Emissive Display Driver Layout for Narrow Non-Display Borders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing emissive display devices have a significant non-display area that is not utilized efficiently, leading to increased size and complexity.
Innovation Solution
The design includes a driver configuration with multiple signal stages disposed in a non-display area, where input signal lines are shared between adjacent drivers, reducing the width of the non-display area by using a symmetric arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate input signal lines are provided to each driver in the non-display area, then signal transmission reliability is improved, but the width of the non-display area increases
Solution Approach 1:
Adjacent drivers in the non-display area share common input signal lines (ELVDD, ELVSS, VGH, VGL) instead of each driver having dedicated signal lines. This merging of signal lines reduces the total width of the non-display area while maintaining reliable signal transmission to all drivers through the shared lines.
Solution Approach 2:
The input signal lines serve multiple drivers simultaneously, making them multi-functional. For example, a single ELVDD line provides power to multiple emission control signal generators and scan signal generators, reducing the overall number of signal lines required and minimizing the non-display area width.
2Adaptability or versatility
If multiple signal lines are provided to each pixel, then pixel functionality is improved, but the driver area complexity increases
Solution Approach 1:
The driver area is segmented into multiple signal stages (emission control signal generators and scan signal generators) that are disposed in one row within the non-display area. Each stage processes specific signals, and the segmentation allows for organized, modular signal distribution to pixels without increasing overall complexity.
Solution Approach 2:
Multiple signal lines are arranged in a double-layer structure, utilizing vertical stacking in the cross-sectional direction. This dimensional arrangement allows multiple signal lines to be packed into a smaller horizontal space, reducing driver area complexity while maintaining full pixel functionality.
3Area of stationary object
If emission signal stages are arranged in a compact row, then non-display area width is reduced, but signal line routing complexity increases
Solution Approach 1:
Signal lines are routed using a double-layer structure where clock signal lines and low voltage wires are positioned at different vertical levels. This multi-level routing approach allows compact horizontal arrangement of emission signal stages while managing signal line connections without excessive crossing or interference.
Solution Approach 2:
The input signal lines act as intermediaries that distribute signals to multiple emission signal stages through a standardized interface. This intermediary approach simplifies routing by providing a common signal distribution network that reduces the complexity of direct point-to-point connections between signal sources and all drivers.
Data Source
AI summary
An emissive display device includes a display area which includes a plurality of pixels, and a driver disposed at a side of the display area, where the driver includes at least two emission signal stages disposed in one row, and an input signal line connected to the emission signal stages, and the at least two emission signal stages are connected to the same input signal line.