Anti-Reflection Layer for Display Ghost Image Reduction
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Solution Overview
Problem
Display devices experience light interference issues due to external light reflection, leading to ghost images in areas with small light transmission regions, which existing technologies have not adequately addressed.
Innovation Solution
A display device with a substrate and pixel layer, featuring an anti-reflection layer comprising a first pattern of metals like molybdenum, aluminum, or titanium, and a second pattern of molybdenum oxide and other metals, such as tantalum or tungsten, to reduce external light reflection by absorbing it and preventing ghost images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light transmission region with small area is used to allow external light incident, then functional modules can detect objects, but light interference occurs and ghost images are generated due to external light reflection
Solution Approach 1:
The patent applies different transmittance characteristics to different regions of the display panel. The first region (transmission region) has higher transmittance to allow external light passage for functional modules, while the second region has lower transmittance to prevent light interference and ghost images. This local differentiation resolves the contradiction between enabling light transmission and preventing harmful reflections.
Solution Approach 2:
The patent converts the harmful effect of external light reflection into a beneficial structure by introducing a specific layer configuration (including MoO3 layer and organic insulating layer) that controls light reflection. The reflection that would normally cause ghost images is transformed into controlled light management that enables both transmission and interference prevention.
2Reliability
If external light passes through the light transmission region, then functional modules can recognize objects, but light interference occurs causing visual distortion
Solution Approach 1:
The patent creates local quality differences between regions: the first region maintains high transmittance for reliable object detection by functional modules, while the second region has reduced transmittance to eliminate light interference. This spatial differentiation ensures both detection reliability and interference prevention.
Solution Approach 2:
The patent introduces intermediary layers (MoO3 layer, organic insulating layer) between the light transmission region and functional modules. These intermediary layers mediate the light path, allowing external light to reach functional modules for reliable detection while blocking reflected light that would cause interference and visual distortion.
3Adaptability or versatility
If the display panel allows external light transmission for functional modules, then sensing capability is enabled, but ghost images appear due to light reflection
Solution Approach 1:
The patent implements local quality variation across the display panel, with the first region optimized for light transmission to enable functional module sensing capability, and the second region optimized for light blocking to prevent ghost images. This regional differentiation maintains sensing versatility while eliminating visual artifacts.
Solution Approach 2:
The patent transforms the harmful light reflection that causes ghost images into a controlled optical structure. By introducing specific layers (MoO3, organic insulating layer) with controlled optical properties, the reflection is converted into a design feature that enables both sensing capability and ghost image prevention.
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 anti-reflection layer effectively reduces external light reflection in the display device's transmission regions, preventing ghost images and enhancing user experience by minimizing light interference.
Implementation Method 1
an anti-reflection layer disposed on one side of the substrate in an area corresponding to the first region... the anti-reflection layer effectively reduces external light reflection in the display device's transmission regions, preventing ghost images and enhancing user experience by minimizing light interference
Data Source
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AI summary
A display device may include a display panel having a first region and a second region having a transmittance lower than a transmittance of the first region, the display panel including a substrate and a pixel layer disposed on the substrate, and an anti-reflection layer disposed on one side of the substrate in an area corresponding to the first region. The anti-reflection layer may include a first anti-reflection pattern including first metal and a second anti-reflection pattern disposed on the first anti-reflection pattern and including molybdenum oxide (MoOx) and oxide of second metal other than molybdenum.