Disclosed are a test device and a test method thereof. The test device includes a first electrode, an electron transport unit, a charge generation layer, a hole transport unit and a second electrode which are stacked; the charge generation layer includes an N-type doped layer and a P-type doped layer which is stacked on the N-type doped layer, the N-type doped layer is adjacent to the electron transport unit, and the P-type doped layer is adjacent to the hole transport unit.

An electronic panel includes a base substrate having a first area, a second area adjacent to the first area, and a third area adjacent to the second area, a plurality of pixels in the second area, a plurality of pixel signal lines in the third area and connected to the pixels, a crack detecting pattern spaced apart from the pixels and in the first area, a first line spaced apart from the pixel signal lines, in the third area, and connected to a portion of the crack detecting pattern, and a second line spaced apart from the pixel signal lines, in the third area, connected to another portion of the crack detecting pattern, and spaced apart from the first line. The crack detecting pattern has a line-symmetrical shape with respect to a symmetry axis passing through a center of the first area.

Provided are a display panel, a control method thereof, and a display device. The control method includes: acquiring a correspondence between temperature and voltage information of a first cathode of a first sub-pixel among a plurality of first sub-pixels, a correspondence between temperature and information about a voltage difference between an auxiliary electrode and the first cathode, and current temperature information of the display panel; and determining voltage adjustment information of the first cathode and the auxiliary electrode according to the current temperature information, the correspondence between temperature and the voltage information of the first cathode, and the correspondence between temperature and the information about the voltage difference between the auxiliary electrode and the first cathode so as to adjust the voltage difference between the first cathode and the auxiliary electrode so that a display color purity of the first sub-pixels meets a preset requirement.

A display device includes: an array of pixels disposed on a display area; a connection pad disposed on a pad area; a transmission line electrically coupled with the connection pad; and a conductive dummy pattern disposed under the transmission line. A part of the conductive dummy pattern overlaps the transmission line in a plan view. The transmission line transmits a driving signal or a power signal to the array of pixels. The connection pad includes a pad conductive layer electrically coupled with the transmission line, and a passivation layer disposed on the pad conductive layer. The passivation layer covers at least a side surface of the pad conductive layer and defines an opening overlapping the conductive dummy pattern and the transmission line in the plan view.

An electronic device of the technology includes: a plurality of first wiring patterns that are electrically coupled to each other partially, and each extend in a first direction; an organic insulating layer that is provided on the first wiring patterns; and a second wiring pattern that is provided on the organic insulating layer.

An organic light emitting display device includes a substrate which is divided into an active area and a non-active area. An adhesive film and an encapsulation substrate are disposed above the substrate, and a dam is disposed in the non-active area between the substrate and the encapsulation substrate. The dam includes a polymer light emitting material that is transparent when irradiated with visible light but emits light when irradiated with ultraviolet light. Therefore, external appearance of the dam can be inspected and performance of the dam can be evaluated using ultraviolet rays.

An organic light-emitting diode (OLED) display panel, a manufacturing method thereof, and an OLED display device are provided. The OLED display panel disposes an organic functional layer under an encapsulation layer and makes the organic functional layer undergo visible changes when in contact with water and oxygen. Therefore, encapsulation effect can be tested by merely knowing the changes of the organic functional layer, and a test time is shorter. Meanwhile, a minimum distance between boundaries of the organic functional layer and the encapsulation layer is greater than a coating precision accuracy of the encapsulation layer, thereby ensuring the encapsulation effect.

The disclosure provides a display panel and a display device, including a display cell. The display cell includes: a plurality of display pins and a plurality of cell test pins, which are arranged in a bonding region of the display cell; and a chip on film bonded to a side facing away from a display surface of the display cell. An orthographic projection of the chip on film on the display cell completely covers the display pins and the cell test pins.

A display device including: a substrate; a display element layer disposed on the substrate; a dam disposed around the display element layer; a plurality of patterns disposed between the dam and the display element layer, and a planarization layer disposed on the display element layer and the patterns, wherein the patterns have a hydrophile-lipophile balance value different from a hydrophile-lipophile balance value of the planarization layer.

An array substrate, a manufacturing method thereof and a display panel. After a metal layer is formed on a substrate, a protective layer is formed on the metal layer.