JPS6356871U - - Google Patents
Info
- Publication number
- JPS6356871U JPS6356871U JP15008486U JP15008486U JPS6356871U JP S6356871 U JPS6356871 U JP S6356871U JP 15008486 U JP15008486 U JP 15008486U JP 15008486 U JP15008486 U JP 15008486U JP S6356871 U JPS6356871 U JP S6356871U
- Authority
- JP
- Japan
- Prior art keywords
- television
- electric field
- detection means
- television receiver
- circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Description
第１図は本考案になるテレビジヨン受像機の一
実施例の要部である文字表示回路を示す図、第２
図は本考案を適用するテレビジヨン受像機の構成
を示す簡単なブロツク系統図、第３図は従来の文
字表示回路の一例を示す回路図、第４図は本考案
が解決しようとする問題点である自己ゴーストを
示す図である。
１……オンスクリーンＩＣ、２……陰極線管（
ＣＲＴ）、３……受信アンテナ、４……チユーナ
、５……映像中間周波増幅回路（ＩＦ増幅回路）
、６……映像検波回路、７……映像増幅回路、８
……色復調回路、９……マトリツクス回路、１０
……同期分離偏向回路、１１……ＡＧＣ回路（自
動利得制御回路）、１２……ＡＧＣ入力端子、Ｃ
１，Ｃ２……コンデンサ（Ｃ２は高調波成分除去
用）、Ｑ１，Ｑ２……ＮＰＮトランジスタ、Ｒ１
〜Ｒ９……抵抗、ＳＷ……アナログスイツチ。
FIG. 1 is a diagram showing a character display circuit which is a main part of an embodiment of the television receiver according to the present invention, and FIG.
The figure is a simple block system diagram showing the configuration of a television receiver to which the present invention is applied, Figure 3 is a circuit diagram showing an example of a conventional character display circuit, and Figure 4 is a problem to be solved by the present invention. FIG. 2 is a diagram showing a self-ghost. 1...On-screen IC, 2...Cathode ray tube (
CRT), 3...Receiving antenna, 4...Tuner, 5...Video intermediate frequency amplification circuit (IF amplification circuit)
, 6...Video detection circuit, 7...Video amplification circuit, 8
...Color demodulation circuit, 9...Matrix circuit, 10
... Synchronous separation deflection circuit, 11 ... AGC circuit (automatic gain control circuit), 12 ... AGC input terminal, C
1 , C 2 ... Capacitor (C 2 is for harmonic component removal), Q 1 , Q 2 ... NPN transistor, R 1
~ R9 ...Resistance, SW...Analog switch.
Claims (1)
文字信号による表示文字を重畳して表示する機能
を有するテレビジヨン受像機において、 テレビジヨン放送電波の入力電界を検知する検
知手段と、 この検知手段が前記テレビジヨン放送電波の入
力電界が弱電界であることを検知した時に前記文
字信号の高調波成分を除去する除去手段とを設け
たことを特徴とするテレビジヨン受像機。 (2) 検知手段は、テレビジヨン映像信号処理回
路中のＡＧＣ回路の出力電圧の変化によつて検知
するようにしたことを特徴とする実用新案登録請
求の範囲第１項記載のテレビジヨン受像機。[Scope of Claim for Utility Model Registration] (1) In a television receiver that has the function of superimposing and displaying display characters based on character signals on a display screen based on television video signals, detecting the input electric field of television broadcast radio waves. A television receiver comprising: a detection means; and a removal means for removing harmonic components of the character signal when the detection means detects that the input electric field of the television broadcast radio wave is a weak electric field. Machine. (2) The television receiver according to claim 1, wherein the detection means detects by a change in the output voltage of an AGC circuit in a television video signal processing circuit. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15008486U JPS6356871U (en) | 1986-09-30 | 1986-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15008486U JPS6356871U (en) | 1986-09-30 | 1986-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6356871U true JPS6356871U (en) | 1988-04-15 |
Family
ID=31065896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15008486U Pending JPS6356871U (en) | 1986-09-30 | 1986-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6356871U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6352355B2 (en) * | 1983-01-13 | 1988-10-18 | Westinghouse Electric Corp |
-
1986
- 1986-09-30 JP JP15008486U patent/JPS6356871U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6352355B2 (en) * | 1983-01-13 | 1988-10-18 | Westinghouse Electric Corp |
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