Automatic adaptation of the precharge voltage of an...

Details Automatic adaptation of the precharge voltage of an... Automatic adaptation of the precharge voltage of an...

2005-12-06

2011-10-25

Lao, Lun-Yi (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S082000, C345S204000, C315S169300

Reexamination Certificate

active

08044892

ABSTRACT:
A circuit for controlling a matrix display formed of light-emitting diodes, capable of successively selecting lines of the screen and, for each line from a set of selected lines, of selecting columns, the voltage of each selected column settling at an operating voltage. The circuit is capable, before selection of each line from said set of lines, of precharging at least the columns to be selected to a precharge voltage. The circuit includes a device for adjusting the precharge voltage including a measurement circuit capable, on each selection of a line from said set of lines, of measuring the maximum operating voltage from among the operating voltages of the selected columns; a circuit capable of storing the maximum measured operating voltage; and a circuit capable of adjusting the precharge voltage based on the maximum stored operating voltage.

REFERENCES:
patent: 6594606 (2003-07-01), Everitt
patent: 6750840 (2004-06-01), Morita
patent: 2002/0097002 (2002-07-01), Lai et al.
patent: 2003/0184237 (2003-10-01), Togashi et al.
patent: 2004/0017725 (2004-01-01), Mas et al.
patent: 2006/0001613 (2006-01-01), Routley et al.
French Search Report from French Patent Application No. 04/52867, filed Dec. 6, 2004.

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