METHOD FOR IDENTIFICATION OF A LIGHT INDUCTIVE CHARGER

• US 20110298419A1
• Filed: 05/26/2011
• Published: 12/08/2011
• Est. Priority Date: 06/03/2010
• Status: Active Grant

• Current Assignee: Fu Da Tong Technology Co., Ltd.
• Original Assignee: Fu Da Tong Technology Co., Ltd.
• Inventors: TSAI, Ming-Chiu, CHAN, Chi-Che
• Granted Patent: US 8,729,852 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The present invention relates to a method for identification of a light inductive charger, in which a power base includes a light receiving hole to expose a light receiver, and a light emitting component is established in a light emitter of a wireless charging receiver to emit lights towards the light receiving hole. The power base transmits electromagnetic wave energy to the receiving terminal for a short period of time when finding it covered by an object, in a dark place or covered by the wireless charging receiver after having received lights from the light receiver through the light receiving hole and transmitted the signals to the microprocessor via a voltage detection circuit. The charging module of the wireless charging receiver, if not fully charged, feeds back light signals for the same time period to indicate that charging is required. Then charging energy of electromagnetic waves will be emitted to start charging.

Claims

1. A method for identification of a light inductive charger, wherein the light inductive charger comprises a power base and a wireless charging receiver, in which the body of the power base has a light receiving hole for the light receiver to stand out, and the wireless charging receiver includes a light emitter comprising a light emitting component that can emit lights towards the light receiving hole;

the execution steps are as follows;

(a) Put the light receiver of the emitting terminal in standby mode, switch on the power base and set to read light signals from the light receiver through the light receiving hole;

(b) Check light sources, and transmit signals from the light receiver to the microprocessor for determination purpose via the voltage detection circuit;

(c) Decide on brightness, if it is bright, proceed to step (d);

otherwise, proceed to step (e);

(d) No power supply without any cover or in bright places, if there is no electromagnetic wave energy is emitted, the light receiver will receive bright light rays and decide that no wireless charging receiver is placed on the power base, or there is no cover or the light receiver is in a bright place, so no power supply is needed, then proceed to step (a) again;

(e) If there is any cover or the light receiver is in a dark place, when it suddenly darkens or the light receiver is always in a dark place, it is likely that the charging module is fully charged and the light emitting component will not respond;

(f) Transmit electromagnetic wave energy to the receiving terminal in a short period of time, and if the charging module of the wireless charging receiver is not fully charged, it will feed light signals in the same period of time as the electromagnetic wave energy to the light receiver so as to enable the light emitting component to emit lights towards the light receiver in order to respond to the power base;

this state shall be understood as requiring charging;

(g) Decide on responses and the state of responses includes charging required and charging not required;

if the light is dark, proceed to step (h);

if the light is bright for a short period of time, proceed to step (i);

(h) If there is no response, it means that no compatible receiving terminal of the wireless charging receiver is placed or that the charging module is fully charged without the need to supply power;

(i) If there is any response, it indicates that the receiving terminal begins to transmit power, and the power base will begin to supply power to the wireless charging receiver upon confirmation of responses, and the light emitting component is continuously switched on in the charging process;

(j) Recheck following a preset time period of charging, and the charging module will recheck at an interval of a time predetermined period;

if the charging module is fully charged, it will not feed light signals to the light emitter and the charging process will be interrupted.

2. The method for identification of a light inductive charger according to claim 1, wherein the power base includes a microprocessor electrically connected with a power supply circuit which can be connected to an external power supply, and the microprocessor is electrically linked with a driving circuit that contains a MOSFET array which is further connected with a power supply resonance circuit electrically;

the power supply resonance circuit electrically connects to a power supply coil capable of transmitting energy, and is connected in parallel with the light receiver and a voltage detection circuit that can detect changes in voltages of the power supply resonance circuit and light emitter, convert these voltage changes into electric signals and transmit them to the microprocessor to decide on power transmission.

3. The method for identification of a light inductive charger according to claim 2, wherein the microprocessor of the power base includes a software program capable of examining and analyzing power output from the power supply resonance circuit as well as light receiving status of the light receiver by using the voltage detection circuit, so as to decide if power supply to the wireless charging receiver is needed or not.

4. The method for identification of a light inductive charger according to claim 2, wherein the microprocessor of the power base is electrically connected with a display module capable of indicating operational status, and the display module may be a status indicator lamp, a seven-segment display or a LCD consisting of one or more LEDs.

5. The method for identification of a light inductive charger according to claim 2, wherein the power supply circuit of the power base is electrically connected with a power output interface, which can connect to an external power source and may be a USB, A/C transformer or commercial electricity connector.

6. The method for identification of a light inductive charger according to claim 1, wherein the wireless charging receiver includes a power receiving coil to receive power energy through electromagnetic induction, in which the power receiving coil is electrically connected to a receiving resonance circuit which further connects to a rectifying filter circuit able to receive transmitted A/C power input and convert it into D/C power for output;

the rectifying filter circuit connects electrically to a break protection circuit that can receive the signals transmitted, convert these signals into light signals and feed back the light signals to the light emitter, while the break protection circuit is electrically connected with the charging module capable of receiving D/C power from the rectifying filter circuit for charging purpose and of supplying D/C power to an electronic device, so that the break protection circuit can disconnect the rectifying filter circuit and cut off the power supply without feeding back light signals to the light emitter when deciding the charging module is fully charged.

7. The method for identification of a light inductive charger according to claim 6, wherein the charging module of the wireless charging receiver includes is electrically connected with a power output interface connecting to a proposed electronic device, and the power output interface may be a USB or D/C plug or socket installed in the proposed electronic device.

8. The method for identification of a light inductive charger according to claim 8, wherein the method for determining brightness in step (c) is to use programs embedded in the microprocessor to examine changes of lights continuously through comparison between the light in at a previous time point and the current light;

gradual darkening may be the process from daylights to nights, while sudden darkening may be caused by covering the light receiving hole on the power base.