Infrared emission circuit, emission terminal of infrared remote control system and implementation method of emission terminal of infrared remote control system
A technology of infrared emission and circuit, applied in the field of emission end of infrared remote control system, can solve the problem that infrared light signal cannot achieve the emission effect, and achieve the effect of low cost
Active Publication Date: 2015-07-08
TIANJIA SHANGHAI INFO TECH
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Problems solved by technology
When the A application is applied to these smart electronic devices, the infrared light signals at the beginning and the end often cannot achieve a good emission effect
Method used
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[0072] see image 3 , which is the overall structure of the infrared emission circuit 30 of the present application, which includes:
[0073] ——The audio connector 31 includes at least four pins: left channel, right channel, microphone, and ground. Of the two pins of the left channel and the right channel, only one pin transmits the analog audio signal EarL, and the other pin does not transmit any signal or only transmits a mute signal (zero level). The analog audio signal EarL is composed of a sine wave and silence.
[0074] ——The square wave conversion circuit 32 amplifies the analog audio signal EarL transmitted by the left or right channel pin of the audio connector 31, and converts the analog audio signal EarL into two first square wave signals P1a, P1b, the high levels of the two first square wave signals are staggered from each other.
[0075] - Duty ratio conversion circuit 33, converting the two first square wave signals P1a, P1b output by the square wave conversio...
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The invention discloses an infrared emission circuit. The infrared emission circuit comprises an audio connector, a square wave conversion circuit, a duty ratio conversion circuit, an infrared light conversion circuit and a direct current power supply. Only one of a left channel and a right channel of the audio connector transmits analog audio signals, and the other one does not transmit any signal. The square wave conversion circuit amplifies single channel analog audio signals transmitted by the audio connector, the single channel analog audio signals are converted into two paths of first square wave signals, and the failing edge of the first path of first square wave signals and the rising edge of the second path of first square wave signals are mutually staggered. The duty ratio conversion circuit converts the two paths of the first square wave signals output by the square wave conversion circuit into two paths of second square wave signals with the constant duty ratio, and the high level of the first path of second square wave signals and the high level of the second path of second square wave signals are mutually staggered. The infrared light conversion circuit stacks and converts the two paths of the second square wave signals into infrared light conversion signals to send the infrared light conversion signals out. The invention further discloses an emission terminal of an infrared remote control system composed of the infrared emission circuit and an implementation method of the emission terminal of the infrared remote control system. The infrared emission circuit, the emission terminal of the infrared remote control system and the implementation method of the emission terminal of the infrared remote control system have the advantage of being wide in applicability.
Description
technical field [0001] This application relates to a transmitter of an infrared remote control system, in particular to an infrared transmitter circuit therein. Background technique [0002] The Chinese invention patent application with the application number 201310069854.0 and the application date of March 5, 2013 (hereinafter referred to as the A application) discloses a pluggable infrared emission circuit, which can be connected to smart electronic devices such as mobile phones and tablet computers through audio connectors. The headphone jack of the device is connected to form the transmitter of the infrared remote control system. [0003] see figure 1 , which is a typical embodiment of the transmitting end of the infrared remote control system disclosed in the A application, which consists of two parts: an intelligent electronic device 10 and an infrared transmitting circuit 20. [0004] The smart electronic device 10 includes: [0005] ——The man-machine interface 11 ...
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IPC IPC(8): H04B10/50H04B10/11G08C23/04
Inventor 张宇科王剑峰吴曙斌
Owner TIANJIA SHANGHAI INFO TECH