Display substrate having dummy pixel, display panel, and electronic device

A display substrate, comprising:

• a base substrate;
• and
• a display area and a peripheral area surrounding the display area on the base substrate,
• wherein a dummy pixel unit and a dummy data line are located in the peripheral area;
• wherein the dummy pixel unit comprises a dummy thin film transistor comprising a first electrode and a second electrode, wherein the first electrode is one of a source electrode and a drain electrode and is electrically connected to the dummy data line;
• wherein the second electrode is the other of the source electrode and the drain electrode and comprises a first portion and a second portion separated by a first opening, and the first portion is located between the second portion and the first electrode;
• and
• wherein the dummy pixel unit further comprises a pixel electrode electrically connected to the second portion of the second electrode, and the first portion of the second electrode is electrically isolated from the pixel electrode,
• wherein a pixel unit and a data line are located in the display area, and the pixel unit comprises a thin film transistor comprising a third electrode and a fourth electrode, and wherein the third electrode is one of a source electrode and a drain electrode and is electrically connected to the data line, the fourth electrode is the other of the source electrode and the drain electrode and has no opening, and the pixel unit is configured to display an image, and
• wherein a pattern of an orthographic projection of end portions of the first electrode, the first portion, and the second portion on the base substrate is identical to a pattern of an orthographic projection of end portions of the third electrode and the fourth electrode on the base substrate;
• and wherein, when superimposed upon each other, a pattern of an orthographic projection of the first opening on the base substrate overlaps with a pattern of an orthographic projection of a middle portion of the fourth electrode on the base substrate.