阅读说明：本技术 电子装置及其电能转换方法 (Electronic device and electric energy conversion method thereof ) 是由 刘瑞达 王俊杰 李志翔 彭国良 于 2019-08-26 设计创作，主要内容包括：提供一种电子装置及一种电能转换方法,其中电子装置包括至少一动件、一换能系统、一充放电系统以及一供电系统。换能系统包括至少一压电薄膜以及一储存单元,至少一压电薄膜配置在至少一动件上,且储存单元电性耦接至少一压电薄膜。充放电系统电性耦接至少一动件以及换能系统。供电系统电性耦接至少一动件、换能系统以及充放电系统以提供主要电能。其中,至少一动件开始运作,至少一动件带动至少一压电薄膜产生弹性变形并生成辅助电荷,辅助电荷用于传输至储存单元以进行充放电。电子装置及电能转换方法可达到省电目的,也可借以判定动件是否异常。(An electronic device and an electric energy conversion method are provided, wherein the electronic device comprises at least one moving part, an energy conversion system, a charging and discharging system and a power supply system. The energy conversion system comprises at least one piezoelectric film and a storage unit, wherein the at least one piezoelectric film is arranged on the at least one movable piece, and the storage unit is electrically coupled with the at least one piezoelectric film. The charging and discharging system is electrically coupled with the at least one moving part and the energy conversion system. The power supply system is electrically coupled with the at least one moving part, the energy conversion system and the charging and discharging system to provide main electric energy. The at least one movable part starts to operate, the at least one movable part drives the at least one piezoelectric film to generate elastic deformation and generate auxiliary charges, and the auxiliary charges are transmitted to the storage unit for charging and discharging. The electronic device and the electric energy conversion method can achieve the aim of saving electricity and can also be used for judging whether the moving part is abnormal or not.)

1. An electronic device, comprising at least one moving element, a transduction system, a charging/discharging system and a power supply system, wherein:

the energy conversion system comprises at least one piezoelectric film and a storage unit, wherein the piezoelectric film is arranged on the at least one movable piece, and the storage unit is electrically coupled with the at least one piezoelectric film;

the charging and discharging system is electrically coupled with the at least one moving piece and the energy conversion system; and

the power supply system is electrically coupled with the at least one moving piece, the energy conversion system and the charging and discharging system to provide main electric energy;

the at least one movable piece starts to operate, the at least one movable piece drives the at least one piezoelectric film to generate elastic deformation and generate auxiliary charges, and the auxiliary charges are transmitted to the storage unit to be charged and discharged.

2. The electronic device according to claim 1, wherein the transducer system comprises a detecting unit and a determining unit, the detecting unit is electrically coupled to the at least one piezoelectric film and the determining unit, the detecting unit measures an output voltage of the at least one piezoelectric film when the piezoelectric film is elastically deformed, and the determining unit determines whether the output voltage is zero according to a value returned by the detecting unit, so as to determine whether the at least one moving member is abnormal.

3. The electronic device according to claim 2, wherein when the output voltage is kept constant, the rotational frequency of the at least one moving member is determined to be normal, when the output voltage varies, the rotational frequency of the fan or the color wheel is determined to be abnormal, and after the rotational frequency of the fan or the color wheel is determined to be abnormal, the transducing system transmits an abnormal signal back.

4. The electronic device according to claim 1, wherein the transducer system comprises a detection unit and a determination unit, the detection unit is electrically coupled to the at least one piezoelectric film and the determination unit, the detection unit measures a storage voltage of the storage unit, and the determination unit determines whether the storage voltage is increased to determine whether the at least one moving object is abnormal.

5. The electronic device according to claim 1, wherein the transduction system includes a detection unit and a determination unit, the detection unit is electrically coupled to the at least one piezoelectric film and the determination unit, the determination unit determines whether the storage voltage of the storage unit reaches a rated value, the storage unit is charged when the storage voltage is less than the rated value, the auxiliary charge is accumulated in the storage unit, the storage unit is discharged when the storage voltage reaches the rated value, the auxiliary charge is transferred to the charge and discharge system, and the charge and discharge system is configured to transfer the auxiliary charge to the at least one movable member.

6. The electronic device according to claim 1, wherein the at least one movable member comprises a fan, and one end of the at least one piezoelectric film is disposed on an axis of the fan and pivots along the axial direction to oscillate the at least one piezoelectric film.

7. The electronic device according to claim 1, wherein the at least one moving element comprises a color wheel, and one end of the at least one piezoelectric film is disposed on a rotating shaft of the color wheel and pivots along an axial direction to oscillate the at least one piezoelectric film.

8. The electronic device according to claim 1, wherein the at least one movable member comprises a speaker, and the at least one piezoelectric film is disposed on a magnetic yoke of the speaker and receives sound waves from the speaker to vibrate the at least one piezoelectric film.

9. The electronic device according to claim 1, wherein the power supply system includes a power supply and a conversion unit, the power supply is configured to provide the alternating current and transmit the alternating current to the conversion unit, and the conversion unit converts the alternating current into a direct current and supplies the direct current to the at least one movable member, the energy conversion system, and the charging and discharging system.

10. An electric energy conversion method is suitable for an electronic device, the electronic device comprises at least a movable piece, a transduction system, a charging and discharging system and a power supply system, wherein the transduction system comprises at least a piezoelectric film and a storage unit, the piezoelectric film is configured on the movable piece, and the electric energy conversion method is characterized in that:

the power supply system provides main electric energy for the at least one movable piece, the energy conversion system and the charging and discharging system;

the at least one movable piece starts to operate;

the at least one movable piece drives the at least one piezoelectric film to generate elastic deformation and generate auxiliary charges; and

the storage unit receives the auxiliary charge transmission to perform charging and discharging.

11. The method according to claim 10, wherein the transduction system measures an output voltage of the at least one piezoelectric film during elastic deformation, and the determination unit determines whether the output voltage is zero according to the value returned by the detection unit, so as to determine whether the at least one moving member is abnormal.

12. The method according to claim 11, wherein the rotating frequency of the fan or the color wheel is determined to be normal when the output voltage is kept constant, the rotating frequency of the fan or the color wheel is determined to be abnormal when the output voltage fluctuates, and the energy conversion system returns an abnormal signal after the rotating frequency of the fan or the color wheel is determined to be abnormal.

13. The electrical energy conversion method according to claim 10, wherein the energy conversion system measures a storage voltage of the storage unit, and determines whether the storage voltage of the storage unit reaches a rated value by the determination unit.

14. The electrical energy conversion method of claim 13, wherein the charging is performed when the storage voltage of the storage unit is less than the rated value, the auxiliary charge is accumulated in the storage unit, the discharging is performed when the storage voltage of the storage unit reaches the rated value, the auxiliary charge is transmitted to the charging and discharging system, and the charging and discharging system is configured to transmit the auxiliary charge to the at least one movable member.

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electronic device, and more particularly, to an electronic device capable of converting mechanical energy into electrical energy.

[ background of the invention ]

The piezoelectric effect is a phenomenon in which mechanical energy and electrical energy are interchanged. There are two types of piezoelectric effects, namely, a positive piezoelectric effect, in which an auxiliary charge is generated by deformation of a piezoelectric material. In short, the inverse piezoelectric effect is a process of converting electric energy into mechanical energy in general. Piezoelectric materials are currently of great use in loudspeakers, radios, microbalances and optical devices.

However, the conventional piezoelectric materials are rarely applied to electronic products such as projectors, computers, and the like, or household electrical appliances such as air conditioners, refrigerators, and the like, and therefore, the conventional electronic devices cannot effectively utilize mechanical energy generated during the operation of the products.

[ summary of the invention ]

The invention provides an electronic device and an electric energy conversion method, which can convert mechanical energy generated by a movable piece during operation into electric energy through an energy conversion system so as to supply part of electric energy required by the operation of the electronic device.

The electronic device comprises at least one moving piece, an energy conversion system, a charging and discharging system and a power supply system. The energy conversion system comprises at least one piezoelectric film and a storage unit, wherein the at least one piezoelectric film is arranged on the at least one movable piece, and the storage unit is electrically coupled with the at least one piezoelectric film. The charging and discharging system is electrically coupled with the at least one moving part and the energy conversion system. The power supply system is electrically coupled with the at least one moving part, the energy conversion system and the charging and discharging system to provide main electric energy. The at least one movable part starts to operate, the at least one movable part drives the at least one piezoelectric film to generate elastic deformation and generate auxiliary charges, and the auxiliary charges are transmitted to the storage unit for charging and discharging.

The invention relates to an electric energy conversion method, which is suitable for an electronic device, wherein the electronic device comprises at least one moving piece, an energy conversion system, a charging and discharging system and a power supply system, wherein the energy conversion system comprises at least one piezoelectric film and a storage unit, and the piezoelectric film is configured on the at least one moving piece. Wherein: the power supply system provides main electric energy for at least one moving part, the energy conversion system and the charging and discharging system; at least one moving part starts to operate; the at least one moving piece drives the at least one piezoelectric film to generate elastic deformation and generate auxiliary charges; and the storage unit receives the auxiliary charge transmission to carry out charging and discharging.

In view of the above, the electronic device of the present invention arranges the piezoelectric film of the transduction system on the movable element capable of generating mechanical energy, when the movable element starts to operate, the piezoelectric film generates elastic deformation to generate auxiliary charges and transmit the auxiliary charges to the storage unit, which can convert the mechanical energy into electrical energy, the auxiliary charges in the storage unit can be allocated by the charging and discharging system, and can be stored as standby electrical energy, and also can be output to the movable element or other electronic components in the electronic device to supply part of electrical energy required by operation, so as to achieve the purpose of saving power. On the other hand, the energy conversion system can further detect the storage voltage of the storage unit, and whether the movable piece is abnormal or not can be judged by detecting the voltage change.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

Fig. 1A is a block diagram of an electronic device according to an embodiment of the invention.

Fig. 1B is a block diagram of an electronic device according to another embodiment of the invention.

Fig. 2 is a block diagram of an electronic device used as a projector according to another embodiment of the invention.

Fig. 3A to 3C are schematic plan views of piezoelectric films respectively disposed on the fan, the color wheel and the speaker.

FIG. 4 is a block diagram of a power conversion process of the electronic device of FIG. 1A.

[ notation ] to show

100: electronic device

110: movable part

110 a: fan with cooling device

110 b: color wheel

111 b: variable speed motor

112 b: disc with a circular groove

113 b: mechanism fixing column

110 c: horn type loudspeaker

120: transduction system

121: piezoelectric film

122: storage unit

123: detection unit

124: determination unit

130: charging and discharging system

140: power supply system

141: power supply

142: conversion unit

150: battery with a battery cell

210: light source module

220: light valve module

230: lens module

R: rotating shaft

V: acoustic waves

W: wind power

AD: axial direction

L1: illuminating light beam

L2: image light beam

IM: and (5) imaging.

[ detailed description ] embodiments

Fig. 1A is a block diagram of an electronic device 100 according to an embodiment of the invention. FIG. 4 is a block diagram of a power conversion process of the electronic device of FIG. 1A.

Referring to fig. 1A, an electronic device 100 of the present invention includes at least one movable element 110, a transducer system 120, a charging/discharging system 130, and a power supply system 140. The electronic device 100 is, for example, an electronic product such as a projector, a computer, or a household appliance such as a refrigerator, a freezer, etc., and has a feature that the above-mentioned products generate mechanical energy such as vibration, rotation, or shaking during operation.

The at least one movable member 110 includes, for example, a fan, a color wheel, a speaker, or other components that generate vibration. The transducer system 120 includes at least one piezoelectric film 121 and a storage unit 122, wherein the at least one piezoelectric film 121 is disposed on the at least one movable element 110, and the storage unit 122 is electrically coupled to the at least one piezoelectric film 121. In detail, referring to fig. 1A and fig. 4, when the electronic device 100 is started, the following process is performed. In step S401, the at least one movable element 110 starts to operate. In step S402, the at least one moving element drives the at least one piezoelectric film 121 to generate elastic deformation and generate an auxiliary charge. The auxiliary charge is transferred to the storage unit 122 for charging and discharging, wherein the storage unit 122 is, for example, a capacitor. In step S403, the storage unit 122 receives the auxiliary charge transfer for charging and discharging.

The charging and discharging system 130 is electrically coupled to the at least one movable element 110 and the transducing system 120. The charging/discharging system 130 is used for managing the power of the storage unit 122, that is, the auxiliary charges generated by the piezoelectric film 121, for example, transmitting the power of the storage unit 122 to at least one movable element 110 or other components to provide part of the power.

The power supply system 140 is electrically coupled to the at least one movable element 110, the transducer system 120 and the charging/discharging system 130 to provide a main power. In detail, the power supply system 140 includes a power supply 141 and a conversion unit 142, and the power supply 141 is, for example, used for supplying high-voltage alternating current and transmitting the high-voltage alternating current to the conversion unit 142. The converting unit 142, such as an alternating current/direct current converter (AC/DC converter), is configured to convert an alternating current into a direct current and transmit the direct current to the at least one movable member 110, the transducing system 120 and the charging/discharging system 130, so as to supply a basic electric energy required by the operations of the at least one movable member 110, the transducing system 120 and the charging/discharging system 130.

Specifically, when the at least one movable element 110 starts to operate and generates mechanical energy, the at least one movable element 110 drives the at least one piezoelectric film 121 to generate elastic deformation to generate an auxiliary charge, and the auxiliary charge is suitable for being transmitted to the storage unit 122 for charging and discharging.

Referring to fig. 1A, the transducer system 120 further includes a detecting unit 123 and a determining unit 124. The detecting unit 123 is electrically coupled to the at least one piezoelectric film 121 and the determining unit 124, and the determining unit 124 is electrically coupled to the storing unit 122. The detecting unit 123 is configured to detect an operation condition of the at least one movable element 110, and the determining unit 124 is configured to receive the electrical signals from the storing unit 122 and the detecting unit 123 and make a logic determination, so as to transmit a determination result back to the electronic device 100 to execute a corresponding control instruction.

In one embodiment, the detecting unit 123 is used for measuring an output voltage of the at least one piezoelectric film 121 during the elastic deformation, and the determining unit 124 determines whether the output voltage is zero according to a value returned by the detecting unit 123, so as to determine whether the at least one movable member 110 is abnormal. When the output voltage is not zero, it means that the at least one piezoelectric film 121 is still continuously deformed to generate the auxiliary charge, which indicates that the at least one movable element 110 is still in operation. When the output voltage is zero, it means that the at least one piezoelectric film 121 does not generate the auxiliary charge and does not deform, which indicates that the at least one movable element 110 is abnormal and does not operate.

In another embodiment, the detecting unit 123 is used for measuring the storage voltage of the storage unit 122, and the determining unit 124 determines whether the storage voltage is increased according to the value returned by the detecting unit 123, so as to determine whether the at least one movable element 110 is abnormal. When the storage voltage rises, the at least one piezoelectric film 121 is still deformed to input the auxiliary charge into the storage unit 122, which indicates that the at least one movable element 110 is still in operation. When the storage voltage does not continuously rise, it means that the at least one piezoelectric film 121 does not generate the auxiliary charge, which indicates that the at least one movable element 110 is abnormal and does not operate.

Further, the transducer system 120 determines whether the storage voltage of the storage unit 122 reaches a rated value through the determination unit 124. When the storage voltage of the storage unit 122 is less than the rated value, the storage unit 122 is charged, and the auxiliary charge is accumulated in the storage unit 122. When the storage voltage of the storage unit 122 reaches a rated value, the auxiliary charge is discharged and transmitted to the charge-discharge system 130, and the charge-discharge system 130 is used for transmitting the auxiliary charge to at least one movable element 110 or other components.

Fig. 1B is a block diagram of an electronic device 100 according to another embodiment of the invention. Referring to fig. 1B, the electronic device 100 further includes a battery 150 electrically coupled to the charging/discharging system 130, and when the power supply system 140 is not operating, the battery provides standby power to the at least one movable element 110, the transduction system 120 and the charging/discharging system 130. Further, the charge/discharge system 130 is used for transferring the auxiliary charge generated by the at least one piezoelectric film 121 to the battery 150 for energy storage, or to the at least one movable element 110 or other components for partial power supply.

Fig. 2 is a block diagram of an electronic device 100A used as a projector according to another embodiment of the invention. Referring to fig. 2, the electronic device 100A of the present embodiment is a projector, which is a projection apparatus for generating an image frame, and can project the image frame onto a screen or a wall to form an image IM, and is mainly applied to movie projection and conference presentation.

The projector at least includes a light source module (light source module)210, a light valve module (light valve)220 and a lens module (projection lens module)230, wherein the light source module 210 is configured to generate an illumination beam L1, the light valve module 220 is disposed on a transmission path of the illumination beam L1 and is configured to convert the illumination beam L1 into an image beam L2, and the lens module 230 is disposed on the transmission path of the image beam L2 and is configured to project the image beam L2 into an image IM. The light source module 210 is disposed in the housing of the projector, and the light source module 210 includes, for example, a high-brightness halogen bulb to generate the illumination light beam L1. The light source module 210 may include a plurality of visible light emitting elements, a plurality of non-visible light emitting elements, or a combination thereof. The visible light emitting element may be a Light Emitting Diode (LED) or a Laser Diode (LD), but is not limited thereto. The visible light emitting device may include a blue light emitting device, and the non-visible light emitting device may include a uv light emitting diode, but is not limited thereto.

In addition, the projector has a plurality of moving elements 110, the moving elements 110 are a fan 110a, a color wheel 110b and a speaker 110c, respectively, and the fan 110a is used for guiding external cold air into the projector or guiding internal hot air out of the projector, so as to achieve the effects of heat dissipation and cooling. The color wheel 110b is disposed on the transmission path of the illumination beam L1 for converting the color of the beam or filtering out the color of part of the beam by a filter. The speaker 110c is used to play various kinds of warning sounds or sound effects of the projector.

In detail, the illumination light beam L1 generated by the light source module 210 passes through the color wheel 110b, and then passes through the light valve module 220 to be converted into an image light beam L2 to be transmitted to the lens module 230, the lens module 230 is disposed on the transmission path of the image light beam L2, and the image light beam L2 passes through the lens module 230 to be projected onto a screen or a wall surface to form an image IM.

The light valve module 220 may include, but is not limited to, a Digital Micro-mirror Device (DMD), a Liquid Crystal On Silicon (LCOS), or a Liquid Crystal Display Panel (LCD Panel). However, in other embodiments, the light valve module 220 may be a transmissive liquid crystal panel or other spatial light modulator. In the present embodiment, the light valve module 220 may have one or more light valves, and the detailed steps and embodiments thereof corresponding to different numbers of light valves can be sufficiently taught, suggested and described by the common general knowledge in the art, and thus will not be described again. The projection lens module 230 is, for example, a combination including one or more optical lenses having optical power, for example, a non-planar lens such as a biconcave lens, a biconvex lens, a meniscus lens, a convex-concave lens, a plano-convex lens, a plano-concave lens, or various combinations thereof. The present invention is not limited to the type and kind of the projection lens module 230.

Furthermore, the power supply system 140 supplies the main power to start the projector to operate, and the piezoelectric films 121 of the transduction system 120 are respectively disposed on the fan 110a, the color wheel 110b and the speaker 110c, and driven by the fan 110a, the color wheel 110b and the speaker 110c, the piezoelectric films 121 are configured to swing or vibrate to generate the auxiliary charges, and the auxiliary charges are allocated by the charging and discharging system 130 and then transmitted to the moving elements 110 (the fan 110a, the color wheel 110b and the speaker 110c) or other components to supply part of the power.

Fig. 3A to 3C are schematic plan views of the piezoelectric film 121 disposed on the fan 110a, the color wheel 110b and the speaker 110C, respectively. The details of the piezoelectric films 121 of the transduction system 120 respectively disposed on the fan 110a, the color wheel 110b and the speaker 110c are described below.

Referring to fig. 2 and fig. 3A, the at least one movable element 110 includes a fan 110a, one end of the at least one piezoelectric film 121 is disposed on an axis of the fan 110a and pivots along an axial direction AD, so that the at least one piezoelectric film 121 is pushed by air, and the wind W of the fan 110a is parallel to the axial direction AD and acts on the at least one piezoelectric film 121, so that the at least one piezoelectric film 121 swings relative to a side surface of the fan 110 a.

Referring to fig. 2 and fig. 3B, the at least one movable element 110 includes a color wheel 110B, and one end of the at least one piezoelectric film 121 is disposed on a rotation axis R of the color wheel 110B and pivots along an axial direction AD, so that the at least one piezoelectric film 121 swings relative to a side surface of the color wheel 110B. Specifically, the color wheel 110b includes a variable speed motor 111b, a disk 112b and a mechanism fixing post 113b, and the rotation speed of the variable speed motor 111b varies from about 300 to about 5000 revolutions Per Minute (rpm). The disk 112b is disposed on the rotation shaft R of the variable speed motor 111b, and the disk 112b is, for example, a combination of filters of plural colors for separating the color of the illumination light beam L1 passing therethrough, or the disk 112b is, for example, a light wavelength conversion device for converting the illumination light beam L1 passing therethrough into a converted light beam. The color wheel 110b is fixed to the projector through a mechanism fixing post 113 b. Thus, the disk 112b transmits different monochromatic lights to a predetermined light path by rotating at a high speed to be converted into the image light beam L2.

The detecting unit 123 of the transducing system 120 is electrically coupled to the at least one piezoelectric film 121, and is configured to measure an output voltage of the at least one piezoelectric film 121 during the oscillation, and convert the output voltage into a corresponding rotation speed to determine whether the rotation frequency of the fan 110a or the color wheel 110b is abnormal. For example, when the rotation speed of the fan 110a or the color wheel 110b is 500rpm, the output voltage generated by the oscillation deformation of the at least one piezoelectric film 121 is 0.3V. When the output voltage 0.3V is kept constant, i.e. the rotation speed 500rpm of the fan 110a or the color wheel 110b is kept constant, it can be determined that the rotation frequency is normal. When the output voltage varies to be greater than or less than 0.3V, which means that the rotation speed of the fan 110a or the color wheel 110b is greater than or less than 500rpm, it can be determined that the rotation frequency of the fan 110a or the color wheel 110b is abnormal. After the rotation frequency of the fan 110a or the color wheel 110b is determined to be abnormal, the transducer system 120 transmits an abnormal signal back.

Referring to fig. 2 and fig. 3C, the at least one movable element includes a speaker 110C, and the at least one piezoelectric film 121 is disposed on the anti-magnetic yoke 111C of the speaker 110C and receives the sound wave V of the speaker 110C, so that the at least one piezoelectric film 121 vibrates. The detecting unit 123 of the transducing system 120 is electrically coupled to the at least one piezoelectric film 121 for measuring an output voltage of the at least one piezoelectric film 121 when vibrating, for example, an oscillating frequency of the sound wave V is irregular, so that when the sound wave V is transmitted to the at least one piezoelectric film 121, different degrees of vibration are caused. At least one piezoelectric film 121 generates output voltages with different magnitudes according to the corresponding vibration level. Therefore, the detecting unit 123 only needs to measure whether the output voltage is generated, and when the output voltage is not zero, it determines that the horn 110c is normal, and when the output voltage is continuously zero, it determines that the horn 110c is abnormal.

In summary, in the electronic device of the present invention, the piezoelectric film of the transduction system is disposed on the movable element capable of generating mechanical energy, and when the movable element starts to operate, the piezoelectric film elastically deforms to generate an auxiliary charge and transmit the auxiliary charge to the storage unit, so as to achieve the purpose of converting the mechanical energy into electrical energy. In addition, the auxiliary charge in the storage unit can be allocated by a charging and discharging system, can be stored as standby electric energy, and can also be output to a movable part or other electronic components in the electronic device to supply part of electric energy required by operation.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.