JPH01105286U - - Google Patents
Info
- Publication number
- JPH01105286U JPH01105286U JP20127187U JP20127187U JPH01105286U JP H01105286 U JPH01105286 U JP H01105286U JP 20127187 U JP20127187 U JP 20127187U JP 20127187 U JP20127187 U JP 20127187U JP H01105286 U JPH01105286 U JP H01105286U
- Authority
- JP
- Japan
- Prior art keywords
- black level
- preamplifiers
- output
- control voltage
- level control
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は第１図の具体例を示す回路図、第３図は
従来例を示すブロツク図である。
２１〜２３……プリアンプ、２７〜２９……出
力アンプ、３０……カラーＣＲＴ、３１〜３３…
…カソード電極、３７，３９，４１……カツトオ
フ調整部、３８，４０，４２……白バランス調整
部、４３……明るさ調整部、４４……明るさコン
トロール。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a circuit diagram showing a specific example of FIG. 1, and FIG. 3 is a block diagram showing a conventional example. 21-23...Preamplifier, 27-29...Output amplifier, 30...Color CRT, 31-33...
...Cathode electrode, 37, 39, 41...Cutoff adjustment section, 38, 40, 42...White balance adjustment section, 43...Brightness adjustment section, 44...Brightness control.
Claims (1)
きる黒レベルクランプ機能を有するプリアンプと
、このプリアンプの出力が供給される出力アンプ
とが、赤、緑、青の各色毎に設けられ、前記各色
毎の前記各出力アンプの出力端を夫々カラーＣＲ
Ｔの対応するカソード電極に接続し、カソード電
極まで直流的に直結してなるカラーＣＲＴデイス
プレイ用ビデオアンプにおいて、カツトオフ調整
時には前記各プリアンプの黒レベル制御電圧を独
立して供給するために、前記各プリアンプの夫々
に対応して設けられた各カツトオフ調整部と、カ
ツトオフ調整時を除き前記各プリアンプの黒レベ
ル制御電圧を供給するために、しかも白バランス
調整時には前記各プリアンプの黒レベル制御電圧
を独立して制御すべく供給するために、前記各プ
リアンプの夫々に対応して設けられ、かつ出力の
黒レベル制御電圧が明るさ調整部の出力とトラツ
キングをもつべく構成された各白バランス調整部
を具備してなることを特徴とするカラーＣＲＴデ
イスプレイ用ビデオアンプ。 A preamplifier having a black level clamp function that can control the black level voltage using a black level control voltage, and an output amplifier to which the output of this preamplifier is supplied are provided for each color of red, green, and blue. Color CR for each output end of each output amplifier
In a color CRT display video amplifier which is connected to the corresponding cathode electrode of T and is directly connected to the cathode electrode in a direct current manner, each of the preamplifiers is Each cutoff adjustment section is provided corresponding to each of the preamplifiers, and in order to supply the black level control voltage of each of the preamplifiers except when adjusting cutoff, and when adjusting the white balance, the black level control voltage of each of the preamplifiers is independently controlled. In order to control and supply the brightness, each white balance adjustment section is provided corresponding to each of the preamplifiers and configured so that the output black level control voltage tracks the output of the brightness adjustment section. A video amplifier for color CRT display, which is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20127187U JPH01105286U (en) | 1987-12-29 | 1987-12-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20127187U JPH01105286U (en) | 1987-12-29 | 1987-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01105286U true JPH01105286U (en) | 1989-07-14 |
Family
ID=31491641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20127187U Pending JPH01105286U (en) | 1987-12-29 | 1987-12-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01105286U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012104489A (en) * | 2011-12-12 | 2012-05-31 | Seiko Epson Corp | Projector and control method of projector |
-
1987
- 1987-12-29 JP JP20127187U patent/JPH01105286U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012104489A (en) * | 2011-12-12 | 2012-05-31 | Seiko Epson Corp | Projector and control method of projector |
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