Industrial Electronic Engineers, Inc.
SIZE
A
CODE IDENT NO.
05464
S03858–06–0205
Van Nuys, California
SCALE N/A
REV C
SHEET 23
7.1
Optical Characteristics (Continued)
Definition of optical response.
tt
f
t
d
t
t
r
d
90% ON
10% ON
Excitation
Figure 16
Definition of Optical Response
7.2
Viewing Angle Adjustment
The factory preadjusts the viewing angle of the display by setting the LCD bias voltage to 10.2 Volts using the
on–board potentiometer. This is considered to be a nominal adjustment, but the user may prefer to vary this to
optimize the viewing for a particular application. The bias voltage is measured between V
CC
(pin #7) and V
BIAS
(pin #6).
The viewing angle and contrast ratio may be externally controlled using an additional 10K ohm potentiometer.
The potentiometer on the rear of the module must first be set to the maximum resistance by turning the
adjustment fully counterclockwise. A 10K ohm potentiometer can then be connected between pin numbers 4
and 7 on the connector. Since the module has wide viewing angle characteristics and built–in temperature
compensation of the viewing angle, the user may find that this external viewing control is unnecessary.
8.0
EL BACKLIGHTING
8.1
EL Backlight Description
The module contains an AC EL backlight which enables the LCD to read under low lighting conditions. The EL
lamp provides uniform lighting across the entire display surface. Since the lamp is a cold light source, no heat
is added to the module during operation.
8.2
Electrical Characteristics of EL Backlight
Typical measurements at 115VAC, 400Hz, unless otherwise noted.
Color:
Aviation Green
Radiance:
.051 Watts/ft
2
Spectral peak emission:
520mm
Chromaticity:
X = .230
±
.030, Y = .500
±
.030
Voltage Range:
41 to 130 Volts
Operating Frequency (max.):
600Hz
Power Requirements:
.035 Watts/inch
2