Multiplexed control active matrix display screen
First Claim
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1. Multiplexed control active matrix display screen comprising:
- a first plate comprising a first transparent substrate supporting an array of electrodes controlled by an array of transistors, each transistor comprising a source, a drain and a first gate;
a first group of addressing conductive strips arranged in column form;
a second group of addressing conductive strips arranged in row form;
the drain and source of each transistor being respectively connected to an addressing column and to an electrode, the first gate being connected to an addressing row,control means comprising control circuits for applying appropriate voltages to the addressing conductive strips in column form and the addressing conductive strips in row form,a second plate comprising a second transparent substrate coated with a counterelectrode,said screen being characterized in that;
a) each transistor has a second gate positioned facing the first gate,b) all the second gates of the transistors corresponding to one addressing conductive strip out of N are electrically interconnected, in which N is an integer at least equal to 2 (N groups of second gates being formed in this way),c) consecutive addressing conductive strips (columns or rows) are electrically regrouped N by N, N strips of a first group being connected to one addressing circuit, a number of addressing circuits then being equal to a number of addressing conductive strips (columns or rows) divided by N,d) the control means also comprise N supplementary control circuits for applying to each of the N groups of second gates appropriate voltages in agreement with signals applied to the addressing conductive strips.
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Abstract
A multiplex control active matrix display screen including a first transparent substrate supporting an array of electrodes controlled by an array of transistors. Each transistor has two control gates. The second gates are interconnected along an addressing row or column. The rows and columns are interconnected in groups of N. The transistors of a column or row are then controlled by multiplexed three control signals.
11 Citations
6 Claims
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1. Multiplexed control active matrix display screen comprising:
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a first plate comprising a first transparent substrate supporting an array of electrodes controlled by an array of transistors, each transistor comprising a source, a drain and a first gate;
a first group of addressing conductive strips arranged in column form;
a second group of addressing conductive strips arranged in row form;
the drain and source of each transistor being respectively connected to an addressing column and to an electrode, the first gate being connected to an addressing row,control means comprising control circuits for applying appropriate voltages to the addressing conductive strips in column form and the addressing conductive strips in row form, a second plate comprising a second transparent substrate coated with a counterelectrode, said screen being characterized in that; a) each transistor has a second gate positioned facing the first gate, b) all the second gates of the transistors corresponding to one addressing conductive strip out of N are electrically interconnected, in which N is an integer at least equal to 2 (N groups of second gates being formed in this way), c) consecutive addressing conductive strips (columns or rows) are electrically regrouped N by N, N strips of a first group being connected to one addressing circuit, a number of addressing circuits then being equal to a number of addressing conductive strips (columns or rows) divided by N, d) the control means also comprise N supplementary control circuits for applying to each of the N groups of second gates appropriate voltages in agreement with signals applied to the addressing conductive strips. - View Dependent Claims (2, 3, 4, 5, 6)
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Current AssigneeOrange S.A., Socitete Sagem
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Original AssigneeOrange S.A., Societe Sagem
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InventorsDelgrange, Louis, Deffontaines, Christophe, Morin, Fran.cedilla.ois
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Primary Examiner(s)LEE, MICHAEL
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Application NumberUS08/473,227Time in Patent Office881 DaysField of Search345/92, 345/90, 345/103US Class Current345/92CPC Class CodesG02F 1/133512 Light shielding layers, e.g...G02F 1/1368 in which the switching elem...G09G 2300/0814 used for selection purposes...G09G 3/3648 using an active matrix G09G...G09G 3/3659 the addressing of the pixel...
