nl10276bc16_01 NEC, nl10276bc16_01 Datasheet - Page 10

• Manufacturer Part Number: nl10276bc16_01
• Description: TFT COLOR LCD MODULE
• Manufacturer: NEC

4.3.2 Backlight lamp
Note1: This product consists of 4 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"
Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio,
Note4: This product's backlight consists of 2 lamp holders, and each lamp holder contains 2 lamps.
Note5: In case "FO" is not the recommended value, beat noise may display on the screen, because
Note6: Method of lamp cable installation may invite fluctuation of lamp current and voltage or
Lamp current
Lamp voltage
Lamp starting voltage
Lamp oscillation frequency
are the voltage value between low voltage side (Cold) and high voltage side (Hot).
power 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).
2 lamps are contained in the 1 lamp holder, and both lamps are connected to 1 low voltage
cable. Lamp current must be 5.0mArms typical for each lamp, and sum of 2 lamps must be
10mArms typical. (with whole product: 20.0mArms) The lamp current should be measured
by high-frequency current meter at the low voltage terminal.
of 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.
Pb
Pa
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
FO =
Parameter
0
th: Horizontal cycle (See "4.9.2 Timing characteristics".)
n: Natural number (1, 2, 3
Sa
1
4
th
1
DATA SHEET DOD-PD-0270 (1st edition)
Symbol
VBLH
(2n-1)
IBL
FO
Sb
VS
1,140
min.
875
3.0
49
-
)
typ.
440
5.0
54
-
-
Pa - Pb
Sa - Sb
Pb
Sb
max.
5.5
59
-
-
-
100 5 %
100 5 %
mArms
Vrms
Vrms
Vrms
Unit
kHz
NL10276BC16-01
(Ta=25 C, Note1)
At IBL=5.0mArms:
Note3, Note4
Note2, Note3
Note2, Note3
Note2,Note3
Ta = 25 C
400cd/m
Ta = 0 C
Remarks
Note5
2
10