8

Figure 2. Display internal block diagram.

Soldering Instructions

The HDLX-1414 is compatible with hand- and wave-solder

processes. The use of a no-clean flux is recommended.

The polycarbonate lens on these displays is incompatible

with some fluxes and cleaning solutions. It is not rec-

ommended for use with heated Terpene, or solutions

of propylene glycol monomethyl ether and monoetha-

nolamine.

For further information on soldering and post-solder

cleaning, see Application Note 1027, Soldering LED

Components.

Contrast Enhancement

The objective of contrast enhancement is to provide good

readability in the end user’s ambient lighting conditions.

By using both luminance (brightness) and chrominance

(color) contrast techniques, the ON dots of the display can

be made to stand out against a dark background.

For further information on contrast enhancement, see

Application Note 1015, Contrast Enhancement Techniques

for LED Displays.

CHARACTER RAM

ASCII DECODER

WRITE

ADDRESS

A0 – A1

2

D0 – D6

7

DATA IN

DATA

OUT

7

CHARACTER

SELECT

COLUMN

DATA

5

3 ROW

SELECT

OSC

+ 32

+ 7

ROW

DRIVERS

DISPLAY

COLUMN

DRIVERS

ROW

SELECT

WRITE

(4 x 7)

WR