Light Control Member for Display Apparatus Thickness Reduction
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing the thickness of light control members while maintaining effective light control and color conversion for display panels.
Innovation Solution
A display apparatus is designed with a light control member comprising a substrate, a first light control layer for color conversion, a second light control layer for wavelength reflection, and a scattering layer, where the layers are stacked in a specific order to minimize thickness and enhance light control efficiency, using organic and inorganic materials to protect the first light control layer and optimize light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional light control member structures are used, then light control and color conversion functions are maintained, but the thickness of the light control member increases
Solution Approach 1:
The light control member is segmented into multiple functional layers: a first light control layer for color conversion, a second light control layer for wavelength reflection, and a scattering layer. Each layer performs a specific function, allowing the overall thickness to be reduced while maintaining comprehensive light control and color conversion efficiency through the coordinated action of discrete functional segments.
2Reliability
If protective layers are added to protect the first light control layer, then reliability is improved, but device complexity increases
Solution Approach 1:
The protective function is merged with the existing second light control layer and scattering layer. The second light control layer serves both as a wavelength reflection layer and as a protective barrier for the first light control layer. The scattering layer simultaneously provides light scattering functionality and structural protection, thereby achieving protection without adding separate protective layers that would increase device complexity.
3Reliability
If multiple light control layers are stacked, then light control efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
Each light control layer is designed with specific local properties optimized for its function: the first light control layer contains color conversion materials with specific emission characteristics, the second light control layer has wavelength-selective reflection properties, and the scattering layer has controlled scattering characteristics. This local optimization allows each layer to be manufactured independently with standard precision, reducing overall manufacturing complexity while maintaining high light control efficiency through the cumulative effect of specialized layers.
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 effectively reduces the thickness of the light control member while improving light control and color conversion efficiency, allowing for thinner and more efficient display apparatuses with enhanced luminance and color reproduction.
Implementation Method 1
a first light control layer which color-converts the first color light and outputs the color-converted light to the substrate
Implementation Method 2
a second light control layer which reflects light having a different wavelength range from a wavelength range of the first color light
Implementation Method 3
a scattering layer which scatters light incident thereto
Data Source
AI summary
A display apparatus includes: a display panel, a light source which emits a first color light; and a light control member which receives the first color light and emits color-converted light, the light control member including: a substrate through which the color-converted light is provided to the display panel; a first light control layer which color-converts the first color light and outputs the color-converted light; a second light control layer which reflects light having a different wavelength range from a wavelength range of the first color light; and a scattering layer which scatters light incident thereto. Within the light control member, the substrate, the first light control layer, the second light control layer and the scattering layer are disposed in order in a direction from the display panel to the light source.