CN213583111U

CN213583111U - Far-field voice switch circuit and liquid crystal television

Info

Publication number: CN213583111U
Application number: CN202022776806.3U
Authority: CN
Inventors: 唐会香; 钟宇; 李春亮
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-06-29
Anticipated expiration: 2030-11-26

Abstract

The utility model discloses a far field voice switch circuit, including single-pole double-throw switch SW1 and AND gate chip, the normally closed contact of single-pole double-throw switch SW1 is connecting resistance R1, resistance R2 and resistance R4 respectively, and resistance R4 connects GPIO2 pin and electric capacity C2 of SOC chip; the resistor R1 is connected with a power supply VDD, the resistor R2 is connected with a first input end of the AND gate chip, a second input end of the AND gate chip is connected with the microphone, and an output end of the AND gate chip is connected with a GPIO1 pin of the SOC chip; the first contact of the single pole double throw switch SW1 is grounded and the second contact is floating. A liquid crystal television including the far field voice switch circuit is also disclosed. The utility model discloses a manual switch control opens and closes of far field speech function, and the user can independently decide whether to open far field speech function, has ensured user privacy, has promoted user experience.

Description

Far-field voice switch circuit and liquid crystal television

Technical Field

The utility model relates to an intelligence voice device technical field, specific saying so, far field pronunciation switch circuit and LCD TV.

Background

With the development of voice recognition technology, products carrying far-field voice functions are gradually permeated into the lives of people, which undoubtedly promotes a lot of convenience. However, the far-field voice function is not completely closed after running, and even if a voice instruction is sent to close the far-field voice function, the device still monitors the opening instruction of the user at a background moment, so that the user cannot autonomously determine whether to open the far-field voice function, and the privacy authority of the user is threatened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a far field pronunciation switch circuit and LCD TV for solve the equipment user who has far field speech function among the prior art and can't independently decide whether to open far field speech function's problem.

The utility model discloses a following technical scheme solves above-mentioned problem:

a far-field voice switch circuit comprises a single-pole double-throw switch SW1 and an AND gate chip, wherein a normally closed contact of the single-pole double-throw switch SW1 is respectively connected with a resistor R1, a resistor R2 and a resistor R4, the resistor R4 is connected with a GPIO2 pin and a capacitor C2 of an SOC chip, and the capacitor C2 is grounded; the resistor R1 is connected with a power supply VDD, the resistor R2 is connected with a first input end of the AND gate chip, a second input end of the AND gate chip is connected with a microphone, and an output end of the AND gate chip is connected with a GPIO1 pin of the SOC chip; the resistor R2 is grounded through a capacitor C1; the first contact of the single pole double throw switch SW1 is grounded and the second contact is floating.

When the single-pole double-throw switch SW1 is connected with the first contact, the first input end of the AND gate chip is at a low level, the output end of the AND gate chip is at a low level constantly, namely the GPIO1 pin of the SOC chip is input at a low level, and the GPIO1 pin of the SOC chip receives an invalid voice control command; the GPIO2 pin of the SOC chip inputs low level, and the SOC chip recognizes the current state as far-field speech function closing.

When the single-pole double-throw switch SW1 is switched on the second contact, the first input end of the AND gate chip is equal to the access power VDD, the first input end of the AND gate chip is at a high level, and at the moment, according to the characteristics of the AND gate circuit, the output signal of the output end of the AND gate chip is only controlled by the signal of the second input end of the AND gate chip, namely, a voice control command input by a microphone, so that the GPIO1 of the SOC chip receives an effective voice control command; meanwhile, a GPIO2 pin of the SOC chip synchronously receives high level through a resistor R4, and the SOC chip identifies that the current state is that the far-field speech function is normal.

The liquid crystal television comprises the far-field voice switch circuit.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model discloses a manual switch control opens and closes of far field speech function, and the user can independently decide whether to open far field speech function, has ensured user privacy, has promoted user experience.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention;

U1-AND gate chip.

Detailed Description

The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.

Example (b):

with reference to fig. 1, a far-field speech switch circuit includes a single-pole double-throw switch SW1 and an and-gate chip U1, a normally closed contact (2 pin) of the single-pole double-throw switch SW1 is connected with a resistor R3 (the resistor R3 is a 0 ohm resistor), a resistor R3 is respectively connected with a resistor R1, a resistor R2 and a resistor R4, the resistor R4 is connected with a GPIO2 pin of an SOC chip and a capacitor C2, and the capacitor C2 is grounded; the resistor R1 is connected with a power supply VDD, the resistor R2 is connected with a first input end (pin 2) of the AND gate chip U1, a second input end (pin 1) of the AND gate chip U1 is connected with a Microphone (MIC), and an output end (pin 4) of the AND gate chip U1 is connected with a GPIO1 pin of the SOC chip; the resistor R2 is grounded through a capacitor C1; the first contact (pin 1) of the single-pole double-throw switch SW1 is grounded through a resistor R5 (the resistor R5 is a 0 ohm resistor), and the second contact is arranged in a floating mode (pin 3).

When the single-pole double-throw switch SW1 is connected with the first contact (pin 1), the first input end of the and gate chip U1 is at a low level, and the output end (PDM _ D0 signal) of the and gate chip U1 is at a low level constantly, that is, the pin GPIO1 of the SOC chip is at a low level, and the pin GPIO1 of the SOC chip receives an invalid voice control command; the GPIO2 pin of the SOC chip inputs low level, and the SOC chip recognizes the current state as far-field speech function closing.

When the single-pole double-throw switch SW1 is connected with the second contact (pin 3), the first input end of the and gate chip U1 is equal to the access power supply VDD, the first input end of the and gate chip U1 is at a high level, at this time, according to the characteristics of the and gate circuit, the output signal (PDM _ D0 signal) of the output end of the and gate chip U1 is only controlled by the signal of the second input end of the and gate chip U1, namely, a voice control command input by a microphone, and therefore, the GPIO1 of the SOC chip receives an effective voice control command; meanwhile, a GPIO2 pin of the SOC chip synchronously receives high level through a resistor R4, and the SOC chip identifies that the current state is that the far-field speech function is normal.

By adopting the switching circuit, whether the far-field voice function is started or not is independently determined by a user, the privacy of the user is guaranteed, and the user experience is improved.

In the circuit, the recommended value of the resistor R1 is 100K, the recommended value of the resistor R2 is 10K, the recommended value of the capacitor C1 is 0.1uF, the recommended value of the resistor R4 is 10K, and the recommended value of the capacitor C2 is 0.1 uF.

The liquid crystal television comprises the far-field voice switch circuit. The GPIO1 pin of the SOC chip of the liquid crystal television is connected with the output end of the gate chip U1, the GPIO2 pin is connected with the resistor R4 of the far-field voice switch circuit, and the microphone of the liquid crystal television and the second input end of the gate chip U1 in the far-field voice switch circuit are connected.

The utility model discloses but not limited to LCD TV, other intelligent house that contain far field voice function all can add far field voice switch circuit according to above-mentioned connected mode for realize manually opening or close far field voice function.

Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are merely preferred embodiments of the present invention, it is to be understood that the present invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.

Claims

1. A far-field voice switch circuit is characterized by comprising a single-pole double-throw switch SW1 and an AND gate chip, wherein a normally closed contact of the single-pole double-throw switch SW1 is respectively connected with a resistor R1, a resistor R2 and a resistor R4, the resistor R4 is connected with a GPIO2 pin and a capacitor C2 of an SOC chip, and the capacitor C2 is grounded; the resistor R1 is connected with a power supply VDD, the resistor R2 is connected with a first input end of the AND gate chip, a second input end of the AND gate chip is connected with a microphone, and an output end of the AND gate chip is connected with a GPIO1 pin of the SOC chip; the resistor R2 is grounded through a capacitor C1; the first contact of the single pole double throw switch SW1 is grounded and the second contact is floating.

2. A liquid crystal television comprising the far field voice switch circuit of claim 1.