JPS57167690A - Control of light-emitting diode - Google Patents

Control of light-emitting diode

Info

Publication number
JPS57167690A
JPS57167690A JP5365981A JP5365981A JPS57167690A JP S57167690 A JPS57167690 A JP S57167690A JP 5365981 A JP5365981 A JP 5365981A JP 5365981 A JP5365981 A JP 5365981A JP S57167690 A JPS57167690 A JP S57167690A
Authority
JP
Japan
Prior art keywords
diode
light
color
diodes
period
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
Application number
JP5365981A
Other languages
Japanese (ja)
Inventor
Satoshi Nakazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOUA TOKUSHIYU DENKI KK
Toa Corp
Toa Tokushu Denki KK
Original Assignee
TOUA TOKUSHIYU DENKI KK
Toa Electric Co Ltd
Toa Tokushu Denki KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TOUA TOKUSHIYU DENKI KK, Toa Electric Co Ltd, Toa Tokushu Denki KK filed Critical TOUA TOKUSHIYU DENKI KK
Priority to JP5365981A priority Critical patent/JPS57167690A/en
Publication of JPS57167690A publication Critical patent/JPS57167690A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Led Devices (AREA)

Abstract

PURPOSE:To enable to control two light-emitting diodes simultaneously by a method wherein a current circuit setting diode is antiparallel-connected to each of two-color light-emitting diodes, and the color of emitted light is controlled in accordance with the duty ratio of a pulse AC power source. CONSTITUTION:When an AC current is applied during the period tp where the power source is in positive state and the voltage exceeds the forward voltage drop of the green light-emitting diode Dg and the currents setting diode Dp, the diodes Dg and Dp are conducted. At this time, the current on the red light-emitting diode Dr and the current setting diode Dn are broken, and the diode Dg alone emits light. In the negative period tn, diodes Dr and Dn are conduted. At this time, diodes Dg and Dp are cut off and the diode Dr alone emits light. When the period of the negative voltage tn is extremely reduced to a short time by changing the duty ratio of the power source Ep, the gree color only of the diode Dg is seen, and in contrast with this, when the period of positive voltage tp is extremely shortened, red color only is seen. When the duty ratio is set at 50%, the green and red colors are mixed and yellow color is seen.
JP5365981A 1981-04-07 1981-04-07 Control of light-emitting diode Pending JPS57167690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5365981A JPS57167690A (en) 1981-04-07 1981-04-07 Control of light-emitting diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5365981A JPS57167690A (en) 1981-04-07 1981-04-07 Control of light-emitting diode

Publications (1)

Publication Number Publication Date
JPS57167690A true JPS57167690A (en) 1982-10-15

Family

ID=12948977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5365981A Pending JPS57167690A (en) 1981-04-07 1981-04-07 Control of light-emitting diode

Country Status (1)

Country Link
JP (1) JPS57167690A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6081878A (en) * 1983-10-11 1985-05-09 Shinyoushiya:Kk Emitting light color controlling method of composite light emitting diode
JPH01173660A (en) * 1987-12-28 1989-07-10 Stanley Electric Co Ltd Two-color radiating led
US6304060B1 (en) * 2000-02-22 2001-10-16 James U. Dernehl Status indicator for battery charger
US7009199B2 (en) 2002-10-22 2006-03-07 Cree, Inc. Electronic devices having a header and antiparallel connected light emitting diodes for producing light from AC current
JP2007511903A (en) * 2003-11-13 2007-05-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Resonant power LED control circuit with brightness and color tone adjustment
JP2012169625A (en) * 2011-02-11 2012-09-06 Tai-Her Yang Led device
JP2012178559A (en) * 2011-02-11 2012-09-13 Tai-Her Yang Led device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842536U (en) * 1971-09-20 1973-05-31
JPS5491100A (en) * 1977-12-28 1979-07-19 Seiko Instr & Electronics Ltd Adjusting mechanism for brightness of luminous element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842536U (en) * 1971-09-20 1973-05-31
JPS5491100A (en) * 1977-12-28 1979-07-19 Seiko Instr & Electronics Ltd Adjusting mechanism for brightness of luminous element

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6081878A (en) * 1983-10-11 1985-05-09 Shinyoushiya:Kk Emitting light color controlling method of composite light emitting diode
JPH01173660A (en) * 1987-12-28 1989-07-10 Stanley Electric Co Ltd Two-color radiating led
US6304060B1 (en) * 2000-02-22 2001-10-16 James U. Dernehl Status indicator for battery charger
US7009199B2 (en) 2002-10-22 2006-03-07 Cree, Inc. Electronic devices having a header and antiparallel connected light emitting diodes for producing light from AC current
JP2007511903A (en) * 2003-11-13 2007-05-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Resonant power LED control circuit with brightness and color tone adjustment
JP2012169625A (en) * 2011-02-11 2012-09-06 Tai-Her Yang Led device
JP2012178559A (en) * 2011-02-11 2012-09-13 Tai-Her Yang Led device

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