Transparent Display Light Conversion Panel Transmittance
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Solution Overview
Problem
Existing transparent display devices face challenges in achieving high light transmittance in their transmissive areas, which limits their performance and user experience.
Innovation Solution
The proposed transparent display device incorporates a light conversion panel with a specific structure, including a base layer, a color filter, a low refractive layer with a transmission opening, a first capping layer, and a second capping layer, which enhances light transmittance in the transmissive area without overlapping with the color filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color filter is used in the light conversion panel, then color purity and light extraction efficiency are improved, but light transmittance in the transmissive area deteriorates
Solution Approach 1:
The light conversion panel is divided into distinct regions: a pixel area with color filters for color display, and a transmissive area without color filters for high light transmission. This spatial segmentation allows each region to fulfill its specific function optimally - the pixel area provides color purity through color filters while the transmissive area maintains high light transmittance by excluding color filters entirely.
Solution Approach 2:
Different regions of the light conversion panel are assigned different optical properties. The pixel area incorporates color filters to achieve high color purity, while the transmissive area is designed with minimal optical components (only base layer, low refractive layer, and capping layer) to maximize light transmission. This local differentiation of quality allows simultaneous optimization of both color purity and light transmittance in different areas.
2Reliability
If multiple layers are added to the light conversion panel, then manufacturing precision and reliability are improved, but device complexity increases
Solution Approach 1:
The color filter layer is extracted and removed from the transmissive area while being retained in the pixel area. This selective extraction simplifies the structure in the transmissive area to only essential layers (base layer, low refractive layer, and capping layer), reducing device complexity without compromising the reliability of the overall display system.
Solution Approach 2:
The patent introduces a low refractive layer between the base layer and capping layer, adding a functional dimension to the layer structure. This low refractive layer serves multiple purposes: it reduces reflection, improves light extraction efficiency, and maintains structural integrity. By adding this specialized layer with specific optical properties, the design achieves improved manufacturing precision and reliability without proportionally increasing overall 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
This configuration improves light transmittance in the transmissive area, allowing for better visibility and user experience in transparent display applications.
Implementation Method 1
a low refractive layer provided with a transmission opening defined therethrough and corresponding to the transmissive area
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A display device includes a display area including a transmissive area and a non-display area adjacent to the display area. The display device includes a display panel including a light emitting element layer and a light conversion panel on the display panel. The light conversion panel includes a base layer, a color filter under the base layer, a low refractive layer under the color filter, a first capping layer under the low refractive layer, and a light control layer under the color filter and including a partition pattern, a plurality of light control portions spaced apart from each other by the partition pattern, and a second capping layer under the partition pattern and the light control portions. The low refractive layer is provided with a transmission opening defined therethrough to correspond to the transmissive area.