Display panel, detection method and display device

A detection method of a display panel, comprising:

• providing a display panel, wherein the display panel includes:
• a display region and a non-display region surrounding the display region,
• the display region includes a plurality of sub-pixels and at least one first detection line, at least one sub-pixel of the plurality of sub-pixels includes at least one to-be-tested device, and the at least one to-be-tested device includes a first transistor that is electrically connected to two first detection lines of the at least one first detection line, and
• the non-display region includes at least one detection pad serving as a detection terminal, wherein one of the two first detection lines directly connects a source or a source region of an active layer of the first transistor to a detection pad of the at least one detection pad without through any transistor, and the other one of the two first detection lines directly connects a drain or a drain region of the active layer of the same first transistor to another detection pad of the at least one detection pad without through any transistor, and wherein each of the two first detection lines is a line without any transistor;
• determining a current signal on each of the two first detection lines according to a signal on the detection pad or the another detection pad;
• and
• determining whether there are defects in a sub-pixel where the at least one to-be-tested device is located according to the current signal.

A display device, comprising:

• a display panel, the display panel including:
• a display region and a non-display region surrounding the display region, wherein:
• the display region includes a plurality of sub-pixels and at least one first detection line, at least one sub-pixel of the plurality of sub-pixels includes at least one to-be-tested device, and the at least one to-be-tested device includes a first transistor that is electrically connected to two first detection lines of the at least one first detection line, and
• the non-display region includes at least one detection pad serving as a detection terminal,
• wherein one of the two first detection lines directly connects a source or a source region of an active layer of the first transistor to a detection pad of the at least one detection pad without through any transistor, and the other one of the two first detection lines directly connects a drain or a drain region of the active layer of the same first transistor to another detection pad of the at least one detection pad without through any transistor, and wherein each of the two first detection lines is a line without any transistor.