modul lcd led training-day1
TRANSCRIPT
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Dis la
Device
Trainin‐ LCD & LED
Beginner Level
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• •
• LED TV
• Response Time
• HCFL
• HDMI• SD
• HD
• CEC
• HDCP
• Full HD
• Backli ht
• DLNA
• Hotel Mode
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• What is LCD ?
– Liquid
Crystal Display
• What is LCD TV?
– Is a Display Device that using Liquid Crystal Display
technology with
florescent
lamp
as
a light
source
to
technology.
• What is LED TV?
– Is a Display Device that using Liquid Crystal Display technology with LED as a light source to display p cture nstea o us ng a t o e ay u e tec no ogy.
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BacklightPanel Module
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• CCFL
• HCFL
• LED
–
– RGB
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• What is CCFL? – Cold Cathode Florescent Lamp
– Is
a
lighting
system
that
uses
two
phenomena:
• electron discharge & fluorescence.
properties which include:
– good luminous
intensity,
– high density (compact and light weight),
– good color reproduction/uniformity,
–
,
– durability,
– quick start at low temperature,
– long lifetime and high efficiency
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• How it works?
– A CCFL lamp is constructed from a sealed glass tube with an electrode on each end.
– The
inside
surface
of
the
tube
is
coated
with
a
phosphor
material
and
filled
with inert
gases
such
as
argon
(Ar)
and
neon
(Ne)
mixed
with
a slight
amount (approx. 4mg Hg per lamp) of mercury vapor (Hg).
– , the electrical current to flow.
– When ionized, the gas emits ultraviolet light that is converted to visible light as
it
strikes
the
phosphor
coating
on
the
inside
surface
of
the
bulb.
– The color of the visible light depends on the type of the gas and phosphor used. The figure depicts the construction of the CCFL bulb.
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• Fluorescent lamps and cold cathode fluorescent lamps have extremely similar constructions,
but
they
use
different types of electron discharge.
• Fluorescent lamps discharge electrons
throu h
a material
called an emitter by heating electrodes, while CCFLs dischar e electrons without
heating by
using
electrode.
• This is due to the '
electrode
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• What is HCFL?
– Hot Cathode Florescent Lamp
• zes n erna amen s a mus e ea e y an
external current
prior
to
lighting
by
a ballast
device,
similar
to the common fluorescent light used in the home.
• In this device, a gaseous mixture flows between two tungsten electrodes or filaments.
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Cold cathode fluorescent lamps Hot cathode fluorescent lamps
Lamp diameter 1.8
to
5.0
mm 15
to
32
mm
Starting voltage High Low
Tube current Low High
Luminous efficacy Low High
Lifetime up to
60,000
hours 3,000
to
15,000
hours
Tube can be made thinner Highly efficient
Longer lifetime Greater volume of light
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• There are 2 type of LED backlight – Ed e LED : Normall use white LED as LED source
– Full Array
LED
: Can
be
RGB
LED
or
white
LED
• RGB LED backlights – Demand color mixing technology in order to
overcome unevenness of luminance.
– Color mixin
has si nificantl
im roved
with
an
increased understanding of the design and function of direct backlight concept
•
– relatively low power consumption and
– high NTSC gamut
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• Color gamut is the range of color a display can reproduce and is commonly expressed as a
percentage of
NTSC.
• Although NTSC stands for National ,
which developed television standards for North America, in this
instance,
100%
of
NTSC
refers
to t e u range o co or t at can theoretically be displayed.
• CRTs is about 70% of NTSC. A
luminance and
a high
‐percentage
color gamut should provide the best image‐ reproduction capa ty.
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‐
•
– HD
–
• What
is
the
different
of
each
type? – Native resolution
– HD : 1366 x 768
– Full HD :
1920
x 1080
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•
– is the
difference
between
light
(white color) and dark (black color)
on a screen, expressed by a
number.
– The ability of automatically change
the darkest color (black) to
minimum in
order
to
create
the
real
darker image on screen
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•
– Standard Definition
–
• What
is
HD
? – High Definition
– Frame size of 1280 x 720
• What is
Full
HD
?
– High Definition
– Frame size of 1920 x 1080
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• What is Response Time? – Is a time required for Liquid Crystal to switch from ON to OFF or OFF to
ON
– Lower
• – Picture will become blur during movement scene
• to
LCD
TV
that
sold
at
store?
– Because all the LCD manufacture manage to process the image until it complete before display to screen
– This will cause picture lagging
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•
– is a technic
to
create
a smoother
images
by
.
• What is the purpose of Motion Flow
– v u u y y
moving scenes
–
lagging.
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• JVC calls their 100 Hz + technology "Clear Motion Drive" and
"Clear Motion Drive II 100 120HZ".
• LG calls their 100 Hz + technology "TruMotion".
• Mitsubishi calls their 100 Hz + technology "Smooth120Hz".
• " Plus“ and “Motion Rate”
• Son calls their 100 Hz + technolo "Motionflow".
• Toshiba calls their 100 Hz + technology "Clear Frame".
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•
– High‐Definition
Multimedia
Interface
–
transmitting uncompressed digital data
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What is HDMI Cable ?
Video cable : To carry composite video signal.Be able to support video display resolution signal upto 480p
ca e : o carry sgna .Contain 3 video cable. Every cable carry Y signal, R-Y signal and B-Y signal
Be able to su ort video dis la resolution si nal uto 1080i
HDMI cable : Be able to carry all type of video & audiosignal.
Be able to support video display resolution signal up
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What is advantage of HDMI
• ua ty: – Because HDMI is a digital interface, it provides the best quality of the
video since there are no loss analogue to digital conversions as arerequired for all analogue connections (such as component or S-video).
e erence s espec a y no cea e a g er reso u ons suc as
1080p.
• Ease-of-use: – HDMI combines video and multi-channel audio into a single cable,
• Intelligence: – -
(such as a DVD player) and the DTV,
– enabling new functionality such as automatic configuration and one-touch play.
• HD Content-Ready: – HDMI devices supporting HDCP have the comfort of knowing they will
have access to premium HD content now and in the future.
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HDMI with CEC
What is CEC ?
CEC : Customer Electronics Control
The channel:
Uses the industry standard AV LINK protocol
Used for remote control functions.. - .
This feature is used in two ways:
To allow the user to command and control multiple CEC-enabled boxes with one remote control.
To allow individual CEC-enabled boxes to command and control each other without user
.
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Back Ground of CEC
1 remote can
everything
Too many
remote
is a feature that enablesconnected devices to control
HDMI CEC is a upgraded version
each other over one wire.
of controlling multiple HDMI
devices
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HDMI with CEC
Pin 1 TMDS Data2
CEC
Pin 3 TMDS Data2
Pin 4 TMDS Data1Pin 5 TMDS Data1 Shield
Pin 6 TMDS Data1
Pin 7 TMDS Data0
Pin 8 TMDS Data0 Shield
Pin 9 TMDS Data0
Pin 10TMDS Clock
Pin 11 TMDS Clock Shield
Pin 12 TMDS Clock
Pin 13 CEC
Pin 14 Reserved (N.C. on device)
Pin 15 SCL
n
Pin 17 DDC/CEC GroundPin 18 +5 V Power
Pin 19 Hot Plug Detect
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HDMI with CEC
Does other manufactures support this CEC features?
■ All of the major TV makers support it, but they all call it
something different.
nyne +
TOSHIBA CE-LinkPANASONIC
EZ-Link
LG
SimpleLink
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HDMI with CEC
HDMI contains basic and enhanced features.
All the features added since version 1.1 are optional.
ere ore a g er vers on oes necessar y
mean enhanced features.
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HDMI with CEC
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HDCP – High-Bandwidth Digital Content Protection
-HDCP is a form of digital rights management developed by Intel to
control digital audio and video content as it travels across DVI or
HDMI connections.
-HDCP is proprietary and an implementation of HDCP requires a
license.
-In addition to paying fees, licensees agree to limit the capabilities
of their products. High-definition digital video content is restricted
- . -
is restricted to DAT quality on non-HDCP digital audio outputs
(analog audio outputs have no quality limits).
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HDCP – High-Bandwidth Digital Content Protection
-Licensees cannot allow their devices to make copies o content,
and must design their products to “effectively frustrate attempts todefeat the content protection requirements.”
-HDCP’s main target is to prevent transmission of non-encryptedhigh definition content. 3 systems were developed to achieve that
goal:
1. Authentication process disallows non-genuine devices toreceive HD content.
2. Encryption of the actual data sent over DVI or HDMI preventdropping of info.
.agreement easily been blocked from receiving HD data.
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DLNA – Digital Living Network Alliance
-
electronics, mobile and personal computer industries.
- It aim is to align the companies and have industry standards,which will allow products from all companies to be compatiblewith each other and to enable a network of electronic devices
in the home.
- In this way, consumers will be able to enjoy digital living easilyand seamlessly. Companies, under the alliance will still be ableto innovate and differentiate their own products.
- Some of the industry’s leaders, including Motorola, Philips,Samsung, Matsushita, Hewlett-Packard, Sony, Microsoft, Intel
, . ,however DLNA certification is available now.
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•
• Life time
• Comparison screen size CRT vs LCD
Note :
LCD6 : KDL
‐40EX520
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• What is Video Resolution ? – usually used to mean pixel dimensions, the number of
pixels in
each
dimension
(e.g.,
1366
x 768)
– Com are to CRT TV LCD have fix native ixel.
– If LCD display low resolution picture or video, it will automatically zoom the image or video to full fill the panel
size.
– And this will cause bad impact to picture quality.
• Video resolution for TV –
– 576i or 576p
– 720i or 720p
– 1080i or 1080p
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