Transparent Capacitor Sealant Curing in Display Devices
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Solution Overview
Problem
The existing display device structure, where the gate driving circuit is formed on the lower substrate and overlapped with a sealant, prevents complete curing of the sealant due to light blocking, leading to moisture generation and potential corrosion of the circuit, reducing the reliability and lifespan of the device.
Innovation Solution
Incorporating a capacitor made of transparent conductive material in the driving circuit and using a light curable sealant that overlaps with an opaque area on the upper substrate, allowing light to penetrate and cure the sealant without damaging the circuit, thereby ensuring complete curing and preventing moisture-related malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gate driving circuit is formed on the lower substrate to improve production efficiency and narrow borders, then productivity and device compactness are improved, but the sealant cannot be cured completely due to light blocking by the circuit, reducing reliability
Solution Approach 1:
The substrate is divided into a light-transmissive region and a light-blocking region. The gate driving circuit is positioned in the light-blocking region, while the sealant is positioned in the light-transmissive region. This spatial segmentation allows the circuit to function normally while enabling complete sealant curing through selective light transmission.
Solution Approach 2:
Different regions of the substrate are assigned different optical properties. The light-transmissive region allows UV light to pass through for sealant curing, while the light-blocking region containing the gate driving circuit prevents light interference with the circuit operation. This local differentiation of optical characteristics resolves the contradiction between circuit integration and sealant curing.
2Device complexity
If the gate driving circuit is formed on the lower substrate, then device complexity is reduced, but moisture corrosion occurs due to incomplete sealant curing, reducing reliability and lifespan
Solution Approach 1:
The substrate is segmented into functional regions: a light-transmissive region for sealant placement and curing, and a light-blocking region for gate driving circuit placement. This segmentation ensures that the integrated circuit structure does not compromise sealant curing completeness, thereby preventing moisture intrusion and maintaining long-term reliability.
Solution Approach 2:
The substrate acts as an intermediary structure that mediates between the gate driving circuit and the sealant. By designing the substrate with differentiated optical regions, it enables the circuit to be integrated on the lower substrate while simultaneously ensuring complete sealant curing, thus preventing moisture corrosion and maintaining reliability.
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
This solution enhances the reliability and longevity of the display device by ensuring proper curing of the sealant and protecting the driving circuit from moisture-induced corrosion.
Implementation Method 1
a light curable sealant, the capacitor and the opaque area are at least partially overlapped with each other when viewing from a normal vector of the first substrate or the second substrate
Implementation Method 2
the capacitor which is made of a transparent conductive material
Data Source
AI summary
A display device and a method for manufacturing the same are provided. The display device includes a first substrate, a second substrate and a light curable sealant. The first substrate has a displaying area and a non-displaying area, in which the displaying area includes a pixel array, and the non-displaying area includes a driving circuit. The driving circuit includes at least a capacitor which is made of transparent conductive material. The second substrate has an opaque area. The light curable sealant is located between the first substrate and the second substrate. When viewing from a normal vector of the first substrate or the second substrate, the light curable sealant, the capacitor and the opaque area are at least partially overlapped with each other.