Identifiable element, display device, method of manufacturing the same, and method of forming a display pattern

An identifiable element, comprising:

• a bistable layer;
• an electrode layer;
• a conductive transparent layer, wherein the electrode layer and the conductive transparent layer are disposed at opposite sides of the bistable layer;
• and
• a light-trigger electric change layer disposed between the bistable layer and the conductive transparent layer.

A method of forming a display pattern, comprising:

• providing or receiving a display layer, the display layer comprising:
• a bistable layer;
• an electrode layer;
• a conductive transparent layer, wherein the electrode layer and the conductive transparent layer are disposed at opposite sides of the bistable layer;
• and
• a light-trigger electric change layer disposed between the bistable layer and the conductive transparent layer;
• and
• providing a voltage bias across the electrode layer and the conductive transparent layer, and allowing a light to illuminate a portion of the light-trigger electric change layer through the conductive transparent layer, such that a display status of a region of the bistable layer corresponding to the portion of the light-trigger electric change layer is changed, thereby forming a display pattern in the display layer.

A display device, comprising:

• a first conductive transparent layer;
• a second conductive transparent layer opposite to the first conductive transparent layer;
• a bistable layer disposed between the first conductive transparent layer and the second conductive transparent layer;
• and
• a photodiode structure layer disposed between the bistable layer and the second conductive transparent layer, wherein the photodiode structure layer is electrically connected to the bistable layer.