Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1989-12-12
1991-06-04
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2970, H01J 2972
Patent
active
050217194
ABSTRACT:
Disclosed is a display apparatus in which peculiar synchronizing signals fed while being accompanied by a video signal to be displayed are recognized, control signals for instructing picture scene size (display size) and picture display position optimum to the recognized synchronizing signals are generated by a digital automatic tracking circuit or the like, and horizontal and vertical deflection circuits are operated by the thus generated control signals so that a picture scene having optimum picture scene size and optimum display position is displayed on a display screen. The display apparatus is provided with: a synchronizing signal processing circuit for processing peculiar synchronizing signals fed thereto while being accompanied by the video signal so as to produce a horizontal synchronizing signal repeatedly occurring with a horizontal period and a vertical synchronizing signal repeatedly occurring with a vertical period; a memory for storing control information in advance; and a control processing circuit for recognizing a horizontal scanning frequency and a vertical scanning frequency on the basis of the horizontal synchronizing signal and the vertical synchronizing signal, and for reading out the control information from the memory on the basis of the result of recognition so as to produce and feed control signals for instructing picture display size and picture display position on the display screen to the horizontal deflection circuit and vertical deflection circuit.
Arai Ikuya
Kitou Kouji
Ohsawa Michitaka
Blum Theodore M.
Hitachi , Ltd.
LandOfFree
Display does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1028876