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MAX7221EWG+ 开发手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
LED驱动器
封装:
SOIC-24
描述:
MAXIM INTEGRATED PRODUCTS MAX7221EWG+ 芯片, 发光二极管驱动器
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Maxim > Design Support > Technical Documents > Application Notes > Automotive > APP 1193
Maxim > Design Support > Technical Documents > Application Notes > Display Drivers > APP 1193
Keywords: LEDs, LCDs, VFDs, FIPs, CRT, CRTs, Flip Dot, OLEDs, PLEDs
APPLICATION NOTE 1193
Electronic Displays Comparison
Sep 09, 2002
Abstract: This note compares advantages and disadvantages of Cathode Ray Tubes, Electro-
Luminescent, Flip-Dot, Incandescent Light Bulbs, Liquid Crystal, Light Emitting Diode, Organic LEDs,
Polymer LEDs, Glow Discharge, Plasma Display Panels, and Vacuum Fluorescent Display technologies.
This note compares the main electronic displays technologies in the table below. Each display type is
described briefly, and the relative advantages and disadvantages are reviewed.
Display
Type
Acronym Emissive
or
Reflective
Technology Advantages Disadvantages
Cathode Ray
Tube
CRT Emissive The CRT is a
vacuum tube using
a hot filament to
generate thermo-
electrons,
electrostatic and/or
magnetic fields to
focus the electrons
into a beam
attracted to the high
voltage anode which
is the phosphor
coated screen.
Electrons colliding
with the phosphor
emit luminous
radiation. Color
CRTs typically use 3
electron sources
(guns) to target red,
green, and blue
phosphor patterns
on the screen.
Very bright
Wide viewing
angle
No mask, so
no pixel size
limitation for
mono
Minimum
pixel size
0.2mm (color)
Low cost
standard
sizes
Low cost
high-res
color
Wide
operating
temperature
range
Moderate
(20khrs+) life
High (5kV to 20kV+)
drive voltages
Not a flat panel (rare
exceptions)
Can be fragile,
particularly neck-end
Heavy
Source of X-rays
unless screened
Affected by magnetic
fields
Difficult to recycle or
dispose of
Electro-
Luminescent
ELD Emissive EL displays are solid
state displays which
Flat panel
Bright, light
150V+ operating
voltages
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