System for using constricted convection with closed loop plenum as the convection plate
View Patent ↗A cooling system and a method for cooling an electronic display. A preferred embodiment utilizes a closed loop cooling system in a constricted convection cooling setup to remove heat from the backlight of a display assembly. Cooling air can be pulled or pushed through a gap between the display (or backlight) and a rear cooling chamber. The resulting warm air can then be exhausted out of the display housing. The cooling air may be air conditioned or may be exposed to a thermoelectric device. A thermostat may be used so that cooling fans are only energized when the temperature reaches a predetermined point.
1. A system for cooling a display comprising:
a closed-loop cooling system surrounding the display, the cooling system having a rear cooling chamber placed posterior to the display, the space between the rear cooling chamber and the display defining a gap; and
a fan positioned to create a flow of ambient air through the gap.
2. The system from claim 1 further comprising:
a metallic layer bonded to the posterior surface of the display.
3. The system from claim 1 wherein:
the fan is mounted above the gap and adapted to draw cooling air through the gap.
4. The system of claim 3 further comprising:
a temperature sensor mounted near the display;
a switch in electrical communication with said temperature sensor and the fan; and
wherein the switch allows the fan to energize when a threshold temperature is reached.
5. The system from claim 1 wherein:
the fan is mounted below the gap and adapted to push cooling air through the gap.
6. The system of claim 1 wherein:
said display is an LED-backlit LCD.
7. The system of claim 1 wherein:
said gap is between one-third inch and three inches wide.
8. The system of claim 1 further comprising:
a further fan placed below the rear cooling chamber and adapted to draw in ambient air; and
an air directing device placed between the rear cooling chamber and the further fan.
9. The system of claim 1 wherein:
the display is an OLED display.
10. A display assembly comprising:
an electronic display;
a closed-loop cooling system surrounding the display, the cooling system having a rear cooling chamber placed near the display posterior, the space between the rear cooling chamber and the display defining a gap;
a first fan below the rear cooling chamber and adapted to ingest ambient air; and
a second fan adapted to force air through the gap.
11. The system of claim 10 wherein:
the electronic display is an LCD display with an LED backlight.
12. The system of claim 11 further comprising:
a metallic surface attached to the posterior of the LED backlight where the metallic surface faces the gap.
13. The system of claim 11 further comprising:
a temperature sensor mounted near the LED backlight;
a microcontroller in electrical communication with said temperature sensor and the second fan; and
wherein the microcontroller directs the second fan to energize when a threshold temperature is reached.
14. The system of claim 10 further comprising:
a directing device between the first fan and the gap.
15. The system of claim 10 wherein:
the gap is between one-third inch and three inches wide.
16. The system of claim 10 wherein:
said electronic display is an OLED display.
17. A display assembly comprising:
a housing;
an LCD stack within the housing;
an LED backlight placed behind the LED stack and having a posterior surface;
a closed-loop cooling system surrounding the LCD stack and LED backlight, the cooling system having a rear cooling chamber placed near the posterior surface of the LED backlight, the space between the rear cooling chamber and the posterior surface of the LED backlight defining a gap;
a first fan below the rear cooling chamber and adapted to ingest ambient air into the housing;
a second fan adapted to force air through the gap; and
an exhaust aperture adapted to exhaust air that has passed through the gap.
18. The system of claim 17 wherein:
the gap is between one-third inch and three inches wide.
19. The system of claim 17 wherein:
the LED backlight comprises a metal core printed circuit board and the posterior surface is metallic.
20. The system of claim 17 further comprising:
a temperature sensor mounted near the LED backlight;
a microcontroller in electrical communication with said temperature sensor and the second fan; and
wherein the microcontroller directs the second fan to energize when a threshold temperature is reached.