JPS60177549U

JPS60177549U - Video signal processing circuit in display device

Info

Publication number: JPS60177549U
Application number: JP1984064657U
Authority: JP
Inventors: 沢田　繁
Original assignee: 日本ビクター株式会社
Priority date: 1984-05-01
Filing date: 1984-05-01
Publication date: 1985-11-26

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案回路の一実施例を示すブロック系統図、
第２図は第一１図図示ブロック系統の動作説明用信号波
形図である。１・・・テレビジョン受像機、２・・・輝度信号入力端
　　　　　５子、３・・・搬送色信号入力端子、７〜９
・・・スイッチ回路、１０〜１２・・・三原色信号入力
環子、１３・・・高速切換信号入力端子、１４・・・ハ
ーフブランキング制御信号入力端子、１５・・・レベル
制御電圧入力端子、１６・・・制御電圧発生回路、１７
〜１９，２０−１〜２０−３・・・レベル制御回路、２
１・・・陰極線管（ＣＲＴ）。第２図　　　−− Ｉ・十１一゛−１、Ｃ−１１−− ｄ−」− １ＩＩ °徂− Ｃ１ｆ　　　＋１ □１ト」下９目ｉ・十− 一１Ｈ−ｍ１　　　　　　゛ ■FIG. 1 is a block diagram showing an embodiment of the circuit of the present invention;
FIG. 2 is a signal waveform diagram for explaining the operation of the block system shown in FIG. 11. 1... Television receiver, 2... Brightness signal input terminal 5 children, 3... Carrier color signal input terminal, 7 to 9
...Switch circuit, 10-12... Three primary color signal input ring, 13... High speed switching signal input terminal, 14... Half blanking control signal input terminal, 15... Level control voltage input terminal, 16... Control voltage generation circuit, 17
~19,20-1~20-3...Level control circuit, 2
1...Cathode ray tube (CRT). Figure 2 -- I ・11 1゛-1, C-1 1-- d-"-1 II °- C 1 f +1 □1t" Lower 9th i ・11-11H-m1 ゛■

Claims

[Scope of utility model registration request]

(1) A video signal processing circuit in a display device which has a function of supplying three primary color signals, a high speed switching signal, and a half blanking control signal via external input terminals, and superimposing an image based on the three primary color signals on the screen. Based on the addition mixed signal of the level control signal for the three primary color signals and the half blanking control signal, the incoming period of the half blanking control signal is greater than the non-incoming period of the three primary color signals. a demodulated video signal obtained by demodulating the composite video signal within the display device, and each of the three primary color signals from the first level control device; a switch circuit which selectively outputs the three primary color signals from the first level control means when the high-speed switching signal is received, and selectively outputs the demodulated video signal when the high-speed switching signal is not received; , a display comprising a second level control means for outputting the output signal of the switch circuit to the image display unit with the output signal of the switch circuit attenuated in level relatively during the input period of the half blanking control signal compared to the non-input period; video signal processing circuit in the device.

(2) The video signal processing circuit in the display device according to claim 1, wherein the demodulated video signal is a demodulated three primary color signal different from the three primary color signals from the external input terminal. - (3) the demodulated video signal is a demodulated three types of color difference signals and a luminance signal;
The switch circuit is supplied with the three color difference signals and the corresponding three primary color signals from the first level control means, and selectively outputs the three color difference signals or the three primary color signals.
2. The video signal processing circuit for a display device according to claim 1, which is a circuit that blocks transmission of the luminance signal when the three primary color signals are selectively output.