Test circuit and method for display panel and display panel

A test circuit for a display panel, comprising:

• a panel test sub-circuit, comprising a plurality of panel test switch units configured to connect to a plurality of data lines of the display panel, the panel test sub-circuit being configured to control, according to a plurality of received panel test control signals, the panel test switch units to turn on or turn off, to transmit a plurality of panel test signals;
• and
• an array test sub-circuit, comprising a plurality of array test switch units and a plurality of test terminals, the array test switch units being configured to connect to the panel test sub-circuit and the data lines, the array test sub-circuit being configured to control, according to a plurality of received array test control signals, the array test switch units to turn on or turn off, to output short circuit determination signals through the test terminals according to the plurality of panel test signals transmitted by the panel test sub-circuit, the short circuit determination signals being used to determine whether there is a short-circuited data line in the display panel,
• wherein:
• at least one set of the array test switch units are turn on in a test sub-period, and under a condition that the at least one set of the array test switch units are turn on, the panel test signals corresponding to different types of sub-pixels in the display panel change alternately to an effective level:
• the sub-pixels comprise a plurality of first sub-pixels, a plurality of second sub-pixels and a plurality of third sub-pixels;
• a set of the array test switch units are turn on in the test sub-period;
• a plurality of sets of the array test switch units are turn on successively in a test period and the test period comprises two or more test sub-periods;
• and
• under a condition that the set of the array test switch units are turned on, a panel test signal corresponding to the first sub-pixels, a panel test signal corresponding to the second sub-pixels, and a panel test signal corresponding to the third sub-pixels change alternately to the effective level.