JPS5960848A - Prevention of luminance inclination in fluorescent character display tube - Google Patents

Prevention of luminance inclination in fluorescent character display tube

Info

Publication number
JPS5960848A
JPS5960848A JP17257582A JP17257582A JPS5960848A JP S5960848 A JPS5960848 A JP S5960848A JP 17257582 A JP17257582 A JP 17257582A JP 17257582 A JP17257582 A JP 17257582A JP S5960848 A JPS5960848 A JP S5960848A
Authority
JP
Japan
Prior art keywords
filament
display tube
voltage
inclination
driven
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
JP17257582A
Other languages
Japanese (ja)
Inventor
Tokuji Kanamonoya
金物谷　徳二
Kanji Yoshimoto
由本　幹治
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP17257582A priority Critical patent/JPS5960848A/en
Publication of JPS5960848A publication Critical patent/JPS5960848A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/15—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen with ray or beam selectively directed to luminescent anode segments

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

PURPOSE:To check luminance inclination with simple constitution when a fluorescent character display tube of filament AC voltage driving type is driven by DC voltage, by preparing inclination to the thickness of a filter to be arranged on the side of the display surface. CONSTITUTION:The inclination balanced with the luminance inclination is provided to the thickness of a filter to be prepared on the side of the display surface. Thereby, when a fluorescent character display tube of filament AC voltage driving type is driven by DC volage, the luminance inclination can be checked even when potential difference is always generated between both ends of the filament 3.

Description

【発明の詳細な説明】 く技術分野〉 本発明は、フィラメント交流電圧駆動型螢光表示管を直
流電圧駆動する場合（フィラメント電源として直流電源
を用いる場合）に生じる輝度傾斜の防止方法に関するも
のである。[Detailed Description of the Invention] Technical Field The present invention relates to a method for preventing brightness gradient that occurs when a filament AC voltage driven fluorescent display tube is driven with DC voltage (when a DC power source is used as the filament power source). be.

〈発明の背景〉 第１図はフィラメント交流電圧駆動型螢光表示管を直流
電圧駆動する場合の構成を示す図である。<Background of the Invention> FIG. 1 is a diagram showing the configuration of a filament AC voltage-driven fluorescent display tube driven by DC voltage.

図に於て、１はアノード・セグメント、２はグリッド、
３はフィラメント、４はフィラメント電源、５はアノー
ド・セグメント、グリッド共通電払 源、６はセグメント選択回路、７は静電子である。In the figure, 1 is the anode segment, 2 is the grid,
3 is a filament, 4 is a filament power source, 5 is an anode segment, a grid common power supply source, 6 is a segment selection circuit, and 7 is an electrostatic electron.

第１図に示すように、フィラメント交流電圧駆動型螢光
表示管を直流電圧駆動すると、第２図に示すように、フ
ィラメント両端間に常にＶｌ　＝Ｖ２−ｖ３　　の電位
差が生じることになり、このために輝度傾斜が生じる。As shown in Figure 1, when a filament AC voltage-driven fluorescent display tube is driven with DC voltage, a potential difference of Vl = V2-v3 always occurs between both ends of the filament, as shown in Figure 2. Therefore, a brightness gradient occurs.

なお、第２図に於て、ｖｏはグリッド電位、ｖＦはフィ
ラメント電位、ｖｏはフィラメント電源電圧、ｖｏＮは
セグメント・オン電圧、ｖｏＰＦはセグメント・オフ電
位である。In FIG. 2, vo is the grid potential, vF is the filament potential, vo is the filament power supply voltage, voN is the segment on voltage, and voPF is the segment off potential.

〈発明の目的〉 本発明は上記輝度傾斜を防止することを目的としてなさ
れたものである。<Object of the Invention> The present invention has been made for the purpose of preventing the above-mentioned brightness gradient.

〈発明の構成〉 上記輝度傾斜を防止するために、第３図（断面図）及び
第４図（外観斜視図）に示すように、表示面側に設けら
れるフィルタ８の肉厚に、輝度傾斜に児合った傾斜を設
ける構成とした。なお、９はアノード・セグメント１上
に設けられる螢光塗料である。<Structure of the Invention> In order to prevent the brightness gradient described above, as shown in FIG. 3 (cross-sectional view) and FIG. The structure was designed to provide an inclination that suits the needs of children. Note that 9 is a fluorescent paint provided on the anode segment 1.

〈効　果〉 以上説明したように、本発明によれば、きわめて簡単な
構成で、フィラメント交流電圧駆動型螢光表示管を直流
電圧駆動する場合に於ける輝度傾斜を防止することがで
きるものである。<Effects> As explained above, according to the present invention, with an extremely simple configuration, it is possible to prevent brightness gradient when driving a filament AC voltage driven fluorescent display tube with DC voltage. be.

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

第１図はフィラメント交流電圧駆動型螢光表示管を直流
電圧駆動する場合の構成を示す図、第２図は第１図に於
ける各電位関係を示す図、第３図は本発明を実施した螢
光表示管の断面図、第４図は同外観斜視図である。 符号の説明 １ニアノード・セグメント、　　２ニゲリツド、３：フ
ィラメント、４：フィラメント電源、　５ニアノード・
セグメント、グリッド共通電源、６：セグメント選択回
路、　７：熱電子、゛　８：フィルタ、　９：螢光塗料
。 代理人　弁理士　福　士　愛　彦（他２名）（３）Fig. 1 is a diagram showing the configuration of a filament AC voltage-driven fluorescent display tube driven by DC voltage, Fig. 2 is a diagram showing each potential relationship in Fig. 1, and Fig. 3 is a diagram showing the implementation of the present invention. FIG. 4 is a cross-sectional view of the fluorescent display tube, and FIG. 4 is a perspective view of the same. Explanation of symbols 1 Near node segment, 2 Nigelid, 3: Filament, 4: Filament power supply, 5 Near node
Segment, grid common power supply, 6: Segment selection circuit, 7: Thermionic, 8: Filter, 9: Fluorescent paint. Agent Patent attorney Aihiko Fukushi (and 2 others) (3)

Claims (1)

【特許請求の範囲】[Claims] １、　フィラメント交流電圧駆動型螢光表示管を直流電
圧駆動する場合に生じる輝度傾斜を、表示面側に配置さ
れるフィルタの肉厚に傾斜を設ける構成とすることによ
って防止するようにしたことを特徴とする、螢光表示管
に於ける輝度傾斜防止方法。1. The luminance gradient that occurs when a filament AC voltage-driven fluorescent display tube is driven by DC voltage is prevented by providing a configuration in which the thickness of the filter disposed on the display surface side is sloped. A method for preventing brightness gradient in a fluorescent display tube.
JP17257582A 1982-09-29 1982-09-29 Prevention of luminance inclination in fluorescent character display tube Pending JPS5960848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17257582A JPS5960848A (en) 1982-09-29 1982-09-29 Prevention of luminance inclination in fluorescent character display tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17257582A JPS5960848A (en) 1982-09-29 1982-09-29 Prevention of luminance inclination in fluorescent character display tube

Publications (1)

Publication Number Publication Date
JPS5960848A true JPS5960848A (en) 1984-04-06

Family

ID=15944372

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17257582A Pending JPS5960848A (en) 1982-09-29 1982-09-29 Prevention of luminance inclination in fluorescent character display tube

Country Status (1)

Country Link
JP (1) JPS5960848A (en)

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