HDLO-1414 Просмотр технического описания (PDF) - HP => Agilent Technologies

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HDLO-1414

Four Character Smart Alphanumeric Displays

HP => Agilent Technologies 

8

CHARACTER RAM

ASCII DECODER

A0 – A1

2 WRITE

ADDRESS

DATA

OUT

7

CHARACTER

SELECT

D0 – D6

7 DATA IN

COLUMN

5

DATA

WRITE

WR

(4 x 7)

3 ROW

SELECT

OSC

+ 32

Figure 2. Display Internal Block Diagram.

ROW

DRIVERS

COLUMN

DRIVERS

+7

ROW

SELECT

DISPLAY

applied to the inputs until VDD

has been turned on, and high

transient input voltages should be

eliminated.

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 recommended

for use with heated Terpene, or

solutions of propylene glycol

monomethyl ether and

monoethanolamine.

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.

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