A processing circuit 4 is responsive to at least one conditional instruction to perform a conditional operation in dependence on a current value of a subset of at least one condition flag 22. In particular, the invention includes server and or client based applets which automatically informs viewers andor other receivers of digital images as to the state of color correction for a particular digital image, thus notifying a viewer of the visual integrity of the digital image being displayed. Additional status andor parametric information can be provided by the consumer in response to incoming infrared command signals. Then, cobalt is added in the aqueous solution of cobalt chloride, and an inert gas is injected into the solution with agitating, in order to convert the divalent copper ions contained in the aqueous solution of cobalt chloride to monovalent copper ions. When the illumination cell is assembled to the base, the supply circuit is electrically connected to the discharging circuit and the charging circuit respectively, so that the external power can drive the illumination cell projecting the illumination light beam and charge the power storage unit simultaneously.