NL128102BC29_10 NEC, NL128102BC29_10 Datasheet - Page 9

• Manufacturer Part Number: NL128102BC29_10
• Description: Display Module
• Manufacturer: NEC

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4.3.2 Backlight lamp
Note1: This product consists of 6 backlight lamps, and these specifications are for each lamp.
Note2: The lamp voltage cycle between lamps should be kept on a same phase. "VS" and "VBLH" are
Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio, power
Note4: In case "FO" is not the recommended value, beat noise may display on the screen, because of
Note5: Method of lamp cable installation may invite fluctuation of lamp current and voltage or
Lamp current
Lamp voltage
Lamp starting voltage
Lamp oscillation frequency
the voltage value between low voltage side (Cold) and high voltage side (Hot).
supply current peak ratio and waveform space ratio) should be less than 5 % (See the following
figure.). If the waveform is asymmetric, DC (Direct current) element apply into the lamp. In
this case, a lamp lifetime may be shortened, because a distribution of a lamp enclosure
substance inclines toward one side between low voltage terminal (Cold terminal) and high
voltage terminal (Hot terminal). When designing the inverter, evaluate asymmetric of lamp
working waveform sufficiently.
interference between "FO" and "1/th". Recommended value of "FO" is as following.
asymmetric of lamp working waveform. When designing method of lamp cable installation,
evaluate the fluctuation of lamp current, voltage and working waveform sufficiently.
Pa: Supply voltage/current peak for positive, Pb: Supply voltage/current peak for negative
Sa: Waveform space for positive part, Sb: Waveform space for negative part
Parameter
FO =
Pb
Pa
th: Horizontal cycle (See "4.9.1 Timing characteristics".)
n: Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)
0
1
4
PRELIMINARY DATA SHEET DOD-PP-0492 (2nd edition)
Sa
×
th
1
× (2n-1)
Symbol
VBLH
IBL
VS
FO
Sb
1,350
1,550
min.
3.5
40
-
typ.
650
6.0
48
-
-
⏐Pa - Pb⏐
⏐Sa - Sb⏐
Pb
Sb
max.
7.0
55
-
-
-
× 100 ≤ 5 %
× 100 ≤ 5 %
mArms
Vrms
Vrms
Vrms
Unit
kHz
NL128102BC29-10
Note2, Note3, Note6
Note2, Note3, Note6
at IBL=6.0mArms:
(Ta=25°C, Note1)
Note2, Note3
(300) cd/m
Ta = 25°C
Ta = 0°C
Remarks
Note3
Note4
2
9
2
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