Integrated Pressure Sensor for Flexible OLED Displays
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Summary
Problems
Capacitive touch screen panels cannot measure the intensity of touch inputs, limiting their functionality, and integrating a separate pressure sensor increases the thickness of flexible OLED devices, making them less flexible and thicker.
Innovation solutions
Incorporating a pressure sensor into the back-plate of the OLED device, which supports the substrate and measures touch input intensity, eliminating the need for a separate pressure sensor and allowing the OLED device to sense both position and intensity of touch inputs.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a separate pressure sensor is attached to the display device, then the intensity of touch input can be measured, but the thickness of the display device increases
Why choose this principle:
The patent combines the pressure sensor function with the back-plate structure by integrating a lower electrode and elastic member into the back-plate. This merging eliminates the need for a separate pressure sensor layer, thereby maintaining thinness while enabling touch intensity measurement through capacitance changes detected by the integrated sensor components.
Principle concept:
If a separate pressure sensor is attached to the display device, then the intensity of touch input can be measured, but the thickness of the display device increases
Why choose this principle:
The back-plate is designed to serve multiple functions: it provides structural support to prevent warping, and simultaneously functions as a pressure sensor through its integrated lower electrode and elastic member. This multi-functionality allows the same component to both reinforce the display and measure touch intensity, avoiding additional thickness.
Application Domain
Data Source
AI summary:
Incorporating a pressure sensor into the back-plate of the OLED device, which supports the substrate and measures touch input intensity, eliminating the need for a separate pressure sensor and allowing the OLED device to sense both position and intensity of touch inputs.
Abstract
An organic light-emitting display (OLED) device with an integrated pressure sensor is provided. The OLED device includes a substrate, an organic light-emitting element, and a back-plate. The substrate has a thin-film transistor and has flexibility. The organic light-emitting element is connected to the thin-film transistor on the substrate. The back-plate supports the substrate under the substrate and has a pressure sensor configured to measure the intensity of a touch input. The OLED device with an integrated pressure sensor includes a pressure sensor configured to support a substrate and measure the intensity of a touch input, so that a separate pressure sensor attached to the display device in an add-on type touch screen panel can be eliminated.