Touch Panel Buffer Memory Interrupt Mode Control

The patent implements periodic action by having the analog to digital converter and operating control unit operate in alternating active and sleep modes. The converter processes data in batches during active periods, then enters sleep mode to conserve power, rather than continuously operating. This periodic operation pattern maintains touch detection functionality while significantly reducing average power consumption.

The patent applies preliminary action by accumulating analog data in a buffer memory before triggering the analog to digital converter. When the buffer reaches a threshold level, the converter is activated to process the accumulated data in batch. This preliminary accumulation approach allows the system to remain in low-power state longer while still maintaining responsive touch detection capability.

The system uses periodic action by switching the analog to digital converter between active and sleep modes based on buffer threshold conditions. During sleep mode, power is conserved to extend standby time. When the buffer accumulates sufficient data, the converter activates periodically to process data in batches, maintaining accurate touch event detection without requiring continuous operation.

The buffer memory serves as an intermediary between the touch panel and the analog to digital converter. It accumulates analog data and triggers converter activation only when the buffer reaches a threshold level. This intermediary mechanism allows the converter to operate intermittently rather than continuously, extending standby time while maintaining detection accuracy through batch processing of accumulated data.

The patent merges the data transfer operations by implementing batch processing. Multiple digital data points accumulated in the buffer are processed together in a single converter activation cycle, rather than transferring and processing each data point individually. This merging of operations completes all necessary data processing while minimizing the number of times the converter and control unit must activate, thereby reducing unnecessary power consumption.

The control device applies periodic action by enabling the analog to digital converter only when the buffer reaches a threshold level, rather than maintaining continuous data transfer operations. The converter activates periodically to process accumulated data batches, ensuring complete and accurate data processing while significantly reducing the frequency of power-consuming transfer operations between the control unit and converter.