NL10276BC30-07 NEC, NL10276BC30-07 Datasheet - Page 14

• Manufacturer Part Number: NL10276BC30-07
• Description: TFT COLOR LCD MODULE
• Manufacturer: NEC

(4) Luminance control
[OUTSIDE CONTROL FOR LUMINANCE]
How to adjust
Remark1: Do not keep pins free (except N.C. Pin) to avoid noise issue.
Remark2: GND and GNDB should be connected to system ground in customer equipment.
Remark: The display may be disturbed depend on input signal timing in this luminance control method. In
Form
Outside control is valid, when PWSEL=”L” and input signal for BRTP. Luminance can be controlled by the
duty value of input signal for BRTP.
BRTC must not fix on "L" in the condition of PWSEL= "L" and BRTC ="H" or "Open". Otherwise, the
inverter stops. In this case, even if BRTP pulse is input again, the backlight will not turn on. Please input
power supply to the inverter again.
Duty=20%: luminance is minimum.
Duty=100%: luminance is maximum.
BRTP
BRTC
BRTP
this case, adopt outside control for luminance to avoid interference of the input signal timing and
backlight driving timing.
See OUTSIDE
CONTROL
FOR
LUMINANCE
PWSEL=“L”
ViH
50%
PWM
ViL
BRTH should be fixed to 0V to control
luminance by voltage. The range of
input voltage between BRTL and
GNDB is as follows.
Maximum luminance: 1V(TBD%)
Minimum luminance: 0V(TBD%)
0＜t 50ms
tHPW
Voltage
PWSEL=“H” or “Open” and BRTP=”OPEN”
tPW
0＜tLPW 50ms
The variable resistor for luminance control
should be 10 k type, and zero point of the
resistor corresponds to the minimum of
luminance.
Maximum luminance: R=10 k (TBD%)
Minimum luminance : R= 0 (TBD%)
Mating variable resistor: 10 k
B curve, 1/10W
tLPW
0＜t 50ms
BRTH
NEC Corporation
Variable resistor
DOD-M-0094
R
BRTL
14/27