Stretchable Pixel Circuit Layout for High-Resolution Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving improved resolution and display quality, particularly in flexible and stretchable formats that can change form.
Innovation Solution
A display device structure with a substrate featuring island portions and bridge portions, including pixel circuits and light-emitting elements, and specific capacitor and transistor configurations to enhance electrical connectivity and control, allowing for flexible and stretchable designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible and stretchable display structures are implemented, then adaptability and form-change capability are improved, but manufacturing precision and structural stability deteriorate
Solution Approach 1:
The substrate is divided into multiple island portions separated by bridge portions, allowing independent movement and deformation of each island while maintaining overall structural integrity. This segmentation enables the display to withstand mechanical stress during stretching and folding without compromising pixel circuit functionality.
Solution Approach 2:
Multiple pixel circuits are integrated within each island portion, with interconnected wiring structures that nest within the limited space of each island. This nested arrangement allows complex circuit functionality to be maintained within the constrained geometry of flexible display elements.
2Measurement precision
If resolution is improved, then display quality is improved, but device complexity increases
Solution Approach 1:
Multiple pixel circuits are combined within each island portion, sharing common wiring structures and control signals. This merging approach allows high-resolution displays to be achieved without proportionally increasing the complexity of individual circuit elements, as islands can be treated as functional units.
Solution Approach 2:
The patent utilizes three-dimensional stacking of conductive layers and interlayer connections to route signals to multiple pixel circuits within each island portion. This vertical dimensionality allows complex wiring patterns to be achieved without increasing planar complexity, enabling high resolution while maintaining manageable circuit design.
Data Source
AI summary
A display device includes a first pixel circuit arranged in each of the plurality of island portions and connected to a first data line, wherein the first pixel circuit includes a first transistor connected between a first driving voltage line and a light-emitting element and configured to control a current supplied to the light-emitting element, a first capacitor connected between a first node connected to a gate of the first transistor, and an initialization voltage line, a second transistor connected between the first node and a second node and including a gate connected to a first gate line, a second capacitor connected between the first data line and the second node, and a third transistor connected between the second node and a third node connected to the light-emitting element, wherein the third transistor includes a gate connected to a second gate line.