Discharge Apparatus Optical Detection Shielding Reflection

The patent applies the principle of converting harm into benefit by using the light reflection that was previously causing measurement errors as a useful signal. The reflected light from the orifice surface is directed onto the light receiving element, and this reflection is used to detect the presence and position of ink droplets. By converting the harmful reflection into a beneficial detection mechanism, the system achieves accurate measurement without requiring complex shielding structures.

The patent introduces an intermediary element (a reflective surface or mirror) that mediates between the light emitting element and the orifice surface. This intermediary redirects the light path so that light emitted from the source reflects off the intermediary surface and then interacts with the orifice surface in a controlled manner. This allows the system to maintain close positioning for high sensitivity while managing reflection interference through the intermediary's light redirecting capability.

The patent implements a feedback mechanism where the optical detection system continuously monitors ink droplet discharge and uses this information to adjust discharge timing in real-time. The light emitting element and light receiving element provide feedback signals about droplet presence and position, which are processed by the control system to dynamically adjust timing parameters. This feedback loop maintains landing position accuracy while using computational algorithms rather than complex hardware, thus managing system complexity effectively.