Selecting parameters in a color-tuning application
View Patent ↗Various embodiments include apparatuses enabling a single color-tuning device to select both a correlated color temperature (CCT) and a distance to the black body line (BBL) in a color-tuning application. In one embodiment, a color-tuning device includes a slider to divide an applied voltage to provide a signal related to at least one of CCT and D uv from the black body line. A finite-state machine is coupled to the color-tuning device to determine a subsequent action to take based on both a current position and a previous position of the slider. A lamp is coupled to the color-tuning device and has a desaturated red (R) LED, a desaturated green (G) LED; and a desaturated blue (B) LED; each of the at least one desaturated R LED, the desaturated G LED; and the desaturated B LED having coordinates on a chromaticity diagram that are in proximity to the black body line.
1. A color-tuning apparatus, comprising:
a color-tuning device having a slider located thereon, the slider being a one-dimensional mechanism to divide a voltage applied to the color-tuning device, the divided voltage being configured to provide a signal related to at least one of a correlated color temperature (CCT) and a coordinate distance (D uv ) from a black body line;
a finite-state machine coupled to the color-tuning device to determine a subsequent action to take, with regard to at least one of CCT and D uv , based on both a current position and a previous position of the slider;
a controller to receive a plurality of signals from the color-tuning device and correlate the plurality of signals to actions indicated in the finite-state machine, the controller including a plurality of light-emitting diode (LED) drivers; and
a lamp coupled to the controller and having at least one desaturated red (R) LED, at least one desaturated green (G) LED; and at least one desaturated blue (B) LED; each of the at least one desaturated R LED, the desaturated G LED; and the desaturated B LED having coordinates on a chromaticity diagram that are in proximity to the black body line.
2. The apparatus of claim 1 , wherein the color-tuning device is a 0 volt to 10 volt dimmer to function as a one-dimensional control device to set both the CCT and the D uv of the lamp.
3. The apparatus of claim 1 , wherein the slider of the color-tuning device is divided into a plurality of zones.
4. The apparatus of claim 3 , wherein the slider is divided into seven zones.
5. The apparatus of claim 4 , wherein:
a first position of the slider and a last position of the slider are configured, respectively, to control the lamp to a subsequently higher color temperature and a subsequently lower color temperature; and
mid-range positions of the slider are configured to control the lamp to a pre-determined coordinate position selected from a value of D uv above the BBL and a value of D uv below the BBL.
6. The apparatus of claim 5 , wherein a maximum value of the D uv is at seven steps on a MacAdam Ellipse.
7. The apparatus of claim 1 , wherein values of D uv include coordinate steps sizes of ±0.006, ±0.003, and 0.
8. The apparatus of claim 3 , wherein the slider is divided into four zones.
9. The apparatus of claim 1 , wherein the correlated color temperature (CCT) and the coordinate distance (D uv ) from a black body line comprise a two-dimensional color space.
10. The apparatus of claim 1 , further comprising a dimmer coupled in series with the color-tuning device and the lamp to control flux dimming of the lamp.
11. The apparatus of claim 1 , wherein all combinations of CCT and D uv selected result in a color-rendering index (CRI) of the lamp of about 90 or greater.
12. A color-tuning device, comprising:
a voltage-divider mechanism, the voltage-divider mechanism being a one-dimensional mechanism to divide a voltage applied to the color-tuning device, the divided voltage being configured to provide a signal related to at least one of a correlated color temperature (CCT) and a coordinate distance (D uv ) from a black body line for at least one light-emitting diode (LED)-based lamp; and
a finite-state machine coupled to the voltage-divider mechanism to determine a subsequent action to take, with regard to at least one of CCT and D uv , based on both a current position and a previous position of the voltage-divider mechanism.
13. The color-tuning device of claim 12 , further comprising a controller to receive a plurality of signals from the color-tuning device and correlate the plurality of signals to actions indicated in the finite-state machine, the controller including a plurality of light-emitting diode (LED) drivers.
14. The color-tuning device of claim 12 , further comprising a lamp coupled to the controller and having at least one desaturated red (R) LED, at least one desaturated green (G) LED; and at least one desaturated blue (B) LED; each of the at least one desaturated R LED, the desaturated G LED; and the desaturated B LED having coordinates on a chromaticity diagram that are in proximity to the black body line.
15. The color-tuning device of claim 12 , wherein the color-tuning device is a 0 volt to 10 volt dimmer to function as a one-dimensional control device to set both the CCT and the D uv of the lamp.
16. A system to control color-tuning of an illumination device, the system comprising:
a color-tuning device having a voltage-divider mechanism located thereon, the voltage-divider mechanism being a one-dimensional mechanism to divide a voltage applied to the color-tuning device, the divided voltage being configured to provide a signal related to at least one of a correlated color temperature (CCT) and a coordinate distance (D uv ) from a black body line (BBL) for the illumination device;
a finite-state machine coupled to the color-tuning device to determine a subsequent action to take, with regard to at least one of CCT and D uv , based on both a current position and a previous position of the voltage-divider mechanism;
and
a lamp coupled to the controller and having at least one desaturated red (R) light-emitting diode (LED), at least one desaturated green (G) LED; and at least one desaturated blue (B) LED; each of the at least one desaturated R LED, the desaturated G LED; and the desaturated B LED having coordinates on a chromaticity diagram that are in proximity to the black body line.
17. The system of claim 16 , further comprising a controller to receive a plurality of signals from the color-tuning device and correlate the plurality of signals to actions indicated in the finite-state machine, the controller including a plurality of light-emitting diode (LED) drivers to drive and control the lamp.
18. The system of claim 16 , wherein:
a first position of the voltage-divider mechanism and a last position of the voltage-divider mechanism are configured, respectively, to control the lamp to a subsequently higher color temperature and a subsequently lower color temperature; and
mid-range positions of the voltage-divider mechanism are configured to control the lamp to a pre-determined coordinate position selected from a value of D uv above the BBL and a value of D uv below the BBL.
19. The system of claim 16 , wherein all combinations of CCT and D uv selected result in a color-rendering index (CRI) of the lamp of about 90 or greater.
20. The system of claim 16 , wherein the correlated color temperature (CCT) and the coordinate distance (D uv ) from a black body line comprise a two-dimensional color space.