Test method for display panel, and test device

A test device for a display panel, the display panel comprising plural pixel regions each comprising a light emitting element connected to a switching circuit, the switching circuit being configured to conduct a voltage at a first terminal of the light emitting element to a second terminal of the switching circuit upon a first terminal of the switching circuit being at an active level;

• a scan circuit connected to plural rows of first scan lines;
• and a sensor circuit connected to plural columns of sensing lines;
• wherein any switching circuit having the first terminal connected to one row of first scan lines and the second terminal connected to one column of sensing lines, and any two switching circuits connected to a same row of first scan lines being connected to different columns of sensing lines,
• the test device comprising:
• a first output circuit configured to output a data signal of a preset test image to the display panel to cause the plural light emitting elements to emit light according to the test image;
• a second output circuit configured to output a starting signal to the scan circuit to cause the scan circuit to output the active level to the plural rows of first scan lines connected thereto, successively, according to a preset timing sequence;
• a receiving circuit configured to receive a signal from the sensor circuit to generate a sensing signal, the sensing signal comprising voltage value information of the first terminal of every light emitting element, the voltage value information being obtained by the sensor circuit receiving voltage information from the plural columns of sensing lines through complying with the preset timing sequence;
• and
• a comparison circuit configured to compare the voltage value information of the first terminal of every light emitting element in the sensing signal with the preset test image to obtain a test result.