Display Apparatus Dual Processor Source State Detection

The processor is divided into a main processor and a sub-processor. The main processor handles full identification including video and clock signals when the display apparatus is on, while the sub-processor handles basic clock signal detection when in standby mode. This segmentation allows accurate state identification across different power states without requiring the full processing power continuously.

The sub-processor performs preliminary detection of the clock signal during standby mode to determine if a source device is connected and powered on. This preliminary action allows the system to quickly resume with accurate identification when the main processor is activated, without waiting for full signal analysis from scratch.

Before entering standby mode, the system stores connection state information in memory. The sub-processor continues to monitor clock signals during standby using minimal power. When resuming from standby, the system retrieves stored information and combines it with current detection results to quickly and accurately determine source device status without full power consumption.

The system continuously monitors clock signals and provides feedback about source device presence. During standby, the sub-processor provides minimal feedback on connection status. When the main processor activates, it receives this feedback and performs comprehensive verification, ensuring reliable detection while managing power consumption effectively.

Signal monitoring is segmented between processors based on power state. The sub-processor monitors only clock signals during standby (low power), while the main processor monitors both video and clock signals when fully active (high precision). This segmentation achieves accurate identification only when necessary, reducing overall energy consumption.

The system performs comprehensive signal monitoring periodically when the main processor is active, rather than continuously. During standby periods, minimal monitoring occurs. This periodic comprehensive monitoring combined with minimal interim monitoring maintains measurement precision when needed while significantly reducing average power consumption.