TWI635465B - Electronic device and drop warning method - Google Patents

Abstract

The invention provides an electronic device comprising a signal processing circuit, an acceleration sensor and an edge sensor. The electronic device has a device body. The signal processing circuit operates in a sleep mode. The acceleration sensor senses an acceleration change of the body of the device to generate an acceleration sensing signal. The acceleration sensor determines whether the acceleration sensing signal is continuously less than the acceleration threshold for a preset length of time to wake up the signal processing circuit. When the acceleration sensor wakes up the signal processing circuit, the signal processor activates the edge sensor. The edge sensor senses a change in deformation of the body of the device to produce at least a deformation sensing signal. The signal processing circuit analyzes the deformation sensing signal to determine whether the device body has a falling event. In addition, a drop warning method has also been proposed.

Description

Electronic device and drop warning method

The present invention relates to an alerting technique, and more particularly to an electronic device having a drop warning function and a drop warning method.

When a mobile device falls from a user's clothing, a carry-on item, or a vehicle, the user usually has to wait until the next time to use it to find that the mobile device is lost. In the existing application, the user can issue a lock, turn on an audible alarm, clear the memory data and the like through the communication network, and query the current location of the device to find the device by using a positioning technology such as GPS built in the mobile device. However, in the process of losing the mobile device to the user's discovery and remote treatment or recovery, there will inevitably be an empty window period. However, the longer the empty window period, the higher the probability of data leakage from the mobile device and the lower the probability of recovery. Moreover, the user has to face the risk of the communication network being disconnected or the mobile device losing power and unable to do any disposal. In view of this, the present invention will set forth the solutions of several embodiments below.

The present invention provides an electronic device having a function of automatically generating a drop warning signal.

The electronic device of the present invention has a device body, and the electronic device includes a signal processing circuit, an acceleration sensor, and at least one edge sensor. The signal processing circuit operates in a sleep mode. The acceleration sensor is coupled to the signal processing circuit. The acceleration sensor is configured to sense an acceleration change of the device body to generate an acceleration sensing signal. The acceleration sensor determines whether the acceleration sensing signal is continuously less than the acceleration threshold for a preset length of time to wake up the signal processing circuit.

A drop warning method of the present invention is applicable to an electronic device. The electronic device includes a device body, and the method includes the steps of: operating the signal processing circuit in a sleep mode; sensing an acceleration change of the device body by the acceleration sensor to generate an acceleration sensing signal, and determining by the acceleration sensor Whether the acceleration sensing signal is continuously smaller than the acceleration threshold for a preset time length to wake up the signal processing circuit; when the acceleration sensor wakes up the signal processing circuit, the at least one edge sensor is activated by the signal processor, and Distoring the deformation of the apparatus body by at least one edge sensor to generate at least one deformation sensing signal; and analyzing the at least one deformation sensing signal by the signal processing circuit to determine whether the device body has a falling event.

Based on the above, the electronic device and the drop warning method of the present invention can effectively determine whether a device body of the electronic device has a falling event by using an acceleration sensor, an edge sensor, and a signal processing circuit, so as to promptly generate a warning signal to remind user.

The above described features and advantages of the invention will be apparent from the following description.

In order to make the content of the present invention easier to understand, the following specific embodiments are examples of the invention that can be implemented. In addition, wherever possible, the same elements, components, and steps in the drawings and embodiments are used to represent the same or similar components.

1 is a block diagram of an electronic device in accordance with an embodiment of the present invention. Referring to FIG. 1 , the electronic device 100 includes a signal processing circuit 110 , an acceleration sensor 120 , and an edge sensor 130 . The signal processing circuit 110 is coupled to the acceleration sensor 120 and the edge sensor 130. In the present embodiment, the signal processing circuit 110 is previously operated in a sleep mode, and the acceleration sensor 120 senses an acceleration change of the device body of the electronic device 100 to generate an acceleration sensing signal. In this embodiment, the acceleration sensor 120 determines whether to wake up the signal processing circuit 110 by determining whether the acceleration sensing signal is continuously less than the acceleration threshold value for a preset length of time.

Specifically, when the acceleration sensor 120 determines that the acceleration sensing signal is continuously less than the acceleration threshold for a preset length of time, the acceleration sensor 120 immediately wakes up the signal processing circuit 110 to cause the signal processing circuit 110 to activate the edge sense. Detector 130. In the embodiment, the edge sensor 130 senses a deformation change of the device body of the electronic device 100 to generate a deformation sensing signal. The edge sensor 130 outputs the deformation sensing signal to the signal processing circuit 110, so that the signal processing circuit 110 determines whether the device body of the electronic device 100 has a falling event by analyzing the deformation sensing signal, and further generates an alert signal. In other words, when the acceleration sensor 120 does not determine that the acceleration sensing signal is continuously less than the acceleration threshold for a preset length of time, the acceleration sensor 120 does not wake up the signal processing circuit 110. Moreover, if the signal processing circuit 110 determines that the device body of the electronic device 100 has not dropped, the signal processing circuit 110 returns to the sleep mode. That is to say, the electronic device 100 of the present embodiment has a function of judging whether or not a drop event occurs and saving power consumption.

In this embodiment, the electronic device 100 can be, for example, a mobile phone, a tablet PC, a wearable device, a portable device, or a notebook, and the like. Mobile electronic device. In this embodiment, the signal processing circuit 110 is, for example, a central processing unit (CPU), a system on chip (SOC), or other programmable general purpose or special purpose microprocessor ( Microprocessor, Digital Signal Processor (DSP), Programmable Controller, Application Specific Integrated Circuits (ASIC), Programmable Logic Device (PLD), and the like Processing device or a combination of these devices. Signal processing circuit 110 may perform signal analysis, processing, and arithmetic functions to implement the methods described in various embodiments of the present invention.

In the present embodiment, the acceleration sensor 120 is, for example, a gravity sensor (G-sensor). The acceleration sensor 120 can be used to sense an acceleration value of a single axis or multiple axes, and has a function of determining the magnitude of the acceleration value. For example, the acceleration sensor 120 may be disposed inside the device body, and correspondingly generate an acceleration sensing signal according to the displacement condition of the device body. The acceleration sensing signal may include an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis acceleration value. And, when the acceleration sensor 120 determines that the X-axis acceleration value, the Y-axis acceleration value, and the Z-axis acceleration value are continuously smaller than the acceleration threshold value for a preset time length, the acceleration sensor 120 wakes up the signal processing circuit 110.

In the present embodiment, when the device body of the electronic device 100 is in the event of a drop event, since the device body has an inertial acceleration during the drop, the X-axis acceleration value and the Y-axis acceleration measured by the acceleration sensor 120 are obtained. The value and the Z-axis acceleration value should ideally be zero. However, the embodiment further considers that the acceleration value actually measured by the acceleration sensor 120 may have some slight error. Therefore, the acceleration sensor 120 of the embodiment is designed to be an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis. When the acceleration value is continuously lower than the acceleration threshold value for a preset time length, the acceleration sensor 120 determines that the electronic device 100 may be in a falling event. Thus, in an embodiment, the acceleration sensor 120 can further include a comparator and a controller. The comparator is configured to compare the acceleration threshold value and the acceleration sensing signal to output a comparison result to the controller. Moreover, when the controller determines that the acceleration sensing signal is continuously less than the acceleration threshold for a preset length of time, the controller may output a wake-up signal to the signal processing circuit to wake up the signal processing circuit.

In this embodiment, the edge sensor 130 can be, for example, a balanced bridge structure composed of a plurality of varistors, wherein the balanced bridge structure can be, for example, a Wheatstone bridge. The edge sensor 130 can generate a corresponding digital value according to a change in the voltage value as a deformation sensing signal. In this embodiment, the edge sensor 130 can be disposed at a specific frame position of the device body of the electronic device 100 to sense whether the specific frame position of the device body of the electronic device 100 is deformed by pressure.

For example, in an embodiment, the electronic device 100 can be, for example, a mobile phone device. When the user places the electronic device 100 in a position such as a backpack or a pocket, since the electronic device 100 is not in an operated state, the electronic device 100 may operate in a sleep state (except for the acceleration sensor 120). However, if the electronic device 100 is dropped, the electronic device 100 can automatically determine whether a drop event occurs to wake up the electronic device 100. Therefore, the electronic device 100 can immediately issue an alert to inform the user or execute the related protection program, and the present invention is not limited thereto.

2 is a block diagram of an electronic device according to another embodiment of the present invention. Referring to FIG. 2, the electronic device 200 includes a signal processing circuit 210, an acceleration sensor 220, and a plurality of edge sensing modules 230_1, 230_2 230 230_N, where N is a positive integer greater than zero. In this embodiment, the edge sensing modules 230_1, 230_2 230 230_N can be disposed at a plurality of frame positions of the device body of the electronic device 200, for example, so that the frame positions of the device body of the electronic device 200 can be formed. Sensing areas. Moreover, the edge sensing modules 230_1, 230_2 230 230_N may further include edge sensors C1_1, C1_2~C1_M, C2_1, C2_2~C2_M, CN_1, CN_2~CN_M, respectively, where M is a positive integer greater than zero. That is to say, in the embodiment, the device body of the electronic device 200 can be configured with a plurality of sensing regions to increase the accuracy and acuity of determining whether the device body has a falling event. The sensing regions may be, for example, an upper side, a lower side, a left side, a right side, an upper left corner, an upper right corner, a lower left corner, a lower right corner, a front side, or a back side of the apparatus body of the electronic device 200, and the present invention does not limit. Incidentally, when the electronic device 200 operates in the normal mode, the edge sensing modules 230_1, 230_2 230 230_N may be applied to related operational functions or software applications of the electronic device 200.

In this embodiment, the signal processing circuit 210 includes a signal processor 211, an Analog-to-Digital Converter (ADC) 212, a multiplexer 213, a filter 214, and an amplifier ( Amplifier) 215 and Clock Generator 216. In this embodiment, the multiplexer 213 is coupled to the edge sensors C1_1, C1_2~C1_M, C2_1, C2_2~C2_M, CN_1, CN_2~CN_M. The multiplexer 213 receives the deformation sensing signals respectively provided by the edge sensors C1_1, C1_2~C1_M, C2_1, C2_2~C2_M, CN_1, CN_2~CN_M, and outputs the deformation sensing signals having the same sampling length to Filter 214 and amplifier 215. In this embodiment, the filter 214 is used to filter the deformation sensing signal to eliminate noise. The amplifier 215 is used to amplify the filtered deformation sensing signal to increase the signal strength. In the present embodiment, the analog to digital converter 212 converts the analog form of the distortion sensing signal into a digital form and outputs it to the signal processor 211. In the present embodiment, the clock generator 216 can provide a plurality of clock signals to analog to the digital converter 212, the multiplexer 213, and the amplifier 215 to synchronize the operational timing of these circuit elements.

In this embodiment, the signal processor 211 can be, for example, a Digital Signal Processor (DSP), a System-on-a-Chip (SoC), or an Application Specific Integrated Circuit (Application Specific Integrated Circuit). ASIC) and the like processing circuits. The signal processor 211 can analyze the converted deformation sensing signal to determine whether a drop event has occurred in the device body. Moreover, when the signal processor 211 determines that the device body has a drop event, the signal processor 211 may further output an alert signal to other functional circuit components or applications of the electronic device 200 to perform a preset alert function.

It should be noted that the number of edge sensing modules and edge sensors of the present invention is not limited to that shown in FIG. 2. In an embodiment, the electronic device 200 may include only a single edge sensor to determine whether a particular side of the device body of the electronic device 200 is deformed by the single edge sensor. Further, the signal processing circuit 210 may not be configured with the multiplexer 213. The signal processing circuit 210 can directly receive the deformation sensing signal provided by the single edge sensor. In addition, in another embodiment, the electronic device 200 may also not configure the filter 214 and the amplifier 215 to directly receive the deformation sensing signal via the analog to digital converter 212. That is, the electronic device 200 of the present embodiment can selectively set the multiplexer 213, the filter 214, the amplifier 215, and the clock generator 216 according to different device requirements, product designs, or circuit configurations.

FIG. 3 is a schematic diagram of an electronic device according to an embodiment of the invention. Referring to FIG. 3, in the embodiment, the electronic device 300 is a mobile phone device. The left side LS frame of the device body 300B of the electronic device 300 is provided with a plurality of edge sensors S1, S2, S3, and the right RS frame of the device body 300B is provided with a plurality of edge sensors S4, S5, S6. In the present embodiment, the device body 300B of the electronic device 300 is provided with a signal processing circuit and an acceleration sensor as described in the above embodiment of FIG. 1 or FIG. In the embodiment, when the electronic device 300 performs normal operation, the edge sensors S1 S S6 can be used to provide a user with a pressing or touch operation in response to the related application function of the electronic device 300.

4 is a schematic diagram of an acceleration sensing signal according to an embodiment of the invention. Referring to FIG. 3 and FIG. 4 , in the embodiment, when the electronic device 300 performs the normal mode, the acceleration sensor of the electronic device 300 may sense the acceleration variation of the device body 300B of the electronic device 300 . For example, the acceleration sensor of the electronic device 300 can sense the acceleration sensing signal as shown in FIG. In the present embodiment, the acceleration sensing signal may include an X-axis acceleration value Ax, a Y-axis acceleration value Ay, and a Z-axis acceleration value Az. Also, when the user uses the electronic device 300 normally and fixedly, the device body 300B does not undergo a severe displacement. Therefore, the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az can all be lower values.

FIG. 5 is a schematic diagram of a deformation sensing signal according to an embodiment of the invention. FIG. 6 is a schematic diagram showing a variation of a slope change according to an embodiment of the present invention. Referring to FIG. 3, FIG. 5 and FIG. 6, in the embodiment, when the electronic device 300 performs the normal mode, the edge sensors S1 S S6 can be used to provide a user with a pressing or touch operation to execute the electronic device. 300 related application features. Therefore, the edge sensors S1 S S6 of the electronic device 300 can sense a plurality of deformation sensing signals as shown in FIG. 5 . In this embodiment, when the user does not normally control the edge sensors S1 S S6 or the electronic device 300 to be in a resting state, the deformation sensing signals of the edge sensors S1 S S6 are not obvious. The digital value changes. In this embodiment, when the user holds the edge sensors S1 S S6, the deformation sensing signals of the edge sensors S1 S S6 can be respectively different according to the degree of pressing of the user. Obvious digital value changes.

Moreover, in the embodiment, the signal processing circuit can analyze the deformation sensing signals provided by the edge sensors S1 S S6 to obtain the slope variation distribution of the deformation sensing signals as shown in FIG. 6 , wherein FIG. 6 The slope value shown can be determined by dividing the digit value by the time value (digit value/time value). In the present embodiment, these slope values of the deformation sensing signals corresponding to the edge sensors S1 to S6 are sequentially changed with the degree of pressing.

FIG. 7 is a flow chart of a drop warning method according to an embodiment of the present invention. The drop warning method of this embodiment can be applied to the electronic device of the embodiment of FIGS. 1 to 3. Referring to FIG. 3 and FIG. 7, in the embodiment, the electronic device 300 is a mobile phone device. The left side LS frame of the device body 300B of the electronic device 300 is provided with a plurality of edge sensors S1 S S3, and the right RS frame of the device body 300B is provided with a plurality of edge sensors S4 S S6. In the present embodiment, the device body 300B of the electronic device 300 is provided with the signal processing circuit and the acceleration sensor as described in the above embodiment of FIG. 1 or FIG. 2, so that the electronic device 300 can perform the following steps.

In step S701, the electronic device 300 operates the signal processing circuit (signal processor) in the sleep mode. In this embodiment, the signal processing circuit of the electronic device 300 and the edge sensors S1 S S6 are pre-operated in the sleep mode, but the acceleration sensor of the electronic device 300 is continuously operated, so that the electronic device 300 can be accelerated. The sensor immediately determines whether the acceleration sensing signal is less than the acceleration threshold. If yes, step S703 is executed, and the acceleration sensor of the electronic device 300 further determines whether the acceleration sensing signal continues for a preset time length less than the acceleration threshold. If not, the electronic device 300 proceeds to step S701. In this embodiment, the acceleration threshold value may be, for example, 0.1 (m/s ² ), 1 (m/s ² ), or 2 (m/s ² ), etc., and the preset time length may be, for example, 0.1 milliseconds (ms). , 1 millisecond (ms), 10 milliseconds (ms). The acceleration threshold and the preset time length may be determined according to different device requirements or product designs, and the invention is not limited thereto.

In step S703, when the acceleration sensor of the electronic device 300 determines that the acceleration sensing signal continues for a preset time length less than the acceleration threshold value. The electronic device 300 performs step S704. In step S704, the acceleration sensor of the electronic device 300 wakes up the signal processing circuit. In step S705, the signal processing circuit activates the plurality of edge sensors S1 to S6 to sense the degree of deformation of the plurality of sensing regions of the device body 300B. In step S706, the signal processing circuit of the electronic device 300 can time-sample the edge sensors S1 S S6 through the multiplexer to obtain a plurality of deformation sensing signals. In step S707, the signal processing circuit of the electronic device 300 can filter and enhance the deformation sensing signals by filters and amplifiers. In step S708, the signal processing circuit of the electronic device 300 can convert the deformation sensing signals by analog to digital converters to convert the deformation sensing signals from analog signals to digital signals. In step S709, the signal processing circuit of the electronic device 300 can analyze the deformation sensing signals by a signal processor. In step S710, the signal processor of the electronic device 300 can determine whether the device body 300B of the electronic device 300 has a drop event according to the analysis result of the deformation sensing signals. And, in step S711, the signal processing circuit of the electronic device 300 can output an alert signal.

In addition, related device features, technical details, and implementation manners of the electronic device 300 of the present embodiment can be sufficiently taught, suggested, and implemented in the above-described embodiments of FIG. 1 to FIG. However, in order to enable those skilled in the art to further understand the specific signal analysis and determination manner of step S709 and step S710, the following is exemplified by FIG. 8 to FIG.

FIG. 8 is a schematic diagram of an acceleration sensing signal according to another embodiment of the present invention. Referring to FIG. 3, FIG. 7, and FIG. 8, in the embodiment, the acceleration sensor of the electronic device 300 can sense the acceleration sensing signal as shown in FIG. In the present embodiment, the acceleration sensing signal may include an X-axis acceleration value Ax, a Y-axis acceleration value Ay, and a Z-axis acceleration value Az. For example, when the user carries the electronic device 300 in the X-axis direction (Normal state), the X-axis acceleration value Ax may be a specific value, and the Y-axis acceleration value Ay and the Z-axis acceleration value Az are approximately zero. However, when the electronic device 300 has a free fall movement state, since the device body 300B of the electronic device 300 has inertial acceleration during the drop, the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis The acceleration value Az may be approximately zero. Therefore, the acceleration sensor of the electronic device 300 can immediately determine whether the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az are simultaneously continuously smaller than the acceleration threshold value for a preset time length. If so, the acceleration sensor wakes up the signal processing circuit. Moreover, when the device body 300B of the electronic device 300 falls to the ground (Strike state), the acceleration sensor can sense a sharp acceleration value change, so the X-axis acceleration value Ax and the Y-axis acceleration value Ay at the moment of falling And the Z-axis acceleration value Az has a large amplitude change. In other words, in an embodiment, the electronic device 300 can further determine whether the occurrence of the value of the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az provided by the acceleration sensor. Drop event.

FIG. 9 is a schematic diagram of a deformation sensing signal according to another embodiment of the present invention. FIG. 10 is a schematic diagram showing a variation of a slope change according to another embodiment of the present invention. Referring to FIG. 3, FIG. 7, FIG. 9, and FIG. 10, in the embodiment, when the signal processing circuit of the electronic device 300 is awakened, the edge sensors S1 S S6 can be used for sensing the corresponding sensing of the device body 300B. The deformation of the position of the border of the area changes. For example, when the user carries the electronic device 300 in a moving state or a non-moving state (Normal state), the plurality of deformation sensing signals sensed by the edge sensors S1 S S6 have no significant change. Moreover, when the electronic device 300 has a free fall movement state, since the device body 300B of the electronic device 300 is deformed without being subjected to pressure during the falling, the edge sensors S1 to S6 sensed. These deformation sensing signals still have no significant changes. However, when the device body 300B of the electronic device 300 falls to the ground (Strike state), the edge sensors S1 to S6 can respectively sense different and severe deformation changes. Especially at the moment when the device body 300B falls to the ground, these edge sensors S1 to S6 can sense instantaneous digital value changes.

In the present embodiment, the signal processing circuit can analyze the deformation sensing signals provided by the edge sensors S1 to S6 to obtain the slope variation distribution of the deformation sensing signals as shown in FIG. For example, the position of the bezel corresponding to the edge sensor S1 may be the first contact position of the device body 300B with the ground, so the deformation sensing signal sensed by the edge sensor S1 is at the moment when the device body 300B falls to the ground. Has a dramatic digital value change. That is, the signal processor of the electronic device 300 can determine whether at least one of the slope change distributions corresponding to the edge sensors S1 S S6 has a slope value whose slope change amount per unit time is greater than a slope threshold value, to It is judged that the device body 300B has a drop event. For example, as shown in FIG. 10, the signal processor can determine whether the slope change corresponding to at least one of the edge sensors S1 S S6 between time point 3 and time point 4 is greater than a slope threshold value. Wherein the slope threshold value can be, for example, 10000 or 20000. Therefore, the signal processor of the electronic device 300 can accurately judge that the device body 300B falls to the ground to further output an alert signal.

Moreover, in an embodiment, the electronic device 300 may further have a function of adjusting the slope threshold value described above. For example, since the electronic device 300 may be accidentally touched by the user when the user is lightly throwing, playing, or exerting force, the electronic device 300 may misjudge the occurrence of the falling event to generate an alert signal. Therefore, in another embodiment, the signal processor of the electronic device 300 can analyze the rising and falling slopes of the deformation sensing signal, and can be used together with the learning mechanism for judging the magnitude of the signal, calculating the free fall motion time, and the user's usage behavior. To improve the accuracy of the deformation sensing signal analysis. For another example, the signal processor of the electronic device 300 can provide a confirmation message to the user each time an alarm signal is generated to provide feedback through the user and confirm whether a drop event actually occurs. Therefore, the signal processor of the electronic device 300 can record a plurality of events to integrate the analysis to determine whether the magnitude of the slope threshold is too high or too low, so as to adjust the slope threshold by means of automatic learning, thereby improving the signal of the electronic device 300. The processor determines the accuracy of the drop event.

FIG. 11 is a flow chart of a drop warning method according to another embodiment of the present invention. Referring to Figures 1 and 11, the drop warning method of the present invention can be applied at least to the electronic device 100 of the embodiment of Figure 1. In step S1110, the electronic device 100 operates the signal processing circuit 110 in the sleep mode. In step S1120, the electronic device 100 senses the acceleration change of the device body by the acceleration sensor 120 to generate an acceleration sensing signal. Moreover, the electronic device 100 determines whether the acceleration sensing signal is continuously smaller than the acceleration threshold value for a preset time length by the acceleration sensor 120 to wake up the signal processing circuit 110. In step S1130, when the acceleration sensor 120 wakes up the signal processing circuit 110, the electronic device 100 activates the edge sensor 130 by the signal processor 110, and senses the deformation change of the device body by the edge sensor 130. To generate a deformation sensing signal. In step S1140, the electronic device 100 analyzes the deformation sensing signal by the signal processing circuit 110 to determine whether a drop event occurs in the device body. Therefore, the electronic device 100 of the present embodiment simultaneously has a function of determining whether or not a drop event occurs and saving power consumption.

In addition, related device features, technical details, and implementation manners of the electronic device 100 of the present embodiment can be sufficiently taught, suggested, and implemented in the above-described embodiments of FIGS. 1 to 10, and thus will not be described again.

In summary, the electronic device and the drop warning method of the present invention can effectively determine whether a device body of the electronic device has a falling event. When the acceleration sensor of the electronic device determines that a drop event may occur, the signal processing circuit of the electronic device and the edge sensor are awakened for further acceleration sensing and signal analysis, so that the electronic device can accurately Check if a drop event occurs and the warning signal can be output immediately. In addition, the electronic device and the drop warning method of the present invention also have the function of saving power consumption of the signal processing circuit and the edge sensor.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 300‧‧‧ electronic devices
110, 210‧‧‧ Signal Processing Circuit
120, 220‧‧‧ Acceleration sensor
130, C1_1, C1_2, C1_M, C2_1, C2_2, C2_M, CN_1, CN_2, CN_M, S1, S2, S3, S4, S5, S6‧‧‧ edge sensor
211‧‧‧Signal Processor
212‧‧‧ Analog to Digital Converter
213‧‧‧Multiplexer
214‧‧‧ filter
215‧‧Amplifier
216‧‧‧ clock generator
230_1, 230_2, 230_N‧‧‧ edge sensing module
300B‧‧‧ device body
Ax‧‧‧X-axis acceleration value
Ay‧‧‧Y-axis acceleration value
Az‧‧‧Z-axis acceleration value
LS‧‧‧left side
RS‧‧‧right
S701, S702, S703, S704, S705, S706, S707, S708, S709, S710, S711, S1110, S1120, S1130, S1140‧‧ steps

1 is a block diagram of an electronic device in accordance with an embodiment of the present invention. 2 is a block diagram of an electronic device according to another embodiment of the present invention. FIG. 3 is a schematic diagram of an electronic device according to an embodiment of the invention. 4 is a schematic diagram of an acceleration sensing signal according to an embodiment of the invention. FIG. 5 is a schematic diagram of a deformation sensing signal according to an embodiment of the invention. FIG. 6 is a schematic diagram showing a variation of a slope change according to an embodiment of the present invention. FIG. 7 is a flow chart of a drop warning method according to an embodiment of the present invention. FIG. 8 is a schematic diagram of an acceleration sensing signal according to another embodiment of the present invention. FIG. 9 is a schematic diagram of a deformation sensing signal according to another embodiment of the present invention. FIG. 10 is a schematic diagram showing a variation of a slope change according to another embodiment of the present invention. FIG. 11 is a flow chart of a drop warning method according to another embodiment of the present invention.

Claims (16)

An electronic device, comprising: a device body, comprising: a signal processing circuit, operating in a sleep mode; an acceleration sensor coupled to the signal processing circuit for sensing an acceleration change of the device body to generate an acceleration a sensing signal, wherein the acceleration sensor determines whether the acceleration sensing signal is continuously less than an acceleration threshold for a predetermined length of time to wake up the signal processing circuit; and at least one edge sensor coupled to the a signal processor, when the acceleration sensor wakes up the signal processing circuit, the signal processor activates the at least one edge sensor, wherein the at least one edge sensor is configured to sense a deformation change of the device body to generate at least A deformation sensing signal, wherein the signal processing circuit analyzes the at least one deformation sensing signal to determine whether a drop event occurs in the device body. The electronic device of claim 1, wherein the signal processing circuit generates an alert signal if the signal processing circuit determines that the device body has the drop event, and if the signal processing circuit determines that the device body is not When the drop event occurs, the signal processing circuit re-operates in the sleep mode. The electronic device of claim 1, wherein the acceleration sensor is disposed in the device body, and the acceleration sensing signal comprises an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis acceleration value. When the acceleration sensor determines that the X-axis acceleration value, the Y-axis acceleration value, and the Z-axis acceleration value are simultaneously less than the acceleration threshold value for the preset time length, the acceleration sensor wakes up the Signal processing circuit. The electronic device of claim 1, wherein the acceleration sensor comprises a comparator and a controller, and the comparator is configured to compare the acceleration threshold value and the acceleration sensing signal to output a comparison result. To the controller, when the controller determines that the acceleration sensing signal is continuously less than the acceleration threshold for a predetermined length of time, the controller outputs a wake-up signal to the signal processing circuit. The electronic device of claim 1, wherein the at least one edge sensor is a balanced bridge structure composed of a plurality of piezoresistors, and the at least one edge sensor is disposed on the device body At least one border position. The electronic device of claim 1, wherein the signal processing circuit comprises: an analog to digital converter coupled to the at least one deformation sensing signal for receiving the at least one deformation sensing signal and converting The at least one deformation sensing signal; and a signal processor coupled to the analog to digital converter for receiving the converted at least one deformation sensing signal and analyzing the converted at least one deformation sensing signal, To determine whether the device body has the drop event. The electronic device of claim 6, wherein the signal processor analyzes the converted at least one deformation sensing signal to obtain a slope change distribution having a plurality of slope values, and the signal processor determines the Whether the slope value has a slope change amount greater than a slope threshold value to determine that the device body has the drop event. The electronic device of claim 6, wherein the signal processing circuit further comprises: a multiplexer coupled to the at least one edge sensor for receiving the at least one deformation sensing signal in a time-sharing manner, and The at least one deformation sensing signal having the same sampling length is output, wherein the number of the at least one edge sensor is plural. A drop warning method is applicable to an electronic device, and the electronic device includes a device body, the method comprising: operating a signal processing circuit in a sleep mode; sensing an acceleration of the device body by an acceleration sensor Changing to generate an acceleration sensing signal, and determining, by the acceleration sensor, whether the acceleration sensing signal is continuously less than an acceleration threshold for a predetermined length of time to wake up the signal processing circuit; When the sensor wakes up the signal processing circuit, the signal processor activates at least one edge sensor, and the deformation of the device body is sensed by the at least one edge sensor to generate at least one deformation sensing And analysing the at least one deformation sensing signal by the signal processing circuit to determine whether a drop event occurs in the device body. The drop warning method of claim 9, further comprising: if the signal processing circuit determines that the device body has the drop event, generating a warning signal by the signal processing circuit; and if the signal processing The circuit determines that the drop event does not occur in the device body, and the signal processing circuit re-operates in the sleep mode. The drop warning method of claim 9, wherein the acceleration sensor is disposed in the apparatus body, and the acceleration sensing signal comprises an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis. And an acceleration value, wherein the acceleration sensor determines whether the acceleration sensing signal is continuously smaller than the acceleration threshold in the preset time length, and the step of waking up the signal processing circuit comprises: when the acceleration sensor determines The X-axis acceleration value, the Y-axis acceleration value, and the Z-axis acceleration value are simultaneously awakened by the acceleration sensor by the acceleration sensor when the acceleration threshold is continuously less than the acceleration threshold. The drop warning method of claim 9, wherein the acceleration sensor comprises a comparator and a controller, wherein the acceleration sensor determines whether the acceleration sensing signal is at the preset time The step of continuously decreasing the length of the acceleration threshold to wake up the signal processing circuit includes: comparing, by the comparator, the acceleration threshold and the acceleration sensing signal to output a comparison result to the controller; When the controller determines that the acceleration sensing signal is continuously less than the acceleration threshold for a predetermined length of time, the controller outputs a wake-up signal to the signal processing circuit. The drop warning method of claim 9, wherein the at least one edge sensor is a balanced bridge structure composed of a plurality of piezoresistors, and the at least one edge sensor is disposed in the device At least one border position of the body. The drop warning method of claim 9, wherein the signal processing circuit comprises an analog to digital converter and a signal processor, wherein the at least one deformation sensing signal is analyzed by the signal processing circuit to The step of determining whether the device body has the drop event comprises: receiving the at least one deformation sensing signal by the analog-to-digital converter, and converting the at least one deformation sensing signal; and receiving the signal by the signal processor Converting the at least one deformation sensing signal, and analyzing the converted at least one deformation sensing signal to determine whether the falling event occurs in the device body. The drop warning method of claim 14, wherein the converted at least one deformation sensing signal is received by the signal processor, and the converted at least one deformation sensing signal is analyzed to determine the The step of whether the device body has the drop event comprises: analyzing the converted at least one deformation sensing signal by the signal processor to obtain a slope change distribution having a plurality of slope values; and using the signal processor It is determined whether the slope values have a slope change amount greater than a slope threshold value to determine that the device body has the drop event. The drop warning method of claim 14, wherein the signal processing circuit further comprises a multiplexer, and the number of the at least one edge sensor is plural, wherein the at least one edge sensing The step of sensing the deformation of the apparatus body to generate the at least one deformation sensing signal comprises: receiving the at least one deformation sensing signal by the multiplexer in time division, and outputting the at least one having the same sampling length Deformation sensing signal.