NL10276AC30-04W NEC, NL10276AC30-04W Datasheet - Page 13

• Manufacturer Part Number: NL10276AC30-04W
• Description: LCD Module
• Manufacturer: NEC

4.6 LUMINANCE CONTROLS
4.6.1 Luminance control method
Note1: In case of the resistor control method and the voltage control method, noises may appear on the
Note2: In case BRTC signal is High or Open, the inverter will stop work when BRTP signal is fixed
Note3: These data are the target values.
Note4: See '4.3.2 Driving for backlight inverter'.
Note5: See '4.6.2 Detail of PWM timing'.
Two step control
Resistor control
Voltage control
Pulse width
modulation
Method
Note1
Note1
Note1
Note2
Note5
display image depending on the input signals timing for LCD panel signal processing board.
Use PWM method, if interference noises appear on the display image!
to Low. In this case, backlight will not turn on, even if BRTP signal is inputted again. This is
not out of order. Backlight inverter will start to work when power is supplied again.
adjustment of luminance, if it is adjusted within the rated
voltage for BRTL signal (ViB5).
• Adjustment
• Luminance ratio Note3
• Adjustment
• Luminance ratio Note3
• Adjustment
This control method can carry out two step adjustment of
luminance by ACA signal (ViB4).
• Luminance ratio Note3
• Adjustment
PWSEL signal is Low and PWM signal (BRTP signal) is
inputted into BRTP terminal. The luminance is controlled
by duty ratio of BRTP signal.
• Luminance ratio Note3
be 10kΩ type, B curve and 1/10W. Minimum point of
the resistor is the minimum luminance. Also maximum
point of the resistor is the maximum luminance.
This control method can carry out continuation
Pulse width modulation (PWM) method works, when
The variable resistor (R) for luminance control should
High (ViB4H) Note4
Low (ViB4L) Note4
BRTL Voltage (ViB5)
ACA voltage (ViB4)
Duty ratio Note4
Resistance
10 kΩ
0 kΩ
Adjustment and luminance ratio
1.0V
0.2
1.0
0V
GNDB
BRTH
R
100% (Maximum)
100% (Maximum)
Luminance ratio
100% (Maximum)
25% (Minimum)
25% (Minimum)
25% (Minimum)
Luminance ratio
Luminance ratio
Luminance ratio
100%
50%
BRTL
PWSEL signal
High or Open
Low
DOD-M-0514
NEC Corporation
BRTP signal
PWM signal
Open
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