LED display assembly
AssigneeJohn S. Youngquist
InventorsJohn S. Youngquist, John W. Toulman
Life of this patent
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Abstract
Surface mounted LEDs are arrayed in special patterns to provide a relatively high resolution dot-matrix visual display and/or multi-segment character displays. Especially abbreviated solder bonding pads are utilized to obtain a higher density packing of the surface mounted arrays in at least some embodiments. Special anti-glare coatings and structures are employed to reduce ambient light reflections for aircraft instrument applications. Multi-colored display outputs are also provided.
Claims13
A two-dimensional visual display of light-emitting diodes surface-mounted on a printed circuit board, said display comprising:
- a printed circuit board having pairs of solder-coated conductive mounting pads, each pair of pads having a respectively corresponding anode and cathode of a light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said light-emitting diodes being disposed in a two-dimensional row and column array;
- wherein said conductive pads extend beyond edges of the light diodes by a distance substantially less than 0.010 inch.
A two dimensional dot matrix visual display of light-emitting diodes surface-mounted on a printed circuit board, said display comprising:
- a printed circuit board having pairs of solder-coated conductive mounting pads, each pair of pads having a respectively corresponding anode and cathode of a light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said light-emitting diodes being disposed in a two-dimensional row and column array;
- wherein said light-emitting diodes have an oblong shape with a long dimension D and are arrayed so as to have a spacing P between diode light dot outputs that is substantially less than D in both row and column directions.
A two-dimensional visual display of light-emitting diodes surface-mounted on a printed circuit board, said display comprising:
- a printed circuit board having pairs of solder-coated conductive mounting pads, each pair of pads having a respectively corresponding anode and cathode of a light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said light-emitting diodes being disposed in a two-dimensional row and column array;
- wherein said display is incorporated within an assembly of stacked substantially planar elements comprising in succession:
- an optical lens/graticule layer;
- a light polarizing filter layer;
- said light-emitting diode array on its multi-layered printed circuit board having row and column connection points at its periphery;
- and
- a driver printed circuit board connected to said peripheral connection points through connections disposed within at least one spacer structure and having integrated circuit LED drivers on said driver printed circuit board.
A two-dimensional visual display of light-emitting diodes surface-mounted on a printed circuit board, said display comprising:
- a printed circuit board having pairs of solder-coated conductive mounting pads, each pair of pads having a respectively corresponding anode and cathode of a light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said light-emitting diodes being disposed in a two-dimensional row and column array;
- wherein said light-emitting diodes are disposed under a multi-apertured mask representing a segmented character display
- wherein each diode has an oblong shape with the long dimension of all diodes being oriented at a slant angle with respect to both horizontal and vertical character dimensions;
- and
- wherein said angle is substantially 45° with respect to both horizontal and vertical character dimensions.
A two-dimensional visual display of light-emitting diodes surface-mounted on a printed circuit board, said display comprising:
- a printed circuit board having pairs of solder-coated conductive mounting pads, each pair of pads having a respectively corresponding anode and cathode of a light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said light-emitting diodes being disposed in a two-dimensional row and column array;
- wherein said light-emitting diodes are disposed under a multi-apertured mask representing a segmented character display;
- wherein said mask includes seven segment apertures;
- and
- wherein the segmented character mask is associated with at least seven diodes having oblong shape and arrayed in vertically stacked linear groups of two, three and two diodes that have long dimensions slanted with respect to horizontal and vertical character dimensions.
A two-dimensional visual display of light-emitting diodes surface-mounted on a printed circuit board, said display comprising:
- a printed circuit board having pairs of solder-coated conductive mounting pads, each pair of pads having a respectively corresponding anode and cathode of a light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said light-emitting diodes being disposed in a two-dimensional row and column array;
- wherein said surface-mounted light-emitting diodes are coated with an anti-reflective coating to reduce reflected ambient light therefrom.
Dependencies are inferred from the claim text.