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HDSP-5521 Datasheet(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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HDSP-5521 Datasheet(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
2 / 10 page 2 Contrast Enhancement The objective of contrast enhancement is to provide good display readability in the end use ambient light. The concept is to employ both luminance and chromi- nance contrast techniques to enhance the readability. This is accomplished by having the OFF dots blend into the display background and the ON dots stand out vividly against this same background. Therefore, these display devices are assembled with a gray package and matching encapsulating epoxy in the dots. Contrast enhancement may be achieved by using one of the following suggested filters: Standard Red and AlGaAs Red (HDSP-5300/H150) Panelgraphic RUBY RED 60 SGL-Homalite H100-1605 RED 3M Louvered Filter R6610 RED or N0210 GRAY HER (HDSP-5500) Panelgraphic SCARLET RED 60 SGL-Homalite H100-1670 RED or H100-1250 GRAY 3M Louvered Filter R6610 RED or N0210 GRAY Yellow (HDSP-5700) Panelgraphic YELLOW 27 or GRAY 10 SGL-Homalite H100-1720 AMBER or H100-1250 GRAY 3M Louvered Filter A5910 AMBER or N0210 GRAY Green (HDSP-5600) Panelgraphic GREEN 48 SGL-Homalite H100-1440 GREEN or H100-1250 GRAY 3M Louvered Filter YG6610 RED or N0210 GRAY For further information on contrast enhancement please see Application Note 1015. Mechanical Specially developed plastics are used to optimize the displays optical performance. These plastics restrict the solvents that may be used for cleaning. Only mixtures of Freon (F113) and alcohol should be used for vapor clean- ing processes. Total immersion time in the vapors is two minutes. Some suggested mixtures are Freon TE, Arklone A or K, or Genesolv DI-15 or DE-15. A 60°C (140°F) water cleaning process may also be used. This process includes a neutralizer rinse (3% ammonia solution or equivalent), a surfactant rinse (1% detergent solution or equivalent), a water rinse, and a thorough air dry. Room temperature cleaning may be done with Freon T-E35 or T-P35, Ethanol, Isopropanol, or water with a mild detergent. Cleaning agents from the ketone family (acetone, methyl ethyl ketone, etc.) and from the chlorinated hydrocarbon family (methylene chloride, trichloroethylene, carbon tet- rachloride, etc.) are not recommended for cleaning LED parts. All of these various solvents attack or dissolve the encapsulating epoxies used to form the package of plastic LED parts. |
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Similar Description - HDSP-5521 |
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