JPS59194792U - brightness adjustment circuit - Google Patents
brightness adjustment circuitInfo
- Publication number
- JPS59194792U JPS59194792U JP8784683U JP8784683U JPS59194792U JP S59194792 U JPS59194792 U JP S59194792U JP 8784683 U JP8784683 U JP 8784683U JP 8784683 U JP8784683 U JP 8784683U JP S59194792 U JPS59194792 U JP S59194792U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- transistors
- common
- adjustment circuit
- amplifier
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の輝度調整回路の回路を示す回路図、第２
図は本考案に係る輝度調整回路の回路を示す回路図であ
る。
Ｑ工〜Ｑ３・・・・・・増幅用トランジスタ、Ｑ４〜Ｑ
６・・曲出力用トランジスタ、Ｑ７〜Ｑ９・・・・・・
制御用トランジスタ、ＶＲ，・・・・・・可変抵抗器、
Ｒ工〜Ｒ３，Ｒ８−Ｒ１゜。
Ｒ１１・・・・・・抵抗。Figure 1 is a circuit diagram showing a conventional brightness adjustment circuit;
The figure is a circuit diagram showing a brightness adjustment circuit according to the present invention. Q engineering~Q3...Amplification transistor, Q4~Q
6...Transistor for song output, Q7-Q9...
Control transistor, VR, ...variable resistor,
R engineering ~ R3, R8-R1°. R11...Resistance.
Claims (1)
を、ベース接地コレクタ出力型第２トランジスタのエミ
ッタにカスケード接続してなる増幅器をＲ，Ｇ、 Ｂ３
原色について３個最列に設け、各増幅器の前記第１トラ
ンジスタの増幅度を前記第１トランジスタのベースに入
力する信号の特定、信号期間に夫々独立に調整できるよ
うにして前記特定信号の輝度を高める輝度調整回路にお
いて、前記各増幅器のカスケード接続点を各増幅器たつ
いて夫々設けた第３トランジスタのコレクタに接続し、
この第３トランジスタのエミッタは夫々抵抗を介して接
地し、かつこの第３トランジスタのベースを共通に接続
しその共通接続点に前記第３トランジ冬夕の出力電流を
共通に可変するための可変抵抗手段を設けて成り、前記
可変抵抗手段の抵抗値を可変することによって前記特定
信号期間に前記各第１トランジスタの増幅度を調整でき
るよう＆千した輝度調整回路。R, G, B3 are amplifiers in which the collector of a first transistor of common emitter base input type is cascade-connected to the emitter of a second transistor of common base collector output type.
Three transistors for primary colors are provided in the most row, and the amplification degree of the first transistor of each amplifier can be adjusted independently to specify the signal input to the base of the first transistor and during the signal period, so as to adjust the brightness of the specific signal. In the brightness adjustment circuit for increasing brightness, the cascade connection point of each amplifier is connected to the collector of a third transistor provided for each amplifier,
The emitters of the third transistors are each grounded through a resistor, and the bases of the third transistors are connected in common, and a variable resistor is connected to the common connection point to commonly vary the output current of the third transistor Touya. A brightness adjustment circuit comprising means for adjusting the amplification degree of each of the first transistors during the specific signal period by varying the resistance value of the variable resistance means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8784683U JPS59194792U (en) | 1983-06-10 | 1983-06-10 | brightness adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8784683U JPS59194792U (en) | 1983-06-10 | 1983-06-10 | brightness adjustment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59194792U true JPS59194792U (en) | 1984-12-25 |
Family
ID=30217759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8784683U Pending JPS59194792U (en) | 1983-06-10 | 1983-06-10 | brightness adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59194792U (en) |
-
1983
- 1983-06-10 JP JP8784683U patent/JPS59194792U/en active Pending
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