JPS58220B2 - How to adjust the image reception condition in a television receiver - Google Patents
How to adjust the image reception condition in a television receiverInfo
- Publication number
- JPS58220B2 JPS58220B2 JP49021195A JP2119574A JPS58220B2 JP S58220 B2 JPS58220 B2 JP S58220B2 JP 49021195 A JP49021195 A JP 49021195A JP 2119574 A JP2119574 A JP 2119574A JP S58220 B2 JPS58220 B2 JP S58220B2
- Authority
- JP
- Japan
- Prior art keywords
- television receiver
- circuit
- voltage
- antenna
- abl
- 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
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Television Receiver Circuits (AREA)
Description
【発明の詳細な説明】
本発明はテレビジョン受像機の受像状態調整方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting the image reception condition of a television receiver.
現在、テレビジョン受像機の受像状態を最良の状態に調
整する方法としては、テレビジョン受像機の選局機構（
チューナ）以降の回路を制御する方法、例えばローカル
発振周波数を自動的に制御する方法（ＡＦＴあるいはＡ
ＦＣと呼ばれている）またローカル周波数の変化をブラ
ウン管上の画面変化（グリーンベルトあるいはブラック
ベルトで表示するものでマジックライン（登録商標）等
と呼ばれている）として表示する方法等が使用されてい
るが、ロッドアンテナ等の調整可能なアンテナを用いて
受像状態を最良のものに調整する方法においては、その
最良点を正確且つ明確に表示するものは全くなかった。Currently, the best way to adjust the reception condition of a television receiver is to use the television receiver's channel selection mechanism (
A method of controlling the circuit after the tuner), such as a method of automatically controlling the local oscillation frequency (AFT or A
Also, methods are used to display changes in local frequency as changes on the screen on a cathode ray tube (represented by green belts or black belts and are called magic lines (registered trademark)). However, in the method of adjusting the image reception state to the best one using an adjustable antenna such as a rod antenna, there is no method that accurately and clearly indicates the best point.
そこで本発明はロッドアンテナ等の調整自在なアンテナ
を使用して受像状態を調整するテレビジョン受像機にお
いて、アンテナの方向、長さの変化による電界強度変化
を画面の明るさの変化として表示させて、常に最良の状
態で受像できるように容易に調整することが可能な調整
方法を提供しようとするものである。Therefore, the present invention is a television receiver that uses an adjustable antenna such as a rod antenna to adjust the image reception state, and displays changes in electric field strength due to changes in antenna direction and length as changes in screen brightness. The object of the present invention is to provide an adjustment method that can be easily adjusted so that images can always be received in the best condition.
以下、本発明の一実施例を図面に基づき説明する。Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図中、１は選局回路および増幅回路を含む回路（前
者をチューナ回路、後者を映像中間周波数増幅回路と呼
んでいる）、２はＡＢＬ回路（自動輝度制御回路）であ
る。In FIG. 1, 1 is a circuit including a channel selection circuit and an amplifier circuit (the former is called a tuner circuit, and the latter is called a video intermediate frequency amplification circuit), and 2 is an ABL circuit (automatic brightness control circuit).
Ｃ１は回路１とトランジスタＴＲ１との結合コンデンサ
、Ｒ１Ｒ２およびＲ３はトランジスタＴＲ１のバイアス
抵抗、トランジスタＴＲ１はキャリア増幅用のトランジ
スタである。C1 is a coupling capacitor between circuit 1 and transistor TR1, R1R2 and R3 are bias resistors of transistor TR1, and transistor TR1 is a carrier amplification transistor.
コンデンサＣ２およびＣ３はトランスＴ１と共にビデオ
キャリア周波数の共振回路を構成している。Capacitors C2 and C3 constitute a video carrier frequency resonant circuit together with transformer T1.
また、ダイオードＤ１とコンデンサＣ４およびＣ５とコ
イルＬ１とはビデオキャリアを検波して直流電圧を作り
出すためのものである。Further, the diode D1, the capacitors C4 and C5, and the coil L1 are used to detect the video carrier and generate a DC voltage.
次にその動作原理を説明する。Next, the principle of operation will be explained.
今、ロッドアンテナ３の回転動作によりテレビジョン受
像機の入力電界が変化すると、トランジスタＴＲ１およ
びトランスＴ１はビデオキャリアの周波数に同調してい
るので、この入力電界の変化によってビデオキャリアの
増幅量が変化し、トランジスタＴＲ１で増幅されたビデ
オキャリアがダイオードＤ１コンデンサＣ３およびＣ４
、コイルＬ１からなる検波回路で整流されて直流電圧が
作り出される。Now, when the input electric field of the television receiver changes due to the rotational operation of the rod antenna 3, the amount of amplification of the video carrier changes due to the change in the input electric field, since the transistor TR1 and the transformer T1 are tuned to the frequency of the video carrier. The video carrier amplified by transistor TR1 is connected to diode D1 and capacitors C3 and C4.
, and is rectified by a detection circuit consisting of a coil L1 to produce a DC voltage.
この直流電圧はビデオキャリアの増幅量が大きい程太き
い。This DC voltage is thicker as the amplification amount of the video carrier is larger.
つまり、ロッドアンテナ３の受像条件（長さ、方向等）
が良ければ良い程大きいことになる。In other words, the image reception conditions (length, direction, etc.) of the rod antenna 3
The better it is, the bigger it is.
そして、この直流流電圧はＡＢＬ回路２の動作電圧とし
て加えられる。This DC voltage is then applied as the operating voltage of the ABL circuit 2.
尚この時、ＡＢＬ回路２には従来からの制御電圧が端子
４から加えられている。At this time, a conventional control voltage is applied to the ABL circuit 2 from the terminal 4.
従って、ＡＢＬ電流（ブラウン管のビーム電流）の調整
時およびロンドアンテナ調整後には、影響の出ないよう
に切離しのためのスイッチ５が設けられている。Therefore, when adjusting the ABL current (beam current of the cathode ray tube) and after adjusting the Rondo antenna, a switch 5 is provided for disconnecting so as not to affect the adjustment.
そこで、上記検波出力（検波回路からの直流電圧）を、
ブラウン管の画面が明るくなる方向で加えると、ロンド
アンテナ３の条件が良い程、画面が明るくなる。Therefore, the above detection output (DC voltage from the detection circuit) is
When added in the direction of brightening the screen of the cathode ray tube, the better the conditions of Rondo antenna 3, the brighter the screen becomes.
このとき、ＡＧＣ動作は通常通り行なわれており、その
ＡＧＣ動作による画面の安定はなされている。At this time, the AGC operation is being performed as usual, and the screen is stabilized by the AGC operation.
従って、テレビジョン受像機のユーザーは画面が一番間
るくなる方向あるいは長さにロンドアンテナ３を調整す
ることにより、最良受像状態が得られることになる。Therefore, the user of the television receiver can obtain the best image reception condition by adjusting the Rondo antenna 3 in the direction or length where the screen is the shortest.
第２図はブラウン管の明るさと、ＡＢＬ制御電圧との関
係を示し、Ａは従来のＡＢＬ制御電圧、またＢは本発明
方法によるＡＢＩ制御亀圧であって、従来のＡＢＬ制御
電圧Ａに、検波整流されたビデオキャリアの直流電圧分
が上積みされて、本発明方法によるＡＢＬ制御電圧Ｂが
作り出されている。Figure 2 shows the relationship between the brightness of the cathode ray tube and the ABL control voltage, where A is the conventional ABL control voltage and B is the ABI control pressure according to the method of the present invention. The DC voltage component of the rectified video carrier is added up to create the ABL control voltage B according to the method of the invention.
なお、上記実施例では、検波回路からの直流電圧をブラ
ウン管の画面が明るくなるように加える例を説明したが
、検波ダイオードＤ１の方向により、暗くなる方向へ加
えて制御されることも可能である。In addition, in the above embodiment, an example was explained in which the DC voltage from the detection circuit is applied so that the screen of the cathode ray tube becomes bright, but it is also possible to control the DC voltage to be applied in the direction of making it darker depending on the direction of the detection diode D1. .
以上詳述せる如く本発明方法においては、アンテナによ
る指向性および最良電界強度をブラウン管画面上の輝度
変化として表示せしめるため、テレビジョン受像機の受
像状態変化を容易に調整して常に最良の受像画面を得る
ようにできる。As detailed above, in the method of the present invention, in order to display the antenna directivity and the best electric field strength as changes in brightness on the CRT screen, changes in the reception state of the television receiver can be easily adjusted to always provide the best reception screen. It is possible to obtain
またＡＢＬ回路を有効に利用したので、通常のテレビジ
ョン受像機にビデオキャリアの検波回路を付加するだけ
で実現でき、回路構成を極めて簡単にし得る。Furthermore, since the ABL circuit is effectively utilized, it can be realized by simply adding a video carrier detection circuit to a normal television receiver, making the circuit configuration extremely simple.
また、ＡＢＬ回路を制御するようにしたので、画面の明
るさを確実に制御し得る。Furthermore, since the ABL circuit is controlled, the brightness of the screen can be reliably controlled.
図面は本発明にかかるテレビジョン受像機における受像
状態調整方法を説明するためのもので、第１図はその原
理を説明する電気回路図、第２図はブラウン管の輝度と
ＡＢＬ制御電圧の関係を示す図である。
１・・・選局回路および増幅回路を含む回路、２・・・
ＡＢＬ回路（自動輝度制御回路）、３・・・ロンドアン
テナ、４・・・端子、５・・・スイッチ、Ｃ１・・・回
路１とトランジスタＴＲ１との結合コンデンサ、Ｒ１，
Ｒ２，Ｒ３・・・バイアス抵抗、ＴＲ１・・・キャリア
増幅用トランジスタ、Ｃ２、Ｃ３、Ｔ１・・・ビデオキ
ャリア周波数の共振回路を構成するコンデンサとトラン
ス、Ｄｌ、Ｃ４，Ｃ５，Ｌｌ・・・ビデオキャリアを検
波して直流電圧を作り出すためのダイオードとコンデン
サおよびコイル。The drawings are for explaining the method of adjusting the image reception state in a television receiver according to the present invention. Fig. 1 is an electric circuit diagram explaining the principle, and Fig. 2 shows the relationship between the brightness of the cathode ray tube and the ABL control voltage. FIG. 1...Circuit including a tuning circuit and an amplifier circuit, 2...
ABL circuit (automatic brightness control circuit), 3... Rondo antenna, 4... terminal, 5... switch, C1... coupling capacitor between circuit 1 and transistor TR1, R1,
R2, R3...Bias resistor, TR1...Transistor for carrier amplification, C2, C3, T1...Capacitor and transformer forming a resonant circuit for video carrier frequency, Dl, C4, C5, Ll...Video Diodes, capacitors, and coils to detect carriers and create DC voltage.
Claims (1)
レビジョン受像機において、映像検波回路の出力のビデ
オキャリアを検波して得られる直流電圧をＡＢＬ電圧と
合成して新たなＡＢＬ制御電圧を得、このＡＢＬ制御電
圧を用いて画面の輝度を変化させることにより、上記ア
ンテナの指向性および最良電界強度をブラウン管の画面
上の輝度変化にて表示することを特徴とするテレビジョ
ン受像機における受像状態調整方法。1. In a television receiver equipped with an adjustable antenna such as a rod antenna, the DC voltage obtained by detecting the video carrier output from the video detection circuit is combined with the ABL voltage to obtain a new ABL control voltage. A method for adjusting image reception conditions in a television receiver, characterized in that the directivity of the antenna and the best electric field strength are displayed by changing the brightness on the screen of a cathode ray tube by changing the brightness of the screen using an ABL control voltage. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49021195A JPS58220B2 (en) | 1974-02-22 | 1974-02-22 | How to adjust the image reception condition in a television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49021195A JPS58220B2 (en) | 1974-02-22 | 1974-02-22 | How to adjust the image reception condition in a television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50115923A JPS50115923A (en) | 1975-09-10 |
| JPS58220B2 true JPS58220B2 (en) | 1983-01-05 |
Family
ID=12048169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49021195A Expired JPS58220B2 (en) | 1974-02-22 | 1974-02-22 | How to adjust the image reception condition in a television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58220B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62168477A (en) * | 1986-01-20 | 1987-07-24 | Matsushita Electric Ind Co Ltd | Electric field strength display device |
| JPS62168476A (en) * | 1986-01-20 | 1987-07-24 | Matsushita Electric Ind Co Ltd | Electric field strength display device |
| JPH0649016Y2 (en) * | 1987-05-29 | 1994-12-12 | シャープ株式会社 | Small television receiver |
-
1974
- 1974-02-22 JP JP49021195A patent/JPS58220B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50115923A (en) | 1975-09-10 |
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