Mirror Substrate with Continuous Layer for Display Haze Reduction
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Solution Overview
Problem
Display devices with mirror properties, such as OLED and LCD, face manufacturing and quality issues due to layered structures and pattern differences, leading to image haze and compromised display quality.
Innovation Solution
A display device with a mirror substrate featuring a continuous first mirror layer and mirror patterns on a transparent substrate, where the first mirror layer extends across both regions with and without mirror patterns, and a second mirror layer is added to enhance reflectivity and simplify manufacturing using a single halftone mask.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If layered structures or patterns having a reflective index are inserted to provide mirror property, then mirror property is achieved, but manufacturing process and display quality are adversely affected
Solution Approach 1:
The patent applies local quality by creating different mirror layer configurations in different regions of the display device. Specifically, the mirror substrate includes a first mirror layer extending continuously across the substrate and a second mirror layer extending only in non-emitting regions. This local differentiation allows the device to achieve mirror property where needed while maintaining display quality in emitting regions, thereby resolving the contradiction between manufacturing ease and display quality.
2Object-affected harmful factors
If mirror patterns are formed with structural differences between mirror region and neighboring region, then mirror property is provided, but display quality is compromised and image haze occurs
Solution Approach 1:
The patent implements local quality by configuring the second mirror layer to extend only in non-emitting regions and not in emitting regions. This creates a local distinction that prevents light scattering between emitting and non-emitting areas, thereby eliminating image haze while maintaining the mirror property in non-emitting regions. This resolves the contradiction by applying different structural characteristics to different local regions.
Solution Approach 2:
The patent segments the mirror layer structure into two distinct parts: a first mirror layer that extends continuously across the entire substrate, and a second mirror layer that extends only in non-emitting regions. This segmentation allows independent optimization of different regions - the continuous first layer provides baseline mirror property while the region-specific second layer enhances reflection in non-emitting areas without affecting emitting regions, thus preventing image haze.
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 reduces image haze and improves display quality by uniformly reflecting external light across both regions, while simplifying the manufacturing process and increasing productivity.
Implementation Method 1
the first mirror layer may include a plurality of first metal layers sequentially stacked on one another. The plurality of mirror patterns include a plurality of second metal layers sequentially stacked on one another
Data Source
AI summary
A display device may include a display unit disposed on a substrate and a mirror substrate facing the substrate with respect to the display unit. The mirror substrate may include a first mirror layer extending continuously on a surface of a transparent substrate and a plurality of mirror patterns on the first mirror layer. The first mirror layer is formed on both a region in which the plurality of mirror patterns are formed and a region in which the plurality of mirror patterns are not formed. External light is incident to and reflected by the first mirror layer, thus reducing an image haze and enhancing a display quality of the display device. In addition, the first mirror layer and the plurality of mirror patterns may be formed by using a single halftone mask to simplify the manufacturing process and increase a productivity of the mirror substrate.