Patent ID: 7796156

Claim:
An apparatus for testing an organic electroluminescent display panel, applicable to testing a pixel circuit in the organic electroluminescent display panel before an organic electroluminescent material is formed on the organic electroluminescent display panel, wherein the organic electroluminescent display panel comprises a plurality of data lines, a plurality of scan lines and a pixel circuit coupling one of the data lines and one of the scan lines, and the pixel circuit comprises a switching transistor, a drive transistor and a storage capacitor, the apparatus comprising: a gate de-multiplexer, for determining to send a gate testing voltage to one of the scan lines and the pixel circuit according to a gate test signal; a source de-multiplexer, for determining to send a source testing voltage to one of the data lines and the pixel circuit according to a source test signal; and a detecting control circuit, for generating the gate test signal and the source test signal to the gate de-multiplexer and the source de-multiplexer respectively according to a position coordinate of the pixel circuit in the organic electroluminescent display panel, and recording an output voltage value of the pixel circuit as the reference to determine whether or not the pixel circuit is normal, wherein column and row coordinate positions of the pixel are recorded when the output voltage value of the pixel circuit is smaller than a reference voltage.