Disclosed is a method to convert a Unicode character. The threshold value is a predetermined ratio of a peak value of the output signal of the optical sensor. In order to overcome the above problem, even in the stage before joining the wavelength conversion element to the solid-state laser element, the invention enables the semiconductor laser and the solid-state laser element to be joined by properly adjusting the relative position of the laser and the laser element. Therefore, electricity may be supplied to the conductive strips of the frame. The second substrate layer includes a portion corresponding to a second part of a first interlaced element and a second part of a second interlaced element. After a plurality of information items from the plurality of equipment items has been acquired and a context has been determined according to a predetermined model, the plurality of information items is filtered according to at least one rule, the at least one rule being associated with the context for selection of at least one information item.