Pixel Power Supply Unit With Photovoltaic Layer For Flexible Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving uniform brightness, reduced pixel driving lines, and increased resolution, particularly in flexible and foldable structures.
Innovation Solution
A display device with a substrate, pixels, a pixel power supply unit, and a display driver, where the pixel power supply unit includes a photovoltaic layer or coil layer for power generation and distribution, and a substrate with island patterns and bridge patterns for efficient power transmission, reducing the number of lines on the bridge patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of pixel driving lines is reduced, then the complexity of the display device is decreased, but the resolution may be compromised
Solution Approach 1:
The pixel array is divided into multiple blocks, with each block independently driven by a single pixel driving circuit. This segmentation allows the display to achieve high resolution through multiple blocks while maintaining low complexity by using minimal driving lines per block.
Solution Approach 2:
The patent transitions from traditional planar driving to a three-dimensional stacked architecture where pixel circuits are vertically integrated above the display panel. This dimensional change enables multiple pixel blocks to share common driving lines, reducing the total number of lines required while maintaining high resolution.
2Adaptability or versatility
If flexible and foldable structures are implemented, then the adaptability of the display device is improved, but line disconnection during elongation or contraction occurs
Solution Approach 1:
The pixel driving circuits are designed with flexible connections and stress-compensation structures that dynamically adapt to mechanical deformation. The circuit layout and connection methods are optimized to maintain electrical continuity during bending, stretching, and folding operations.
Solution Approach 2:
The patent employs flexible substrate materials and thin-film transistor technologies that inherently accommodate mechanical deformation. The pixel circuits are constructed using flexible interconnects and encapsulation layers that prevent line disconnection while enabling the display to be bent, folded, or stretched.
3Use of energy by moving object
If a photovoltaic layer or coil layer is added for power generation, then the energy autonomy is improved, but the device complexity increases
Solution Approach 1:
The pixel driving circuits serve dual functions: they drive the pixel circuits and simultaneously act as power generation elements through integrated photovoltaic layers or coil layers. This multi-functionality enables the display to generate its own power without adding separate power generation modules, thus avoiding increased complexity.
Solution Approach 2:
The power generation functionality is merged with the pixel driving circuit structure. Photovoltaic layers are integrated into the pixel circuit layout, and coil layers are combined with the driving circuit traces, creating a unified structure that performs both driving and power generation functions.
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 enables uniform brightness, reduced line disconnection during elongation or contraction, and increased resolution by efficiently powering pixels through a photovoltaic or coil layer, minimizing line disconnection and maintaining image quality.
Implementation Method 1
the pixel power supply unit may include a photovoltaic layer... the photovoltaic layer may generate power corresponding light emitted thereto from the light source
Implementation Method 2
the coil layer may receive power corresponding to the power source voltage from the wireless supply power transmitter by an electromagnetic induction
Data Source
AI summary
A display device includes: a substrate; a plurality of pixels on the substrate; a pixel power supply unit between the plurality of pixels and the substrate, where the pixel power supply unit generates a power source voltage and supplies the power supply voltage to the plurality of pixels; and a display driver which drives the plurality of pixels.