Patent ID: 7659744

Claim:
A testing circuit of an LCD apparatus, comprising: a substrate; a plurality of pixel cells on said substrate wherein each pixel cell contains n subpixels; a plurality of signal paths on said substrate coupling with said subpixels; and n shorting bars on said substrate wherein the n shorting bars connect to the (n×m+1)th, (n×m+2)th, (n×m+3)th . . . , (n×m+n)th signal path where n is an odd integer and m is a positive integer or zero; wherein a plurality of testing signals is applied to each of said shorting bars respectively while a pixel cell testing is executed; wherein said plurality of testing signals is sent into said n shorting bars corresponding to a same color of said n subpixels respectively, for verifying a primary color emitted from correseponding said pixel cell; said n shorting bars divided into an odd numbered group and even numbered group, for screening shorting defects between any two neighboring regions of said plurality of signal paths by inputting said plurality of testing signals into each of said even and odd numbered groups of n shorting bars.