Projector with array LED matrix light source
OwnerJiahn-Chang Wuinventor
Life of this patent
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Abstract
A light emitting diode matrix array is used as the light source of a picture projection system. Each cell of the LED matrix array has an assembly of one or more red, green and blue LEDs with metal lead structures to individually energize these LEDs. The lights emitted from the LED assembly is transmitted through one or more programmable liquid crystal plate or digital micro-mirror device to control the light transmission, and then merged together for projection as a pixel onto a screen.
Claims23
A picture projection system, comprising:
- a projection screen;
- a plurality of cells arranged in matrix array serving as light source for projection of picture on said screen,
- each one of said cells having a light emitting diode (LED) assembly, programmable control means to control the amount of light transmission from each one of said LED, and merging and focusing means to project the transmitted light onto said projection screen as a pixel.
8 The picture projection system as described in claim 6, wherein each of said first metal bar, said second metal bar and third metal has a pedestal raised to the same elevation of said grid to shorten the distance for wire-bonding to respective LED.
12 The picture projection system as described in claim 2, wherein each said LED has a positive bottom and a negative bottom electrode, and the LED assembly comprises three strips of metal frames with:
- one strip bridged by red LEDs so that all the red LEDs are connected in series,
- a second strip bridged by green LEDs so that all the green LEDs are connected in series, and
- a third strip bridged by blue LEDs so that all the blue LEDs are connected, and
- air space each one of metal frames for heat removal.
Dependencies are inferred from the claim text.