Load control device having a visual indication of energy savings and usage information

• US 8,274,233 B2
• Filed: 12/23/2010
• Issued: 09/25/2012
• Est. Priority Date: 11/25/2008
• Status: Active Grant

• Current Assignee: Lutron Technology Company LLC
• Original Assignee: Lutron Electronics Company Incorporated (Lutron Electronics)
• Inventors: Altonen, Gregory, Jacoby, Elliot G., Salvestrini, Christopher James, Steffie, Jamie J., Spira, Joel S.
• Primary Examiner(s): Tan, Vibol
• Application Number:
  US12/977,747
• Publication Number:
  US 20110162946A1
• Time in Patent Office: 642 Days
• Field of Search: 315/209.R, 315/209.SC, 315149-158, 315/224, 315/246, 315/291, 315/294, 315/295, 315/307, 315/321, 315/129, 340/309, 340/310.14, 340/310.16, 340/825.22
• US Class Current: 315/209.R
• CPC Class Codes: H01H 13/023 Light-emitting indicators for multi-layer switches H01H13/83
• CPC Class Codes: H01H 15/025 Light-emitting indicators
• CPC Class Codes: H01H 2231/052 Selectors, e.g. dimmers
• CPC Class Codes: H01H 9/181 using a programmable display, e.g. LED or LCD
• CPC Class Codes: H05B 39/085 by touch control
• CPC Class Codes: H05B 47/10 Controlling the light source
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A dimmer switch for controlling the amount of power delivered to and thus the intensity of a lighting load comprises a visual display operable to provide a visual indication representative of energy savings and usage information. The dimmer switch comprises an intensity adjustment actuator, such as a slider knob or a rotary knob, which may be coupled to a potentiometer for adjusting the amount of power delivered to the lighting load. The potentiometer may comprise a dual potentiometer including a resistive element and a conductive element having a cut. The visual display may comprise a single visual indicator, which may be illuminated a first color, such as green, when the intensity of the lighting load is less than or equal to the eco-level intensity, and illuminated a second different color, such as red, when the intensity of the lighting load is greater than the eco-level intensity.

Claims

1. A dimmer switch for controlling the amount of power delivered from a power source to a lighting load, the dimmer switch comprising:

a controllably conductive device adapted to be coupled in series electrical connection between the source and the lighting load for controlling the intensity of the lighting load;

an intensity adjustment actuator operatively coupled to the controllably conductive device, such that the controllably conductive device is operable to adjust the intensity of the lighting load between a low-end intensity and a high-end intensity in response to actuations of the intensity adjustment actuator; and

a visual indicator operable to be illuminated a first color when the intensity of the lighting load is less than or equal to a predetermined eco-level intensity, and a second color different than the first color when the intensity of the lighting load is greater than the predetermined eco-level intensity, the predetermined eco-level intensity being greater than 75% of a maximum possible intensity of the lighting load.

2. The dimmer switch of claim 1, wherein the controllably conductive device comprises a triac, the dimmer switch further comprising:

a timing circuit coupled in parallel electrical connection with the triac, the timing circuit coupled to a gate of the triac, such that the triac is rendered conductive in response to a timing voltage generated by the timing circuit; and

a visual indicator circuit coupled in parallel electrical connection with the triac, the visual indicator circuit comprising a first light-emitting diode having the first color, and a second light-emitting diode having the second color, the first and second light-emitting diodes operable to illuminate the visual indicator the respective colors.

3. The dimmer switch of claim 2, further comprising:

a dual potentiometer comprising a single shaft and first and second potentiometer portions having respective wipers controlled together by the single shaft, the first potentiometer portion having a variable resistance and coupled to the timing circuit, such that the triac is rendered conductive in response to the variable resistance of the first potentiometer portion;

wherein the second potentiometer portion is coupled to the visual indicator circuit, such that the first light-emitting diode is illuminated when the intensity of the lighting load is less than or equal to the predetermined eco-level intensity, and the second light-emitting diode is illuminated when the intensity of the lighting load is greater than the predetermined eco-level intensity.

4. The dimmer switch of claim 3, wherein the potentiometer comprises a dual linear potentiometer.

5. The dimmer switch of claim 4, wherein the intensity adjustment actuator comprises a slider knob adapted to move linearly along the length of a slider opening, the slider knob coupled to the shaft of the linear potentiometer, such that the triac is rendered conductive in response to actuations of the slider knob.

6. The dimmer switch of claim 5, further comprising:

a mechanical switch coupled in series electrical connection with the triac, such that the lighting load is on when the mechanical switch is closed and off when the mechanical switch is open.

7. The dimmer switch of claim 6, further comprising:

a rocker switch for actuating the mechanical switch to turn the lighting load on and off.

8. The dimmer switch of claim 6, further comprising:

a toggle actuator on the slider knob for actuating the mechanical switch to turn the lighting load on and off.

9. The dimmer switch of claim 5, wherein the visual indicator is located at a position along the length of the slider opening that is representative of the value of the predetermined eco-level intensity.

10. The dimmer switch of claim 5, wherein the visual indicator is located in the slider knob.

11. The dimmer switch of claim 5, wherein the dimmer switch comprises a tabletop dimmer switch.

12. The dimmer switch of claim 3, wherein the dual potentiometer comprises a dual rotary potentiometer.

13. The dimmer switch of claim 12, wherein the intensity adjustment actuator comprises a rotary knob adapted to be rotated, the rotary knob coupled to the shaft of the rotary potentiometer, such that the triac is rendered conductive in response to actuations of the rotary knob.

14. The dimmer switch of claim 13, wherein the rotary potentiometer comprises a mechanical switch coupled in series electrical connection with the controllably conductive device, such that the lighting load is on when the mechanical switch is closed and off when the mechanical switch is open, the mechanical switch operable to be opened and closed in response to actuations of the rotary knob to push the knob in towards the dimmer switch.

15. A dimmer switch for controlling the amount of power delivered from a power source to a lighting load, the dimmer switch comprising:

a controllably conductive device adapted to be coupled in series electrical connection between the source and the lighting load for controlling the intensity of the lighting load;

an intensity adjustment actuator operatively coupled to the controllably conductive device, such that the controllably conductive device is operable to adjust the intensity of the lighting load between a low-end intensity and a high-end intensity in response to actuations of the intensity adjustment actuator; and

a visual indicator operable to be illuminated a first color when the intensity of the lighting load is less than or equal to a predetermined lower eco-level intensity, and a second color different than the first color when the intensity of the lighting load is greater than a predetermined upper eco-level intensity, the lower and upper eco-level intensities being greater than 75% of a maximum possible intensity of the lighting load.

16. The dimmer switch of claim 15, wherein the visual indicator is illuminated a third color when the intensity of the lighting load is between the upper and lower eco-level intensities, the third color being different than the first and second colors.

17. The dimmer switch of claim 16, further comprising:

a visual indicator circuit coupled in parallel electrical connection with the controllably conductive device, the visual indicator circuit comprising a first light-emitting diode having the first color, and a second light-emitting diode having the second color, the first and second light-emitting diodes operable to illuminate the visual indicator the respective colors.

18. The dimmer switch of claim 17, wherein both of the light-emitting diodes are illuminated at the same time to illuminate the visual indicator the third color when the intensity of the lighting load is between the upper and lower eco-level intensities.

19. The dimmer switch of claim 18, wherein the controllably conductive device comprises a triac, the dimmer switch further comprising:

a timing circuit coupled in parallel electrical connection with the triac, the timing circuit coupled to a gate of the triac, such that the triac is rendered conductive in response to a timing voltage generated by the timing circuit;

a dual potentiometer comprising a single shaft and first and second potentiometer portions having respective wipers controlled together by the single shaft, the first potentiometer portion having a variable resistance and coupled to the timing circuit, such that the triac is rendered conductive in response to the variable resistance of the first potentiometer portion;

wherein the second potentiometer portion is coupled to the visual indicator circuit and comprises a cut, such that only the first light-emitting diode is illuminated when the intensity of the lighting load is less than or equal to the lower eco-level intensity, only the second light-emitting diode is illuminated when the intensity of the lighting load is greater than the upper eco-level intensity, and both of the light-emitting diodes are illuminated at the same time to illuminate the visual indicator the third color when the intensity of the lighting load is between the upper and lower eco-level intensities.

20. The dimmer switch of claim 16, wherein the first color is green, the second color is red, and the third color is yellow.

21. The dimmer switch of claim 15, wherein the lower eco-level intensity is equal to the upper eco-level intensity, such that the visual indicator is illuminated the first color when the intensity of the lighting load is less than or equal to the lower eco-level intensity, and the second color when the intensity of the lighting load is greater than the lower eco-level intensity.