Large scale display using leds

• US 5,450,301 A
• Filed: 10/05/1993
• Issued: 09/12/1995
• Est. Priority Date: 10/05/1993
• Status: Expired due to Fees

• Current Assignee: Trans-Lux Corporation (Unilumin Group Co. Ltd.)
• Original Assignee: Trans-Lux Corporation (Unilumin Group Co. Ltd.)
• Inventors: Waltz, Thomas M., Dagenais, Alfred
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Raab, Sara Sachie
• Application Number:
  US08/131,895
• Time in Patent Office: 707 Days
• Field of Search: 362/231, 362/800, 362/812, 40/544, 40/581, 340/815.45, 340/815.65, 345/82, 345/83
• US Class Current: 362/231
• CPC Class Codes: G09F 13/0472 Traffic signs
• 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 large scale display is made of several panels, each holding several display elements defined by LEDs. Preferably, each panel is arranged so that it can directly replace, both mechanically and electrically, a panel having incandescent bulbs as display elements.

Claims

1. A large scale display comprising:

a plurality of panels, each panel having a plurality of display elements, said panels being constructed and arranged to form a rectangular array defined by said display elements;

wherein each display element includes a plurality of LED diodes arranged in a preselected pattern on a respective panel;

wherein at least one of said display elements includes a first set of diodes emitting red light and a second set of diodes emitting green light, said first and second sets of diodes cooperating to allow said display to be perceived as amber; and

wherein at least one of said diodes emitting red light is surrounded by and in contact with six diodes emitting green light.

2. A replacement panel for incandescent bulb display panels, said replacement panel comprising;

a board;

a plurality of display elements mounted on said board,

wherein each display element includes a plurality of LED diodes arranged in a preselected pattern on a respective panel;

wherein at least one of said display elements includes a first set of diodes emitting red light and a second set of diodes emitting green light, said first and second sets of diodes cooperating to allow said display to be perceived as amber; and

wherein at least one of said diodes emitting red light is surrounded by and in contact with six diodes emitting green light.