Telephone incoming call prompt automatic switching method and telephone set
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HISENSE
- Publication Date
- 2008-04-09
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention belongs to the technical field of communication equipment, and in particular relates to a method capable of realizing automatic conversion of a telephone call prompt mode and a telephone set using the method. Background technique
[0002] The human body has a constant body temperature, generally around 37 degrees, and emits infrared rays with a specific wavelength of about 10 μm. The infrared detector works by detecting the infrared rays emitted by the human body around 10 μm. The 10μm infrared rays emitted by the human body are enhanced by the Fresnel filter and then gathered on the infrared sensing source. Infrared induction sources usually use pyroelectric elements, which will lose their charge balance when they receive changes in the infrared radiation temperature of the human body, release charges to the outside, and then convert them into voltage signals for output, so that the presence of the human body can be detected. And send o...