| 摘要 |
PROBLEM TO BE SOLVED: To avoid a case wherein a light emission image seems distorted to a viewer owing to light emission display in a state wherein a light emission surface slants up or down. SOLUTION: It is judged that a housing 50 is shaken (step S1) when the absolute value ¾ω¾ of an angular velocity is larger than a threshold value (k), it is judged whether the housing 50 faces up or down (step S3) based upon normal acceleration of rotary motion of the housing 50, a tangential speed calculated, based on the tangential acceleration of the rotary motion, and the angular velocity, and cosθindicating the degree of inclination of the housing 50 in a direction that the light emission surface faces is calculated (step S4). A display size set to be smaller as the tilt angleθof the housing 50 is larger, is specified according to the degree cosθof inclination, data for light emission display for performing the light emission display is selected, based upon the display size, and the light emission display is performed, based on the data (steps S6 to S8). COPYRIGHT: (C)2007,JPO&INPIT
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