System for Decreasing Energy Usage of a Transparent LCD Display Case

• US 20160192451A1
• Filed: 10/09/2015
• Published: 06/30/2016
• Est. Priority Date: 10/09/2014
• Status: Active Grant

• Current Assignee: Manufacturing Resources International, Inc.
• Original Assignee: Manufacturing Resources International, Inc.
• Inventors: Dunn, William, De Laet, Rick
• Granted Patent: US 9,832,847 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H05B 47/105 in response to determined parameters
• CPC Class Codes: H05B 47/16 by timing means
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

An apparatus for controlling a backlight is disclosed. The apparatus includes a housing and door. A transparent liquid crystal display and associated backlight is positioned between front and rear glass panels of said door. A door sensor is positioned to detect if the door is open or shut, and a controller connected to the backlight and door sensor measures the amount of time that has passed between door openings and drives the backlight at various levels based upon the elapsed time.

Claims

1. An apparatus for controlling a backlight comprising:

a display case comprising a housing and a door, the door comprising front and rear glass panels;

a transparent liquid crystal display and associated backlight positioned between the front and rear glass panels;

a door sensor positioned to determine whether the door is open or closed; and

a controller electrically connected to the backlight and door sensor, where the controller measures the amount of time that has passed between door openings and drives the backlight at various levels based upon time between openings.

2. The apparatus of claim 1 further comprising:

a modem electrically connected with said controller configured to receive backlight power reduction data for the backlight and transmit said backlight power reduction data to the controller.

3. The apparatus of claim 2 further comprising:

a media player electrically connected with the controller and configured to transmit content data to the liquid crystal display.

4. The apparatus of claim 3 further comprising:

a temperature controller electrically connected to the controller.

5. The apparatus of claim 1 wherein the backlight comprises:

a series of light emitting diodes located along an upper and lower edge of the liquid crystal display.

6. The apparatus of claim 5 wherein:

the controller comprises a nexus board.

7. The apparatus of claim 6 wherein:

the controller drives the backlight at normal operational power unless and until the amount of time that has passed between door openings and closing, as detected by the door sensor, reaches a predetermined threshold, then the controller drives the backlight at a reduced operational power according to the backlight power reduction data.

8. The apparatus of claim 7 wherein:

the controller drives the backlight at a second reduced operational power according to the backlight power reduction data if the amount of time that has passed between door openings and closings, as detected by the door sensor, reaches a second predetermined threshold.

9. A method for controlling a backlight of a transparent liquid crystal display housed within a door of a display case and electrically connected to a controller comprising the steps of:

determining if the door is closed;

calculating the time elapsed since the door was closed; and

operating the backlight at a predetermined power level according to the time elapsed.

10. The method of claim 9 further comprising the step of:

accepting data at the controller by way of a modem for operation of the backlight.

11. The method of claim 10 wherein:

the data comprises a first predetermined percentage of reduction level, a second predetermined percentage of reduction level, a first period of elapsed time, and a second period of elapsed time.

12. The method of claim 9 wherein:

the backlight is driven at zero percent reduction in power when the door is opened.

13. The method of claim 11 wherein:

the backlight power is reduced by the first predetermined percentage of reduction level if the first period of elapsed time is reached.

14. The method of claim 11 wherein:

the backlight power is reduced by the second predetermined percentage of reduction level if the second period of elapsed time is reached.

15. The method of claim 11 wherein:

the second predetermined percentage is greater than the first predetermined percentage; and

the second period of elapsed time is greater than the first period of elapsed time.

16. The method of claim 11 wherein:

the data is provided by a remote user through the modem.

17. A method for controlling a backlight of a liquid crystal display (LCD) located in a door of a display case and electrically connected with a modem comprising the steps of:

accepting backlight data from the modem, said backlight data comprising a first reduced backlight level corresponding with a first time threshold, a second reduced backlight level corresponding with a second time threshold;

operating the backlight at normal operation power level;

recording the elapsed time following a closing of the door and driving the backlight at normal operation power level;

operating the backlight at the first reduced backlight level if the elapsed time reaches a first time threshold; and

operating the backlight at the second reduced backlight level if the elapsed time reaches a second time threshold

18. The method of claim 17 wherein:

the backlight is operated at the normal operation power level when the door is opened.

19. The method of claim 18 wherein:

the backlight is operated at the normal operation power level when the elapsed time has not reached the first predetermined time threshold.

20. The method of claim 17 wherein:

the first reduced backlight level is a higher luminance than the second reduced backlight level.