Switchable Polarization Analyzer for Display Mode Selection
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Solution Overview
Problem
Liquid crystal display devices currently only offer a single anti-peeping display mode, limiting user selection and flexibility in display secrecy requirements.
Innovation Solution
A display device with a housing, display panel, and a polarization analyzing structure that allows switching between normal and anti-peeping display modes by controlling light analysis, using a polarizer on the incidence side and a movable polarization analyzer plate to cover or expose the active display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a polarization analyzing member is integrated into glasses for anti-peeping display mode, then information secrecy is improved, but display mode selection is reduced
Solution Approach 1:
The polarization analyzing structure is designed to be movable between a first position (covering the display panel for anti-peeping mode) and a second position (exposing the display panel for normal mode). This dynamic repositioning allows the display device to switch between different display modes, resolving the contradiction between information secrecy and display mode selection.
Solution Approach 2:
The polarization analyzing structure is separated from the display panel and placed on a cover body that can be independently positioned. This segmentation allows the polarization analyzing function to be selectively applied only when needed, enabling both anti-peeping mode and normal display mode without compromising information secrecy when required.
2Device complexity
If a polarizer is placed only on the light incidence side of the display panel, then device complexity is reduced, but the ability to achieve both display modes is limited
Solution Approach 1:
A movable polarization analyzing structure is introduced as an intermediary element between the user and the display panel. This structure can be positioned to either analyze the light emitted from the display panel (anti-peeping mode) or be moved away to allow direct viewing (normal mode), enabling mode switching without adding permanent complexity to the display panel itself.
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
Enables users to switch between two display modes, providing both direct image viewing in normal mode and secure anti-peeping mode by wearing additional polarization analyzer glasses, enhancing user selection and secrecy.
Implementation Method 1
a polarizer only on a light incidence side of the display panel, the polarizer being configured to polarize light to be incident into the display panel
Implementation Method 2
a polarization analyzing structure fitted onto the housing, and configured to selectively analyze light emitted out from an active display area of the display panel
Data Source
AI summary
A display device being switchable between a normal display mode and an anti-peeping display mode and a display system comprising the display device are disclosed. The display device comprises: a housing; a display panel mounted within the housing and provided with a polarizer only on a light incidence side thereof, the polarizer being configured to polarize light to be incident into the display panel; and a polarization analyzing structure fitted onto the housing, and configured to selectively analyze light emitted out from an active display area of the display panel so as to achieve a normal display mode, in which a user is able to directly view an image displayed in the display device, and anti-peeping display mode, in which the user is able to view the image displayed in the display device only by means of an additional polarization analyzer, of the display device.