NL3224BC35-20 NEC, NL3224BC35-20 Datasheet - Page 10

• Manufacturer Part Number: NL3224BC35-20
• Description: DISPLAY, LCD GRAPHIC, 320 X 240 DOTS
• Manufacturer: NEC

Specifications of NL3224BC35-20

• Viewing Area (h X W): 83.52mm X 111.36mm
• Supply Voltage: 5V
• Display Mode: Active
• Rohs Compliant: Yes
• Lcd Display Type: TFT
• Interface Type: CMOS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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"
Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio,
Note4: The inverter should be designed so that the lamp starting voltage can be maintained for more
Note5: In case "FO" is not the recommended value, beat noise may display on the screen, because of
Note6: Method of lamp cable installation may invite fluctuation of lamp current and voltage or
Note2, Note3, Note4, Note7
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.
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.
Parameter
Pb
Pa
FO =
Note2, Note3
0
th: Horizontal cycle (See "4.9 Input signal timings".)
n:
Note3
Note5
Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)
1
4
Sa
×
DATA SHEET DOD-PP-0297 (15th edition)
th
1
Symbol
VBLH
IBL
VS
FO
× (2n-1)
Sb
min.
550
780
4.5
39
-
typ.
350
5.0
43
-
-
⏐Pa - Pb⏐
⏐Sa - Sb⏐
max.
5.5
Pb
Sb
47
-
-
-
× 100 ≤ 5 %
× 100 ≤ 5 %
mArms
Vrms
Vrms
Vrms
Unit
kHz
NL3224BC35-20
at IBL= 5.0mArms:
(Ta=25°C, Note1)
L= 400cd/m
Ta= -10°C
Ta= 25°C
Remarks
-
-
2
10