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Conference cookie::notes$archive:cd_v1

Title:	Welcome to the CD Notes Conference
Notice:	Welcome to COOKIE
Moderator:	COOKIE::ROLLOW

Created:	Mon Feb 17 1986
Last Modified:	Fri Mar 03 1989
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1517
Total number of notes:	13349

1119.0. "Lazer, and LCD lifespan." by KERNEL::SAWYER () Fri Mar 18 1988 05:55

   I understand that the lazer used in CD players lasts for approximately
   5000 hours, as mentioned in a previous note.  Some CD players feature
   a liquid crystal display (LCD), and I remember from several years ago,
   that they fade after 50,000 hours.

   Whereas I realise that the figures above mean that the CD player will
   last for quite a few years, I would be interested to hear about any
   information on improved lazer assemblies, and LCD displays, regarding
   lifespan etc.  What happens to the lazer after the 5000 hours, and
   does the figure regarding the LCD, mean hours of usage?  What about
   lifespan of the LED, and fluorescent displays which are used?

   I would also be interested to hear from anyone who has an old LCD
   watch, to see whether the display has indeed, faded after the quoted
   50,000 hours (5.7 years), or not.

   Thanks in anticipation,


   -- Tim.

T.R	Title	User	Personal Name	Date	Lines
1119.1	Which is it?	FACT01::LAWRENCE	Jim/Hartford A.C.T.,DTN 383-4523	`Fri Mar 18 1988 07:18`	5
	Is the 50,000 hours on LCD displays elapsed time or usage time? JL
1119.2	The laser might outlive you	PALMER::PALMER	half a bubble off plumb	`Fri Mar 18 1988 09:17`	6
	RE .0 The information I got from DEC's course on fiber optics is that the compact disk lasers have an incredible long life. The numbers quoted from the Mitsubishi spec sheet are the the CD lasers have a lifetime of 1000 years (@ 25�C) or 23 years (@ 50�C). =Ralph=
1119.3	Yeah, but LED/LCD's won't	VEEJAY::ECTOR	Ethnomusicologist Jr.	`Fri Mar 18 1988 14:11`	11
	I have an aging RCA (read Matsushita) VCR, which has an LED time/timer display. It was purchased in 1983 and has been fading for the last few months, so I suppose what you've read is possibly true. Whatever is right or wrong about any of this...it's for sure, that the lifetime of the laser is at least triple that of the best stylus. The Cruiser
1119.4	watch LCD's	GENRAL::SEAGLE	44% of statistics are meaningless	`Fri Mar 18 1988 18:03`	7
	My Seiko LCD watch (model A159) purchased in 1978 is still going strong without the "fade" mentioned. The only time the display has been off is to replace batteries (approximately once every 3 years) so that works out to about 87,600 hours. FWIW, David.
1119.5	:-)	2B::ZAHAREE	Hacker, diplomat, recalcitrant.	`Mon Mar 21 1988 11:20`	4
	Say, maybe CD players could be hacked to use one of those diode buttons that are used to increase the life of incandescent light bulbs. - M
1119.6	No probs here...	FACT01::LAWRENCE	Jim/Hartford A.C.T.,DTN 383-4523	`Mon Mar 28 1988 15:47`	7
	I too have a Seiko LCD digital that I bought in 1979. It's my second watch for non-work, but it still works perfectly, no problems with the display... Jim
1119.7	More irrelevant watch data	HOONOO::PESENTI	JP	`Mon Mar 28 1988 16:26`	2
	My new SEIKO alarm cronograph, purchased last week, claims that the LCD will last 7 years before beginning to fade (and so will the battery!).