JPS6248959B2 - - Google Patents
Info
- Publication number
- JPS6248959B2 JPS6248959B2 JP2442481A JP2442481A JPS6248959B2 JP S6248959 B2 JPS6248959 B2 JP S6248959B2 JP 2442481 A JP2442481 A JP 2442481A JP 2442481 A JP2442481 A JP 2442481A JP S6248959 B2 JPS6248959 B2 JP S6248959B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- color
- zero magnetic
- raster
- zero
- 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
- 238000000034 method Methods 0.000 claims description 3
- 238000010894 electron beam technology Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
【発明の詳細な説明】
本発明は、カラーテレビの調整を行う場合に簡
単に零磁界条件を作ることのできる方法を提供し
ようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention aims to provide a method that can easily create a zero magnetic field condition when adjusting a color television.
カラーテレビの調整において、ピユリテイ調整
はブラウン管の陰極より放射される電子ビームが
シヤドウマスクを通り、正しく螢光面に当るよう
にするものであり、仮に電子ビームのずれが発生
するとブラウン管面上に色むらとなつて現われ、
正しい色が再現されなくなる。 In the adjustment of color TVs, the pilotage adjustment is to ensure that the electron beam emitted from the cathode of the cathode ray tube passes through a shadow mask and correctly hits the fluorescent surface.If the electron beam shifts, it will cause color unevenness on the surface of the cathode ray tube. It appeared as a
Correct colors are no longer reproduced.
ところで、電子ビームは磁界によつて偏向を受
けるため、電子ビームが正確に決められた螢光面
（体）に当るようにピユリテイ調整をする必要が
ある。したがつて、このピユリテイ調整時には外
部の余計な磁気を零磁界を発生させることにより
遮断しなければならない。 By the way, since the electron beam is deflected by the magnetic field, it is necessary to adjust the intensity so that the electron beam hits an accurately determined fluorescent surface (body). Therefore, when performing this tightness adjustment, it is necessary to cut off extraneous external magnetism by generating a zero magnetic field.
すなわち、ある磁界を受けたままピユリテイ調
整がされると、その磁界の反対方向の力を受けた
とき、ピユリテイが大きくずれて色むらが発生し
てしまう。そこで、予め零磁界の条件でピユリテ
イを調整しておけば、その後、外部磁界におかれ
たとき、あらゆる方向（方角）で受ける影響が等
分になり、色むらの発生を抑えることが可能とな
る。なお、ここでいう外部磁界とは一般に地磁気
を示す。 That is, if the tightness is adjusted while being subjected to a certain magnetic field, when a force in the opposite direction of the magnetic field is applied, the tightness will shift significantly and color unevenness will occur. Therefore, if you adjust the purity in advance under zero magnetic field conditions, then when exposed to an external magnetic field, the influence will be equally distributed in all directions, making it possible to suppress the occurrence of color unevenness. Become. Note that the external magnetic field here generally refers to earth's magnetism.
このカラーテレビのピユリテイ調整時に零磁界
に調整するために従来は、ガウスメータ等の高価
な精密機器を要していた。したがつて、安価に零
磁界を調整することのできる手段の開発が望まれ
ていた。 Conventionally, expensive precision equipment such as a Gauss meter was required to adjust the magnetic field to zero when adjusting the readiness of a color television. Therefore, it has been desired to develop means that can adjust the zero magnetic field at low cost.
本発明は上記問題点に鑑み、ヘルムホルツコイ
ルを用いて簡単に零磁界の調整が行えるようにす
るものである。 In view of the above-mentioned problems, the present invention enables easy adjustment of the zero magnetic field using a Helmholtz coil.
以下、本発明につき、その一実施例の装置を示
す図面を参照して説明する。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to drawings showing an apparatus according to an embodiment thereof.
まず、第１図のように、ヘルムホルツコイル
L1〜L4を設け、それぞれにスイツチS1，S2と、
可変電源V1，V2を接続する。A1，A2は電流計で
ある。その中央部分にカラーテレビTVを置く。
カラーテレビTVはサービススイツチを操作し
て、横線１本のラスターにしておくとよい。 First, as shown in Figure 1, the Helmholtz coil
L 1 to L 4 are provided, each with switches S 1 and S 2 ,
Connect variable power supplies V 1 and V 2 . A 1 and A 2 are ammeters. Place a color TV in the center.
For color TVs, operate the service switch and set it to raster with one horizontal line.
そして、まずスイツチS1，S2を切断した状態で
カラーテレビTVを水平に回転させる。すると、
そのときに地磁気の影響でラスターが上下に移動
するので、第２図Ａ，Ｂのようにその最も移動し
た両端の位置をCRT上にしるしておく。その
後、調整すべき方向に向け、スイツチS1，S2を閉
じ、電源V1，V2を調整して、ラスターの位置が
移動両端の丁度中央になるようにヘルムホルツコ
イルL1〜L4の電流を調整することにより、カラ
ーテレビTVの位置が零磁界になるようにするこ
とができる。 First, the color television TV is rotated horizontally with switches S 1 and S 2 disconnected. Then,
At this time, the raster moves up and down due to the influence of the earth's magnetic field, so mark the positions of the two ends that have moved the most on the CRT, as shown in Figure 2 A and B. Then, turn the Helmholtz coils L 1 to L 4 in the direction to be adjusted, close the switches S 1 and S 2 , adjust the power supplies V 1 and V 2 , and turn the Helmholtz coils L 1 to L 4 so that the raster position is exactly in the center of both ends of the movement. By adjusting the current, the position of the color television TV can be brought to zero magnetic field.
なお、垂直方向にも同様のことを行えば、同様
に零磁界に調整できる。 Note that if the same thing is done in the vertical direction, the magnetic field can be adjusted to zero in the same way.
以上のように、本発明によれば、ピユリテイ調
整時における、外部の余計な磁気をヘルムホルツ
コイルにて零磁界を発生させることにより遮断す
ることができるものであり、その調整は容易に行
え、かつ安価な手段にて達成できるものである。 As described above, according to the present invention, extraneous external magnetism can be blocked by generating a zero magnetic field with a Helmholtz coil when adjusting the power, and the adjustment can be easily performed. This can be achieved by inexpensive means.
第１図は本発明の零磁界調整方法を実施する一
例の装置の回路図、第２図Ａ，Ｂはその調整状態
を示す正面図である。
L1〜L4……ヘルムホルツコイル、S1，S2……
スイツチ、V1，V2……可変電源。
FIG. 1 is a circuit diagram of an example of an apparatus for implementing the zero magnetic field adjustment method of the present invention, and FIGS. 2A and 2B are front views showing the adjustment state thereof. L 1 ~ L 4 ... Helmholtz coil, S 1 , S 2 ...
Switch, V 1 , V 2 ... variable power supply.
Claims (1)
部分にカラーテレビを置き、このカラーテレビを
回転させてそのラスターが最も移動した両端位置
を求め、その後、上記ヘルムホルツコイルに電流
を流して上記カラーテレビのラスターが上記両端
位置の中央部分になるように前記電流の量を調節
し、ヘルムホルツコイルに零磁界を発生させるこ
とを特徴とする零磁界調整方法。1. Install Helmholtz coils around all sides, place a color TV in the center, rotate this color TV to find the positions at both ends where the raster has moved the most, and then apply current to the Helmholtz coil to change the raster of the color TV. A method for adjusting a zero magnetic field, characterized in that the amount of the current is adjusted so that the current is at the center of the two end positions, and a zero magnetic field is generated in a Helmholtz coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2442481A JPS57138270A (en) | 1981-02-20 | 1981-02-20 | Adjusting method of color television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2442481A JPS57138270A (en) | 1981-02-20 | 1981-02-20 | Adjusting method of color television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57138270A JPS57138270A (en) | 1982-08-26 |
| JPS6248959B2 true JPS6248959B2 (en) | 1987-10-16 |
Family
ID=12137766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2442481A Granted JPS57138270A (en) | 1981-02-20 | 1981-02-20 | Adjusting method of color television |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57138270A (en) |
-
1981
- 1981-02-20 JP JP2442481A patent/JPS57138270A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57138270A (en) | 1982-08-26 |
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