发明授权
US4954752A Row driver for EL panels and the like with transformer coupling 失效
带有变压器耦合的EL面板等的行驱动器

Row driver for EL panels and the like with transformer coupling
摘要:
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).
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