Modular display panel

• US 10,373,535 B2
• Filed: 01/26/2018
• Issued: 08/06/2019
• Est. Priority Date: 12/31/2013
• Status: Active Grant

• Current Assignee: Ultravision Technologies, LLC (Ultravision International Inc.)
• Original Assignee: Ultravision Technologies, LLC (Ultravision International Inc.)
• Inventors: Hall, William Y.
• Primary Examiner(s): Junge, Kristina N
• Application Number:
  US15/881,524
• Publication Number:
  US 20180151096A1
• Time in Patent Office: 557 Days
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 23/023 Power supplies in a casing F21V23/003 takes precedence
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G06F 1/1601 Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64
• CPC Class Codes: G06F 1/182 with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]
• CPC Class Codes: G06F 1/183 Internal mounting support structures, e.g. for printed circuit boards, internal connecting means for buses G06F13/409
• CPC Class Codes: G06F 1/188 Mounting of power supply units
• CPC Class Codes: G06F 1/189 Power distribution
• CPC Class Codes: G06F 1/20 Cooling means
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 3/1423 controlling a plurality of local displays, e.g. CRT and flat panel display
• CPC Class Codes: G06F 3/1446 display composed of modules, e.g. video walls
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G06T 1/60 Memory management
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 2013/222 with LEDs
• CPC Class Codes: G09F 9/3023 Segmented electronic displays
• CPC Class Codes: G09G 2300/026 Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
• CPC Class Codes: G09G 2300/04 : Structural and physical details of display devices
• CPC Class Codes: G09G 2320/029 : by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
• CPC Class Codes: G09G 2330/02 : Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/045 : Protection against panel overheating
• CPC Class Codes: G09G 2330/10 : Dealing with defective pixels
• CPC Class Codes: G09G 2360/04 : Display device controller operating with a plurality of display units
• CPC Class Codes: G09G 3/006 : Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/32 : semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 5/003 : Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/14 : Display of multiple viewports
• CPC Class Codes: H01B 11/02 : Cables with twisted pairs or quads
• CPC Class Codes: H01B 7/2825 : using a water impermeable sheath
• CPC Class Codes: H01B 9/003 : including electrical control or communication wires
• CPC Class Codes: H04N 7/00 : Television systems details H04N3/00, H04N5/00; methods or arrangements, for coding, decoding, compressing or decompressing digital video signals H04N19/00; selective content distribution H04N21/00
• CPC Class Codes: H05K 1/181 : associated with surface mounted components
• CPC Class Codes: H05K 2201/066 : Heatsink mounted on the surface of the PCB heatsink inserted in the PCB H05K2201/10416
• CPC Class Codes: H05K 2201/10106 : Light emitting diode [LED]
• CPC Class Codes: H05K 2201/10128 : Display
• CPC Class Codes: H05K 2201/1028 : Thin metal strips as connectors or conductors
• CPC Class Codes: H05K 3/32 : electrically connecting electric components or wires to printed circuits
• CPC Class Codes: H05K 5/0017 : with operator interface units
• CPC Class Codes: H05K 5/0247 : Electrical details of casings, e.g. terminals, passages for cables or wiring
• CPC Class Codes: H05K 5/0256 : of interchangeable modules or receptacles therefor, e.g. cartridge mechanisms
• CPC Class Codes: H05K 5/03 : Covers
• CPC Class Codes: H05K 5/06 : Hermetically-sealed casings specially adapted for small components H05K5/0095
• CPC Class Codes: H05K 7/1422 : Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
• CPC Class Codes: H05K 7/1427 : Housings
• CPC Class Codes: H05K 7/20 : Modifications to facilitate cooling, ventilating, or heating
• 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 7/2039 : characterised by the heat transfer by conduction from the heat generating element to a dissipating body arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00
• CPC Class Codes: H05K 7/20954 : for display panels
• 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 999/99 : dummy group
• CPC Class Codes: Y02P 70/50 : Manufacturing or production processes characterised by the final manufactured product

Abstract

A modular light emitting diode (LED) display sub-assembly includes a frame and a plurality of LED display panels. The plurality of LED display panels are attached to the frame. Each of the plurality of LED display panels includes a housing, a printed circuit board attached to the housing, and a plurality of LEDs. The housing includes plastic sidewalls and an outer surface of the modular LED display sub-assembly. The plurality of LEDs are attached to a front side of the printed circuit board. The modular LED sub-assembly further includes a data receiver box mounted directly to the frame. The data receiver box includes a power management unit and a signal processing unit. Each of the LED display panels and the data receiver box are sealed to be waterproof and are configured to be exposed to an external environment without a protective cabinet.

Claims

1. A modular light emitting diode (LED) display sub-assembly comprising:

a first side and an opposite second side, wherein the first side of the modular LED display sub-assembly comprises a display surface of the modular LED display sub-assembly;

a frame comprising a top horizontal member, a bottom horizontal member, a left vertical member, and a right vertical member;

a plurality of LED display panels attached to the frame, wherein each of the plurality of LED display panels comprises

a casing comprising an outer surface of the modular LED display sub-assembly, the outer surface being part of the opposite second side of the modular LED display sub-assembly, wherein the casing further comprises plastic sidewalls,

a printed circuit board attached to the casing, the printed circuit board comprising a front side and an opposite back side;

an air gap disposed between the opposite back side of the printed circuit board and the casing, and

a plurality of LEDs arranged as pixels and attached to the front side of the printed circuit board, wherein the pixels are arranged in a rectangular array comprising at least fifty pixels;

a data receiver box mounted directly to the frame, the data receiver box comprising

a power management unit comprising an alternating current/direct current (AC/DC) converter, the power management unit configured to receive AC power and output DC power to the plurality of LED display panels, and

a signal processing unit configured to receive media packets and distribute the media packets to the plurality of LED display panels;

wherein the casing of each of the plurality of LED panels is directly coupled to the frame;

wherein each of the LED display panels and the data receiver box are sealed to be waterproof; and

wherein each of the LED display panels and the data receiver box are configured to be exposed to an external environment without a protective waterproof enclosure.

2. The modular LED display sub-assembly of claim 1, further comprising a plurality of flexible cables, wherein each of the flexible cables comprises:

a first end configured to receive media packets distributed by the signal processing unit and DC power output by the power management unit; and

a second end directly coupled to one of the LED display panels of the modular LED display sub-assembly.

3. The modular LED display sub-assembly of claim 1, wherein each of the LED display panels further comprises an integrated data and power connector configured to receive media packets distributed by the signal processing unit and DC power output by the power management unit, wherein the integrated data and power connector has a substantially circular cross-section.

4. The modular LED display sub-assembly of claim 1, wherein each of the LED display panels further comprises a scan controller attached to the printed circuit board, wherein the scan controller is configured to determine individual parameters of the plurality of LEDs in order to display an image.

5. The modular LED display sub-assembly of claim 1, wherein each of the LED display panels further comprises:

a height extending from a first edge of the LED display panel to an opposite second edge of the LED display panel;

a width extending from a third edge of the LED display panel to an opposite fourth edge of the LED display panel;

wherein the plurality of LEDs is arranged in an array comprising a pitch;

wherein the printed circuit board extends to within an edge distance of each of the first edge, the opposite second edge, the third edge, and the opposite fourth edge; and

wherein the pitch is greater than the edge distance.

6. The modular LED display sub-assembly of claim 1, wherein each of the LEDs of each of the LED display panels comprise a surface that is exposed to an external environment.

7. The modular LED display sub-assembly of claim 1, wherein the each of the LED display panels and data receiver box is configured to be cooled passively without fans.

8. The modular LED display sub-assembly of claim 1, wherein the modular LED display sub-assembly is configured to be operational when submerged in water up to a depth of one meter.

9. The modular LED display sub-assembly of claim 1, wherein the modular LED display sub-assembly is configured to be operational when submerged in water to a depth greater than one meter.

10. The modular LED display sub-assembly of claim 1, wherein each of the plurality of LED display panels further comprises an integrated data and power connector comprising:

data connectors surrounded by an end enclosure, each of the data connectors configured to fit into an opposite type of data connectors of another integrated data and power connector, wherein the data connectors are configured to carry data for controlling the plurality of LEDs;

power connectors surrounded by the end enclosure, each of the power connectors configured to fit into an opposite type of power connectors of the another integrated data and power connector, wherein the power connectors are configured to carry power to the plurality of LEDs; and

a sealing cover configured to prevent moisture from reaching inside the integrated data and power connector.

11. A modular light emitting diode (LED) display panel comprising:

a printed circuit board;

a plurality of LEDs arranged as pixels and attached to a front side of the printed circuit board, wherein the pixels are arranged in a rectangular array comprising at least fifty pixels;

a framework of louvers disposed over the front side of the printed circuit board between rows of the LEDs, wherein the framework of louvers comprises a front outer surface of the modular LED display panel;

a plastic casing comprising a back outer surface of the modular LED display panel;

circuitry for controlling the plurality of LEDs, the circuitry being disposed in a recess of the plastic casing and attached to a back side of the printed circuit board, wherein the front side is opposite the back side;

a power supply for powering the LEDs, the power supply being mounted on the back outer surface of the plastic casing, wherein the power supply comprises an alternating current/direct current (AC/DC) converter;

wherein the modular LED display panel is sealed to be waterproof;

wherein the modular LED display panel is configured to be exposed to an external environment without a protective waterproof enclosure;

wherein the modular LED display panel is configured to be cooled passively without fans; and

wherein the modular LED display panel is configured to be modularly assembled as part of a larger display.

12. The modular LED display panel of claim 11, further comprising:

a height extending from a first edge of the modular LED display panel to an opposite second edge of the modular LED display panel;

a width extending from a third edge of the modular LED display panel to an opposite fourth edge of the modular LED display panel; and

wherein the printed circuit board extends to each of the first edge, the opposite second edge, the third edge, and the opposite fourth edge.

13. The modular LED display panel of claim 11, further comprising:

a network of support structures extending into the recess from the plastic casing towards the printed circuit board, wherein the printed circuit board is attached to the plastic casing by the network of support structures.

14. The modular LED display panel of claim 11, wherein each of the plurality of LEDs comprises a surface that is exposed to an external environment.

15. The modular LED display panel of claim 11, further comprising a sealing compound disposed over the front side of the printed circuit board, wherein the front side of the printed circuit board is sealed to be waterproof by the sealing compound so that the modular LED display panel is sealed to be waterproof.

16. The modular LED display panel of claim 11, further comprising an integrated power and data cable extending through the plastic casing, the integrated power and data cable being coupled to the circuitry and the power supply.

17. The modular LED display panel of claim 11, wherein the circuitry comprises a scan controller configured to determine individual parameters of the plurality of LEDs in order to display an image.

18. The modular LED display panel of claim 11, wherein the modular LED display panel is configured to be cooled passively without fans.

19. The modular LED display panel of claim 11, wherein the modular LED display panel is configured to be operational when submerged in water up to a depth of one meter.

20. The modular LED display panel of claim 11, wherein the modular LED display panel is configured to be operational when submerged in water to a depth greater than one meter.

21. A modular light emitting diode (LED) display panel comprising:

a first side and an opposite second side, wherein the first side of the modular LED display panel comprises a display surface of the modular LED display panel;

coupling structures for use in attachment as part of a multi-panel modular display, the coupling structures being disposed on the opposite second side of the modular display panel;

a printed circuit board comprising a front side and an opposite back side;

a plurality of LEDs arranged as pixels and attached to the front side of the printed circuit board, wherein the pixels are arranged in a rectangular array comprising at least fifty pixels;

a casing disposed over the opposite back side of the printed circuit board, wherein the casing comprises plastic sidewalls and an outer surface of the modular display panel, the outer surface being part of the opposite second side of the modular display panel;

an air gap disposed in a recess of the casing between the opposite back side of the printed circuit board and the casing;

a circuit for controlling the plurality of LEDs, the circuit being attached to the printed circuit board and disposed in the recess of the casing;

a power supply for powering the plurality of LEDs, the power supply being mounted over the outer surface of the modular display panel;

wherein the front side of the printed circuit board is sealed to be waterproof and the casing is sealed to be waterproof so that the modular display panel is sealed to be waterproof;

wherein the modular display panel is configured to be cooled passively without fans; and

wherein the modular display panel is configured to be exposed to an external environment without a protective waterproof enclosure.

22. The modular display panel of claim 21, further comprising:

a height extending from a first edge of the modular display panel to an opposite second edge of the modular display panel;

a width extending from a third edge of the modular display panel to an opposite fourth edge of the modular display panel; and

wherein the printed circuit board extends to each of the first edge, the opposite second edge, the third edge, and the opposite fourth edge.

23. The modular display panel of claim 21, further comprising an integrated power and data connector electrically coupled to the circuit and the power supply.

24. The modular display panel of claim 21, wherein the circuit comprises a scan controller configured to determine individual parameters of the plurality of LEDs in order to display an image.

25. The modular display panel of claim 21, wherein each of the LEDs comprises a surface that is exposed to an external environment.

26. The modular display panel of claim 21, wherein the modular display panel is configured to be operational when submerged in water up to a depth of one meter.

27. The modular display panel of claim 21, wherein the modular display panel is configured to be operational when submerged in water to a depth greater than one meter.

28. The modular display panel of claim 21, wherein the power supply comprises an alternating current/direct current (AC/DC) converter, and wherein the power supply is configured to receive AC power and output DC power to the plurality of LEDs.

29. The modular display panel of claim 21, wherein the power supply comprises a down converter that down converts a direct current (DC) voltage at a first level to a DC voltage at a second level, the second level being lower than the first level.

30. A modular light emitting diode (LED) display panel comprising:

a plastic casing;

a printed circuit board attached to the plastic casing;

a plurality of LEDs arranged as pixels and attached to a first side of the printed circuit board, wherein the pixels are arranged in a rectangular array comprising at least fifty pixels;

an environmental protection structure disposed over the plurality of LEDs;

a driver circuit attached to the printed circuit board and disposed in the plastic casing; and

a power supply disposed at a second side of the printed circuit board, the second side being opposite the first side, wherein the power supply comprises an alternating current/direct current (AC/DC) converter, and wherein the power supply is configured to receive AC power and output DC power to the plurality of LEDs, wherein the panel is sealed to be waterproof, the panel comprising an ingress protection (IP) rating of IP 67 or IP 68, wherein the modular LED display panel is configured to be modularly attached to other modular LED display panels to form a display area that is larger than the modular LED display panel.