Display Panel Binding Layout for Wider Pad Spacing
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Solution Overview
Problem
The manufacturing of display panels, particularly high PPI OLED and Micro LED displays, faces challenges due to the small spacing required between pads in the binding region, which exceeds the manufacturing capacity of conventional flexible circuit boards, leading to difficulties in ensuring uniform signal distribution and increasing the complexity of the manufacturing process.
Innovation Solution
The display panel design incorporates a first and second binding region, where a first pad transmits a data signal and a selecting signal, and a second pad transmits a power signal, respectively, allowing for reduced pad density and increased spacing between pads, thereby simplifying the manufacturing process and enhancing signal uniformity by providing separate regions for different signal types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pads are provided in a single binding region to supply multiple different signals, then signal distribution is achieved, but pad spacing becomes too small and manufacturing difficulty increases
Solution Approach 1:
The binding region is divided into multiple separate binding regions (first binding region, second binding region, third binding region, fourth binding region), with each region containing pads for specific signal types. This segmentation allows pads to be spaced farther apart while still providing comprehensive signal distribution to the display panel.
2Reliability
If pad density is increased to provide multiple signals, then signal coverage is improved, but manufacturing precision requirements exceed conventional capabilities
Solution Approach 1:
By segmenting the binding region into four distinct regions, each dedicated to specific signal types (data signals, selecting signals, power signals, control signals), the pad density in each region is reduced, allowing conventional manufacturing processes to achieve required precision.
Solution Approach 2:
Each binding region is assigned a specific function and signal type, creating local quality differentiation. This allows each region to be optimized for its specific purpose while maintaining overall signal coverage across the display panel.
3Device complexity
If all signal types are supplied through a single binding region, then device complexity is reduced, but pad spacing becomes insufficient for conventional manufacturing
Solution Approach 1:
The binding region is segmented into four separate regions arranged around the display region, with each region handling specific signal types. This segmentation increases device complexity in terms of structure but resolves the manufacturing issue by providing adequate pad spacing.
Solution Approach 2:
Instead of concentrating all pads in one linear binding region, the binding regions are distributed in multiple dimensions around the display region (first binding region at first side, second binding region at second side, etc.), effectively using spatial distribution to reduce pad density.
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel has a first display region and a binding region at least partially surrounding the first display region and includes pixel units arranged in the first display region and pads including first and second pads. The pixel units each include a sub-pixel. The binding region includes first and second binding regions. The first pad and the second pad are provided in the first binding region and the second binding region, respectively. A signal transmitted by the first pad is different from a signal transmitted by the second pad.