PM (Passive Matrix) driver demands high quality PLEDs (Polymer Light Emitting Diodes). Each pixel should have perfect diode characteristic

with rectification ratio over 10

4

or else the application of such new type of display will be hampered by crosstalk. For diminishing D.Braun’s crosstalk

[1]

PM driver must break off the relation between selected pixels and idle pixels when driving selected pixels

so reverse voltage (V

DD

-V

EE

) is necessary to apply to idle rows and (columns) when row was scaned

thus AC-PM driver is formed. However

it was found that the leakage of a pixel can cause PLED screen to produce two sorts of crosstalks

and the leaking pixel has no diode characteristic

but has low reverse resistance. During idle time of row scan

the leaking pixel shorts V

DD

and V

EE

in IC

produces considerable leaking current which forms abnormal voltage drop on resistance net distributing in display screen and driver IC

thus previous voltage on idle rows and columns is changed

and bias status of idle pixels on them is changed to forward bias

leading to (emission) and forming new type of crosstalk. Such typical crosstalk is expressed two lighting lines: one is column crosstalk

caused by high voltage on ITO anode instead of low V

EE

which represents brightness distributing relevant to ITO resistance and metal line resistance; another is row crosstalk

caused by low voltage on metal cathode instead of high V

DD

accompanying with selected pixels in eyes. Based on experiment test and phenomenon inspection

discusses that the coincidence reason of row crosstalk and column crosstalk from the low rectification ratio pixel

depicts its influenced rules in the form of miniature. Finally obtains vital consequence resulting in circuit which can be probed

and submits the possibility of lessen the crosstalk

especially the idea from IC re-designing aspects which can relieve crosstalk occurred in products.