JPS5567255A - Remote control transmitter - Google Patents

Remote control transmitter

Info

Publication number
JPS5567255A
JPS5567255A JP13989478A JP13989478A JPS5567255A JP S5567255 A JPS5567255 A JP S5567255A JP 13989478 A JP13989478 A JP 13989478A JP 13989478 A JP13989478 A JP 13989478A JP S5567255 A JPS5567255 A JP S5567255A
Authority
JP
Japan
Prior art keywords
remote control
turned
leds
resistance
dry cell
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.)
Granted
Application number
JP13989478A
Other languages
Japanese (ja)
Other versions
JPS62621B2 (en
Inventor
Harushige Nakagaki
Shigeki Inoue
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13989478A priority Critical patent/JPS5567255A/en
Publication of JPS5567255A publication Critical patent/JPS5567255A/en
Publication of JPS62621B2 publication Critical patent/JPS62621B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Selective Calling Equipment (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To prevent reduction of the driving current for a LED to extend a remote control arrival distance by controlling the current limiting resistance of the infrared- ray LED according to voltage lowering of a dry element cell. CONSTITUTION:Transistors TR2 and 3 are turned on and off according to the output waveform of remote control operation part 11, and infrared-ray LEDs 9 and 10 transmit operation signals according to this turning-on and off. When the voltage of dry cell 1 becomes lower than the threshold of Zener diode ZD24, TR20 is turned off, and then, TR19 is turned on, and maximum current ip of LEDs 9 and 10 is flowed from dry cell 1 through TR19 and resistance 26. Thus, reduction of the driving current of LEDs is prevented by short-circuiting resistance 25 out of current limiting resistances for voltage lowering of dry cell 1.
JP13989478A 1978-11-15 1978-11-15 Remote control transmitter Granted JPS5567255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13989478A JPS5567255A (en) 1978-11-15 1978-11-15 Remote control transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13989478A JPS5567255A (en) 1978-11-15 1978-11-15 Remote control transmitter

Publications (2)

Publication Number Publication Date
JPS5567255A true JPS5567255A (en) 1980-05-21
JPS62621B2 JPS62621B2 (en) 1987-01-08

Family

ID=15256079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13989478A Granted JPS5567255A (en) 1978-11-15 1978-11-15 Remote control transmitter

Country Status (1)

Country Link
JP (1) JPS5567255A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2337652A (en) * 1998-03-30 1999-11-24 Nec Corp Infra-red communication terminal which decreases current used when remaining battery capacity is low

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01158165A (en) * 1987-12-15 1989-06-21 Ig Tech Res Inc Metallic panel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2337652A (en) * 1998-03-30 1999-11-24 Nec Corp Infra-red communication terminal which decreases current used when remaining battery capacity is low
GB2337652B (en) * 1998-03-30 2000-05-03 Nec Corp Mobile data terminal with an infrared communication capability
US6483622B1 (en) 1998-03-30 2002-11-19 Nec Corporation Mobile data terminal with an infrared communication capability

Also Published As

Publication number Publication date
JPS62621B2 (en) 1987-01-08

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