Row driver for EL panels and the like with transformer coupling

Details Row driver for EL panels and the like with transformer coupling Row driver for EL panels and the like with transformer coupling

1988-12-09

1990-09-04

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151691, 340781, G09G 330

Patent

active

049547526

ABSTRACT:
A simplified row driver switching circuit for display panels and the like, including particularly electroluminescent (EL) panels, as well as plasma panels, using transformer coupling between the power supply and the row electrodes. The circuit limits energy transfer to each row electrode of the EL panel to minimize the effects of destructive arcing caused by inter-electrode shorts. The circuit is energy conservative and eliminates the need for, for example, -160V and +220V power supplies, and provides reduced stress levels for many components through transformer coupling, and all active switches are driven from ground potential. Two row driver circuits are disclosed (FIGS. 4 & 6), the latter, using a split primary coil and double sets of paired switches, allows the row electrodes to be driven to negative, as well as positive, voltages. The primary and secondary windings on the transformer (T.sub.1 of FIGS. 4 & 6) are used to store and transfer energy to the essentially capacitive row electrode load (C.sub.panel) and then back to the power source (V.sub.in), as various associated switches are pulsed "on" and released. The same power supply can be used for both the row driver and the column driver (FIG. 8).

REFERENCES:
patent: 4225807 (1980-09-01), Ise et al.
patent: 4254362 (1981-03-01), Tulleners
patent: 4319164 (1982-03-01), Tulleners
patent: 4595861 (1986-06-01), Simopoulos et al.
patent: 4611150 (1986-09-01), Ball et al.
patent: 4633141 (1986-12-01), Weber
patent: 4707692 (1987-11-01), Higgins et al.

Affiliated with

Also associated with

Rating

Row driver for EL panels and the like with transformer coupling does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Row driver for EL panels and the like with transformer coupling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Row driver for EL panels and the like with transformer coupling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-444214