JPS5664523A - Telephone installed on travelling object with brightness control - Google Patents

Telephone installed on travelling object with brightness control

Info

Publication number
JPS5664523A
JPS5664523A JP13984479A JP13984479A JPS5664523A JP S5664523 A JPS5664523 A JP S5664523A JP 13984479 A JP13984479 A JP 13984479A JP 13984479 A JP13984479 A JP 13984479A JP S5664523 A JPS5664523 A JP S5664523A
Authority
JP
Japan
Prior art keywords
brightness
display unit
case
keyboard
ambient illuminance
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
JP13984479A
Other languages
Japanese (ja)
Inventor
Shinichi Shinohara
Akio Sasaki
Toshihide Komuro
Keiji Tanaka
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP13984479A priority Critical patent/JPS5664523A/en
Publication of JPS5664523A publication Critical patent/JPS5664523A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To prevent the fatigue of eyes, by giving a brightness control to both the keyboard illuminating light emitting substance and the display unit in accordance with the change of the ambient illuminance. CONSTITUTION:In case the ambient illuminance is high, the brightness of the display unit 3 is increased via the photo transistor 601, the control part 7, the decoder 8 and the driver 9 each. In this case, the keyboard illuminating light emitting substance 10 does not work. While in case the ambient illuminance is low, the keyboard illuminating switch is changed over to secure an illumination to the button face of the keyboard part 2. At the same time, the brightness of the display unit 3 is controlled so as not to stimulate the eyes through the transistor 601 and part 7 and via the decoder 8 and driver 9 each.
JP13984479A 1979-10-31 1979-10-31 Telephone installed on travelling object with brightness control Pending JPS5664523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13984479A JPS5664523A (en) 1979-10-31 1979-10-31 Telephone installed on travelling object with brightness control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13984479A JPS5664523A (en) 1979-10-31 1979-10-31 Telephone installed on travelling object with brightness control

Publications (1)

Publication Number Publication Date
JPS5664523A true JPS5664523A (en) 1981-06-01

Family

ID=15254828

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13984479A Pending JPS5664523A (en) 1979-10-31 1979-10-31 Telephone installed on travelling object with brightness control

Country Status (1)

Country Link
JP (1) JPS5664523A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899049A (en) * 1981-12-09 1983-06-13 Kokusai Electric Co Ltd Dial illuminating device for portable radio telephone set
JPS6064663U (en) * 1983-10-11 1985-05-08 株式会社日立製作所 Mobile phone with brightness switching
JPS61162172U (en) * 1985-03-28 1986-10-07
JPS62239724A (en) * 1986-04-12 1987-10-20 Hitachi Ltd Lighting system for cellular radio telephone set
US6299322B1 (en) 1999-05-06 2001-10-09 Nec Corporation Illuminating device for a portable radio apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899049A (en) * 1981-12-09 1983-06-13 Kokusai Electric Co Ltd Dial illuminating device for portable radio telephone set
JPS6064663U (en) * 1983-10-11 1985-05-08 株式会社日立製作所 Mobile phone with brightness switching
JPS61162172U (en) * 1985-03-28 1986-10-07
JPS62239724A (en) * 1986-04-12 1987-10-20 Hitachi Ltd Lighting system for cellular radio telephone set
US6299322B1 (en) 1999-05-06 2001-10-09 Nec Corporation Illuminating device for a portable radio apparatus

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