An electronic equipment case structure aims to provide bracing and cooling for an electronic element. Further, the current source is possible to be provided by a word line which is connected to gate of the transistor, and the switch is possible to be provided by bipolar junction transistor which is located between the capacitor and the current source. A column portion is provided between adjacent first inclined faces. Then, the correlation component extracted by the reducer is reduced from each of the acoustic signals. Next, when the backlight is turned off, the resolution of the original image is scaled down for obtaining an adjusted image data. The part of the land on the back surface has a width and the width is different in directions.