Hidden Display Layer With Light Shaping Diffuser Against Moire
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Solution Overview
Problem
Existing hidden display systems suffer from Moire interference and reduced image clarity and brightness due to optical interference between the display and the display hiding layer, particularly when in an active mode.
Innovation Solution
Incorporating a light shaping diffuser, such as a holographic or randomized micro lens array, between the display and the display hiding layer to reduce Moire interference and enhance image clarity and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a display hiding layer is placed over the display to hide it when inactive, then the display remains concealed, but Moire interference patterns appear and image clarity deteriorates when the display is active
Solution Approach 1:
A light shaping diffuser is introduced as an intermediary component between the display and the display hiding layer. This diffuser modifies the light paths from individual pixels, causing them to overlap and blend together when viewed through the hiding layer, thereby eliminating Moire interference patterns while maintaining image clarity.
Solution Approach 2:
The patent changes the optical parameters of light propagation by using a light shaping diffuser with specific diffusion characteristics. The diffuser has a full width at half maximum (FWHM) angle of about 20 degrees or less, which controls the angular distribution of light to prevent Moire patterns while preserving image sharpness.
2Object-affected harmful factors
If a display hiding layer is used to conceal the display, then the display is hidden when inactive, but image brightness is reduced when active
Solution Approach 1:
The light shaping diffuser acts as an optical mediator that efficiently directs light from the display through the hiding layer to the viewer. By controlling the angular distribution of light with a FWHM angle of about 20 degrees or less, it maximizes light transmission in the viewing direction while maintaining display concealment when inactive.
3Object-affected harmful factors
If a conventional hiding layer structure is used, then the display can be hidden, but the viewing angle is limited
Solution Approach 1:
The light shaping diffuser modifies the angular parameter of light emission with a controlled FWHM angle of about 20 degrees or less. This parameter optimization allows the display to maintain its hidden state when inactive while providing an adequate viewing angle when active, balancing concealment with viewability.
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 light shaping diffuser significantly minimizes Moire interference, maintaining or improving the viewing angle and image clarity, allowing viewers to see projected images with greater intensity and sharpness compared to conventional systems.
Implementation Method 1
a light shaping diffuser, such as a holographic or randomized micro lens array
Implementation Method 2
optical interference between the display and the display hiding layer
Implementation Method 3
the light shaping diffuser reduces the number of pixels that are altered due to an optical interference effect
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A hidden display system uses a light shaping diffuser (225) to limit the effects of scattering and interference, in particular Moire patterns, created when light projected from a display (230) is projected through a display hiding layer (220). The hidden display system has an active mode (201) and an inactive mode (200), wherein an observer sees only the display hiding layer (220) in an inactive mode.