JPH01135495U - - Google Patents

Info

Publication number
JPH01135495U
JPH01135495U JP3062588U JP3062588U JPH01135495U JP H01135495 U JPH01135495 U JP H01135495U JP 3062588 U JP3062588 U JP 3062588U JP 3062588 U JP3062588 U JP 3062588U JP H01135495 U JPH01135495 U JP H01135495U
Authority
JP
Japan
Prior art keywords
display tube
fluorescent display
circuit
point
terminal
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
JP3062588U
Other languages
Japanese (ja)
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 JP3062588U priority Critical patent/JPH01135495U/ja
Publication of JPH01135495U publication Critical patent/JPH01135495U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、この考案の好適な実施例を示す電気
回路図である。第2図は、第1図に示す蛍光表示
管のデイジタル数字パターンを示す説明図である
。第3図は、第1図に示す回路の各点の特性図で
あり、第3図Aは○a点の電圧波形を示し、第3
図Bは○b点及び○c点の電圧波形を示し、第3
図Cは○d点の電圧波形を示し、第3図Dは蛍光
表示管の発光状態をそれぞれ示したものである。
第4図は、第1図に示す蛍光表示管から発生され
る電磁ノイズの測定装置を示す説明図である。第
5図は、第1図に示す蛍光表示管から発生される
電磁ノイズのスペクトル分布を示す特性図である
。第6図は、従来の技術による電磁ノイズのスペ
クトル分布特性図である。 1…蛍光表示管、2…デユーテイパルス発生回
路、3…表示信号発生回路、4…ライト回路、2
1…調光レベル設定回路、22…積分回路、23
…比較回路、211…イルミネーシヨンコントロ
ーラ。
FIG. 1 is an electrical circuit diagram showing a preferred embodiment of this invention. FIG. 2 is an explanatory diagram showing the digital number pattern of the fluorescent display tube shown in FIG. 1. Fig. 3 is a characteristic diagram of each point of the circuit shown in Fig. 1, and Fig. 3A shows the voltage waveform at point ○a;
Figure B shows the voltage waveforms at point ○b and point ○c.
Figure C shows the voltage waveform at point ○d, and Figure 3D shows the light emitting state of the fluorescent display tube.
FIG. 4 is an explanatory diagram showing an apparatus for measuring electromagnetic noise generated from the fluorescent display tube shown in FIG. 1. FIG. 5 is a characteristic diagram showing the spectral distribution of electromagnetic noise generated from the fluorescent display tube shown in FIG. FIG. 6 is a spectral distribution characteristic diagram of electromagnetic noise according to a conventional technique. 1... Fluorescent display tube, 2... Duty pulse generation circuit, 3... Display signal generation circuit, 4... Light circuit, 2
1... Dimming level setting circuit, 22... Integrating circuit, 23
...Comparison circuit, 211...Illumination controller.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] セグメント端子及びグリツト端子を備えた蛍光
表示管と、該蛍光表示管のグリツド端子に接続さ
れたデユーテイパルス発生回路とによつて構成さ
れたことを特徴とする蛍光表示管の調光装置。
1. A light control device for a fluorescent display tube, comprising a fluorescent display tube equipped with a segment terminal and a grid terminal, and a duty pulse generation circuit connected to the grid terminal of the fluorescent display tube.
JP3062588U 1988-03-08 1988-03-08 Pending JPH01135495U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3062588U JPH01135495U (en) 1988-03-08 1988-03-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3062588U JPH01135495U (en) 1988-03-08 1988-03-08

Publications (1)

Publication Number Publication Date
JPH01135495U true JPH01135495U (en) 1989-09-18

Family

ID=31255848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3062588U Pending JPH01135495U (en) 1988-03-08 1988-03-08

Country Status (1)

Country Link
JP (1) JPH01135495U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933091B2 (en) * 1978-06-23 1984-08-13 積水化学工業株式会社 Method for manufacturing bent pipes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933091B2 (en) * 1978-06-23 1984-08-13 積水化学工業株式会社 Method for manufacturing bent pipes

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