Display Feedback Wiring Layout for Accurate Pixel Voltage Sensing
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Solution Overview
Problem
Existing display apparatuses face challenges in accurately monitoring driving voltage due to issues with additional wiring for voltage sensing, leading to inconsistent voltage supply and potential brightness problems in pixels.
Innovation Solution
A display apparatus design featuring a substrate with a main area, bending area, and sub-area, including a feedback wiring system that transmits feedback voltage between pixels and the driving unit, allowing for direct contact with the interlayer insulating layer, and a multi-layered feedback wiring structure to ensure accurate voltage monitoring and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional wiring is used to monitor driving voltage, then voltage sensing capability is improved, but wiring reliability deteriorates due to potential problems in the additional wiring
Solution Approach 1:
The feedback wiring serves dual purposes: it transmits feedback voltage signals for voltage monitoring while also functioning as part of the interlayer insulating layer structure. This eliminates the need for separate additional wiring dedicated solely to voltage sensing, thereby maintaining measurement precision while improving wiring reliability by reducing the total number of wiring components.
Solution Approach 2:
The feedback wiring is merged with the interlayer insulating layer structure, where the feedback wiring is located between the interlayer insulating layer and the first organic insulating layer. This integration combines the monitoring function with the existing insulating layer architecture, reducing wiring complexity and potential failure points while maintaining accurate voltage sensing capability.
2Device complexity
If feedback wiring is integrated into the insulating layer structure, then wiring complexity is reduced, but contact stability may worsen
Solution Approach 1:
The feedback wiring is pre-integrated into the insulating layer structure during the manufacturing process, establishing stable contact interfaces before final assembly. The feedback wiring is positioned between the interlayer insulating layer and the first organic insulating layer, with preliminary contact establishment ensuring reliable electrical connection while maintaining structural simplicity.
Solution Approach 2:
The feedback wiring structure utilizes composite material layers, where the feedback wiring is embedded within the multi-layer insulating structure. This composite construction provides both mechanical stability for reliable contact and electrical insulation properties, reducing overall wiring complexity while ensuring stable electrical connection throughout device operation.
Data Source
AI summary
A display apparatus including: a substrate; an interlayer insulating layer on the substrate; a first organic insulating layer on the interlayer insulating layer; a first connection wiring configured to transmit a driving voltage to the plurality of pixels on the interlayer insulating layer and having at least a portion extending in a first direction; a driving unit configured to supply the driving voltage to the plurality of pixels through the first connection wiring; and a feedback wiring configured to transmit a feedback voltage between the plurality of pixels and the first connection wiring to the driving unit on the interlayer insulating layer and being in direct contact with a top surface of the interlayer insulating layer in at least a portion of the sub area, wherein the driving unit is configured to adjust the driving voltage, based on the feedback voltage.