Patent ID: 8529307

Claim:
A detection circuit in the assembly process of an LCD panel for applying a testing to multiple panel units of a combined substrate, wherein the multiple panel units are divided into at least two panel unit groups, and each of the panel unit groups comprises at least one of the panel units, and the multiple panel units comprise at least a signal line group, and each of the signal line groups comprises a signal line, and the detection circuit comprises: at least a test line group disposed on the combined substrate, and each of the test line groups comprises a test line; multiple control line groups disposed on the combined substrate, and each of the control line groups comprises a control line; a testing pad collection disposed on the combined substrate, and the testing pad collection comprises multiple control signal pad groups and at least a testing signal pad group, wherein each of the control signal pad groups comprises a control signal pad, and each of the testing signal pad groups comprises a testing signal pad; and a switch collection disposed on the combined substrate, and the switch collection comprises at least two control switch groups, and each of the control switch groups comprises at least a control switch, and the control switch comprises a control terminal, an input terminal, and an output terminal, wherein, the control terminal of each of the control switches electrically connects to the corresponding control signal pad through the corresponding control line, and the input terminal of each of the control switches electrically connects to the corresponding testing signal pad through the corresponding test line, and the output terminal of each of the control switches electrically connects to the signal line of the corresponding panel unit; wherein, one of the test lines respectively connects to at least two of the panel units through at least two of the corresponding control switches; the number of the control signal pad groups, the number of the control line groups, and the number of the panel unit groups are consistent and are corresponding one-by-one; each of the control switches is a thin film transistor comprising a gate electrode, a source electrode, and a drain electrode, and the gate electrode electrically connects to the corresponding control signal pad through the corresponding control line, and the source electrode electrically connects to the corresponding testing signal pad through the corresponding test line, and the drain electrode electrically connects to the corresponding signal line.