Backlight Assembly Peep-Proof Microstructures Yield
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices with peep-proof and normal display modes face manufacturing challenges due to the light adjustment layer's susceptibility to thermal expansion, electrostatic absorption, and foreign matter, leading to low assembly yield and poor display effects.
Innovation Solution
A backlight assembly with a peep-proof layer and a light adjustment layer, featuring microstructures such as transparent particles or microlenses, which accommodate foreign matter and prevent protrusions, allowing for switching between peep-proof and normal display modes while improving manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a peep-proof layer and light adjustment layer are added to enable peep-proof display mode, then privacy protection is improved, but the light adjustment layer becomes susceptible to thermal expansion, electrostatic absorption, and foreign matter, leading to low assembly yield
Solution Approach 1:
The space between the peep-proof layer and light adjustment layer is segmented into multiple micro-cavities by arranging transparent particles or microlenses in arrays. This segmentation isolates foreign matter into specific cavities, preventing it from causing large-area defects and improving assembly yield while maintaining peep-proof functionality.
Solution Approach 2:
Transparent particles or microlenses are introduced as intermediary elements between the peep-proof layer and light adjustment layer. These intermediaries create controlled micro-cavities that accommodate foreign matter, preventing direct contact between the light adjustment layer and contaminants, thereby reducing defects and improving assembly yield.
2Manufacturing precision
If the light adjustment layer is made sensitive to foreign matter to prevent defects, then display quality is improved, but manufacturing complexity increases due to need for precise control of thermal expansion and electrostatic effects
Solution Approach 1:
The micro-cavities formed by transparent particles or microlenses serve as pre-prepared cushioning spaces that accommodate foreign matter before it can cause defects. This beforehand cushioning approach simplifies manufacturing control by providing a tolerance buffer, reducing the need for extremely precise control of thermal expansion and electrostatic effects.
3Productivity
If transparent particles or microlenses are introduced to accommodate foreign matter, then assembly yield is improved, but the structural complexity of the backlight assembly increases
Solution Approach 1:
The transparent particles or microlenses serve multiple functions: they maintain the peep-proof effect by controlling light transmission angles, create micro-cavities to accommodate foreign matter, and can also serve as structural support elements. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall structural complexity.
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 enhances the peep-proof functionality, prevents pockmark defects, and improves assembly yield by accommodating foreign matter and ensuring high display quality with controlled light distribution.
Implementation Method 1
a plurality of microlenses spaced apart from each other... When incident light enters the microlenses, the light is refracted and transmitted in a specific direction
Implementation Method 2
The light adjustment layer includes polymer dispersed liquid crystal
Data Source
AI summary
A backlight assembly and a display device including the backlight assembly are provided. The backlight assembly includes a light source unit, a peep-proof layer on a light emitting side of the light source unit, a light adjustment layer on a side of the peep-proof layer distal to the light source unit, and a plurality of first microstructures between the peep-proof layer and the light adjustment layer and spaced apart from each other.