Splicing Screen Pad Layout for Narrow-Bezel Signal Routing
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Solution Overview
Problem
Existing splicing screens have a non-display area between sub-display screens due to the need for bonding integrated circuits and flexible circuit boards, which occupies space and prevents normal display.
Innovation Solution
A splicing screen design that uses connecting plates and pads to electrically connect gate signal lines and data lines between sub-display screens, eliminating the need for driving circuits at the edges of sub-display screens and reducing the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If integrated circuits and flexible circuit boards are bonded on the edge of spliced sub-display screens, then electrical connection between sub-display screens is achieved, but the bonding area occupies space and increases the width of non-display area
Solution Approach 1:
The patent moves the electrical connection interface from the edge dimension to the surface dimension by placing pads on the display surface. This allows connection traces to be routed through the light-emitting layers rather than requiring edge bonding, effectively utilizing the Z-dimension (light emission path) to resolve the space conflict.
Solution Approach 2:
The patent uses transparent conductive layers and pads that optically copy or transmit light through the connection areas, making the bonding areas invisible or transparent. This allows the connection structures to occupy physical space without blocking light emission, effectively reducing the functional non-display area.
2Ease of operation
If driving circuits are mounted at the edges of sub-display screens, then control signals can be provided to each sub-display screen, but the edge-mounted circuits increase the splicing slit width
Solution Approach 1:
The patent merges the driving circuit functions directly into the sub-display screen structure by integrating pixel driving circuits within the display area. This eliminates the need for separate edge-mounted driving circuits, as the display pixels themselves perform the driving function, thereby reducing splicing slit width.
Solution Approach 2:
The patent relocates driving circuit functionality from the edge (2D plane) to within the display area (utilizing the light emission dimension). By embedding driving circuits within the active display region, the patent eliminates external edge mounting requirements and reduces splicing slit width.
3Area of stationary object
If pads and connecting plates are used to connect signal lines between sub-display screens, then the non-display area is reduced, but the structural complexity increases
Solution Approach 1:
The patent uses thin transparent conductive films and flexible pad structures that can be deposited directly onto the display surface. These thin-film connection structures replace bulky edge-mounted connectors, reducing both visual obstruction and structural complexity while maintaining electrical functionality.
Data Source
AI summary
A splicing screen includes a connecting plate and two sub-displays. The sub-display screens include gate signal lines, data lines, and first pads, each of which is electrically connected to a data line or a gate signal line. The connecting plate is arranged on one side of the sub-display screen facing away from a light-emitting side thereof. Two first pads connected to the data lines or gate signal lines of two sub-display screens that are spliced are connected in pair by the connecting plate. By utilizing pads and the connection plate to achieve a communication between the signal lines in the sub-display screens without needing, a drive circuit at an edge of each sub-display screen, a width of the non-display area at the splicing slit is reduced. The first pads are provided at one side of the sub-display screen facing the connecting plate, which reduces the width of the splicing slit.