Title:
【発明の名称】ディスプレイ
Document Type and Number:
Japanese Patent JP2690358
Kind Code:
B2
Abstract:
PURPOSE:To prevent a screen noise from being generated due to a beat by using a switching regulator operated by utilizing a pulse synchronizing with a horizontal synchronizing signal for a deflecting current control circuit and a high voltage stabilizing circuit. CONSTITUTION:A switching regulator 5 controls a power source voltage EB1 supplied to a horizontal output circuit 3 so that amplitude of an output from a deflecting current detecting circuit 4 becomes constant. Also, a switching regulator 9 controls a power source voltage EB2 supplied to a high voltage output circuit 7 so that amplitude of an output from a high voltage detecting circuit 8 becomes constant. According to this constitution, by fetching a horizontal saw tooth wave H.SAW from a horizontal oscillation circuit 1, an inputting it to the regulator 5 and 9, an oscillator is eliminated from the regulator 5 and 9. By constituting the circuit in such a way, only a horizontal deflection frequency exists in a horizontal deflection high voltage circuit, and it can be eliminated that a screen noise is generated due to a beat between two different frequencies (a horizontal deflection frequency and a frequency by an oscillator).
Inventors:
Koji Kido
Ikuya Arai
Ikuya Arai
Application Number:
JP13911089A
Publication Date:
December 10, 1997
Filing Date:
June 02, 1989
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04N3/185; G09G1/00; G09G1/04; G09G1/16; G09G5/12; G09G5/18; H04N3/22; H04N5/04; H04N5/06; (IPC1-7): H04N5/04; G09G5/18; H04N5/06
Domestic Patent References:
| JP62225078A | ||||
| JP210915A | ||||
| JP62109521U |
Attorney, Agent or Firm:
Namiki Akio