Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FOCUSING/DEFLECTION VOLTAGE SUPPLY CIRCUIT
Document Type and Number:
Japanese Patent JPS6339277
Kind Code:
A
Abstract:
PURPOSE:To adjust enough a focusing voltage without increasing the consumption of electric power with a relatively simple constitution by providing a saw tooth wave voltage generating part and a focusing voltage adjusting part, altering a mid-point voltage on the secondary side of a power source transformer in the focusing voltage adjusting part and adjusting the DC voltage components of the saw tooth wave voltage. CONSTITUTION:In case of adjusting the focus to each electrostatic focusing.electrostatic deflection type pickup tube, the moving terminal of a variable resistor 16 which forms the focusing voltage adjusting part 18 is moved and controlled. At the same time the mid-point voltage V0 on the secondary side of the power source transformer 11 of a rectifier power source part 10 is made to alter. At this time, in the first voltage output terminals 14 and 15 of the rectifier power source part 10, the DC voltage which is higher than the midpoint voltage V0 by Vv and the DC voltage which is lower than the mid-point voltage V0 by Vv are respectively obtained. Thus the respective DC voltage components of the saw tooth wave voltages Hg, Hg' and Vg, Vg' obtained from a horizontal, focusing/deflection voltage generation parts 20a and a vertical focusing/deflection voltage generation part 21a, namely the focusing voltage, can be adjusted according to the control of the variable resistor 16 which forms the focusing voltage adjusting part 18.

Inventors:
MORIOKA YOSHIHIRO
Application Number:
JP18396286A
Publication Date:
February 19, 1988
Filing Date:
August 05, 1986
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SONY CORP
International Classes:
H04N3/16; H04N3/26; (IPC1-7): H04N3/16; H04N3/26