Display Device Air Layer Color Conversion Light Efficiency
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Solution Overview
Problem
Display devices, such as LCD and OLED, face limitations in light output efficiency due to the reflection of light downward and outward, which reduces brightness and color reproduction quality.
Innovation Solution
A display device with a color conversion layer and an adhesion member is used, where the color conversion layer includes multiple conversion parts that absorb and emit different colors of light, and the adhesion member is strategically positioned between the display panel and these conversion parts, creating an air layer to enhance light reflection and output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a low refractive organic layer is provided to improve light output efficiency, then light utilization efficiency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the low refractive index function from organic material and uses air (natural low refractive index medium) instead. The air layer is created by spacing the color conversion layer from the display panel using spacers, eliminating the need for additional organic layers while maintaining the light reflection improvement function.
Solution Approach 2:
The patent uses air, which is freely available and costs nothing, instead of expensive low refractive organic materials. This substitution dramatically reduces material costs while achieving the same optical function of improving light output efficiency through refractive index mismatch.
2Illumination intensity
If a color conversion layer is added to improve color balance, then color reproduction is improved, but light reflection loss increases
Solution Approach 1:
The patent introduces an air layer as an intermediary between the display panel and the color conversion layer. This air layer acts as an optical mediator that improves the refractive index mismatch, reducing light reflection loss at the interface while allowing the color conversion layer to maintain its color balance improvement function.
3Illumination intensity
If multiple conversion parts are arranged to improve color purity, then color reproduction quality is improved, but manufacturing precision requirements increase
Solution Approach 1:
The color conversion layer is segmented into multiple conversion parts (first, second, and third conversion parts) with different color conversion functions arranged in sequence. Each part converts specific wavelengths independently, improving color purity through spectral separation while the air layer provides a stable reference plane for alignment.
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 significantly increases light output efficiency, improves brightness, and enhances color purity and reproduction, while reducing manufacturing complexity and costs by using an air layer with a low refractive index instead of additional organic layers.
Implementation Method 1
an air layer is defined between the display panel and the second and third conversion parts
Implementation Method 2
the color conversion layer includes a first conversion part configured to one of transmit a first color light and absorb first color light to emit second color light, a second conversion part configured to absorb the first color light to emit third color light, and a third conversion part configured to absorb the first color light to emit fourth color light
Data Source
AI summary
A display device includes a display panel, a color conversion layer disposed on the display panel, and an adhesion member between the display panel and the color conversion layer. The color conversion layer includes a first conversion part configured to one of transmit a first color light and absorb first color light to emit second color light, a second conversion part configured to absorb the first color light to emit third color light, and a third conversion part configured to absorb the first color light to emit fourth color light, the first conversion part, the second conversion part, and the third conversion part are sequentially arranged in a first direction, the adhesion member is disposed on a bottom surface and a side surface of the first conversion part and attached to the display panel, and an air layer is defined between the display panel and the second and third conversion parts.