Beacon device and control method thereof

1. A beacon device, comprising: an antenna; a low-power RF (Radio Frequency) device, generating an RF signal, wherein the antenna transmits the RF signal outwardly;

a light sensor, detecting intensity of light nearby, and generating a detection signal;

a microprocessor, controlling an operation mode of the low-power RF device according to the detection signal; and a battery, supplying electric power to the low-power RF device, the light sensor, and the microprocessor; wherein the low-power RF device operates in a work mode or an idle mode; wherein when the low-power RF device does not operate in the idle mode, RF power of the low-power RF device is adjusted according to the intensity of light; wherein the RF power is adjusted according to the following equation: P=x*(b+n) wherein P represents the RF power, x represents a minimum RF power, b represents a base number, and n represents a level of the intensity of light.

2. The beacon device as claimed in claim 1 , wherein the RF signal is a Bluetooth signal, and the low-power RF device supports a Bluetooth 4.0 standard and a unilateral broadcast function.

3. The beacon device as claimed in claim 1 , wherein in the work mode, the low-power RF device broadcasts the RF signal at intervals, and wherein in the idle mode, the low-power RF device stops broadcasting the RF signal so as to reduce power consumption of the battery.

4. The beacon device as claimed in claim 1 , wherein the microprocessor determines whether the intensity of light reaches a threshold value, and controls the low-power RF device to operate in the work mode or the idle mode accordingly.

5. The beacon device as claimed in claim 1 , wherein when the intensity of light is relatively strong, the low-power RF device operates in the work mode, and wherein when the intensity of light is relatively weak, the low-power RF device operates in the idle mode.

6. The beacon device as claimed in claim 5 , wherein when the intensity of light is relatively moderate, the low-power RF device further operates in a special work mode, and wherein in the special work mode, the low-power RF device has relatively long intervals for generation of signals and relatively moderate RF power.

7. The beacon device as claimed in claim 1 , wherein when the intensity of light is relatively strong, the low-power RF device operates in the idle mode, and wherein when the intensity of light is relatively weak, the low-power RF device operates in the work mode.

8. The beacon device as claimed in claim 7 , wherein when the intensity of light is relatively moderate, the low-power RF device further operates in a moderate work mode, and wherein in the moderate work mode, the low-power RF device has relatively moderate RF power.

9. A control method for controlling a beacon device, comprising the steps of:

detecting intensity of light nearby and generating a detection signal by a light sensor;

controlling an operation mode of a low-power RF (Radio Frequency) device by a microprocessor according to the detection signal; generating an RF signal by the low-power RF device; and transmitting the RF signal outwardly by an antenna; wherein a battery supplies electric power to the light sensor, the microprocessor, and the low-power RF device; wherein the low-power RF device operates in a work mode or an idle mode; wherein the control method further comprises: when the low-power RF device does not operate in the idle mode, adjusting RF power of the low-power RF device by the microprocessor according to the intensity of light;

wherein the RF power is adjusted according to the following equation:

P=x *( b+n )

wherein P represents the RF power, x represents a minimum RF power, b represents a base number, and n represents a level of the intensity of light.

10. The control method as claimed in claim 9 , wherein the RF signal is a Bluetooth signal, and the low-power RF device supports a Bluetooth 4.0 standard and a unilateral broadcast function.

11. The control method as claimed in claim 9 , wherein in the work mode, the low-power RF device broadcasts the RF signal at intervals, and wherein in the idle mode, the low-power RF device stops broadcasting the RF signal so as to reduce power consumption of the battery.

12. The control method as claimed in claim 9 , further comprising:

determining whether the intensity of light reaches a threshold value, and controlling the low-power RF device to operate in the work mode or the idle mode by the microprocessor accordingly.

13. The control method as claimed in claim 9 , wherein when the intensity of light is relatively strong, the low-power RF device operates in the work mode, and wherein when the intensity of light is relatively weak, the low-power RF device operates in the idle mode.

14. The control method as claimed in claim 13 , wherein when the intensity of light is relatively moderate, the low-power RF device further operates in a special work mode, and wherein in the special work mode, the low-power RF device has relatively long intervals for generation of signals and relatively moderate RF power.

15. The control method as claimed in claim 9 , wherein when the intensity of light is relatively strong, the low-power RF device operates in the idle mode, and wherein when the intensity of light is relatively weak, the low-power RF device operates in the work mode.

16. The control method as claimed in claim 15 , wherein when the intensity of light is relatively moderate, the low-power RF device further operates in a moderate work mode, and wherein in the moderate work mode, the low-power RF device has relatively moderate RF power.