JPH03480U - - Google Patents
Info
- Publication number
- JPH03480U JPH03480U JP5992889U JP5992889U JPH03480U JP H03480 U JPH03480 U JP H03480U JP 5992889 U JP5992889 U JP 5992889U JP 5992889 U JP5992889 U JP 5992889U JP H03480 U JPH03480 U JP H03480U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- signal
- diode
- transistor
- luminance signal
- 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.)
- Granted
Links
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Television Receiver Circuits (AREA)
Description
第１図は本考案の輝度信号補正回路を使用した
テレビの要部ブロツク図、第２図から第４図迄は
本考案の輝度信号補正回路の実施例を示す回路図
、第５図は前記の輝度信号補正回路の入／出力波
形図、第６図は受像管のカソードの変調特性図、
第７図は説明用の輝度信号波形図である。
１……チユーナ、２……ＩＦ、３……入／出力
回路、４……くし型フイルタ、５……黒レベル補
正回路、６……クロマテイクオフ、７……輝度信
号補正回路、８……映像処理回路、９……映像出
力、１０，２４……入力端子、１１，１３，１５
，１８，１９，２１，２２，２８，２９，３１，
３３……抵抗器、１２，２５……電源、１４，３
０……ダイオード、１６，１７，２６，３２……
トランジスタ、２０，３４……コンデンサ。
FIG. 1 is a block diagram of the main parts of a television using the brightness signal correction circuit of the present invention, FIGS. 2 to 4 are circuit diagrams showing embodiments of the brightness signal correction circuit of the present invention, and FIG. Figure 6 is the input/output waveform diagram of the luminance signal correction circuit, and Figure 6 is the modulation characteristic diagram of the cathode of the picture tube.
FIG. 7 is a luminance signal waveform diagram for explanation. 1... Tuner, 2... IF, 3... Input/output circuit, 4... Comb filter, 5... Black level correction circuit, 6... Chroma take-off, 7... Brightness signal correction circuit, 8... Video processing circuit, 9...Video output, 10, 24...Input terminal, 11, 13, 15
,18,19,21,22,28,29,31,
33...Resistor, 12,25...Power supply, 14,3
0...Diode, 16, 17, 26, 32...
Transistor, 20, 34... capacitor.
Claims (1)
号とに分離し、同輝度信号をエミツタ接地型の増
幅器のトランジスタのベースに入力せしめ、電源
電圧を第１の抵抗と第２の抵抗とで分割した第１
の電位に第１のダイオードのアノード側を接続し
、前記ダイオードのカソード側を前記トランジス
タのコレクタに接続してゲイン可変手段とし、輝
度信号の白レベルと灰色レベル間を非直線増幅し
た信号をトランジスタのコレクタより出力するこ
とを特徴とするテレビジヨン受像機の輝度信号補
正回路。 (2) 前記ゲイン可変手段と並列に、電源電圧を
第３の抵抗と第４の抵抗とで分割した第２の電位
に第２のダイオードのアノード側を接続し、前記
ダイオードのカソード側を前記トランジスタのコ
レクタに接続したことを特徴とする請求項(1)記
載のテレビジヨン受像機の輝度信号補正回路。 (3) テレビジヨンの映像信号を色信号と輝度信
号とに分離し、同輝度信号をコレクタ接地型の増
幅器のトランジスタのベースに入力せしめ、電源
電圧を第１の抵抗と第２の抵抗とで分割した電位
にダイオードのカソード側を接続し、前記ダイオ
ードのアノード側を前記トランジスタのエミツタ
に第３の抵抗を介して接続してゲイン可変手段と
し、輝度信号の白レベルと灰色レベル間を非直線
増幅した信号を前記ダイオードのアノード側と第
３の抵抗との接続箇所より出力することを特徴と
するテレビジヨン受像機の輝度信号補正回路。[Claims for Utility Model Registration] (1) A television video signal is separated into a chrominance signal and a luminance signal, and the luminance signal is inputted to the base of a transistor of a common emitter type amplifier, and the power supply voltage is The first resistor divided by the second resistor
The anode side of the first diode is connected to the potential of the first diode, and the cathode side of the diode is connected to the collector of the transistor to form a gain variable means, and a signal obtained by non-linear amplification between the white level and the gray level of the luminance signal is transferred to the transistor. A brightness signal correction circuit for a television receiver, characterized in that the circuit outputs a brightness signal from a collector. (2) In parallel with the gain variable means, the anode side of a second diode is connected to a second potential obtained by dividing the power supply voltage by a third resistor and a fourth resistor, and the cathode side of the second diode is connected to the second potential obtained by dividing the power supply voltage by a third resistor and a fourth resistor. 2. The brightness signal correction circuit for a television receiver according to claim 1, wherein the brightness signal correction circuit is connected to a collector of a transistor. (3) Separate the television video signal into a chrominance signal and a luminance signal, input the luminance signal to the base of a transistor of a common collector type amplifier, and connect the power supply voltage to the first resistor and second resistor. The cathode side of a diode is connected to the divided potential, and the anode side of the diode is connected to the emitter of the transistor via a third resistor to form a gain variable means, so that the difference between the white level and the gray level of the luminance signal is non-linear. A brightness signal correction circuit for a television receiver, characterized in that the amplified signal is output from a connection point between the anode side of the diode and a third resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5992889U JPH0741257Y2 (en) | 1989-05-24 | 1989-05-24 | Luminance signal correction circuit for television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5992889U JPH0741257Y2 (en) | 1989-05-24 | 1989-05-24 | Luminance signal correction circuit for television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03480U true JPH03480U (en) | 1991-01-07 |
| JPH0741257Y2 JPH0741257Y2 (en) | 1995-09-20 |
Family
ID=31586861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5992889U Expired - Fee Related JPH0741257Y2 (en) | 1989-05-24 | 1989-05-24 | Luminance signal correction circuit for television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741257Y2 (en) |
-
1989
- 1989-05-24 JP JP5992889U patent/JPH0741257Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741257Y2 (en) | 1995-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |