Quantum Dot Display Panel Built-in Polarizing Layer
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Solution Overview
Problem
Current quantum dot display technologies face challenges in controlling the on and off of natural light emitted by quantum dot pixel layers and require complex and costly manufacturing processes for built-in polarizing layers.
Innovation Solution
A quantum dot display panel with a built-in polarizing layer, comprising a light-cutoff layer, quantum dot pixel layer, blocking layer, reflection layer, coating layer, and polyimide layer, where the built-in polarizing layer is coated directly in the cell, simplifying the process and reducing thickness and cost, allowing control of light emission through cooperation with an external polarizer and liquid crystal layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a built-in polarizing layer is introduced to control light emission, then light control capability is improved, but manufacturing process complexity and cost increase
Solution Approach 1:
The patent merges the polarizing layer with the color filter substrate by directly coating the polarizing solution on the color filter substrate surface. This integration eliminates the need for separate polarizing layer fabrication and assembly steps, thereby simplifying the manufacturing process while achieving the desired light control capability.
Solution Approach 2:
The color filter substrate serves multiple functions: it acts as both the color filtering layer and the substrate for the polarizing layer. By making the color filter substrate universal (serving dual purposes), the patent reduces the number of separate components and manufacturing steps required, thus lowering process complexity and cost.
2Ease of operation
If a traditional external polarizer is used, then light control is achieved, but device thickness remains large
Solution Approach 1:
The patent embeds the polarizing layer within the color filter substrate structure, nesting the polarizing function inside the existing device architecture. This nested configuration eliminates the need for a separate external polarizer layer, significantly reducing the overall device thickness while maintaining light control functionality.
3Illumination intensity
If quantum dot pixel layer emits natural light, then high brightness and color purity are achieved, but light emission cannot be controlled
Solution Approach 1:
The patent introduces a polarizing layer as an intermediary between the quantum dot pixel layer and the external environment. This intermediary layer selectively transmits polarized light while blocking non-polarized light, enabling precise control over the natural light emission from the quantum dot pixels while preserving their high brightness and color purity characteristics.
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 enables efficient control of light emission states, achieving significant thinness and cost reduction while maintaining high color purity and brightness, surpassing traditional LCDs and competing with OLEDs.
Implementation Method 1
a built-in polarizing layer evenly coated on a surface of a side of the coating layer away from the reflection layer
Implementation Method 2
a liquid crystal layer disposed between the array substrate and the color film substrate
Implementation Method 3
quantum dot pixel layer disposed on a surface of a side of the light-cutoff layer away from the cover plate
Data Source
AI summary
The present invention provides a quantum dot display panel, a quantum dot display device, and a preparation method thereof. The quantum dot display panel includes an array substrate, a color film substrate, and a liquid crystal disposed between the array substrate and the color film substrate, wherein the color film substrate includes a cover plate, a light-cutoff layer, a quantum dot pixel layer, a blocking layer, a reflection layer, a coating layer, a built-in polarizing layer, an isolation unit, and a polyimide (PI) layer.