Non-touch control apparatus and control method thereof

Patent metadata

Field	Value
Publication number	US-10042428-B2
Application number	US-201615160512-A
Country	US
Kind code	B2
Filing date	May 20, 2016
Priority date	May 28, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

An embodiment of the present disclosure provides a non-touch control apparatus, including: a main control integrated circuit, an ultrasonic generating circuit, a first transducer device and a second transducer device, wherein the main control integrated circuit is configured to, in response to a condition that the device is in a non-touch control mode, switch on the ultrasonic generating circuit so as to control the second transducer device to send out a first acoustic wave signal, the first transducer device is configured to be capable of receiving a second acoustic wave signal including the first acoustic wave signal, converting the second acoustic wave signal into a first electric signal, and outputting the first electric signal, wherein, the main control integrated circuit is configured to be capable of receiving a second electric signal derived from the first electric signal.

First claim

The invention claimed is:

1. A non-touch control apparatus, comprising: a main control integrated circuit, an ultrasonic generating circuit, a first transducer device and a second transducer device, wherein
the main control integrated circuit is configured to, in response to a condition that the apparatus is in a non-touch control mode, switch on the ultrasonic generating circuit so as to control the second transducer device to send out a first acoustic wave signal, the ultrasonic generating circuit is a low-power-consumption ultrasonic generating circuit,
the first transducer device is configured to be capable of receiving a second acoustic wave signal including the first acoustic wave signal, converting the second acoustic wave signal into a first electric signal, and outputting the first electric signal, the first electric signal is an analog signal, wherein, the main control integrated circuit is configured to be capable of receiving a second electric signal derived from the first electric signal,
wherein, the non-touch control apparatus further comprises:
an amplifying and filtering circuit, configured to receive the first electric signal output by the first transducer device, perform amplification, filtering and analog-to-digital conversion processing for the first electric signal, and output a third electric signal, wherein the third electric signal is digital signal, and the second electric signal is derived from the third electric signal, and
a signal processing device, configured to receive the third electric signal output by the amplifying and filtering circuit and process the third electric signal into the second electric signal for output, wherein, the second electric signal is digital signal, and power of the second electric signal is lower than that of the third electric signal,
wherein the main control integrated circuit is configured to, in response to the condition that the apparatus is in a loudspeaker mode, send an audio to the signal processing device, and the signal processing device is configured to output the audio by the first transducer device and/or the second first transducer device after carrying out amplifying processing for the audio;
the low-power-consumption ultrasonic generating circuit, in response to the condition that the apparatus is in the non-touch control mode, controls the at least one second piezoelectric ceramic device of the second transducer device to generate and send the first acoustic wave signal; the first acoustic wave signal includes an ultrasonic wave with a preset frequency; the at least one first piezoelectric ceramic device of the first transducer device is configured for receiving the second acoustic wave signal, converting the second acoustic wave signal into the first electric signal and sending the first electric signal to the amplifying and filtering circuit; the amplifying and filtering circuit is configured for forming the third electric signal after processing the first electric signal, and sending the third electric signal to the signal processing device; the signal processing device is configured for forming the second electric signal after processing the third electric signal, and sending the second electric signal to the main control integrated circuit; the main control integrated circuit is configured for judging whether an ultrasonic electric signal is included in the second electric signal, in response to a result that the ultrasonic electric signal is included the second electric signal, comparing whether a frequency of a ultrasonic wave which the ultrasonic electric signal is resulted from is the same with the preset frequency, and in response to a result that the frequency of the ultrasonic wave which the ultrasonic electric signal is different from the preset frequency, determining a generation position of an ultrasonic wave corresponding to the ultrasonic electric signal.

2. The apparatus according to claim 1 , wherein the main control integrated circuit is configured to, in response to the condition that the apparatus is in the non-touch control mode, control the ultrasonic generating circuit to be switched off.

3. The apparatus according to claim 1 , wherein the main control integrated circuit is configured to, in response to a condition that the apparatus is in a loudspeaker mode, control the first transducer device and/or the second transducer device to be in an electro-acoustic conversion mode.

4. The apparatus according to claim 1 , wherein the second acoustic wave signal further includes: controlled sound, and interfering sound; and
the third electric signal is obtained by amplifying electric signal corresponding to the ultrasonic wave with the preset frequency and/or the controlled sound.

5. The apparatus according to claim 1 , wherein, the main control integrated circuit judging whether the ultrasonic electric signal is included in the second electric signal includes:
the main control integrated circuit judging whether the ultrasonic electric signal is included in the second electric signal according to the frequency of the ultrasonic wave.

6. The apparatus according to claim 1 , wherein the signal processing device includes: an audio output circuit and a low-power-consumption digital audio processor; and
the amplifying and filtering circuit includes: an amplifying circuit, a band-pass filter circuit and an analog-to-digital conversion circuit.

7. The apparatus according to claim 6 , wherein the low-power-consumption digital audio processor is configured to, in response to the condition that the apparatus is in the loudspeaker mode, form an amplified audio after carrying out amplifying processing on the received audio and send the amplified audio to the audio output circuit, and in response to the condition that the apparatus is in the non-touch control mode, form the second electric signal after processing the third electric signal and send the second electric signal to the main control integrated circuit;
the audio output circuit is configured to, in response to the condition that the apparatus is in the loudspeaker mode, convert the amplified audio into an analog signal and send the analog signal to the first transducer device and/or the second transducer device; and
the first transducer device and/or the second transducer device is(are) configured for outputting the analog signal.

8. The apparatus according to claim 7 , wherein under the condition that a working mode of the apparatus is the non-touch control mode, the first transducer device is configured for receiving the second acoustic wave signal, converting the second acoustic wave signal into the first electric signal and sending the first electric signal to the amplifying and filtering circuit;
the amplifying and filtering circuit is configured for receiving the first electric signal, processing the first electric signal to obtain the amplified first electric signal, and sending the amplified first electric signal to the band-pass filter circuit;
the band-pass filter circuit is configured for filtering the amplified first electric signal to obtain a filtered amplified first electric signal, and sending the filtered amplified first electric signal to the analog-to-digital conversion circuit; and
the analog-to-digital conversion circuit is configured for converting the filtered and amplified first electric signal into the third electric signal, and sending the third electric signal to the low-power-consumption digital audio processor.

9. The apparatus according to claim 1 , further comprising: a loudspeaker in communicative connection with the signal processing device.

10. The apparatus according to claim 9 , wherein under the condition that the apparatus is in the loudsp

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Multimedia Technology Co Ltd

Inventors

• Cheng Peng
• Yu Shuhuan
• Bai Jinglu
• Su Junning

Classifications

• G06F3/0436

  in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate · CPC title

• H04R17/00

  Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title

• G06F3/043

  using propagating acoustic waves · CPC title

• G06F3/017 Primary

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• G06F2203/04108

  Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction · CPC title