Charge status indicator

DETAILED DESCRIPTION This object is accomplished by a circuit arrangement for indicating the charge status of a battery in an electrical appliance, in which the circuit arrangement includes a voltage comparator with hysteresis for detecting the battery voltage, as well as an oscillator driven by the voltage comparator, and an indicating device.
The oscillator oscillates when the voltage is above a first threshold voltage and switches the indicating device to an active condition.
The oscillator is blocked when the voltage is below a second threshold voltage and switches the indicating device to the passive condition, with the absolute value of the first threshold voltage being greater than the absolute value of the second threshold voltage.
Particularly advantageously, such an arrangement can be used in a liquid crystal display (LCD) serving as indicating device on which a symbol is printed which is visible in the passive condition of the indicating device, signaling to the user that the accumulator (secondary battery) need to be recharged or that the battery (primary battery) need to be replaced.
Further advantageous embodiments are indicated in the subclaims and the description.
An embodiment of the present invention will be described in more detail in the following with reference to the accompanying drawings.
In the drawings ,