CN1326380C - Flip-type electronic device and method for detecting open and close states of the flip - Google Patents

Abstract

A method for detecting the open and close state of a flip cover and a flip cover electronic device applying the method judge the open and close state of the flip cover electronic device according to special sound waves output by a loudspeaker in the flip cover electronic device.

Description

Flip-type electronic device and method for detecting open and close states of the flip

technical field

The invention relates to a flip-type electronic device and a method for detecting the opening and closing state of the flip, in particular to a method for detecting the opening and closing state of the flip by using special sound waves and the flip-type electronic device.

Background technique

With the vigorous development of the electronic industry, clamshell electronic products are widely used in various products. Taking the mobile phone industry as an example, models with clamshell functions are generally favored by the market. Due to the hardware design of the flip cover, it is necessary to match the components that detect the opening and closing of the flip cover, so as to perform other functions, such as turning on or off the power supply.

Generally, there are two methods for detecting the opening and closing of flip cover:

1. Use paired magnets and magnetic switches: Commonly used magnetic switches are mostly magnetic reed switches or Hall sensors. Figure 1a shows a schematic diagram of a mobile phone using a magnetic switch. Figure 1b shows an enlarged schematic view of Figure 1a. As shown in FIG. 1 b , the magnet 13 is fixed on the upper cover 11 of the mobile phone, and the magnetic switch 14 is installed on the lower cover 12 of the mobile phone. When the mobile phone is opened or closed, the distance between the magnet 13 and the magnetic switch 14 changes accordingly, and the magnetic field intensity sensed by the magnetic switch 14 changes accordingly; The opening and closing states of the loam cake 11 have conduction or disconnection states corresponding to electrical characteristics.

2. Using telescopic switches: Figure 2a shows a schematic diagram of a mobile phone using telescopic switches. Fig. 2b shows the enlarged schematic view of Fig. 2a; the upper cover 11 of the mobile phone has a push rod 21; When the mobile phone is closed, the push rod 21 passes through the guide hole 22, and the retractable switch 23 is pushed to shrink, so that the system determines that the mobile phone is in a closed state. When the mobile phone is turned on, the retractable switch 23 is not compressed and returns to the extended state, and the system can determine that the state of the mobile phone is a clamshell.

However, no matter whether the magnetic switch or the retractable switch is used, additional components and control circuits need to be added, which not only increases the hardware space, but also increases the manufacturing cost.

Contents of the invention

In view of this, the object of the present invention is to provide a method for detecting the opening and closing state of the flip cover, and judge the opening and closing state of the flip cover according to a special sound wave.

The clamshell electronic device to which the method of the present invention is applicable comprises an upper cover and a lower cover, the upper cover is provided with a loudspeaker, and the lower cover is provided with a microphone, and the method for detecting the open and closed state of the renovate cover comprises the following steps: first, the speaker emits a Special sound waves; then, the microphone receives the sound waves emitted by the speaker to judge the closed state of the upper cover. Wherein, the special sound wave emitted by the loudspeaker has a frequency and a loudness.

When the microphone cannot correctly receive the special sound waves from the speaker, it means that the electronic device is in an on state; when the microphone can correctly receive the special sound waves from the speaker, it means that the electronic device is in an off state.

Based on the above-mentioned method for detecting the opening and closing state of a flip cover, another object of the present invention is to provide a flip-type electronic device, which at least includes: an upper cover, a lower cover, and a processing device. Wherein, the upper cover has a loudspeaker for emitting special sound waves; the lower cover has a microphone for receiving detection sound waves; and the processing device judges the opening and closing state of the clamshell electronic device according to the detection sound waves received by the microphone .

In order to make the above-mentioned and other purposes, features, and advantages of the present invention more clearly understood, the preferred embodiments are specifically listed below, together with the accompanying drawings, and are described in detail as follows:

Description of drawings

Figure 1a shows a schematic diagram of a mobile phone using a magnetic switch.

Figure 1b shows an enlarged schematic view of Figure 1a.

Figure 2a shows a schematic diagram of a mobile phone using a retractable switch.

Figure 2b shows an enlarged schematic view of Figure 2a.

Fig. 3 shows a flowchart of a method embodiment of the present invention.

Figure 4a shows a schematic diagram of a clamshell phone.

Fig. 4b shows a schematic diagram of the interior of the flip-type mobile phone of the present invention.

Symbol Description

11, 31: upper cover; 12, 32: lower cover;

13: magnet; 14: magnetic switch;

21: Neck rod; 22: Guide hole;

23: retractable switch; 30: mobile phone;

33: speaker; 34: keyboard;

35: screen; 36: microphone

40: Processing device.

Detailed ways

The mobile phone device is the most common flip-type electronic device, wherein, the flip-type mobile phone device has an upper cover and a lower cover. In the present invention, a loudspeaker and a microphone are respectively arranged on the upper cover and the lower cover of the flip-type electronic device.

As shown in Figure 3, the method for detecting the open and closed state of the flip disclosed by the present invention includes the following steps:

Step 100: Make the speaker output a special sound wave, and then execute Step 110. Since the frequency range that ordinary people can hear is 20Hz~20KHz, in order to prevent users from hearing the special sound waves emitted by the speaker, the special sound waves sent by the speaker cannot be within the range of 20Hz~20KHz. After a fixed time T, it is output by the speaker. Therefore, the special sound wave output by the speaker is a periodically interrupted sound signal, so as to reduce the power consumed by the speaker.

The special sound waves sent by the speaker can be a melody to increase the intelligibility. In addition, the loudness of the special sound wave output by the speaker must be greater than the background noise. If the loudness output by the speaker is too high, the sensitivity of detecting the opening and closing states of the flip-type electronic device will be reduced, and the power consumption of the flip-type electronic device will be increased. . The background noise in a general environment is about 30 decibels, and in this embodiment, the loudness output by the loudspeaker is about 40-60 decibels.

Step 110: The microphone receives a detection sound wave, and then executes Step 120. Since the microphone can receive sound waves in a fixed frequency band, the first frequency and the first loudness of the special sound waves sent by the loudspeaker must be within the range that the microphone can receive. When the first loudness of the special sound wave output by the loudspeaker is closer to the lowest loudness that the microphone can receive, it means that the sensitivity of judging the opening and closing states of the clamshell electronic device is higher.

Assume that the speaker is disposed on the upper cover of the flip-type electronic device, and the microphone is disposed on the lower cover of the flip-type electronic device. Due to the different mechanism design of the clamshell electronic device, there will be a decibel attenuation between the speaker and the microphone. Therefore, the loudness obtained by subtracting the decibel attenuation from the loudness output by the speaker must be within the receiving range of the microphone. If the mechanism design of the electronic device is good, the attenuation decibel is close to 0 decibel.

Step 120: Determine the frequency and loudness of the detection sound wave received by the microphone. Since the sound wave includes frequency and loudness, by judging the frequency and loudness of the detection sound wave received by the microphone, it can be known whether the microphone has received the special sound wave output by the speaker.

When the frequency of the detection sound wave received by the microphone is equal to the first frequency of the special sound wave, it means that the detection sound wave received by the microphone is a special sound wave output by the speaker, and when the loudness of the detection sound wave is greater than or equal to a preset loudness, it means that the sound wave received by the microphone is If the special sound wave conforms to the loudness of the lid closing, step 130 is executed.

If the frequency of the detection sound wave received by the microphone is not equal to the first frequency, it means that the detection sound wave received by the microphone is not a special sound wave output by the speaker. Or when the frequency of the detection sound wave received by the microphone is equal to the first frequency but the loudness is smaller than the preset loudness, at this time, step 140 is executed.

Wherein, since the loudness of the sound wave output by the speaker needs to be within the loudness range detectable by the microphone, the preset loudness is within the loudness range detectable by the microphone. When the preset loudness is the lowest loudness that can be detected by the microphone, it means that the sensitivity for judging the opened and closed states of the clamshell electronic device is the highest.

When the included angle between the upper cover and the lower cover of the flip-type electronic device is smaller than a preset angle, it is determined as a closed state. In this embodiment, it is assumed that the preset included angle is 5 degrees. Therefore, when the angle between the upper cover and the lower cover is equal to 5 degrees, the loudness received by the microphone is the preset loudness.

Step 130: Since the speaker and the microphone are respectively arranged on the upper cover and the lower cover of the clamshell electronic device, when the frequency of the detection sound wave received by the microphone is equal to the first frequency, and when the loudness of the sound wave received by the microphone is also greater than or equal to When the loudness is preset, it means that the upper cover and the lower cover of the flip-type electronic device are very close, so it is judged that the flip-type electronic device is closed, and then step 100 is performed to make the speaker continue to send out special sound waves, so that the detection of the flip-type electronic device can continue. The open and closed state of an electronic device.

As described in step 100, the speaker sends out special sound waves every fixed time T, but when the loudness change detected by the microphone is greater than a preset change value, the fixed time T is decreased. When the loudness change detected by the microphone is less than a preset change value, the fixed time T is increased.

Step 140: When the cover of the flip-type electronic device is lifted, the microphone cannot receive the special sound wave output by the speaker. Therefore, when the loudness of the detection sound wave received by the microphone is less than the preset loudness, or the frequency of the detection sound wave is not equal to the first frequency, it means that the upper cover of the clamshell electronic device has been lifted and is in an open state. Then, step 100 is executed, so that the speaker continues to send out special sound waves, so as to continue to detect the opening and closing states of the clamshell electronic device.

Embodiments of the present invention will be described below for a flip-type mobile phone. Figure 4a shows a schematic diagram of a clamshell phone. As shown in the figure, the flip-type mobile phone 30 is in an open state, and is composed of an upper cover 31 and a lower cover 32 , wherein the upper cover 31 includes: a speaker 33 (commonly known as a speaker) and a screen 35 . The lower cover 32 includes: a keyboard 34 and a microphone 36 . The speaker 33 on the upper cover 31 and the microphone 36 on the lower cover 32 are arranged at corresponding positions. Depending on the mechanism design of the clamshell electronic device, the positions of the microphone and the speaker are different, and generally speaking, they are arranged at corresponding positions.

Fig. 4b shows a schematic diagram of the interior of the flip-type mobile phone of the present invention. As shown in the figure, the speaker 33 sends out a special sound wave every interrupt period, and the microphone 36 is used to receive the sound wave, wherein the detection time range of the microphone 36 needs to include the time range during which the speaker 33 outputs the special sound wave. In this embodiment, the detection time of the microphone is between 1/100 second and 1 second.

When the phone remains closed or open, the change in loudness detected by the microphone is small; when the mobile phone is turned from closed to open, or from open to closed, the change in loudness detected by the microphone is larger.

When the loudness change is less than a preset change value, it means that the mobile phone remains in the closed state or the open state. At this time, the interruption period of the special sound wave sent by the loudspeaker is the first interruption period.

When the loudness change is greater than a preset change value, it means that the mobile phone is turned from the open state to the closed state, or from the closed state to the open state, then the interruption period of the special sound wave sent by the speaker is the second interruption period, wherein, the first The first interruption period is longer than the second interruption period.

In other words, when the mobile phone is turned from open to closed, or from closed to open, the interruption period between each special sound wave sent by the speaker is shorter; when the mobile phone remains closed or open , the interruption period between each special sound wave sent by the speaker is longer.

After the microphone 36 receives the sound wave, the frequency F and the loudness A of the sound wave received by the microphone 36 are judged by the processing device 40, wherein the processing device 40 is an analog-to-digital converter ADC and a digital signal processor DSP commonly present in electronic products . The processing device 40 judges whether the mobile phone 30 is on or off according to the frequency F and the loudness A.

When the mobile phone 30 is closed, the upper cover 31 is very close to the lower cover 32, so the microphone 36 can correctly receive the special sound waves sent by the speaker 31. When the processing device 40 detects that the frequency F of the sound wave received by the microphone 36 is equal to the first frequency, and the loudness A of the sound wave is greater than or equal to the preset loudness, it is determined that the mobile phone 30 is in an off state.

When the mobile phone 30 is in an open state, the distance between the upper cover 31 and the lower cover 32 increases, causing the loudness A of the sound wave received by the microphone 36 to decrease. When the processing device 40 detects that the frequency F of the sound wave received by the microphone 36 is not equal to a predetermined frequency, or that the loudness A is less than a predetermined loudness, it means that the mobile phone 30 is turned on and the corresponding function is activated.

As the volume of electronic products is shrinking day by day, the present invention utilizes the existing components and can correctly judge the opening and closing status of flip-type electronic devices without adding other components, which not only saves hardware space, but also reduces the cost of electronic devices. cost.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person in the industry may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope should be determined by what is defined in the claims.

Claims (16)

1. a flip cover is opened the method for closed condition, is applicable to a flip type electronic device, wherein, this flip type electronic device comprises a loam cake and a lower cover, and this loam cake is provided with a loud speaker, and this lower cover is provided with a microphone, this flip cover is opened the method for closed condition, comprises the following steps:

(a) this loud speaker sends a special sound wave, and this special sound wave has a first frequency and one first loudness; And

(b) according to the received detection sound wave of this microphone, judge the closed condition of opening of this loam cake,

Wherein, this special sound wave is an one-period property interruption voice signal, to reduce the electric energy that this loud speaker is consumed, when this microphone receives this special sound wave, and when the loudness of this special sound wave variation difference was preset changing value less than one, then this special sound wave had for first interrupt cycle; When this microphone receives this special sound wave, and the loudness of this special sound wave is when changing difference greater than above-mentioned default changing value, and then this special sound wave had for second interrupt cycle, and this first interrupt cycle is greater than this second interrupt cycle.

2. flip cover as claimed in claim 1 is opened the method for closed condition, and this first loudness is more than or equal to this microphone detectable one minimum loudness.

3. flip cover as claimed in claim 2 is opened the method for closed condition, and wherein this determining step (b) also comprises:

(b1) when this loudness that detects sound wave greater than a default loudness, and the frequency of this detection sound wave judges that this loam cake is in closed condition when equaling this first frequency;

(b2) when this loudness that detects sound wave during, judge that this loam cake is in open mode less than this default loudness;

(b3) when the frequency of this detection sound wave is not equal to this first frequency, judge that this loam cake is in open mode.

4. flip cover as claimed in claim 3 is opened the method for closed condition, and wherein, this default loudness is within the loudness scope that this microphone can detect.

5. flip cover as claimed in claim 1 is opened the method for closed condition, and wherein this first frequency is outside the frequency range that people's ear can be heard, and this first loudness is greater than the background noise of environment.

6. flip cover as claimed in claim 1 is opened the method for closed condition, also comprises the following steps at this determining step (b) before:

Measure this microphone and open under the state from a closed condition to, the loudness that institute's energy measures at this loam cake.

7. flip type electronic device comprises at least:

One loam cake has a loud speaker, in order to send a special sound wave;

One lower cover has a microphone, detects sound wave in order to receive one; And

One processing unit, it judges the closed condition of opening of this loam cake according to the sound wave that this microphone receives,

Wherein, this special sound wave is an one-period property interruption voice signal, to reduce the electric energy that this loud speaker is consumed, when this microphone receives this special sound wave, and when the loudness of this special sound wave variation difference was preset changing value less than one, then this special sound wave had for first interrupt cycle; When this microphone receives this special sound wave, and the loudness of this special sound wave is when changing difference greater than above-mentioned default changing value, and then this special sound wave had for second interrupt cycle, and this first interrupt cycle is greater than this second interrupt cycle.

8. flip type electronic device as claimed in claim 7, wherein this special sound wave has a first frequency and one first loudness, this first frequency this microphone can detected scope within and outside the frequency range that people's ear can be heard, this first loudness is greater than a background noise of environment.

9. flip type electronic device as claimed in claim 7, wherein this processing unit detects sound wave according to this, and judge the closed condition of opening of this loam cake, when this microphone receives this special sound wave, and when the loudness of the sound wave that microphone received during more than or equal to default loudness, this processing unit judges that this loam cake is in a closed condition.

10. flip type electronic device as claimed in claim 8, wherein this first loudness is more than or equal to this microphone detectable one minimum loudness.

11. flip type electronic device as claimed in claim 10, wherein this processing unit writes down the detected loudness of this microphone institute energy when this loam cake opens to a predetermined angle state, and it is preset loudness as one, wherein, this first loudness is greater than this default loudness.

12. the method for renovating folding condition of a flip cover formula electronic installation, this flip type electronic device comprise a loam cake and a lower cover, this loam cake is provided with a loud speaker, and this lower cover is provided with a microphone, and this method comprises the following steps:

(a) this loud speaker sends a special sound wave, and this special sound wave has a first frequency and one first loudness; And

(b) this microphone receives one and detects sound wave, when the frequency of judging this detection sound wave equals above-mentioned first frequency, whether judges greater than a default loudness whether this loam cake is closure state according to the loudness of this detection sound wave,

Wherein, this special sound wave is an one-period property interruption voice signal, to reduce the electric energy that this loud speaker is consumed, when this microphone receives this special sound wave, and when the loudness of this special sound wave variation difference was preset changing value less than one, then this special sound wave had for first interrupt cycle; When this microphone receives this special sound wave, and the loudness of this special sound wave is when changing difference greater than above-mentioned default changing value, and then this special sound wave had for second interrupt cycle, and this first interrupt cycle is greater than this second interrupt cycle.

13. the method for renovating folding condition of flip cover formula electronic installation as claimed in claim 12, this first loudness are this microphone detectable one minimum loudness, this default loudness also is this minimum loudness.

14. the method for renovating folding condition of flip cover formula electronic installation as claimed in claim 12, wherein this first loudness is greater than this microphone detectable one minimum loudness, and this determining step (b) also comprises:

(b1) when this loudness that detects sound wave during, judge that this loam cake system is in closure state greater than this default loudness;

(b2) when this loudness that detects sound wave during, judge that this loam cake system is in open mode less than this default loudness.

15. the method for renovating folding condition of flip cover formula electronic installation as claimed in claim 12, wherein this first frequency of this special sound wave is outside the frequency range that people's ear can be heard, and this first loudness is greater than a background noise of environment.

16. the method for renovating folding condition of flip cover formula electronic installation as claimed in claim 12 also comprises the following steps at this determining step (b) before:

Should default loudness tie up to this loam cake when opening to a predetermined angle state, measure the loudness that this microphone can detect this special sound wave.

Images