Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-02-27
1989-02-07
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307110, 320 1, 363 60, G02F 113, G06F 314, H02M 725
Patent
active
048027391
ABSTRACT:
A liquid crystal display control device, in accordance with the present invention, for supplying a voltage signal to drive a liquid crystal display unit comprises a boosting circuit, and a segment signal circuit and/or a common signal circuit. The boosting circuit includes a dc power supply first capacitor connected between a plurality of first group switches and to be connected in parallel to said dc power supply when the first group switches are operated, a plurality of second group switches, second boosting capacitor connected between the other polarity of the dc power supply and one end of the other switch of the second group switches. One of the second group switches is connected between one polarity of the power supply and one end of the first capacitor. A third electronic switching means is connected to the boosting circuit in parallel to the second capacitor for discharging the voltage charged in the second capacitor.
Therefore, a voltage signal having a predetermined amplitude and polarity for driving the LCD display unit is charged in the second capacitor when the first and second switches are selectively operated and it is discharged when a power interruption occurs.
REFERENCES:
patent: 3599144 (1971-08-01), Dressayre
patent: 3868674 (1975-02-01), Lorteije
patent: 3961840 (1976-06-01), Morokawa et al.
patent: 4050064 (1977-09-01), Hashimoto et al.
patent: 4196432 (1980-04-01), Chihara
patent: 4636930 (1987-01-01), Bingham et al.
patent: 4712876 (1987-12-01), Umeda et al.
B. Miller-"New Converter Sidesteps Second Power", pp. 48-49-Canadian Electronics Engineering-vol. 24, No. 5-1980.
Duong Tai Van
Kabushiki Kaisha Toshiba
Miller Stanley D.
LandOfFree
Liquid crystal display control device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display control device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1081480