Waterproof LED display

• US 6,364,507 B1
• Filed: 05/01/2000
• Issued: 04/02/2002
• Est. Priority Date: 05/01/2000
• Status: Expired due to Fees

• Current Assignee: Formosa Industrial Computing, Inc. (Taiwan Semiconductor Manufacturing Company Limited)
• Original Assignee: Formosa Industrial Computing, Inc. (Taiwan Semiconductor Manufacturing Company Limited)
• Inventors: Yang, Chung-Chin
• Primary Examiner(s): HUSAR, STEPHEN F
• Application Number:
  US09/562,416
• Time in Patent Office: 701 Days
• Field of Search: 362/812, 362/545, 362/800, 362/240, 362/246, 362/248, 362/267, 405/78, 405/79
• US Class Current: 362/248
• CPC Class Codes: F21V 11/00 Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 characterised by cooling arrangements F21V29/502
• CPC Class Codes: F21V 31/00 Gas-tight or water-tight arrangements
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09F 27/008 Sun shades, shades, hoods or louvres on electronic displays to minimise the effect of direct sun light on the display
• CPC Class Codes: G09F 9/3026 Video wall, i.e. stackable semiconductor matrix display modules video wall control systems G06F3/1446, G09G2300/026
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: Y10S 362/80 Light emitting diode
• CPC Class Codes: Y10S 362/812 Signs

Abstract

A waterproof LED display has a housing. A circuit board with a plurality of LED groups is mounted within the housing. A transparent sheet which has a smooth inner surface opposite to the circuit board and a coarse outer surface to prevent reflection of the sunshine, is provided outside the circuit board. A panel with a plurality of apertures to respectively correspond to the groups of LEDs is mounted outside the transparent sheet. Waterproof silica gel is spread over joints between the panel and the housing.

Claims

1. A waterproof LED display comprising:

a house (10) defined with an opening;

a circuit board (11) securely received in said housing (10) and having a plurality of LEDs (12) formed thereon;

a transparent sheet (13) securely received in said housing (1) and separated from said circuit board (11) and provided with a first side and a second side, said first side covering an illuminating face of said circuit board (11);

a panel (14) sealing said opening of said housing (10) to enclose said circuit board (11) and said transparent sheet (13) inside said housing (10), wherein the panel (14) is separated from said transparent sheet (13) and has a plurality of apertures (141) to correspond said LEDs (12); and

a waterproof silica gel spread over joints between said housing (10) and said panel (14), whereby said circuit board (11) and said LEDs are sealed from external water.

2. The waterproof LED display as claimed in claim 1, wherein said transparent sheet (13) is made of PVC material.

3. The waterproof LED display as claimed in claim 1, wherein said first side of said transparent sheet (13) has a smooth surface and the second side has a coarse surface.

4. The waterproof LED display as claimed in claim 1, wherein said panel (14) further comprises a plurality of eaves (142), each of said apertures (141) having formed thereabove one of the eaves (142).