Triboelectric device

A triboelectric device comprising:

• a first electrode and a second electrode spaced apart from each other;
• a charging layer on the first electrode;
• a display layer between the first and second electrodes, the display layer being configured to implement an image according to a change in an electric field between the first and second electrodes;
• and
• a charging member configured to be charged with an opposite polarity to a polarity of the charging layer when contacting the charging layer, wherein
• the triboelectric device is configured to implement the image according to the change in the electric field between the first and second electrodes without external power supply when the charging member contacts the charging layer and the charging member and the charging layer are charged with opposite polarities to each other in a contact area of the charging member and the charging layer,
• wherein the second electrode is positioned below the first electrode such that the electric field is formed vertically to the charging layer.