Display panel and display device with blocking metal wire in control unit

A display device, comprising:

• a display panel, comprising:
• a plurality of pixels, and
• a blocking metal wire,
• wherein:
• a pixel of the plurality of pixels includes a display unit and a control unit driving the display unit, the display unit at least includes a heating element and a phase change material layer over the heating element, and the control unit is disposed under the display unit and over a substrate;
• the heating element includes a first connecting terminal and a second connecting terminal;
• the control unit includes a first signal terminal and a second signal terminal;
• the first signal terminal is electrically connected to a first signal source, the second signal terminal is electrically connected to the first connecting terminal, and the second connecting terminal is electrically connected to a second signal source;
• the control unit includes at least one diode, and the diode includes a diode semiconductor layer including a first electrode contact region, a second electrode contact region and a connecting region between the first electrode contact region and the second electrode contact region;
• the blocking metal wire is disposed on a side of the at least one diode away from the substrate and covers the connecting region in a direction perpendicular to the display panel and is insulated from the connecting region;
• and
• the blocking metal wire is electrically connected to each of the first signal terminal and the first signal source, or the blocking metal wire is electrically connected to each of the second connecting terminal and the second signal source.