| 摘要 |
PURPOSE: To prevent temperature rise in a housing board and to prevent visibility by using an incident-light control member, whose transparency is changed by current conduction, for the glass window of the housing board, switching transparence and opacity of the window glass by the change in brightness around the board and a touch sensor, and shielding the incident light through the window. CONSTITUTION: The switching of the transparence and opacity of a glass window 2 is controlled with a first control part 4 and a second control part 6. The first control part 4 turns on the current conduction to an incident-light control member when the surrounding part is bright in correspondence with the brightness of the surrounding part detected with a brightness detecting part 3, and the window 2 is made opaque. When the surrounding part is dark, the current conduction is turned off, and the window is made transparent. The second control part 6 touches a touch sensor 5 when the window 2 is made transparent, turns off the current conduction to the incident-light control member constituting the window 2 and switches the member to transparence. When a person touches the touch sensor 5, the second control part 6 turns off the current conduction for the specified time by a timer, and the window 2 is made transparent. Thus, the rise of the inner temperature is prevented, and the inner part is readily inspected. |
