Patent Application
20140097767
1. Technical Field
The disclosure is related to a smart lighting system, and particularly to a smart lighting system operated by a remote control to adjust its brightness.
2. Description of Related Art
Efficient lighting is replacing old fashioned energy-hungry incandescent light bulbs and halogen spotlights. Lighting devices with light emitting diodes (LEDs) are used in many common applications. To adjust brightness, dimmers for the LEDs are required to provide a range of currents for driving the LEDs.
Lighting apparatus in living rooms, bedrooms, and dining rooms have different lighting requirements. The lighting requirements may be affected by location of the house, incident angles of sunlight, and decoration style. However, known dimmers of related art available on the market, are incompatible amongst different manufacturers and are incapable of meeting all the different lighting requirements for the lighting apparatuses in different areas of the house. Multi-purpose dimmers capable of meeting various requirements for lighting and reducing energy consumptions of the lighting apparatuses are therefore desirable.
The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of a smart lighting system.
The disclosure is described with reference to FIG 1.
The controller 14 is installed inside the lighting apparatus 12. The controller 14 includes a communication interface 142, a user identification device (UID) 144, a encryption system 146, and a dimmer 148. The remote control 16 is adapted to communicate with the communication interface 142 via a signal communication device 161 of the remote control 16. The remote control 16 is adapted to generate and transmit signals including double tone multi-frequency (DTMF) signals, frequency shift keying (FSK) signals, or orthogonal frequency division multiplexing (OFDM) signals. The remote control 16 may be a remote, a smart phone, a tablet, or other hand-held device. The signal communication device 161 may be an infrared (IR) transmitter/receiver, a BLUETOOTH device, a WiFi device, a voice control device that passes the signals through a telephone wire, a wireless router, a home network, an internet server, or a cloud server.
When a user operates the remote control 16 and makes the remote control 16 generate and transmit signals to the communication interface 142 of the controller 14. The encryption system 146 encrypts and. decrypts the signals between the remote control 16 and the controller 14. The aforementioned signals between the communication interface 142 and the remote control 16 are further transmitted to the UID 144. The UID 144 is adapted to confirm an identification of a user who operates the remote control 16 and to authenticate the remote control 16.
Subject to the authentication described in the foregoing paragraph, when the communication interface 342 receives signals for adjusting brightness of the lighting apparatus 12, the dimmer 148 modulates electrical currents from the power supply 18 by a pulse-width modulation (PWM) technique to adjust brightness of the lighting apparatus 12 among several levels. The PWM is performed by a metal-oxide-semiconductor field-effect transistor (MOSFET) within the dimmer 148 that repeatedly turns on and off to provide an overall and stable current of a reference voltage for the lighting apparatus 12. By modulating the switch duty ratio of the MOSFET, the level of the current is modulated to adjust the brightness of the lighting apparatus 12.
An analog-to-digital converter (ADC) 140 is installed within the controller 14. The communication interface 142, the UID 144, the encryption system 146, and the dimmer 148 pass the signals through the ADC 140. The signals transmitted to the ADC may be analog inputs, reference voltage inputs, pulse inputs, or power inputs and are converted to digital outputs for further transmission within the controller 14. The digital signals are processed and stored in the controller 14 to make the controller 14 operate faster and therefore enhance the efficiency of the lighting apparatus 12.
It is to be understood, however, that even though numerous characteristics and advantages of the present embodiments have been set fourth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 101137118 | Oct 2012 | TW | national |
