Display Device Shielding Layer for Sensor Signal Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in reducing the risk of electrical signals due to parasitic capacitance and require improved process convenience while integrating sensors.
Innovation Solution
The display device incorporates a shielding layer and transparent planarization layer between the light emitting element and sensor part, using a transparent conductive material and acryl-based resin composition, with a shielding layer electrically connected to a second connection electrode and trace lines passing through the transparent planarization layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor part is integrated on the display part, then the functionality of the display device is improved, but parasitic capacitance increases and electrical signal reliability deteriorates
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the display part and sensor part. This shielding layer acts as a mediator that blocks electrical interference and reduces parasitic capacitance coupling between the two functional parts, thereby maintaining signal reliability while allowing both display and sensor functionalities to coexist
Solution Approach 2:
The display device is segmented into distinct functional zones with the shielding layer creating an electrical separation between the display part and sensor part. This segmentation isolates the electrical signals from each component, preventing interference while maintaining overall device functionality
2Reliability
If the shielding layer is added between the light emitting element and sensor part, then parasitic capacitance is reduced and electrical signal reliability is improved, but device complexity increases
Solution Approach 1:
The shielding layer is designed to serve multiple functions simultaneously: it provides electrical shielding to reduce parasitic capacitance, maintains structural integrity of the device, and can be integrated with existing manufacturing processes. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
3Ease of manufacture
If the transparent planarization layer is disposed on the shielding layer, then manufacturing process convenience is improved, but the number of layers and device complexity increases
Solution Approach 1:
The transparent planarization layer is applied in advance during the manufacturing process to create a flat surface on the shielding layer. This preliminary action simplifies subsequent manufacturing steps by providing a uniform base for depositing additional layers or forming patterns, thereby improving overall process convenience despite adding a layer
Data Source
AI summary
A display device includes a display part configured to emit light, and a sensor part disposed on the display part and including sensing electrodes. The display part includes a first electrode and a second electrode spaced apart from each other, a light emitting element disposed between the first electrode and the second electrode in a plan view and including a first end and a second end, a first connection electrode electrically connected to the first end, a second connection electrode electrically connected to the second end, a shielding layer overlapping the light emitting element in a plan view, and a transparent planarization layer disposed on the shielding layer.