Transparent Display Panel Glue Filling for Optical Interference Reduction
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Solution Overview
Problem
Existing transparent display panels suffer from poor display effects due to gaps and air bubbles formed during the encapsulation process, leading to optical interference, dispersion, and reduced transmission rates.
Innovation Solution
A display panel design featuring a drive backplate with drive circuit regions and transparent regions, where the transparent regions include concave parts filled with light-transmissive glue. The glue's refractive index varies in a specific manner, and its surface is positioned on the side of the pads away from the substrate, ensuring proper coverage and reducing gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encapsulation glue is used to fill the concave parts, then the gaps and air bubbles are reduced, but the optical interference and dispersion occur due to refractive index mismatch
Solution Approach 1:
The patent changes the refractive index parameter of the encapsulation glue by creating a gradient distribution (1.45-1.55 in the concave parts and 1.35-1.45 in the flat parts) to match the optical properties of the underlying layers, thereby reducing optical interference and dispersion while maintaining reliable encapsulation
Solution Approach 2:
The patent applies different refractive index characteristics to different regions: the concave parts have a higher refractive index (1.45-1.55) to match the drive circuit layer, while the flat parts have a lower refractive index (1.35-1.45), creating localized optical property optimization that eliminates interference without compromising encapsulation integrity
2Manufacturing precision
If the encapsulation glue surface is positioned at the pad level, then the coverage is improved, but the manufacturing precision is reduced due to difficulty in controlling the filling process
Solution Approach 1:
The patent performs preliminary action by pre-forming concave parts in the drive backplate at specific positions and depths before the encapsulation process. This pre-structured geometry guides the encapsulation glue to naturally fill to the correct level, making the surface positioning automatic and eliminating the need for post-filling adjustment, thus achieving both high precision and ease of manufacture
Solution Approach 2:
The concave parts act as an intermediary structure that mediates between the drive circuit layer and the encapsulation glue. The geometry of these concave parts controls the glue filling process, ensuring the glue surface automatically aligns with the pad level without requiring complex control mechanisms, thereby simplifying manufacturing while maintaining precision
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 reduces optical interference and dispersion, improves the uniformity of the transmission rate, and enhances the overall display effect by minimizing gaps and air bubbles in the encapsulation process.
Implementation Method 1
a refractive index of the light-transmissive glue increases first and then decreases from the first surface to the second surface
Data Source
AI summary
The present disclosure provides a display apparatus and a display panel. The display panel includes: a drive backplate, including a substrate and a drive circuit layer on the substrate, where the drive circuit layer includes drive circuit regions arranged at intervals and transparent regions around the drive circuit regions, the transparent region includes concave parts, and a number of layers in the respective concave parts of the drive circuit layer is less than a number of layers in the respective drive circuit regions; a side of the drive circuit regions of the drive circuit layer away from the substrate includes pads for connecting a light-emitting unit; a light-transmissive glue for filling the concave parts, and a surface of the light-transmissive glue away from the substrate is on a side of the pads away from the substrate. The present disclosure can improve display effect.