JPH0480075U - - Google Patents
Info
- Publication number
- JPH0480075U JPH0480075U JP12561290U JP12561290U JPH0480075U JP H0480075 U JPH0480075 U JP H0480075U JP 12561290 U JP12561290 U JP 12561290U JP 12561290 U JP12561290 U JP 12561290U JP H0480075 U JPH0480075 U JP H0480075U
- Authority
- JP
- Japan
- Prior art keywords
- led
- driving
- semiconductor device
- temperature fluctuation
- adjusted
- 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
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Communication System (AREA)
Description
第１図はこの考案の一実施例であるＬＥＤ駆動
用半導体装置の回路図、第２図は従来のＬＥＤ駆
動用半導体装置のブロツク図、第３図はＬＥＤ駆
動電流の温度変動特性曲線図、第４図はＬＥＤ駆
動電流を一定とした時の発光強度の温度変動特性
曲線図である。
図において、２はＬＥＤ駆動装置、３はバンド
ギヤツプ回路、４はＬＥＤを示す。尚、図中、同
一符号は同一、又は相当部分を示す。
FIG. 1 is a circuit diagram of a semiconductor device for driving an LED, which is an embodiment of the invention, FIG. 2 is a block diagram of a conventional semiconductor device for driving an LED, and FIG. 3 is a diagram of a temperature fluctuation characteristic curve of an LED driving current. FIG. 4 is a temperature variation characteristic curve of light emission intensity when the LED drive current is constant. In the figure, 2 is an LED driving device, 3 is a bandgap circuit, and 4 is an LED. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
て、ＬＥＤ駆動電流の温度変動勾配をバンドギヤ
ツプ回路により調整するようにしたことを特徴と
するＬＥＤ駆動用半導体装置。 1. A semiconductor device for driving an LED in optical communication, characterized in that the temperature fluctuation gradient of the LED driving current is adjusted by a band gap circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12561290U JPH0480075U (en) | 1990-11-27 | 1990-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12561290U JPH0480075U (en) | 1990-11-27 | 1990-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0480075U true JPH0480075U (en) | 1992-07-13 |
Family
ID=31873204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12561290U Pending JPH0480075U (en) | 1990-11-27 | 1990-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0480075U (en) |
-
1990
- 1990-11-27 JP JP12561290U patent/JPH0480075U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0480075U (en) | ||
| JPH0296752U (en) | ||
| JPH0461804U (en) | ||
| JPS631366U (en) | ||
| JPS5875132U (en) | Vehicle lighting system | |
| JPH0416620U (en) | ||
| JPH0324873U (en) | ||
| JPS60102898U (en) | Light source light intensity adjustment device for panel picture area ratio measuring device | |
| JPH0440316U (en) | ||
| JPS6098295U (en) | Window lighting device | |
| JPH025296U (en) | ||
| JPH0284298U (en) | ||
| JPS59138855U (en) | Photographic lighting equipment | |
| JPS62173198U (en) | ||
| JPS6433009U (en) | ||
| JPH0475695U (en) | ||
| JPH0394554U (en) | ||
| JPH0359768U (en) | ||
| JPH0382414U (en) | ||
| JPS6157552U (en) | ||
| JPS59122788U (en) | High voltage output current control circuit | |
| JPH01174891U (en) | ||
| JPS6280364U (en) | ||
| JPH0439826U (en) | ||
| JPS59142143U (en) | Automotive lighting device using optical transmission |