LED display assembly
AssigneeJohn S. Youngquist
InventorsJohn S. Youngquist, John W. Toulmin
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 rectangularly shaped 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 rectangular light-emitting diode surface-mounted thereon with reflowed solder connections, each diode providing a dot of output light when activated,
- said rectangular light-emitting diodes being disposed in a two-dimensional row and column overlapping herringbone pattern array where rectangular diodes in each row are all parallel to one another but are all oblique with respect to diodes in adjacent rows, and such that at least one of the ends of each of the light-emitting diodes in a row is approximately centered with respect to a light-emitting diode in an adjacent row the diodes in each successive row slanting away from those in the other adjacent row or rows.
A method of making a two-dimensional visual display of rectangular light-emitting diodes surface-mounted on a printed circuit board, said method comprising:
- disposing rectangular light-emitting diodes in a two-dimensional row and column array in an overlapping herringbone pattern, such that at least one of the ends of each one of the light-emitting diodes in a row is approximately centered with respect to a light-emitting diode in an adjacent row, on a printed circuit board having pairs of solder-coated conductive mounting pads, and
- a surface mounting a light-emitting diode on each said pair of pads using reflowed solder, the diode having an anode mounted to one pad of an associated pair and a cathode mounted to the other pad of the associated pair.
Dependencies are inferred from the claim text.