Overlapping Power Lines for Narrow-Bezel Gate Driver Stability
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Solution Overview
Problem
The reduction of bezel size in display devices leads to signal delay and voltage changes in driving power transmitting lines due to narrowed non-display areas, causing increased resistance and voltage drops in gate drivers.
Innovation Solution
A display device design featuring a driving power transmitting line with a first and second power line overlapping with an insulating layer, connected through contact holes, and optionally divided into portions with cutouts or high resistance sections to reduce resistance and voltage drops, ensuring efficient power delivery to gate drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bezel size is reduced to increase the screen-to-body ratio, then the occupying ratio of the display screen is improved, but the width of the signal transmitting line is narrowed causing signal delay
Solution Approach 1:
The patent transitions from a single-plane signal transmitting line to a three-dimensional structure by stacking multiple signal transmitting lines in different layers. This vertical arrangement allows signals to travel through multiple parallel paths simultaneously, effectively reducing signal delay without requiring increased horizontal space, thus maintaining the reduced bezel design.
Solution Approach 2:
The signal transmitting line is divided into multiple segments arranged in different layers (first signal transmitting line in the first layer, second signal transmitting line in the second layer). This segmentation creates multiple parallel signal transmission paths, allowing signals to be transmitted concurrently through different segments, thereby reducing overall signal delay while maintaining compact horizontal dimensions.
2Area of stationary object
If the non-display area is reduced to increase the screen-to-body ratio, then the occupying ratio of the display screen is improved, but the resistance of the driving power transmitting line increases causing voltage drops
Solution Approach 1:
The patent stacks multiple power transmitting lines vertically across different layers, creating a three-dimensional power distribution network. This vertical arrangement increases the effective cross-sectional area for power transmission without expanding the horizontal footprint, thereby reducing resistance and voltage drops while maintaining the reduced bezel design.
Solution Approach 2:
Multiple power transmitting lines are combined in a vertical stack configuration, where the first power transmitting line and second power transmitting line occupy different layers but transmit power simultaneously. This merging of multiple transmission paths increases the overall current-carrying capacity and reduces equivalent resistance, preventing voltage drops despite the reduced non-display area.
Data Source
AI summary
A display device includes a display area including gate lines; a plurality of gate drivers disposed in a non-display area that is adjacent to the display area and connected to the gate lines; and a driving power transmitting line disposed in the non-display area and providing a driving power to the gate drivers. The driving power transmitting line includes a first driving power transmitting line and a second driving power transmitting line overlapping each other with an insulating layer disposed therebetween, the first driving power transmitting line and the second driving power transmitting line are connected with each other through a plurality of contact holes formed in the insulating layer, and the contact holes are disposed in a plurality of regions respectively overlapping the gate drivers in a direction parallel to an extending direction of the gate lines.