KR102648418B1 - Impact sensing device and method using panel speaker - Google Patents

Abstract

The present invention relates to a shock detection device and method using a panel speaker that can detect external shock through a panel speaker that uses a light emitting panel as a vibrating component. According to one embodiment, the shock detection device using a panel speaker includes a light emitting panel and A panel speaker including a piezoelectric element attached to the light-emitting panel, a panel driver for driving the light-emitting panel, a speaker driver for driving the piezoelectric element, a control unit for controlling the panel driver and the speaker driver, and generating shock by monitoring the output of the piezoelectric element. It includes a shock detection unit that detects and outputs a shock detection signal, and a switch that selectively switches the input path between the speaker driver and the piezoelectric element, and the output path between the piezoelectric element and the shock detection unit under the control of the control unit.

Description

Impact detection device and method using panel speaker {IMPACT SENSING DEVICE AND METHOD USING PANEL SPEAKER}

The present invention relates to a shock detection device and method using a panel speaker that can detect external shock through a panel speaker that uses a light emitting panel as a vibrating component.

Display devices are applied to various electronic devices such as smartphones, laptops, monitors, TVs, electronic signs, video walls, etc.

The display mounted on the electronic device is protected by a case, etc., but there is a risk of damage if an external impact is applied, so a shock detection function is necessary.

Large commercial displays, such as large TVs for home displays and video walls installed in public places, may fall or fall when exposed to external shock due to personal carelessness or natural disasters such as earthquakes, which may pose a risk to people around them. Therefore, shock detection is not recommended. Securing safety reliability is required through alarm generation.

Some electronic devices, such as smartphones, contain shock sensors to reduce product damage.

However, the conventional shock sensor is provided as a separate component and mounted on the corresponding electronic device, so it has the disadvantage of increasing the number of components and manufacturing costs.

Accordingly, it is desirable to simplify component configuration and reduce manufacturing costs by reducing the number of components of a display and an electronic device including the display while including an impact detection function.

The present invention provides a shock detection device and method using a panel speaker that can detect external shock through a panel speaker that uses a light emitting panel as a vibrating component.

An impact detection device using a panel speaker according to an embodiment includes a panel speaker including a light emitting panel and a piezoelectric element attached to one surface of the light emitting panel; A panel driver that drives the light emitting panel; A speaker driver that drives a piezoelectric element; A control unit that controls the panel driver and the speaker driver; A shock detection unit that monitors the output of the piezoelectric element to detect the occurrence of shock and outputs a shock detection signal; and a switch for selectively switching the input path between the speaker driver and the piezoelectric element and the output path between the piezoelectric element and the impact detection unit under the control of the control unit.

The control unit operates the switch in time division into a sound generation period in which the drive signal from the speaker driver is supplied to the piezoelectric element and a shock detection period in which the output of the piezoelectric element is supplied to the shock detection unit.

During the sound generation period, the control unit outputs audio data and silence data inserted into a part of the audio data to the panel speaker. The control unit performs an impact detection operation by controlling the switch to configure an output path between the piezoelectric element and the impact detection unit during the silent period during which silent data is output.

The control unit analyzes the frequency of the audio data during the sound generation period and, if it is a single fixed frequency, does not insert silence data into the audio data and turns off the shock detection operation.

When the control unit receives a shock detection signal from the shock detection unit, it outputs the occurrence of shock through at least one of an audio alarm using a panel speaker, a video alarm using a light emitting panel, and an alarm message alarm through the communication unit.

The control unit can cut off the power after an alarm occurs due to an impact.

The impact detection unit digitally processes the sensing voltage output from the piezoelectric element and supplies it to the control unit as an impact detection signal. The control unit generates an alarm with different impact intensity depending on the level of the impact detection signal.

The light emitting panel may be a display panel or lighting panel using organic light emitting diodes.

A shock detection method using a panel speaker according to an embodiment includes supplying a drive signal corresponding to the audio data to a piezoelectric element when audio data is input, and causing the piezoelectric element to vibrate together with the light emitting panel to produce sound through the light emitting panel. A sound generating step that generates; A shock detection step for detecting the occurrence of shock by monitoring the output of the piezoelectric element when audio data is not input; And when the occurrence of an impact is detected, it includes an alarm step of outputting the occurrence of the impact through at least one of an audio alarm using a panel speaker, a video alarm using a light emitting panel, and an alarm message alarm through a communication unit.

One embodiment of the present invention detects external shock through a panel speaker that uses a light-emitting panel, such as a display panel or a lighting panel, as a vibrating component, thereby eliminating the need for a shock sensor as a separate component, thereby reducing the number of parts of the light-emitting panel and the electronic device including it. And manufacturing costs can be reduced.

One embodiment of the present invention generates an alarm as soon as an external impact is detected through the panel speaker, and outputs an alarm sound, an alarm message, etc. through at least one of the panel speaker, display panel, and communication network, and alarms according to the intensity of the impact. The intensity may vary. Accordingly, in one embodiment, the light emitting panel and the electronic device including the same alarm immediately when an external shock is received, thereby protecting the electronic device before it falls or falls, thereby reducing product damage, or in a dangerous location. By allowing people to evacuate, safety reliability and product value can be increased.

One embodiment of the present invention detects an impact through a panel speaker and generates an alarm as soon as a high-intensity earthquake occurs, thereby notifying people of the occurrence of an earthquake faster than an external earthquake warning system, thereby increasing safety reliability and product value.

Furthermore, an embodiment of the present invention can block the occurrence of fire due to a short circuit, etc. when a running light emitting panel and an electronic device using the same are damaged by falling or falling by turning off the power when necessary after an alarm occurs due to an external impact.

1 is a rear view and a cross-sectional view schematically showing the structure of a panel speaker according to an embodiment of the present invention.
Figure 2 is a block diagram schematically showing the configuration of an impact detection device using a panel speaker according to an embodiment of the present invention.
Figure 3 is a flowchart schematically showing the operation process of an impact detection device using a panel speaker according to an embodiment of the present invention.
Figure 4 is a diagram showing a sound generation operation of an impact detection device according to an embodiment of the present invention.
Figure 5 is a diagram showing an impact detection operation of an impact detection device according to an embodiment of the present invention.
Figure 6 is a graph showing the relationship between the sensing voltage and impact strength of a piezoelectric element according to an embodiment of the present invention.
Figure 7 is a waveform diagram illustrating an audio signal and a silent signal transmitted during a sound generation period according to an embodiment of the present invention.
Figure 8 is a diagram showing an operation process according to the results of frequency analysis of a sound source according to an embodiment of the present invention.
Figure 9 is a flowchart showing an impact detection method using a panel speaker according to an embodiment of the present invention.

1 is a rear view and a cross-sectional view schematically showing the structure of a panel speaker according to an embodiment of the present invention.

Referring to Figures 1 (A) and (B), the panel speaker 100 includes a light emitting panel 10 and a piezoelectric element 20 attached to the back of the light emitting panel 10 and using the light emitting panel 10 as a vibrating component. ) includes. The panel speaker 100 has a speaker function to generate sound, an impact sensor function to sense external shock, and a display function or lighting function using the light-emitting panel 10.

The light emitting panel 10 is a display panel that provides a display function using self-luminous elements. For example, the light emitting panel 10 may be an OLED display panel that displays images using Organic Light Emitting Diode (OLED) elements, or it may be one of various display panels.

Meanwhile, the light emitting panel 10 may be a lighting panel that provides a lighting function using self-luminous elements, for example, an OLED lighting panel that uses OLED elements as a surface light source.

The piezoelectric element 20 faces the light emitting surface (first surface) of the light emitting panel 10 and is attached and fixed to the back surface (second surface) that does not emit light using an adhesive 28 or the like.

The piezoelectric element 20 vibrates when a driving signal is applied to directly vibrate the light emitting panel 10, thereby generating sound through the vibration of the light emitting panel 10. The light emitting panel 10 can provide improved sound quality to the user by generating sound in the same direction as the light emission direction. On the back of the light emitting panel 10, at least one pair of piezoelectric elements 20 are arranged in parallel and spaced apart from each other, thereby generating frequency resonance, etc., thereby improving sound output.

The piezoelectric element 20 can sense an impact by generating a voltage when an external impact is applied when no driving signal is applied. For example, when the panel speaker 100 is turned off or a driving signal is not applied, such as during a mute period, the piezoelectric element 20 can function as a shock sensor that senses external shock.

Each piezoelectric element 20 includes a piezoelectric layer 26 positioned between first and second electrodes 22 and 24 that face each other. The piezoelectric layer 26 uses a piezoelectric material that generates voltage when pressure or impact is applied and undergoes mechanical deformation when an electric field is applied. Piezoelectric materials can convert electrical energy into mechanical vibration energy and convert mechanical vibration energy into electrical energy, and have the advantage of high conversion efficiency.

For example, piezoelectric materials include not only polycrystalline ceramics such as PZT (PbZrO3-PbTiO3), but also PMN-PT(Pb(Mg _1/3 Nb _2/3 )O ₃ -PbTiO ₃ ), PZN-PT(Pb(Zn _{1 /3} Nb _2/3 )O ₃ -xPbTiO ₃ ), PIN-PT(Pb(In _1/2 Nb _1/2 )O ₃ - PbTiO ₃ ), PYN-PT(Pb(Yb _{1 / 2} Nb _{1 /2} ) ₁ -x TixO ₃ ) single crystal piezoelectric materials, such as PVDF (Polyvinylidene fluoride), P(VDF-TrFE) (copolymers of vinylidene fluoride and triluoroethylene), flexible piezoelectric polymer materials such as BNT (BaNiTiO3), BZT-BCT (x It may include at least one of lead-free piezoelectric materials such as [Ba(Zr0.2Ti0.8)O3]-(1-x)[(Ba0.7Ca0.3)TiO3]).

The piezoelectric layer 10 vibrates when an electric field according to a driving signal is applied through the first and second electrodes 22 and 24 to vibrate the light emitting panel 20, thereby generating sound.

When an electric field is not applied through the first and second electrodes 22 and 24, the piezoelectric layer 10 generates a voltage when a physical force such as external shock or pressure is applied to the first and second electrodes 22 and 24. , 24), the occurrence of an impact can be sensed by outputting the generated voltage.

Therefore, in the panel speaker 100 according to an embodiment of the present invention, the piezoelectric element 10 performs the speaker function and the shock sensor function in time division, thereby eliminating the need for a separate shock sensor, thereby reducing the number of parts and reducing manufacturing costs. can do.

Figure 2 is a block diagram schematically showing the configuration of an impact detection device using a panel speaker according to an embodiment of the present invention, and Figure 3 schematically shows the operation process of the impact detection device according to an embodiment of the present invention. This is a flow chart.

Referring to FIG. 2, the shock detection device includes a panel driver 40 that drives the light emitting panel 40 of the panel speaker 100, and a speaker driver 50 that drives the piezoelectric element 20 of the panel speaker 100. and an impact detection unit 70 that detects the occurrence of impact from the output of the piezoelectric element 20. The speaker driver 50 and the impact detection unit 70 are selectively connected to the piezoelectric element 20 under the control of the control unit 30. It includes a switch 60 connected to and the like, and is not limited to the configuration of FIG. 2. An impact detection device according to one embodiment may be a display device or a lighting device.

The panel driver 40 is controlled by the control unit 30, receives video data from the control unit 30, processes it into analog, and supplies it to the light emitting panel 10. Accordingly, the light emitting panel 10 displays an image through a pixel array.

When the light emitting panel 10 is an OLED display panel, each subpixel constituting the pixel array may include an OLED element and a pixel circuit that independently drives the OLED element and is connected to a gate line and a data line. The panel driver 40 may include a gate driver that drives the gate lines of the pixel array and a data driver that drives the data lines of the pixel array.

Meanwhile, when the light emitting panel 10 is an OLED lighting panel, the panel driver 40 can drive the anode and cathode of the OLED device.

The speaker driver 50 is controlled by the controller 30, receives audio data from the controller 30, performs analog processing and amplification, and supplies it to the piezoelectric element 20 through the switch 60 as a driving signal. Accordingly, the piezoelectric element 20 vibrates together with the light emitting panel 10 to generate sound.

The shock detection unit 70 is controlled by the control unit 30 and detects the occurrence of shock by monitoring the output of the piezoelectric element 20 through the switch 60. The piezoelectric element 20 can generate a sensing voltage proportional to the intensity of the impact when it receives an external shock in a section where a driving signal is not applied through the switch 60, and the shock detection unit 70 through the switch 60 The sensing voltage of the piezoelectric element 20 can be supplied. The shock detection unit 70 may process the sensing voltage into a digital signal and supply it to the control unit 30 as an impact detection signal.

The control unit 30 performs control operations for the overall device. For example, the control unit 30 receives content through the communication unit 80 and separates the content into video data and audio data. The control unit 30 performs signal processing on video data and supplies the signal-processed video data to the panel driver 40. The control unit 30 performs signal processing on audio data and supplies the signal-processed audio data to the speaker driver 50.

The control unit 30 controls the switch 60 to connect the path between the speaker driver 50 and the piezoelectric element 20 during the sound generation period for outputting audio data, and the shock detection unit during the remaining periods excluding the sound generation period. The path between (70) and the piezoelectric element (20) is connected.

When the control unit 30 receives a shock detection signal from the shock detection unit 70, it generates at least one of an audio alarm, a video alarm, and an alarm message alarm. For example, the control unit 30 may generate an audio alarm signal and output the alarm signal through the speaker driver 50, the switch 60, and the panel speaker 100. The control unit 30 can generate a video alarm signal and display an alarm image through the panel driver 40 and the light emitting panel 10. The control unit 30 can transmit an alert message to the user's mobile phone through a communication network. The control unit 30 can classify the impact intensity into a plurality of levels depending on the size of the impact detection signal, and outputs an alarm of different sound pressure according to the impact intensity level through the panel speaker 100, or outputs an alarm of different sound pressures through the communication unit 80. An alarm message including the intensity level can be output. Additionally, the control unit 30 may turn off the power to ensure the stability of the electronic device after an alarm occurs.

Figure 3 is a flowchart schematically showing the operation process of the shock detection device using a panel speaker according to an embodiment of the present invention, and Figure 4 is a diagram showing the sound generation operation of the shock detection device according to an embodiment of the present invention. , Figure 5 is a diagram showing the impact detection operation of the impact detection device according to an embodiment of the present invention.

Referring to FIGS. 3 and 4, during the sound generation period, the control unit 30 receives a sound source through the peripheral interface unit or communication unit 80 and transmits the sound source through the speaker driver 50 and the switch 60. By supplying an audio signal to the piezoelectric element 20, the piezoelectric element 20 is driven to vibrate together with the light emitting panel 10 to generate sound.

Referring to Figures 3 and 5, the control unit 30 controls the switch 60 to connect the piezoelectric element 20 and the shock detection unit 70 during the shock detection period when the audio output is turned off. For example, the impact detection period may include a power-off period or a mute period during which the panel speaker 100 is not driven. Meanwhile, the control unit 30 can insert and output silence (null) data in the middle of the audio data even during the sound generation period during which the audio signal is output, and use the silence data insertion period as the shock detection period. A detailed explanation of this will be provided later.

During the shock detection period, when an external shock occurs and a physical force (F) is applied to the piezoelectric element 20, the piezoelectric element 20 generates a sensing voltage proportional to the intensity of the shock and detects the shock through the switch 60. Output as Boo (70). The shock detection unit 70 digitally processes the sensing voltage and outputs a shock detection signal to the control unit 30, and the control unit 30 generates a shock occurrence alarm. The control unit 30 can turn off the power as needed after an alarm occurs. Accordingly, even if the display device or lighting device falls or is damaged due to an external shock, a fire due to a short circuit can be prevented in advance. .

The shock detection unit 70 is controlled by the control unit 30 and receives a sensing voltage generated by receiving an external shock from the piezoelectric element 20 through the switch 60 to detect the occurrence of shock.

The control unit 30 can classify the impact intensity into a plurality of levels depending on the size of the impact detection signal, and outputs an alarm of different sound pressure according to the impact intensity level through the panel speaker 100, or outputs an alarm of different sound pressures through the communication unit 80. An alarm message including the intensity level can be output. Additionally, the control unit 30 may turn off the power to ensure the stability of the electronic device after an alarm occurs.

Figure 6 is a graph showing the relationship between the sensing voltage and impact strength of a piezoelectric element according to an embodiment of the present invention.

Referring to FIG. 6, the control unit 30 receives the sensing voltage generated by the piezoelectric element 20 due to an external impact as a digital signal through the impact detection unit 70, and adjusts the impact strength according to the size range of the sensing voltage. It can be decided on any one of multiple sections (1 to 6). The control unit 30 may output different alarms or warning messages depending on the determined impact intensity.

Figure 7 is a waveform diagram illustrating an audio signal and a silent signal transmitted during a sound generation period according to an embodiment of the present invention.

FIG. 7(A) illustrates existing audio data and audio signals, and FIG. 7(B) illustrates audio data and audio signals according to an embodiment, which will be described with reference to FIGS. 5 and 6.

Referring to Figures 7 (A) and (B), the control unit 30 samples an audio signal and receives audio data converted into a digital signal through the communication unit 80 or other interface. The speaker driver 50 receives audio data from the control unit 30, converts it into an analog audio signal, and outputs the audio signal through the switch 60 to drive the piezoelectric element 20 to produce sound through the panel speaker 100. generates

Referring to FIG. 7(B), the control unit 20 according to one embodiment inserts null data instead of some audio data into the audio data and supplies it to the speaker driver 50. ) is silenced without driving the piezoelectric element 20 during the silent data period. During this silent period, the control unit 20 can connect the piezoelectric element 20 and the shock detection unit 70 and detect the occurrence of shock through the piezoelectric element 20.

Null data can be inserted into audio data at regular intervals, and is inserted for a short period of time so that humans cannot perceive the silent data, so it does not affect the sound quality perceived by humans. The human ear is more sensitive to changes in the audio signal than to the level size of the audio signal,

For example, null data can be inserted and transmitted instead of audio data for a period of about 20 μs every 50 ms based on 1000 ms, where the time of about 20 μs means the minimum time that a person can be shocked. Therefore, the occurrence of an impact can be sensed through the piezoelectric element 20 during this silent period.

FIG. 8 is a diagram showing an operation process according to the results of frequency analysis of a sound source according to an embodiment of the present invention, and is performed by the control unit 30 shown in FIG. 2.

The control unit 30 may analyze the frequency of the sound source and selectively insert silence data into the audio data according to the analysis result.

The control unit 30 analyzes the frequency of the sound source (S802), and if it is fixed to a single frequency (S804; Y), it does not insert silence data into the audio data and turns off the shock detection operation (S806). This is because inserting silence data into audio data at a single fixed frequency can result in recognition.

If the frequency of the sound source is not a single fixed frequency (S804; N), the control unit 30 inserts silent data into the audio data at regular intervals as described above and maintains the shock detection operation (S808).

FIG. 9 is a flowchart showing an impact detection method using a panel speaker according to an embodiment of the present invention, and is performed by the control unit 30 shown in FIG. 2.

The control unit 30 may operate in one of the first and second impact detection modes depending on whether sound is played. The first impact detection mode operates when the piezoelectric element 20 does not generate sound due to the sound being turned off, and the second impact detection mode operates in a section where the piezoelectric element 20 generates sound due to the sound being turned on. You can.

First, the control unit 30 determines whether the sound is being played (S902), and if the sound is not being played (S902; N), the control unit 30 operates in the first impact detection mode and applies the piezoelectric shock detection unit 70 through the switch 60. It is connected to the element 20 (S904). The control unit 30 repeats the steps S902 and S904 described above until the impact is detected through the piezoelectric element 20 and the impact detection unit 70.

When an external shock is applied to the display device or lighting device, the piezoelectric element 20 generates a sensing voltage, and the shock is detected through the shock detection unit 70 (S906; Y), an alarm is generated or an alarm message is sent through communication. Transmit (S908). The control unit 30 may turn off the power after an alarm occurs (S908).

Meanwhile, if the control unit 30 determines that sound is reproduced in the above-described step S902 (S902; Y), it operates in the second impact detection mode (S910).

The control unit 30 analyzes the frequency of the sound source to determine whether it is a single fixed frequency (S912).

When the sound source frequency is a single fixed frequency (S912; Y), the control unit 30 turns off the second shock detection mode (S914) and outputs audio data without inserted silence data (S916). Accordingly, the piezoelectric element 20 is driven according to the audio signal supplied through the speaker driver 50 and the switch 60 to generate sound through the light emitting panel 10.

Meanwhile, if the sound source frequency is not a single fixed frequency (S912; N), the control unit 30 inserts silence data into the middle of the audio data and outputs it (S920). Accordingly, the piezoelectric element 20 is driven according to the audio signal supplied through the speaker driver 50 and the switch 60 to generate sound through the light emitting panel 10.

When a shock is detected through the piezoelectric element 20 and the shock detection unit 70 (S922; Y) during the silence period in which silence data is inserted, the control unit 30 generates an alarm or transmits an alarm message through communication. (S924). The control unit 30 may turn off the power after an alarm occurs (S908).

If no shock is detected (S922; N) during the silence period in which the silence data is inserted, the control unit 30 returns to the above-described step S902.

As such, an embodiment of the present invention detects external shock through a panel speaker that uses a light-emitting panel such as a display panel or a lighting panel as a vibrating component, thereby eliminating the need for a shock sensor as a separate component, and thus the light-emitting panel and the electronic device including the same. The number of parts and manufacturing costs can be reduced.

One embodiment of the present invention generates an alarm as soon as an external impact is detected through the panel speaker, and outputs an alarm sound, an alarm message, etc. through at least one of the panel speaker, display panel, and communication network, and alarms according to the intensity of the impact. The intensity may vary. Accordingly, in one embodiment, the light emitting panel and the electronic device including the same alarm immediately when an external shock is received, thereby protecting the electronic device before it falls or falls, thereby reducing product damage, or in a dangerous location. By allowing people to evacuate, safety reliability and product value can be increased.

One embodiment of the present invention detects an impact through a panel speaker and generates an alarm as soon as a high-intensity earthquake occurs, thereby notifying people of the occurrence of an earthquake faster than an external earthquake warning system, thereby increasing safety reliability and product value.

Furthermore, an embodiment of the present invention can block the occurrence of fire due to a short circuit, etc. when a running light emitting panel and an electronic device using the same are damaged by falling or falling by turning off the power when necessary after an alarm occurs due to an external impact.

Through the above-described content, those skilled in the art will be able to see that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to what is described in the detailed description of the specification, but should be defined by the scope of the patent claims.

100: panel speaker 10: light emitting panel
20: Piezoelectric element 30: Control unit
40: Panel driving unit 50: Speaker driving unit
60: switch 70: shock detection unit
80: Department of Communications

Claims (13)

A panel speaker including a light emitting panel and a piezoelectric element attached to the light emitting panel and vibrating with the light emitting panel according to a driving signal to generate sound through the light emitting panel;
a panel driver that drives the light emitting panel;
a speaker driver that drives the piezoelectric element;
a control unit that controls the panel driver and the speaker driver;
a shock detection unit that monitors the output of the piezoelectric element to detect the occurrence of shock and outputs a shock detection signal to the control unit; and
A switch for selectively switching an input path between the speaker driver and the piezoelectric element and an output path between the piezoelectric element and the impact detection unit under the control of the control unit,
The control unit
A shock detection device using a panel speaker that turns off the power after an alarm occurs due to the shock. In claim 1,
The control unit
A shock detection device using a panel speaker, wherein the switch is time-divided into a sound generation period in which the drive signal of the speaker driver is supplied to the piezoelectric element and a shock detection period in which the output of the piezoelectric element is supplied to the shock detection unit. In claim 2,
The control unit
In the sound generation period, audio data and silence data inserted in a part of the audio data are output to the panel speaker,
A shock detection device using a panel speaker that performs a shock detection operation by controlling the switch to configure an output path between the piezoelectric element and the shock detection unit in a silent period for outputting the silence data. In claim 3,
The control unit
In the sound generation period, a shock detection device using a panel speaker analyzes the frequency of the audio data and, if it is a single fixed frequency, turns off the shock detection operation without inserting the silence data into the audio data. In claim 1,
The control unit
When a shock detection signal is received from the shock detection unit,
A shock detection device using a panel speaker that outputs the occurrence of the shock through at least one of an audio alarm using the panel speaker, a video alarm using the light-emitting panel, and an alarm message alarm through a communication unit connected to the control unit. delete The method of claim 5,
The shock detection unit digitally processes the sensing voltage output from the piezoelectric element and supplies it to the control unit as the shock detection signal,
A shock detection device using a panel speaker, wherein the control unit generates an alarm with different shock intensity depending on the level of the shock detection signal. In claim 1,
An impact detection device using a panel speaker, wherein the light emitting panel is a display panel or lighting panel using organic light emitting diodes. In the shock detection method using a panel speaker according to claim 1,
When audio data is input, a sound generation step of supplying a drive signal corresponding to the audio data to the piezoelectric element, causing the piezoelectric element to vibrate together with the light emitting panel to generate sound through the light emitting panel;
A shock detection step of detecting the occurrence of shock by monitoring the output of the piezoelectric element when the audio data is not input;
An alarm step of outputting the occurrence of the shock through at least one of an audio alarm using the panel speaker, a video alarm using the light emitting panel, and an alarm message alarm through a communication unit when the occurrence of the shock is detected; and
A shock detection method using a panel speaker, including the step of turning off the power after generating an alarm according to the shock occurrence. In claim 9,
The sound generation step is
outputting the audio data and silence data inserted into a portion of the audio data; and
A shock detection method using a panel speaker, comprising the step of detecting the occurrence of the shock by monitoring the output of the piezoelectric element during the silence period during which the silence data is output. In claim 10,
The sound generation step is
A shock detection method using a panel speaker, wherein the frequency of the audio data is analyzed and, if it is a single fixed frequency, the step of detecting the shock occurrence is turned off without inserting the silence data into the audio data. delete In claim 10,
The alarm generation step is
A shock detection method using a panel speaker that generates an alarm with different shock intensity depending on the level of the sensing voltage output from the piezoelectric element.