In the prior art, a primary touch-control sense structure of an in-cell touch display screen is located on the Color Film (CF) substrate side, and a signal input and a signal output are both implemented by the Thin Film Transistor (TFT) substrate side and a Flexible Printed Circuit (FPC) adhered therewith. Conduction terminals (pads, also referred to conductive pads) arranged respectively at corresponding locations on the CF substrate side and the TFT substrate side are bonded by a frame adhesive mixed with gold balls, where the gold balls are configured to enable two conduction terminals located respectively at the CF substrate side and the TFT substrate side to be electrically connected with each other, so that an in-cell touch structure at the CF substrate side can be electrically connected with the TFT substrate side through the conduction terminals and the gold balls in the frame adhesive.
At present, in-cell touch display screens produced by various screen manufacturers generally may suffer from the problem of defective products, the majority of which may occur as a result of Touch Plane (TP) broken lines arising because the conduction terminals at the CF substrate side and the TFT substrate side are poorly connected. There may be numerous factors resulting in poor conductions between the conduction terminals in practical production, for example, a too small size of a gold ball, a too low density at which the gold balls are distributed, a poor condition under which the frame adhesive is applied, a remaining color-resist of the frame adhesive, etc.; and moreover there is a bridge structure of a longitudinally traveling line in a touch plane viewable area, so the phenomenon of a poor conduction may also occur at the bridge. Consequently there may be some probability of a TP broken line occurring in the in-cell touch display apparatus. For the in-cell touch display apparatus, the entire in-cell touch display apparatus has to be rejected even if a single TP traveling line therein is broken.