Deadfront Optical Layering for Hidden Displays and Color Matching
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Solution Overview
Problem
Existing deadfronts for displays do not effectively hide display components when the display is off, and they can distort colors and diminish brightness.
Innovation Solution
A deadfront configuration that includes a transparent substrate with a neutral density filter and an ink layer, allowing at least 60% of incident light to be transmitted in display regions and no more than 5% in non-display regions, achieving a contrast sensitivity of at least 15 when the display is not active.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a deadfront is used to hide display components when off, then the display components are hidden, but the deadfront distorts colors and diminishes brightness
Solution Approach 1:
The deadfront is divided into multiple regions: a first region with a first optical density and a second region with a second optical density. This segmentation allows different parts of the deadfront to have different light transmission properties, enabling effective hiding of display components in non-display areas while maintaining brightness and color accuracy in display areas.
Solution Approach 2:
Different regions of the deadfront are assigned different optical densities tailored to their specific functions. The first region (display area) has optimized optical density to maintain brightness and color accuracy, while the second region (non-display area) has higher optical density to effectively hide display components when off.
2Illumination intensity
If the deadfront transmits more light in non-display regions, then brightness is improved, but display components become visible when the display is off
Solution Approach 1:
The deadfront implements local quality by assigning different optical densities to different regions. The second region (non-display region) has a specific optical density that allows sufficient light transmission for brightness while maintaining adequate hiding effectiveness, distinct from the first region's optical density.
Solution Approach 2:
The patent optimizes the optical density parameter of the second region to achieve a balance between light transmission and hiding effectiveness. By carefully selecting the optical density value for the non-display region, sufficient brightness is maintained while display components remain hidden when the display is off.
3Ease of manufacture
If the deadfront uses uniform optical density across all regions, then manufacturing is simplified, but color distortion and brightness diminishment occur
Solution Approach 1:
The deadfront employs local quality by implementing regions with different optical densities. The first region has optical density optimized for color accuracy and brightness in display areas, while the second region has optical density optimized for hiding effectiveness in non-display areas, improving overall performance despite increased manufacturing complexity.
Solution Approach 2:
The deadfront can be implemented as a composite structure with different materials or material treatments in different regions. This allows each region to have tailored optical properties (different optical densities) to meet specific functional requirements while maintaining overall structural integrity.
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 hides display components when off, maintains the brightness and color accuracy of the display, and allows for easy viewing when the display is active.
Implementation Method 1
The deadfront transmits at least 60% of incident light in display regions
Implementation Method 2
The deadfront transmits at most 5% of incident light in non-display regions
Implementation Method 3
The ink layer includes an ink having a reflection coefficient of less than 5%
Data Source
AI summary
Embodiments of a deadfront configured to hide a display when the display is not active are provided. The deadfront includes a substrate having a first major surface and a second major surface. The second major surface is opposite the first major surface. The deadfront also includes a neutral density filter disposed on the second major surface of the transparent substrate and an ink layer disposed on the neutral density filter. The deadfront defines at least one display region in which the deadfront transmits at least 60% of incident light and at least one non-display region in which the deadfront transmits at most 5% of incident light. A contrast sensitivity between each of the at least one display region and each of the at least one non-display region is at least 15 when the display is not active.