Light Path Control Member with Buffer Layer for Yellowing Prevention
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Solution Overview
Problem
The existing light path control members suffer from yellowing phenomena due to reactions between anions and electrodes, leading to reduced visibility and light transmittance.
Innovation Solution
A light path control member with a first substrate, a first electrode, a second substrate, a second electrode, and a light conversion unit, featuring a buffer layer between the first substrate and the light conversion unit, and using different materials for the electrodes to minimize anion reactions and include a buffer layer to control light path direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single material electrode is used in the light path control member, then the device structure is simple, but yellowing phenomenon occurs due to anion reactions with the electrode, reducing visibility and reliability
Solution Approach 1:
The patent applies composite materials by using different materials for the first electrode and second electrode. Specifically, the first electrode uses a material resistant to anion reactions (such as ITO, IZO, or InSO) while the second electrode uses a different conductive material. This composite electrode structure prevents yellowing phenomenon caused by anion reactions with the first electrode, while maintaining overall device functionality and electrical performance.
2Reliability
If light can travel in all directions, then light transmittance is maximized, but lateral light leakage reduces image quality and viewing angle control
Solution Approach 1:
The patent applies local quality by creating an asymmetric light path control structure where the first light path control layer and second light path control layer have different configurations or properties. This allows light to be controlled differently in different regions or directions, enabling preferential light transmission in the forward direction while blocking lateral leakage, thus improving image quality and viewing angle control without requiring complex manufacturing processes.
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
Prevents yellowing of the electrodes, enhances visibility, and improves light transmittance by reducing lateral light leakage and controlling light directionality.
Implementation Method 1
the path of light passing through the light path control member is controlled to be closer to a front direction
Implementation Method 2
a light conversion unit disposed between the first electrode and the second electrode and including a receiving part receiving a light conversion material
Data Source
AI summary
An light path control member according to an embodiment includes a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; a light conversion unit disposed between the first electrode and the second electrode and including a receiving part receiving a light conversion material; and a buffer layer disposed between the first substrate and the light conversion unit, and wherein the first electrode and the second electrode include different materials.