JPS63138788A - Led array - Google Patents
Led arrayInfo
- Publication number
- JPS63138788A JPS63138788A JP61286447A JP28644786A JPS63138788A JP S63138788 A JPS63138788 A JP S63138788A JP 61286447 A JP61286447 A JP 61286447A JP 28644786 A JP28644786 A JP 28644786A JP S63138788 A JPS63138788 A JP S63138788A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- led
- luminous
- light emission
- printed
- 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
Links
- 230000003247 decreasing effect Effects 0.000 claims abstract 2
- 239000004020 conductor Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 239000006185 dispersion Substances 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Led Device Packages (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、画像読取装置の光源、電子写真装置の感光体
除電用光源、光プリンタの出力光源及び面光源として使
用する装置、および、各ｌ！Ｉｔｉ器の操作表示装置に
おける複数ＬＥＤからなるレベルメータ等の状態表示を
行うＬＥＤアレイに関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a light source for an image reading device, a light source for removing static electricity from a photoreceptor in an electrophotographic device, a device used as an output light source and a surface light source for an optical printer, and a light source for each l! The present invention relates to an LED array that displays the status of a level meter or the like made up of a plurality of LEDs in an operation display device of an ITI device.
（従来技術）
ＬＥＤは近年多種多様な使途が開発され、光源あるいは
状態表示等に用いられる事が多くなった。(Prior Art) In recent years, LEDs have been developed for a wide variety of uses, and are increasingly used as light sources or status indicators.
しかしＬＥＤは点発光が基本であり、これを線発光ある
いは面発光とする時はこれら点発光の集合体である。こ
の時、各々のＬＥＤの発光レベルにはばらつきがあり、
これを防ぐには下記の方法などが用いられていたが欠点
も多い。However, LEDs are basically point-emitting lights, and when they are used as line-emitting or surface-emitting lights, they are a collection of these point-emitting lights. At this time, there are variations in the light emission level of each LED,
The following methods have been used to prevent this, but they have many drawbacks.
■ＬＥＤを選別してばらつき少なくしようとするとＬＥ
Ｄの選別ランクが多くなり管理が複雑となる。■If you try to sort out LEDs to reduce variations, LE
The number of sorting ranks of D increases and management becomes complicated.
■抵抗器をＬＥＤのばらつきに対応したものを使用する
場合は抵抗器の管理種類が多くなり製造管理が複雑とな
る。■When using resistors that can accommodate variations in LEDs, there are many types of resistors to manage, which complicates manufacturing management.
■可変抵抗器をＬＥＤのばらつきに対応したものを使用
する場合は、可変抵抗器の調整が各ＬＥＤに対して行わ
なければならない為、製造工程が増える。- When using a variable resistor that can accommodate variations in LEDs, the manufacturing process increases because the variable resistor must be adjusted for each LED.
０発光レベルをフィードバックして通電電流を可変とす
る場合は、フィードバックの制御回路を各ＬＥＤに対応
させなければならない為、複雑で高価、大型となる。In the case where the energizing current is made variable by feeding back the 0 light emission level, a feedback control circuit must be provided for each LED, which results in a complicated, expensive, and large-sized device.
上記の方法を用いるとそれぞれ欠点を有し、現在多用さ
れている■、■の両方の方法により精度を上げるのが安
価で、しかも装置も小形であるとされているが、大きな
ばらつきはとれても、小さなばらつきは残る。Each of the above methods has its drawbacks, and it is said that it is cheaper to increase accuracy by using methods ① and ③, which are currently widely used, and the equipment is also small, but large variations cannot be eliminated. However, small variations remain.
（目的）
ＬＥＤアレイにおいて部品種類を増やさず、大型化せず
に均一な線発光または面発光を１得ることを目的とする
。(Purpose) The purpose is to obtain uniform line or surface light emission in an LED array without increasing the number of parts or increasing the size.
（構成）
本発明の構成について、以下、一実施例に基づいて説明
する。(Structure) The structure of the present invention will be described below based on one embodiment.
第１図は配線基盤上に設けられた電極２．３上に印刷さ
れた抵抗体１を示しくｂ）は印刷抵抗体を印刷後削った
図である。（ａ）の抵抗体１の値は発光させるＬＥＤの
必要発光光度に対応した電流とする抵抗値であって、ば
らつきで発光効率の高いＬＥＤの発光レベルを適正にで
きる程度とする。FIG. 1 shows a resistor 1 printed on an electrode 2.3 provided on a wiring board, and b) is a diagram of the printed resistor 1 after printing and cutting. The value of the resistor 1 in (a) is a resistance value that provides a current corresponding to the required luminous intensity of the LED to emit light, and is set to such a value that the light emission level of the LED with high luminous efficiency can be adjusted appropriately with variations.
（ｂ）の抵抗体１′は（ａ）の抵抗体重を、例えばレー
ザで削って作るが、ばらつきにより発光効率の低いＬＥ
Ｄに対して削り量を変えて発光レベルを適正とする。The resistor 1' in (b) is made by cutting the resistor weight in (a) using a laser, for example, but due to variations, the LE has low luminous efficiency.
Change the amount of scraping for D to make the light emission level appropriate.
第２図は第１図の例が広さを変えるのに対し、厚みを変
えてＬＥＤの発光レベルを適正化する例を示す。第１図
の例における抵抗体は薄膜型抵抗体あるいは厚膜型抵抗
体でも良いし、第２図の例では厚膜型抵抗体が良い。抵
抗値の範囲＝１！１整、生産性等では厚膜の方が有利で
あるが、設定ばらつきが多い。このばらつきは第１図及
び第２図に示すような調整方法によって吸収できる。FIG. 2 shows an example in which the width is changed in the example of FIG. 1, but the thickness is changed to optimize the light emission level of the LED. The resistor in the example of FIG. 1 may be a thin film resistor or a thick film resistor, and the resistor in the example of FIG. 2 may be a thick film resistor. The range of resistance values is 1:1, and thick films are more advantageous in terms of productivity, etc., but there are many variations in settings. This variation can be absorbed by the adjustment method shown in FIGS. 1 and 2.
第３図は第１図の（ａ）又は第２図の（ａ）に示された
状態から抵抗調整をする別の方法である。FIG. 3 shows another method for adjusting the resistance from the state shown in FIG. 1(a) or FIG. 2(a).
６．７．８はペースト状の導体で、例えば銀ペーストで
ある。第３図の（ａ）はペースト６によってショート区
間を設けて抵抗値を下げ、第３図の（ｂ）はペースト７
．８によって電極間を短くして抵抗値を下げる例を示す
。この調整はペーストの塗布範囲を調整することによっ
て抵抗値調整を行う。6.7.8 is a paste-like conductor, for example, silver paste. Figure 3(a) shows a short section with paste 6 to lower the resistance value, and Figure 3(b) shows paste 7.
．． 8 shows an example in which the distance between electrodes is shortened to lower the resistance value. In this adjustment, the resistance value is adjusted by adjusting the paste application range.
第４図は発光光度に対する必要抵抗値を求める装置のブ
ロック図である。ＬＥＤの発光光度に応じて電気信号を
出力する更正された光センサーを用い、必要発光光度の
出力電気１８号を基準値とする。この時ＬＥＤと光セン
サーの距離は使用条件にて設定される。また、他の条件
も使用条件にて設定される。実際、ＬＥＤによる光出力
電流を電気ｆｆｉ号に変換し、この出力と先程の基準値
とを比較し、可変抵抗器の抵抗値を変更する。FIG. 4 is a block diagram of a device for determining the required resistance value for the luminous intensity. A calibrated optical sensor that outputs an electrical signal according to the luminous intensity of the LED is used, and the output electricity No. 18 of the required luminous luminous intensity is used as a reference value. At this time, the distance between the LED and the optical sensor is set according to the usage conditions. Other conditions are also set in the usage conditions. In fact, the optical output current from the LED is converted into an electrical ffi number, this output is compared with the reference value mentioned earlier, and the resistance value of the variable resistor is changed.
この変更手段は、例えば出力をパルス変調し、パルスモ
ータにてそのパルス分回転させ、この回転運動により回
転形可変抵抗器の抵抗値を変えるか、あるいは回転運動
を直進運動に変えて直線スライド可変抵抗器の抵抗値を
変更する等がある。This changing means, for example, pulse-modulates the output, rotates it by the pulse amount with a pulse motor, and changes the resistance value of the rotary variable resistor by this rotational movement, or changes the rotational movement to linear movement to make a linear slide variable. This includes changing the resistance value of a resistor.
この様な手段によって変更された抵抗値によりＬＥＤは
電流制限され、発光光度が変化する。この可変抵抗値は
出力装置により表示するか、あるいは、次の装置へ情報
として出力される。第４図は一種の自動調光装置であり
、その調光した抵抗値の出力装置が付加された内容を示
す。The resistance value changed by such means limits the current of the LED and changes the luminous intensity. This variable resistance value is displayed by an output device or output as information to the next device. FIG. 4 is a kind of automatic light control device, and shows the added contents of the light control device including a resistance value output device.
第５図は第４図の出力を受け、抵抗体の抵抗値を調整す
る装置のブロック図である。先程の出力情報を入力装置
で受け、これをメモリにて基準情報として蓄える。そし
てこの情報とセットとなる印刷抵抗体の抵抗値出力と比
較し、その結果、抵抗調整装置にて抵抗体を削るか、あ
るいは導電ペーストの塗布、調整をおこなう。FIG. 5 is a block diagram of a device that receives the output of FIG. 4 and adjusts the resistance value of a resistor. The input device receives the output information from earlier, and stores it in the memory as reference information. Then, this information is compared with the resistance value output of the printed resistor to be used as a set, and as a result, the resistor is shaved off using a resistance adjustment device, or a conductive paste is applied and adjusted.
この結果、印刷抵抗体の抵抗値が変わり、その値は比較
回路にて再チェックされ、最終的に所望の値を得る。As a result, the resistance value of the printed resistor changes, and the value is rechecked in the comparator circuit to finally obtain the desired value.
第６図は第４図の機能と第５図の機能を集約化した装置
である。FIG. 6 shows a device that integrates the functions of FIG. 4 and FIG. 5.
なお、ＬＥＤアレイに対しては、この様な機能を有する
複数の回路を設は装置化する事により得られる。Note that the LED array can be obtained by installing a plurality of circuits having such a function or converting it into a device.
（効果）
これらの装置をＬＥＤアレイの製造工程の中に入れる事
により、発光ばらつきの少ないＬＥＤアレイを作る事が
可能となり、また、印刷抵抗体にたいし、削るあるいは
導電ペーストにより抵抗調整を行うため部品管理等の複
雑化を防ぐ事ができ、低コストでＬＥＤアレイを作るこ
とができる。尚、第４図〜第６図の様な装置は製造と検
査を含んでいる為、工程の省略化が行われ更に効果を増
す。(Effects) By incorporating these devices into the manufacturing process of LED arrays, it is possible to create LED arrays with less variation in light emission, and the resistance of printed resistors can be adjusted by cutting or using conductive paste. Therefore, complexity in parts management etc. can be prevented, and LED arrays can be manufactured at low cost. Incidentally, since the apparatus shown in FIGS. 4 to 6 includes manufacturing and inspection, the process is omitted and the effect is further increased.
第１〜２図は配線基盤上に設けられた電極上に印刷され
た抵抗体を示し、（ｂ）は印刷抵抗体を印刷後削った状
態を示す図である。第３図は配線基盤上に設けられた電
極上に印刷された抵抗体に導電性ペーストを塗布して抵
抗値を調整した状態を示す。第４図は発光光度に対する
必要抵抗値を求める装置のブロック図、第５図は第４図
の出力を受は抵抗体の抵抗値を調整する装置のブロック
図、第６図は第４図の機能と第５図の機能を集約化した
装置を示すブロック図である。
璽、４・・・抵抗体、１’、４’・・・調整加工後の抵
抗体、２．３・・・電極、５・・・基板、６． ７．
８・・・導電性ペースト1 and 2 show a resistor printed on an electrode provided on a wiring board, and FIG. 1B shows a state in which the printed resistor is shaved after printing. FIG. 3 shows a state in which a conductive paste is applied to a resistor printed on an electrode provided on a wiring board to adjust the resistance value. Fig. 4 is a block diagram of a device for determining the required resistance value for luminous intensity, Fig. 5 is a block diagram of a device for adjusting the resistance value of a resistor that receives the output of Fig. 4, and Fig. 6 is a block diagram of a device for adjusting the resistance value of a resistor that receives the output of Fig. 4. FIG. 6 is a block diagram showing a device in which the functions and the functions of FIG. 5 are integrated; Seal, 4... Resistor, 1', 4'... Resistor after adjustment processing, 2.3... Electrode, 5... Substrate, 6. 7.
8... Conductive paste
Claims (1)
ＬＥＤ）を用いたＬＥＤアレイにたいし、各ＬＥＤに通
電する電流を抵抗体にて制限し、この抵抗体の増減にて
発光ばらつきをなくしたＬＥＤアレイ。 ２）抵抗体を印刷抵抗体とし、印刷後、抵抗体を削って
発光ばらつきをなくした特許請求の範囲第１項記載のＬ
ＥＤアレイ。 ３）抵抗体を印刷抵抗体とし、印刷後、導体を抵抗体上
に設けて電極間の抵抗を変え、発光ばらつきをなくした
特許請求の範囲第１項記載のＬＥＤアレイ。[Claims] 1) A light emitting diode (
This LED array uses a resistor to limit the current flowing through each LED, and eliminates variations in light emission by increasing or decreasing the resistor. 2) L according to claim 1, in which the resistor is a printed resistor, and after printing, the resistor is shaved to eliminate variations in light emission.
ED array. 3) The LED array according to claim 1, wherein the resistor is a printed resistor, and after printing, a conductor is provided on the resistor to change the resistance between the electrodes and eliminate variations in light emission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61286447A JPS63138788A (en) | 1986-12-01 | 1986-12-01 | Led array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61286447A JPS63138788A (en) | 1986-12-01 | 1986-12-01 | Led array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63138788A true JPS63138788A (en) | 1988-06-10 |
Family
ID=17704502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61286447A Pending JPS63138788A (en) | 1986-12-01 | 1986-12-01 | Led array |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63138788A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0802572A2 (en) * | 1996-04-20 | 1997-10-22 | ABBPATENT GmbH | SMD light emitting diode |
| JP2007080877A (en) * | 2005-09-09 | 2007-03-29 | Matsushita Electric Works Ltd | Color tone correcting method of led light source |
| JP2009503866A (en) * | 2005-07-29 | 2009-01-29 | ワールド・プロパティーズ・インコーポレイテッド | Needle-like ITO for LED arrays |
-
1986
- 1986-12-01 JP JP61286447A patent/JPS63138788A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0802572A2 (en) * | 1996-04-20 | 1997-10-22 | ABBPATENT GmbH | SMD light emitting diode |
| EP0802572B1 (en) * | 1996-04-20 | 2006-04-05 | ABB PATENT GmbH | Operation mode indicator with a surface-mounted-device type light source |
| JP2009503866A (en) * | 2005-07-29 | 2009-01-29 | ワールド・プロパティーズ・インコーポレイテッド | Needle-like ITO for LED arrays |
| JP2007080877A (en) * | 2005-09-09 | 2007-03-29 | Matsushita Electric Works Ltd | Color tone correcting method of led light source |
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