Display Device Optical Structure Refractive Index Management
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Solution Overview
Problem
Display devices face the challenge of light leakage phenomena, which existing technologies have not adequately addressed, leading to inefficiencies in light emission and display quality.
Innovation Solution
A display device is designed with a substrate, pixel circuit, and an optical structure in the non-display area, featuring a first layer with a higher refractive index than the substrate, along with a middle layer and a reflective material layer, which together form an optical interface to manage light transmission and absorption, reducing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional display structure is used, then the device is simple in structure, but light leakage phenomenon occurs reducing display quality
Solution Approach 1:
The patent applies parameter changes by carefully selecting and controlling the refractive indices of different optical layers. The first optical layer has a refractive index higher than the substrate, the second optical layer has a refractive index lower than the first, and the third optical layer has a refractive index higher than the second. This systematic variation in refractive index parameters creates optimal light reflection and refraction at each interface, effectively preventing light leakage while maintaining a manageable structural complexity.
2Manufacturing precision
If additional optical layers are added to reduce light leakage, then light transmission control improves, but manufacturing complexity increases
Solution Approach 1:
The patent employs universality by integrating multiple functions into the optical layers. The same optical layers serve both as protective structures and as light management components. The layers with alternating high and low refractive indices simultaneously provide structural integrity, optical protection, and precise light transmission control, thereby achieving high manufacturing precision without proportionally increasing manufacturing complexity.
3Illumination intensity
If optical structure with multiple layers is implemented, then display quality improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by optimizing the optical properties at specific locations and interfaces within the display structure. Each optical layer is positioned and configured with specific refractive index characteristics tailored to its local function. The alternating high and low refractive index layers create localized optical effects at each interface, enhancing overall display quality through distributed local optimizations rather than uniform 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
The solution effectively reduces light leakage by controlling light transmission and absorption, enhancing display efficiency and quality without requiring additional processing steps or materials, thereby improving the overall performance of the display device.
Implementation Method 1
an optical structure on the substrate in a non-display area, and including a first layer, wherein a refractive index of the first layer is greater than a refractive index of the substrate
Implementation Method 2
The optical structure and the substrate may form an optical interface
Implementation Method 3
a third layer on the first layer, the third layer being configured to absorb light having a wavelength in a band
Data Source
AI summary
A display device includes: a pixel located on a substrate in a display area; and an optical structure located on the substrate in a non-display area, the optical structure including a first layer. A refractive index of the first layer is greater than a refractive index of the substrate.