NL160120AC27_22B NEC, NL160120AC27_22B Datasheet - Page 16

• Manufacturer Part Number: NL160120AC27_22B
• Description: Display Module
• Manufacturer: NEC

www.DataSheet.co.kr
4.6 LUMINANCE CONTROL
4.6.1 Luminance control methods
Variable resistor
control
Voltage control
Pulse width
modulation
Note1: In case of the variable resistor control method and the voltage control method, noises may appear on
Note2: The inverter will stop working, if the Low period of BRTP signal is more than 500ms while BRTC
Note3: These data are the target values.
Note4: Do not set the variable resistor, BRTI voltage and Pulse width modulation in less than 1.5kΩ or less
Note5: See "4.6.2 Detail of BRTI timing".
Note6: See "4.6.3 Detail of BRTP timing".
Method
Note1
Note1
Note5
Note1
Note2
Note6
the display image depending on the input signals timing for LCD panel signal processing board.
signal is High or Open. Then the backlight will not turn on anymore, even if BRTP signal is input again.
This is not out of order. The inverter will start to work when power is supplied again.
than 0.2V or less than 0.2(Duty ratio). Otherwise flicker or display mura may cause, or the lamp may
not be turned on.
Use PWM method, if interference noises appear on the display image!
• Adjustment
The variable resistor (R) for luminance control should be 10kΩ
±5%, 1/10W. Minimum point of the resistance is the minimum
luminance and maximum point of the resistance is the maximum
luminance.
The resistor (R) must be connected between BRTH-BRTI
terminals.
• Luminance ratio Note3
• Adjustment
Voltage control method works, when BRTH terminal is 0V and
VBI voltage is input between BRTI-BRTH terminals. This
control method can carry out continuation adjustment of
luminance.
Luminance is the maximum when BRTI terminal is Open.
• Luminance ratio Note3
• Adjustment
terminal is Low and PWM signal (BRTP signal) is input into
BRTP terminal. The luminance is controlled by duty ratio of
BRTP signal.
• Luminance ratio Note3
Pulse width modulation (PWM) method works, when PWSEL
BRTI Voltage (VBI)
PRELIMINARY DATA SHEET DOD-PP-0619 (1st edition)
BRTH
Resistance
Duty ratio
Adjustment and luminance ratio
1.5 kΩ Note4
10 kΩ
0.2 V Note4
1.0 V
0.2
1.0
Note4
R
100% (Max. Luminance)
100% (Max. Luminance)
100% (Max. Luminance)
20% (Min. Luminance)
20% (Min. Luminance)
20% (Min. Luminance)
Luminance ratio
Luminance ratio
Luminance ratio
BRTI
PWSEL terminal
High or Open
NL160120AC27-22B
Low
BRTP terminal
BRTP signal
Open
16
Datasheet pdf - http://www.DataSheet4U.net/