Multi-view Display Device Polarization Barrier Cross-talk Reduction
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Solution Overview
Problem
Existing multi-view display devices, particularly in automotive applications, suffer from small viewing angles and significant cross-talk between different views, which is undesirable for safety reasons, as it can lead to confusing information for passengers sitting between the driver's and passenger's viewing zones.
Innovation Solution
A multi-view display device is designed with a display panel having separately addressable pixels configured to emit light in different polarization states, combined with a barrier layer that selectively passes or occludes light based on polarization states to create large viewing angles and minimize cross-talk between adjacent views.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a barrier layer is used to create multiple viewing zones, then different views can be displayed for different users, but cross-talk occurs between adjacent viewing zones where information from multiple views is visible simultaneously
Solution Approach 1:
The patent applies local quality by making different regions of the display panel emit light in different polarization states. Specifically, first and second groups of pixels are configured to provide emergent light in first and second polarization states respectively, allowing different viewing zones to be created with distinct optical properties. This enables the barrier layer to selectively pass or occlude light based on polarization, thereby minimizing cross-talk between adjacent views while maintaining multi-view capability
Solution Approach 2:
The patent changes the polarization state parameter of light emitted by different pixel groups to resolve the cross-talk issue. By configuring pixels to emit light in different polarization states (first polarization state for one view, second polarization state for another view), the barrier layer can selectively transmit or block light based on its polarization orientation, thereby eliminating cross-talk between viewing zones while preserving multi-view functionality
2Illumination intensity
If the viewing angle between different views is increased, then each user can see their intended information more clearly, but the physical space required for the display increases
Solution Approach 1:
The patent achieves large viewing angles without increasing display area by changing the polarization state parameter of light from different pixel groups. The barrier layer, configured with regions that pass or occlude light based on polarization states, enables viewing angles of approximately 90° between different views. This polarization-based approach allows compact display geometry while maintaining wide viewing zones, as the selective light transmission is achieved through optical property modulation rather than physical spacing
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 achieves large viewing angles of approximately 90° between different views and small angles between adjacent views, with minimal cross-talk, enhancing the safety and usability of multi-view displays in vehicles by ensuring that information intended for one user is not visible to others.
Implementation Method 1
a first group of said pixels being configured to provide emergent light in a first polarisation state, and a second group of said pixels being configured to provide emergent light in a second polarisation state
Implementation Method 2
a barrier layer in optical association with the display panel to partially occlude said emergent light, the barrier layer having a first plurality of regions for passing light in one of the first or second polarisation states, and a second plurality of regions for passing light in the other of the first and second polarisation states
Data Source
AI summary
A display device includes a display panel having separately addressable pixels for displaying an image. A first pixel group of provides emergent light in a first polarization state, and a second pixel group provides emergent light in a second polarization state. A barrier layer in optical association with the display panel partially occludes the emergent light. The barrier layer has a first set of regions for passing light in one of the first or second polarization states, a second set regions for passing light in the other polarization state, and a third set of regions for occluding the emergent light. The first and second regions of the barrier layer are respectively registered with the first and second groups of pixels so as to provide different views of an image displayed by the display panel.