CN102185529B - Wireless charging system, light source-providing device and charging device - Google Patents

Abstract

The present invention proposes a kind of wireless charging system, including: light source-providing device, described light source-providing device is used for the light launching specific band to provide the spectral energy in specific band; And photoelectric conversion device, described photoelectric conversion device has light baffle, and described smooth baffle has high photoelectric transformation efficiency so that described spectral energy is converted into electric energy for the spectral energy in described specific band. The embodiment of the present invention provides the light of specific band by light source-providing device for photoelectric conversion device such that it is able to be greatly enhanced the charge efficiency of wireless charging.

Description

Wireless charging system, light source providing device and charging device

technical field

The invention relates to the technical field of electronic equipment manufacturing, in particular to a wireless charging system, a light source providing device and a charging device.

Background technique

With the continuous improvement of people's living standards, various mobile electronic devices are becoming more and more powerful and widely used. However, with the powerful functions, the power consumption problem of mobile electronic devices is also becoming more and more prominent. Therefore, how to charge the mobile electronic device in time has become an urgent problem to be solved. The traditional wired charging method needs to connect the power supply and the charged device such as a mobile phone through a cable, so it is very troublesome, especially when charging several different devices at the same time, it will increase the user's burden. Moreover, the wired charging interfaces between various devices are various and cannot be used universally, resulting in the existence of a large number of chargers with different types of interfaces, resulting in a great waste of resources. Therefore, people have developed a wireless charging method, which can get rid of the troubles of cables and various interfaces through wireless charging, which greatly facilitates people's lives. However, most of the existing wireless charging methods use the principles of microwave, electromagnetic induction, and magnetic resonance for wireless charging, that is, most of them use radio waves to achieve energy transmission, so the structure is very complicated and the cost is high. The size, position and angle of the coil between the device and the charged device are heavily dependent, so devices from different manufacturers cannot be used universally, which makes it very inconvenient to use. What's more serious is that the leaked electromagnetic radiation may cause potential serious harm to the human body, especially pregnant women and babies. Therefore, there is a need for a more convenient, fast, and energy-saving wireless charging method.

Contents of the invention

The purpose of the present invention is to solve at least one of the above-mentioned technical defects, especially the defects of complex structure and low charging efficiency of the current wireless charging method.

In order to achieve the above object, the present invention proposes a wireless charging system in one aspect, comprising: a light source providing device, the light source providing device is used to emit light of a specific wavelength band to provide spectral energy in a specific wavelength band; and a photoelectric conversion device, the The photoelectric conversion device has a light absorption plate having a high photoelectric conversion efficiency for spectral energy in the specific wavelength band to convert the spectral energy into electrical energy.

In the embodiments of the present invention, the light source providing device provides the photoelectric conversion device with light of a specific wavelength band, thereby greatly improving the charging efficiency of wireless charging.

In one embodiment of the present invention, the light absorbing plate includes a multi-junction photovoltaic cell made of SiC or III-V compound semiconductor material, and the band gap of the compound semiconductor material corresponds to the specific wavelength band. The conversion efficiency of the multi-junction direct bandgap compound semiconductor material light absorption plate can reach more than 70%, such as InGaN, InGaP, AlGaN and other batteries, if combined with purple LED or blue LED, etc., can achieve very high power transmission efficiency.

In one embodiment of the present invention, the light source providing device further includes: a light emitting module, configured to emit light of a specific wavelength band to provide spectral energy within a specific wavelength band; and a power supply management module, configured to supply power to the light emitting module.

In one embodiment of the present invention, the light source providing device further includes: a reflective layer located at the rear end of the light emitting module.

In one embodiment of the present invention, the light-emitting module is an LED, an LED array or a low-power laser.

In one embodiment of the present invention, the LED or LED array includes one or more of white LEDs, blue LEDs, ultraviolet LEDs and violet LEDs.

In one embodiment of the present invention, it further includes: a sensing unit for detecting the area and/or position of the electronic device placed on the light source providing device, and a control module for selectively turning on the electronic device according to the area/or position Part or all of the light emitting module. In one embodiment of the present invention, the sensing unit is a capacitive touch screen, a resistive touch screen, a light sensor or a pressure sensor.

In one embodiment of the present invention, it further includes: a light concentrating unit, the light concentrating unit is used for concentrating the light emitted by the light emitting module.

Another aspect of the present invention also proposes a light source providing device, including: a light emitting module, the light emitting module is used to emit light of a specific wavelength band to provide spectral energy in a specific wave band; and a power supply management module, the power supply management module uses for supplying power to the light-emitting module.

In one embodiment of the present invention, the light-emitting module is an LED, an LED array or a low-power laser.

In one embodiment of the present invention, specifically, the LED and the LED array include one or more of white LEDs, blue LEDs (conversion efficiency above 60%), ultraviolet LEDs or purple LEDs (conversion efficiency above 80%) kind.

In one embodiment of the present invention, it further includes: a sensing unit, the sensing unit is used to selectively turn on a part of the light emitting module or all. In one embodiment of the present invention, the sensing unit is a capacitive touch screen, a resistive touch screen, a light sensor or a pressure sensor. In the embodiment of the present invention, the sensing unit can selectively turn on a part of the corresponding light-emitting modules according to the size of the electronic device, so that the versatility of the light source providing device can be realized.

In one embodiment of the present invention, it further includes: a light concentrating unit configured to condense the light emitted by the light emitting module, for example, a Fresnel focusing lens may be used. In the embodiment of the present invention, the light emitted by the large LED array can be concentrated to the photoelectric conversion device through the light concentrating unit, thereby improving the charging speed and charging efficiency.

In one embodiment of the present invention, it further includes: a reflective layer located at the rear end of the light-emitting module, through which the utilization rate of light can be improved, thereby further improving the photoelectric conversion efficiency.

On the other hand, the embodiment of the present invention also proposes a charging device, including: a light absorbing plate, the light absorbing plate has a high photoelectric conversion efficiency for the spectral energy in the specific wave band to convert the spectral energy into electrical energy and an electric storage unit, the electric storage unit is connected to the light absorbing plate to store the electric energy.

In one embodiment of the present invention, the light absorbing plate includes a multi-junction photovoltaic cell made of SiC or III-V compound semiconductor material, and the band gap of the compound semiconductor material corresponds to the specific wavelength band.

On the other hand, the embodiments of the present invention also provide an electronic device, including the above-mentioned charging device.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a structural diagram of a wireless charging system according to an embodiment of the present invention;

2 is a schematic diagram of a light source providing device charging an electronic device with a photoelectric conversion device according to an embodiment of the present invention;

3 is a perspective view of the light source providing device according to the embodiment of the present invention charging an electronic device with a photoelectric conversion device;

4 is a schematic diagram of a light source providing device according to an embodiment of the present invention;

5 is a schematic diagram of another embodiment of the present invention, a light source providing device charging an electronic device with a photoelectric conversion device;

6 is a structural diagram of a light source providing device according to an embodiment of the present invention;

Fig. 7 is a structural diagram of a charging device according to an embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

As shown in FIG. 1 , it is a structural diagram of a wireless charging system according to an embodiment of the present invention. The wireless charging system includes a light source providing device 100 and a photoelectric conversion device 200 . The light source providing device 100 is used for emitting light of a specific wavelength band to provide spectral energy within the specific wavelength band. The photoelectric conversion device 200 has a light-absorbing plate having high photoelectric conversion efficiency for spectral energy in a specific wavelength band to convert spectral energy into electrical energy, thereby realizing wireless charging of electronic devices. In the embodiment of the present invention, the light source providing device 100 provides the photoelectric conversion device 200 with light of a specific wavelength band, thereby greatly improving the charging efficiency of wireless charging.

In one embodiment of the present invention, the light absorbing plate includes a multi-junction photocell made of SiC or III-V compound semiconductor materials, the forbidden band width of the compound semiconductor materials corresponds to the specific wavelength band, such as SiC, InGaN , AlGaN, InGaP or InGaNAs, etc. Specifically, for example, the light source providing device includes a high-power, high-brightness LED or an LED array, such as a blue LED, an ultraviolet LED, or a purple LED. In another embodiment of the present invention, the light source providing device may further include a low-power laser.

In the embodiment of the present invention, the conversion efficiency of the multi-section direct bandgap compound semiconductor material light-absorbing plate can reach more than 70%, such as SiC, InGaN, InGaP, AlGaN or InGaNAs and other batteries. If purple LEDs or blue LEDs are used together, it can achieve Very high power transfer efficiency.

In one embodiment of the present invention, electronic equipment can also use transparent thin-film batteries or common solar cells as photoelectric conversion devices 200, such as installing transparent thin-film solar cells on the screen of a mobile phone. Although the conversion efficiency will be lower, it is convenient. It has no effect on the appearance of the product after use.

In one embodiment of the present invention, the light source providing device includes a high-power and high-brightness LED, an LED array or a low-power laser. Specifically, the LED array includes one or more of white LEDs, blue LEDs (60% conversion efficiency), ultraviolet LEDs or violet LEDs (80% conversion efficiency).

As shown in FIG. 2 , it is a schematic diagram of a light source providing device according to an embodiment of the present invention charging an electronic device with a photoelectric conversion device. As shown in FIG. 3 , it is a perspective view of a light source providing device according to an embodiment of the present invention charging an electronic device with a photoelectric conversion device. As shown in FIG. 4 , it is a schematic diagram of a light source providing device according to an embodiment of the present invention. In the embodiment of the present invention, the light source providing device 100 is in the form of a plate, so that the electronic device can be placed on the light source providing device 100. When wireless charging is performed, the surface of the light absorbing plate in the photoelectric conversion device 200 and the light source on the electronic device Opposite the providing device 100 , preferably, the light source providing device 100 and the photoelectric conversion device are in contact with each other, so that most of the light emitted by the light source providing device can enter the photoelectric conversion device 200 . However, it should be noted that although the light source providing device 100 is in direct contact with the photoelectric conversion device 200 in this figure, since the light has a characteristic of very little attenuation in a short distance and does not cause radiation effects on the surroundings, the light source provides The device 100 and the photoelectric conversion device 200 may also be separated by a predetermined distance.

In an embodiment of the present invention, in order to avoid the defect that all the LED arrays of the light source providing device 100 are turned on when a small electronic device is placed on the light source providing device, thereby causing unnecessary waste. In the present invention, the light source providing device 100 further includes a sensing unit 130, the sensing unit 130 is used to detect the area and/or position of the electronic device placed on the light source providing device 100, and the control module 160 is used to detect the area and/or position of the electronic device according to the area/ Or position selectively turn on a part or all of the light emitting modules 110 . Preferably, the sensing unit 130 is a capacitive touch screen, a resistive touch screen, a light sensor or a pressure sensor. In the embodiment of the present invention, the sensing unit 130 can selectively turn on a part of the corresponding light-emitting modules according to the size of the electronic device, so that the versatility of the light source providing device 100 can be realized.

In one embodiment of the present invention, the light source providing device 100 further includes a reflective layer 140 located at the rear end of the light emitting module 110, through which the light utilization rate can be improved, thereby further improving the photoelectric conversion efficiency.

As shown in FIG. 5 , it is a schematic diagram of another embodiment of the present invention for a light source providing device to charge an electronic device with a photoelectric conversion device. In this embodiment, a condenser lens is provided between the light source providing device 100 and the photoelectric conversion device 200 to converge the light emitted by the light source providing device 100 , thereby improving the photoelectric conversion efficiency and charging energy density. In other embodiments of the present invention, a Fresnel focusing lens and the like may also be used.

In other embodiments of the present invention, the light source providing device 100 can also be arranged above, so as to charge a plurality of electronic devices below with the photoelectric conversion device 200 .

In the embodiment of the present invention, in order to increase the versatility of the light source providing device, even if the light source providing device can be used for charging smaller mobile terminals such as mobile phones and iPhones, it can also be used for charging larger mobile terminals such as iPads, handheld computers, and notebooks. The terminal equipment is charged, so generally the size of the light source providing device is larger than that of the electronic equipment. As shown in FIG. 3 , two photoelectric conversion devices 200 of different sizes can be charged simultaneously on one light source providing device 100 .

As shown in FIG. 6 , it is a structural diagram of a light source providing device according to an embodiment of the present invention. The light source providing device 100 includes a light emitting module 110 and a power supply management module 120 . The light emitting module 110 is used for emitting light of a specific wavelength band to provide spectral energy within a specific wavelength band. The power supply management module 120 is used for supplying power to the light emitting module 110 .

In order to avoid the defect that all LED arrays of the light source providing device 100 are turned on when a small electronic device is placed on the light source providing device, thereby causing unnecessary waste. In the present invention, the light source providing device 100 further includes a sensing unit 130 and a control module 160, the sensing unit 130 is used to detect the area and/or position of the electronic device placed on the light source providing device 100, and the control module 160 is used to The area and/or location of the device selectively turns on a part or all of the light emitting modules 110 . Preferably, the sensing unit 130 is a capacitive touch screen, a resistive touch screen, a light sensor or a pressure sensor. In the embodiment of the present invention, the sensing unit 130 can selectively turn on a part of the corresponding light-emitting modules according to the size of the electronic device, so that the versatility of the light source providing device 100 can be realized.

In one embodiment of the present invention, the light source providing device 100 further includes a light concentrating unit for concentrating the light emitted by the light emitting module, for example, a Fresnel focusing lens may preferably be used. In the embodiment of the present invention, the light emitted by a large LED array can be concentrated to the photoelectric conversion device through the light concentrating unit, thereby improving the photoelectric conversion efficiency and charging energy density.

As shown in FIG. 7 , it is a structural diagram of a charging device according to an embodiment of the present invention. The charging device 300 includes a light absorbing plate 310 and a power storage unit 320 . The light absorbing plate 310 has high photoelectric conversion efficiency for spectral energy within a specific wavelength band to convert the spectral energy into electrical energy. The power storage unit 320 is connected to the light absorbing plate 310 to store electric energy, so as to provide power for electronic devices. The light absorbing plate of the embodiment of the present invention can achieve high conversion efficiency for spectral energy in a specific wavelength band, thereby improving charging efficiency.

In one embodiment of the present invention, the light absorbing plate 310 includes a multi-junction photovoltaic cell made of SiC or III-V compound semiconductor materials, the forbidden band width of the compound semiconductor materials corresponds to the specific wavelength band, such as SiC, InGaN , InGaP, AlGaN or InGaNAs, etc.

An embodiment of the present invention also provides an electronic device, including the above-mentioned charging device.

The wireless charging system of the embodiment of the present invention also has the following advantages,

1. The energy transmission medium uses light instead of electromagnetic waves, so there is no electromagnetic radiation hazard and absolutely harmless to the human body;

2. The area of the light source supply device can be made very large, so it can charge multiple devices at the same time, which has strong versatility. At the same time, it can control only the light source at the charging position to turn on according to the need, so it is very energy-saving;

3. The energy transmission density can be made very large. Unlike the electromagnetic charging method, which requires precise adjustment of the coil size and position to obtain the required voltage and power, different light absorbing plate areas mean different power, which is required for mobile devices. Different voltages can use different light absorbing plates;

4. No electromagnetic compatibility problem, no leakage of electromagnetic radiation, no impact on other electronic components and electronic equipment, no interference with other wireless communication signals, such as mobile phone signals;

5. The light energy attenuates less with the increase of distance, and the effective transmission distance is longer. Unlike electromagnetic charging, which requires near-field coupling or complex directional beam technology;

6. The light source supply device adopts a flat structure with small light leakage and very little impact on the environment or human body;

7. It is suitable for various shell materials, and can charge mobile devices using various shell materials, such as devices with leather covers, plastic shells, metal shells, etc. Electromagnetic charging equipment is helpless for metal shell devices , it is difficult to achieve satisfactory results;

8. The photoelectric conversion device can still provide a certain conversion efficiency under sunlight. In the absence of a charging power source, it can be charged urgently through sunlight or other light sources. It is used in emergency situations. Electromagnetic induction charging must be used in any case. There is an external power supply to charge;

9. Since the voltage and power requirements of different mobile devices are mainly realized by adjusting the structure of the light absorbing plate, the light source providing device also has the advantage of high compatibility, which can take into account different standards of different companies, and does not need a unified standard. It is enough to meet the basic requirements, so different devices can be used in common functions, but the energy transmission efficiency may be somewhat different.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. A wireless charging system, characterized in that, comprising: A light source providing device, the light source providing device is used to emit light of a specific wavelength band to provide spectral energy within a specific wavelength band; and A photoelectric conversion device having a light absorbing plate having a high photoelectric conversion efficiency for spectral energy within the specific wavelength band to convert the spectral energy into electrical energy, wherein the light absorbing The panel includes a multi-junction photovoltaic cell made of SiC or III-V compound semiconductor material, and the forbidden band width of the compound semiconductor material corresponds to the specific wave band. 2. The wireless charging system according to claim 1, wherein the light source providing device further comprises: a light emitting module, configured to emit light of a specific wavelength band to provide spectral energy within the specific wavelength band; and The power supply management module is used to supply power to the light emitting module. 3. The wireless charging system according to claim 2, wherein the light source providing device further comprises: The reflective layer located at the rear end of the light emitting module. 4. The wireless charging system according to claim 2, wherein the light-emitting module is an LED, an LED array or a low-power laser. 5. The wireless charging system according to claim 4, wherein the LED or LED array comprises one or more of white LEDs, blue LEDs, ultraviolet LEDs and purple LEDs. 6. The wireless charging system according to claim 2, further comprising: a sensing unit for detecting the area and/or position of the electronic device placed on the light source providing device; and The control module is used for selectively turning on a part or all of the light emitting modules according to the area/or location of the electronic device. 7. The wireless charging system according to claim 6, wherein the sensing unit is a capacitive touch screen, a resistive touch screen, a light sensor or a pressure sensor. 8. The wireless charging system according to claim 2, further comprising: A light concentrating unit, the light concentrating unit is used for concentrating the light emitted by the light emitting module.