Private Viewing Display System Using Frame Duplication and Synchronized Shutter Glasses
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Solution Overview
Problem
Existing systems for private viewing of multimedia contents on displays are not secure, versatile, or capable of maintaining image quality, particularly for motion pictures, as they suffer from display flicker and jerky images due to reduced frequency and alternating pixel multiplexing.
Innovation Solution
A system that incorporates a memory to record an original frame sequence at a first speed and duplicates it for signal modifying means to generate a compound image, using synchronized LCD shutters or filters to block modifying components, ensuring only the original image is visible, with a duplicating element operating at double the clock frequency to maintain image quality and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the original image signal frequency is reduced by 50% for multiplexing, then private viewing capability is achieved, but display flicker and jerky images occur
Solution Approach 1:
The patent applies periodic action by using synchronized LCD shutters that open and close at specific time intervals to block modifying color components. The shutters operate periodically in sync with the multiplexed signal, allowing original color components to pass through while blocking modifying components at alternating time periods, thus enabling private viewing without causing display flicker
Solution Approach 2:
The patent applies preliminary action by pre-synchronizing the LCD shutters with the multiplexed signal before display. The shutters are programmed in advance to open and close at the exact moments when original color components need to pass through, ensuring that the extraction of original image components occurs at the optimal time without causing flicker or jerky images
2Reliability
If LCD shutter glasses are used to block modifying components, then original image extraction is enabled, but additional power consumption occurs
Solution Approach 1:
The patent applies self-service by designing the LCD shutter glasses to automatically synchronize with the display signal without requiring additional power-consuming processing. The shutters respond passively to the timing of the multiplexed signal, using the display's own synchronization signal to control their operation, thereby enabling original image extraction with minimal additional power consumption
3Adaptability or versatility
If narrow-band filtered glasses are used to view first image, then wavelength-specific viewing is achieved, but security is compromised as anyone with glasses can view content
Solution Approach 1:
The patent applies dynamics by using time-varying LCD shutters that dynamically adjust their transparency in sync with the multiplexed signal. Unlike static narrow-band filtered glasses, the LCD shutters change their light-blocking properties over time, opening to allow original color components through at specific moments and closing to block modifying components, thereby providing both wavelength-specific viewing capability and enhanced security
4Reliability
If polarizing layer is removed from LCD display, then display becomes invisible without polarized glasses, but system is limited to LCD displays only
Solution Approach 1:
The patent applies universality by using a multiplexing system that can work with any display type (LCD, LED, plasma, etc.) rather than requiring modification of the display itself. The signal processing and synchronized LCD shutter glasses provide a universal solution that adapts to different display technologies, making the private viewing system versatile and not limited to LCD displays only
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 system provides secure, high-quality private viewing of multimedia contents on any display type, eliminating display flicker and jerky images, and is suitable for motion pictures by maintaining the original image quality through synchronized extraction of the original image components.
Implementation Method 1
said special eyewear comprises time-synchronized LCD shutters, variable polarizers or similar synchronized filters
Implementation Method 2
said special eyewear comprises time-synchronized LCD shutters, variable polarizers or similar synchronized filters
Data Source
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AI summary
The present invention relates to a system (1) for providing private viewing of multimedia contents, said system (1) comprising: - a display (2) comprising a plurality of pixels; - an image signal generator (3) which generates an original image signal representative of an original image to be displayed on said display (2), said original image signal comprising Red, Green and Blue colour data components; - signal modifying means (4) which mix, on a pixel-by-pixel basis, each original image signal transmitted from the image signal generator (3) with at least one corresponding modifying image signal component thereof, in order to generate a compound image signal representative of a compound image; - extracting means (5) for extracting said original image from said compound image displayed on the display (2). The invention is characterized in that said system (1) further comprises: - a memory (6) apt to receive and record an original frame sequence (N, N+l, N+2) corresponding to the original image signal generated by said image signal generator (3) at a first speed (FC) corresponding to a clock frequency; - a duplicating element (7) apt to read said memory (6) at a second speed (2FC) corresponding to a speed which is the double of said clock frequency (FC), said duplicating element (7) being apt to duplicate said original frame sequence (N, N+l, N+2) in order to send to said signal modifying means (4) a first [2N, 2(N+1), 2(N+2)] and a second type of frame sequence [2N\ 2(N'+1), 2(N'+2)].