TWI403105B - Image/video signal and electrical energy wireless transmitting apparatus and method thereof - Google Patents

Description

Wireless image and power transmission device and method

The present invention relates to a wireless image and power transmission device and method, and more particularly to a wireless image and power transmission device and method for use between a portable electronic product and a display device.

The existing electronic products are all aimed at pursuing miniaturization and portability. However, the smaller the portable electronic product, the battery capacity is also limited, and the battery capacity is also small, so the power supply duration of the electronic product is short. In addition, existing electronic products tend to be more multifunctional in entertainment. For example, electronic products can be used to capture video and images. Video or images can also be stored in these electronic products. These videos can be directly viewed on the screen of electronic products. Image, however, due to the size of the electronic product, the size of the screen is inevitably limited, so the display and viewing effect of the video or image is not satisfactory. If you want to watch videos or images on a larger screen, the existing method is to connect electronic products and display devices with data cables, and the image data is transmitted through data lines. However, when using data cables to connect electronic products and display devices, electronic products must be placed. In the vicinity of the display device, its use is limited. In addition, the existing electronic products generally transmit electricity through cables to charge. The frequent insertion and removal of data lines and cables in electronic products and display devices will undoubtedly affect the service life of electronic products and display devices, and at the same time, the use of electronic products will be affected. limit.

In view of this, it is necessary to provide a wireless transmission between the electronic product and the display device. Wireless image and power transmission devices such as data and electrical energy.

It is also necessary to provide a wireless image and power transmission method using the wireless image and power transmission device.

A wireless image and power transmission device includes a first receiving/transmitting unit and a second receiving/transmitting unit, wherein the first receiving/transmitting unit is disposed inside an electronic product, and the second receiving/transmitting unit is disposed Display the inside of the device. The first receiving/transmitting unit includes a first induction coil, a first modulation unit, a first current conversion unit, a first encoding/decoding unit, a first storage unit, a first microprocessor, and And a power supply circuit connected to the first current conversion unit. The second receiving/transmitting unit comprises a second induction coil, a second modulation unit, a second current conversion unit, a second encoding/decoding unit, a second storage unit and a second microprocessor.

The first and second induction coils are configured to receive/transmit radio frequency carrier signals.

The first and second modulation units modulate the carrier signal and restore the carrier signal.

The first and second current conversion units are used for current conversion of alternating current direct current or direct current alternating current.

The power supply circuit is configured to supply current to the electronic product after the first current conversion unit is converted, as the power of the electronic product system.

The first and second encoding/decoding units are respectively configured to encode data in the first storage unit and the second storage unit or an instruction input by the user.

The first and second storage units are configured to store image data and provide space for the first and second receiving/transmitting units to operate the system.

The first and second microprocessors are respectively configured to control the first and second induction coils, the first and second modulation units, the first and second converter units, and the first and second encoding/decoding units And the first and second storage units perform wireless image and power transmission.

A wireless image transmission method using the above image and power transmission device, comprising the steps of: identifying an electronic product and a display device; determining whether to perform wireless image and/or wireless energy transmission based on a user instruction; performing wireless image transmission; performing wireless energy transmission The step of transmitting the radio energy includes: the second receiving/transmitting unit generates an alternating current and transmits the energy of the alternating current by using a radio frequency signal; and the first receiving/transmitting unit senses and receives the energy of the alternating current Converting the sensed alternating current into a direct current; the power supply circuit uses the converted direct current to provide system power to the electronic product; determining whether to terminate the power transmission based on a user input command; and if so, terminating the power transfer If no, continue power transfer.

Compared with the prior art, the wireless image and power transmission device and method can realize the wireless interaction between the image and the electric energy between the electronic product and the display device by using the principle of the radio frequency, so that the image data of the electronic product can be synchronized to have a larger screen. The synchronous display on the display device improves the display effect, and avoids the inconvenience of connecting the electronic product and the display device by using the data line. In addition, the wireless image and the power transmission device are simultaneously transmitted by the electronic product and the display device for image data transmission. It can also convert the energy of wireless radio into electrical energy for system electronic product system operation or charge electronic products, which not only saves energy, but also improves the battery life of electronic products.

100‧‧‧First receiving/issuing unit

200‧‧‧second receiving/issuing unit

300‧‧‧Electronic products

400‧‧‧Display equipment

11‧‧‧First induction coil

12‧‧‧First Modulation Unit

13‧‧‧First converter unit

14‧‧‧First/Decoding Unit

15‧‧‧First storage unit

16‧‧‧First microprocessor

17‧‧‧Power supply circuit

18‧‧‧Charging circuit

21‧‧‧Second induction coil

22‧‧‧Second Modulation Unit

23‧‧‧Second converter unit

24‧‧‧Second/Decoding Unit

25‧‧‧Second storage unit

26‧‧‧ display screen unit

27‧‧‧Second microprocessor

1 is a schematic diagram of a wireless image and power transmission device of the present invention; 2 is a functional module diagram of the wireless image and power transmission device of FIG. 1; FIG. 3 is a flow chart of the wireless image and power transmission method of the present invention; FIG. 4 is a wireless image transmission method of the wireless image and power transmission method of FIG. Flowchart; FIG. 5 is a flow chart of wireless power transmission of the wireless image and power transmission method of FIG.

The present invention will be specifically described below with reference to the accompanying drawings.

Referring to FIG. 1 , a wireless image and power transmission device of the present invention includes a first receiving/transmitting unit 100 and a second receiving/transmitting unit 200. The first receiving/transmitting unit 100 is disposed inside an electronic product 300. The second receiving/transmitting unit 200 is placed inside a display device 400.

The first receiving/transmitting unit 100 and the second receiving/transmitting unit 200 can receive or transmit radio frequency signals, and the image data and the electric energy are realized between the electronic product 300 and the display device 400 through interaction of the wireless radio signals. transmission.

In this embodiment, the electronic product 300 is a digital camera, and the display device 400 is a liquid crystal display.

Referring to FIG. 2 , the first receiving/transmitting unit 100 includes a first induction coil 11 , a first modulation unit 12 connected to the first induction coil 11 , and a first modulation unit. 12 connected first converter unit 13, a first encoding/decoding unit 14 connected to the first modulation unit 12, a first storage unit 15 connected to the first encoding/decoding unit 14 and a first microprocessor 16 connected to the first modulation unit 12, the first current conversion unit 13, and the first encoding/decoding unit 14, the first current conversion unit 13 is further connected to a power supply circuit 17 and a charging Circuit 18.

The first induction coil 11 is configured to receive/transmit a radio frequency carrier signal for image data and power transmission.

The first modulation unit 12 is configured to modulate a carrier signal according to the image data of the electronic product 300, and output the modulated carrier signal to the first induction coil 11 and receive the second receiving/transmitting The carrier signal of the unit 200, and the received carrier signal is restored to obtain the encoded information.

The first current conversion unit 13 is configured to change a current characteristic, which can perform an AC/DC conversion, and output the converted DC power to the power supply circuit 17 when the AC is converted into a DC to give the electronic product 300 Power is supplied to the charging circuit 18 to store the electrical energy; when the direct current is converted to alternating current, the alternating current required for the first inductive coil 11 to transmit the radio frequency signal is provided.

The first encoding/decoding unit 14 is configured to encode the image data or the user instruction information, and then provide the first modulation unit 12 for modulation of the carrier signal, or the control after the first modulation unit 12 is restored. The code decoding is restored to the control command feedback to the first microprocessor 16 to perform the corresponding action.

The first storage unit 15 is configured to store image data of the electronic product 300 and provide a space for the first receiving/transmitting unit 100 to operate the system.

The first microprocessor 16 is configured to coordinate the first modulation unit 12 of the first receiving/transmitting unit 100, the first change based on a user input or a control instruction received from the second receiving/transmitting unit 200. The stream unit 13 and the first encoding/decoding unit 14 perform transmission and reception of video and electric energy.

The power supply circuit 17 is configured to provide a current after the first converter unit 13 is converted to the electronic product 300 as the power of the electronic product 300 system.

The charging circuit 18 is configured to supply a current converted by the first current converting unit 13 to a battery of the electronic product 300 as a reserve power of the electronic product 300.

The second receiving/transmitting unit 200 includes a second induction coil 21, and a second induction coil 21 Connected to a second modulation unit 22, a second converter unit 23 connected to the second modulation unit 22, and a second encoding/decoding unit 24 connected to the second modulation unit 22, a second storage unit 25 connected to the second encoding/decoding unit 24, a display screen unit 26 connected to the second storage unit 25, a second modulation unit 22, and a second current conversion unit 23 and the second code/code unit 24 are connected to the second microprocessor 27.

The second induction coil 21 is configured to receive/transmit RF signals for data and power transmission.

The second modulation unit 22 is configured to restore the RF carrier signal received from the first receiving/transmitting unit 100, obtain encoded information, and modulate a carrier signal based on a user command, and output the carrier signal to the first induction coil. 11.

The second current converting unit 23 is configured to change a current characteristic. In the embodiment, the main function is to convert the direct current into an alternating current to provide an alternating current required for the second coil 21 to emit an RF signal. The power of the display device 400 is connected.

The second encoding/decoding unit 24 is configured to decode the encoded information obtained by the second modulation unit 22, obtain image data or control instructions, or encode the control command to be transmitted for the second modulation. Unit 22 modulates the carrier signal.

The second storage unit 25 is configured to store image data or instruction information decoded by the second encoding unit and provide a space for the second receiving/transmitting unit 200 to operate the system.

The second microprocessor 27 is configured to coordinate the second modulation unit 21 and the second change of the second receiving/transmitting unit 200 based on a user input or a control instruction received from the second receiving/transmitting unit 200. The stream unit 22 and the second encoding/decoding unit 24 perform image and power transmission.

The display screen unit 26 is configured to display and play the image data received from the first receiving/transmitting unit 100.

When the first receiving/transmitting unit 100 is in operation, no special power source is needed to supply power, which converts the electromagnetic energy of the second receiving/transmitting unit 200 into electric energy for use by itself.

The distance between the first receiving/transmitting unit 100 and the second receiving/transmitting unit 200 needs to be within a certain range, so that the wireless image and the power transmitting device can transmit the wireless image and the power. To eliminate the impact of RF signal attenuation on normal wireless image and power transfer functions. According to Ampere's law, when a current flows through a coil, the magnetic field strength of the magnetic field around the coil can be calculated by the following formula:

Where H represents the strength of the magnetic field, I represents the current intensity flowing through the coil, R represents the radius of the coil, and d represents the distance from the center of the coil. Therefore, if the magnetic field strength at a certain distance is sufficient for wireless image and power transmission, This is achieved by varying the current intensity flowing through the coil and the radius of the coil.

In addition, the attenuation rate of the RF signal in the air is also related to the frequency of the RF signal. The higher the frequency of the RF signal, the lower the attenuation rate and the longer the transmission distance. In the wireless image and power transmission device of the present invention, the first receiving/transmitting unit 100 and the second receiving/transmitting unit 200 should be close to each other as possible, that is, the electronic product 300 and the Display device 400 should be as close as possible to reduce losses during energy transfer.

In an actual application, the display device 400 may be provided with a sensing platform (not shown), the second transceiver unit 200 is disposed inside the sensing platform, and the electronic product 300 is placed in the image and power transmission. On the sensing platform, the first inductive coil 11 and the second inductive coil 21 are aligned to minimize energy loss during wireless image and power transmission.

Please refer to FIG. 3, which illustrates a wireless image and power application of the wireless image and power transmission device. A flow chart of a transmission method, comprising the following steps:

S50, identifying the electronic product 300 and the display device 400. The second inductive coil 21 of the display device 400 emits a radio frequency signal covering a certain spatial range. Once the electronic product 300 enters the coverage of the radio frequency signal, the first sensing line can sense the radio frequency signal in 11 turns. A wireless connection is established with the display device 400.

S60. Determine whether to perform wireless image and/or wireless energy transmission based on user instructions. The display device or the electronic product transmits a request for wireless image and/or wireless power transmission to the wireless image and power transmission device according to an instruction input by the user, and the wireless image and the power device transmit the wireless image and/or the wireless energy according to the request.

S70, performing wireless image transmission.

S80, performing radio energy transmission.

If the request received by the wireless image and power transmission device 100 is image transmission, step S70 is performed. If the wireless image and power transmission device 100 receives the request for power transmission, step S80 is performed, if the wireless image and power transmission device 100 When the received request is image and power transmission, steps S70 and S80 are simultaneously performed.

Referring to FIG. 4, the wireless image transmission further includes the following steps: transmitting the image data by using the first receiving/transmitting unit, comprising the following steps: S701, encoding image data; S702, generating alternating current; S703, combining encoding The subsequent image data modulates the alternating current to generate a carrier signal; S704, transmitting the carrier signal to the second receiving/transmitting unit; Receiving the image data by using the second receiving/transmitting unit, comprising the following steps: S705, receiving the carrier signal; S706, demodulating the received carrier signal to obtain encoded image data; S707, demodulating The encoded image data is decoded to obtain image data; S708, storing or displaying and playing the image data; then the first receiving/transmitting unit performs step S709 to determine whether to end the image transmission based on the user instruction, and if so, End image transmission, if no, return to step S701 to continue image transmission.

Referring to FIG. 5, the method for transmitting radio energy further includes the following steps: transmitting power by using the second receiving/transmitting unit, comprising the steps of: S801, generating an alternating current; and S802, transmitting the alternating current by using an RF signal. The energy of the current is supplied to the first receiving/transmitting unit; and the first receiving/transmitting unit receives the electrical energy, which includes the following steps: S803, inductively receiving and receiving the energy of the alternating current; and S804, converting the induced alternating current into DC current; S805, using the DC current to provide system power or charging; S806, determining whether to terminate the power transmission based on the user input command, and if yes, ending the power transmission, if not, returning to step S801 to continue the power transmission.

The wireless image and power transmission device and method can realize the wireless interaction between the image and the electric energy between the electronic product and the display device by using the wireless radio frequency principle, so that the image data of the electronic product can be synchronously displayed on the display device having a larger screen. , improve the display effect while avoiding making The inconvenience of connecting the electronic product and the display device with the data line, and the transmission of the image data by the electronic product and the display device, the wireless image and the power transmission device can convert the energy of the radio frequency into the operation of the electronic product system. Charging electricity or charging electronic products not only saves energy, but also improves the battery life of electronic products.

100‧‧‧First receiving/issuing unit

200‧‧‧second receiving/issuing unit

11‧‧‧First induction coil

12‧‧‧First Modulation Unit

13‧‧‧First converter unit

14‧‧‧First/Decoding Unit

15‧‧‧First storage unit

16‧‧‧First microprocessor

17‧‧‧Power supply circuit

18‧‧‧Charging circuit

21‧‧‧Second induction coil

22‧‧‧Second Modulation Unit

23‧‧‧Second converter unit

24‧‧‧Second/Decoding Unit

25‧‧‧Second storage unit

26‧‧‧ display screen unit

27‧‧‧Second microprocessor

Claims (8)

A wireless image and power transmission device includes: a first receiving/transmitting unit and a second receiving/transmitting unit, wherein the first receiving/transmitting unit is disposed inside an electronic product, and the second receiving/transmitting unit The first receiving/transmitting unit includes a first induction coil, a first modulation unit, a first current conversion unit, a first encoding/decoding unit, and a first storage unit. a first microprocessor and a power supply circuit connected to the first current conversion unit, the second receiving/transmitting unit includes a second induction coil, a second modulation unit, and a second current conversion unit. a second encoding/decoding unit, a second storage unit and a second microprocessor; the first and second induction coils are configured to receive/transmit radio frequency carrier signals; and the first and second modulation unit modulations a carrier signal and a carrier signal are restored; the first and second converter units are used for current conversion of an alternating current direct current or direct current alternating current; the power supply circuit is configured to provide current after the first current converting unit is converted Giving the electronic product as the electronic product The first and second encoding/decoding units are respectively configured to encode data in the first storage unit and the second storage unit or a command input by the user; the first and second storage units a space for storing image data and providing a system operation for the first and second receiving/transmitting units respectively; the first and second microprocessors are respectively configured to control the first and second induction coils, respectively a second modulation unit, first and second converter units, first and second encoding/decoding units, first and second storage units and the power supply circuit for transmitting wireless images and electrical energy. The wireless image and power transmission device of claim 1, wherein the first receiving/transmitting unit further comprises a charging circuit connected to the first current converting unit, wherein the charging circuit is configured to a current after the current flow of the first current conversion unit is supplied to the battery of the electronic product, The electronic product reserves power. The wireless image and power transmission device of claim 2, wherein the first converter unit of the first receiving/transmitting unit outputs the converted direct current to the a power supply circuit for supplying power to the electronic product or outputting to the battery unit to store electrical energy, and the current converting unit of the first receiving/transmitting unit converts direct current into alternating current for providing the first coil to emit The AC current required for the RF signal. The wireless image and power transmission device of claim 1, wherein the second receiving/transmitting unit further comprises a display screen unit connected to the second storage unit, wherein the display screen unit is configured to display video material. The wireless image and power transmission device of claim 1, wherein the display device comprises a sensing platform, the first receiving/transmitting unit is disposed in the sensing platform, and the first sensing The coil and the second induction coil are aligned with each other. A wireless image and power transmission method, the application of which is performed by the wireless image and power transmission device according to any one of claims 1 to 5, the improvement comprising the steps of: identifying the electronic product and the display device; Determining whether to perform wireless image and/or wireless power transmission; performing wireless image transmission; performing radio energy transmission, the wireless energy transmission step: the second receiving/transmitting unit generates an alternating current and transmits the alternating current by using a radio frequency signal The energy of the current; the first receiving/transmitting unit senses and receives the energy of the alternating current, and converts the induced alternating current into a direct current; the power supply circuit uses the converted direct current as the electronic product Providing system power; determining whether to terminate the power transmission based on the user input command, and if so, terminating the power transmission, If no, continue with power transfer. The wireless image transmission method of claim 6, wherein the wireless image transmission method comprises the following steps: transmitting the image data by using the first receiving/transmitting unit, specifically comprising the steps of: encoding the image data; generating AC current; combining the encoded image data to modulate the alternating current to generate a carrier signal; transmitting the carrier signal; and receiving the image data by using the second receiving/transmitting unit, specifically comprising the steps of: receiving the carrier signal; The carrier signal is demodulated to obtain the encoded image data; the demodulated image data is decoded to obtain image data; the image data is stored or displayed and played; and the first receiving/transmitting unit determines based on the user instruction Whether to end the image transmission, if yes, the image transmission is ended, and if not, the image transmission is continued. The wireless image transmission method of claim 6, wherein the wireless power transmission method further comprises the step of: the charging circuit charging the electronic product by using the direct current.