Display Input Sensing Bridge Patterns Module Hole Routing
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Solution Overview
Problem
Display apparatuses with integrated touch sensing units and display units face challenges due to increased thickness and high processing costs, particularly when trying to maintain display quality while electrically connecting touch sensing parts through a module hole.
Innovation Solution
The design incorporates a display apparatus with a base substrate, circuit layer, display element layer, and input sensing unit, featuring a module hole that allows for the connection of touch sensing parts without compromising display quality, using bridge patterns and insulation layers to ensure electrical connectivity while minimizing thickness and processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display unit and input sensing unit are integrated in one panel, then the touch sensing function is achieved, but the thickness and process cost increase
Solution Approach 1:
The patent divides the touch sensing unit into multiple independent sensing electrodes arranged in a matrix pattern across different layers. These segmented electrodes can be independently controlled and processed, allowing the touch sensing function to be achieved while reducing the overall complexity and thickness of the integrated panel by distributing the sensing function across multiple simpler components rather than requiring a single complex sensing layer.
2Illumination intensity
If module hole is used to connect touch sensing parts, then the display quality is maintained, but the electrical connection reliability deteriorates
Solution Approach 1:
The patent transitions from planar electrical connections to three-dimensional connections by routing conductors through vertical vias that pass through the module hole. This dimensional change allows electrical signals to be transmitted through the hole structure without compromising the display quality in the horizontal plane, while maintaining reliable electrical connection through the vertical dimension by using multiple stacked conductive layers and connection points.
Solution Approach 2:
The patent employs composite material structures at the module hole interface, combining conductive materials (such as transparent conductive oxides and metal layers) with insulating materials and protective layers. This composite structure ensures reliable electrical connection through the module hole while maintaining optical properties for display quality, as different materials are selected to optimize both electrical conductivity and optical transparency in different regions of the hole structure.
3Reliability
If bridge patterns are added to connect sensing parts around module hole, then electrical connectivity is improved, but the device complexity increases
Solution Approach 1:
The bridge patterns are designed to serve multiple functions simultaneously: they provide electrical connection pathways around the module hole, act as structural support elements, and function as additional sensing regions for touch detection. This multi-functionality reduces the need for separate dedicated components for each function, thereby improving electrical connectivity without proportionally increasing the overall device complexity.
Solution Approach 2:
The patent merges the bridge pattern structures with the existing electrode and conductor layers, combining what could be separate elements into integrated structures. The bridge patterns are formed as part of the same conductive layers that make up the sensing electrodes, eliminating the need for additional separate connection structures and reducing manufacturing steps while ensuring reliable electrical connectivity around the module hole.
Data Source
AI summary
A display apparatus including a base substrate including front and rear surfaces facing each other and in which a module hole passing through the first and rear surfaces is defined, a circuit layer including a driving element, a display element layer including a light emitting element, an encapsulation layer, and an input sensing unit. A routing area surrounding the module hole is defined in the base substrate. The input sensing unit includes a first touch line, a second touch line, and a bridge pattern. The first touch line includes first touch sensing parts arranged in a preset direction. The second touch line is insulated from and cross the first touch line. The bridge pattern is connected to the first touch sensing parts adjacent to the preset direction with the module hole therebetween and be disposed within the routing area. A slit is provided in the bridge pattern.