Patent ID: 8556438

Claim:
An LED module system comprising an LED module, a light sensor, and a control system, the LED module comprising a first and a second LED sub-module disposed on a thermally-conducting sub-mount, wherein: the first LED sub-module includes: a first semiconductor LED for generating light when activated, the first LED being in thermal contact with the sub-mount; a first thermally-conducting reflector cup, the first LED being disposed in the first reflector cup; and, a first wavelength converting element (WCE) at least partially in contact with the first reflector CUP and at least partially disposed over a surface of the first LED such that the light emitted from the first LED is incident on the first WCE and is re-emitted at a substantially different wavelength; and, the second LED sub-module includes: a second semiconductor LED for generating light when activated, the second LED being in thermal contact with the sub-mount and constructed in the same semiconductor material system as the first LED; a second thermally-conducting reflector cup, the second LED being disposed in the second reflector cup; and, a second wavelength converting element (WCE) at least partially in contact with the second reflector CUP and at least partially disposed over a surface of the second LED such that the light emitted from the second LED is incident on the second WCE and is re-emitted at a substantially different wavelength, the second WCE having different wavelength converting properties to the first WCE, wherein the total light emitted by the LED module comprises the light generated from the first LED and first WCE and the light generated from the second LED and second WCE, the LED module being configured to emit the total light having a predefined colour chromaticity when one or more activation properties of the first and second LED are managed, wherein the light sensor is orientated to measure the colour chromaticity properties of at least part of the total light emitted by the LED module, and wherein the control system is configured for managing activation properties of the first and second LEDs in the LED module when activated, the control system being coupled to the light sensor and adapted to provide feedback to modify the activation properties of the first and second LEDs to achieve the predefined colour chromaticity for the total light emitted by the LED module and also a colour rendering index (CRI) greater than a predefined minimum CRI.