JPS61138259U - - Google Patents
Info
- Publication number
- JPS61138259U JPS61138259U JP1985020514U JP2051485U JPS61138259U JP S61138259 U JPS61138259 U JP S61138259U JP 1985020514 U JP1985020514 U JP 1985020514U JP 2051485 U JP2051485 U JP 2051485U JP S61138259 U JPS61138259 U JP S61138259U
- Authority
- JP
- Japan
- Prior art keywords
- rectangular wave
- light emitting
- emitting diode
- duty ratio
- drive circuit
- 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 1
- 238000010586 diagram Methods 0.000 description 6
Description
第１図乃至第３図は本考案に係る発光ダイオー
ド駆動回路の実施例を示し、第１図はブロツク図
、第２図は動作説明のための波形図、第３図はデ
ユーテイー比と各発光ダイオードの輝度との関係
を示すグラフ、第４図乃至第６図は従来の発光ダ
イオード駆動回路を示し、第４図は発光ダイオー
ドの印加電圧／輝度特性図、第５図は回路図、第
６図は第５図に示す回路図における印加電圧／輝
度特性図である。
１：矩形波出力回路、２：矩形波制御回路、Ｄ
１，Ｄ２：発光ダイオード。
1 to 3 show an embodiment of the light emitting diode drive circuit according to the present invention. FIG. 1 is a block diagram, FIG. 2 is a waveform diagram for explaining the operation, and FIG. 3 is a duty ratio and each light emitting circuit. Graphs showing the relationship with the luminance of the diode, Figures 4 to 6 show conventional light emitting diode drive circuits, Figure 4 is a diagram of applied voltage/luminance characteristics of the light emitting diode, Figure 5 is a circuit diagram, and Figure 6 This figure is an applied voltage/luminance characteristic diagram in the circuit diagram shown in FIG. 5. 1: Square wave output circuit, 2: Square wave control circuit, D
1, D2: Light emitting diode.
Claims (1)
と、矩形波を出力し得る矩形波出力回路と、その
出力矩形派のデユーテイー比を変化せしめるため
の矩形波制御部とを備え、上記発光ダイオードは
入力矩形波の電位に応じて夫々交互に点灯せしめ
られるとともに、そのデユーテイー比に応じて発
光輝度が反比例的に増減されるように構成されて
いることを特徴とする発光ダイオード駆動回路。 It includes two light emitting diodes connected in parallel with opposite polarities, a rectangular wave output circuit capable of outputting a rectangular wave, and a rectangular wave control section for changing the duty ratio of the output rectangular wave. 1. A light emitting diode drive circuit characterized in that the light emitting diode drive circuit is configured so that the light emitting diodes are turned on alternately according to the potential of a rectangular wave, and the luminance of light emission is increased or decreased in inverse proportion to the duty ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020514U JPS61138259U (en) | 1985-02-18 | 1985-02-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020514U JPS61138259U (en) | 1985-02-18 | 1985-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61138259U true JPS61138259U (en) | 1986-08-27 |
Family
ID=30511071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985020514U Pending JPS61138259U (en) | 1985-02-18 | 1985-02-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61138259U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297888A (en) * | 2000-04-13 | 2001-10-26 | Ado System Kk | Light emitting diode circuit used for light |
| WO2011126106A1 (en) | 2010-04-09 | 2011-10-13 | 三菱化学株式会社 | Light dimming apparatus and led illumination system |
-
1985
- 1985-02-18 JP JP1985020514U patent/JPS61138259U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297888A (en) * | 2000-04-13 | 2001-10-26 | Ado System Kk | Light emitting diode circuit used for light |
| JP4546611B2 (en) * | 2000-04-13 | 2010-09-15 | アドシステム株式会社 | LED circuit for lighting |
| WO2011126106A1 (en) | 2010-04-09 | 2011-10-13 | 三菱化学株式会社 | Light dimming apparatus and led illumination system |
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