Operation Manual
EL320.240.36-HB Display
Beneq Oy
Olarinluoma 9
Tel. +358 9 7599 530
VAT ID FI19563372
FI-02200 Espoo
Fax +358 9 7599 5310
www.beneq.com
Finland
www.lumineq.com
Date: February 13, 2017
Document number: ED000812C
Page | 10
3.5
Internal frame buffer
This display includes an internal frame buffer. The display frame rate and the display
brightness are independent of user-supplied input data timing. The display frame rate can be
controlled through the digital dimming feature as described below.
CAUTION:
The display includes an internal frame buffer. In order to blank the display image
in the event of a system malfunction, pull down the VS signal.
3.6
Dimming
There are two standard methods for dimming the EL320.240.36-HB display. Analog dimming
using the J2 dimming connector described on page 7 of this manual allows for manual
dimming from 100% to approximately 5% of the full brightness. To perform analog dimming,
connect a 50 kΩ variable resistor between LUMA and GND. Alternatively, an external voltage
or current mode D/A converter may be used to facilitate dimming by sinking a maximum of
250 µA (for maximum dimming) from LUMA to GND on the input connector. Open circuit
voltage is 4 V nominal.
The internal scan frequency can be controlled via the LUMC and LUMD inputs. When LUMC
and LUMD are left open, the scan rate is determined by the SCAN signal (pin 4) on the data
input connector. With the combination of LUMC and LUMD, the following and luminance levels
are obtained:
Table 5. Luminance control
Approx. relative luminance
100%
75%
50%
30%
100%
50%
LUMD (internal pull up)
High
High
Low
Low
Open
Open
LUMC (internal pull up)
High
Low
High
Low
Open
Open
SCAN (J1 pin 4)
Open
Open
Open
Open
High
Low
3.7
Self-test mode
The display incorporates a self-test mode composed of two patterns displayed at maximum
frame rate for approximately 30 seconds each, and then repeated. The patterns are as
follows: 50/50 Checkerboard and Full On. The self-test mode is entered by leaving pin 3 on
J1 unconnected or pulled high. This pin has an internal pull-up. Connect pin 3 on J1 to ground
for normal display operation.
