04353062 is referenced by 82 patents and cites 3 patents.

A modulator circuit for a matrix display device, the modulator circuit having pulse width and pulse amplitude control. The current amplitude for a selected picture element (row address-column address) varies during the pulse width of an excitation pulse in correspondence with the number of counting positions of a counting circuit used for determining the pulse width.

A column conductor has an associated column excitation circuit in which a counting circuit for determining the excitation pulse width controls excitation switches which pass selectively currents from current source I.sub.A . . . 64I.sub.A of a current source circuit to the column conductor. The initial setting of the counting circuit determines the excitation pulse width, and the count positions of the counting circuit select the currents to be passed to the column conductor as the counting circuit is stepped by clock pulses to measure the duration of the excitation pulse.

Title
Modulator circuit for a matrix display device
Application Number
6/140406
Publication Number
4353062
Application Date
April 14, 1980
Publication Date
October 5, 1982
Inventor
Henri W Schneider
Eindhoven
NL
Geert Warrink
Eindhoven
NL
Jean H J Lorteije
Eindhoven
NL
Agent
Robert S Smith
Assignee
U S Philips Corporation
NY, US
IPC
G09G 3/22
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