Low voltage phosphor with film electron emitters display device
A flat panel display including: a film electron emitting cathode; and, an anode including: a plurality of pixels, a plurality of TFT circuits, each being associated with a corresponding one of the circuits; and a conductive frame laterally separating the pixels and substantially isolating their respective electric fields.
1. A flat panel display comprising:
a cathode of film emitters; and
an anode comprising:
a plurality of pixels;
a plurality of TFT circuits, each being associated with a corresponding one of the pixels, and applying a known voltage to said corresponding pixel;
a conductive frame laterally separating the pixels and substantially isolating their respective electric fields, said conductive frame being in the same plane as the pixels;
means for applying said known voltage to said plurality of TFT circuits;
a plurality of second transistor circuits connected to said conductive frame;
means for applying a voltage proportional to said known voltage to said transistor circuits, said second transistor circuits applying said proportional voltage to said conductive frame; and
a row driver associated with each of said plurality of TFT and said plurality of second transistor circuits, said row driver applying a row voltage for selecting selected ones of said plurality of film emitters organized in a row, wherein said row voltage is greater than said known voltage.
2. The display of claim 1 , further comprising a conductive grid interposed between the cathode and anode.
3. The display of claim 1 , wherein the pixels, TFT circuits and conductive frame are formed on a first substrate.
4. The display of claim 3 , further comprising a plurality of column conductors electrically coupled to the pixels.
5. The display of claim 4 , wherein the pixels, TFT circuits and column conductors are on the substrate, and further comprising a passivating layer over the pixels, TFT circuits and column conductors.
6. The display of claim 5 , wherein the conductive frame is on the passivating layer.
7. The display of claim 6 , wherein the conductive frame comprises a first plurality of substantially parallel conductors.
8. The display of claim 7 , wherein the conductive frame comprises a second plurality of substantially parallel conductors, and the first plurality of conductors is substantially perpendicular to the second plurality of conductors.
9. The display of claim 1 , wherein the conductive frame comprises a plurality of conductors arranged in a matrix having vertical conductors and horizontal conductors, respectively.
10. The display of claim 9 , wherein the conductive frame bounds each pixel by the intersection of a vertical conductor and a horizontal conductor.
11. The display of claim 9 , wherein the horizontal conductors and vertical conductors are separate electric circuits.
12. The display of claim 11 , wherein said voltage applied to said conductive frame is applied to one or more horizontal conductors of said conductive frame independent of said voltage applied to one or more vertical conductors of said conductive frame.
13. The display of claim 9 , wherein the horizontal and vertical conductors are electrically interconnected.
14. The display of claim 1 , wherein the conductive frame is a metal layer above a TFT passivation layer.
15. The display of claim 1 , wherein the voltage applied to the conductive frame prevents mutual electromagnetic field effects on neighboring pixels.
16. The display of claim 1 , wherein the voltage applied to the control frame operates to activate one pixel high while a neighboring pixel actives low.
17. The display of claim 1 , wherein the film emitters are between 10 to 17 microns in thickness.
18. A flat panel display comprising:
a cathode of film emitters;
an anode, oppositely opposed to said cathode, comprising:
a plurality of pixels each including at least one phosphor, and
a TFT circuit for receiving and applying a known voltage to a corresponding one of said pixels; and
a conductive frame surrounding a corresponding pixel, said conductive frame being in the same plane as the pixels;
a second TFT circuit coupled to said conductive frame receiving said known voltage and applying a voltage proportional to the received voltage to said conductive frame; and
a row driver associated with said TFT and said second transistor circuits, said row driver applying a row voltage for selecting selected ones of said plurality of film emitters organized in a row, wherein said row voltage is greater than said known voltage.
19. The display of claim 18 , wherein said voltage applied to said conductive frame is applied to a corresponding row and column line that forms a matrix.