Liquid Crystal Display Private Viewing via Polarized Glasses
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Solution Overview
Problem
Existing LCD systems cannot provide a private display for specific users, as they typically show content to all users in front of the device or display different content for multiple users simultaneously.
Innovation Solution
An LCD system incorporating a backlight module, an LCD panel with a first polarizer, liquid crystal layer, and color film substrate, along with polarized glasses featuring a second polarizer and a controller to control the polarized light axis direction, allowing only authorized users to view the display by filtering out unwanted light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an existing LCD device displays content to all users in front of the device, then the display is accessible to multiple users, but private display for specific users cannot be achieved
Solution Approach 1:
The patent introduces polarized glasses as an intermediary device between the LCD display and the user's eye. The glasses include a second polarizer that works with the first polarizer in the LCD panel to selectively transmit light only to users wearing the glasses, thereby enabling private display without fundamentally redesigning the LCD system architecture
Solution Approach 2:
The patent changes the polarization state parameter of light by incorporating a second polarizer in the polarized glasses. By controlling the polarization direction of the second polarizer to be perpendicular to the first polarizer when display is active, the system selectively transmits or blocks light based on the user's viewing condition (wearing glasses or not), thus achieving private display capability
2Adaptability or versatility
If a second polarizer is added to enable private display, then private viewing is achieved, but the system structure becomes more complex
Solution Approach 1:
The second polarizer in the polarized glasses serves as an intermediary component that enables private display functionality without requiring complex internal modifications to the LCD panel structure. This external addition maintains relative system simplicity while achieving the desired privacy function
Solution Approach 2:
The LCD system is designed to serve multiple functions: it can display content publicly when the second polarizer is parallel to the first polarizer, and privately when perpendicular. This multi-functionality is achieved through a relatively simple configuration change in the polarizer orientation, avoiding the need for completely separate display systems
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 a private display for specific users wearing the polarized glasses by ensuring the polarized light axis of the second polarizer is perpendicular to the first polarizer's axis when the display is active, effectively blocking the display from unauthorized viewers.
Implementation Method 1
a first polarizer for converting the emitting light of the backlight module into a linearly polarized light
Implementation Method 2
a liquid crystal layer for optically rotating the linearly polarized light emitted by the first polarizer
Implementation Method 3
a second polarizer for converting the emitting light of the LCD panel into a display light
Data Source
AI summary
A liquid crystal display system is provided. The liquid crystal display system includes a backlight module, an LCD panel, and polarized glasses. The LCD panel includes a first polarizer, a liquid crystal layer, an array substrate, and a color film substrate. The polarized glasses include a second polarizer. The direction of the polarized light axis of the second polarizer is perpendicular to the direction of the polarized light axis of the first polarizer when the polarized glasses are used for displaying the display picture of the LCD panel. A private display can be performed for specific users by the present invention.