JPS59164376U

JPS59164376U - Beam index type color television receiver

Info

Publication number: JPS59164376U
Application number: JP6009183U
Authority: JP
Inventors: 康夫船造
Original assignee: 三洋電機株式会社
Priority date: 1983-04-19
Filing date: 1983-04-19
Publication date: 1984-11-05

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

[Brief explanation of the drawing]

第１図は螢光面の配列説明図、第２図は従来のビームイ
ンデックス型カラーテレビジョン受像機のブロック図、
第３図ａ、　　ｂ、　　ｃは第２図にょる′　　□３原
色それぞれの再生時のビーム電流波形図、第一４図はこ
の考案のビームインデックス型カラーテ　　　　ルビジ
ョン受像機の１実施例のブロック図、第５図ａ、　　ｂ
、　　ｃは第４図による３原色それぞれの再生時のビー
ム電流波形図である。１・・・受像管、２・・・光検出器、３．　６．　９・
・・第１ないし第３バンドパスフイルタ、４，７・・・
第１、第２混合器、５・・・搬送波端子、８・・・クロ
マ端子、１０・・・加算器、１１・・・輝度端子、１２
．１５・・・第１、第２ビデオアンプ、１４・・・アナ
ログスイッチ、１６・・・差動アンプ、Ｒ，Ｇ、　Ｂ・
・・赤、緑、青色螢光体、■・・・インデックス螢光体
。Figure 1 is an explanatory diagram of the arrangement of fluorescent surfaces, Figure 2 is a block diagram of a conventional beam index type color television receiver,
Figures 3a, b, and c are from Figure 2' □Beam current waveform diagram during reproduction of each of the three primary colors, Figure 14 is a block diagram of one embodiment of the beam index type color television receiver of this invention. Fig. 5a, b
, c are beam current waveform diagrams during reproduction of each of the three primary colors according to FIG. 1... Picture tube, 2... Photodetector, 3. 6. 9・
・First to third band pass filters, 4, 7...
1st and 2nd mixers, 5...carrier terminal, 8...chroma terminal, 10...adder, 11...luminance terminal, 12
．． 15... First and second video amplifiers, 14... Analog switch, 16... Differential amplifier, R, G, B.
...Red, green, blue phosphors, ■... Index phosphors.

Claims

[Scope of utility model registration request]

On the phosphor surface of the picture tube, three primary color phosphors in stripes perpendicular to the horizontal scanning direction are arranged repeatedly in the horizontal scanning direction, and index phosphors in stripes perpendicular to the horizontal scanning direction are arranged repeatedly in the horizontal scanning direction. The fluorescent surface is scanned with a beam repeatedly in the horizontal scanning direction at a period that is an integral multiple of the arrangement period of the three primary color phosphors, and a single electron gun of the picture tube is used to scan the fluorescent surface. An index signal for beam position control based on the index phosphor is extracted and formed from the optical signal, and a luminance signal is added to a mixed signal of the index signal and color signal to provide a video signal for beam scanning to the picture tube. A beam index type color television receiver that outputs a beam index type color television receiver comprising: a pulse generator that outputs a gate pulse only during a scanning period of the index phosphor in response to input of the index signal; and a switch body operated by the gate pulse. and an output control section that cuts off the video signal during the scanning period and outputs a control signal of a predetermined constant level for controlling the beam amount constant to the picture tube.