Operation Manual
EL512.256-H3 Series 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: ED000818B
Page | 8
4
Display features
4.1
Video data input
Four input signals are needed for video input. VS signal marks the topmost row, HS
envelopes the pixels in one row and VCLK indicates the valid pixel data. The visible pixels in a
row are the last 512 pixels before the fall of the HS. The topmost row displayed is the first HS
HIGH time ending after the rising edge of VS. If HS is running continuously, the rising edge of
the VS can be simultaneous to the previous falling or rising edge of the HS.
See details on the timing as well as setup and hold timing on pages 9 and 10.
4.2
Two-bits-parallel data
To reduce the input data frequency, the video data can be input two bits per clock cycle. The
two data inputs are organized so that the data for the odd columns, numbered from left to
the right at the viewers side, is input at the TVID (J1/ pin 7) and the data for the even
columns at VID (J1/ pin 15). The two-bits-parallel mode is selected by removing the jumper
2 of the pin strip PS1.
4.3
Display enable
The display can be totally shut off for screen save or power reduction by a LOW sate in the
ENABLE control input (J2/pin 6). When disabled, the display stops scanning and only the
DC/DC converter remains functional, lowering the power consumption to below 2 W. In
normal operation, the ENABLE input should be pulled HIGH or left disconnected (internal pull-
up).
4.4
Brightness control
The brightness of the display can be adjusted (approximately between 40% and 100%) by an
external 50 kΩ logarithmic potentiometer between the LUMPOT1 and LUMPOT 2 inputs
(J3/pins 1 and 2). The control function is done by feeding a small DC current signal via the
external potentiometer from LUMPOT1 (+5 V reference voltage) to LUMPOT2. If the two
inputs are left disconnected, the brightness is at its maximum level.
4.5
Low power mode
The power consumption of the display can be reduced typically to 4 W by using the low power
mode. This mode is selected when the _LOWPOW control input (J2/5) is pulled low. In normal
operation, _LOWPOW should be pulled HIGH or left disconnected. In the low power mode, the
contrast and average brightness of the display are slightly reduced.
