Flexible Display Screen Integrating Pressure Sensor on Backing Film
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Solution Overview
Problem
Current flexible display technologies require an additional glass substrate for pressure sensors, increasing the thickness and cost of flexible display panels in devices like mobile phones and tablets.
Innovation Solution
A flexible display screen design that integrates a pressure sensor on a backing film, eliminating the need for a separate substrate, with a capacitive pressure sensor structure using a foam dielectric layer and shared ground electrode, and includes a heat dissipation layer and light shielding layer for reduced thickness and cost, along with organic electroluminescent diodes and 3D touch control capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glass substrate is added to form pressure sensors, then pressure sensing functionality is achieved, but the thickness of the flexible display panel increases
Solution Approach 1:
The pressure sensor is integrated directly onto the backing film, merging the pressure sensing function with the existing structural layer. This eliminates the need for a separate glass substrate and achieves thickness reduction while maintaining pressure sensing functionality through the capacitive sensor structure formed by electrodes and dielectric layer.
Solution Approach 2:
The patent uses thin film structures including the backing film, dielectric layer, and electrode layers to construct the pressure sensor. This thin-film approach replaces the bulky glass substrate with flexible, thin materials that maintain the pressure sensing function while significantly reducing the overall thickness of the display panel.
2Reliability
If a glass substrate is added to form pressure sensors, then pressure sensing functionality is achieved, but the weight of the flexible display panel increases
Solution Approach 1:
The pressure sensor is integrated directly onto the backing film, merging the pressure sensing function with the existing structural layer. This eliminates the need for a separate glass substrate and achieves thickness reduction while maintaining pressure sensing functionality through the capacitive sensor structure formed by electrodes and dielectric layer.
Solution Approach 2:
The patent uses thin film structures including the backing film, dielectric layer, and electrode layers to construct the pressure sensor. This thin-film approach replaces the bulky glass substrate with flexible, thin materials that maintain the pressure sensing function while significantly reducing the overall thickness of the display panel.
3Reliability
If a separate substrate is used for pressure sensors, then pressure sensing functionality is achieved, but the manufacturing cost increases
Solution Approach 1:
The pressure sensor is integrated directly onto the backing film, merging the pressure sensing function with the existing structural layer. This eliminates the need for a separate glass substrate and achieves thickness reduction while maintaining pressure sensing functionality through the capacitive sensor structure formed by electrodes and dielectric layer.
Solution Approach 2:
The patent uses thin film structures including the backing film, dielectric layer, and electrode layers to construct the pressure sensor. This thin-film approach replaces the bulky glass substrate with flexible, thin materials that maintain the pressure sensing function while significantly reducing the overall thickness of the display panel.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a lighter, thinner, and more cost-effective flexible display screen that maintains functionality with 3D touch control and efficient heat dissipation, enhancing the flexibility and performance of display devices.
Implementation Method 1
the pressure sensor includes: a first electrode, a dielectric layer, and a second electrode disposed in sequence along a direction away from the substrate with respect to the backing film
Implementation Method 2
a material of the dielectric layer includes a foam
Implementation Method 3
the flexible display screen further includes a heat dissipation layer between the dielectric layer and the second electrode
Implementation Method 4
each of the pixel units including an organic electroluminescent diode
Data Source
AI summary
The present disclosure provides a flexible display screen and a display device. The flexible display screen includes: a substrate; a backing film stacked on a side of the substrate facing away from a light-emitting surface of the flexible display screen; and a pressure sensor stacked on a side of the backing film facing away from the substrate and configured to output a signal related to a force applied on the flexible display screen.