Gate Driver Shift Register Grouping for Stretchable Display PPI
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Solution Overview
Problem
Stretchable display panels experience image distortion and luminance degradation when stretched due to decreased pixel density, as the distance between pixels increases, leading to a decrease in pixels-per-inch (PPI).
Innovation Solution
A gate driver that groups adjacent shift registers into shift register groups and arranges them in a cascade form when the display panel is stretched and in a parallel form when not stretched, maintaining PPI by controlling the output of gate signals through connection control blocks and switches or conductive connection lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the stretchable display panel is stretched to change its size, then the area of the display panel is increased, but the pixel density decreases causing image distortion and luminance degradation
Solution Approach 1:
The gate driver dynamically reconfigures its internal structure between cascade connection mode (when panel is stretched) and parallel connection mode (when panel is not stretched). This dynamic adaptation allows the system to maintain optimal pixel density and prevent image distortion regardless of the panel's physical state, directly resolving the contradiction between panel area expansion and pixel density maintenance.
Solution Approach 2:
The invention changes the connection configuration parameter of the gate driver based on the stretching state of the display panel. By switching between cascade and parallel connections, the system adjusts its operational parameters to compensate for physical changes in the panel, thereby maintaining consistent pixel density and preventing image distortion during area expansion.
2Length of stationary object
If the stretchable display panel is stretched, then the distance between pixels increases, but this causes a decrease in pixels-per-inch (PPI)
Solution Approach 1:
The gate driver employs dynamic reconfiguration between cascade and parallel connection modes based on the stretching state. When the panel is stretched and pixel distance increases, the system switches to cascade mode to maintain appropriate PPI. This dynamic adaptation directly addresses the contradiction by adjusting the driver's operational state in response to physical changes in pixel spacing.
3Area of stationary object
If the stretchable display panel is stretched, then the size of the panel is changed, but image distortion occurs
Solution Approach 1:
The gate driver dynamically switches between cascade connection mode (during stretching) and parallel connection mode (during normal state) to maintain image quality. This dynamic reconfiguration ensures that the timing and sequencing of pixel activation remain appropriate regardless of panel deformation, preventing image distortion while allowing flexible size changes.
Solution Approach 2:
The system proactively switches to cascade connection mode before or during the stretching process to prevent image distortion from occurring. By anticipating the physical change and adjusting the driver configuration in advance, the system counteracts the potential for image distortion before it can manifest, maintaining image stability throughout the deformation process.
4Quantity of substance
If the stretchable display panel is stretched, then the pixel density decreases, but luminance degradation occurs
Solution Approach 1:
The gate driver dynamically reconfigures between cascade and parallel modes in response to stretching-induced pixel density changes. This dynamic adaptation ensures that each pixel receives appropriate driving signals regardless of density variations, preventing luminance degradation that would otherwise result from decreased pixel density during panel expansion.
Data Source
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AI summary
A gate driver includes a plurality of shift registers and a plurality of connection controllers. The shift registers are connected to a plurality of gate lines of a stretchable display panel, respectively. The shift registers are grouped into a plurality of shift register groups. N adjacent shift registers constitute each of the shift register groups, where N is an integer greater than or equal to 2. The connection controllers change a connection structure of the N adjacent shift registers included in the each of the shift register groups according to whether the stretchable display panel is stretched.