# US 2021/0243914 A1 · Electronic display with cooling

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- Number: US 2021/0243914 A1
- Document ID: US20210243914A1
- Status: Published application
- Kind: A1
- Application number: 17/234,237
- Filed: 2021-04-19
- Published: 2021-08-05
- Earliest claimed: 2008-03-03
- Assignees: Manufacturing Resources International, Inc.
- Applicants: Manufacturing Resources International, Inc.
- Inventors: William Dunn; Tim Hubbard
- Web page: https://patentgrep.com/patent/US20210243914A1

## CPC

- H05K 7/202: {Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers}
- G02F 1/133385: {with cooling means, e.g. fans}
- H05K 7/20136: {Forced ventilation, e.g. by fans (H05K7/202 takes precedence)}
- H05K 7/20163: {the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels}
- H05K 7/20972: {Forced ventilation, e.g. on heat dissipaters coupled to components}
- F28D 9/00: Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall {(F28F3/083, F28F3/086 take precedence)}
- F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A display assembly includes a housing which at least partially encloses an image assembly. A cover positioned forward of, and spaced apart from, the image assembly forms at least a portion of a forward surface of the housing and permits viewing of images displayed at the image assembly therethrough. A fan assembly moves air through an airflow pathway within the housing which includes a front channel between the cover and the image assembly and a rear chamber behind the image assembly. One or more solar energy reduction layers are associated with the cover and prevent at least some ambient sunlight striking the cover from traveling therebeyond.

## Claims

### Claim 1

A display assembly for reducing solar load from ambient sunlight, said display assembly comprising:
an image assembly for displaying images;
a housing at least partially enclosing said image assembly;
a cover positioned forward of, and spaced apart from, said image assembly, wherein said cover forms at least a portion of a forward surface of said housing and is configured to permit viewing of said images displayed at said image assembly through said cover;
an airflow pathway within said housing comprising:
a front channel between said cover and said image assembly; and
a rear chamber behind said image assembly;
a fan assembly configured to move air through said airflow pathway when operated; and
one or more solar energy reduction layers associated with said cover and configured to prevent at least some of said ambient sunlight striking said cover from traveling beyond said one or more solar energy reduction layers.

### Claim 2 (depends on 1)

The display assembly of claim 1 wherein:
said airflow pathway forms a continuous, closed loop airflow pathway within said housing.

### Claim 3 (depends on 2)

The display assembly of claim 2 further comprising:
an inlet at a first area of said housing;
an exhaust at a second area of said housing; and
an open loop airflow pathway extending within said housing between said inlet and said exhaust and behind said image assembly.

### Claim 4 (depends on 3)

The display assembly of claim 3 further comprising:
a second fan assembly configured to move ambient air through said open loop airflow pathway when operated.

### Claim 5 (depends on 4)

The display assembly of claim 4 further comprising:
a heat exchanger located rearward of said image assembly, wherein said airflow pathway comprises a first portion of said heat exchanger, and wherein said open loop airflow pathway comprises a second portion of said heat exchanger.

### Claim 6 (depends on 5)

The display assembly of claim 5 wherein:
said heat exchanger comprises multiple layers;
a first number of said multiple layers form part of said first portion of said heat exchanger;
a second number of said multiple layers form part of said second portion of said heat exchanger; and
said first and second number of said multiple layers are provided on an alternating basis in a stacked arrangement.

### Claim 7 (depends on 1)

The display assembly of claim 1 wherein:
at least one of said one or more solar energy reduction layers comprises an anti-reflection film.

### Claim 8 (depends on 1)

The display assembly of claim 1 wherein:
at least one of said one or more solar energy reduction layers comprises a polarizer.

### Claim 9 (depends on 8)

The display assembly of claim 8 wherein:
said polarizer is a linear polarizer.

### Claim 10 (depends on 1)

The display assembly of claim 1 wherein:
at least one of said one or more solar energy reduction layers is provided at a rear surface of said cover.

### Claim 11 (depends on 1)

The display assembly of claim 1 wherein:
said one or more solar energy reduction layers comprises a first layer comprising a first polarizer and a second layer comprising a second polarizer.

### Claim 12 (depends on 1)

The display assembly of claim 1 wherein:
said one or more solar energy reduction layers comprises a first layer comprising a polarizer and a second layer comprising an anti-reflective film.

### Claim 13 (depends on 1)

The display assembly of claim 1 wherein:
said cover comprises multiple layers.

### Claim 14 (depends on 13)

The display assembly of claim 13 further comprising:
an optical adhesive interposed between said multiple layers of said cover.

### Claim 15 (depends on 14)

The display assembly of claim 14 wherein:
each of said multiple layers of said cover comprise glass or a polymer.

### Claim 16 (depends on 1)

The display assembly of claim 1 wherein:
said image assembly comprises a liquid crystal display stack and a backlight.

### Claim 17 (depends on 16)

The display assembly of claim 16 wherein:
said backlight comprises a number of light emitting diodes mounted to a substrate located rearward of said liquid crystal display stack to provide direct backlighting to said liquid crystal display stack when powered.

### Claim 18 (depends on 1)

The display assembly of claim 1 further comprising:
one or more electronic components for operating said image assembly located within said rear chamber.

### Claim 19

A method for reducing solar loading of a display assembly, said method comprising the steps of:
providing said display assembly comprising:
an image assembly;
a housing at least partially enclosing said image assembly;
a cover located forward of, and spaced apart from, said image assembly and forming at least a portion of a forward surface of said housing;
an airflow pathway within said housing comprising:
a front channel between said cover and said image assembly; and
a rear chamber behind said image assembly;
a fan assembly; and
one or more solar energy reduction layers associated with said cover;
installing said display assembly in an outdoor environment;
displaying images at said image assembly such that said images are visible through said cover;
operating said fan assembly to move air through said airflow pathway; and
preventing, by way of said one or more solar energy reduction layers, at least some ambient sunlight striking said cover from traveling beyond said one or more solar energy reduction layers and thermally interacting with said air in said front channel and striking said image assembly, thereby reducing the solar load.

### Claim 20

A display assembly for reducing solar load from ambient sunlight, said display assembly comprising:
an image assembly comprising:
a liquid crystal display stack; and
a backlight;
a housing at least partially enclosing said image assembly;
a cover assembly located forward of, and spaced apart from, said image assembly and forming at least a portion of a forward surface of said housing, wherein said cover assembly comprises multiple layers, and wherein said cover assembly is configured to permit viewing of said images displayed at said image assembly through said cover assembly;
a front channel located between a rear surface of said cover assembly and a forward surface of said image assembly;
a heat exchanger located behind said image assembly;
a closed loop airflow pathway comprising said front channel and a first portion of said heat exchanger;
an inlet located at a first area of said housing;
an exhaust located at a second area of said housing;
an open loop airflow pathway extending within said housing between said inlet and said exhaust and through a second portion of said heat exchanger;
a first fan assembly configured to move circulating gas through said closed loop airflow pathway when operated;
a second fan assembly configured to move ambient air through said open loop airflow pathway when operated; and
wherein at least one of said multiple layers of said cover assembly comprises a polarizer.

### Claim 21

A display assembly for reducing solar load from ambient sunlight, said display assembly comprising:
an image assembly for displaying images;
a housing at least partially enclosing said image assembly;
a cover assembly located forward of, and spaced apart from, a front surface of said image assembly, said cover assembly comprising:
a protective front panel;
a first polarizer provided along an interior surface of said protective front panel;
a second polarizer provided along an interior surface of said first polarizer; and
a third polarizer provided along an interior surface of said second polarizer;
wherein said cover assembly is configured to permit viewing of said images displayed at said image assembly through said cover assembly;
a front channel between an interior surface of said cover assembly and a forward surface of said image assembly;
a heat exchanger located behind said image assembly;
a closed loop airflow pathway comprising said front channel and a first portion of said heat exchanger;
an inlet located at a first area of said housing;
an exhaust located at a second area of said housing;
an open loop airflow pathway extending within said housing between said inlet and said exhaust and through a second portion of said heat exchanger;
a first fan assembly configured to move circulating gas through said closed loop airflow pathway when operated; and
a second fan assembly configured to move ambient air through said open loop airflow pathway when operated.

### Claim 22 (depends on 21)

The display assembly of claim 21 wherein:
said first polarizer comprises a quarter-wave polarizer;
said second polarizer comprises a linear polarizer; and
said third polarizer comprises another quarter-wave polarizer.

### Claim 23 (depends on 21)

The display assembly of claim 21 wherein:
said image assembly comprises at least one layer of liquid crystals and a backlight.