Deadfront Layer Stack for Hidden Displays Without Color Shift
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Solution Overview
Problem
Existing deadfronts for displays do not effectively hide display components when the display is not active, and they often compromise the brightness and color accuracy of the display.
Innovation Solution
A deadfront configuration that includes a transparent substrate with a neutral density filter and an ink layer, where the neutral density filter transmits at least 60% of incident light and the ink layer defines display and non-display regions with 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 the display is not active, then the display components are hidden effectively, but the brightness and color accuracy of the display are compromised
Solution Approach 1:
The deadfront is segmented into multiple functional layers: a transparent substrate, a neutral density filter layer, and an ink layer. Each layer performs a specific function - the transparent substrate provides structural support while maintaining light transmission, the neutral density filter reduces overall light intensity uniformly, and the ink layer creates contrast between display and non-display regions. This segmentation allows the system to hide display components effectively while preserving display brightness and color accuracy when active.
Solution Approach 2:
The ink layer is applied selectively to specific regions of the deadfront to create local quality differences. Display regions have no ink layer allowing full light transmission and color accuracy, while non-display regions have ink layer providing contrast for hiding components. This local differentiation enables effective component hiding without compromising overall display performance.
2Reliability
If a deadfront is used to hide display components when the display is not active, then the display components are hidden effectively, but the color accuracy of the display is compromised
Solution Approach 1:
The deadfront is segmented into multiple functional layers: a transparent substrate, a neutral density filter layer, and an ink layer. Each layer performs a specific function - the transparent substrate provides structural support while maintaining light transmission, the neutral density filter reduces overall light intensity uniformly, and the ink layer creates contrast between display and non-display regions. This segmentation allows the system to hide display components effectively while preserving display brightness and color accuracy when active.
Solution Approach 2:
The neutral density filter acts as an intermediary layer between the transparent substrate and the ink layer. It uniformly reduces light intensity across all regions before the light reaches the ink layer, preventing the ink layer from introducing color distortions that would affect display regions. This intermediary layer ensures that color accuracy is maintained in display regions while still achieving effective hiding in non-display regions.
3Illumination intensity
If a neutral density filter with high light transmission is used, then display brightness is maintained, but the contrast sensitivity between display and non-display regions is reduced
Solution Approach 1:
The ink layer is applied selectively to specific regions of the deadfront to create local quality differences. Display regions have no ink layer allowing full light transmission and color accuracy, while non-display regions have ink layer providing contrast for hiding components. This local differentiation enables effective component hiding without compromising overall display performance.
Solution Approach 2:
The deadfront uses a composite structure combining transparent substrate, neutral density filter, and ink layer. The neutral density filter provides uniform light transmission for brightness maintenance, while the ink layer adds selective absorption properties to create contrast sensitivity. This composite material approach allows simultaneous achievement of high display brightness and adequate contrast sensitivity between display and non-display regions.
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 inactive while maintaining the brightness and color accuracy of the display, ensuring a seamless user experience.
Implementation Method 1
a neutral density filter disposed on the second major surface of the transparent substrate... in which the deadfront transmits at least 60% of incident light
Implementation Method 2
an ink layer disposed on the neutral density filter... 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
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.