Lock Confirmation Circuit for Synchronous Image Data Transmission
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Solution Overview
Problem
Large screen size televisions require multiple image data transmission chips to synchronize image data transmission accurately, necessitating a precise synchronous data transmission mechanism to ensure correct image display across different areas of the panel.
Innovation Solution
An image data transmission apparatus with a plurality of image data transmission circuits and a lock confirmation circuit that transmits training pattern signals and adjusts output pulse widths based on pulse width differences to determine frequency locking status, enabling synchronous data transmission with the image data reception apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple image data transmission chips are used for large screen size televisions, then the coverage area is improved, but the synchronization precision deteriorates
Solution Approach 1:
The patent implements preliminary action by transmitting training pattern signals before actual image data transmission to enable the reception apparatus to lock onto the transmission frequency in advance. This preliminary frequency locking ensures that when multiple transmission chips operate simultaneously, all chips and the panel are synchronized at the correct frequency, resolving the contradiction between covering large display areas and maintaining precise frequency synchronization.
2Measurement precision
If frequency locking is implemented for multiple image data transmission chips, then the synchronization accuracy is improved, but the system complexity increases
Solution Approach 1:
The patent applies feedback by having the reception apparatus transmit a lock confirmation signal back to the transmission apparatus after successfully locking the frequency. This feedback mechanism allows the transmission apparatus to verify whether frequency locking was successful and adjust accordingly. The feedback-based approach simplifies the overall synchronization mechanism by using a clear confirmatory signal rather than complex continuous adjustment systems.
Solution Approach 2:
The lock confirmation circuit acts as an intermediary between the transmission chips and the reception apparatus. It receives the lock confirmation signal from the reception apparatus and processes it to determine whether frequency locking was successful, then transmits this determination back to the transmission chips. This intermediary component simplifies the synchronization mechanism by centralizing the decision-making process and isolating the complexity from the individual transmission chips.
3Reliability
If pulse width threshold values are used to determine frequency lock status, then the reliability is improved, but the measurement precision deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the pulse width threshold values based on the specific transmission conditions and chip characteristics. Instead of using a fixed threshold, the system dynamically determines appropriate threshold values that balance reliability and precision. This allows the system to maintain high reliability in determining frequency lock status while avoiding the pitfalls of overly rigid threshold measurements.
Data Source
AI summary
The present invention discloses an image data transmission apparatus. The lock confirmation circuit receives an original signal having an original pulse width from the image data reception apparatus to generate an output signal. The image data transmission circuit determines that the image data reception apparatus locks a transmission frequency when an output pulse width is larger than a pulse threshold value to perform a synchronous image data transmission. The lock confirmation circuit sets the output pulse width to be a lengthened pulse width when a difference between the original pulse width and the pulse threshold value is smaller than a predetermined value and the original pulse width is not smaller than the pulse threshold value. The lock confirmation circuit sets the output pulse width to be a shortened pulse width when the difference is smaller than the predetermined value and the original pulse width is smaller than the pulse threshold value.