Issue Date: Apr.11.2000
Note (7) The lifetime (Hr) of a lamp can be defined as the time in which it continues to operate
under the condition Ta = 25±2℃ and IL = 6.0 mArms until one of the following event
(1) When the brightness becomes 50% or lower than its original,
(2) When the effective ignition length becomes 80% or lower than its original value.
(Effective ignition length is defined as an area that has less than 70% brightness
compared to the brightness in the center point.)
Note (8) The waveform of the voltage output of inverter must be area-symmetric and the design
of the inverter must have specifications for the modularized lamp. The performance of
the backlight, such as lifetime or brightness, is greatly influenced by the characteristics
of the DC-AC inverter for the lamp. All the parameters of an inverter should be
designed with care so as not to produce too much current leakage from high-voltage
output of the inverter. When designing or ordering the inverter, please make sure that a
poor lighting caused by the mismatch of the backlight and the inverter (miss-lighting,
flicker, etc.) never occurs. When the above situation is confirmed, the module should
be operated in the same manners as it is installed in your instrument.