Electronic device with clock correction function and clock correction method thereof

Abstract

Provided are an electronic device with a clock correction function and a clock correction method thereof. The clock in the electronic device comprises a clock generating unit, a clock correction unit and a clock display unit. The clock generating unit generates current time information. The clock correction unit receives a sound signal from a broadcast station and broadcasted by a radio, identifies a whole point timekeeping of the broadcast station according to the frequency of the sound signal, and compares the whole point of time corresponding to the whole point timekeeping with the time information generated by the clock generating unit. If the result of the comparison is inconsistent, the time information generated by the clock generating unit is corrected to the whole point of time broadcast by the broadcast station. The clock display unit displays the time information generated by the clock generating unit. The invention further provides a clock correction method. According to the invention, a time error caused by an accumulation of errors of clock elements in the clock is eliminated.

Description

technical field [0001] The invention relates to an electronic device with a clock correction function and a clock correction method thereof. Background technique [0002] With the development of user needs and technologies, various electronic devices are introduced to provide more convenience to users, such as digital photo frames, mobile phones, electronic watches, digital cameras, and the like. Most of today's electronic devices provide the function of displaying date and time. A real-time clock device for providing current time information generally includes: an oscillating part for providing a clock as a reference for calculating real-time information; a frequency division circuit for dividing and outputting the clock output by the above-mentioned oscillating part; receiving the frequency-divided clock, using The initial standard time information which is initially set calculates the time calculation part of the current time information; and the storage part stores the ...

AI Technical Summary

Problems solved by technology

The above-mentioned crystal oscillator has an error of about 20ppm in one cycle

In addition, since the above-mentioned clock element changes in characteristics due to temperature changes, the error of the clock is caused.

The above errors gradually superimpose with the accumulation of time, if not corrected in time, it will lead to errors in the time information of the clock

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