Light-Scattering Layer for Seal Hardening in Display Devices
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Solution Overview
Problem
Existing display devices face challenges in efficiently hardening the seal between substrates due to light-blocking by the wiring group, leading to potential sealing defects and increased resistance, which affects the display's reliability and image quality.
Innovation Solution
Incorporating a light-scattering layer between the seal and the top substrate, containing light-scattering particles with diameters ranging from 2 nm to 30 nm, to reflect and scatter light for effective seal hardening, while also using a light-blocking layer to enhance light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wiring group is placed between the seal and the bottom substrate, then electrical connections are achieved, but light transmission is blocked preventing effective seal hardening
Solution Approach 1:
A light-scattering layer is introduced as an intermediary between the wiring group and the seal. This layer contains light-scattering particles that reflect and scatter light back toward the seal, enabling the seal to receive sufficient light for hardening even when the wiring group blocks direct light transmission from the backlight unit.
2Device complexity
If the seal is positioned to overlap the wiring group, then device integration is improved, but light efficiency decreases due to wiring group blocking
Solution Approach 1:
The light-scattering layer converts the harmful light-blocking effect of the wiring group into a beneficial effect. By scattering light in multiple directions, the layer ensures that light reaches the seal through indirect paths, transforming the wiring group's obstruction into an opportunity for enhanced light distribution and seal hardening.
3Manufacturing precision
If light scattering particles are added to improve seal hardening, then sealing quality improves, but device complexity increases
Solution Approach 1:
The light-scattering layer is implemented as a relatively simple layer containing light-scattering particles dispersed in a matrix material. This approach achieves effective light scattering without requiring complex multi-layer structures, maintaining manufacturing simplicity while improving seal hardening quality.
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 effectively hardens the seal with minimal light emission, improving light efficiency and reducing resistance in the wiring group, thereby enhancing the display's reliability and image quality.
Implementation Method 1
a light-scattering layer between the seal and the top substrate, the light-scattering layer including light-scattering particles
Implementation Method 2
to reflect and scatter light for effective seal hardening
Implementation Method 3
hardening the seal by irradiating light from the bottom substrate toward the top substrate
Data Source
AI summary
A display device includes a bottom substrate including a display area and a non-display area around the display area, a thin film transistor region in the display area, the thin film transistor region including a plurality of thin film transistors and a plurality of pixel electrodes each electrically connected to a respective one of the thin film transistors, a top substrate facing the bottom substrate with the thin film transistor region therebetween, a seal in the non-display area to surround the thin film transistor region, the seal being configured to bond the bottom substrate to the top substrate, a wiring group between the seal and the bottom substrate, the wiring group including a plurality of conductive lines spaced apart from each other by a predetermined interval, and a light-scattering layer between the seal and the top substrate, the light-scattering layer including light-scattering particles.