LED surface-mount device and LED display incorporating such device
First Claim
1. A lead frame for a surface-mount device, the lead frame comprising:
- an electrically conductive LED chip carrier part having a surface carrying a linear array of three LEDs adapted to be energized to produce in combination a substantially full range of colors, each LED having a first electrical terminal and a second electrical terminal, the first terminal of each of the three LEDs being electrically and thermally coupled to said chip carrying surface of said chip carrier part;
three electrically conductive connection parts separate from said chip carrier part, each of said three connection parts having a connection pad; and
the second terminal of each of said three LEDs being electrically coupled to the connection pad of a corresponding one of said three connection parts.
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Accused Products
Abstract
In one embodiment, a surface-mount device comprises a casing having opposed, first and second main surfaces, side surfaces, and end surfaces. A lead frame partially encased by the casing comprises (1) an electrically conductive LED chip carrier part having a surface carrying a linear array of three LEDs adapted to be energized to produce in combination a substantially full range of colors, each LED having a first electrical terminal and a second electrical terminal, the first terminal of each of the three LEDs being electrically and thermally coupled to the chip carrying surface of the chip carrier part; and (2) three electrically conductive connection parts separate from the chip carrier part, each of the three connection parts having a connection pad, the second terminal of each of the three LEDs being electrically coupled to the connection pad of a corresponding one of the three connection parts with a single wire bond. The linear array of LEDs extends in a first direction, and each of the chip carrier part and three connection parts has a lead. The leads are disposed in parallel relationship with each other and extend through the end surfaces of the casing in a second direction, the second direction being orthogonal to the first direction. An array of the surface-mount devices may be used in an LED display such as an indoor LED screen.
181 Citations
17 Claims
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1. A lead frame for a surface-mount device, the lead frame comprising:
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an electrically conductive LED chip carrier part having a surface carrying a linear array of three LEDs adapted to be energized to produce in combination a substantially full range of colors, each LED having a first electrical terminal and a second electrical terminal, the first terminal of each of the three LEDs being electrically and thermally coupled to said chip carrying surface of said chip carrier part; three electrically conductive connection parts separate from said chip carrier part, each of said three connection parts having a connection pad; and the second terminal of each of said three LEDs being electrically coupled to the connection pad of a corresponding one of said three connection parts. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A surface-mount device, comprising:
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a casing comprising opposed, first and second main surfaces, opposed side surfaces, and opposed end surfaces, the casing defining a cavity extending into the interior of the casing from the first main surface; and a lead frame partially encased by the casing, the lead frame comprising; an electrically conductive LED chip carrier part having a surface carrying a linear array of three LEDs adapted to be energized to produce in combination a substantially full range of colors, each LED having a first electrical terminal and a second electrical terminal, the first terminal of each of the three LEDs being electrically and thermally coupled to said chip carrying surface of said chip carrier part; three electrically conductive connection parts separate from said chip carrier part, each of said three connection parts having a connection pad; and the second terminal of each of said three LEDs being electrically coupled to the connection pad of a corresponding one of said three connection parts. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 17)
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16. An LED display comprising:
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a substrate carrying an array of surface-mount devices arranged in vertical columns and horizontal rows, each of said SMDs containing a vertically oriented, linear arrangement of three LEDs adapted to be energized to produce in combination a substantially fill range of colors and to define one pixel of the display; and signal processing and LED drive circuitry electrically connected to selectively energize said array of SMDs for producing visual images on said display.
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Specification