Display Substrate Static Discharge via Conductive Layer
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Solution Overview
Problem
Display apparatuses using microshutters face defects due to static electricity, which can damage circuits and complicate manufacturing processes.
Innovation Solution
A display apparatus design featuring a first substrate with a conductive light-reflecting layer and a ground wire to discharge static electricity, combined with a manufacturing method using only two masks to simplify production and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a microshutter-based display apparatus is used to achieve high light efficiency and high speed switching capability, then response speed is improved, but static electricity damage to circuits occurs
Solution Approach 1:
The conductive light-reflecting layer, originally designed for optical functions, is utilized to provide an additional electrostatic discharge pathway. This converts a potentially harmful static electricity accumulation into a beneficial protection mechanism for the microshutter circuits, allowing the display to maintain high response speed while protecting against static damage.
Solution Approach 2:
The conductive light-reflecting layer serves as an intermediary element between the microshutter circuits and the external environment. It provides a controlled pathway for static electricity to discharge safely through the ground wire connection, preventing direct damage to sensitive circuits while maintaining the high-speed switching capability of the microshutters.
2Manufacturing precision
If multiple masks are used in the manufacturing process to achieve precise patterning, then manufacturing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The conductive light-reflecting layer is designed to serve multiple functions simultaneously: it provides electrostatic discharge pathways, reflects light for display operation, and serves as a structural element in the display architecture. This multi-functionality eliminates the need for separate dedicated electrostatic protection structures, reducing manufacturing complexity while maintaining precision.
Solution Approach 2:
The electrostatic protection function is merged with the light-reflecting function in a single layer structure. By combining these functions into one element rather than using separate components, the manufacturing process is simplified while achieving both precise patterning and effective static electricity protection.
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
The solution effectively prevents static electricity damage to circuits and simplifies the manufacturing process by discharging static electricity externally, enhancing the reliability and cost-effectiveness of the display apparatus.
Implementation Method 1
The conductive light-reflecting layer and the light absorbing layer have a first opening to transmit a light. The ground wire is provided on the second insulating substrate to contact the exposed conductive light-reflecting layer. Static electricity generated in the first substrate is discharged to the exterior through the ground wire
Implementation Method 2
The spacer is disposed on the first insulating substrate to maintain a distance between the first insulating substrate and the second insulating substrate
Implementation Method 3
The shutter part is movable so as to transmit or block the light according to an overlap between the first opening and the second opening
Implementation Method 4
The conductive light-reflecting layer covers the spacer and the contact spacer
Implementation Method 5
The light-absorbing layer covers the conductive light-reflecting layer and exposes the conductive light-reflecting layer in areas corresponding to an upper surface of the spacer and an upper surface of the contact spacer
Data Source
AI summary
A display apparatus includes a first insulating substrate including a display area in which a first opening is formed, as well as a non-display area. A second insulating substrate faces the first insulating substrate. The second insulating substrate includes a shutter part having a second opening corresponding to the first opening. The shutter part moves between two different positions to transmit or block light according to an overlap between the first opening and the second opening.