Stretchable Display Device Luminance Compensation
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Solution Overview
Problem
Stretchable display devices face challenges in maintaining uniform luminance and image quality when extended, due to luminance irregularities caused by stretching, which existing technologies fail to adequately address.
Innovation Solution
A stretchable display device design featuring a lower flexible substrate with alternating first and second rigid substrates in the display area, where light emitting elements and driving transistors are disposed on different substrates, and a compensation transistor and capacitor are used to compensate for changes in driving current as the device is stretched, maintaining uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light emitting elements and driving transistors are disposed on the same substrate, then device structure is simple, but luminance irregularity occurs when the device is stretched
Solution Approach 1:
The patent divides the substrate into multiple separate substrates: a first substrate for light emitting elements, a second substrate for driving transistors, and a third substrate for compensation circuits. This segmentation allows each component to be independently positioned and compensated, resolving the luminance uniformity issue while maintaining manageable structural complexity
Solution Approach 2:
The patent introduces compensation circuits on a separate third substrate that act as intermediaries to detect and correct luminance variations caused by stretching. These compensation circuits measure the actual luminance output and adjust driving signals accordingly, enabling uniform luminance across the display even when stretched
2Illumination intensity
If compensation circuits are added to maintain luminance uniformity, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
The patent implements compensation circuits only in specific regions where luminance variation is detected, rather than uniformly across the entire display. The compensation transistors and capacitors are strategically positioned to address local stretching effects, maintaining luminance uniformity while minimizing the overall complexity of the device structure
Solution Approach 2:
The compensation circuits are designed to automatically detect and correct luminance variations without external intervention. The compensation transistors and capacitors form self-regulating circuits that adjust driving currents based on real-time stretching conditions, reducing the need for complex external control systems
Data Source
AI summary
One or more embodiments of the present disclosure provides a stretchable display device. The stretchable display device includes a lower substrate including a display area and a non-display area, a plurality of first substrates and a plurality of second substrates disposed in the display area, a plurality of light emitting elements disposed on each of the plurality of first substrates, a switching transistor and a driving transistor disposed on each of the plurality of second substrates, in which the switching transistor may output a data signal to the driving transistor in accordance with a scan signal and the driving transistor may output a driving current to the light emitting element in accordance with the data signal.