Field emission display is a relative novel flat plate display. It is a promising technology as well as liquid crystal display

plasma display panel

OELD. The large-screen printing FED developed with indepen-dent intellectual property rights used particular low-cost

large-scale

low work function material and cathode slurry. Different from FED of other types

large-scale printing FED is with low cost

simple technic

and using the materials with low work function

thus it can reduce the emitting voltage

simplify the driving circuit. At present

we have developed 25 inches large-screen printing color field emission display

topping in China. In the year before last

we successfully developed a kind of driving system that realized displaying video on FED panel. The system used special image processing technology. So far

the driving system has been applied to the 640×480 FED panel and reached good result. The principle of low work function printable field emission display system was presented including the transform and processing of digital video image

the transmission of video data

the interface circuit

the gray-shade of column driving and the row driving technologies

as well as

FPGA control technology. In order to improve display result of the printable field emission display

the luminance non-uniformity correction me-thod

gamma correction method and automatic power control method are proposed by theoretical analyzing and practical certificating. Image processing method is used into the driving circuit and image luminance uniformity and gray-scale reproduction quality are improved

the sample power consume is also reduced. At present

the technology has been used in the 25 inch color low work function printable FED sample fabricated with the capacity for image processing in our lab. It can display color video images and the obtained brightness is about 400 cd/m

2

contrast ratio 1000:1 and 256 circuit gray scales.