Time-Multiplexed Video Signal Coexistence System
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Solution Overview
Problem
Existing on-screen display menu systems obscure the original picture when activated, and transparent on-screen display circuits are expensive due to complex design requirements, limiting the ability to simultaneously display multiple video signals effectively.
Innovation Solution
A multiple video signals coexisting system using switches, a microcontroller, and a pixel clock generator to alternate output of video signals based on synchronization signals, allowing for the simultaneous display of multiple video signals or a translucent on-screen display menu.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a transparent on-screen display circuit is used to show the menu translucently, then the user can see the whole picture and obtain information simultaneously, but the circuit design becomes much more complicated and the cost increases significantly
Solution Approach 1:
The patent segments the display output by dividing the video signal into different time intervals. During odd scanning lines, the first video signal is output, while during even scanning lines, the second video signal (containing menu information) is output. This temporal segmentation allows both the original picture and menu to be displayed simultaneously without requiring a transparent display circuit, thus reducing circuit complexity while maintaining ease of operation.
Solution Approach 2:
The patent implements periodic action by alternating between displaying the first video signal and the second video signal in a regular pattern throughout the scanning process. The system periodically switches between the original picture and menu information based on scanning line numbers, creating a rhythmic display pattern that allows both signals to coexist on the same display without requiring complex transparent circuitry.
2Adaptability or versatility
If multiple displays are prepared to show multiple pictures simultaneously, then each picture can be displayed clearly, but the system becomes more complex and expensive
Solution Approach 1:
The patent merges multiple video signals onto a single display by time-multiplexing them. Instead of using separate displays for different pictures, the system combines the first video signal and second video signal into one display output, switching between them based on scanning line numbers. This merging approach maintains the ability to display multiple pictures simultaneously while reducing the number of physical displays required, thereby lowering system complexity and cost.
Solution Approach 2:
The patent makes the single display universal by enabling it to perform multiple functions: displaying the original picture, displaying the menu, and displaying both simultaneously through time-division. The display serves as a multi-functional device that can handle different video signals without requiring additional dedicated displays, thus improving adaptability while reducing device complexity.
3Illumination intensity
If the on-screen display menu is set at the centre of the display, then the menu is prominently visible, but the user cannot see the whole picture to obtain information
Solution Approach 1:
The patent segments the display time into different intervals corresponding to different scanning lines. During odd scanning lines, the original picture is displayed, while during even scanning lines, the menu is displayed. This temporal segmentation allows both the menu (at centre position) and the whole picture to be visible at different times, eliminating the information loss problem while maintaining prominent menu visibility.
Solution Approach 2:
The patent uses periodic action to alternate between displaying the picture and the menu in a regular scanning pattern. The menu is displayed periodically during even scanning lines while the picture is displayed during odd scanning lines. This periodic display ensures that the menu remains prominently visible at the centre position while the user can still access the whole picture information through the alternating display pattern.
Data Source
AI summary
Disclosed is a multiple video signals coexisting system and method thereof. The multiple video signals coexisting system includes a second switch and a first switch. The first switch outputs a portion of a first video signal and a portion of a second video signal from a plurality of video signals alternately as multiple coexisting video signals according to a selecting signal. The second switch generates the selecting signal according a toggle signal. The multiple video signals coexisting system further includes a pixel clock generator to generate a pixel clock and the second switch can employ the pixel clock to generate the selecting signal thereafter. The multiple video signals coexisting system outputs the multiple coexisting video signals for constituting continuous frames on a display, therefore, to show plural pictures on single display, and more particularly, to show an on-screen display menu translucently on the display.