Active matrix phosphor cold cathode display

A display comprising:

• a first substrate;
• a plurality of electrically addressable pixels supported on said first substrate, each of said pixels comprising a conductive pad, and a phosphor material deposited on a corresponding conductive pad;
• a conductive frame supported on said first substrate;
• and
• a plurality of cold cathode emitters positioned on said conductive frame;
• a second substrate positioned opposite from said first substrate, wherein said second substrate is transparent and said first and second substrates being sealed at their peripheries to create a cavity therebetween, said cavity being filled with a noble gas;
• and said second substrate including:
• a metal layer (ML) corresponding to one of said addressable pixels;
• and
• nanomaterial deposited on the metal layer;
• means for addressing one of said pixels to cause said cold cathode emitters to emit electrons;
• and
• a switching voltage source:
• applying a voltage to said conductive frame to emit electrons from said cold cathodes positioned on said conductive frame for at least a predetermined time;
• and
• switching a voltage applied to the ML layer from a first value to a second value a predetermined time after applying said voltage to said conductive frame, said predetermined time being determined based on a time to ionize said noble gas, wherein the second value being negative with respect to the voltage applied to a corresponding pixel.

A display comprising:

• a first transparent substrate comprising:
• a plurality of pixel elements arrange in a matrix, each pixel element comprising:
• a conductive pad;
• and
• a phosphor material deposited on a corresponding conductive pad;
• a TFT circuit coupled to a corresponding one of the conductive pad:
• a passivating layer deposited between the pixel elements wherein at least the phosphor layer is exposed through the passivating layer;
• and
• a conductive frame deposited on the passivating layer between the pixel elements, wherein nanomaterial is deposited on the conductive frame;
• a second substrate, positioned opposite to the first substrate, wherein the first and second substrates are sealed along their edges to form a cavity therebetween, the cavity being filled with a noble gas, the second substrate comprising:
• a metal layer corresponding to one of said addressable pixels;
• and
• a nanomaterial deposited on the metal layer:
• a control unit controlling at least one voltage source, to cause said at least one voltage source to:
• selectively apply a voltage to each of the pixel elements, conductive frame and metal layer, wherein the voltage applied to the ML layer being negative with respect to the voltage applied to a corresponding one of the pixel elements a predetermined time after a voltage difference between the voltage applied to the conductive frame and the voltage applied to a corresponding one of the pixel elements exceeds a threshold voltage, said predetermined time being determined based on a time to ionize said noble gas.