US20240397776
2024-11-28
Electricity
H10K59/131
The stretchable display device is designed with a unique structure comprising a stretchable substrate that incorporates multiple island areas, each separated by hinge areas. These island areas house individual display units. A key feature is the wiring part, which connects these display units and is strategically located in the hinge areas to maintain flexibility. An insulating layer, featuring an opening aligned with the hinge area, sits between the stretchable substrate and the display units, providing necessary insulation while allowing for stretchability.
Display devices traditionally include OLEDs, LCDs, and PDPs. OLED displays are particularly notable for their use of organic light-emitting diodes on a substrate. The development of stretchable displays has introduced substrates capable of stretching while maintaining functionality, with organic light-emitting elements applied to these flexible substrates.
The device's insulating layer is composed of both inorganic and organic materials. The inorganic layer includes openings that align with the hinge areas, allowing the wiring to pass through. This design ensures that the wiring part can flexibly connect display units across island areas without compromising electrical integrity. The device also includes a depressed part in the substrate that aligns with these openings, enhancing flexibility.
Each display unit consists of thin film transistors and an organic light-emitting element. These transistors are intricately connected through various electrodes and lines within the wiring part. The arrangement ensures that each pixel in the display unit can function independently while being collectively controlled through shared wiring paths that traverse the hinge areas.
The stretchable substrate may be made from polymers like polyimide or polyethylene. Island areas can take various shapes such as triangles or hexagons, all connected by curved hinge areas to facilitate stretching. The wiring part is designed to traverse these hinge areas, maintaining connectivity between island areas while allowing for movement and flexibility of the overall display.