Energy recovery circuit and power supply system including same

Abstract

The present disclosure may provide an energy recovery circuit including: a summation circuit that amplifies or sums power output from one or more vibration generators in response to vibration of a panel member; a rectifying circuit that rectifies an output signal of the summing circuit; and a charging circuit that charges the power output from the rectifying circuit.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0029767, filed on February 29, 2024, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to an energy recovery circuit connected to a vibrating device and a power supply system including the energy recovery circuit. Background Art

[0004] Vibration devices are devices that convert electrical signals into the vibrations of an object, or vice versa. They are widely used in various industrial fields, including user interfaces using haptic technology, speakers that output sound, vibration sensors, and piezoelectric sensors. Summary of the Invention

[0005] If the vibration energy of an object is recovered and used as driving power of a vibration device or driving power of other devices, power consumption of various systems connected to the vibration device can be improved and waste of resources can be reduced.

[0006] The present disclosure is directed to addressing the above-mentioned needs and / or problems.

[0007] The present disclosure provides an energy recovery circuit capable of recovering vibration energy and a power supply system including the energy recovery circuit.

[0008] The objects of the present disclosure are not limited to those mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

[0009] An energy recovery circuit according to one embodiment of the present disclosure may include: a summing circuit configured to amplify or sum the power output from one or more vibration generators in response to the vibration of the panel member; a rectifier circuit configured to rectify the output signal of the summing circuit; and a charging circuit configured to charge using the power output from the rectifier circuit.

[0010] According to another embodiment of the present disclosure, an energy recovery circuit may include: a summing and rectifying circuit configured to amplify or sum and rectify power output from a plurality of vibration generators in response to vibration of a panel member; and a charging circuit configured to charge using a DC voltage output from the summing and rectifying circuit.

[0011] According to another embodiment of the present disclosure, a power supply system may include: a panel member, on which a plurality of vibration generators are arranged; a control part, which is configured to control one or more first vibration generators in a vibration mode and one or more second vibration generators in an energy collection mode among the vibration generators arranged on the panel member; a plurality of driving parts, which are configured to vibrate the first vibration generators under the control of the control part and receive power output from the second vibration generators in response to the vibration of the panel member; and an energy recovery circuit, which is configured to charge using the power output from the second vibration generator through the driving part.

[0012] According to an embodiment of the present disclosure, vibration energy can be recovered by converting vibrations in a panel member into electrical signals without power consumption or heat generation, and the vibration energy can be used as driving power for a vibration generator or other electronic devices, thereby increasing the life of the system.

[0013] According to the embodiments of the present disclosure, the vibration of the panel member can be utilized as system driving power, thereby contributing to reducing resource waste and improving the environment.

[0014] The effects of the present disclosure are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent to those skilled in the art by describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0016] Figure 1 is a block diagram illustrating a power supply system according to an embodiment of the present disclosure;

[0017] Figure 2A and Figure 2B is a top view showing an example of a panel member according to an embodiment of the present disclosure;

[0018] Figure 3 is a flowchart illustrating a mode-specific control method of a power supply system according to an embodiment of the present disclosure;

[0019] Figure 4 is a diagram showing a configuration of a power supply system according to an embodiment of the present disclosure;

[0020] Figure 5 is a view showing a control portion and a plurality of driving portions according to an embodiment of the present disclosure;

[0021] Figure 6A and Figure 6B is shown for control Figure 5 A view of an example of a method of driving a portion as described in the drawings;

[0022] Figure 7 is a view showing a panel member sample for an application experiment to verify an energy recovery effect of a power supply system according to an embodiment of the present disclosure;

[0023] Figures 8A to 8D is a diagram showing characteristics of an input signal and an output signal of a first vibration generator driven in a vibration mode;

[0024] Figure 9 is shown by Figure 7 a view of a waveform of an electric signal output by a piezoelectric effect of a second vibration generator in the sample illustrated;

[0025] Figure 10 is a circuit diagram illustrating a summing and rectifying integrated circuit according to an embodiment of the present disclosure;

[0026] Figure 11 is a circuit diagram illustrating a summing and selection circuit according to an embodiment of the present disclosure;

[0027] Figure 12 is a view showing a vibration generator according to an embodiment of the present disclosure;

[0028] Figure 13 is shown along Figure 12 A cross-sectional view of the cross-sectional structure of the vibration generator taken along line II';

[0029] Figure 14 is shown along Figure 12 A cross-sectional view of the cross-sectional structure of the vibration generator taken along line II-II';

[0030] Figure 15 is a view showing a vibration medium layer according to an embodiment of the present disclosure;

[0031] Figure 16 is a view showing a vibration medium layer according to another embodiment of the present disclosure; and

[0032] Figure 17 is a schematic diagram of a vibration generator according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] Advantages and features of the present disclosure and methods for achieving the same will be more clearly understood from the embodiments described below with reference to the accompanying drawings.

[0034] The shapes, sizes, ratios, angles, numbers, etc. shown in the accompanying drawings for describing the embodiments of the present disclosure are merely examples, and the present disclosure is not limited thereto. Throughout this specification, the same reference numerals generally represent the same elements. In addition, when describing the present disclosure, detailed descriptions of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure.

[0035] Terms such as “comprising,” “including,” “having,” and “including” used herein are generally intended to allow the addition of other components unless these terms are used with the term “only.” Any reference to the singular may include the plural unless expressly stated otherwise.

[0036] Components are interpreted as including the normal error coverage even if not explicitly stated.

[0037] When describing the position or interconnection relationship between two components, such as "on", "over", "below", "beside", "connected or coupled to", "crossing", "intersecting", etc., unless "immediately" or "directly" is used, one or more other components may be inserted between them.

[0038] When describing a temporal precedence relationship, such as "after," "following," "next," "before," etc., unless "immediately" or "directly" is used, it may not be continuous on a temporal basis.

[0039] In the description of this embodiment, the terms "first," "second," etc. may be used to distinguish between elements, but the function or structure of a component is not limited by the ordinal number or component name preceding the component. Therefore, the first element mentioned herein may also be the second element within the technical concept of the present disclosure.

[0040] Like reference numerals refer to like elements throughout the specification.

[0041] The following embodiments may be partially or completely combined or combined with each other, and may be linked and operated in various technical ways. The embodiments may be performed independently of each other or in association with each other.

[0042] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0043] Figure 1 is a block diagram illustrating a power supply system according to an embodiment of the present disclosure. Figure 2A and Figure 2B is a top view showing an example of a panel member.

[0044] Reference Figures 1 to 2BThe power supply system 100 may be electrically connected to a plurality of vibration generating parts 210 and 220. The vibration generating parts 210 and 220 may be provided on a vibration propagation medium 300. The vibration propagation medium 300 may be a vibration plate, a panel member, or a vibration member, but the embodiments of the present disclosure are not limited thereto.

[0045] The power supply system 100 can independently control the vibration generating parts 210 and 220 to operate in a vibration mode (driving mode) or an energy harvesting mode. The power supply system 100 may include a driving part, an energy recovery circuit, a charging circuit, etc., but the embodiments of the present disclosure are not limited thereto.

[0046] When vibration occurs, for example, when a touch input or an input audio signal is detected, the power supply system 100 can generate and amplify a vibration signal and apply it to at least one of the vibration generating parts 210 and 220 selected for operation in the vibration mode. The vibration signal input to the vibration generating parts 210 and 220 in the vibration mode may be, but is not limited to, an electrical signal having a vibration frequency, such as a tactile signal or an audio signal. When a touch input from a user's finger or a pen is detected, the vibration signal is present in the vibration generating parts 210 and 220. Figure 2A and Figure 2B The first vibration generating portion 210 at the touch input position shown may operate in a vibration mode to generate vibration. When the touch input position changes, the operation mode of each of the first vibration generating portion 210 and the second vibration generating portion 220 may change. For example, when the touch input moves to the left (as shown in FIG. Figure 2A and Figure 2B ), some of the second vibration generating parts 220 may be controlled along the touch input position to function as the first vibration generating parts 210 operating in the vibration mode.

[0047] The power supply system 100 can amplify (or sum) and rectify the electrical signals output from the vibration generating parts 210 and 220 selected for operation in the energy harvesting mode, and then supply them to the charging circuit to charge the battery of the charging circuit. The charging circuit may include a circuit for measuring (or detecting) the remaining battery capacity. By using the power charged in the battery, the power supply system 100 can generate a vibration signal to drive the vibration generating parts 210 and 220, or output an electrical signal to be used as a power source for another electrical device.

[0048] Each of the vibration generating sections 210 and 220 can operate in a vibration mode or an energy harvesting mode according to the control of the power supply system 100. Each of the vibration generating sections 210 and 220 can generate vibrations in the vibration mode according to the vibration signal applied from the power supply system 100. In the vibration mode, the vibration generating sections 210 and 220 can generate vibrations based on the inverse piezoelectric effect. In the energy harvesting mode, each of the vibration generating sections 210 and 220 can convert the vibrations transmitted from the vibration propagation medium 300 into an electrical signal and supply it to the power supply system 100 without generating vibrations. The vibration generating sections 210 and 220 selected to operate in the energy harvesting mode can output power in response to the vibrations of the vibration propagation medium 300 in a non-driving state where no vibration signal is input, thereby generating power without consuming power or generating heat. In the energy harvesting mode, the vibration generating sections 210 and 220 can output an electrical signal obtained from the vibrations transmitted through the vibration propagation medium 300 based on the piezoelectric effect.

[0049] In the following description, the first vibration generating portion 210 is described as a vibration generator that generates vibration in a vibration mode, and the second vibration generating portion 220 is described as a vibration generator that converts vibration into an electrical signal in an energy harvesting mode. However, aspects of the present disclosure are not limited thereto.

[0050] The vibration generating parts 210 and 220 may be a vibration element, a vibration generating element, a vibration membrane, a vibration generating membrane, a vibrator, a vibration generator, an active vibrator, an active vibration generator, an actuator, an exciter, a membrane actuator, a membrane exciter, an ultrasonic actuator, or an active vibration member. However, aspects of the present disclosure are not limited thereto.

[0051] The vibration propagation medium 300 can be a medium or material capable of propagating vibrations, such as but not limited to glass, metal or plastic. Hereinafter, the vibration propagation medium 300 is referred to as a "panel member". The panel member 300 can be but not limited to a rectangular panel having a length in the X-axis direction (or the first direction), a width in the Y-axis direction (or the second direction), and a thickness in the Z-axis direction (or the third direction). For example, at least a portion of the panel member 300 may include a curved outer edge, an acute angle / obtuse angle, etc., but the embodiments of the present disclosure are not limited thereto. The panel member 300 on which the vibration generating parts 210 and 220 are arranged can be a panel member for, but not limited to, a touch screen, a touchpad, a tactile device or a sound output device. At least a portion of the panel member 300 can overlap or be combined with a display panel of a display device.

[0052] Figure 3 is a flowchart illustrating a mode-specific control method of a power supply system.

[0053] Reference Figure 3 , the power supply system 100 may determine an operation mode of the vibration generating parts 210 and 220 ( S00 ).

[0054] The power supply system 100 can determine the first vibration generating part 210 for operation in vibration mode (S01) and determine the second vibration generating part 220 for operation in energy harvesting mode (S05). The power supply system 100 can control the first vibration generating part 210 to operate in vibration mode and simultaneously control the second vibration generating part 220 to operate in energy harvesting mode. When a touch input is detected, the vibration generator at the touch input location between the vibration generating parts 210 and 220 can be determined as the first vibration generating part 210 based on the touch input location. The power supply system 100 can generate a vibration signal by setting the frequency, phase, voltage value, etc. of the vibration signal to be input to the first vibration generating part 210 (S02). The power supply system 100 can amplify the vibration signal and apply it to the first vibration generating part 210 (S03). The first vibration generating part 210 can vibrate according to the vibration signal from the power supply system 100, and the panel member 300 can vibrate in association with the vibration of the first vibration generating part 210 (S04).

[0055] The second vibration generating part 220 can output an electrical signal according to the vibration transmitted through the panel member 300 (S06). The power supply system 100 can output or sample the AC waveform electrical signal by setting the sampling frequency and the reference voltage for the AC waveform electrical signal received from the second vibration generating part 220 (S06). The power supply system 100 can amplify the sampled electrical signal, rectify it, and convert it into a DC voltage (S07). The power supply system 100 can charge the battery of the charging circuit using the DC voltage obtained from the second vibration generating part 220 based on the result of measuring the remaining battery capacity (S08 and S09). If the battery is fully charged, the power supply system 100 can skip charging the battery.

[0056] Figure 4 is a view showing the configuration of a power supply system.

[0057] Reference Figure 4 , the power supply system 100 may include an energy recovery circuit 110 , a driving part 120 and a control part 130 , but the embodiments of the present disclosure are not limited thereto.

[0058] The control unit 130 can control the driving unit 120 and the energy recovery circuit 110 by generating control signals and power required for mode-specific operations of the driving unit 120 and the energy recovery circuit 110. Under the control of the control unit 130, a first voltage Vs can be output from an external power input, and an oscillation signal O_MN and switch control signals SO_MN and SI_MN can be output.

[0059] The driving part 120 may include a vibration driver 121, an amplifier 122, a first switching element SWMNO, and a second switching element SWMWI. In the vibration mode, the vibration driver 121 may amplify the vibration signal O_MN input from the control part 130 and supply it to the first switching element SWMNO. Figure 4 , the driving voltage Vp and the ground voltage Vn connected to the vibration driver 121 may be a driving voltage and a ground voltage of an amplifier, but embodiments of the present disclosure are not limited thereto.

[0060] The driving portion 120 may be electrically connected to M*N (M and N are positive integers) vibration generators P11 to PMN arranged on the panel member 300 individually or in groups to individually supply vibration signals O_MN to the vibration generators P11 to PMN.

[0061] The first switching element SWMNO may be turned on in response to the first switching control signal SO_MN. When the first switching element SWMNO is turned on, the vibration signal O_MN may be supplied to the vibration generators P11-PMN selected for operation in the vibration mode. The vibration signal O_MN may include a positive polarity signal and a negative polarity signal (or a ground voltage).

[0062] The second switching element SWMNI can be turned on in response to a second switching control signal SI_MN. When the second switching element SWMNI is turned on, the electrical signal I_MN output from one or more vibration generators P11 to PMN selected for operation in energy harvesting mode can be input to the amplifier 122. The electrical signal I_MN output from the vibration generators P11 to PMN operating in energy harvesting mode can be an AC waveform electrical signal, but the embodiments of the present disclosure are not limited thereto. The second switching element SWMNI can be connected to a sampling circuit to sample the AC waveform electrical signal.

[0063] The amplifier 122 may amplify the electric signal input through the second switching element SWMNI and supply it to the energy recovery circuit 110 .

[0064] The energy recovery circuit 110 may include a first summing circuit 111 , a rectifying circuit 112 , a charging circuit 113 , a voltage stabilizing circuit 114 , and a second summing circuit 115 , but embodiments of the present disclosure are not limited thereto.

[0065] The first summing circuit 111 may amplify the electrical signals received from the vibration generators P11 to PMN operating in the energy harvesting mode through the amplifier 122. The first summing circuit 111 may amplify the electrical signals by summing the AC waveform electrical signals received from the plurality of vibration generators P11 to PMN through the amplifier 122.

[0066] The rectifying circuit 112 may rectify the AC waveform electric signal input from the vibration generator controlled to operate in the energy harvesting mode to convert it into a DC signal. The charging circuit 113 may charge the battery using the DC voltage input through the rectifying circuit 112.

[0067] The voltage stabilizing circuit 114 may regulate the voltage charged in the battery of the charging circuit 113 to stabilize it to a desired voltage level and output the second voltage Vc. The voltage stabilizing circuit 114 may output the second voltage Vc output by the regulator, but is not limited thereto.

[0068] The second summing circuit 115 may output the first voltage Vs or output a result of adding the second voltage Vc to the first voltage Vs according to the control of the control unit 130. The voltage Vp output from the second summing circuit 115 may be applied to the vibration driver 121 as an amplifier driving voltage Vp of the vibration driver 121 for amplifying the vibration signal.

[0069] Figure 5 It is a view showing a control portion and a plurality of driving portions. Figure 6A and Figure 6B is shown for control Figure 5 A view of an example of a method of driving a portion is illustrated.

[0070] refer to Figures 5 to 6B , the power supply system 100 may include a plurality of driving parts DS11 to DS1N.

[0071] The driving parts DS11 to DS1N can be connected to the vibration generators P11 to P1N respectively, and each driving part can drive a single vibration generator in a vibration mode or an energy collection mode under the control of the control part 130. In another embodiment, the driving parts DS11 to DS1N can be connected to n (n is a positive integer greater than or equal to 2) vibration generators, and the vibration generators can be controlled in groups. For example, the first driving part DS11 can be connected to two to four vibration generators belonging to the first vibration generator group PG1, and can drive these vibration generators in a vibration mode or an energy collection mode under the control of the control part 130. Figure 5, reference symbols “ P11 to P1N” indicate individual vibration generators, and “ PG1 to PGn” indicate vibration generator groups each including a plurality of vibration generators.

[0072] The control part 130 may output switching control signals SO_11 to SO_1N and SI_11 to SI_1N to independently control the driving parts DS11 to DS1N. Figure 6A and Figure 6B As shown, the first switch control signals SO_11 to SO_1N may be generated as valid logic values, such as 1 (or high), in the vibration mode, and as invalid logic values, such as 0 (or low) in the energy harvesting mode. Figure 6A and Figure 6B As shown, the second switch control signals SI_11 to SI_1N may be generated as a valid logic value, such as 1 (or high), in the energy harvesting mode, and as an invalid logic value, such as 0 (or low), in the vibration mode.

[0073] The first driving portion DS11 may receive the first and second switching control signals SO_11 and SI_11 and the vibration signal O_11 from the control portion 130, and supply the electric signal I_11 obtained from the vibration of the panel member 300 to the energy recovery circuit 110. The Nth driving portion DS1N may receive the first and second switching control signals SO_1N and SI_1N and the vibration signal O_1N from the control portion 130, and supply the electric signal I_1N obtained from the vibration of the panel member 300 to the energy recovery circuit 110.

[0074] like Figure 6A and Figure 6B As shown, the control part 130 may control one or more of the driving parts DS11 to DS1N to operate in the vibration mode while controlling the other driving parts to operate in the energy harvesting mode.

[0075] exist Figure 6A In the example shown in FIG1 , the first driving portion DS11 can drive the corresponding vibration generator P11 or the vibration generators in the corresponding vibration generator group PG1 in the vibration mode in response to the switching control signals SO_11 and SI_11. At this time, the other driving portions DS12 and DS1N can drive the corresponding vibration generators P12 and P1N or the vibration generators in the corresponding vibration generator groups PG2 and PGn in the energy harvesting mode in response to the switching control signals SO_12, SO_1N, SI_12, and SI_1N.

[0076] exist Figure 6BIn the example shown in FIG1 , the second driving portion DS12 can drive the corresponding vibration generator P12 or the vibration generators in the corresponding vibration generator group PG2 in the vibration mode in response to the switching control signals SO_12 and SI_12. At this time, the other driving portions DS11 and DS1N can drive the corresponding vibration generators P11 and P1N or the vibration generators in the corresponding vibration generator groups PG1 and PGn in the energy harvesting mode in response to the switching control signals SO_11, SO_1N, SI_11, and SI_1N.

[0077] Figure 7 : is a view showing a panel member sample to which an experiment was applied to verify the energy recovery effect. Figure 7 , reference symbol “ P11 ” denotes a first vibration generator driven in a vibration mode, and “ P12 to P15 ” denote a plurality of second vibration generators driven in an energy harvesting mode. Figures 8A to 8D is a diagram showing characteristics of input and output signals of a first vibration generator driven in a vibration mode. Figures 8A to 8C In , the horizontal axis represents time (seconds), and the vertical axis represents the amplitude of vibration. Figure 8D , the horizontal axis represents frequency (Hertz (Hz)), and the vertical axis represents amplitude of vibration. Figure 9 is shown by Figure 7 A view of a waveform of an electric signal output by the piezoelectric effect of the second vibration generator in the illustrated sample.

[0078] Reference Figures 7 to 9 In this experiment, a vibration signal may be input to the first vibration generator P11, causing the first vibration generator P11 to vibrate due to the inverse piezoelectric effect. The vibration of the first vibration generator P11 may be transmitted to the second vibration generators P12 to P15 through the panel member 300 in association with the vibration.

[0079] The vibration signal s(t) may be modulated and input to the first vibration generator P11 as follows, wherein the vibration signal s(t) may be used as a tactile signal:

[0080] s(t)=Ac[1+μcos(2πf m t)]cos(2πf c t)

[0081] Where, Ac=0.5,μ=1,f m =150Hz, f c =60kHz.

[0082] Here, Ac is the amplitude of the carrier, f m is the modulation frequency, f c is the carrier frequency, t is time, and μ is the modulation depth. Figure 8A is the measured waveform of the 100Hz input signal before modulation, and Figure 8B It is the measured value of 30KHz carrier signal. Figure 8C is the measured waveform of the modulated signal s(t). V of the modulated vibration signal s(t) rms It is 0.43. Figure 8D is the frequency spectrum measured by Fast Fourier Transform (FFT).

[0083] like Figure 9 As shown, the input voltage of the first vibration generator P11 and the Vpp (peak-to-peak voltage) of the electrical signals output from the second vibration generators P12 to P14 through the piezoelectric effect were measured. Vpp is the voltage difference between the lowest and highest voltages of the AC signal. Based on the findings identified in this experiment, sufficient energy was recovered from the non-vibrating second vibration generators P12 to P15, and if the electrical signals output from the second vibration generators P12 to P15 were summed, the energy recovery effect could be further improved.

[0084] In the experiment, even when the panel member 300 is configured as a panel member of a sound output device, the energy recovery effect has been verified. The audible frequency can be in the range of 20Hz to 20000Hz, but the embodiments of the present disclosure are not limited thereto. When a 500Hz sinusoidal wave input signal (83.40Vpp) is input to the vibration generator P11 controlled in vibration mode, the Vpp measured values ​​of the vibration generators P12 to P15 controlled in energy collection mode are P12=214.9mVpp, P13=143.0mVpp, and P14=147.7mVpp. In the case of a 500Hz sinusoidal wave input, the reason why the electrical signal output from P14 is greater than P13 is because the position of P14 at 500Hz is an antinode. When a 1kHz sine wave input signal (83.22Vpp) was input to the first vibration generator P11, the Vpp measurement values ​​of the vibration generators P12 to P15 controlled in the energy harvesting mode were P12 = 187.1mVpp, P13 = 152.5mVpp, and P14 = 125.6mVpp. Therefore, even when the panel member 300 is used as a sound output device, the energy recovery effect is confirmed.

[0085] The summing circuit 111, the rectifier circuit 112 and the low-pass filter (LPF) of the energy recovery circuit 110 can be implemented as follows: Figure 10 The summing and rectification integrated circuit shown is implemented.

[0086] Figure 10 is a circuit diagram illustrating a summing and rectifying integrated circuit according to an embodiment of the present disclosure.

[0087] refer to Figure 10The summing and rectifying integrated circuit may include a summing circuit 111 , a rectifying circuit 112 and a low-pass filter 116 .

[0088] The summing circuit 111 may be implemented using an inverting summer. The summing circuit may include an operational amplifier OP1, resistors R1, R2, and R3 connected to an inverting input terminal (-) of the operational amplifier OP1, and a feedback resistor R connected between an output terminal and an inverting input terminal (-) of the operational amplifier OP1. F A reference voltage or a ground voltage may be applied to the non-inverting input terminal of the operational amplifier OP1. The output voltage V of the summing circuit 111 O1 Given by Equation 1.

[0089] Equation 1

[0090]

[0091] The input signals V1, V2 and V3 of the AC waveform output from the vibration generator controlled in the energy harvesting mode can be input to the inverting input terminal (-) of the operational amplifier OP1 through the resistors R1, R2 and R3. When the gain or amplification ratio is 1, that is, The output voltage VO1 is the simple sum V1 + V2 + V3 of the input signals V1, V2 and V3. By adjusting the amplification ratio of the summing circuit, the input signals can be summed in various forms to generate a sum signal.

[0092] The rectifier circuit 112 may be connected to the input terminal and the output terminal of the operational amplifier OP1. The rectifier circuit 112 may be implemented using a half-wave rectifier circuit integrated into the summing circuit. The rectifier circuit may include a first diode D1 and a second diode D2. The first diode D1 may include an anode electrode connected to the inverting input terminal (-) of the operational amplifier OP1 and a cathode electrode connected to the output terminal of the operational amplifier OP1. The second diode D2 may include an anode electrode connected to the output terminal of the operational amplifier OP1 and a cathode electrode connected to the low-pass filter 116.

[0093] As shown in Table 1 below, when the summed input signal Vin is a positive voltage (or positive polarity voltage) and the output voltage V O1 When the input signal Vin is a negative voltage (or a negative polarity voltage), the first diode D1 can be turned on, and when the input signal Vin is a negative voltage and the output voltage V O1 When the input signal Vin is a negative voltage and the output voltage V O1When the voltage is positive, the second diode D2 can be turned on, and when the input signal Vin is a positive voltage and the output voltage V O1 When it is a negative voltage, the second diode D2 can be turned off.

[0094] When the input signal Vin of the AC waveform is a positive voltage, the rectifier circuit 112 may block the input signal Vin so as not to pass the input signal Vin to the low-pass filter 116, and when the input signal Vin is a negative voltage, the rectifier circuit 112 may supply a signal in which the input signals V1, V2, and V3 are summed as shown in Equation 1 and Table 1 to the low-pass filter 116.

[0095] The low pass filter 116 may be connected to the cathode electrode of the second diode D2. The low pass filter 116 may include a filter resistor R connected to the cathode electrode of the second diode D2. L or inductor L, and connected to the filter resistor R L or a capacitor C of an inductor L, but the embodiments of the present disclosure are not limited thereto. L Or the final output voltage Vout outputted from the node between the inductor L and the capacitor C can be supplied to the charging circuit 113. The inductor L has a high impedance at high frequency signals, so it can be higher than the resistor R L More effectively reduces high-frequency noise and can reduce energy consumption and heat generation compared to resistors.

[0096] Table 1

[0097]

[0098] As a pair Figure 10 The experimental results of the summing and rectifying integrated circuit shown in FIG. 3 show that when the input signals are V1 = 0.75V, V2 = 0.7V, V3 = 0.5V and the amplification ratio is 2, the final output voltage Vout of the summing and rectifying integrated circuit is measured to be a DC voltage of 3.3V.

[0099] Figure 4 The second summing circuit 115 described in the Figure 11 It is implemented by the summing and selection circuit shown in . Figure 11 is a circuit diagram illustrating a summing and selection circuit according to an embodiment of the present disclosure.

[0100] refer to Figure 11 The summing and selecting circuit may include an operational amplifier OP2, a resistor R connected to a non-inverting input terminal (+) of the operational amplifier OP2, and a resistor R connected to a non-inverting input terminal (+) of the operational amplifier OP2. 11 and R 21 , the feedback resistor R connected between the output terminal and the inverting input terminal (-) of the operational amplifier OP2F2 , Resistor R connected between the inverting input terminal (-) of the operational amplifier OP2 and the ground voltage (or reference voltage) 31 , connected to the first input voltage source 51 and the first resistor R 11 The voltage detection circuit 500 is connected between the second input voltage source 52 and the second resistor R 21 The switching element SW therebetween, but the embodiments of the present disclosure are not limited thereto.

[0101] The first input voltage source 51 can output a first voltage Vs. The first input voltage source 51 can be an external power source. The second input voltage source 52 can output a second voltage Vc. The second input voltage source 52 can be a battery of the charging circuit 113 or the voltage regulator circuit 114. The second voltage Vc can be an energy recovery voltage obtained by the vibration generator controlled in the energy harvesting mode.

[0102] The voltage detection circuit 500 detects the voltage applied to the first resistor R in real time. 11 The first voltage Vs is detected by the voltage detection circuit 500 and supplied to the control section 130. The control section 130 may compare the voltage level of the first voltage Vs detected by the voltage detection circuit 500 with a preset reference value, and if the voltage level of the first voltage Vs detected by the voltage detection circuit 500 is higher than or equal to the reference value, control the output voltage in the first voltage output mode. If the voltage level of the first voltage Vs detected by the voltage detection circuit 500 is lower than the reference value, the control section 130 may control the output voltage in the second voltage output mode. The control section 130 may control the switching element SW by using the switch control signal Csw.

[0103] In the first voltage output mode, the switch element SW can be turned off in response to the invalid logic value of the switch control signal Csw. Therefore, in the first voltage output mode, the output voltage Vp can be output as a voltage Vp=[(1+R F2 / R 31 )]*Vs,R 11 =R 21 , which is obtained by increasing the gain or amplification ratio (R F2 / R 31 ) is applied to the first voltage Vs.

[0104] In the second voltage output mode, the switch element SW may be turned on in response to the active logic value of the switch control signal Csw. Therefore, in the second voltage output mode, the output voltage Vp may be output as a voltage Vp=[(1+R F2 / R 31 )]*(Vs+Vc) / 2,R 11 =R 21, which is obtained by adding the second voltage Vc to the first voltage Vs and applying the amplification ratio (R F2 / R 31 The output voltage Vp can be applied to a vibration generator as a driving voltage, or can be used as a driving voltage to drive another electronic device connected to the power supply system.

[0105] Figure 12 is a view illustrating a vibration generator according to an embodiment of the present disclosure. Figure 13 is shown along Figure 12 A cross-sectional view of the cross-sectional structure of the vibration generator taken along line II' in FIG. Figure 14 is shown along Figure 12 A cross-sectional view of the cross-sectional structure of the vibration generator taken along line II-II'.

[0106] refer to Figures 12 to 14 , the vibration generators P11 to PMN may include one or more vibrators 1311 .

[0107] The vibrator 1311 can provide a piezoelectric effect and an inverse piezoelectric effect. The vibrator 1311 can vibrate according to the vibration (or displacement or drive) of the piezoelectric material in response to a vibration signal applied to the piezoelectric material. For example, when vibration occurs due to the piezoelectric effect (or piezoelectric characteristics), the vibrator 1311 can generate electricity. The vibrator 1311 can vibrate in the Z-axis direction in response to an electrical vibration signal based on the inverse piezoelectric effect.

[0108] The vibrator 1311 may be a vibration generating element, a vibration membrane, a vibration generating membrane, an active vibrator, an active vibration generator, an actuator, an exciter, a membrane actuator, a membrane exciter, an ultrasonic actuator, or an active vibration member, but embodiments of the present disclosure are not limited thereto.

[0109] The vibrator 1311 may be a vibration element, a piezoelectric element, a piezoelectric element unit, a piezoelectric element layer, a piezoelectric structure, a piezoelectric vibration layer, or a piezoelectric vibration layer, but embodiments of the present disclosure are not limited thereto.

[0110] The vibrator 1311 may include a vibration layer 1311 a , a first electrode 1311 b , and a second electrode 1311 c .

[0111] The vibration layer 1311a may include a piezoelectric material or an electroactive material having a piezoelectric effect. For example, the vibration layer 1311a may be a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric composite layer, a piezoelectric composite material, or a piezoelectric ceramic composite material, but the embodiments of the present disclosure are not limited thereto.

[0112] The vibration layer 1311a may be formed of a ceramic-based piezoelectric ceramic capable of achieving relatively strong vibration, or may be formed of a piezoelectric ceramic having a perovskite crystal structure. For example, the vibration layer 1311a may include at least one of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTiO3, but the embodiments of the present disclosure are not limited thereto.

[0113] The piezoelectric ceramic may be composed of a single crystal ceramic having a single crystal structure, or may be composed of a ceramic material having a polycrystalline structure or a polycrystalline ceramic. The piezoelectric material of the single crystal ceramic may include α-AlPO4, α-1SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO, but the embodiments of the present disclosure are not limited thereto. The piezoelectric material of the polycrystalline ceramic may include a PZT (lead zirconate titanate)-based material (including lead (Pb), zirconium (Zr), and titanium (Ti)), or a PZNN (lead zirconate titanate nickel)-based material (including lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb)), but the embodiments of the present disclosure are not limited thereto. For example, the vibration layer 1311a may include at least one of CaTiO3, BaTiO3, and SrTiO3 that does not contain lead (Pb), but the embodiments of the present disclosure are not limited thereto.

[0114] The first electrode 1311b may be disposed on a first surface (or upper surface or front surface) 1311s1 of the vibration layer 1311a. The first electrode 1311b may have the same size as or smaller than the vibration layer 1311a, but the embodiments of the present disclosure are not limited thereto.

[0115] The second electrode 1311c may be provided on a second surface (or lower surface or rear surface) 1311s2 that is different from or opposite to the first surface 1311s1 of the vibration layer 1311a. The second electrode 1311c may have the same size as the vibration layer 1311a or may have a smaller size than the vibration layer 1311a, but embodiments of the present disclosure are not limited thereto. For example, the second electrode 1311c may have the same shape as the vibration layer 1311a, but embodiments of the present disclosure are not limited thereto.

[0116] According to an embodiment of the present disclosure, at least one of the first electrode 1311b and the second electrode 1311c may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent or semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the embodiments of the present disclosure are not limited thereto. The opaque conductive material may include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or a glass frit containing silver (Ag), or may be made of an alloy thereof, but the embodiments of the present disclosure are not limited thereto. For example, each of the first electrode 1311b and the second electrode 1311c may include silver (Ag) having a low resistivity to improve the electrical and / or vibration characteristics of the vibration layer 1311a. For example, the carbon may be a carbon material including carbon black, ketjen black, carbon nanotubes, and graphite, but the embodiments of the present disclosure are not limited thereto.

[0117] In a constant temperature atmosphere or an atmosphere where the temperature changes from high temperature to room temperature, the vibration layer 1311a can be polarized (or poled) using a constant voltage applied to the first electrode 1311b and the second electrode 1311c, but the embodiments of the present disclosure are not limited thereto. For example, the polarization direction (or polarization direction) formed in the vibration layer 1311a can be formed or oriented (or arranged) from the first electrode 1311b to the second electrode 1311c, but is not limited thereto. For example, the polarization direction (or polarization direction) formed in the vibration layer 1311a can be formed or oriented (or arranged) from the second electrode 1311c to the first electrode 1311b.

[0118] Due to the inverse piezoelectric effect caused by the driving signal applied from the outside to the first electrode 1311b and the second electrode 1311c, the vibration layer 1311a can vibrate by alternately repeating contraction and / or expansion. For example, the vibration layer 1311a can vibrate in the Z-axis direction (or thickness direction) and the XY plane direction according to the signal applied to the first electrode 1311b and the second electrode 1311c.

[0119] The vibration generators P11 to PMN according to embodiments of the present disclosure may further include a first cover member 1313 and a second cover member 1315. For another example, only one of the first cover member 1313 and the second cover member 1315 may be provided. For example, the cover member may be formed on the first surface of the vibration generators P11 to PMN or the second surface of the vibration generators P11 to PMN.

[0120] The first cover member 1313 may be disposed on the first surface of the vibration generators P11 to PMN, for example, on the first surface of the vibrator 1311, as shown in FIG. Figure 13 As shown. For example, the first cover member 1313 can be formed to cover the first electrode 1311b of the vibration generator P11 to PMN, for example, the first electrode 1311b of the vibrator 1311. For example, the first cover member 1313 can be formed to have a larger size than the vibrator 1311, but embodiments of the present disclosure are not limited thereto. The first cover member 1313 can be formed to protect the first surface of the vibrator 1311 and the first electrode 1311b.

[0121] The second cover member 1315 may be disposed on the second surface of the vibration generators P11 to PMN, for example, on the second surface of the vibrator 1311, as shown in FIG. Figure 13 As shown. For example, the second cover member 1315 can be formed to cover the second electrode 1311c of the vibration generator P11 to PMN, for example, the second electrode 1311c of the vibrator 1311. For example, the second cover member 1315 can be formed to have a larger size than the vibrator 1311, and can be formed to have the same size as the first cover member 1313, but the embodiments of the present disclosure are not limited thereto. The second cover member 1315 can be formed to protect the second surface of the vibrator 1311 and the second electrode 1311c.

[0122] According to an embodiment of the present disclosure, the first cover member 1313 and the second cover member 1315 may include the same or different materials. For example, each of the first cover member 1313 and the second cover member 1315 may be a polyimide film, a polyethylene terephthalate film, a polyethylene naphthalate film, etc., but the embodiment of the present disclosure is not limited thereto.

[0123] The first cover member 1313 may be connected or coupled to the first surface of the vibrator 1311 or the first electrode 1311b via the medium of the first adhesive layer 1317. For example, the first cover member 1313 may be connected or coupled to the first surface of the vibrator 1311 or the first electrode 1311b through a film lamination process using the first adhesive layer 1317 as a medium.

[0124] The second cover member 1315 may be connected or coupled to the second surface of the vibrator 1311 or the second electrode 1311 c via the medium of the second adhesive layer 1319. For example, the second cover member 1315 may be connected or coupled to the second surface of the vibrator 1311 or the second electrode 1311 c through a film lamination process using the second adhesive layer 1319 as a medium.

[0125] According to an embodiment of the present disclosure, each of the first adhesive layer 1317 and the second adhesive layer 1319 may include an adhesive, compressible, and recoverable electrically insulating material. For example, each of the first adhesive layer 1317 and the second adhesive layer 1319 may include epoxy resin, acrylic resin, silicone resin, polyurethane resin, acrylic-based polymer, silicone-based polymer, or polyurethane-based polymer, but the embodiments of the present disclosure are not limited thereto.

[0126] The first adhesive layer 1317 and the second adhesive layer 1319 may be formed between the first cover member 1313 and the second cover member 1315 so as to surround the vibrator 1311. For example, at least one of the first adhesive layer 1317 and the second adhesive layer 1319 may be formed to partially or completely surround the vibrator 1311.

[0127] One of the first cover member 1313 and the second cover member 1315 may be omitted. For example, one of the first cover member 1313 and the second cover member 1315 may be formed to cover or protect at least one of the first surface and the second surface of the vibrator 1311.

[0128] The vibrator 1311 according to an embodiment of the present disclosure may further include a signal supply member 1320 .

[0129] The signal supply member 1320 may be formed to supply a driving signal supplied from the driving circuit to the vibrator 1311. The signal supply member 1320 may be formed to be electrically connected to the first electrode 1311b and the second electrode 1131c of the vibration layer 1311a.

[0130] A portion of the signal supply member 1320 may be accommodated (or inserted) between the first cover member 1313 and the second cover member 1315. An end portion (or terminal portion or one side) of the signal supply member 1320 may be disposed or inserted (or accommodated) between an edge portion of the first cover member 1313 and an edge portion of the second cover member 1315. An edge portion of the first cover member 1313 and an edge portion of the second cover member 1315 may accommodate or cover an end portion (or terminal portion or one side) of the signal supply member 1320 from above and below. Thus, the signal supply member 1320 may be integrated with the vibrator 1311. For example, the signal supply member 1320 may be formed as a single component with the vibrator 1311, thereby providing a uni-materialization effect. For example, the signal supply member 1320 may be composed of a signal cable, a flexible cable, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multi-layer printed circuit, or a flexible multi-layer printed circuit board, but the embodiments of the present disclosure are not limited thereto.

[0131] The signal supply member 1320 according to an embodiment of the present disclosure may include a base member 1321 and a plurality of signal lines 1323a and 1323b. For example, the signal supply member 1320 may include a base member 1321, a first signal line 1323a, and a second signal line 1323b.

[0132] The base member 1321 may include a transparent or opaque plastic material, but the embodiments of the present disclosure are not limited thereto. The base member 1321 may have a constant width along a first direction (X) and may extend along a second direction (Y) intersecting the first direction (X).

[0133] The first signal line 1323a and the second signal line 1323b may be disposed on the first surface of the base member 1321 so as to be parallel to the second direction (Y) and may be spaced apart from each other or electrically separated from each other along the first direction (X). The first signal line 1323a and the second signal line 1323b may be arranged parallel to each other on the first surface of the base member 1321. For example, the first signal line 1323a and the second signal line 1323b may be implemented in a line shape by patterning a metal layer (or conductive layer) formed or deposited on the first surface of the base member 1321, but embodiments of the present disclosure are not limited thereto.

[0134] Ends (or terminal portions or one side) of the first signal line 1323 a and the second signal line 1323 b may be separated from each other to be individually warped or bent.

[0135] The end (or terminal portion or one side) of the first signal line 1323a can be electrically connected to the first electrode 1311b of the vibrator 1311. For example, the end of the first signal line 1323a can be electrically connected to at least a portion of the first electrode 1311b of the vibrator 1311 at one edge portion of the first cover member 1313. For example, the end (or terminal portion or one side) of the first signal line 1323a can be directly electrically connected to at least a portion of the first electrode 1311b of the vibrator 1311. For example, the end (or terminal portion or one side) of the first signal line 1323a can be directly connected to the first electrode 1311b of the vibrator 1311 or directly contact the first electrode 1311b of the vibrator 1311. For example, the end of the first signal line 1323a can be electrically connected to the first electrode 1311b via a conductive double-sided tape. Therefore, the first signal line 1323a can supply the vibration signal supplied from the driving part to the first electrode 1311b of the vibrator 1311.

[0136] The end (or terminal portion or one side) of the second signal line 1323b can be electrically connected to the second electrode 1311c of the vibrator 1311. For example, the end of the second signal line 1323b can be electrically connected to at least a portion of the second electrode 1311c of the vibrator 1311 at one edge portion of the second cover member 1315. For example, the end of the second signal line 1323b can be directly electrically connected to at least a portion of the second electrode 1311c of the vibrator 1311. For example, the end of the second signal line 1323b can be directly connected to the second electrode 1311c of the vibrator 1311 or directly contact the second electrode 1311c of the vibrator 1311. For example, the end of the second signal line 1323b can be electrically connected to the second electrode 1311c via a conductive double-sided tape. Therefore, the second signal line 1323b can supply the vibration signal supplied from the driving part to the second electrode 1311c of the vibrator 1311.

[0137] The signal supply member 1320 according to an embodiment of the present disclosure may further include an insulating layer 1325 .

[0138] An insulating layer 1325 may be provided on the first surface of the base member 1321 so as to respectively cover the first signal line 1323 a and the second signal line 1323 b excluding an end portion (or one side) of the signal supply member 1320 .

[0139] An end portion (or one side) of the signal supply member 1320, including an end portion (or one side) of the base member 1321, and an end portion (or one side) 1325a of the insulating layer 1325 may be inserted (or accommodated) between the first cover member 1313 and the second cover member 1315, and may be fixed between the first cover member 1313 and the second cover member 1315 by the first adhesive layer 1317 and the second adhesive layer 1319. Therefore, the end portion (or one side) of the first signal line 1323a may remain electrically connected to the first electrode 1311b of the vibrator 1311, and the end portion (or one side) of the second signal line 1323b may remain electrically connected to the second electrode 1311c of the vibrator 1311. In addition, since the end (or one side) of the signal supply member 1320 is inserted (or accommodated) and fixed between the vibrator 1311 and the first covering member 1313, poor connection between the vibrator 1311 and the signal supply member 1320 due to movement of the signal supply member 1320 can be prevented.

[0140] In the signal supply member 1320 according to an embodiment of the present disclosure, the end (or one side) of the base member 1321 and the end (or one side) 1325a of the insulating layer 1325 can be removed. For example, the end (or one side) of the first signal line 1323a and the end (or one side) of the second signal line 1323b can both be exposed to the outside without being supported or covered by the end (or one side) 1325a of the base member 1321 and the end (or one side) 1325a of the insulating layer 1325, respectively. For example, the end (or one side) of the first signal line 1323a and the end (or one side) of the second signal line 1323b can protrude (or extend) to a specific length from the end 1321e of the base member 1321 or the end 1325e of the insulating layer 1325. As a result, the ends (or terminal portions or one side) of the first signal line 1323a and the second signal line 1323b can be warped or bent individually or independently.

[0141] An end portion (or one side) of the first signal line 1323a that is not supported by an end portion (or one side) of the base member 1321 or an end portion (or one side) 1325a of the insulating layer 1325 may be directly connected to the first electrode 1311b of the vibrator 1311 or directly contact the first electrode 1311b of the vibrator 1311. An end portion (or one side) of the second signal line 1323b that is not supported by an end portion (or one side) of the base member 1321 or an end portion (or one side) 1325a of the insulating layer 1325 may be directly connected to the second electrode 1311c of the vibrator 1311 or directly contact the second electrode 1311c of the vibrator 1311.

[0142] According to an embodiment of the present disclosure, a portion of the signal supply member 1320 or a portion of the base member 1321 may be disposed or inserted (or accommodated) between the first cover member 1313 and the second cover member 1315, so that the signal supply member 1320 may be integrated with the vibrator 1311. Thus, the vibrator 1311 and the signal supply member 1320 may be formed as a single component, thereby achieving a singularization effect.

[0143] According to an embodiment of the present disclosure, since the first signal line 1323a and the second signal line 1323b of the signal supply member 1320 are integrated with the vibrator 1311, a welding process for electrical connection between the vibrator 1311 and the signal supply member 1320 is not required, and therefore, the structure and manufacturing process of the vibrator 1333 can be simplified, thereby producing the effect of avoiding harmful processes.

[0144] Figure 15 is a view showing a vibration layer according to another embodiment of the present disclosure. For example, Figure 15 Shown is a reference Figures 12 to 14 Another embodiment of the vibration layer is described.

[0145] refer to Figure 13 and Figure 15 According to another embodiment of the present disclosure, the vibration layer 1311a may include a plurality of first portions 1311a1 and a plurality of second portions 1311a2. For example, the plurality of first portions 1311a1 and the plurality of second portions 1311a2 may be alternately and repeatedly arranged along the X-axis direction (or the first direction) or the Y-axis direction (or the second direction).

[0146] Each of the plurality of first portions 1311a1 may include an inorganic material having a piezoelectric effect and an inverse piezoelectric effect. For example, each of the plurality of first portions 1311a1 may include at least one of a piezoelectric inorganic material and a piezoelectric organic material. For example, each of the plurality of first portions 1311a1 may be an inorganic portion, an inorganic material portion, a piezoelectric portion, a piezoelectric material portion, or an electroactive portion, but embodiments of the present disclosure are not limited thereto.

[0147] According to an embodiment of the present disclosure, each of the plurality of first portions 1311a1 may have a width parallel to the second direction (Y) (or the first direction (X)) and may extend along the first direction (X) (or the second direction (Y)). Figures 12 to 14 The described vibration layer 1311 a is substantially the same, and repeated description thereof may be omitted or simplified.

[0148] A plurality of second portions 1311a2 may be disposed between a plurality of first portions 1311a1. For example, each of the plurality of first portions 1311a1 may be disposed between two adjacent second portions 1311a2 in the plurality of second portions 1311a2. Each of the plurality of second portions 1311a2 may have a width parallel to the second direction (Y) (or the first direction (X)) and may extend along the first direction (X) (or the second direction (Y)). The width of the first portion 1311a1 may be the same as or different from the width of the second portion 1311a2. For example, the width of the first portion 1311a1 may be greater than the width of the second portion 1311a2. For example, the first portion 1311a1 and the second portion 1311a2 may include a line shape or a stripe shape having the same or different sizes, but the embodiments of the present disclosure are not limited thereto.

[0149] Each of the plurality of second portions 1311a2 may be formed to fill a gap between two adjacent first portions 1311a1. Each of the plurality of second portions 1311a2 may be formed to fill a gap between two adjacent first portions 1311a1 so as to be connected or bonded to the side surfaces of the adjacent first portions 1311a1. According to an embodiment of the present disclosure, the plurality of first portions 1311a1 and the plurality of second portions 1311a2 may be arranged (or disposed) parallel to each other on the same plane (or the same layer). Thus, the vibration layer 1311a can be extended to a desired size or length by lateral coupling (or connection) between the first portions 1311a1 and the second portions 1311a2.

[0150] According to an embodiment of the present disclosure, each of the plurality of second portions 1311a2 can improve the durability of the first portion 1311a1 by absorbing the impact applied to the first portion 1311a1, and can provide flexibility to the vibration layer 1311a. Each of the plurality of second portions 1311a2 can include an organic material having a flexible property. For example, the plurality of second portions 1311a2 can be at least one of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but the embodiments of the present disclosure are not limited thereto. For example, each of the plurality of second portions 1311a2 can be an organic portion, an organic material portion, an adhesive portion, a stretchable portion, a bendable portion, a damping portion, or a flexible portion, but the embodiments of the present disclosure are not limited thereto.

[0151] The first surface of each of the plurality of first portions 1311a1 and the plurality of second portions 1311a2 may be commonly connected to the first electrode 1311b. The second surface of each of the plurality of first portions 1311a1 and the plurality of second portions 1311a2 may be commonly connected to the second electrode 1311c. For example, one or both of the first electrode 1311b and the second electrode 1311c may be formed as a patterned electrode so as to correspond only to the plurality of first portions 1311a1.

[0152] The vibration layer 1311a according to another embodiment of the present disclosure can have a single thin film shape by arranging (or connecting) multiple first parts 1311a1 and multiple second parts 1311a2 on the same plane. As a result, the vibration generators P11 to PMN according to another embodiment of the present disclosure can vibrate by using the first part 1311a1 of the vibration layer 1311a having vibration characteristics, and can be bent in a curved shape by using the second part 1311a2 having flexibility.

[0153] Figure 16 is a view showing a vibration layer according to another embodiment of the present disclosure. For example, Figure 16 Shown is a reference Figures 12 to 14 Another embodiment of the vibration layer is described.

[0154] refer to Figure 13 and Figure 16 , the vibration layer 1311 a according to another embodiment of the present disclosure may include a plurality of first portions 1311 a 3 and a second portion 1311 a 4 disposed between the plurality of first portions 1311 a 3 .

[0155] The plurality of first portions 1311a3 may be arranged to be spaced apart from each other along the first direction (X) and the second direction (Y). For example, the plurality of first portions 1311a3 may have a hexahedral shape of the same size and may be arranged in a grid shape, but embodiments of the present disclosure are not limited thereto. For example, the plurality of first portions 1311a3 may each have a circular, elliptical, or polygonal plate shape of the same size, but embodiments of the present disclosure are not limited thereto.

[0156] The plurality of first portions 1311a3 are each connected to the reference Figure 15 The first portion 1311a1 described is substantially the same, and its repeated description may be omitted or simplified.

[0157] The second portion 1311a4 may be arranged between the plurality of first portions 1311a3 along the first direction (X) and the second direction (Y). The second portion 1311a4 may be formed to fill a gap between two adjacent first portions 1311a3, or to be adjacent to each of the plurality of first portions 1311a3, or to surround each of the plurality of first portions 1311a3, thereby being connected or coupled to the adjacent first portions 1311a3. Figure 15 The second portion 1311a2 described is substantially the same, and its repeated description may be omitted or simplified.

[0158] The first surface of each of the plurality of first portions 1311a3 and the second portion 1311a4 may be commonly connected to the first electrode 1311b. The second surface of each of the plurality of first portions 1311a3 and the second portion 1311a4 may be commonly connected to the second electrode 1311c. According to another embodiment of the present disclosure, at least one of the first electrode 1311b and the second electrode 1311c may be formed into a shape corresponding only to the patterned electrode of the plurality of first portions 1311a3.

[0159] The vibration layer 1311a according to another embodiment of the present disclosure can have a single thin film shape by arranging (or connecting) a plurality of first portions 1311a3 and second portions 1311a4 on the same plane. Thus, the vibration generators P11 to PMN according to another embodiment of the present disclosure can vibrate by using the first portion 1311a3 of the vibration layer 1311a having vibration characteristics, and can be bent in a curved shape by using the second portion 1311a4 having flexibility.

[0160] Figure 17 is a schematic diagram of a vibration generator according to another embodiment of the present disclosure.

[0161] Reference Figure 17 The vibration generators P11 to PMN according to another embodiment of the present disclosure may include a plurality of vibration generators 1310a and 1310b stacked along the Z-axis direction (or the third direction). Each of the first vibration generator 1310a and the second vibration generator 1310b may include a vibrator 1311.

[0162] The first vibration generator 1310a and the second vibration generator 1310b may have substantially the same size, but the embodiments of the present disclosure are not limited thereto. Therefore, the first vibration generator 1310a and the second vibration generator 1310b may maximize the amplitude displacement of the vibration generator P11 to PMN.

[0163] The vibrator 1311 of each of the first vibration generator 1310a and the second vibration generator 1310b is connected to the reference Figures 12 to 16 The vibrators of the described vibration generators P11 to PMN are the same or substantially the same, and thus the same reference symbols may be assigned thereto, and repeated descriptions may be omitted or simplified.

[0164] The vibration generators P11 to PMN according to another embodiment of the present disclosure may further include an intermediate member 1330 .

[0165] The intermediate member 1330 may be disposed or connected between the first vibration generator 1310a and the second vibration generator 1310b. For example, the intermediate member 1330 may be disposed or connected between the second cover member 1315 of the first vibration generator 1310a and the first cover member 1313 of the second vibration generator 1310b. For example, the intermediate member 1330 may be an adhesive member or a connecting member, but embodiments of the present disclosure are not limited thereto.

[0166] According to an embodiment of the present disclosure, the intermediate member 1330 can be made of a material including an adhesive layer that has excellent adhesion or adhesive strength for both the first vibration generator 1310a and the second vibration generator 1310b. For example, the intermediate member 1330 can include a foam pad, double-sided tape, double-sided foam tape, double-sided pad, double-sided foam pad, or adhesive, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the intermediate member 1330 can include epoxy resin, acrylic resin, silicone resin, or polyurethane, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the intermediate member 1330 can include a polyurethane-based material (or substance) with relatively flexible properties. Therefore, the vibration loss caused by the displacement interference between the first vibration generator 1310a and the second vibration generator 1310b can be minimized, or each of the first vibration generator 1310a and the second vibration generator 1310b can be freely displaced (or vibrated or driven).

[0167] According to another embodiment of the present disclosure, the vibration generators P11 to PMN include a first vibration generator 1310a and a second vibration generator 1310b, which are stacked (or overlapped or superimposed) to vibrate (or shift or drive) in the same direction, so that the displacement amount or amplitude displacement can be maximized or increased. Therefore, the displacement amount (or bending force or driving force) or amplitude displacement of the vibration generators P11 to PMN can be maximized or increased.

[0168] According to one or more embodiments of the present disclosure, an energy recovery circuit and a power supply system including the energy recovery circuit may be described as follows.

[0169] According to one or more embodiments of the present disclosure, the energy recovery circuit may include: a summing circuit configured to amplify or sum the power output from one or more vibration generators in response to the vibration of the panel member; a rectifier circuit configured to rectify the output signal of the summing circuit; and a charging circuit configured to charge using the power output from the rectifier circuit.

[0170] According to one or more embodiments of the present disclosure, the energy recovery circuit may further include a voltage stabilization circuit configured to stabilize the voltage from the charging circuit through a regulator.

[0171] According to one or more embodiments of the present disclosure, the energy recovery circuit may further include a second summing circuit configured to sum the voltage from the charging circuit and an external voltage, or the output voltage of the voltage stabilization circuit and an external voltage. The output voltage of the second summing circuit may be applied to a vibration generator or another electronic device.

[0172] According to one or more embodiments of the present disclosure, the energy recovery circuit may include a summing and rectifying circuit configured to amplify or sum and rectify the power output from a plurality of vibration generators in response to the vibration of the panel member; and a charging circuit configured to charge using the DC voltage output from the summing and rectifying circuit.

[0173] According to one or more embodiments of the present disclosure, the summing and rectifying circuit may include a summing circuit including an operational amplifier into which signals output from a plurality of vibration generators are input; and a rectifying circuit connected between an input terminal and an output terminal of the operational amplifier.

[0174] According to one or more embodiments of the present disclosure, the summing circuit may further include a plurality of resistors connected to the inverting input terminal of the operational amplifier; and a feedback resistor connected between the output terminal and the inverting input terminal of the operational amplifier. A reference voltage or a ground voltage may be applied to the non-inverting input terminal of the operational amplifier.

[0175] According to one or more embodiments of the present disclosure, a rectifier circuit may include a first diode and a second diode, wherein the first diode includes an anode electrode connected to an inverting input terminal of an operational amplifier and a cathode electrode connected to an output terminal of the operational amplifier, and the second diode includes a cathode electrode and an anode electrode connected to the output terminal of the operational amplifier.

[0176] According to one or more embodiments of the present disclosure, the summing and rectifying circuit may further include a low-pass filter connected to the cathode electrode of the second diode.

[0177] According to one or more embodiments of the present disclosure, the low-pass filter may include a filter resistor connected to a cathode electrode of the second diode; and a capacitor connected to the filter resistor.

[0178] According to one or more embodiments of the present disclosure, the low-pass filter may include an inductor connected to a cathode electrode of the second diode; and a capacitor connected to the inductor.

[0179] According to one or more embodiments of the present disclosure, a power supply system may include: a panel member on which a plurality of vibration generators are arranged; a control part configured to control one or more first vibration generators in a vibration mode and one or more second vibration generators in an energy collection mode among the vibration generators arranged on the panel member; a plurality of driving parts configured to vibrate the first vibration generators under the control of the control part and receive power output from the second vibration generators in response to the vibration of the panel member; and an energy recovery circuit configured to charge using the power output from the second vibration generators through the driving parts.

[0180] According to one or more embodiments of the present disclosure, each of the driving parts may include: a vibration driver configured to amplify a vibration signal input from the control part; a first switching element that is turned on under the control of the control part to supply the vibration signal output from the vibration driver to a first vibration generator operating in a vibration mode; an amplifier; and a second switching element that is turned on under the control of the control part to supply power output from a second vibration generator operating in an energy harvesting mode to the amplifier.

[0181] According to one or more embodiments of the present disclosure, the driving parts may be connected to different vibration generators or vibration generator groups, respectively. Each vibration generator group may include a plurality of vibration generators.

[0182] According to one or more embodiments of the present disclosure, the control part may output a switch control signal that individually controls the driving part.

[0183] According to one or more embodiments of the present disclosure, the second vibration generator may output power in response to vibration of the panel member.

[0184] According to one or more embodiments of the present disclosure, an energy recovery circuit may be connected to the plurality of second vibration generators. The energy recovery circuit may include: a summing circuit configured to amplify or sum the power output from the plurality of second vibration generators; a rectifier circuit configured to rectify the output signal of the summing circuit; and a charging circuit configured to charge using the power output from the rectifier circuit.

[0185] According to one or more embodiments of the present disclosure, the energy recovery circuit may further include a voltage stabilization circuit that stabilizes the voltage from the charging circuit through a regulator.

[0186] According to one or more embodiments of the present disclosure, the energy recovery circuit may further include a second summing circuit configured to sum the voltage from the charging circuit and an external voltage, or the output voltage of the voltage stabilization circuit and an external voltage. The output voltage of the second summing circuit may be applied to a vibration generator or another electronic device.

[0187] According to one or more embodiments of the present disclosure, the second summing circuit may include an operational amplifier; a first resistor connected to a non-inverting input terminal of the operational amplifier; a second resistor connected to the non-inverting input terminal of the operational amplifier; a feedback resistor connected between the output terminal and the inverting input terminal of the operational amplifier; a third resistor connected between the inverting input terminal of the operational amplifier and a ground voltage; a voltage detection circuit connected between a first voltage source outputting a first voltage and the first resistor; and a switching element connected between a second voltage source outputting a second voltage and the second resistor. The second voltage source may include a battery of a charging circuit or a voltage stabilizing circuit.

[0188] According to one or more embodiments of the present disclosure, the control part can turn off the switching element when the first voltage output from the voltage detection circuit is greater than or equal to a preset reference value, and can turn on the switching element when the first voltage output from the voltage detection circuit is less than the reference value.

[0189] According to one or more embodiments of the present disclosure, a vibration generator may include at least one vibrator. The at least one vibrator may include: a vibration layer including a piezoelectric material; a first electrode on a first surface of the vibration layer; a second electrode on a second surface different from the first surface of the vibration layer; and a cover member on the first surface or the second surface of the at least one vibrator.

[0190] According to one or more embodiments of the present disclosure, the energy recovery circuit and the power supply system can be applied to mobile devices, video phones, smart watches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved devices, sliding devices, variable devices, electronic notepads, electronic books, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop PCs, laptop PCs, netbook computers, workstations, navigation, vehicle navigation, vehicle display devices, vehicle equipment, theater equipment, theater display devices, televisions, wallpaper equipment, signage equipment, gaming equipment, laptop computers, monitors, cameras, camcorders, and home appliances, etc. Additionally, the energy recovery circuit and the power supply system according to one or more embodiments of the present disclosure can be applied to organic light emitting lighting devices or inorganic light emitting lighting devices.

[0191] The objects to be achieved by the present disclosure, means for achieving the above objects, and the effects of the present disclosure described above do not specify essential features of the claims, and thus the scope of the claims is not limited to the disclosure of the present disclosure.

[0192] Although the embodiments of the present disclosure have been described in more detail with reference to the accompanying drawings, the present disclosure is not limited thereto and can be embodied in many different forms without departing from the technical concept of the present disclosure. Therefore, the embodiments disclosed in the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above embodiments are illustrative in all aspects and do not limit the present disclosure.

Claims

1. An energy recovery circuit, comprising: a summing circuit configured to amplify or sum power output from the one or more vibration generators in response to vibration of the panel member; a rectifier circuit configured to rectify an output signal of the summing circuit; as well as A charging circuit is configured to perform charging using the power output from the rectifier circuit.

2. The energy recovery circuit according to claim 1, further comprising: The voltage stabilization circuit is configured to stabilize the voltage from the charging circuit through a regulator.

3. The energy recovery circuit according to claim 1 or 2, further comprising: a second summing circuit configured to sum the voltage from the charging circuit and an external voltage or the output voltage of the voltage stabilizing circuit and the external voltage; The output voltage of the second summing circuit is applied to the vibration generator or another electronic device.

4. An energy recovery circuit comprising: a summing and rectifying circuit configured to amplify or sum and rectify power output from the plurality of vibration generators in response to vibration of the panel member; as well as A charging circuit is configured to perform charging using the DC voltage output from the summing and rectifying circuit.

5. The energy recovery circuit according to claim 4, wherein: The summing and rectifying circuit comprises: a summing circuit including an operational amplifier into which signals output from the plurality of vibration generators are input; and A rectifier circuit is connected between the input terminal and the output terminal of the operational amplifier.

6. The energy recovery circuit according to claim 5, wherein: The summing circuit further includes: a plurality of resistors connected to the inverting input terminal of the operational amplifier; and a feedback resistor connected between the output terminal and the inverting input terminal of the operational amplifier, and Here, a reference voltage or a ground voltage is applied to the non-inverting input terminal of the operational amplifier.

7. The energy recovery circuit according to claim 6, wherein: The rectifier circuit comprises: a first diode including an anode electrode connected to the inverting input terminal of the operational amplifier and a cathode electrode connected to the output terminal of the operational amplifier; and A second diode includes a cathode electrode and an anode electrode connected to the output terminal of the operational amplifier.

8. The energy recovery circuit according to claim 7, wherein: The summing and rectifying circuit further comprises: A low-pass filter is connected to the cathode electrode of the second diode.

9. The energy recovery circuit according to claim 8, wherein: The low-pass filter comprises: a filter resistor connected to the cathode electrode of the second diode; and capacitor, which is connected to the filter resistor.

10. The energy recovery circuit according to claim 8, wherein: The low-pass filter comprises: an inductor connected to the cathode electrode of the second diode; and capacitor, which is connected to the inductor.

11. A power supply system comprising: a panel member on which a plurality of vibration generators are arranged; a control portion configured to control one or more first vibration generators in a vibration mode and one or more second vibration generators in an energy harvesting mode among the vibration generators arranged on the panel member; a plurality of driving portions configured to vibrate the first vibration generator under the control of the control portion and receive power output from the second vibration generator in response to vibration of the panel member; as well as An energy recovery circuit is configured to be charged by the power output from the second vibration generator through the driving portion.

12. The power supply system according to claim 11, wherein: Each of the drive sections comprises: a vibration driver configured to amplify a vibration signal input from the control portion; a first switching element that is turned on under the control of the control portion to supply the vibration signal output from the vibration driver to the first vibration generator operating in the vibration mode; amplifiers; and a second switching element that is turned on under the control of the control portion to supply power output from the second vibration generator operating in the energy harvesting mode to the amplifier.

13. The power supply system according to claim 12, wherein: The driving parts are respectively connected to different vibration generators or groups of vibration generators; and Each vibration generator group includes a plurality of vibration generators.

14. The power supply system according to claim 13, wherein: The control section is configured to output a switch control signal that individually controls the driving section.

15. The power supply system according to claim 11, wherein: The second vibration generator outputs the electric power in response to vibration of the panel member.

16. The power supply system according to claim 15, wherein: The energy recovery circuit is connected to a plurality of second vibration generators; and The energy recovery circuit comprises: a summing circuit configured to amplify or sum the power output from the plurality of second vibration generators; a rectifier circuit configured to rectify an output signal of the summing circuit; and A charging circuit is configured to perform charging using the power output from the rectifier circuit.

17. The power supply system according to claim 16, wherein: The energy recovery circuit further includes: The voltage stabilizing circuit stabilizes the voltage from the charging circuit through a regulator.

18. The power supply system according to claim 16 or 17, wherein: The energy recovery circuit further includes: a second summing circuit configured to sum the voltage from the charging circuit and an external voltage or the output voltage of the voltage stabilizing circuit and the external voltage, and The output voltage of the second summing circuit is applied to the vibration generator or another electronic device.

19. The power supply system according to claim 18, wherein: The second summing circuit includes: Operational amplifiers; a first resistor connected to a non-inverting input terminal of the operational amplifier; a second resistor connected to the non-inverting input terminal of the operational amplifier; a feedback resistor connected between the output terminal and the inverting input terminal of the operational amplifier; a third resistor connected between the inverting input terminal of the operational amplifier and a ground voltage; a voltage detection circuit connected between a first voltage source outputting a first voltage and the first resistor; and a switching element connected between a second voltage source outputting a second voltage and the second resistor, and Wherein, the second voltage source includes the battery of the charging circuit or the voltage stabilizing circuit.

20. The power supply system according to claim 19, wherein: The control section is configured to: When the first voltage output from the voltage detection circuit is greater than or equal to a preset reference value, turning off the switching element; as well as When the first voltage output from the voltage detection circuit is smaller than the reference value, the switching element is turned on.

21. The power supply system according to claim 18, wherein: The vibration generator includes at least one vibrator; and The at least one vibrator comprises: a vibration layer comprising a piezoelectric material; a first electrode on the first surface of the vibration layer; a second electrode on a second surface different from the first surface of the vibration layer; and A covering member is on the first surface or the second surface of the at least one vibrator.

22. The power supply system according to claim 21, wherein: The vibration layer includes a plurality of first portions having vibration characteristics and a plurality of second portions having flexibility, and wherein each of the plurality of first portions is disposed between two adjacent second portions.

23. The power supply system according to claim 21, wherein: The vibration layer includes a plurality of first portions having vibration characteristics and a second portion having flexibility, and wherein the second portion is provided between the plurality of first portions.

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