Thermal plate with optional cooling loop in electronic display

• US 8,497,972 B2
• Filed: 12/03/2009
• Issued: 07/30/2013
• Est. Priority Date: 11/13/2009
• Status: Active Grant

• Current Assignee: Manufacturing Resources International, Inc.
• Original Assignee: Manufacturing Resources International, Inc.
• Inventors: Dunn, William, Le, Don, Bedell, Ware
• Primary Examiner(s): NGO, HUYEN LE
• Application Number:
  US12/630,469
• Publication Number:
  US 20110116000A1
• Time in Patent Office: 1,335 Days
• Field of Search: 349/161, 361/679, 361/695, 454/184
• US Class Current: 349/161
• CPC Class Codes: F28F 3/00 Plate-like or laminated elements; Assemblies of plate-like or laminated elements specially adapted for movement F28F5/00
• CPC Class Codes: G02F 1/133342 for double-sided displays
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans
• 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 7/20154 Heat dissipaters coupled to components
• CPC Class Codes: H05K 7/20963 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20972 takes precedence
• CPC Class Codes: H05K 7/20972 Forced ventilation, e.g. on heat dissipaters coupled to components

Abstract

An electronic display having one or more thermal plates in thermal communication with an image assembly and a thermally-conductive housing (and optional door frame). In some embodiments, the thermal plate is in thermal communication with the door frame which is in thermal communication with the housing. A channel may be defined between a transparent plate assembly and the image assembly where a fan may force cooling air through the channel. The cooling air may also pass through apertures in the thermal plate(s). An exemplary image assembly may provide an LED edge-lit LCD or an OLED display. In some embodiments, two displays may be provided in a back-to-back orientation within a single housing. The display may dissipate heat without the need to ingest ambient air.

Claims

1. A thermally-controlled electronic display comprising:

a thermally-conductive housing;

an image assembly within the housing;

a thermal plate in thermal communication with the image assembly and the housing; and

a transparent plate assembly within the housing and placed in front of the image assembly.

2. The electronic display of claim 1 wherein:

the image assembly is an LED edge-lit LCD and the LEDs are in thermal communication with the thermal plate.

3. The electronic display of claim 1 further comprising:

a channel between the transparent plate assembly and the image assembly; and

a fan which draws air through the channel.

4. The electronic display of claim 1 further comprising:

apertures in the thermal plate which allow air to pass through the plate;

a channel between the transparent plate assembly and the image assembly;

a separating plate which divides the interior of the housing into upper and lower portions; and

a fan mounted on the separating plate which draws air through the channel and the apertures in the thermal plate.

5. The electronic display of claim 1 wherein:

wherein the housing and transparent plate assembly provide an enclosure which provides a gaseous seal between the interior of the display and the surrounding ambient air.

6. A thermally-controlled electronic display comprising:

a thermally-conductive housing;

an image assembly within the housing and having a front surface;

a thermal plate in thermal communication with the image assembly;

a thermally-conductive door frame in thermal communication with the thermal plate;

a transparent plate assembly within the door frame and having a rear surface; and

a channel defined by the rear surface of the transparent plate assembly and the front surface of the image assembly; and

a fan which forces air through the channel.

7. The electronic display of claim 6 wherein:

the door frame and housing are in thermal communication with one-another.

8. The electronic display of claim 6 wherein:

the image assembly is an LED edge-lit LCD and the LEDs are in thermal communication with the thermal plate.

9. The electronic display of claim 8 wherein:

the thermal plate is metallic and has an L-shaped cross section having two portions where the first portion is in thermal communication with the LEDs and the second portion is in thermal communication with the door frame.

10. The electronic display of claim 6 further comprising:

apertures in the thermal plate which allow air to pass through the plate;

a separating plate which divides the interior of the housing into upper and lower portions; and

wherein the fan is mounted on the separating plate and draws air through the channel and the apertures in the thermal plate.

11. The electronic display of claim 10 further comprising:

a further image assembly within the housing and having a front surface;

a further thermal plate in thermal communication with the further image assembly and having a plurality of apertures;

a further thermally-conductive door frame in thermal communication with the further thermal plate;

a further transparent plate assembly within the further door frame and having a rear surface; and

a further channel defined by the rear surface of the further transparent plate assembly and the front surface of the further image assembly;

wherein the fan also forces air through the further channel and through the apertures of the further thermal plate.

12. The electronic display of claim 11 wherein:

the door frame, further door frame, and housing are in thermal communication with one-another.

13. The electronic display of claim 6 wherein:

the thermal plate has an L-shaped cross section having a first and second portion, each portion having a distal and proximal end where the proximal ends are joined to form the L shape.

14. The electronic display of claim 6 wherein:

the image assembly is an OLED assembly.

15. The electronic display of claim 6 further comprising:

a linear polarizer attached to the rear surface of the transparent plate assembly.

16. The electronic display of claim 6 further comprising:

a thermoelectric module within the housing.

17. The electronic display of claim 6 wherein:

the transparent plate assembly comprises two sheets of glass laminated together with optical adhesive.

18. A thermally-controlled electronic display:

a thermally-conductive housing;

an LCD assembly within the housing, the LCD assembly having a front surface and a backlight containing a plurality of LEDs along first and second opposing edges of the backlight;

a first thermal plate having two portions in thermal communication with one another, the first portion being in thermal communication with the LEDs along the first edge and the second portion being in thermal communication with the housing;

a second thermal plate having two portions in thermal communication with one another, the first portion being in thermal communication with the LEDs along the second edge and the second portion being in thermal communication with the housing;

a transparent plate assembly within the housing and having a rear surface;

a channel defined by the rear surface of the transparent plate assembly and the front surface of the LCD; and

a fan which forces air through the channel and over the thermal plates.

19. The electronic display of claim 18 further comprising:

apertures in the thermal plates which allow air to pass through the plate; and

wherein the fan is draws air through the channel and the apertures in the thermal plates.

20. The electronic display of claim 19 further comprising:

a separating plate which divides the interior of the housing into upper and lower portions; and

wherein the fan is mounted on the separating plate.