿面13を照射する。このときの反射光4
Aをロッドレンズアレイ(セルフォックレンズ:商品
名)11を介してCCD12で受光する。このロッドア
レイ11は、入力光像をそのままの大きさで出力光像と
して出力するものである。この図8の密着型センサは、
基板1の大きさに起因して、特にLEDアレイ10を原
稿面13にある程度以上近づけることができず、装置が
大形となるのが避けられない。
8 and 9 show an example of a large-sized device. That is, FIG. 8 shows a part of a so-called contact sensor. In FIG. 8, the document surface 13 is illuminated with the light emission beam 4 from the LED arrays 10, 10. Reflected light 4 at this time
A is received by the CCD 12 through the rod lens array (SELFOC lens: trade name) 11. The rod array 11 outputs an input light image as it is as an output light image. The contact sensor of FIG. 8 is
Due to the size of the substrate 1, it is inevitable that the LED array 10 cannot be brought close to the document surface 13 to a certain extent or more, and the device becomes large.

【0006】図9は、いわゆるレンズ縮小型センサの一
部を示す。この図9では、LEDアレイ10からの発光
ビーム4で原稿面13を照射する。このときの反射光4
Aをミラー15で反射させ、レンズ16を介してCCD
12で検出する。この図9のレンズ縮小型センサは、基
板1の大きさに起因して、特にLEDアレイ10を設け
る位置を光路が遮られない位置となるように設計しなけ
ればならず、装置の大形化が避けられない。
FIG. 9 shows a part of a so-called lens reduction type sensor. In FIG. 9, the document surface 13 is illuminated with the emission beam 4 from the LED array 10. Reflected light 4 at this time
A is reflected by the mirror 15 and the CCD is passed through the lens 16.
Detect at 12. Due to the size of the substrate 1, the lens reduction type sensor of FIG. 9 must be designed especially so that the position where the LED array 10 is provided is a position where the optical path is not blocked, and the size of the device is increased. Is inevitable.

【0007】さらに、上記従来のLEDアレイ10にお
いては、アッセンブリ精度についての余裕をとっておい
て、品質を確保するための寸法の制約によって、反射板
3,3の開口面積は、LEDチップ2の寸法に対してか
なり大きく設定されている。このため、LEDチップ2
からの発光ビーム4のうちの反射板3,3で反射された
光のなかには、無効なものもあった。即ち、図9からわ
かるように、チップ2から出て反射板3で反射し、カバ
ー6のレンズ部分6Aで屈折して出ていく発光ビーム4
Aは、有効照射領域18には達しない、無効光となって
いた。つまり、LEDチップ2からの光を有効に利用す
ることができなかった。
Further, in the conventional LED array 10 described above, the opening areas of the reflectors 3 and 3 are smaller than those of the LED chip 2 due to the dimension restriction for ensuring quality with a margin for assembly accuracy. It is set quite large relative to the dimensions. Therefore, the LED chip 2
Some of the light reflected from the reflection plates 3 and 3 of the emitted light beam 4 from the laser was ineffective. That is, as can be seen from FIG. 9, the emission beam 4 is emitted from the chip 2, reflected by the reflection plate 3, refracted by the lens portion 6A of the cover 6, and emitted.
A is ineffective light that does not reach the effective irradiation area 18. That is, the light from the LED chip 2 could not be effectively used.

【0008】さらに、基板1と垂直な方向を主照射方向
とする場合には、LEDチップ2の真うしろには反射面
を形成することができない。このため、有効な反射が期
待できなかった。
Further, when the main irradiation direction is the direction perpendicular to the substrate 1, it is not possible to form a reflecting surface behind the LED chip 2. Therefore, effective reflection could not be expected.

【0009】図11(a),(b)は従来例の異なる例
を示し、(a)は斜視図、(b)はそのA−A断面図を
示す。この例が図7と異なる点は、円柱状のレンズ6A
にある。即ち、この例では、一対の反射板3,3間に円
柱状のレンズ6Aを支持させている。他の構成は図7の
ものと同一であり、同一の部材に同一の符号を付してい
る。
11 (a) and 11 (b) show different examples from the conventional example, FIG. 11 (a) is a perspective view, and FIG. 11 (b) is a sectional view taken along line AA. This example differs from FIG. 7 in that a cylindrical lens 6A is used.
It is in. That is, in this example, the cylindrical lens 6A is supported between the pair of reflection plates 3 and 3. Other configurations are the same as those in FIG. 7, and the same members are designated by the same reference numerals.

【0010】図12(a),(b)は従来例のさらに異
なる例を示す。この例では、基板1の幅方向両側を一対
の反射板3,3で挾み、基板1及び反射板3,3の長手
方向両端を一対の支持片1A,1Aで挾んでいる。そし
て、上記一対の支持板3,3間でレンズ6Aを挾んでい
る。他の構成は、図7等のものと同一であり、同一の部
材に同一の符号を付している。
12 (a) and 12 (b) show a further different example from the conventional example. In this example, both sides of the substrate 1 in the width direction are sandwiched by the pair of reflection plates 3 and 3, and both ends of the substrate 1 and the reflection plates 3 and 3 in the longitudinal direction are sandwiched by the pair of support pieces 1A and 1A. The lens 6A is sandwiched between the pair of support plates 3 and 3. Other configurations are the same as those of FIG. 7 and the like, and the same members are denoted by the same reference numerals.

【0011】上記の図11,図12の装置も、図7の装
置と同様に、基板1に垂直な方向に光4を射出する。こ
のため、これらの装置にも、図7の装置におけると同様
の、上述の問題がある。
Similarly to the device shown in FIG. 7, the device shown in FIGS. 11 and 12 emits the light 4 in the direction perpendicular to the substrate 1. Therefore, these devices also have the same problems as described above in the device of FIG.

【0012】即ち、LEDチップの集積度が上がると電
流制御用抵抗の数は必然的に増大する。このため、抵抗
の配設面積も増大する。
That is, as the integration of the LED chips increases, the number of current control resistors inevitably increases. Therefore, the area where the resistors are provided is increased.

【0013】従来、LEDアレイは、複数のLEDチッ
プに対して1個の電流制御用抵抗を付けている。しか
し、照度規格が非常に厳しくなった場合、LEDチップ
の1個に対し電流制御用抵抗1個を必要とする。これに
より、電流制御用抵抗配設面積は増大する。又、主照射
方向に対し、プリント配線基板は垂直に配置している。
この為上記の様にプリント基板面積が増大すれば、バー
コードリーダ等の薄型製品の実装は困難である。
Conventionally, in the LED array, one current controlling resistor is attached to a plurality of LED chips. However, when the illuminance standard becomes very strict, one current control resistor is required for each LED chip. As a result, the current control resistor disposition area increases. Further, the printed wiring board is arranged perpendicular to the main irradiation direction.
Therefore, if the printed circuit board area increases as described above, it is difficult to mount a thin product such as a bar code reader.

【0014】[0014]

【発明が解決しようとする課題】上述のように、従来の
LEDアレイにおいては、LEDチップからの発光ビー
ムの主照射方向は基板とほぼ垂直であり、このため、基
板面内におけるLEDアレイの小型化が困難で、且つL
EDチップからの発光ビームを有効に利用できなかっ
た。
As described above, in the conventional LED array, the main irradiation direction of the light emission beam from the LED chip is substantially perpendicular to the substrate, and therefore, the LED array is small in size in the plane of the substrate. Difficult to convert and L
The emission beam from the ED chip could not be used effectively.

【0015】本発明は、上記に鑑みてなされたもので、
その目的は、LEDチップからの発光ビームの主照射方
向に垂直な面内における装置の断面積を小さくできると
共にLEDチップからの光を効率良く利用できるLED
アレイを提供することにある。
The present invention has been made in view of the above,
The purpose is to reduce the cross-sectional area of the device in the plane perpendicular to the main irradiation direction of the emission beam from the LED chip and to efficiently use the light from the LED chip.
To provide an array.

【0016】[0016]

【課題を解決するための手段】本発明の第1のLEDア
レイは、プリント配線基板と、このプリント配線基板上
にほぼ一列に配設され、光を射出可能な複数個のLED
チップと、これらのLEDチップからの前記光を反射し
て前記基板とほぼ平行な主照射方向に沿って外部に射出
させる反射体と、を備えたものとして構成される。
A first LED array of the present invention includes a printed wiring board and a plurality of LEDs arranged on the printed wiring board in a line and capable of emitting light.
It is configured to include a chip and a reflector that reflects the light from these LED chips and emits the light to the outside along a main irradiation direction substantially parallel to the substrate.

【0017】本発明の第2のLEDアレイは、前記第1
のLEDアレイにおいて、前記反射体は、前記LEDチ
ップを挾んで前記主照射方向と反射側にも反射面を有す
るものとして構成される。
The second LED array of the present invention is the first LED array.
In the above LED array, the reflector is configured so as to have a reflecting surface on both sides of the LED chip and the main irradiation direction and the reflecting side.

【0018】本発明の第3のLEDアレイは、前記第1
又は第2のLEDアレイにおいて、前記反射体は横断面
がほぼL形の長尺状のものとして構成されている。
A third LED array of the present invention is the first LED array described above.
Alternatively, in the second LED array, the reflector is configured as an elongated shape having a substantially L-shaped cross section.

【0019】本発明の第4のLEDアレイは、プリント
配線基板と、このプリント配線基板上にほぼ一列に配設
され、光を射出可能な複数個のLEDチップと、これら
のLEDチップからの前記光を前記基板とほぼ平行な主
照射方向に沿って外部に射出させるレンズ手段と、を備
えたものとして構成される。
A fourth LED array of the present invention is a printed wiring board, a plurality of LED chips arranged on the printed wiring board substantially in a line and capable of emitting light, and the above-mentioned LED chips. Lens means for emitting light to the outside along a main irradiation direction substantially parallel to the substrate.

【0020】本発明の第5のLEDアレイは、前記第4
のLEDアレイにおいて、前記レンズ手段の光軸を、前
記LEDチップの中心を通る前記主照射方向に沿った軸
よりも、前記基板から離れたものとし、前記レンズ手段
として集光能力の高い大型のものを用いたものとして構
成される。
The fifth LED array of the present invention is the fourth LED array described above.
In the above LED array, the optical axis of the lens means is farther from the substrate than the axis along the main irradiation direction that passes through the center of the LED chip, and the lens means has a large condensing ability and is large. It is configured as one using things.

【0021】[0021]

【作用】LEDチップからの光は、反射板又はレンズ手
段によって、基板とほぼ平行な主照射方向に射出され
る。反射向は、LEDチップの真うしろにも反射面を有
する。このため、反射効率が高まり、高照度が得られ
る。また、レンズ手段の光軸を、LEDの軸よりも離し
て、レンズ手段として大型のものを用いることにより、
集光性が高まり、高照度が得られる。
The light from the LED chip is emitted by the reflecting plate or the lens means in the main irradiation direction substantially parallel to the substrate. The reflection direction also has a reflection surface behind the LED chip. Therefore, the reflection efficiency is increased and high illuminance can be obtained. Further, by separating the optical axis of the lens means from the axis of the LED and using a large lens means,
The light condensing property is enhanced and high illuminance can be obtained.

【0022】[0022]

【実施例】図1(a),(b)は本発明の一実施例を示
す。図1(a),(b)において、図7(a),(b)
と同等の要素には、図7(a),(b)と同一の符号を
付している。図1(a),(b)が図7(a),(b)
と異なる点は、反射板32とカバー31の構成にある。
それ以外の点においては、等しい構造を有する。
1 (a) and 1 (b) show an embodiment of the present invention. In FIGS. 1A and 1B, FIGS. 7A and 7B
The same elements as those in FIG. 7 are denoted by the same reference numerals as those in FIGS. FIGS. 1A and 1B are FIGS. 7A and 7B.
The difference from is in the configuration of the reflection plate 32 and the cover 31.
Otherwise, they have the same structure.

【0023】即ち、反射板32は1つだけ設けられてい
る。その反射板32は長尺状をなし、横断面がほぼL字
形をしている。この反射板32はLEDチップ2からの
光を主照射方向34に反射させるものである。この反射
板32の内面形状を断面が放物面に近い形とすることも
できる。この反射板32の基板1への固着は、図7の場
合と同様に、脚部32aを基板1の孔1aに挿通し、熱
かしめによってかしめ部32bを形成することによって
行われる。カバー31は、長尺状をなし、下側の開放し
たほぼチャネル状となっている。そのカバー31は、主
照射方向34側の側面にレンズ部31aを有する。レン
ズ部31aの光軸L1と、LEDチップ2を通る軸L2
とが互いにずれるようにしている。これによりレンズ部
31aとして、主軸放射方向35に十分な光量を射出可
能な大きなものを用いることができる。レンズ部31a
と対向する側面の脚部31bを基板1の孔1aに挿通
し、熱かしめによってかしめ部31cを形成している。
上記レンズ部31a側の側壁の内面には、反射板32の
先端面32c及び基板1の側端面1bが当接している。
これらの面32c,1bは必要に応じて接着剤で固定さ
れる。
That is, only one reflector 32 is provided. The reflection plate 32 has an elongated shape, and has a substantially L-shaped cross section. The reflector 32 reflects the light from the LED chip 2 in the main irradiation direction 34. The shape of the inner surface of the reflection plate 32 may be a shape whose cross section is close to a paraboloid. The fixing of the reflection plate 32 to the substrate 1 is performed by inserting the leg portion 32a into the hole 1a of the substrate 1 and forming the caulking portion 32b by heat caulking, as in the case of FIG. The cover 31 has an elongated shape, and has a substantially open channel shape on the lower side. The cover 31 has a lens portion 31a on the side surface on the main irradiation direction 34 side. The optical axis L1 of the lens portion 31a and the axis L2 passing through the LED chip 2
I am trying to shift and from each other. As a result, as the lens portion 31a, a large lens portion that can emit a sufficient amount of light in the principal axis radiation direction 35 can be used. Lens part 31a
The leg portion 31b on the side surface opposite to is inserted into the hole 1a of the substrate 1 and the caulking portion 31c is formed by heat caulking.
The tip end surface 32c of the reflection plate 32 and the side end surface 1b of the substrate 1 are in contact with the inner surface of the side wall on the lens portion 31a side.
These surfaces 32c and 1b are fixed with an adhesive as needed.

【0024】このようなLEDアレイ30において、L
EDチップ2からの発光ビーム34は、反射板32の内
面での反射により、主照射方向35に沿った光となる。
即ち、基板1を含む面に沿った光となる。このLEDア
レイ30は、特に図1(b)からわかるように、主照射
方向35に垂直な面内における横断面積の小さなものと
なる。
In such an LED array 30, L
The emission beam 34 from the ED chip 2 becomes light along the main irradiation direction 35 due to reflection on the inner surface of the reflection plate 32.
That is, the light is along the surface including the substrate 1. This LED array 30 has a small cross-sectional area in a plane perpendicular to the main irradiation direction 35, as can be seen particularly from FIG.

【0025】図1(a),(b)の実施例では、LED
チップ2からの発光ビーム34を反射板32で反射させ
るようにしているが、必要に応じてこの反射板32を省
略することもできる。この場合には、レンズ部31aの
みの働きにより、LEDチップ2からの光は主照射方向
に集光する。逆に、レンズ部31を省略して、反射板3
2のみとすることもできる。
In the embodiment shown in FIGS. 1A and 1B, the LED is
Although the emission beam 34 from the chip 2 is reflected by the reflection plate 32, the reflection plate 32 can be omitted if necessary. In this case, the light from the LED chip 2 is condensed in the main irradiation direction by the function of only the lens portion 31a. On the contrary, the lens part 31 is omitted and the reflector 3
It is also possible to set only 2.

【0026】上記実施例によれば、以下のような効果が
得られる。
According to the above embodiment, the following effects can be obtained.

【0027】従来は不可能であったが、本実施例によれ
ば、LEDチップ2の真うしろに反射板32による反射
面を設けることができる。これにより、図2からわかる
ように、開口を小さなものとしつつも、LEDチップ2
からの発光ビームを主照射方向35に確実に射出して、
有効照射領域18を適確に照射することができる。
According to the present embodiment, a reflection surface by the reflection plate 32 can be provided in the back of the LED chip 2, which was impossible in the past. As a result, as can be seen from FIG. 2, the LED chip 2 has a small opening.
The emission beam from is surely emitted in the main irradiation direction 35,
The effective irradiation area 18 can be accurately irradiated.

【0028】これにより、図3の密着センサにおいて
は、照射面(原稿面)の照度を、通常の使用条件におい
て、従来に比べて約1.3〜1.5倍とすることができ
る。逆に、照度が従来と同じでよければ、LEDチップ
の数を減らすことができる。これにより、大幅なコスト
ダウンが可能となる。
As a result, in the contact sensor of FIG. 3, the illuminance on the irradiation surface (original surface) can be increased by about 1.3 to 1.5 times as compared with the conventional one under normal use conditions. On the contrary, if the illuminance is the same as the conventional one, the number of LED chips can be reduced. This enables a significant cost reduction.

【0029】また、主照射方向に垂直な面内におけるL
EDアレイの断面積を小さなものとできたことから、図
3及び図4に示すように、密着センサ及びレンズ縮小型
センサの小形化が達成される。特に、図4のレンズ縮小
型センサにおいては、LEDアレイ30を、それが光路
を遮断しないような位置関係に設けるのが極めて容易で
ある。
L in the plane perpendicular to the main irradiation direction
Since the cross-sectional area of the ED array can be made small, miniaturization of the contact sensor and the lens reduction type sensor can be achieved as shown in FIGS. 3 and 4. Particularly, in the lens reduction type sensor of FIG. 4, it is extremely easy to provide the LED array 30 in such a positional relationship that it does not block the optical path.

【0030】図5,図6は本発明の異なる実施例の斜視
図及びA−A線断面図を示す。この例が上記の他の実施
例と異なる点は反射板3の形状にある。即ち、反射板3
を横断面がほぼL型のものとしている。この反射板3の
下片に、所定間隔で複数の脚部(ピン)3bを完成して
いる。これらの脚部3bを基板1の孔1a内に挿入して
熱かしめ手段により両者を固定している。反射板3Aの
両端には取付用ガイド3Ao ,3Ao を形成している。
これらのガイド3Ao ,3Ao により、このLEDアレ
イが、バーコードリーダーのケース内に固定される。
5 and 6 show a perspective view and a sectional view taken along the line AA of another embodiment of the present invention. This example differs from the other examples described above in the shape of the reflector 3. That is, the reflector 3
Has a substantially L-shaped cross section. A plurality of legs (pins) 3b are completed on the lower piece of the reflection plate 3 at predetermined intervals. These leg portions 3b are inserted into the holes 1a of the substrate 1 and fixed by heat staking means. Mounting guides 3A o and 3A o are formed at both ends of the reflector 3A.
By these guides 3A o and 3A o , the LED array is fixed in the case of the bar code reader.

【0031】図5,図6の実施例によれば、以下の効果
が得られる。
According to the embodiments shown in FIGS. 5 and 6, the following effects can be obtained.

【0032】(1)LEDからの主照射の方向を基板と
平行としたので、製品を薄いものとすることができる。
(1) Since the main irradiation direction from the LED is parallel to the substrate, the product can be made thin.

【0033】(2)実施例のLEDアレイを用いれば、
発光ビームの主照射方向の反対側に反射壁を配置するこ
とができる。この反射壁により反射光を有効な照射領域
に到達させることができる。
(2) If the LED array of the embodiment is used,
A reflection wall can be arranged on the side opposite to the main irradiation direction of the emission beam. This reflection wall allows reflected light to reach an effective irradiation area.

【0034】(3)反射板に取り付け用のガイド、例え
ば、プリント配線基板の面サイドよりも外側に1mmだけ
突出した肉厚1.6mmのガイドを設けたので、従来の様
なプリント配線基板の外形をガイドとする必要がなくな
り、小スペース薄形製品(バーコードリーダ等)への実
装が可能となった。
(3) Since a guide for attachment, for example, a guide having a thickness of 1.6 mm protruding by 1 mm outside the surface side of the printed wiring board is provided on the reflection plate, the conventional printed wiring board It is not necessary to use the outer shape as a guide, and it is possible to mount it on thin products with a small space (bar code reader, etc.).

【0035】[0035]

【発明の効果】本発明によれば、LEDチップからの光
をプリント配線基板が含まれる面とほぼ平行な主照射方
向に射出させることができ、これにより主照射方向と垂
直な面に含まれる断面積を小さなものとでき、ある製品
に組み込む際における設計の自由度を高くでき、且つ製
品全体としての小形化を達成でき、さらには照射面の照
度を向上させるのも容易に行える。
According to the present invention, the light from the LED chip can be emitted in the main irradiation direction substantially parallel to the surface including the printed wiring board, so that the light is included in the surface perpendicular to the main irradiation direction. The cross-sectional area can be made small, the degree of freedom in design when incorporating into a certain product can be increased, the size of the entire product can be reduced, and the illuminance on the irradiation surface can be easily improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例の部分破断斜視図及びA−A
線断面図。
FIG. 1 is a partially cutaway perspective view and AA of an embodiment of the present invention.
FIG.

【図2】本発明の一実施例の動作説明図。FIG. 2 is an operation explanatory diagram of an embodiment of the present invention.

【図3】本発明の一実施例を組み込んだ装置の一部を示
す説明図。
FIG. 3 is an explanatory view showing a part of an apparatus incorporating an embodiment of the present invention.

【図4】本発明の一実施例を組み込んだ装置の一部を示
す説明図。
FIG. 4 is an explanatory view showing a part of an apparatus incorporating an embodiment of the present invention.

【図5】本発明の他の実施例の斜視図。FIG. 5 is a perspective view of another embodiment of the present invention.

【図6】図5の断面図。6 is a sectional view of FIG.

【図7】従来例の斜視図及び断面図。FIG. 7 is a perspective view and a sectional view of a conventional example.

【図8】本発明の一実施例を組み込んだ装置の一部を示
す説明図。
FIG. 8 is an explanatory view showing a part of an apparatus incorporating an embodiment of the present invention.

【図9】本発明の一実施例を組み込んだ装置の一部を示
す説明図。
FIG. 9 is an explanatory view showing a part of an apparatus incorporating an embodiment of the present invention.

【図10】図7の動作説明図。10 is an explanatory diagram of the operation of FIG. 7.

【図11】異なる従来例の斜視図及び断面図。FIG. 11 is a perspective view and a sectional view of a different conventional example.

【図12】さらに異なる従来例の斜視図及び断面図。FIG. 12 is a perspective view and a sectional view of still another conventional example.

【符号の説明】[Explanation of symbols]

1 プリント配線基板 2 LEDチップ 31a レンズ部分 35 主照射方向 1 printed wiring board 2 LED chips 31a lens part 35 Main irradiation direction

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】プリント配線基板と、 このプリント配線基板上にほぼ一列に配設され、光を射
出可能な複数個のLEDチップと、 これらのLEDチップからの前記光を反射して前記基板
とほぼ平行な主照射方向に沿って外部に射出させる反射
体と、 を備えたことを特徴とする、LEDアレイ。
1. A printed wiring board, a plurality of LED chips arranged in a line on the printed wiring board and capable of emitting light, and the substrate reflecting the light from the LED chips. An LED array comprising: a reflector that is emitted to the outside along a substantially parallel main irradiation direction.
【請求項2】前記反射体は、前記LEDチップを挾んで
前記主照射方向と反射側にも反射面を有する、請求項1
記載のLEDアレイ。
2. The reflector has a reflecting surface on both the main irradiation direction and the reflecting side across the LED chip.
The LED array described.
【請求項3】前記反射体は横断面がほぼL形の長尺状の
ものとして形成されている、請求項1又は2に記載のL
EDアレイ。
3. The L according to claim 1, wherein the reflector is formed as a long one having a substantially L-shaped cross section.
ED array.
【請求項4】プリント配線基板と、 このプリント配線基板上にほぼ一列に配設され、光を射
出可能な複数個のLEDチップと、 これらのLEDチップからの前記光を前記基板とほぼ平
行な主照射方向に沿って外部に射出させるレンズ手段
と、 を備えたことを特徴とする、LEDアレイ。
4. A printed wiring board, a plurality of LED chips arranged on the printed wiring board in a line and capable of emitting light, and the light from these LED chips being substantially parallel to the board. An LED array comprising: a lens unit that emits light to the outside along the main irradiation direction.
【請求項5】前記レンズ手段の光軸を、前記LEDチッ
プの中心を通る前記主照射方向に沿った軸よりも、前記
基板から離れたものとし、前記レンズ手段として集光能
力の高い大型のものを用いた、請求項4記載のLEDア
レイ。
5. An optical axis of the lens means is located farther from the substrate than an axis along the main irradiation direction passing through the center of the LED chip, and the lens means has a large light-collecting ability and a large size. The LED array according to claim 4, wherein the LED array is used.
JP3171430A 1990-07-17 1991-07-11 Led array Pending JPH0521849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3171430A JPH0521849A (en) 1990-07-17 1991-07-11 Led array

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP18844190 1990-07-17
JP2-188441 1990-07-17
JP3171430A JPH0521849A (en) 1990-07-17 1991-07-11 Led array

Publications (1)

Publication Number Publication Date
JPH0521849A true JPH0521849A (en) 1993-01-29

Family

ID=26494162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3171430A Pending JPH0521849A (en) 1990-07-17 1991-07-11 Led array

Country Status (1)

Country Link
JP (1) JPH0521849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467417A2 (en) * 2003-04-09 2004-10-13 Citizen Electronics Co., Ltd. Light emitting diode lamp
EP1049179A3 (en) * 1999-04-30 2006-07-26 Rohm Co., Ltd. Chip-type semiconductor light emitting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61148884A (en) * 1984-12-22 1986-07-07 Toshiba Corp Optical semiconductor device
JPS648759B2 (en) * 1982-02-09 1989-02-15 Yuri Roll Kikai Kk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS648759B2 (en) * 1982-02-09 1989-02-15 Yuri Roll Kikai Kk
JPS61148884A (en) * 1984-12-22 1986-07-07 Toshiba Corp Optical semiconductor device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1049179A3 (en) * 1999-04-30 2006-07-26 Rohm Co., Ltd. Chip-type semiconductor light emitting device
EP1467417A2 (en) * 2003-04-09 2004-10-13 Citizen Electronics Co., Ltd. Light emitting diode lamp
EP1467417A3 (en) * 2003-04-09 2009-07-22 Citizen Electronics Co., Ltd. Light emitting diode lamp

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