An irradiating direction control apparatus includes an identifier for determining a difference in a load state of the vehicle corresponding to a passenger or carrying capacity. A pattern of a gate line, a gate electrode, a common electrode and a common electrode line is formed by patterning a first transparent conductive film and a first metal film formed successively on a transparent substrate. Due to charge sharing between capacitances, inefficiencies are introduced. The merging processing unit performs a merging operation on the tree-structured documents from correspondence information generated by the difference processing unit, based on the difference operation configuration information regarding the documents. The first converting unit compresses and maps image data to a virtual color reproduction range based on the selected one of the virtual color reproduction areas. The first cover and the second cover have a different coefficient of thermal expansion than the body.