Reflection Preventing Layer for Display Panel Light Reflection
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Solution Overview
Problem
Display apparatuses with non-self-emissive panels, such as liquid crystal displays, suffer from reduced display quality due to external light reflection from signal lines, thin film transistors, and polarizing layers, which mixes with the displayed light and causes noise and deterioration in image contrast.
Innovation Solution
A reflection preventing layer is introduced between the display substrates and the gate lines or polarizing layers, utilizing a multi-layer structure with specific refractive indices and thicknesses to reduce reflected light through destructive interference, thereby minimizing the impact of external light reflections on image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional display panel structure is used without a reflection preventing layer, then the device complexity is low, but the display quality deteriorates due to external light reflection from signal lines, thin film transistors, and polarizing layers
Solution Approach 1:
A reflection preventing layer is introduced as an intermediary component between the polarizing layer and the external environment. This layer specifically targets and reduces reflected light from signal lines and thin film transistors without interfering with the normal operation of display elements, thereby improving display quality while maintaining manufacturing simplicity
Solution Approach 2:
The reflection preventing layer utilizes controlled changes in refractive index and layer thickness to reduce reflected light. By optimizing these parameters, the layer achieves effective reflection reduction across different wavelengths while maintaining compatibility with existing display panel structures and manufacturing processes
2Object-affected harmful factors
If a reflection preventing layer with multiple sub-layers is introduced to reduce reflected light, then the display quality is improved, but the device complexity increases
Solution Approach 1:
The reflection preventing layer is divided into multiple sub-layers, each with specific refractive index and thickness characteristics. This segmentation allows each sub-layer to target specific wavelength ranges or reflection sources, achieving comprehensive reflection reduction while maintaining overall structural simplicity and manufacturability
Solution Approach 2:
The reflection preventing layer employs composite material structures with different refractive indices arranged in specific sequences. This composite approach enables tailored optical properties that reduce reflected light from various display elements while maintaining compatibility with standard manufacturing techniques and existing panel architectures
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 reflection preventing layer effectively reduces the amount of reflected light, enhancing image contrast and display quality by controlling the refractive index and thickness of its sub-layers to achieve a reflectivity within a desired range, thus minimizing noise and improving light utilization efficiency.
Implementation Method 1
since the reflection preventing layer effectively reduces the amount of the reflected light reflected by the reflection preventing layer by using a destructive interference occurring between the reflected light reflected by the reflection preventing layer and the light reflected by the elements of the display panel
Implementation Method 2
an amount of the reflected light having a desired wavelength may be effectively reduced by controlling a refractive index and a thickness of the reflection preventing layer
Data Source
AI summary
A display apparatus includes a backlight assembly which generates a light and a display panel which receives the light to display an image, the display panel including a first substrate, a second substrate which faces the first substrate and is disposed closer to the backlight assembly than the first substrate, a gate line disposed on the first substrate, a data line disposed on the gate line and insulated from the gate line, a thin film transistor disposed on the first substrate and electrically connected to the gate line and the data line, and a reflection preventing layer disposed between the first substrate and the gate line to reduce an amount of a reflected light reflected by the gate line.