A thin film transistor, a controlling method thereof, an array substrate and a display device. The thin film transistor includes: a substrate; and a gate electrode, an active layer, a source and a drain on the substrate. The source comprises two source electrodes electrically connected with each other; the drain comprises two drain electrodes electrically connected with each other, and the two drain electrodes are between the two source electrodes; and the active layer comprises primary channels between adjacent source electrodes and drain electrodes and a secondary channel between the two drain electrodes.

A control switch of a driving circuit (200), an array substrate (100), and a display panel (400) are disclosed. The control switch includes a thin film transistor (220). In the thin film transistor (220), the electrode (230) includes at least two source branches (231), and the drain electrode (240) includes at least one drain branch (241). Each source branch (231) directly connected to the source lead (210) is a first source branch (232). Each drain branch (241) adjacent to the first source branch (232) is a first drain branch (242). An extension of each of the at least one source lead (210) is located between the respective first drain branch (241) and the source trunk (234).

A liquid crystal display panel includes: a plurality of pixels arranged in a matrix; a plurality of pixel electrodes and a plurality of transistors provided in each of the plurality of pixels; and a scanning line connected to the plurality of transistors in each of the plurality of pixels arranged in a first direction. In each of the plurality of pixels, the plurality of pixel electrodes and the plurality of transistors are arranged in the first direction.

A display device includes a pixel electrode, a signal line, a pixel electrode, and a blocking portion. The signal line is configured to transmit a signal to the pixel electrode. The pixel electrode connecting line is disposed a predefined distance apart from the signal line and connected to the pixel electrode. The blocking portion is disposed between a connecting portion of the pixel electrode connected to the pixel electrode connecting line and the signal line to block an electric field between the connection portion and the signal line.

A display device including: a first substrate; a first electrode layer disposed on an edge of the first substrate; a second electrode layer disposed on the first electrode layer; the first electrode layer and the second electrode layer defining a space in between; a metal sludge disposed in the space; and a connection electrode configured to cover a side surface of the first substrate, and disposed in the space to contact the first electrode layer, the second electrode layer, and the metal sludge.

A light emitting display device can include a display panel configured to display an image; a driver configured to drive the display panel; a controller configured to control the driver; and a defect sensing circuit configured to sense a current through a driving voltage line transmitting a driving voltage for driving of the display panel, and output a sensing value based on the current for determining whether an element in a subpixel of the display panel is defective.

A thin film transistor is disclosed, comprising a first, second and third electrode. The first and second electrodes are arranged in a same layer and insulated from each other. The third electrode is arranged below and insulated from the first and second electrodes. The first electrode comprises at least one first conducting part. The second electrode comprises second conducting parts, each of which is arranged adjacent with each first conducting part. The third electrode is provided with an opening part at least partially overlapping with the first or second conducting part. If the first or second conducting part is subject to a channel defect due to short circuit, the first or second conducting part is cut off at an overlapping position with the opening part, to repair the channel defect without affecting the third electrode. A GOA circuit, a display substrate and a display device are further disclosed.

The present disclosure discloses an array substrate comprising: a substrate; a gate electrode; a gate insulating layer formed on one side of the substrate facing the gate electrode, the gate insulating layer covering the gate electrode; an active layer formed on one side of the gate insulating layer away from the gate electrode and made of an indium gallium zinc tin oxide material; an ohmic contact layer formed on one side of the active layer away from the gate insulating layer and made of a conductive indium gallium zinc oxide material, the ohmic contact layer covering both ends of the active layer; and a source electrode and a drain electrode formed on one side of the ohmic contact layer away from the active layer, the source electrode and the drain electrode being electrically connected to both ends of the active layer by the ohmic contact layer, respectively.

A display device including: a first substrate; a first electrode layer disposed on an edge of the first substrate; a second electrode layer disposed on the first electrode layer; the first electrode layer and the second electrode layer defining a space in between; a metal sludge disposed in the space; and a connection electrode configured to cover a side surface of the first substrate, and disposed in the space to contact the first electrode layer, the second electrode layer, and the metal sludge.

An array substrate according to the present invention is a TFT substrate including a pixel TFT and a drive TFT on a substrate, where the pixel TFT includes a first source electrode, a first drain electrode, and an amorphous silicon layer, and the drive TFT includes a third oxide semiconductor layer provided on a gate insulating film while overlapping a second gate electrode in plan view, and a second source electrode and a second drain electrode overlapping the third oxide semiconductor layer in plan view, with a third separation portion separating the second source electrode and the second drain electrode from each other.