Selective Reflective Layer for Array Substrate Light Utilization
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Solution Overview
Problem
Current liquid crystal display devices suffer from low light utilization efficiency and transmittance due to high absorption rates in color film substrates, leading to the need for excessive backlight to achieve the desired display effect.
Innovation Solution
Incorporating a selective reflective layer on the array substrate that reflects light of a specific wavelength range and transmits light of another range, allowing for the reuse of light and improving utilization efficiency and transmittance, with configurations such as green, blue, and red selective reflective units that correspond to filter units in the color film substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color film substrate with high absorption rate is used, then color display effect is improved, but light utilization efficiency and transmittance deteriorate
Solution Approach 1:
The reflective layer is segmented into multiple selective reflective units, each corresponding to different wavelength ranges (red, green, blue channels). Each unit selectively reflects specific wavelengths while transmitting others, enabling wavelength-specific light management that improves both display quality and light utilization efficiency
Solution Approach 2:
The patent converts the harmful effect of light absorption (which causes energy loss) into a beneficial effect by using the absorbed light to generate reflected light through the selective reflective units. The reflected light is redirected back through the liquid crystal layer, allowing secondary utilization of light that would otherwise be wasted, thus improving overall light utilization efficiency
2Loss of energy
If conventional reflective layer structure is used, then manufacturing is simple, but light utilization efficiency is low
Solution Approach 1:
The selective reflective layer serves multiple functions simultaneously: it acts as a reflective layer for light redirection, a wavelength-selective filter for color management, and a light efficiency enhancer by enabling secondary light utilization. This multi-functionality achieves improved light utilization without requiring separate components for each function
Solution Approach 2:
The reflective layer is constructed as a composite structure with multiple dielectric layers having different refractive indices arranged in alternating sequences. This composite material approach enables precise control of optical properties through interference effects, achieving wavelength-selective reflection and transmission while maintaining a relatively simple layered structure
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 significantly increases light utilization efficiency and transmittance by up to 100% compared to conventional structures, reducing the need for excessive backlight and enhancing display performance.
Implementation Method 1
The selective reflective layer comprises at least one selective reflective unit, the selective reflective units are configured to reflect light of a first wavelength range and transmit light of a second wavelength range
Implementation Method 2
the selective reflective units comprise a plurality of first dielectric layers and a plurality of second dielectric layers, which are alternately stacked, and the refractive index of the first dielectric layer is greater than that of the second dielectric layer
Data Source
AI summary
An array substrate includes a base substrate and a selective reflective layer. The selective reflective layer on the base substrate, and includes at least one selective reflective unit. The selective reflective unit is configured to reflect light of a first wavelength range and transmit light of a second wavelength range other than the first wavelength range.