Printhead Substrate Temperature Control for Energy Efficiency

The patent applies local quality by setting different target temperatures for different head units based on their individual temperature detection results. Instead of uniformly setting a high target temperature for the entire head, each head unit receives a customized target temperature that reflects its local thermal conditions, thereby reducing overall power consumption while maintaining print quality.

The patent segments the printhead into multiple independently controlled head units, each with its own temperature detection and control. This segmentation allows the system to optimize temperature control on a per-unit basis rather than treating the entire head as a single entity, enabling localized temperature management that reduces total power consumption.

The patent implements local quality by allowing each head unit to have its own target temperature setting based on its detected temperature, rather than forcing all units to maintain the highest temperature. This approach maintains temperature uniformity within each local unit while avoiding the need to keep the entire head at high temperature, thus resolving the contradiction between uniformity and overall temperature level.

The patent applies dynamics by making the target temperature adjustable and adaptive for each head unit based on real-time temperature detection. Instead of a static high temperature setting, the system dynamically adjusts target temperatures to match actual thermal conditions, allowing the head to maintain uniformity without permanently staying in a high temperature state.