IPS LCD Jumper Wiring for Segment Display Layout
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Solution Overview
Problem
Existing IPS mode liquid crystal display devices are not suitable for segment display types as they require a crossing section for electrode and lead wiring connections, increasing manufacturing processes and making it difficult to dispose electrodes and lead wirings on the same surface without a crossing section.
Innovation Solution
A direct-multiplex-driven IPS mode liquid crystal display device configuration that includes jumper wiring on one substrate to connect multiple lead wirings, allowing for flexible wiring layout without a crossing section, using conductive materials or sealing materials with conductive properties to simplify the configuration and increase the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crossing sections are provided for electrode and lead wiring connections in IPS mode liquid crystal display devices, then electrical connections can be established, but the number of manufacturing processes increases due to the need for insulating films
Solution Approach 1:
The patent extracts the insulating film formation step from the manufacturing process by designing a structure where lead wirings and electrodes are disposed on the same surface without crossing sections. This eliminates the need for additional insulating films at crossing points, thereby reducing manufacturing complexity while maintaining reliable electrical connections.
Solution Approach 2:
The patent transitions from a three-dimensional crossing configuration (where lead wirings cross over each other requiring insulating films) to a two-dimensional planar arrangement (where all lead wirings are disposed on the same surface without crossing). This dimensional change eliminates the need for insulating films while preserving electrical connectivity.
2Ease of manufacture
If all lead wirings are disposed on the same surface to avoid crossing sections, then manufacturing complexity is reduced, but the amount of lead wirings increases making it difficult to dispose each electrode and lead wiring on the same surface
Solution Approach 1:
The patent segments the display device into multiple display parts with corresponding electrodes and lead wirings. By dividing the wiring system into discrete segments that can be independently routed on the same surface, the patent manages wiring complexity while avoiding crossing sections. Each segment's lead wiring is carefully positioned to connect to its corresponding electrode without intersecting other wirings.
3Ease of manufacture
If crossing sections are eliminated in IPS mode liquid crystal display devices, then manufacturing processes are simplified, but it becomes difficult to connect electrodes and lead wirings without additional insulating structures
Solution Approach 1:
The patent applies preliminary action by pre-planning and pre-positioning all lead wirings and electrodes on the same surface during the design and fabrication stages. By carefully arranging the wiring layout before final assembly, the patent ensures that all connections can be made without crossing sections or additional insulating structures, simplifying the manufacturing process while maintaining connection ease.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy disposition of electrodes and lead wirings on the same surface, reducing manufacturing complexity and increasing the freedom of wiring layout, making it suitable for segment display types while maintaining effective brightness control and viewing angle dependency.
Implementation Method 1
achieving brightness control of display area by producing an electric field in the substantially horizontal direction on the substrate surface using the area between both electrodes, thereby changing the orientation of the liquid crystal layer
Implementation Method 2
the liquid crystal molecules of the liquid crystal layer change orientation on the substrate surface while remaining in a horizontal state when an electric field is applied
Data Source
AI summary
A liquid crystal display having a liquid crystal layer, a first substrate and a second substrate disposed facing each other and which sandwich the liquid crystal layer. First electrodes and second electrodes are both provided to one surface side of the first substrate. First lead wirings are provided to one surface side of the first substrate each connected to one of the first electrodes. Second lead wirings are provided to one surface side of the first substrate each connected to one of the second electrodes. A jumper wiring is provided to one surface side of the second substrate and superimposed with each portion of two or more second lead wirings of the plurality of second lead wirings and a conductive material interposed between each portion of the two or more second lead wirings and the jumper wiring, between the first substrate and the second substrate.