JPS6286771U - - Google Patents
Info
- Publication number
- JPS6286771U JPS6286771U JP17739085U JP17739085U JPS6286771U JP S6286771 U JPS6286771 U JP S6286771U JP 17739085 U JP17739085 U JP 17739085U JP 17739085 U JP17739085 U JP 17739085U JP S6286771 U JPS6286771 U JP S6286771U
- Authority
- JP
- Japan
- Prior art keywords
- linear light
- light source
- reading device
- image reading
- document surface
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Facsimile Scanning Arrangements (AREA)
Description
第１図ａは本考案の一実施例に係る画像読取装
置の光源の構成図、第１図ｂはその駆動回路の回
路図、第２図は光量計算のための説明図、第３図
は上記光源による相対光量を示すグラフ図、第４
図は駆動信号の説明図、第５図は従来の画像読取
装置の一構成図、第６図は第５図における相対光
量を示すグラフ図である。
１……線状光源、５……マイクロプロセツサ（
ＣＰＵ）、＃１〜＃１５……ブロツク、Ｒ１〜Ｒ
１５……抵抗、Ｄ１〜Ｄ６……発光ダイオード（
ＬＥＤ）、Ｔｒ１〜Ｔｒ１５……トランジスタ。
FIG. 1a is a configuration diagram of a light source of an image reading device according to an embodiment of the present invention, FIG. 1b is a circuit diagram of its driving circuit, FIG. 2 is an explanatory diagram for calculating the amount of light, and FIG. Graph diagram showing the relative light amount by the above light source, No. 4
FIG. 5 is an explanatory diagram of drive signals, FIG. 5 is a configuration diagram of a conventional image reading device, and FIG. 6 is a graph diagram showing the relative light amount in FIG. 5. 1... Linear light source, 5... Microprocessor (
CPU), #1 to #15...Block, R1 to R
15...Resistor, D1-D6...Light emitting diode (
LED), Tr 1 to Tr 15 ... transistors.
Claims (1)
し、その反射光をレンズを含む縮小光学系を介し
てラインイメージセンサに収束する画像読取装置
において、複数の発光ダイオードを所定間隔で上
記原稿面の読取幅に配列して線状光源を形成する
と共に、この線状光源を複数のブロツクに分割し
、それらのブロツクに、上記レンズの光軸からの
距離に対応したデユーテイのパルス状駆動電流を
供給する駆動電流供給回路を設けたことを特徴と
する画像読取装置。 In an image reading device that illuminates a document surface along the scanning direction with a linear light source and converges the reflected light onto a line image sensor via a reduction optical system including a lens, a plurality of light emitting diodes are arranged at predetermined intervals to illuminate the document surface. A linear light source is formed by arranging the linear light sources with a reading width of An image reading device comprising a drive current supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17739085U JPS6286771U (en) | 1985-11-20 | 1985-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17739085U JPS6286771U (en) | 1985-11-20 | 1985-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6286771U true JPS6286771U (en) | 1987-06-03 |
Family
ID=31118547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17739085U Pending JPS6286771U (en) | 1985-11-20 | 1985-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286771U (en) |
-
1985
- 1985-11-20 JP JP17739085U patent/JPS6286771U/ja active Pending
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