초록 ▼

A battery deterioration indicator has a plurality of indication regions indicating a battery life when a battery voltage falls to a voltage corresponding to a predetermined different voltage level. The indicator is capable of detecting the drop of the battery voltage which shows the battery deterior

A battery deterioration indicator has a plurality of indication regions indicating a battery life when a battery voltage falls to a voltage corresponding to a predetermined different voltage level. The indicator is capable of detecting the drop of the battery voltage which shows the battery deterioration and indicating in turn the deteriorating degrees of the battery in the order of from a smaller degree of deterioration to a larger. Accordingly, users may know the battery deterioration by seeing signs indicated on the indicator long enough before the battery life runs out to secure a replacement and at the same time may know how long the remaining battery life will last.

대표청구항 ▼

A battery deterioration indicator for an electronic desk calculator having display units including three column lines and three row lines for enabling a nine-segment display unit, seven of the segments being used to display a character and an eighth segment being used to display a decimal point, the

A battery deterioration indicator for an electronic desk calculator having display units including three column lines and three row lines for enabling a nine-segment display unit, seven of the segments being used to display a character and an eighth segment being used to display a decimal point, the indicator comprising: means for detecting the progressive deterioration of the voltage level of the battery, including first means for providing a limiting battery reference voltage level at exhaustion of battery voltage for normal operation of the calculator, at least one second means for providing at least one predetermined reference voltage representative of at least one stage of deterioration of the voltage level of the battery in advance of the limiting battery voltage level, and means for comparing the actual voltage level of the battery with said reference voltages and for providing individual signals indicative of the attained reference voltage levels; and means responsive to said comparing means for displaying the progressive deterioration of the voltage level of the battery including the remaining segment of each of a predetermined number of said display units for respectively indicating the receipt of an individual one of said signals, said remaining segments being arranged in the order of magnitude of said reference voltage levels.