Display Device Insulating Coating Flexible Substrate Conduction
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Solution Overview
Problem
In display devices using the COG mounting scheme, positional deviations between the functional-unit-purpose flexible substrate and the display driving component can lead to potential conduction and erroneous operation, requiring additional insulation measures like affixing tape.
Innovation Solution
A display device structure featuring a first flexible substrate with an insulating coating portion between the display driving component and a second flexible substrate, eliminating the need for separate insulation members and reducing operational complexity and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the functional-unit-purpose flexible substrate and display driving component are overlaid in plan view to support high definition display, then display quality is improved, but the risk of potential conduction and erroneous operation increases due to positional deviation
Solution Approach 1:
An insulating coating portion is introduced as an intermediary layer between the display driving component and the functional-unit-purpose flexible substrate. This mediator prevents direct contact and potential conduction while allowing both components to maintain their high-definition overlay arrangement, thus resolving the contradiction between display quality and operational reliability
2Reliability
If separate insulation measures such as affixing insulation tape are added to prevent potential conduction, then operational reliability is improved, but device complexity and manufacturing steps increase
Solution Approach 1:
The insulation function is merged with the existing first flexible substrate by forming an insulating coating portion on it. This integration eliminates the need for separate insulation tapes or additional insulation components, maintaining operational reliability while simplifying the overall device structure and reducing manufacturing complexity
Solution Approach 2:
The first flexible substrate is given multiple functions: it serves both as a signal transmission substrate and as an insulating structure through the insulating coating portion. This multi-functionality reduces the number of separate components needed, thereby reducing device complexity while maintaining reliability
3Reliability
If separate insulation members and additional mounting steps are added to prevent potential conduction, then operational reliability is improved, but manufacturing cost and production time increase
Solution Approach 1:
The insulation function is combined with the first flexible substrate through coating formation, eliminating the need for separate insulation members and their associated mounting steps. This integration reduces manufacturing complexity and production time while maintaining operational reliability
Solution Approach 2:
The insulating coating portion is formed on the first flexible substrate in advance during the substrate manufacturing process, before final assembly. This preliminary action eliminates the need for separate insulation installation steps during device assembly, reducing manufacturing cost and production time while ensuring reliability
Data Source
AI summary
A display device includes a display panel, a functional unit, a first flexible substrate, a display driving component, and a second flexible substrate. The display panel includes a first substrate and a second substrate. The second substrate includes a portion overlapping the first substrate and a non-overlapping portion not overlapping the first substrate. The first flexible substrate is connected to the non-overlapping portion. The first flexible substrate includes an insulator base with flexibility and an insulating coating portion disposed between the display driving component and the second flexible substrate. The display driving component is mounted on the non-overlapping portion to process a signal from the first flexible substrate and to supply the processed signal to the display panel. The second flexible substrate is connected to the first substrate to transmit a signal for driving the functional unit. The second flexible substrate is disposed to overlap the non-overlapping portion.