Lighting system for transparent liquid crystal display
First Claim
1. A lighting system for a transparent LCD having opposing vertical edges, the system comprising:
- a mullion lighting assembly positioned adjacent to each vertical edge of the transparent LCD, each mullion lighting assembly having sidewalls defining an enclosed center channel and;
a plurality of LEDs positioned along the sidewall of each mullion lighting assembly and on a side of the sidewall that opposes the center channel, said LEDs placed in conductive thermal communication with the sidewall;
a fan positioned to draw cooling air through the center channel; and
a dividing element positioned near a mid-point of the center channel, which divides the center channel into a first and a second portion; and
a plurality of apertures in the sidewall which allow cooling air to enter and exit the center channel;
wherein the fan is positioned to draw cooling air through the first portion and a second fan is positioned to draw cooling air through the second portion.
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Accused Products
Abstract
Exemplary embodiments provide a lighting system for a transparent LCD having opposing vertical edges, the system having a mullion lighting assembly positioned adjacent to each vertical edge of the transparent LCD, each mullion lighting assembly having sidewalls defining a center channel. A plurality of LEDs are positioned along the sidewall of each mullion assembly and on a side of the sidewall that opposes the center channel. The LEDs are preferably placed in conductive thermal communication with the sidewall. A fan is positioned to draw cooling air through the center channel. A lens may be positioned adjacent to the LEDs to collimate the light. Louvers may be used to direct the emitted light away from the LCD, so as to reflect off the goods within a display case or the cavity within the display case. Some embodiments may use a flange to direct the emitted light away from the LCD.
29 Citations
26 Claims
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1. A lighting system for a transparent LCD having opposing vertical edges, the system comprising:
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a mullion lighting assembly positioned adjacent to each vertical edge of the transparent LCD, each mullion lighting assembly having sidewalls defining an enclosed center channel and; a plurality of LEDs positioned along the sidewall of each mullion lighting assembly and on a side of the sidewall that opposes the center channel, said LEDs placed in conductive thermal communication with the sidewall; a fan positioned to draw cooling air through the center channel; and a dividing element positioned near a mid-point of the center channel, which divides the center channel into a first and a second portion; and a plurality of apertures in the sidewall which allow cooling air to enter and exit the center channel; wherein the fan is positioned to draw cooling air through the first portion and a second fan is positioned to draw cooling air through the second portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A lighting system for a first and second transparent LCD positioned side-by-side, the system comprising:
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a mullion lighting assembly positioned between the first and second LCDs and having sidewalls defining a center channel where a first portion of the sidewall is adjacent to the first LCD and a second portion of the sidewall is adjacent to the second LCD; a first plurality of LEDs positioned along the first portion of the sidewall and having a central axis that is angled away from the first LCD; a second plurality of LEDs positioned along the second portion of the sidewall and having a central axis that is angled away from the second LCD; a dividing element positioned near a mid-point of the center channel, which divides the center channel into a first and a second portion; a plurality of apertures in the sidewall which allow cooling air to enter and exit the center channel; a first fan positioned to draw cooling air through the first portion of the center channel; and a second fan positioned to draw cooling air through the second portion. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A lighting system for the door of a display case, the door having a transparent LCD positioned behind a front glass where the LCD has a pair of vertical edges, the system comprising:
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a mullion lighting assembly positioned adjacent to each vertical edge of the transparent LCD, each mullion lighting assembly having sidewalls defining an enclosed center channel; a plurality of LEDs positioned along a sidewall of each mullion lighting assembly and on a side of the sidewall that opposes the center channel, said LEDs placed in conductive thermal communication with the sidewall; a dividing element positioned near a mid-point of the center channel, which divides the center channel into a first and a second portion; a first fan positioned to draw cooling air through the first portion; a second fan positioned to draw cooling air through the second portion; a door sensor positioned to determine whether the door is open or closed; and a microprocessor in electrical communication with the LEDs, fan, and door sensor. - View Dependent Claims (23, 24, 25, 26)
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Specification