SYSTEM ARCHITECTURE OF A TUNABLE LAMP SYSTEM
Some embodiments of this disclosure operate a LED-based lamp module in conjunction with a controller, such as a general-purpose mobile device or other light control system. The operations can include producing light at a current correlated color temperature (CCT) from a light source comprising an LED set of different color LEDs; authenticating a connection between a mobile device and the LED-based lamp module; receiving a target CCT for the LED-based lamp module; determining a target LED driving condition that produces the target CCT based on a color mixing plan stored in the LED-based lamp module; and adjusting the current CCT towards the target CCT by adjusting a current LED driving condition towards the target LED driving condition.
1 . A method of operating an LED-based lamp module, comprising:
producing light at a current correlated color temperature (CCT) from a light source comprising an LED set of different color LEDs;
authenticating a Bluetooth low energy (BLE) connection between a mobile device and the LED-based lamp module;
receiving a target CCT for the LED-based lamp module;
determining a target LED driving condition that produces the target CCT based on a color mixing plan stored in the LED-based lamp module; and
adjusting the current CCT towards the target CCT by adjusting a current LED driving condition towards the target LED driving condition.
2 . The method of claim 1 , wherein receiving the target CCT includes receiving a timer that indicates when to begin adjusting the current CCT to the target CCT value; and wherein adjusting the current CCT begins as indicated by the timer.
3 . The method of claim 1 , further comprising receiving an update of the color mixing plan from a computer server, wherein the update is relayed through the mobile device.
4 . The method of claim 1 , further comprising receiving an update of control logics to determine the target LED driving condition from a computer server, wherein the update is relayed through the mobile device.
5 . The method of claim 1 , further comprising determining a current operating temperature at the light source; wherein determining the target LED driving condition is further based on the current operating temperature at the light source.
6 . The method of claim 1 , wherein determining the current operating temperature includes measuring a junction temperature of the light source using a thermal sensor in the LED-based lamp module.
7 . The method of claim 1 , wherein determining the current operating temperature includes measuring a temperature level at a heat sink of the light source using a thermal sensor in the LED-based lamp module.
8 . The method of claim 1 , wherein determining the current operating temperature includes measuring a temperature level at a temperature pad of the light source using a thermal sensor in the LED-based lamp module.
9 . The method of claim 1 , wherein determining the current operating temperature includes estimating the current operating temperature based on a temperature variation model and a measured parameter.
10 . The method of claim 1 , wherein adjusting the current CCT towards the target CCT is by adjusting in discrete steps; further comprising computing the discrete steps to avoid jitter that is visually observable by a human.
11 . The method of claim 1 , wherein the current LED driving condition and the target LED driving condition respectively includes current levels to power each of the color LEDs in the LED set.
12 . The method of claim 1 , wherein the LED-based lamp module includes an integrated Bluetooth transceiver capable of communicating with an external device via a Bluetooth protocol.
13 . A method of operating a mobile device to configure a lamp module, comprising:
selecting an LED-based lamp module on a user interface of a light control application executing on an operating system of the mobile device;
authenticating a Bluetooth low energy (BLE) connection between the mobile device and the LED-based lamp module;
selecting a correlated color temperature (CCT) value for the LED-based lamp module on the user interface; and
sending the CCT value to the LED-based lamp module via the BLE connection.
14 . The method of claim 13 , wherein selecting the LED-based lamp module includes selecting a preset lamp group including the LED-based lamp module as a member.
15 . An LED-based lamp module comprising:
a light source comprising multiple LEDs of different colors;
a control interface configured to receive a digital signal designating a correlated color temperature (CCT);
electronic circuitry configured to drive the LEDs; and
a memory device storing a color mixing plan that dictates how the electronic circuitry is to drive the LEDs at different operating temperatures to achieve different CCT levels based on efficacy or brightness constraints;
wherein the electronic circuitry is configured to drive the LEDs to produce light at the designated CCT from the light source by referencing the color mixing plan.
16 . The LED-based lamp module of claim 15 , wherein the control interface is a Bluetooth low energy chip.
17 . The LED-based lamp module of claim 15 , wherein the control interface is integrated with the electronic circuitry.
18 . The LED-based lamp module of claim 15 , further comprising a temperature sensor thermally coupled to the light source.
19 . The LED-based lamp module of claim 15 , further comprising a light sensor that provides color spectrum feedback of the produced light to the electronic circuitry.
20 . The LED-based lamp module of claim 19 , wherein the color spectrum feedback is a spectrum analysis of mixed light from the LEDs that are in close proximity with each other.