Quantum Dot Display Layering for Color Mixing Suppression
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Solution Overview
Problem
The patterning process for light-emitting layers containing quantum dots that emit multiple colors is difficult to control, leading to light emission unevenness and color mixing in display devices.
Innovation Solution
A method is employed where a first layer including first quantum dots is formed in specific regions, making it non-light-emitting in certain areas, and a second layer including second quantum dots is formed while ensuring the second layer is also non-light-emitting in specific regions, thereby controlling the light emission patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light-emitting layers containing quantum dots that emit multiple colors are patterned into pixels for each emission color, then the display device can achieve full-color emission capability, but the patterning process becomes difficult to control and light emission unevenness or color mixing occurs
Solution Approach 1:
The light-emitting layer is divided into multiple sub-layers, each containing quantum dots of a specific color (red, green, blue). By segmenting the layer structure and controlling each sub-layer's light emission independently, the patent achieves precise color control and eliminates the need for complex patterning processes while maintaining full-color emission capability
Solution Approach 2:
Each sub-layer is designed with specific local properties: red quantum dot layer, green quantum dot layer, and blue quantum dot layer are positioned and configured to emit only their respective colors. This local quality differentiation ensures that each region emits the intended color without mixing, solving the color mixing problem while maintaining manufacturing simplicity
2Adaptability or versatility
If light-emitting layers are patterned into pixels for each emission color, then color separation is achieved, but light emission unevenness occurs due to process control difficulties
Solution Approach 1:
The light-emitting layer is segmented into multiple sub-layers with each sub-layer containing quantum dots of a specific color. This segmentation allows for uniform light emission control within each color channel, achieving reliable color separation without the light emission unevenness that occurs in conventional patterning methods
Solution Approach 2:
The quantum dot layers are pre-configured with specific optical properties and positions before device operation. The red, green, and blue quantum dot layers are arranged in predetermined configurations that ensure uniform light emission, eliminating the need for complex patterning processes that cause emission unevenness
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 approach effectively suppresses light emission unevenness and color mixing, resulting in improved display quality by precisely managing light emission in each pixel.
Implementation Method 1
a first layer including first quantum dots in each of a first region and a second region... forming a second layer including second quantum dots
Data Source
AI summary
A method for manufacturing a display device includes forming a first layer including first quantum dots in each of a first region and a second region, the first region and the second region each being a region in which a light-emitting device is formed, making the first layer in the second region non-light-emitting, forming a second layer including second quantum dots in each of the first region and the second region, and making the second layer in the first region non-light-emitting.