Touch Insulation and Reflection Layers for Low-Glare Displays
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Solution Overview
Problem
Existing display devices face challenges in improving light efficiency and visibility, particularly in reducing external light reflection and enhancing transmittance.
Innovation Solution
A display device incorporating a touch insulation layer with a colorant and a reflection adjustment layer, featuring non-polarized and polarized adjustment portions, is designed to selectively transmit and absorb light, thereby reducing external light reflection and enhancing light efficiency and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch sensing layer is added to enable touch functionality, then touch capability is improved, but external light reflection increases and visibility deteriorates
Solution Approach 1:
A reflection adjustment layer is introduced as an intermediary component between the touch sensing layer and the external environment. This layer contains liquid crystal compounds that can adjust the polarization state of reflected light, thereby reducing the harmful reflection effect while preserving the touch sensing layer's functionality.
Solution Approach 2:
The reflection adjustment layer utilizes liquid crystal compounds whose optical properties (polarization state) can be changed by applying voltage. By controlling the polarization parameters of the liquid crystals, the system can dynamically adjust light reflection characteristics to reduce visibility deterioration while maintaining touch capability.
2Adaptability or versatility
If conventional touch insulation layers are used, then touch sensing functionality is achieved, but light efficiency and color purity are reduced
Solution Approach 1:
The touch insulation layer is constructed using a composite material system combining transparent resin base materials with specific colorants. This composite structure allows the layer to maintain its electrical insulation function for touch sensing while optimizing optical properties to improve light efficiency and color purity of the displayed image.
3Reliability
If the touch insulation layer covers all light-emitting regions, then electrical insulation is improved, but color purity and light efficiency deteriorate
Solution Approach 1:
The touch insulation layer is designed with spatially varying properties: it is formed only in non-light-emitting regions (such as pixel electrode regions and connection regions) while deliberately excluding light-emitting regions. This local differentiation allows electrical insulation to be provided where needed without compromising the color purity and light efficiency of the displayed image.
4Object-affected harmful factors
If a reflection adjustment layer with liquid crystals is added, then external light reflection is reduced, but device complexity increases
Solution Approach 1:
The reflection adjustment layer serves multiple functions simultaneously: it acts as both a reflection reduction layer and an optical control layer. The liquid crystal compounds in this layer can adjust not only reflected light but also work in conjunction with the touch insulation layer to enhance overall display performance, thereby justifying the added structural complexity through multi-functionality.
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 improves color purity and reduces external light reflection, resulting in enhanced light efficiency and visibility of the display device.
Implementation Method 1
the touch insulation layer may be configured to selectively transmit the light of the first wavelength band
Implementation Method 2
The first adjustment portion may include liquid crystals, and the second adjustment portion may include the liquid crystals and a dichroic dye
Implementation Method 3
the second adjustment portion may include the liquid crystals and a dichroic dye
Data Source
AI summary
A display device may include a display panel, a touch sensing layer, and a reflection adjustment layer. The touch sensing layer may include a touch insulation layer. The touch insulation layer may include a colorant and may cover a first light-emitting region. The reflection adjustment layer may be disposed on the touch sensing layer. The reflection adjustment layer may include a first adjustment portion which is non-polarized and a second adjustment portion which is polarized. The first adjustment portion may cover the first light-emitting region, and the second adjustment portion may cover a second light-emitting region. The display panel may be configured to emit light of a first wavelength band through the first light-emitting region, and the touch insulation layer may be configured to selectively transmit light of the first wavelength band.