JPH01146248U - - Google Patents
Info
- Publication number
- JPH01146248U JPH01146248U JP4035688U JP4035688U JPH01146248U JP H01146248 U JPH01146248 U JP H01146248U JP 4035688 U JP4035688 U JP 4035688U JP 4035688 U JP4035688 U JP 4035688U JP H01146248 U JPH01146248 U JP H01146248U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- diode rows
- rows
- series
- 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
- 238000005286 illumination Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Facsimile Scanning Arrangements (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Description
第１図は本考案の一実施例を示す構成図、第２
図は従来の照明用光源の要部を示す構成図、第３
図は原稿走査用に使用した場合を示す説明図、第
４図は照度分布の状態を示す特性図である。
Ｄ１１〜Ｄｎｍ……ＬＥＤ（発光ダイオード）
、Ｌ１〜Ｌｎ……ＬＥＤ列Ｒ１〜ＶＲ３……可変
抵抗、Ｒ１〜Ｒｎ……固定抵抗、１……ＬＥＤア
レイ、２光センサ。
Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a configuration diagram showing the main parts of a conventional illumination light source.
The figure is an explanatory diagram showing a case where the apparatus is used for scanning a document, and FIG. 4 is a characteristic diagram showing the state of illuminance distribution. D 11 ~D nm ...LED (light emitting diode)
, L1 to Ln ...LED array R1 to VR3 ...variable resistance, R1 to Rn ...fixed resistance, 1...LED array, 2 optical sensors.
Claims (1)
イオード列を直線状に複数個並列接続して設けた
照明用光源において、前記直線状に設けた発光ダ
イオード列の中で両端部の発光ダイオード列に調
光用の可変抵抗を接続すると共に、他の内側の発
光ダイオード列には固定抵抗を接続し、且つこれ
らの発光ダイオード列の並列回路と直列に全体を
調光するための可変抵抗を接続したことを特徴と
する照明用光源。 In an illumination light source provided by linearly connecting a plurality of light emitting diode rows in parallel, in which a plurality of light emitting diodes are connected in series, the light emitting diode rows at both ends of the linearly provided light emitting diode rows are dimmed. In addition to connecting a variable resistor for the light emitting diode array, a fixed resistor was connected to the other inner light emitting diode rows, and a variable resistor was connected in series with the parallel circuit of these light emitting diode rows to dim the entire light. Characteristic lighting source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4035688U JPH01146248U (en) | 1988-03-29 | 1988-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4035688U JPH01146248U (en) | 1988-03-29 | 1988-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01146248U true JPH01146248U (en) | 1989-10-09 |
Family
ID=31266829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4035688U Pending JPH01146248U (en) | 1988-03-29 | 1988-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01146248U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04223762A (en) * | 1990-12-26 | 1992-08-13 | Rohm Co Ltd | Led array light source |
| JP2004207654A (en) * | 2002-12-26 | 2004-07-22 | Matsushita Electric Ind Co Ltd | Illuminator and driver circuit for illumination |
| JP2005117028A (en) * | 2003-09-16 | 2005-04-28 | Matsushita Electric Ind Co Ltd | Led illumination light source |
| WO2006112459A1 (en) * | 2005-04-18 | 2006-10-26 | Rohm Co., Ltd | Lighting device and display device using same |
| WO2007037036A1 (en) * | 2005-09-28 | 2007-04-05 | Sharp Kabushiki Kaisha | Light source device, backlight unit, and liquid crystal display device |
| WO2007037037A1 (en) * | 2005-09-28 | 2007-04-05 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display |
| JP2015201587A (en) * | 2014-04-10 | 2015-11-12 | 株式会社島津製作所 | semiconductor laser drive circuit |
-
1988
- 1988-03-29 JP JP4035688U patent/JPH01146248U/ja active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04223762A (en) * | 1990-12-26 | 1992-08-13 | Rohm Co Ltd | Led array light source |
| JP2004207654A (en) * | 2002-12-26 | 2004-07-22 | Matsushita Electric Ind Co Ltd | Illuminator and driver circuit for illumination |
| JP2005117028A (en) * | 2003-09-16 | 2005-04-28 | Matsushita Electric Ind Co Ltd | Led illumination light source |
| WO2006112459A1 (en) * | 2005-04-18 | 2006-10-26 | Rohm Co., Ltd | Lighting device and display device using same |
| WO2007037036A1 (en) * | 2005-09-28 | 2007-04-05 | Sharp Kabushiki Kaisha | Light source device, backlight unit, and liquid crystal display device |
| WO2007037037A1 (en) * | 2005-09-28 | 2007-04-05 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display |
| US7850358B2 (en) | 2005-09-28 | 2010-12-14 | Sharp Kabushiki Kaisha | Light source device, backlight unit, and liquid crystal display device |
| US7878698B2 (en) | 2005-09-28 | 2011-02-01 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device |
| JP2015201587A (en) * | 2014-04-10 | 2015-11-12 | 株式会社島津製作所 | semiconductor laser drive circuit |