Selective Reflective Layer for LCD Red Light Color Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices using polymer dispersed liquid crystals face degradations in display quality due to the absorption of red light by the transparent substrate, leading to undesirable color shifts and reduced display quality.
Innovation Solution
Incorporation of a selective reflective layer between the transparent substrates that reflects red light while transmitting blue and green light, maintaining the desired color balance and suppressing unwanted absorption in the transparent substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent substrate is used in the display panel, then light transmission is improved, but red light absorption occurs causing color shift and display quality degradation
Solution Approach 1:
A reflective layer is introduced as an intermediary component between the liquid crystal layer and the transparent substrate. This reflective layer selectively reflects red light wavelengths while allowing other wavelengths to pass through, thereby preventing the red light absorption issue caused by the transparent substrate while maintaining overall light transmission efficiency
Solution Approach 2:
The reflective layer is designed with specific optical properties to selectively reflect red light wavelengths. By changing the optical characteristics of the interface between the liquid crystal layer and the transparent substrate, the system achieves wavelength-selective reflection to compensate for the transparent substrate's tendency to absorb red light
2Adaptability or versatility
If polymer dispersed liquid crystals are used for switching, then scattering and transparent states are achieved, but display quality degradation occurs due to substrate absorption
Solution Approach 1:
The reflective layer serves as a mediator between the polymer dispersed liquid crystal layer and the transparent substrate. It compensates for the optical deficiencies introduced by the substrate absorption, ensuring that both scattering and transparent states maintain high display quality without color shifts
Solution Approach 2:
The reflective layer is positioned to preemptively counteract the harmful effect of red light absorption before it can degrade display quality. By reflecting red light at the interface, the system prevents the absorption issue from manifesting in the final display output
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 selective reflective layer maintains the desired color of the display by reflecting red light and minimizing absorption, thereby enhancing display quality and color accuracy.
Implementation Method 1
The selective reflective layer is configured to transmit light in a blue wavelength range and light in a green wavelength range and reflect light in a red wavelength range at a predetermined incident angle
Implementation Method 2
The selective reflective layer is configured to transmit light in a blue wavelength range and light in a green wavelength range and reflect light in a red wavelength range
Implementation Method 3
polymer dispersed liquid crystals capable of switching a scattering state of scattering incident light and a transparent state of transmitting incident light
Implementation Method 4
polymer dispersed liquid crystals capable of switching a scattering state of scattering incident light and a transparent state of transmitting incident light
Data Source
AI summary
According to one embodiment, a display device includes a display panel and a light source unit provided along an edge portion of the display panel. The display panel includes a first transparent substrate, a second transparent substrate, a liquid crystal layer sealed between the first transparent substrate and the second transparent substrate, a third transparent substrate facing the first transparent substrate, and a selective reflective layer located between the first transparent substrate and the third transparent substrate. The selective reflective layer is configured to transmit light in a blue wavelength range and light in a green wavelength range and reflect light in a red wavelength range at a predetermined incident angle relative to its normal.