JPH02100944U - - Google Patents

Info

Publication number
JPH02100944U
JPH02100944U JP1038889U JP1038889U JPH02100944U JP H02100944 U JPH02100944 U JP H02100944U JP 1038889 U JP1038889 U JP 1038889U JP 1038889 U JP1038889 U JP 1038889U JP H02100944 U JPH02100944 U JP H02100944U
Authority
JP
Japan
Prior art keywords
voltage
outputs
triangular wave
section
logarithmic conversion
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
JP1038889U
Other languages
English (en)
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 filed Critical
Priority to JP1038889U priority Critical patent/JPH02100944U/ja
Publication of JPH02100944U publication Critical patent/JPH02100944U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Description

【図面の簡単な説明】
図面は本考案の一実施例を示すもので、第1図
は本考案の実施例を示す回路ブロツク図、第2図
乃至第8図は各部における特性図である。 A……センサ電圧、B……三角波電圧、C……
検出電圧、D……基準電圧、1……外光検出部、
2……遅延回路部、3……第1対数変換部、4…
…三角波発生部、5……第2対数変換部、6……
比較部。

Claims (1)

    【実用新案登録請求の範囲】
  1. 周囲の明るさを検出してそれに応じたセンサ電
    圧を出力する外光検出部と、このセンサ電圧を対
    数変換して検出電圧を出力する第1対数変換部と
    、三角波電圧を出力する三角波発生部と、この三
    角波電圧を対数変換して基準電圧を出力する第2
    対数変換部と、前記検出電圧に対する前記基準電
    圧の電圧レベルを比較してそのレベルに応じて表
    示装置の発光輝度を調整する矩形波電圧である出
    力電圧を出力する比較部とを設けたことを特徴と
    する車輌用調光装置。
JP1038889U 1989-01-31 1989-01-31 Pending JPH02100944U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1038889U JPH02100944U (ja) 1989-01-31 1989-01-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1038889U JPH02100944U (ja) 1989-01-31 1989-01-31

Publications (1)

Publication Number Publication Date
JPH02100944U true JPH02100944U (ja) 1990-08-10

Family

ID=31218007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1038889U Pending JPH02100944U (ja) 1989-01-31 1989-01-31

Country Status (1)

Country Link
JP (1) JPH02100944U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012178708A (ja) * 2011-02-25 2012-09-13 Rohm Co Ltd 発光装置用信号処理回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012178708A (ja) * 2011-02-25 2012-09-13 Rohm Co Ltd 発光装置用信号処理回路

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