NL6448BC33-53 NEC, NL6448BC33-53 Datasheet - Page 9

• Manufacturer Part Number: NL6448BC33-53
• Description: TFT DISPLAY, 10.4"
• Manufacturer: NEC

Specifications of NL6448BC33-53

• Lcd Display Type: VGA
• Interface Type: CMOS
• Viewing Area (h X W): 158.4mm X 211.2mm
• Supply Voltage: 5V
• Operating Temperature Range: -10°C To +70°C
• Pixel Size (h X W): 0.33mm X 0.33mm
• Backlight: RoHS Compliant
• Display Mode: Active
• Backlight Type: CCFL
• Display Technology: LCD
• Luminance: 380cd/m2
• Rohs Compliant: Yes
• Pixel Pitch (h X W): 0.33mm X 0.33mm
• Svhc: No SVHC (20-Jun-2011)

4.3.2 Backlight lamp
Lamp current
Lamp voltage
Lamp starting voltage
Lamp oscillation frequency
Note1: This product consists of 2 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: This product consists of 2 lamps. 2 lamps contain in the 1 lamp holder, and both lamps are
Note5: The inverter should be designed so that the lamp starting voltage can be maintained for more
Note6: In case "FO" is not the recommended value, beat noise may display on the screen, because of
Note7: Method of lamp cable installation may invite fluctuation of lamp current and voltage or
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.
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. The lamp current should be measured by
high-frequency current meter at the low voltage terminal.
than 1 second. Otherwise the lamp may not be turned on.
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
Pb
Parameter
Pa
FO =
0
th: Horizontal cycle (See "4.9.2 Timing characteristics".)
n: Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)
1
4
Sa
×
th
1
DATA SHEET DOD-PP-0150 (7th edition)
× (2n-1)
Symbol
VBLH
IBL
VS
FO
Sb
1,100
min.
850
2.0
50
-
typ.
520
5.0
-
-
-
⏐Pa - Pb⏐
⏐Sa - Sb⏐
Pb
Sb
max.
5.5
70
-
-
-
× 100 ≤ 5 %
× 100 ≤ 5 %
mArms
Vrms
Vrms
Vrms
Unit
kHz
NL6448BC33-53
at IBL=5.0mArms:
(Ta=25°C, Note1)
Note2, Note3,
Note2, Note3,
Note3, Note4
Note2, Note3
Note5, Note8
Note5, Note8
Ta = -10°C
Ta = 25°C
380cd/m
Remarks
Note6
2
9