JPS6238915B2 - - Google Patents
Info
- Publication number
- JPS6238915B2 JPS6238915B2 JP7785579A JP7785579A JPS6238915B2 JP S6238915 B2 JPS6238915 B2 JP S6238915B2 JP 7785579 A JP7785579 A JP 7785579A JP 7785579 A JP7785579 A JP 7785579A JP S6238915 B2 JPS6238915 B2 JP S6238915B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode ray
- ray tube
- color cathode
- predetermined
- beam scanning
- 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
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 26
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 description 6
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 206010047571 Visual impairment Diseases 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/16—Picture reproducers using cathode ray tubes
- H04N9/18—Picture reproducers using cathode ray tubes using separate electron beams for the primary colour signals
- H04N9/20—Picture reproducers using cathode ray tubes using separate electron beams for the primary colour signals with more than one beam in a tube
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Details Of Television Scanning (AREA)
Description
【発明の詳細な説明】
本発明はカラーテレビジヨン受像機に適用して
好適なカラー陰極線管を有する表示装置に関し、
カラー陰極線管の解像度の向上を図らんとするも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device having a color cathode ray tube suitable for application to a color television receiver.
The aim is to improve the resolution of color cathode ray tubes.
先ず第１図及び第２図を参照して、カラー陰極
線管の解像度について検討する。第１図はカラー
陰極線管としてのトリニトロン（登録商標）の一
部を示し、PHは螢光体層で、順次に繰返し配列
された赤、緑及び青の螢光体ストライプＲ，Ｇ，
Ｂから成つている。MSはアパーチヤグリルと称
されるマスクで、螢光体ストライプＲ，Ｇ，Ｂの
延在方向と平行なスリツトSLを有し、このスリ
ツトSLは例えば各線の螢光体ストライプＧに対
向して設けられている。そして、電子銃（図示せ
ず）よりの赤、緑及び青の電子ビームがコンバー
ジエンス電極（図示せず）によつてマスクMS上
に集束せしめられ、そのスリツトSLを通過した
赤、緑及び青の電子ビームＢR，ＢG，ＢBが夫々
赤、緑及び青の螢光体ストライプＲ，Ｇ，Ｂに衝
撃して夫々の色を発光せしめるようになされてい
る。尚、ｍはビームＢR，ＢG，ＢBの走査方向
で、これは螢光体ストライプＲ，Ｇ，Ｂの延在方
向を略直交する方向である。 First, the resolution of a color cathode ray tube will be discussed with reference to FIGS. 1 and 2. Figure 1 shows a part of Trinitron (registered trademark) as a color cathode ray tube, PH is a phosphor layer, and red, green and blue phosphor stripes R, G,
It consists of B. MS is a mask called an aperture grille, and has a slit SL parallel to the extending direction of the phosphor stripes R, G, and B, and the slit SL is provided facing the phosphor stripe G of each line, for example. ing. Red, green, and blue electron beams from an electron gun (not shown) are focused onto the mask MS by a convergence electrode (not shown), and the red, green, and blue electron beams pass through the slit SL. The electron beams B R , B G , B B impact the red, green and blue phosphor stripes R, G, B, respectively, to cause them to emit the respective colors. Note that m is the scanning direction of the beams B R , B G , and B B , which is a direction substantially perpendicular to the extending direction of the phosphor stripes R, G, and B.
ところで、カラー陰極線管では、カラー映像信
号（電気信号）がビームＢR，ＢG，ＢBの電流に
変換され、そのビームＢR，ＢG，ＢBの電流が
赤、緑及び青の光からなる光信号に変換される。 By the way, in a color cathode ray tube, a color video signal (electrical signal) is converted into electric currents of beams B R , B G , B B , and the electric currents of the beams B R , B G , B B are converted into red, green, and blue light. is converted into an optical signal consisting of
この場合、電気信号は時間の経過と共に連続的
に変化するのに対し、光信号はその電気信号を所
定のサンプリング周波数でサンプリングした信号
と等価となる。即ち、マスクに照射されたビーム
のうち、マスクMSのスリツトSLを通過したもの
だけが光信号に変換され、それ以外のビームは光
信号に変換されないからである。 In this case, the electrical signal changes continuously over time, whereas the optical signal is equivalent to a signal obtained by sampling the electrical signal at a predetermined sampling frequency. That is, of the beams irradiated onto the mask, only those that pass through the slit SL of the mask MS are converted into optical signals, and the other beams are not converted into optical signals.
このサンプリング周波数Fsは、水平周波数ｆh
（＝15.75kHz）、マスク（13形トリニトロンの場
合）MSのスリツトSLの数Ｎ（＝387）、比例定数
ａ（これは水平帰線期間、ビームのオーバースキ
ヤンを考慮し定数で１より大であるが、ここでは
1.217となる）から次式の如く表わされる。 This sampling frequency Fs is the horizontal frequency f h
(=15.75kHz), mask (for Trinitron type 13), number of MS slits SL N (=387), proportionality constant a (this is a constant larger than 1 considering the horizontal retrace period and beam overscan). Yes, but here
1.217), it can be expressed as follows.
Fs＝ａ・ｆh・Ｎ＝7.42（MHz） ………(1)
カラー陰極線管の解像度を上げるにはサンプリ
ング周波数Fsを大にすればよいが、そのために
は螢光体ストライプＲ，Ｇ，Ｂの幅を小さくす
る、即ちマスクMSのスリツトSLのピツチＬを短
かくする必要があるが、それは自づから限度があ
る。 Fs = a・f h・N=7.42 (MHz) ………(1) To increase the resolution of a color cathode ray tube, the sampling frequency Fs can be increased, but in order to do so, the phosphor stripes R, G, It is necessary to reduce the width of B, that is, to shorten the pitch L of the slit SL of the mask MS, but there is a limit to this.
そこで、螢光体ストライプＲ，Ｇ，Ｂの幅及び
マスクMSのスリツトSLのピツチＬはそのまま
で、カラー陰極線管の見掛上の解像度を向上させ
ることを考える。 Therefore, it is considered to improve the apparent resolution of the color cathode ray tube while keeping the widths of the phosphor stripes R, G, and B and the pitch L of the slits SL of the mask MS unchanged.
そこで、カラー陰極線管に於て、電子銃よりの
ビームのうちマスクMSに衝撃し、螢光体層PHに
到達しないビームをも光信号に変換することを考
える。そのためには、電子銃よりのビームがマス
クMSに衝撃する場合には、マスクMSと螢光体層
PHをビーム走査に対し相対的にビーム走査方向
又はその反対方向に移動させて、電子銃よりのビ
ームがマスクMSのスリツトSLを通過するように
すれば良い。しかし、この場合画面のふらつきが
生じるから、それを視覚的に補正する必要があ
る。 Therefore, in a color cathode ray tube, we will consider converting the beam from the electron gun that impacts the mask MS and does not reach the phosphor layer PH into an optical signal. For this purpose, when the beam from the electron gun impacts the mask MS, the mask MS and the phosphor layer must be
The beam from the electron gun may be made to pass through the slit SL of the mask MS by moving the PH in the beam scanning direction or the opposite direction relative to the beam scanning. However, in this case, screen flickering occurs, so it is necessary to visually correct it.
次に第２図を参照してカラー陰極線管の解像度
を別の面から検討してみる。上述したように螢光
体層PHからの光信号はカラー映像信号（電気信
号）をサンプリング周波数Fsを以つてサンプリ
ングしたものである。従つて、周波数がｆの光信
号成分S1に対しては、周波数がf′＝Fs−ｆ、f″＝
Fs＋ｆのイメージ成分S2，S3が生じることにな
る。光信号成分S1の周波数ｆが比較的低い場合
は、そのイメージ成分S2，S3の周波数f′，f″はか
なり高くなるので目に付かず問題は無い。しか
し、光信号成分S1の周波数ｆが例えば5MHzと高
ければ、イメージ成分S2，S3の周波数f′，f″は
夫々2.42MHz、12.42MHzとなり、後者は問題な
いが、前者のイメージ成分S2はカラー陰極線管の
画面にノイズとなつて表われる。従つて、従来は
カラー陰極線管に供給するカラー映像信号の輝度
信号成分を略Fs／２＝3.71MHz以下に帯域制限
して、光信号中に比較的周波数の低いイメージ成
分が発生しないようにしている。 Next, with reference to FIG. 2, the resolution of color cathode ray tubes will be examined from another perspective. As described above, the optical signal from the phosphor layer PH is a color video signal (electrical signal) sampled at the sampling frequency Fs. Therefore, for the optical signal component S 1 with frequency f, the frequency is f′=Fs−f, f″=
Image components S 2 and S 3 of Fs+f are generated. If the frequency f of the optical signal component S 1 is relatively low, the frequencies f' and f'' of the image components S 2 and S 3 will be quite high, so they will not be noticed and there will be no problem. However, the optical signal component S 1 If the frequency f is as high as 5 MHz, the frequencies f' and f'' of the image components S 2 and S 3 will be 2.42 MHz and 12.42 MHz, respectively.The latter is not a problem, but the former image component S 2 is a color cathode ray tube. It appears as noise on the screen. Therefore, in the past, the luminance signal component of the color video signal supplied to the color cathode ray tube was band-limited to approximately Fs/2 = 3.71 MHz or less to prevent relatively low frequency image components from occurring in the optical signal. There is.
そこで、カラー陰極線管に於て、マスクMSと
螢光体層PHをビーム走査方向に対し相対的にそ
のビーム走査方向又はその反対方向に移動させ
て、人間の目の残像期間中に於てサンプリング信
号Scが位相回転してその逆相信号Sc′が生じるよ
うにすれば、イメージ信号S2，S3も同様に位相回
転して夫々の逆相信号S2′，S3′が生じ、結局見掛
上イメージ信号S2，S3は打消されたことになる。
そのようにすれば、カラー映像信号中の輝度信号
成分の帯域を５〜6MHzまで上昇させても問題が
なくなる。 Therefore, in a color cathode ray tube, the mask MS and the phosphor layer PH are moved relative to the beam scanning direction or in the opposite direction, and sampling is performed during the afterimage period of the human eye. If the phase of the signal Sc is rotated so that its opposite phase signal Sc′ is generated, the image signals S 2 and S 3 are also phase rotated in the same way and the respective opposite phase signals S 2 ′ and S 3 ′ are generated, and eventually, Apparently, the image signals S 2 and S 3 have been canceled.
If this is done, there will be no problem even if the band of the luminance signal component in the color video signal is increased to 5 to 6 MHz.
人間の目の残像時間はカラー陰極線管の画面の
明るさ、画素の大きさにも依存するが約30ｍsec
程度である。そこで、例えば１垂直期間（＝１／６０
sec）又は２垂直期間（＝１／３０sec）中にビームの走
査に対し相対的にマスクMS及び螢光体層PHをマ
スクMSのスリツトSLのピツチＬ（例えば13形ト
リニトロンの場合0.6327mm）の略１／２、即ち略１／２
Ｌ＝
0.3163mm移動させれば良いことが解る。その移動
量は0.2〜0.4mmの範囲内又はその整数倍であれば
十分であるが、その整数の値はあまり大きくする
と実用的ではない。 The afterimage time for the human eye is approximately 30 msec, although it depends on the brightness of the color cathode ray tube screen and the size of the pixels.
That's about it. Therefore, for example, during one vertical period (=1/60 sec) or two vertical periods (=1/30 sec), the mask MS and the phosphor layer PH are adjusted to the pitch L of the slit SL of the mask MS relative to the scanning of the beam. (For example, 0.6327 mm in the case of 13 type Trinitron), that is, approximately 1/2
It turns out that it is good to move L = 0.3163mm. It is sufficient that the amount of movement is within the range of 0.2 to 0.4 mm or an integral multiple thereof, but it is not practical if the integer value is too large.
本発明によるカラー陰極線管を有する表示装置
は、カラー陰極線管の螢光体層及びマスクに対し
ビーム走査を行なう主偏向手段と、その主偏向手
段のビームによるビーム走査面が所定の方向に所
定の周波数及び所定の振幅を以つて往復移動され
るようにビームの補助偏向を行なう補助偏向手段
と、カラー陰極線管の螢光体から外部に放射され
る光信号をビーム走査面の往復移動に同期させて
所定の周波数及び所定の振幅を以つて往復移動さ
せて、ビーム走査面の往復移動による画面の揺動
の視覚的補正を行なう揺動補正手段とを備え、カ
ラー陰極線管の画面の視覚的残像時間内に、螢光
体層よりの光信号イメージ成分の打消を行なう逆
相イメージ成分を発生させるように、補助偏向手
段並びに揺動補正手段による往復移動の各々につ
いて、所定の方向、所定の周波数及び所定の振幅
の選定を行なつたものである。 A display device having a color cathode ray tube according to the present invention includes a main deflection means for scanning a beam with respect to a phosphor layer and a mask of the color cathode ray tube, and a beam scanning surface of the main deflection means with a beam in a predetermined direction. Auxiliary deflection means for performing auxiliary deflection of the beam so that the beam is reciprocated with a frequency and a predetermined amplitude, and an optical signal emitted to the outside from the phosphor of the color cathode ray tube is synchronized with the reciprocating movement of the beam scanning surface. vibration correction means for visually correcting the fluctuation of the screen due to the reciprocating movement of the beam scanning surface by reciprocating the beam at a predetermined frequency and with a predetermined amplitude, and the device comprises: Each reciprocating movement by the auxiliary deflection means and the wobble correction means is performed in a predetermined direction and at a predetermined frequency so as to generate an opposite-phase image component that cancels the optical signal image component from the phosphor layer within a certain period of time. and a predetermined amplitude is selected.
以下に第３図を参照して、本発明の第１の実施
例を説明する。第３図に於て、１はカラー陰極線
管、この場合第１図について説明したトリニトロ
ンで、紙面の表から裏への方向が垂直方向であ
る。２はその偏向ヨーク、３はそのうちの水平偏
向コイル、４は水平偏向回路である。５は三角波
発振器で、これよりの三角波信号を水平偏向回路
４の水平発振回路に周波数制御信号としてAFC
信号と共に供給する。これら水平偏向コイル３、
水平偏向回路４及び三角波発振器５にて、カラー
陰極線管の螢光体層PH及びマスクMSに対しビー
ム走査面が略水平方向に往復移動する如く３本の
ビームを補助偏向する補助偏向手段を構成してい
る。尚、水平偏向コイル３とは別個の補助偏向コ
イルあるいは補助偏向電極を設け、これに三角波
発振器５の出力を提供するようにして補助偏向手
段６を構成しても良い。 A first embodiment of the present invention will be described below with reference to FIG. In FIG. 3, reference numeral 1 denotes a color cathode ray tube, in this case the trinitron described in connection with FIG. 1, and the direction from the front to the back of the paper is perpendicular. 2 is its deflection yoke, 3 is a horizontal deflection coil, and 4 is a horizontal deflection circuit. 5 is a triangular wave oscillator, and the triangular wave signal from this is sent to the horizontal oscillation circuit of the horizontal deflection circuit 4 as a frequency control signal for AFC.
Supplied with the signal. These horizontal deflection coils 3,
The horizontal deflection circuit 4 and the triangular wave oscillator 5 constitute an auxiliary deflection means for auxiliary deflection of the three beams so that the beam scanning plane reciprocates in a substantially horizontal direction with respect to the phosphor layer PH and mask MS of the color cathode ray tube. are doing. The auxiliary deflection means 6 may be configured by providing an auxiliary deflection coil or an auxiliary deflection electrode separate from the horizontal deflection coil 3 and supplying the output of the triangular wave oscillator 5 to this.
そして、三角波発振器５の発振周波数を例えば
２Hzに選び、その振幅を、螢光体層PHに対しビ
ームの走査面が水平方向に於て左右に±3.75L
（＝±1.186mm）の範囲で振れるように選ぶ。この
ためカラー陰極線管１の画面は水平方向にｄ＝
7.5Lの範囲で揺動することになる。 Then, the oscillation frequency of the triangular wave oscillator 5 is selected to be, for example, 2 Hz, and the amplitude is set to ±3.75L left and right in the horizontal direction of the beam scanning surface with respect to the phosphor layer PH.
(=±1.186mm). Therefore, the screen of the color cathode ray tube 1 is horizontally d=
It will oscillate within a range of 7.5L.
そこで、カラー陰極線管１の管面、即ち螢光体
層PHに対し水平方向に於て45゜の角度をなすよ
うに鏡、例えば平面鏡７を配する。この平面鏡７
をスピーカ８の振動板に取付け、三角波発振器５
よりの三角波信号をスピーカ８に供給して、平面
鏡７を７′の如く平行に振動させる。そして、平
面鏡７に対し45゜の角度の方向からカラー陰極線
管１の画面の反射線を見たとき、画面の揺動が視
覚的に補正されるようにする。かくして、三角波
発振器５、鏡７、スピーカ８にて、螢光体層PH
に対するビーム走査面の往復移動による画面の揺
動を視覚的に補正する揺動補正手段９を構成す
る。 Therefore, a mirror, for example, a plane mirror 7, is arranged so as to form an angle of 45° in the horizontal direction with respect to the tube surface of the color cathode ray tube 1, that is, the phosphor layer PH. This plane mirror 7
is attached to the diaphragm of the speaker 8, and the triangular wave oscillator 5
A triangular wave signal is supplied to the speaker 8 to vibrate the plane mirror 7 in parallel as indicated by 7'. When the reflected line of the screen of the color cathode ray tube 1 is viewed from a direction at an angle of 45 degrees with respect to the plane mirror 7, the shaking of the screen is visually corrected. Thus, at the triangular wave oscillator 5, the mirror 7, and the speaker 8, the phosphor layer PH
A swing correction means 9 is configured to visually correct the swing of the screen due to the reciprocating movement of the beam scanning surface.
次に第４図を参照して、本発明の他の実施例を
説明するも、第３図と対応する部分には同一符号
を付して説明する。補助偏向手段６は第３図と同
様であるが、揺動補正手段９が異なる。この実施
例では画面の揺動を、カラー陰極線管１自体を揺
動させて打消すものである。即ち、カラー陰極線
管１を台１０に取付け固定し、その台を軸１１を
中心として回動自在となす。そしてクランク機構
１２を台１０に取付け、このクランク機構１２を
モータ１３にて駆動するようにする。モータ１３
はモータ制御回路１４にて駆動される。そして、
三角波発振器５よりの三角波信号が水平偏向回路
４の水平発振器とモータ制御回路１４とに供給さ
れる。又、ポテンシヨメータ１５及び直流電源１
６より成る位置検出回路１７が台１０に設けら
れ、これにより台１０、即ちカラー陰極線管１の
揺動位置が検出され、この位置検出信号が水平偏
向回路４の水平発振器及びモータ制御回路１４に
供給されて、ビームの補助偏向とカラー陰極線管
１の揺動との同期が採られる。 Next, another embodiment of the present invention will be described with reference to FIG. 4, in which parts corresponding to those in FIG. 3 are given the same reference numerals. The auxiliary deflection means 6 is the same as that shown in FIG. 3, but the swing correction means 9 is different. In this embodiment, the shaking of the screen is canceled out by shaking the color cathode ray tube 1 itself. That is, the color cathode ray tube 1 is attached and fixed to a stand 10, and the stand is rotatable about a shaft 11. Then, a crank mechanism 12 is attached to the stand 10, and the crank mechanism 12 is driven by a motor 13. Motor 13
is driven by the motor control circuit 14. and,
A triangular wave signal from the triangular wave oscillator 5 is supplied to the horizontal oscillator of the horizontal deflection circuit 4 and the motor control circuit 14 . Also, potentiometer 15 and DC power supply 1
A position detection circuit 17 consisting of 6 is provided on the stand 10, and this detects the swinging position of the stand 10, that is, the color cathode ray tube 1, and this position detection signal is sent to the horizontal oscillator and motor control circuit 14 of the horizontal deflection circuit 4. The auxiliary deflection of the beam and the oscillation of the color cathode ray tube 1 are synchronized.
尚、カラー陰極線管としては、３本のビーム、
マスク（シヤドウマスク）の孔、螢光体層の３色
の螢光体ドツトが夫々正三角形の頂点となる配置
関係のものでも良く、その場合の螢光体層に対す
るビーム走査面の移動方向は水平、垂直、その他
の方向のいずれでも良い。上述の実施例の場合で
も、垂直を除く方向ならいずれでもよい。 In addition, as a color cathode ray tube, there are three beams,
The holes in the mask (shadow mask) and the phosphor dots of the three colors in the phosphor layer may be located at the vertices of an equilateral triangle, and in this case, the direction of movement of the beam scanning plane relative to the phosphor layer is horizontal. , vertically, or in any other direction. Even in the case of the above embodiment, any direction other than vertical may be used.
上述せる本発明カラー陰極線管を有する表示装
置によれば、カラー映像信号の輝度信号成分の帯
域の上限を向上せしめ得るので、カラー陰極線管
の解像度を向上させることができる。 According to the above-described display device having the color cathode ray tube of the present invention, the upper limit of the band of the luminance signal component of the color video signal can be improved, so that the resolution of the color cathode ray tube can be improved.
第１図は本発明の説明に供するカラー陰極線管
の一部の説明図、第２図は周波数スペクトル図、
第３図及び第４図は本発明の第１及び第２の実施
例を示すブロツク線図である。
１はカラー陰極線管、PHは螢光体層、MSはマ
スク、６は補助偏向手段、９は揺動補正手段であ
る。
FIG. 1 is an explanatory diagram of a part of a color cathode ray tube used for explaining the present invention, FIG. 2 is a frequency spectrum diagram,
FIGS. 3 and 4 are block diagrams showing first and second embodiments of the present invention. 1 is a color cathode ray tube, PH is a phosphor layer, MS is a mask, 6 is an auxiliary deflection means, and 9 is a fluctuation correction means.
Claims (1)
ビーム走査を行なう主偏向手段と、該主偏向手段
のビームによるビーム走査面が所定の方向に所定
の周波数及び所定の振幅を以つて往復移動される
ようにビームの補助偏向を行なう補助偏向手段
と、上記カラー陰極線管の螢光体から外部に放射
される光信号を上記ビーム走査面の往復移動に同
期させて所定の周波数及び所定の振幅を以つて往
復移動させて、上記ビーム走査面の往復移動によ
る画面の揺動の視覚的補正を行なう揺動補正手段
とを備え、上記カラー陰極線管の画面の視覚的残
像時間内に、上記螢光体層よりの光信号イメージ
成分の打消を行なう逆相イメージ成分を発生させ
るように、上記補助偏向手段並びに上記揺動の補
正手段による往復移動の各々について、上記所定
の方向、所定の周波数及び所定の振幅の選定を行
なつたことを特徴とするカラー陰極線管を有する
表示装置。1. A main deflection means for beam scanning the phosphor layer and mask of a color cathode ray tube, and a beam scanning surface of the main deflection means by the beam are reciprocated in a predetermined direction with a predetermined frequency and a predetermined amplitude. an auxiliary deflection means for performing auxiliary deflection of the beam so that the beam is auxiliary deflected, and an optical signal emitted to the outside from the phosphor of the color cathode ray tube is synchronized with the reciprocating movement of the beam scanning surface to obtain a predetermined frequency and a predetermined amplitude. and a fluctuation correction means for visually correcting the fluctuation of the screen due to the reciprocation of the beam scanning surface by reciprocating the beam scanning surface. For each reciprocating movement by the auxiliary deflection means and the rocking correction means, the predetermined direction, the predetermined frequency, and the predetermined predetermined frequency are set so as to generate an opposite-phase image component that cancels the optical signal image component from the body layer. 1. A display device having a color cathode ray tube, characterized in that the amplitude of the amplitude is selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7785579A JPS562793A (en) | 1979-06-20 | 1979-06-20 | Display unit having color cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7785579A JPS562793A (en) | 1979-06-20 | 1979-06-20 | Display unit having color cathode-ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS562793A JPS562793A (en) | 1981-01-13 |
| JPS6238915B2 true JPS6238915B2 (en) | 1987-08-20 |
Family
ID=13645668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7785579A Granted JPS562793A (en) | 1979-06-20 | 1979-06-20 | Display unit having color cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS562793A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL101615A0 (en) * | 1991-05-20 | 1992-12-30 | Hughes Aircraft Co | Image enhancement system for color video display |
-
1979
- 1979-06-20 JP JP7785579A patent/JPS562793A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS562793A (en) | 1981-01-13 |
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