Electronic Panel Boundary Pattern Undercut Shape for Transmittance
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Solution Overview
Problem
Existing electronic apparatuses face challenges in efficiently integrating a display unit and sensing unit while maintaining high transmittance and reducing the bezel region area, which affects the device's design and functionality.
Innovation Solution
The electronic apparatus is designed with a high-transmission region that overlaps the electronic module, surrounded by an active region, featuring a boundary pattern with an undercut shape and a layered structure including inorganic and organic layers, which enhances transmittance and allows for a reduced bezel area without mechanical holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a conventional display panel structure is used with mechanical holes for electronic modules, then the electronic module can be integrated, but the bezel area increases and light transmittance decreases
Solution Approach 1:
The display panel is divided into distinct functional regions: a central region for high light transmittance (overlapping the electronic module), a pattern region with the boundary pattern, and an active region for pixel display. This segmentation allows each region to be optimized for its specific function while collectively solving the contradiction between bezel area reduction and light transmittance maintenance.
Solution Approach 2:
Different regions of the display panel are assigned different optical properties: the central region uses a first inorganic layer with lower visible light transmittance, while the pattern region uses a second inorganic layer with higher visible light transmittance. This local differentiation allows the central region to reduce overall bezel area while the pattern region maintains high light transmittance for the electronic module area.
2Reliability
If the first inorganic layer covers the central region, then encapsulation is improved, but visible light transmittance decreases
Solution Approach 1:
The first inorganic layer is strategically positioned to cover only the pattern region and extend partially toward the central region, while the second inorganic layer with higher transmittance covers the central region. This local quality differentiation ensures that encapsulation is maintained where needed (pattern region) while maximizing light transmittance where the electronic module is located (central region).
Solution Approach 2:
The encapsulation structure uses a composite of two different inorganic layers with distinct optical properties. The first inorganic layer provides robust encapsulation and chemical stability, while the second inorganic layer provides high optical transparency. This composite structure resolves the contradiction between encapsulation reliability and light transmittance by combining materials with complementary properties.
3Ease of manufacture
If the boundary pattern is made with a single layer, then manufacturing is simpler, but the undercut shape and optical performance are compromised
Solution Approach 1:
The boundary pattern is constructed from multiple inorganic layers with different etch rates and optical properties. The first inorganic layer forms the base structure, while the second inorganic layer creates the undercut profile and provides enhanced optical performance. This multi-layer composite approach enables the complex undercut geometry and optimized light transmittance that would be difficult to achieve with a single layer, while still maintaining reasonable manufacturing complexity through sequential deposition and etching processes.
Data Source
AI summary
An electronic apparatus includes an electronic module that outputs or receives light, and an electronic panel that is divided into a first region overlapping the electronic module, a second region surrounding at least a portion of the first region, and a third region adjacent to the second region. The electronic panel includes a base substrate, a plurality of pixels that are disposed on the base substrate and display light on the second region, an encapsulation layer that is disposed on the base substrate and covers the pixels, and a boundary pattern on the first region. The boundary pattern has an undercut shape.