Heating circuit, electronic apparatus, and method for entering operation mode in low-temperature environment
First Claim
1. A heating circuit used in connection with a plurality of electronic devices that are not activated, the heating circuit comprising:
- a plurality of thermal sensors arranged to respectively detect a temperature of a corresponding one of the electronic devices; and
a plurality of heaters arranged to respectively heat a corresponding one of the electronic devices; and
a controller programmed to;
obtain the temperature of each of the electronic devices respectively detected by the thermal sensors;
determine whether the temperature is lower than a threshold value; and
generate an enable signal for each heater corresponding to an electronic device having a temperature below the threshold value when the temperature of at least two electronic devices is lower than the threshold value, wherein an enable signal for each of the heaters comprises a continuous waveform generated while the temperature of the at least two electronic devices is lower than the threshold value and comprising an alternating sequence of high and low voltage levels, and wherein for the continuous waveform of a first one of the enable signals, each single low-voltage level begins and ends during a respective single high-voltage level of the continuous waveform of a second one of the enable signals, such that a pulse width of the second one of the enable signals when it reaches the high voltage level is wider than a pulse width of the first one of the enable signals at the low voltage level.
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Abstract
A method for entering an operation mode in a low-temperature environment is applicable in a situation that plural electronic devices in an electronic apparatus are not activated. Through performing the method, the electronic apparatus obtains a temperature of each electronic device after receiving a request of a user. Then the electronic apparatus determines whether the temperatures of all the electronic devices reach a threshold value. If the temperatures of at least two electronic devices do not reach the threshold value, the electronic apparatus generates a plurality of corresponding enable signals for the electronic devices having the temperatures lower than the threshold value. The waveforms of the enable signals vary alternately. The electronic apparatus transfers the enable signals to a plurality of corresponding heaters. Being activated by the received enable signal, each of the heaters heats the corresponding electronic device.
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Citations
17 Claims
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1. A heating circuit used in connection with a plurality of electronic devices that are not activated, the heating circuit comprising:
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a plurality of thermal sensors arranged to respectively detect a temperature of a corresponding one of the electronic devices; and a plurality of heaters arranged to respectively heat a corresponding one of the electronic devices; and a controller programmed to; obtain the temperature of each of the electronic devices respectively detected by the thermal sensors; determine whether the temperature is lower than a threshold value; and generate an enable signal for each heater corresponding to an electronic device having a temperature below the threshold value when the temperature of at least two electronic devices is lower than the threshold value, wherein an enable signal for each of the heaters comprises a continuous waveform generated while the temperature of the at least two electronic devices is lower than the threshold value and comprising an alternating sequence of high and low voltage levels, and wherein for the continuous waveform of a first one of the enable signals, each single low-voltage level begins and ends during a respective single high-voltage level of the continuous waveform of a second one of the enable signals, such that a pulse width of the second one of the enable signals when it reaches the high voltage level is wider than a pulse width of the first one of the enable signals at the low voltage level. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electronic apparatus, comprising:
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a processor and a plurality of electronic devices; a plurality of thermal sensors arranged to respectively detect a temperature of a corresponding one of the electronic devices; a plurality of heaters arranged to respectively heat a corresponding one of the electronic devices; and a controller programmed to; obtain the temperature of each of the electronic devices respectively detected by the thermal sensors before the electronic devices are activated; determine whether the temperature is lower than a threshold value; and generate an enable signal for each heater corresponding to an electronic device having a temperature below the threshold value when the temperature of at least two electronic devices is lower than the threshold value, wherein an enable signal for each of the heaters comprises a continuous waveform generated while the temperature of the at least two electronic devices is lower than the threshold value and comprising an alternating sequence of high and low voltage levels, and wherein for the continuous waveform of a first one of the enable signals, each single low-voltage level begins and ends during a respective single high-voltage level of the continuous waveform of a second one of the enable signals, such that a pulse width of the second one of the enable signals when it reaches the high voltage level is wider than a pulse width of the first one of the enable signals at the low voltage level. - View Dependent Claims (8, 9, 10, 11, 12, 14, 15)
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13. A method for entering an operation mode in a low-temperature environment, applicable in a situation when a plurality of electronic devices in an electronic apparatus are not activated, wherein the electronic apparatus comprises a plurality of heaters arranged to respectively heat a corresponding one of the electronic devices, the method comprising:
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after receiving a request, obtaining a temperature of each electronic device, wherein the request comprises an event of requiring the electronic apparatus to enter the operation mode; respectively determining whether temperature of each electronic device is lower than a threshold value; if the temperatures of at least two electronic devices are lower than the threshold value, generating an enable signal for each heater corresponding to an electronic device having a temperature below the threshold value, wherein an enable signal for each of the heaters comprises a continuous waveform generated while the temperature of the at least two electronic devices is lower than the threshold value and comprising an alternating sequence of high and low voltage levels, and wherein for the continuous waveform of a first one of the enable signals, each single low-voltage level begins and ends during a respective single high-voltage level of the continuous waveform of a second one of the enable signals, such that a pulse width of the second one of the enable signals when it reaches the high voltage level is wider than a pulse width of the first one of the enable signals at the low voltage level; respectively transferring the enable signals to the corresponding heaters; and respectively heating the electronic device corresponding to each heater receiving the enable signal according to the received enable signal. - View Dependent Claims (16, 17)
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Specification