Disclosed is a method of enhancing deposition of antidandruff active in infundibulum by applying a hair care composition comprising polyquaternium-6 and antidandruff agents. In another embodiment, the invention discloses pharmaceutical compositions comprising such compounds as well as methods of using them to treat disorders associated with the HCV protease. With such a structure, the light emitting element can be driven with a driving electric current equivalent to the writing electric current, irrespective of variations in characteristics of the transistors. The expressions are stored in an expression set table linking each element of each expression with a natural language phrase or data definition. This enables the operator to recognize the grasp in the operating state by not only visual judgment but also by hand.