Title:
WAVEFORM GENERATOR FOR CORRECTING DEFLECTION
Document Type and Number:
Japanese Patent JP3905908
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a generator for waveform deflection correcting which is capable of generating a deflection corrected waveform with high stability for a CRT display device.
SOLUTION: A deflection waveform correction signal generator comprises a multiplication circuit U2 for generating a pincushion correction signal ICOR, and a horizontal frequency ramp R is generated by a retrace pulse HZC which is clipped. Each ramp generator Q2, C2 has an output R coupled to an integration circuit U1 and generates a parabolic shaped signal P. The ramp generators Q2, C2 and the ramp integrator U1 are reset by reset pulses of different durations and a signal P having a region of a non-parabolic shape is obtained. The signal P is coupled to an input of the multiplying circuit U2. A control circuit 300 is coupled to the signal P for maintaining a peak amplitude thereof by being coupled to the ramp generator so as to be controllable. A control loop 400 is coupled to the integrator U1 for controlling an integrator input bias current IT, to generate the signals P at predetermined time intervals.
Inventors:
Jiyoung Barreto
Ronald Eugene Farnsler
Walter Truscaro
Ronald Eugene Farnsler
Walter Truscaro
Application Number:
JP2005120515A
Publication Date:
April 18, 2007
Filing Date:
April 19, 2005
Export Citation:
Assignee:
THOMSON CONSUMER ELECTRONICS,INCORPORATED
International Classes:
H04N3/23; G09G1/00; G09G1/04; G09G1/12; G09G1/28; H01J29/70; H04N3/233; H04N5/68; H04N9/28; (IPC1-7): H04N3/23; G09G1/00; G09G1/04; G09G1/12; G09G1/28
Domestic Patent References:
| JP3284061A |
Attorney, Agent or Firm:
Riki Kikoshi
Kozo Aoyama
Kozo Aoyama
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