| 摘要 |
A flashlight includes a main part, a light source, a switch, an LCD display, and a control device; the control device will measure the electricity content of the batteries with a result of the measurement being shown on the LCD display; the length of time the batteries will last is also shown on the LCD display; the switch can be displaced to either one of several different positions, and the control device will make the light source produce light in a manner according to the position of the switch, e.g. flashing on and off repeatedly, and keeping on shining; in other words, the flashing frequency and brightness of the light source can be changed with the help of the switch and the control device; the LCD display will show information about the way the light source is producing light at the same time.
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