Display Device Shielding Part Thickness Differential
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Solution Overview
Problem
Liquid crystal displays face issues with light leakage and reduced color reproducibility due to light interaction with the polarization and color filter layers, which affect the performance and reliability of the display device.
Innovation Solution
A display device design incorporating a first and second semiconductor, shielding parts, and an insulating layer with thickness differential regions, where the second shielding part has a larger thickness than the first, and the insulating layer has a smaller thickness over the second shielding part, along with a light unit emitting a specific wavelength to absorb light and prevent reflection from impacting the transistors, thereby reducing leakage current and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding part is added to absorb light and prevent light leakage, then color reproducibility and reliability are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
An insulating layer is introduced as an intermediary between the shielding part and the transistor. This insulating layer has a smaller thickness over the shielding part compared to regions without shielding, thereby reducing the overall height variation while maintaining the light-absorbing function of the shielding part. This resolves the contradiction by adding the necessary shielding function without proportionally increasing device complexity.
Solution Approach 2:
The insulating layer is designed with spatially varying thickness: a first thickness in regions without shielding parts and a smaller second thickness over the shielding parts. This local differentiation allows the structure to maintain uniform top surface height while preserving the light-absorbing capability where needed, thus improving reliability without excessive complexity increase.
2Stability of the object's composition
If the insulating layer thickness is reduced over the shielding part, then height uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The thickness parameter of the insulating layer is changed spatially: a first thickness value is used in non-shielding regions, and a smaller second thickness value is used over shielding parts. This parameter variation maintains height uniformity across the display device while the thickness difference compensates for the height variation caused by the shielding part, thereby improving overall composition stability.
3Object-affected harmful factors
If a thicker second shielding part is used for the second semiconductor, then light absorption effectiveness is improved, but the required insulating layer thickness variation increases
Solution Approach 1:
The insulating layer serves as a mediator that compensates for the height difference created by the thicker second shielding part. By having a smaller second thickness over the thicker shielding part, the overall height variation is reduced, maintaining height uniformity while preserving the enhanced light absorption capability where needed.
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 design effectively minimizes light leakage and enhances color reproducibility by absorbing light reflections and maintaining transistor performance, leading to improved display reliability and image quality.
Implementation Method 1
the first shielding part and the second shielding part may be configured to absorb the light of the first wavelength
Implementation Method 2
a color conversion layer disposed between the second substrate and the polarization layer
Data Source
AI summary
A display device includes: a first substrate including a display area and a non-display area disposed; a first semiconductor disposed in the display area; a second semiconductor disposed in the non-display area; a first data conductor overlapping the first semiconductor; a second data conductor overlapping the second semiconductor; a first shielding part overlapping the first semiconductor and disposed on the first data conductor; a second shielding part overlapping the second semiconductor and disposed on the second data conductor; an insulating layer disposed on the first shielding part and the second shielding part, wherein a second thickness of the second shielding part is larger than a first thickness of the first shielding part, and a fourth thickness of a second part of the insulating layer corresponding to the second shielding part is smaller than a third thickness of a first part of the insulating layer corresponding to the first shielding part.