Color Conversion Panel Outgassing Venting Structure
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Solution Overview
Problem
Liquid crystal displays experience significant light loss and leakage due to outgassing and layer lifting issues during the manufacturing process of color conversion panels, leading to active unfilled area defects and reduced light transmission efficiency.
Innovation Solution
A color conversion panel design incorporating a light blocking member with a transflective layer and quantum dots, along with a capping layer and planarization layer, is used to prevent outgassing and layer lifting, while a light filtering layer with alternating refractive index layers enhances light transmission efficiency and reduces light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a color conversion panel is manufactured with multiple layers including quantum dots and color conversion materials, then color reproducibility and light transmission efficiency are improved, but outgassing occurs during manufacturing causing active unfilled area defects and light leakage
Solution Approach 1:
The patent extracts and removes harmful gases generated during the manufacturing process by forming an outlet in the color conversion panel that extends from the rear surface to the front surface. This outlet allows outgassing to escape during the manufacturing process, preventing the formation of active unfilled area defects and light leakage issues while maintaining the multi-layer color conversion structure for high color reproducibility
Solution Approach 2:
The patent introduces an intermediary outlet structure that mediates between the trapped outgassing and the external environment. The outlet serves as a controlled pathway that allows harmful gases to escape without compromising the integrity of the color conversion layers, thus resolving the contradiction between maintaining precise color reproduction and managing outgassing harm
2Loss of energy
If light filtering layers are added to reduce light loss, then light transmission efficiency is improved, but layer lifting occurs due to steps in the panel structure
Solution Approach 1:
The patent applies preliminary action by forming the outlet structure and planarization layers before finalizing the light filtering layer assembly. The outlet is created early in the manufacturing process to allow outgassing to escape before subsequent layers are deposited, preventing gas entrapment that would cause layer lifting. The planarization layer is also formed in advance to create a flat surface for subsequent light filtering layers
Solution Approach 2:
The patent resolves the layer lifting issue by transitioning from a two-dimensional planar structure to a three-dimensional structure with an vertical outlet pathway. The outlet extends through the thickness of the panel, providing a third-dimensional escape route for gases that prevents pressure buildup and subsequent layer lifting, while the light filtering layers are maintained in their functional positions
3Ease of manufacture
If the panel structure is simplified to prevent manufacturing defects, then ease of manufacture is improved, but light transmission efficiency and color reproducibility deteriorate
Solution Approach 1:
The patent applies universality by designing the outlet structure to serve multiple functions simultaneously: it acts as an outgassing pathway during manufacturing, provides structural support to prevent layer lifting, and maintains optical transparency for light transmission. This multi-functional design allows the panel to achieve both ease of manufacture and high light transmission efficiency without requiring separate components for each function
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 light loss and leakage, improves color reproducibility, and maintains high contrast ratios by preventing outgassing and layer lifting, resulting in enhanced display performance with improved viewing angles and frontal luminance uniformity.
Implementation Method 1
a light filtering layer with alternating refractive index layers enhances light transmission efficiency and reduces light leakage
Implementation Method 2
at least one color conversion layer disposed over the substrate; the at least one color conversion layer including a quantum dot layer including quantum dots
Data Source
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AI summary
A color conversion panel includes a substrate, a first color conversion layer and a second color conversion layer disposed on the substrate, a planarization layer covering the first color conversion layer and the second color conversion layer, and a polarization layer disposed on the planarization layer. An outlet from the planarization layer penetrates the polarization layer.