Display panel driving circuit

Details Display panel driving circuit Display panel driving circuit

1996-11-25

1999-08-24

Chow, Dennis-Doon

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 41, 345 42, 345 61, 345 62, 345 76, 345212, 3151693, G09G 328

Patent

active

059430303

ABSTRACT:
A display panel driving circuit includes a plurality of elementary driver circuits each provided for each one of drive electrodes, an electric power recovery common line, an electric power release common line, first and second coils having one end thereof connected to the electric power recovery common line and the electric power release common line, respectively, and a capacitor having one end connected in common to the other end of the first and second coils. Each of the elementary driver circuits includes a first switch on-off controlled to recover a recovery current from a corresponding drive electrode to an electric power recovery line, a second switch on-off controlled to selectively connect the corresponding drive electrode to a low potential power supply line, a third switch on-off controlled to supplying a recovered electric current from an electric power release line to the corresponding drive electrode, and a fourth on-off controlled to selectively connect a high potential power supply line to the corresponding drive electrode. The electric power recovery common line is connected in common to the electric power recovery line of all the elementary driver circuits, and the electric power release common line is connected in common to the electric power release line of all the elementary driver circuits. The first to fourth switches of each of the elementary driver circuits are so controlled that each of the elementary driver circuits can perform the electric power recovery operation and the electric power release operation simultaneously in parallel to those of the other elementary driver circuits. Thus, the electric power recovery/release can be carried out not only in the display cell sustain discharge driving period but also in the display data writing period.

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