Frequency-division ultrasonic parametric array-based mobile phone under-screen receiver realization method and device

Abstract

The invention discloses a frequency-division ultrasonic parametric array-based mobile phone under-screen receiver realization method and device. According to the basic principle of the invention, callcommunication audio signals and ultrasonic carrier signals are modulated; based on a characteristic that sound signals generate a nonlinear effect when being propagated in the air, and the audio signals can be demodulated again from the ultrasound carrier waves; since the ultrasonic waves have good directivity and penetrability, when an ultrasonic wave sensor is tightly coupled with screen glass,the ultrasonic waves can be transmitted through a screen module; and therefore, with the method and device of the present invention adopted, holes are not required to be formed in the screen glass, and thus, the display area of the screen of a mobile phone is not required to be occupied, and good sound directivity, high call communication quality and privacy can be ensured; the method and deviceof the present invention are based on a frequency division technique, a parametric array loudspeaker is combined with ultrasonic detection, so that the method and device provided by the technical schemes of the invention can integrate functions such as ultrasonic-based distance measurement, human ear positioning, and even facial recognition.

Description

technical field [0001] The invention relates to a directional sound transmission technology based on a parametric array, in particular to a method and device for realizing an earpiece under a mobile phone screen based on a frequency-division ultrasonic parametric array. Background technique [0002] With the continuous development of touch screen mobile phones, the screen-to-body ratio (the ratio of the screen area to the total front area of ​​the mobile phone) has been continuously increased, and finally the front of the mobile phone is completely covered by the screen, which is the so-called "full screen", which has become a hot spot in the recent development of mobile phones. And the goals that major mobile phone manufacturers are constantly pursuing, and some mobile phones with high screen ratios have been released on the market. The main representative products are: [0003] 1. The Galaxy S8 / S8+ and Note8 series products launched by Samsung in 2017 have realized narrowe...

AI Technical Summary

Problems solved by technology

However, the upper and lower borders are still wider than the left and right borders in order to be able to set the earpiece and infrared distance sensor.

[0004] 2. Apple's iPhone X has narrower borders on the left, right and bottom, but the middle of the upper border needs to place earpieces and other sensors, making the screen near the upper border appear concave, which affects the user experience

However, in order to leave a hole fo

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