Bridge Electrode Insulating Layer Patterns for Touch Display Transmittance
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Solution Overview
Problem
Display devices with touch functionality face challenges in improving transmittance and reducing contact resistance, particularly due to the limitations of existing electrode structures and insulating layer configurations.
Innovation Solution
The proposed solution involves a display device with a touch device that includes a substrate, bridge electrodes, and insulating layer patterns, where the insulating layer is formed only on a portion of the bridge electrode and at the edge of the substrate, allowing for increased transmittance and reduced contact resistance by enlarging the contact area between electrodes and omitting unnecessary bezel space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating layer is formed on the entire bridge electrode to prevent short circuits, then electrical insulation is improved, but light transmittance deteriorates
Solution Approach 1:
The insulating layer is selectively formed only at both ends of the first bridge electrode where contact with first electrodes is required, rather than covering the entire bridge electrode. This localized application provides electrical insulation at critical contact points while leaving the central portion exposed to maximize light transmittance.
2Reliability
If the contact area between bridge electrode and electrode is increased to reduce contact resistance, then electrical conductivity is improved, but device area increases
Solution Approach 1:
The insulating layer patterns are positioned at both ends of the bridge electrode, effectively utilizing the longitudinal dimension of the electrode structure. This arrangement increases the contact area between the bridge electrode and first electrodes along the length of the bridge electrode without expanding the lateral footprint of the device.
Data Source
AI summary
A display device with a touch device comprises a substrate, a first bridge electrode positioned on the substrate, a plurality of insulating layer patterns covering both ends and a central portion of the first bridge electrode, a plurality of first electrodes separately positioned on the substrate comprising the insulating layer patterns, and connected to the first bridge electrode, a second bridge electrode positioned on the insulating layer patterns covering the central portion of the first bridge electrode, and crossing the first bridge electrode, and a plurality of second electrodes positioned to be separated from the first electrode on the substrate and integrally connected with the second bridge electrode.