JPS6417376A - Fluorescent tube - Google Patents

Fluorescent tube

Info

Publication number
JPS6417376A
JPS6417376A JP17236087A JP17236087A JPS6417376A JP S6417376 A JPS6417376 A JP S6417376A JP 17236087 A JP17236087 A JP 17236087A JP 17236087 A JP17236087 A JP 17236087A JP S6417376 A JPS6417376 A JP S6417376A
Authority
JP
Japan
Prior art keywords
grid
control function
cathode filament
thermionic emission
thermion
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
JP17236087A
Other languages
Japanese (ja)
Inventor
Satoru Tomita
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP17236087A priority Critical patent/JPS6417376A/en
Publication of JPS6417376A publication Critical patent/JPS6417376A/en
Pending legal-status Critical Current

Links

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

PURPOSE:To uniformize a luminance distribution in the longitudinal direction of a fluorescent tube with a simple structure by setting up a grid so as to provide the thermion acceleration control function conformed to the thermionic emission quantity of a cathode filament. CONSTITUTION:A grid 15 is set up so as to install the control function conformed to a thermionic emission distribution in the longitudinal direction of a cathode filament 7. And, a control function of the grid 15 at both ends, where voltage of the cathode filament 7 comes high, is made yet smaller, but the grid control function at the central part, where the cathode filament 7 voltage is low, is made so as to be larger. Consequently, with the thermion acceleration control function installed in the grid 15, electrons at both ends of the cathode filament 7, where thermionic emission quantity is abundant, are made to be collected at the central part of the cathode filament 7 in consequence, so that any drop in the thermionic emission quantity at the central part of the filament 7 is prevented from occurring. With this constitution, the thermion acceleration control function in the size conformed to size of the thermionic emission quantity is given to the grid 15, thus a light distribution is practically uniformized by a simple structure.
JP17236087A 1987-07-10 1987-07-10 Fluorescent tube Pending JPS6417376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17236087A JPS6417376A (en) 1987-07-10 1987-07-10 Fluorescent tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17236087A JPS6417376A (en) 1987-07-10 1987-07-10 Fluorescent tube

Publications (1)

Publication Number Publication Date
JPS6417376A true JPS6417376A (en) 1989-01-20

Family

ID=15940460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17236087A Pending JPS6417376A (en) 1987-07-10 1987-07-10 Fluorescent tube

Country Status (1)

Country Link
JP (1) JPS6417376A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8158755B2 (en) 2008-09-25 2012-04-17 Nitto Denko Corporation Production method of gelatin particles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8158755B2 (en) 2008-09-25 2012-04-17 Nitto Denko Corporation Production method of gelatin particles

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