Flexible Display Image Flip Control via Curvature Detection
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Solution Overview
Problem
Existing display technologies face challenges in ensuring reliability, particularly for flexible display devices, as they incur high manufacturing costs and increased power consumption due to complex control algorithms, and struggle with noise interference from external light sources, which affects the detection of minute refractive index changes.
Innovation Solution
A display device with a flexible substrate, a display unit, and a displacement sensor that detects curvature, coupled with a control unit performing image flip control based on the curve amount and position, using a lookup table to determine advisability, and employing transparent electrodes to monitor resistance changes for accurate bend detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex feedback control algorithms are used to ensure display reliability, then display reliability is improved, but manufacturing cost increases and power consumption increases
Solution Approach 1:
The patent extracts and eliminates complex feedback control algorithms from the display system, replacing them with a simple image flip control mechanism. Instead of using multiple algorithms to control gate signals, source signals, and lighting periods, the system now only needs to detect curvature and flip the image accordingly, dramatically reducing device complexity while maintaining reliability
Solution Approach 2:
Rather than trying to prevent curvature through complex control, the patent inverts the approach by accepting curvature as inevitable and simply flipping the image to compensate. This inversion transforms a complex control problem into a simple display transformation, reducing both manufacturing cost and power consumption
2Measurement precision
If photodetector is used to detect refractive index changes, then deformation detection is enabled, but detection precision decreases due to noise from external light
Solution Approach 1:
The patent converts the harmful effect of external light into a beneficial one by using a displacement sensor that detects curvature through a different physical mechanism. Instead of relying on refractive index changes that are susceptible to light noise, the system uses a sensor that can accurately detect curvature regardless of external light conditions, thereby eliminating the detection precision problem
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
This solution ensures reliable display performance by adjusting image orientation during curvature, maintaining visibility and image quality, while reducing power consumption and manufacturing costs, and effectively mitigating noise interference from external light.
Implementation Method 1
The displacement sensor may include a pair of transparent electrodes formed of ITO or IZO and be configured to detect the curved state of the substrate based on a change in resistance value between the pair of transparent electrodes
Data Source
AI summary
A display device includes flexible substrate, a display unit including multiple light-emitting elements arranged at the substrate and configured to display an image according to an image signal, a displacement sensor provided to at least one of a front surface and a back surface of the substrate and configured to detect a curved state of the substrate, and a control unit configured to perform a flip control with respect to the image displayed in the display unit when a curve of the substrate is detected by the displacement sensor.