System for using constricted convection with closed loop cooling system as the convection plate

• US 9,629,287 B2
• Filed: 06/13/2016
• Issued: 04/18/2017
• Est. Priority Date: 03/03/2008
• Status: Active Grant

• Current Assignee: Manufacturing Resources International, Inc.
• Original Assignee: Manufacturing Resources International, Inc.
• Inventors: Dunn, William
• Primary Examiner(s): KIM, RICHARD H
• Application Number:
  US15/180,968
• Publication Number:
  US 20160302331A1
• Time in Patent Office: 309 Days
• Field of Search: None
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 2201/36 Airflow channels, e.g. constructional arrangements facilitating the flow of air
• CPC Class Codes: H05K 7/20127 Natural convection
• CPC Class Codes: H05K 7/20136 Forced ventilation, e.g. by fans H05K7/202 takes precedence
• CPC Class Codes: H05K 7/20145 Means for directing air flow, e.g. ducts, deflectors, plenum or guides
• CPC Class Codes: H05K 7/20163 the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
• CPC Class Codes: H05K 7/202 Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers
• CPC Class Codes: H05K 7/20209 Thermal management, e.g. fan control
• CPC Class Codes: H05K 7/20954 for display panels
• CPC Class Codes: H05K 7/20972 Forced ventilation, e.g. on heat dissipaters coupled to components

Abstract

An electronic display assembly is disclosed herein. An electronic display may be positioned within a housing where the display is cooled by a combination of airflows. A closed loop of isolated gas may be used with an open loop of ambient air which passes through the housing in order to cool the display. Preferably, the closed loop of isolated gas cools the front surface of the display while the open loop of ambient air cools the rear surface of the display. Preferably, the closed loop of isolated gas is not permitted to mix with the open loop of ambient air.

Claims

1. An electronic display assembly comprising:

an electronic display housing;

a gas-containing closed loop gas cooling chamber located within the electronic display housing;

an electronic display positioned within the electronic display housing but outside of the closed loop gas cooling chamber; and

an open loop ambient air pathway through the electronic display housing;

wherein the electronic display is coolable by a combination of gas circulation within the closed loop gas cooling chamber and ambient air flow through the open loop ambient air pathway in the electronic display housing.

2. The electronic display assembly of claim 1 wherein:

the closed loop gas cooling chamber and the open loop ambient air pathway are positioned such that gas circulation within the closed loop gas cooling chamber will cool a front surface of the electronic display while the ambient air flow will cool a rear surface of the electronic display.

3. The electronic display assembly of claim 2 wherein:

the rear surface of the electronic display comprises the rear surface of an LED backlight.

4. The electronic display assembly of claim 1 wherein:

the gas within the closed loop gas cooling chamber is isolated from the open loop of ambient air.

5. The electronic display assembly of claim 1 wherein:

the closed loop gas cooling chamber and the ambient air pathway are configured such that gas circulation within the gas cooling chamber will occur in a direction that is substantially perpendicular to the direction that ambient air will flow through the electronic display housing.

6. The electronic display assembly of claim 1 wherein:

the closed loop of gas cooling chamber forms a continuous loop and the open loop ambient air pathway passes through the loop.

7. The electronic display assembly of claim 1 wherein:

the closed loop gas cooling chamber is configured such that gas circulation therein will occur substantially horizontally, while the open loop ambient air pathway is configured such that ambient air flow through the electronic display housing will occur substantially vertically.

8. The electronic display assembly of claim 1 wherein:

the closed loop gas cooling chamber is partially defined by a sealed rear plenum that prevents ambient air from entering the plenum.

9. The electronic display assembly of claim 8 further comprising:

one or more electronic devices for operating the electronic display positioned within the sealed plenum.

10. The electronic display assembly of claim 1 wherein:

the electronic display is selected from the group consisting of a liquid crystal display, a light emitting diode display, an organic light emitting diode display, a field emitting display, a cathode ray tube display, and a plasma display.

11. The electronic display assembly of claim 1 further comprising:

a gas-circulating fan for circulating the gas within the closed loop gas cooling chamber, and a fan for producing a flow of ambient air through the open loop ambient air pathway in the electronic display housing.

12. An electronic display assembly comprising:

a housing;

a liquid crystal display (LCD) positioned within the housing and having a backlight;

wherein the electronic display is coolable by a combination of a closed loop of isolated gas which circulates within the housing and an open loop of ambient air which passes through the housing and along the backlight.

13. The electronic display assembly of claim 12 wherein:

the isolated gas will cool a front surface of the LCD.

14. The electronic display assembly of claim 12 further comprising:

a rear cooling chamber positioned behind the LCD and containing the closed loop of isolated gas; and

wherein the open loop ambient air will contact an exterior surface of the chamber, but is not permitted to enter the chamber.

15. The electronic display assembly of claim 12 further comprising:

one or more electronic components for driving the LCD positioned within the rear cooling chamber.

16. The electronic display assembly of claim 12 wherein:

the open loop of ambient air will contact an exterior surface of the rear cooling chamber while the closed loop of isolated gas will contact an interior surface of the rear cooling chamber.

17. The electronic display assembly of claim 12 wherein:

the intended direction of closed loop isolated gas flow is substantially perpendicular to the intended direction of open loop of ambient air flow.

18. An electronic display assembly comprising:

a housing;

an electronic display positioned within the housing;

a rear cooling chamber positioned behind the electronic display and containing an electrical component which is electrically connected to the electronic display;

a front surface on the electronic display which faces an intended viewer and a rear surface on the electronic display which opposes the front surface;

wherein the front surface of the electronic display is coolable by a closed loop of isolated gas and the rear surface of the electronic display is coolable by an open loop of ambient air.

19. The electronic display assembly of claim 18 wherein:

the open loop of ambient air is prohibited from mixing with the closed loop of isolated gas when it passes through the housing.

20. The electronic display assembly of claim 18 wherein:

the open loop of ambient air will pass between the rear surface of the electronic display and an exterior surface of the rear cooling chamber.

21. An electronic display assembly comprising:

an electronic display housing;

a closed loop of cooling gas adapted for circulation within the electronic display housing;

an open loop ambient air pathway through the electronic display housing; and

an electronic display positioned within the electronic display housing such that the electronic display is isolated from the closed loop of cooling gas but contactable by ambient air flowing through the open loop ambient air pathway;

wherein the electronic display is coolable by a combination of closed loop cooling gas circulation within the electronic display housing, and ambient air flow through the open loop ambient air pathway in the electronic display housing.

22. The electronic display assembly of claim 21 wherein:

the closed loop of cooling gas is isolated within a continuous loop gas cooling chamber, and the open loop ambient air pathway is configured to direct the ambient air over an exterior surface of the gas cooling chamber when it flows through the electronic display housing.

23. The electronic display assembly of claim 22 further comprising:

a fan located within the electronic display housing, the fan configured and oriented to move air located within the housing between a surface of the continuous loop gas cooling chamber and a rear surface of the electronic display.