Recorders – Light or beam recording – Including record receiver or handling means therefor
Patent
1991-05-13
1993-08-10
Fuller, Benjamin R.
Recorders
Light or beam recording
Including record receiver or handling means therefor
346139R, 346145, 361704, 361707, G01D 1514, H05K 720
Patent
active
052353478
ABSTRACT:
A light emitting diode print head has an aluminum substrate or mother plate. A plurality of stainless steel tiles are assembled in a row on the substrate. Each of the tiles has a row of dice, each of which has a row of light emitting diodes. The tiles are assembled so that the LEDs are in a row extending across the print head with the adjacent LEDs at the edges of each of tile being a short distance apart. Compensation for differences in coefficient of thermal expansion between the tiles and substrate is provided by a pair of stainless steel strips adhesively bonded between the tiles and substrate. Each strip is bonded along an edge of the row of tiles away from the row of LEDs by a compliant adhesive. A thermally conductive compliant adhesive is provided between the tiles and substrate beneath the LEDs for heat transfer. The stainless steel strips serve as compensation for the difference in coefficient of thermal expansion between the tiles and substrate. There is a yield increase in print heads of at least 10% without any significant cost increase.
REFERENCES:
patent: 4821051 (1989-04-01), Hediger
patent: 4829321 (1989-05-01), Iizuka et al.
patent: 5014074 (1991-05-01), Dody et al.
Fuller Benjamin R.
Hewlett--Packard Company
Yockey David
LandOfFree
Light emitting diode print head does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light emitting diode print head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light emitting diode print head will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1728726