JPH0545010Y2 - - Google Patents
Info
- Publication number
- JPH0545010Y2 JPH0545010Y2 JP9259187U JP9259187U JPH0545010Y2 JP H0545010 Y2 JPH0545010 Y2 JP H0545010Y2 JP 9259187 U JP9259187 U JP 9259187U JP 9259187 U JP9259187 U JP 9259187U JP H0545010 Y2 JPH0545010 Y2 JP H0545010Y2
- Authority
- JP
- Japan
- Prior art keywords
- shielding plate
- fluorescent display
- conductive film
- cover glass
- display tube
- 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.)
- Expired - Lifetime
Links
- 239000006059 cover glass Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は蛍光表示管に係り、特に駆動回路内蔵
形蛍光表示管の放射電子の遮蔽板に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fluorescent display tube, and more particularly to a shielding plate for emitted electrons in a fluorescent display tube with a built-in drive circuit.
従来のこの種の蛍光表示管は、第３図に示すよ
うに、導電膜３を内面に形成したカバーガラス１
を設け、導電膜３と端子４を会して電気的に接続
された電極フレーム５を設け、このフレーム５に
カソード６を設け、さらに遮蔽板２、駆動回路７
を設けている。
As shown in FIG. 3, a conventional fluorescent display tube of this type has a cover glass 1 with a conductive film 3 formed on its inner surface.
An electrode frame 5 is provided in which the conductive film 3 and the terminal 4 are brought together and electrically connected, a cathode 6 is provided on this frame 5, and a shielding plate 2 and a drive circuit 7 are provided.
has been established.
ここで、従来の蛍光表示管は、同図に示すよう
に、放射電子の遮蔽板２を電極フレーム５の一部
に直接接続して、アース電位に安定させるか、ア
ース電位に接続が困難な場合は、第４図に示すよ
うに、駆動回路７を覆つた単に遮蔽板２のみで、
アース電位は取らない構造となつていた。 As shown in the figure, in conventional fluorescent display tubes, the radiation electron shielding plate 2 is directly connected to a part of the electrode frame 5 to stabilize it at the ground potential, or it is difficult to connect it to the ground potential. In this case, as shown in FIG. 4, only the shielding plate 2 covering the drive circuit 7 is used.
The structure was such that no earth potential was taken.
前述した従来の蛍光表示管の放射電子の遮蔽板
２の形成構造は、前者では電極フレーム５の一部
に接続してアース電位に安定させる必要から、駆
動回路７の位置が電極フレーム５のアース部近く
に限られてしまうという構造上の欠点や、後者即
ちアース電位に安定させることが困難な場合に
は、アースを取らないために、カソード６より放
射される電子から駆動回路７を完全には遮蔽する
ことができないため，駆動回路７が悪影響を受け
る場合があるという信頼性上の欠点があつた。
The formation structure of the radiation electron shielding plate 2 of the conventional fluorescent display tube described above is such that the drive circuit 7 is located close to the ground of the electrode frame 5 because in the former case it is necessary to connect it to a part of the electrode frame 5 to stabilize it at the ground potential. If the latter is difficult to stabilize at the ground potential, the drive circuit 7 is completely protected from the electrons emitted from the cathode 6 in order to avoid grounding. Since it cannot be shielded, there is a drawback in terms of reliability in that the drive circuit 7 may be adversely affected.
本考案の目的は、前記欠点が解決され、駆動回
路の設置位置がアース部近くに限定されず、しか
も良好に遮蔽することができるようにした蛍光表
示管を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a fluorescent display tube in which the above-mentioned drawbacks are solved, the installation position of the driving circuit is not limited to the vicinity of the grounding part, and the driving circuit can be well shielded.
本考案の構成は、カバーガラスの内部に駆動回
路を設け、カソードより放射される電子から、前
記駆動回路を遮蔽する遮蔽板を設けた蛍光表示管
において、前記カバーガラスの内面に導電膜が形
成され、前記遮蔽板が前記導電膜に電気的及び機
械的に接続されていることを特徴とする。
The structure of the present invention is a fluorescent display tube in which a drive circuit is provided inside a cover glass and a shield plate is provided to shield the drive circuit from electrons emitted from a cathode, in which a conductive film is formed on the inner surface of the cover glass. and the shielding plate is electrically and mechanically connected to the conductive film.
次に本考案について図面を参照しながら詳細に
説明する。
Next, the present invention will be explained in detail with reference to the drawings.
第１図は本考案の第１の実施例の蛍光表示管の
部分の断面図である。同図において、カバーガラ
ス１の内面に、遮蔽板２が取付けてあり、この遮
蔽板２はカバーガラス１の内面に塗布された導電
膜３に電気的及び機械的に接続されており、この
導電膜３を介して、端子４により電極フレーム５
のアース電位に接続される。カソード６より放射
された電子は、内蔵の駆動回路７に一部漏れてい
こうとするが、前記遮蔽板２によつて、良好に遮
蔽される。 FIG. 1 is a sectional view of a portion of a fluorescent display tube according to a first embodiment of the present invention. In the figure, a shielding plate 2 is attached to the inner surface of a cover glass 1, and this shielding plate 2 is electrically and mechanically connected to a conductive film 3 coated on the inner surface of the cover glass 1. The terminal 4 connects the electrode frame 5 through the membrane 3.
connected to ground potential. Some of the electrons emitted from the cathode 6 tend to leak into the built-in drive circuit 7, but are effectively shielded by the shielding plate 2.
第２図は本考案の第２の実施例の蛍光表示管の
部分の断面図である。同図において、遮蔽板２か
ら、導電膜３を介して、プラス電源８と抵抗９等
を通じて電気的に接続している。このプラス電位
を与えることにより、カソード６より放射され
て、一部駆動回路７に漏れていこうとする電子
を、この遮蔽板２にとらえられる。 FIG. 2 is a sectional view of a portion of a fluorescent display tube according to a second embodiment of the present invention. In the figure, a shielding plate 2 is electrically connected to a positive power source 8 through a resistor 9 and the like via a conductive film 3. By applying this positive potential, electrons emitted from the cathode 6 and partially leaking to the drive circuit 7 can be captured by the shielding plate 2.
いずれも本実施例では、前記従来の欠点をなく
すために、カバーガラス１の内面に、金属からな
る遮蔽板２を取付け、カバーガラス１の内面に塗
布された導電膜３と接続し、端子４を介して、さ
らに導電膜３とアース電位とを接続する構造とな
つている。 In both cases, in this embodiment, in order to eliminate the drawbacks of the conventional methods, a shielding plate 2 made of metal is attached to the inner surface of the cover glass 1, connected to the conductive film 3 coated on the inner surface of the cover glass 1, and the terminal 4 is connected to the conductive film 3 coated on the inner surface of the cover glass 1. The conductive film 3 is further connected to the ground potential via the conductive film 3.
本考案を実現するために必要なカバーガラス内
面の導電膜及びアース電位と接続するための端子
は表示への静電気の影響を避けるためにもともと
蛍光表示管に備わつている。このため、特に原価
の上昇も伴わず、安価にして、高品質の駆動回路
内蔵形蛍光表示管が提供される。 The conductive film on the inner surface of the cover glass and the terminal for connection to the ground potential, which are necessary to realize the present invention, are originally provided in the fluorescent display tube in order to avoid the influence of static electricity on the display. Therefore, a high-quality fluorescent display tube with a built-in drive circuit can be provided at low cost without any increase in cost.
以上説明したように、本考案は、カバーガラス
内面に遮蔽板を取付けることにより、駆動回路を
電極フレームのアース部の近くに取るというよう
な構造上の制限がなくなるため、スペース・フア
クタが向上して、より小型化がはかれ、またアー
スが取れないというような欠点がなくなるため、
信頼性も向上するという効果がある。尚、第１
図、第２図において、カソード６は、遮蔽板２の
後方に離間して存在し、両者は接していない。
As explained above, the present invention improves the space factor by attaching a shielding plate to the inner surface of the cover glass, which eliminates structural restrictions such as placing the drive circuit near the grounding part of the electrode frame. As a result, it can be made more compact, and the drawbacks such as not being able to connect to the ground are eliminated.
This also has the effect of improving reliability. Furthermore, the first
In the figures and FIG. 2, the cathode 6 is located at a distance behind the shielding plate 2, and the two are not in contact with each other.
第１図は本考案の第１の実施例の蛍光表示管の
一部分を示す断面図、第２図は本考案の第２の実
施例の蛍光表示管の一部分を示す断面図、第３
図、第４図はいずれも従来の蛍光表示管を示す断
面図である。
１……カバーガラス、２……遮蔽板、３……導
電膜、４……端子、５……電極フレーム、６……
カソード、７……駆動回路、８……プラス電源、
９……抵抗。
FIG. 1 is a cross-sectional view showing a portion of a fluorescent display tube according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing a portion of a fluorescent display tube according to a second embodiment of the present invention, and FIG.
Both FIG. 4 and FIG. 4 are cross-sectional views showing conventional fluorescent display tubes. DESCRIPTION OF SYMBOLS 1... Cover glass, 2... Shielding plate, 3... Conductive film, 4... Terminal, 5... Electrode frame, 6...
Cathode, 7...drive circuit, 8...plus power supply,
9...Resistance.
Claims (1)
ドより放射される電子から、前記駆動回路を遮蔽
する遮蔽板を設けた蛍光表示管において、前記カ
バーガラスの内面に導電膜が形成され、前記遮蔽
板が前記導電膜に電気的及び機械的に接続されて
いることを特徴とする蛍光表示管。 In a fluorescent display tube in which a driving circuit is provided inside a cover glass and a shielding plate is provided to shield the driving circuit from electrons emitted from a cathode, a conductive film is formed on the inner surface of the cover glass, and the shielding plate is A fluorescent display tube, characterized in that it is electrically and mechanically connected to the conductive film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9259187U JPH0545010Y2 (en) | 1987-06-15 | 1987-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9259187U JPH0545010Y2 (en) | 1987-06-15 | 1987-06-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63202056U JPS63202056U (en) | 1988-12-27 |
| JPH0545010Y2 true JPH0545010Y2 (en) | 1993-11-16 |
Family
ID=30954427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9259187U Expired - Lifetime JPH0545010Y2 (en) | 1987-06-15 | 1987-06-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0545010Y2 (en) |
-
1987
- 1987-06-15 JP JP9259187U patent/JPH0545010Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63202056U (en) | 1988-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100796089B1 (en) | Display device | |
| JPH0545010Y2 (en) | ||
| US5357166A (en) | Cathode-ray tube having alternating electric field reduction device | |
| JPS6330734B2 (en) | ||
| CA2099646A1 (en) | Cathode-Ray Tube Having Internal Magnetic Shield with Strengthening Ribs | |
| US6456000B1 (en) | Cathode ray tube with ITO layer and conductive ground strip | |
| KR950014601B1 (en) | Crt device | |
| JPS5847641Y2 (en) | cathode ray tube | |
| JPS6240138A (en) | cathode ray tube | |
| KR950002659Y1 (en) | Crt | |
| JP2597553Y2 (en) | Antistatic cathode ray tube | |
| JPH0494043A (en) | Plate type image display device | |
| JP2582086Y2 (en) | Shield structure of CRT display device | |
| KR920005883Y1 (en) | Fluorescent display | |
| JPH041984B2 (en) | ||
| JP2546487B2 (en) | Color cathode ray tube | |
| US3352970A (en) | Cathode ray tubes and apparatus using the same | |
| JP2574331Y2 (en) | In-line type color CRT | |
| JPS599463U (en) | Image tube | |
| JPH06208834A (en) | Reflection type flat cathode-ray tube | |
| JP2002289122A (en) | Cathode-ray tube | |
| JPH1092345A (en) | Cathode-ray tube | |
| JPH0275137A (en) | Cathode-ray tube | |
| JPH0626144U (en) | Cathode ray tube | |
| JPH07220653A (en) | Cathode ray tube with deflection yoke |