| 摘要 |
<p>PURPOSE:To prevent malfunction caused by heat generation by suppressing the quantity of generated heat without using any parts such as a temperature sensor or a cooler, which requires space and cost, by suppressing the quantity of generated heat by arithmetically estimating the temperature and controlling the operating mode of an electronic equipment. CONSTITUTION:A temperature control circuit is composed of a temperature estimating means 1 for estimating the temperature of an object range 5 by integrating the quantity of heat by inputting operating mode information (m) and operating time (t) related to the generated heat quantity of the object range 5, temperature limit deciding means 2 for judging whether the estimated temperature reaches a previously decided critical value or not, and control means 3 for indicating the change of the operating mode when the estimated temperature reaches the critical value. The electronic equipment is provided with an operating mode setting part 6 for changing the operating state of the object range 5 as the main factor of heat generation and a clock mechanism 7. The operating mode information (m) and the operating time (t) are fetched from those circuits 6 and 7. By setting a lot of operating mode and successively changing them in the order of generated heat quantity, the reduction of performance can be decreased.</p> |
