JPS622431A - Image display device - Google Patents
Image display deviceInfo
- Publication number
- JPS622431A JPS622431A JP13941685A JP13941685A JPS622431A JP S622431 A JPS622431 A JP S622431A JP 13941685 A JP13941685 A JP 13941685A JP 13941685 A JP13941685 A JP 13941685A JP S622431 A JPS622431 A JP S622431A
- Authority
- JP
- Japan
- Prior art keywords
- cathode ray
- cathode
- display device
- rays
- image display
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube
-
- 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
- H01J31/123—Flat display tubes
- H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
- H01J31/126—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using line sources
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は熱電子放出を利用した画像表示装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to an image display device using thermionic emission.
従来の技術
従来、カラーテレビジョン画像表示用の表示素子として
はブラウン管が主として用いられているが、従来のブラ
ウン管では画面に比して奥行きが非常に長く、薄形のテ
レビジョン受像機を製作することは不可能であった。Conventional technology Traditionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes have a much longer depth than the screen, making it difficult to manufacture thin television receivers. That was impossible.
又、平板状の表示素子として最近EL表示素子、プラズ
マ表示素子、液晶表示素子等が開発されているが、いず
れも輝度、コントラスト、カラー表示の色再現性等の性
能の面で不充分であシ、実用化には時間が必要である。In addition, although EL display elements, plasma display elements, liquid crystal display elements, etc. have recently been developed as flat display elements, all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display. However, it will take time to put it into practical use.
そこで、電子ビームを用いてカラーテレビジョン画像を
平板状の表示装置によシ表示することのできる装置を達
成することを目的とし、スクリーン上の画面を垂直方向
に複数の区分に分割してそれぞれの区分毎に電子ビーム
を垂直方向に偏向して複数のラインを表示し、さらに、
水平方向に複数の区分に分割して各区分毎にR,G−B
等の螢光体を順次発光させるようにし、そのR−G−B
等の螢光体への電子ビームの照射量をカラー映像信号に
よシ制御するようにして、全体としてテレビジョン画像
表示素子とするものがある0以下図面を参照しながら、
上述した従来の画像表示装置の一例について説明する0
従来の技術としては、特公昭57−33663号公報に
示されているが、ここでは第4図、第6図に従来の画像
表示装置と、その画像表示装置の陰極線駆動パルス周波
数と陰極線固有振動数の関係を示す。第4図において、
1は電子ビーム源としての陰極線、2はその陰極線両端
部を支持、固定する支持台、3はメツシュ状の制御電極
、4は螢光体、5は背面電極、ea、ebは容器、7は
陰極線に負荷をあたえて架張するバネ、第3図において
8は陰極線駆動パルス周波数、aa、sbは陰極線駆動
パルス周波数の高調波、9aは陰極線固有振動数の最小
値、9bは陰極線固有振動数の最大値である。Therefore, we aimed to achieve a device that can display color television images on a flat display device using electron beams, and we divided the screen vertically into multiple sections. The electron beam is vertically deflected for each section to display multiple lines, and
Divide into multiple sections horizontally and print R, G-B for each section.
The R-G-B
With reference to the drawings below, there is a device in which the amount of electron beam irradiation on a phosphor such as the like is controlled by a color video signal, and the entire device is used as a television image display device.
An example of the conventional image display device mentioned above will be explained below.
The conventional technology is shown in Japanese Patent Publication No. 57-33663, but here, FIGS. 4 and 6 show a conventional image display device, the cathode ray drive pulse frequency and cathode ray natural vibration of the image display device. Showing relationships between numbers. In Figure 4,
1 is a cathode ray as an electron beam source, 2 is a support for supporting and fixing both ends of the cathode ray, 3 is a mesh-like control electrode, 4 is a phosphor, 5 is a back electrode, ea and eb are containers, and 7 is a A spring that applies a load to the cathode ray and stretches it; in Fig. 3, 8 is the cathode ray driving pulse frequency, aa and sb are harmonics of the cathode ray driving pulse frequency, 9a is the minimum value of the cathode ray natural frequency, and 9b is the cathode ray natural frequency is the maximum value of
以上のように構成された画像表示装置について、以下そ
の動作を説明する。The operation of the image display device configured as described above will be described below.
まず、電子ビーム源としての陰極線1は水平方向に線状
に分布する電子ビームを発生するように、水平方向に支
持台2に取シ付けられた板バネ7にて架張されておシ、
かかる陰極線1が適宜間隔を介して垂直方向に複数本設
けられている。これらの陰極線1はたとえば10〜20
#mφのタングステン線の表面に酸化物陰極材料が塗着
されて構成されている。そして、順に一姶時間づつ電子
ビームを放出するように、陰極線駆動パルス周波数8に
て制御され、なおかつ前記一定時間以外の時間に熱電子
を発生する温度に上昇させるためにヒート電流が流され
る。陰極線固有振動数はバネ7の負荷荷重、ヒート電流
等によp9a、9bに応がっている。背面電極6は、一
定時間電子ビームを放出すべく制御される陰極線1以外
の他の陰極線1からの電子ビームの発生を抑止し、かつ
、発生された電子ビームを前方向だけに向けて押し出す
作用をするQこの背面電極5は容器6の後壁の内側に附
着された導電材料の塗膜によって形成されていてもよい
。また、これら背面電極6と陰極線1との代わりに、メ
ツシュ状の制御電極3は陰極線・1のそれぞれと対向す
る水平方向に長いスリット(図示せず)を有する導電対
であり、陰極線1から放出された電子ビームをそのスリ
ットを通して通過させると同時に垂直または水平方向に
偏向させる。又スリットのかわシに丸穴あるいは誠リッ
ト、丸穴を伴用してもよい。螢光体4は水平方向に正分
された各一本の電子ビームに対して、R・G−Bの3色
の螢晃体が1対ずつ設けられており、垂直方向にストラ
イプ状に塗布されている。そして上記の構成部品を分割
した容器6a、6b内に挿入後、接着7す゛ットを介し
て封着し内部の真空を保っている。First, a cathode ray 1 as an electron beam source is stretched horizontally by a plate spring 7 attached to a support base 2 so as to generate an electron beam distributed linearly in the horizontal direction.
A plurality of such cathode rays 1 are provided in the vertical direction at appropriate intervals. These cathode rays 1 are, for example, 10 to 20
An oxide cathode material is coated on the surface of a #mφ tungsten wire. Then, it is controlled at a cathode ray driving pulse frequency of 8 to sequentially emit an electron beam one hour at a time, and a heat current is applied to raise the temperature to generate thermoelectrons at times other than the fixed time. The cathode ray natural frequency corresponds to p9a and 9b depending on the load on the spring 7, heat current, etc. The back electrode 6 has the function of suppressing the generation of electron beams from cathode rays 1 other than the cathode rays 1 that are controlled to emit electron beams for a certain period of time, and pushing out the generated electron beams only in the forward direction. The back electrode 5 may be formed by a coating of conductive material applied to the inside of the rear wall of the container 6. In addition, instead of the back electrode 6 and the cathode ray 1, the mesh-like control electrode 3 is a conductive pair having a horizontally long slit (not shown) facing each of the cathode rays 1, and emits light from the cathode ray 1. The electron beam is passed through the slit and simultaneously deflected vertically or horizontally. Also, a round hole, a slit, or a round hole may be used in addition to the slit. The phosphor 4 is provided with a pair of phosphors in each of the three colors R, G-B for each electron beam that is divided into horizontal directions, and is coated in stripes in the vertical direction. has been done. After the above-mentioned components are inserted into the divided containers 6a and 6b, they are sealed together with adhesive 7 to maintain the internal vacuum.
発明が解決しようとする問題点
しかしながら上記のような構成では、前記陰極線1は螢
光体4の大きさが大きくなるにつれてそれに伴って長く
なシ、振動し易くなる。例えば、陰極線1の支持台2の
支持部間の距離が10011II!にもなると、直径2
0〜30μmの陰極線1は、陰極線駆動パルス周波数8
の高調波8&あるいは8bと陰極線固有振動数との洪振
が発生すると、陰極線1は±20〜20011m程度の
振幅が長時間にわたって発生する。この陰極線1が振動
すると、制御電極3との相対位置が変化し、画像がゆれ
るとか、輝度むうを生じ画像上の欠点となっていfC。Problems to be Solved by the Invention However, in the above configuration, as the size of the phosphor 4 increases, the cathode ray 1 becomes longer and becomes more likely to vibrate. For example, the distance between the support parts of the support base 2 of the cathode ray 1 is 10011II! becomes diameter 2
The cathode ray 1 of 0 to 30 μm has a cathode ray drive pulse frequency of 8
When the harmonics 8 & or 8b of the cathode ray 8b and the natural frequency of the cathode ray occur, an amplitude of about ±20 to 20011 m is generated in the cathode ray 1 for a long time. When the cathode ray 1 vibrates, its relative position with respect to the control electrode 3 changes, causing image fluctuations and brightness fluctuations, resulting in image defects fC.
本発明は上記問題に鑑み、カソードが振動することなく
、安定した画像が得られると共に、輝度ム2もなく、高
品質で信頼性が高い画像表示装置を提供するものである
。The present invention has been made in view of the above-mentioned problems, and provides an image display device that can provide stable images without vibration of the cathode, has no brightness irregularities, and is of high quality and highly reliable.
問題点を解決するための手段
上記問題点を解決するために本発明の画像表示装置は、
陰極線駆動パルス周波数と陰極線固有振動数が共振ゾー
ン外の範囲に陰極線固有振動数がなるようにすべての陰
極線を架張するものである。Means for Solving the Problems In order to solve the above problems, the image display device of the present invention includes:
All the cathode rays are strung so that the cathode ray driving pulse frequency and the cathode ray natural frequency fall outside the resonance zone.
作 用
本発明は上記した構成によって、陰極線が振動するエネ
ルギーを受けることなく、陰極線駆動パルス周波数と陰
極線固有振動数との共振が無くなシ、陰極線の振動発生
がなく、結果として画像のゆれ、輝度ムラが発生しなく
なる。According to the above-described configuration, the present invention eliminates the vibration energy of the cathode rays, eliminates resonance between the cathode ray drive pulse frequency and the natural frequency of the cathode rays, and eliminates the generation of vibrations of the cathode rays.As a result, the image shakes, Luminance unevenness will no longer occur.
実施例
以下本発明の一実施例の画像表示装置について、図面を
参照しながら説明する0
第1図、第2図は本発明の一実施例における画像表示装
置の陰極線駆動パルス周波数と陰極線固有振動数の関係
と画像表示装置を示すものである0第1図において、1
8は陰極線駆動パルス周波数、1sa、1sbは前記陰
極線駆動パルス周波数の高調波、19aは陰極線固有振
動数の最小値、19bは陰極線固有振動数の最大値であ
る。また第2図において、11はバリウム酸化物等の熱
電子放出機能を有する物質を塗布した導電性のある陰極
線、12はこの陰極線の両端子を支持、固定する支持台
、13は前記陰極線11から放出されたビームを所定の
画像になるように制御する電極、14は前記制御電極1
3を通ったビームがぶつかって発光し画像を表示する螢
光体、16は陰極線11から熱電子が発生し易いように
設置された背面電極、16&、16bは容器、17は陰
極線に負荷をあたえて架張するバネである。EXAMPLE Below, an image display device according to an embodiment of the present invention will be explained with reference to the drawings.0 Figures 1 and 2 show the cathode ray driving pulse frequency and cathode ray natural vibration of an image display device according to an embodiment of the present invention. In Figure 1, which shows the relationship between numbers and the image display device, 1
8 is the cathode ray driving pulse frequency, 1sa and 1sb are harmonics of the cathode ray driving pulse frequency, 19a is the minimum value of the cathode ray natural frequency, and 19b is the maximum value of the cathode ray natural frequency. Further, in FIG. 2, 11 is a conductive cathode wire coated with a substance having thermionic emission function such as barium oxide, 12 is a support base for supporting and fixing both terminals of this cathode wire, and 13 is a wire from the cathode wire 11. An electrode for controlling the emitted beam to form a predetermined image; 14 is the control electrode 1;
16 is a back electrode installed to facilitate the generation of thermoelectrons from the cathode rays 11, 16&, 16b is a container, and 17 is a material that applies a load to the cathode rays. It is a spring that is stretched.
以上のように構成された画像表示装置について以下第1
図及び第2図、第3図を用いてその動作を説明する。The following is a first explanation of the image display device configured as described above.
The operation will be explained using FIGS. 2 and 3.
陰極線11にパルス状の電圧を負荷し、熱電子を放出さ
せると、熱電子を放出するごく微小時間に陰極線11に
は電流が流れる0そして、この電流と陰極線11の抵抗
の2束と微小時間の積からなる発熱量に相当する分だけ
陰極線11の温度が上昇し、陰極線11は熱膨張する。When a pulsed voltage is applied to the cathode ray 11 to cause it to emit thermionic electrons, a current flows through the cathode ray 11 during the very minute time when the thermionic electrons are emitted. The temperature of the cathode ray 11 increases by an amount corresponding to the amount of heat generated by the product of , and the cathode ray 11 thermally expands.
陰極線11が膨張すると、支持台12の支持部間に3C
1〜45tの張力で架張されている張力が変化し、結果
として陰極線11の陰極線固有振動数19が変化する。When the cathode ray 11 expands, 3C is generated between the support parts of the support base 12.
The tension in the tension of 1 to 45 t changes, and as a result, the cathode ray natural frequency 19 of the cathode ray 11 changes.
この陰極線固有振動数19が陰極線駆動パルス周波数1
8あるいは、陰極線駆動パルス周波数の高調波18a、
18bと略一致すると、共振を生じ第2図の従来例の場
合は、第3図の20に示す様に著しい振動を生じる陰極
線1が発生し、陰極線1に減衰効果がなく又高真空中に
あるために空気による減衰効果もないために大きな振幅
をもった振動が長時間に渡って続く。これに対し本発明
による構成においては、陰極線固有振動数19を陰極線
駆動パルス周波数18あるいは、その高調波18a、1
8bとの共振ゾーンよシ外しているために共振すること
はない。本実施例では使用時の陰極線固有振動数の最小
値19aは、陰極線駆動パルス周波数18a +5 H
z 、同じく最大値19bは18b−5Hzの範囲に入
る様すべての陰極線11を架張すると第3図の20の条
件すなわち共振を発生するゾーンよシずれているために
、陰極線11は陰極線固有振動数19と陰極線駆動パル
ス周波数18あるいは陰極線駆動パルス周波数の高調波
1ea、1sbとの共振が起らない、すなわち、第3図
に示す21の様に10μ以下にすることができた。こう
して、画像のゆれ、輝度ムラがなくなシ、又、陰極線1
1に大きな振動エネルギーがかからないため、信頼性が
向上し高品質の画像が得られた。This cathode ray natural frequency 19 is the cathode ray driving pulse frequency 1
8 or a harmonic of the cathode ray driving pulse frequency 18a,
18b, resonance occurs, and in the case of the conventional example shown in FIG. 2, the cathode ray 1 generates significant vibration as shown at 20 in FIG. Because of this, there is no damping effect due to air, so vibrations with large amplitudes continue for a long time. In contrast, in the configuration according to the present invention, the cathode ray natural frequency 19 is changed to the cathode ray drive pulse frequency 18 or its harmonics 18a, 1
Since it is outside the resonance zone with 8b, it will not resonate. In this example, the minimum value 19a of the cathode ray natural frequency during use is the cathode ray driving pulse frequency 18a + 5 H
z, if all the cathode rays 11 are stretched so that the maximum value 19b falls within the range of 18b - 5Hz, the cathode rays 11 are shifted from the condition of 20 in Fig. 3, that is, the zone where resonance occurs, so the cathode rays 11 have a cathode ray natural vibration. No resonance occurs between Equation 19 and the cathode ray driving pulse frequency 18 or the harmonics 1ea and 1sb of the cathode ray driving pulse frequency, that is, it was possible to reduce the resonance to 10 μ or less as shown in 21 shown in FIG. In this way, image shake and brightness unevenness are eliminated, and the cathode ray 1
Since no large vibrational energy is applied to 1, reliability is improved and high-quality images can be obtained.
発明の効果
以上のように本発明は、使用時の陰極線固有振動数が陰
極線駆動パルス周波数あるいはその高調波と共振しない
ゾーンに架張することによシ、陰極線の長さに関係なく
、陰極線が大きな振幅を持って振動することはなく、画
像のゆれ、輝度ム2のない高品質の画像を得ることがで
き、その実用的効果は大なるものである。Effects of the Invention As described above, the present invention provides a structure in which the cathode rays are stretched in a zone where the natural frequency during use does not resonate with the cathode ray driving pulse frequency or its harmonics. It does not vibrate with a large amplitude, and it is possible to obtain a high quality image without image shaking or brightness unevenness, and its practical effects are great.
第1図は本発明の一実施例における陰極線駆動パンレス
周波数と陰極線固有振動数の関係図、第2図は本発明に
よる画像表示装置の一実施例における一部破断斜視図、
第3図は陰極線の共振による振幅の変化を示す図、第4
図は従来例の画像表示装置の一部破断斜視図、第6図は
従来例の陰極線駆動パルス周波数と陰極線固有振動数の
関係図である。
11・・−・・・陰極線、12・・・・−・支持台、1
3・・・−・・制御電極、14・・・・・・螢光体、1
5・・・・・・背面電極、1ea、1ab・・・・・・
容器、17・・・・・・バネ、18・・−・・−陰極線
駆動パルス周波数、18a、18b・・・−・・陰極線
駆動パルス周波数の高調波、1s a 、 19b・・
・・・・陰極線固有振動数の最小値、最大値。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名1
1 図7y−−−陰極潜鴇シ籾パ・しス周浪炊l畝t
qb−−〜陰極保同旬徴1功最1硫ゑN晃(Hz)
第3rl!J
Hz。FIG. 1 is a diagram showing the relationship between the cathode ray driving panless frequency and the cathode ray natural frequency in an embodiment of the present invention, and FIG. 2 is a partially cutaway perspective view of an embodiment of the image display device according to the present invention.
Figure 3 is a diagram showing changes in amplitude due to resonance of cathode rays, Figure 4
The figure is a partially cutaway perspective view of a conventional image display device, and FIG. 6 is a diagram showing the relationship between cathode ray driving pulse frequency and cathode ray natural frequency in the conventional example. 11... Cathode ray, 12... Support stand, 1
3... Control electrode, 14... Fluorescent material, 1
5...Back electrode, 1ea, 1ab...
Container, 17... Spring, 18...- Cathode ray drive pulse frequency, 18a, 18b... Harmonic of cathode ray drive pulse frequency, 1s a, 19b...
... Minimum and maximum values of cathode ray natural frequency. Name of agent: Patent attorney Toshio Nakao and 1 other person1
1 Fig. 7y---Cathode latent paddy rice pa/shisu round cooking l ridge
qb--~Kyogoku Hodoshuncho 1 gong 1st suuue N Akira (Hz) 3rd rl! J Hz.
Claims (1)
熱電子の流れを制御する制御電極と、前記熱電子を受け
て発光可能な螢光体と、前記熱電子を前記陰極線から容
易に放出させる様に設けられたバック電極とを備え、前
記陰極線の駆動パルス周波数と前記陰極線の固有振動数
との共振ゾーン外の範囲に前記陰極線の固有振動数を合
せるようにした画像表示装置。A cathode ray that emits thermionic electrons, a control electrode that controls the flow of thermionic electrons emitted from the cathode ray, a phosphor that can receive the thermoelectrons and emit light, and a phosphor that can easily emit the thermoelectrons from the cathode rays. 1. An image display device comprising: a back electrode disposed in a similar manner, and the natural frequency of the cathode ray is adjusted to a range outside a resonance zone between the driving pulse frequency of the cathode ray and the natural frequency of the cathode ray.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13941685A JPS622431A (en) | 1985-06-26 | 1985-06-26 | Image display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13941685A JPS622431A (en) | 1985-06-26 | 1985-06-26 | Image display device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS622431A true JPS622431A (en) | 1987-01-08 |
Family
ID=15244716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13941685A Pending JPS622431A (en) | 1985-06-26 | 1985-06-26 | Image display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS622431A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981981A (en) * | 1982-11-01 | 1984-05-11 | Matsushita Electric Ind Co Ltd | Picture display device |
-
1985
- 1985-06-26 JP JP13941685A patent/JPS622431A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981981A (en) * | 1982-11-01 | 1984-05-11 | Matsushita Electric Ind Co Ltd | Picture display device |
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