Transparent Layer Refractive Index for Display Light Management
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Solution Overview
Problem
Existing display devices face challenges in maintaining display quality due to undesired absorption and scattering of light in the third transparent substrate, which degrades the image clarity and efficiency of light utilization from light emitting elements.
Innovation Solution
A display device configuration featuring a liquid crystal layer with striped polymers and liquid crystal molecules between two transparent substrates, along with a transparent layer having a lower refractive index than the substrates, is used to prevent light from entering the third transparent substrate, thereby minimizing absorption and scattering and enhancing light utilization in the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light passes through the third transparent substrate, then the display device can be viewed from outside, but light absorption and scattering occur in the third substrate degrading display quality
Solution Approach 1:
The patent applies the principle of converting harm into benefit by utilizing the refractive index difference between the second substrate and third substrate to create a light reflecting interface. This interface, which would normally cause harmful light scattering and absorption, is instead engineered to reflect light back into the liquid crystal layer, converting the harmful scattering effect into a beneficial light recycling mechanism that improves display quality.
Solution Approach 2:
The patent introduces an intermediary approach by utilizing the interface between the second transparent substrate and third transparent substrate as a light management layer. This interface acts as a mediator that controls light propagation, reflecting light back into the liquid crystal layer while allowing the display to remain viewable from outside, thus resolving the contradiction between light utilization and display quality.
2Loss of energy
If light is reflected back into the display panel, then light utilization efficiency improves, but the structure becomes more complex
Solution Approach 1:
The patent applies universality by making the interface between the second and third substrates serve multiple functions: it acts as both a structural boundary of the display device and an optical element for light reflection. This multi-functional design achieves improved light utilization efficiency without adding separate complex light management components, thus resolving the contradiction between energy efficiency and structural complexity.
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 configuration effectively prevents the degradation of display quality by ensuring efficient light usage and maintaining image clarity by reflecting light back into the display panel, allowing for improved local dimming and illumination performance.
Implementation Method 1
a transparent layer located between the display panel and the third transparent substrate and having a second refractive index that is lower than a first refractive index of the first transparent substrate and the second transparent substrate
Data Source
AI summary
According to one embodiment, a display device includes a display panel including a first substrate including a first transparent substrate having a first main surface, a first opposite and a side surface, a second substrate including a second transparent substrate having a second main surface and a second opposite surface, and a liquid crystal layer located between the first substrate and the second substrate, a light emitting element opposed to the side surface, a third transparent substrate, and a transparent layer located between the display panel and the third transparent substrate and having a second refractive index that is lower than a first refractive index.