NL128102AC28-07 NEC Electronics, NL128102AC28-07 Datasheet - Page 13

• Manufacturer Part Number: NL128102AC28-07
• Manufacturer: NEC Electronics

Specifications of NL128102AC28-07

• Lead Free Status / Rohs Status: Not Compliant

(4) Luminance control with external pulse
Frequency
“L” period
Pulse-width
Luminance ratio
Input voltage
Note 1: See the following formula for luminance control frequency.
Note 2: In case tLPW is out of 50 ms, backlight will turn off by its protection circuits.
Note 3: Max. Luminance at 100%
Luminance control with external pulse is valid, when PWSEL = “L” and external pulse signal is inputted to BRTP.
This luminance control is controlled by duty ratio, and luminance is as follows.
In BRTC = “H” or “OPEN”, the inverter will stop working when BRTP terminal is fixed to “L” in the condition of
PWSEL = “L”. In this case, backlight will not turn on, even if external pulse signal is inputted to BRTP again.
This is not out of order. Inverter will start to work when power is supplied again.
The display image may be disturbed by luminance control with external pulse when set up frequency is
interfered with internal signal frequency.
Duty ratio = 100%: Max. luminance
Duty ratio = 20%:
Parameter
BRTC
BRTP
BRTP
Luminance control frequency = Vsync frequency × (n+0.25) [or (n+0.75)]
V
50%
V
iBH1
iBL1
Min. luminance
tHPW/tPW
Symbol
1/tPW
tLPW
V
V
iBL1
iBH1
–
0 < t ≤ 50 ms
Min.
185
Data Sheet EN0537EJ1V0DS
2.0
20
–
–
0
tHPW
30 to 100
Typ.
0 < tLPW ≤ 50 ms
–
–
–
–
–
tPW
Max.
325
100
0.8
50
–
5
0 < t ≤ 50 ms
tLPW
Unit
ms
Hz
%
%
V
V
NL128102AC28-07
Remarks
Note 1
Note 2
Note 3
–
–
–
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