Printer Ink Level Detection Using Light Source Correction

The patent applies parameter changes by introducing correction parameters that adjust the relationship between light amount and output values. The correction parameter is determined based on the actual output value from the light receiver when a specific light amount is incident, allowing the system to compensate for manufacturing variations in the light emitter and light receiver. This dynamic adjustment of detection parameters maintains high accuracy despite component variations.

The patent implements feedback by using the actual output value from the light receiver to determine the correction parameter. The system continuously monitors the relationship between incident light amount and received light amount, and adjusts the correction parameter accordingly. This feedback mechanism ensures that detection accuracy is maintained by compensating for any deviations caused by manufacturing variations or environmental changes.

The patent applies self-service by enabling the detection system to automatically determine and store its own correction parameters without requiring external calibration or manual adjustment. The light emitter and light receiver perform self-characterization by measuring their actual performance, and the correction parameter is automatically generated and stored in non-volatile memory. This self-service approach simplifies the overall system complexity while maintaining high detection accuracy.

The patent implements preliminary action by pre-determining the correction parameter during manufacturing or initial setup, before actual ink level detection begins. The correction parameter is stored in non-volatile storage so that it is readily available for use during normal operation. This preliminary characterization eliminates the need for complex real-time calibration procedures during ink level detection.