NL6448BC26-09 NEC, NL6448BC26-09 Datasheet - Page 9

• Manufacturer Part Number: NL6448BC26-09
• Description: TFT DISPLAY, 8.4"
• Manufacturer: NEC

Specifications of NL6448BC26-09

• Lcd Display Type: VGA
• Display Mode: Active
• Interface Type: CMOS
• Viewing Area (h X W): 128.16mm X 170.88mm
• Supply Voltage: 5V
• Operating Temperature Range: -20°C To +70°C
• Pixel Size (h X W): 0.267mm X 0.267mm
• Backlight Type: CCFL
• Display Technology: LCD
• Luminance: 450cd/m2
• Rohs Compliant: Yes
• Pixel Pitch (h X W): 0.267mm X 0.267mm
• Svhc: No SVHC (20-Jun-2011)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.3.2 Backlight lamp
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"
Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio,
Note4: This product consists of 2 lamps. 2 lamps are contained in the 1 lamp holder, and both lamps
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
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). When designing the inverter, evaluate asymmetric
of lamp working waveform sufficiently.
are connected to 1 low voltage cable. Recommended lamp current is 5.0mArms typical for
each lamp, and sum of 2 lamps is 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.
Pa
Pb
Parameter
0
th: Horizontal cycle (See "4.9.2 Timing characteristics".)
n: Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)
Sa
FO =
DATA SHEET DOD-PP-0199 (4th edition)
1
4
Symbol
VBLH
IBL
VS
FO
Sb
×
th
1
× (2n-1)
1,050
1,250
min.
3.0
45
-
typ.
435
5.0
-
-
-
|Pa - Pb|
|Sa - Sb|
max.
Pb
Sb
5.5
60
-
-
-
× 100 ≤ 5%
× 100 ≤ 5%
mArms
Vrms
Vrms
Vrms
Unit
kHz
NL6448BC26-09
(Ta= 25°C, Note1)
at IBL= 5.0mArms:
Note2, Note3,
Note2, Note3,
Note3, Note4
Note2, Note3
Note5, Note8
Note5, Note8
L= 450cd/m
Ta= -20°C
Ta= 25°C
Remarks
Note6
2
9