Modul LCD LED Training-Day1

(1)

Display Device Training

p y

g

‐ LCD & LED

(2)

What do you know about LCD ?

• _{LCD TV}

_LCD TV

• _{Contrast Ratio}

• LED TV

• CCFL

Contrast Ratio

• Response Time

• Motion Flow

• CCFL

• _HCFL

• Motion Flow

• _HDMI

• SD

• HD

• CEC

• HDCP

• _Full HD

• Backlight

• _DLNA

• Hotel Mode

g

(3)

LCD & LED TV

• What is LCD ?

at s C ?

–

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

display picture instead of using Cathode Ray Tube

technology.

• What is LED TV?

What is LED TV?

–

Is a Display Device that using Liquid Crystal Display

technology with LED as a light source to display

i t

i t d f

i

C th d R

T b t h

l

(4)

LCD Construction

Backlight Panel Module

(5)

Backlight

• CCFL

CC

• HCFL

• LED

–

White

–

RGB

(6)

CCFL Backlight

• What is CCFL?

–

Cold Cathode Florescent Lamp

–

Is a lighting system that uses two phenomena:

• electron discharge & fluorescence.

• CCFL backlights have very good performance

properties which include:

–

good luminous intensity,

–

high density (compact and light weight),

–

good color reproduction/uniformity,

vibration/impact resistance

–

vibration/impact resistance,

–

durability,

–

quick start at low temperature,

–

long lifetime and high efficiency

(7)

CCFL Backlight

• 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).

When a high voltage is applied to the electrodes the gas is ionized allowing – When a high voltage is applied to the electrodes, the gas is ionized allowing 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.

(8)

CCFL vs Fluorescent lamps

• Fluorescent lamps and cold

cathode fluorescent lamps

have extremely similar

constructions, but they use

different types of electron

discharge.

• Fluorescent lamps discharge

electrons through a material

g

called an emitter by heating

electrodes, while CCFLs

discharge electrons without

g

heating by using electrode.

• This is due to the

construction of each lamp's

construction of each lamp s

electrode

(9)

HCFL Backlight

• _{What is HCFL?}

–

Hot Cathode Florescent Lamp

Utili

i t

l fil

t th t

t b h t d b

• _{Utilizes internal filaments that must be heated by 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.

(10)

Main differences between CCFL & HCFL

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 flux Low High

Luminous efficacy Low High

Lifetime up to 60,000 hours 3,000 to 15,000 hours

Strong points

Tube can be made thinner Highly efficient Strong points

(11)

(12)

LED Backlight

• There are 2 type of LED backlight

–

Edge LED : Normally use white LED as LED source

g

y

–

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 mixing has significantly improved with an

g

y

p

increased understanding of the design and function of

direct backlight concept

• White LED backlights

–

relatively low power consumption and

–

high NTSC gamut

(13)

NTSC Color Gamut

• 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

Television System Committee

Television System Committee,

which developed television

standards for North America, in

this instance, 100% of NTSC refers

h f ll

f

l

h

to the full range of color that can

theoretically be displayed.

• CRTs is about 70% of NTSC. A

display that can combine both high

luminance and a high‐percentage

color gamut should provide the

best image‐ reproduction

bili

capability.

(14)

LCD & LED TV ‐ type

LCD & LED TV type

• There are 2 type of LCD & LED TV

There are 2 type of LCD & LED TV

–

HD

Full HD

–

Full HD

• What is the different of each type?

–

Native resolution

–

HD

: 1366 x 768

–

Full HD : 1920 x 1080

(15)

Contrast Ratio

• What is Contrast Ratio?

What is Contrast Ratio?

–

is the difference between light

(white color) and dark (black color)

on a screen, expressed by a

number.

• What is Dynamic Contrast Ratio?

–

The ability of automatically change

the darkest color (black) to

(

)

minimum in order to create the real

darker image on screen

(16)

SD vs HD vs Full HD

• What is SD ?

What is SD ?

–

Standard Definition

Frame size of 480 or 576

–

Frame size of 480 or 576

• What is HD ?

–

High Definition

–

Frame size of 1280 x 720

• What is Full HD ?

–

High Definition

–

Frame size of 1920 x 1080

(17)

Response Time

• What is Response Time?

– Is a time required for Liquid Crystal to switch from ON to OFF or OFF to ON

• Which is better? Higher or Lower?

– Lower

• What is the effect if the response time is too higher?

– Picture will become blur during movement scene

• During introduction of LCD technology, why there are no blur effect

During introduction of LCD technology, why there are no blur effect

to LCD TV that sold at store?

– Because all the LCD manufacture manage to process the image until it complete before display to screen

(18)

Motion Flow

• What is Motion Flow?

What is Motion Flow?

–

is a technic to create a smoother images by

inserting new frames between standard frames

inserting new frames between standard frames.

• What is the purpose of Motion Flow

To improve picture quality and clarity in fast

–

To improve picture quality and clarity in fast

moving scenes

In order to reduce motion blur and picture

–

In order to reduce motion blur and picture

(19)

Motion Flow Terminology

• 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

".

• Samsung calls their 100 Hz + technology

Samsung calls their 100 Hz + technology

AMP

AMP Auto Motion

"

Auto Motion

Plus

“ and “

Motion Rate

”

• Sony calls their 100 Hz + technology "

Sony calls their 100 Hz technology

Motionflow

".

.

• Toshiba calls their 100 Hz + technology "

Clear Frame

".

(20)

HDMI & CEC

• What is HDMI ?

What is HDMI ?

–

High‐Definition Multimedia Interface

is a compact audio/video interface for

–

is a compact audio/video interface for

(21)

What is HDMI Cable ?

Video cable : To carry composite video signal.

Be able to support video display resolution signal up to 480p

DVD bl T YUV i l

DVD cable : To carry YUV signal.

Contain 3 video cable. Every cable carry Y signal, R-Y signal and B-Y signal Be able to support video display resolution signal uppp p y g p

to 1080i

HDMI cable : Be able to carry all type of video & audio

signal.

Be able to support video display resolution signal up to 1080p (Offer better detail and high picture quality) to 1080p (Offer better detail and high picture quality)

(22)

What is advantage of HDMI

Q lit

• Quality:

– Because HDMI is a digital interface, it provides the best quality of the video since there are no loss analogue to digital conversions as are required for all analogue connections (such as component or S-video).

Th diff i i ll ti bl t hi h l ti h

The difference is especially noticeable at higher resolutions such as 1080p.

• Ease-of-use:

– HDMI combines video and multi-channel audio into a single cable,

• Intelligence:

HDMI supports two way communication between the video source – HDMI supports two-way communication between the video source

(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.

(23)

HDMI

with

CEC

What is CEC ?

CEC : Customer Electronics Control

Consumer Electronics Control channel Consumer Electronics Control channel

The channel:

Uses the industry standard AV LINK protocol Used for remote control functions.

One wire. bidirectional serial bus One-wire bidirectional serial bus.

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

intervention intervention.

(24)

Back Ground of CEC

1 remote can control control everything Too many

remote

CEC

is a feature that enables

connected devices to control

HDMI CEC is a upgraded version of HDMI software that capable

each other over one wire.

of HDMI software that capable of controlling multiple HDMI devices

(25)

HDMI

with

CEC

Pin 1 TMDS Data2

Pin 2 TMDS Data2 Shield

CEC

Pin 2 TMDS Data2 Shield Pin 3 TMDS Data2

Pin 10 TMDS Clock

Pin 11 TMDS Clock Shield Pin 11 TMDS Clock Shield Pin 12 TMDS Clock

Pin 13 CEC

Pin 14 Reserved (N.C. on device) Pin 15 SCL

Pin 16 SDA Pin 16 SDA

Pin 17 DDC/CEC Ground Pin 18 +5 V Power

(26)

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

.

SAMSUNG  A

t+

SAMSUNG  Anynet+

TOSHIBA  CE-Link

PANASONIC

 EZ-Link

SONY

 BRAVIA Sync

SONY

 BRAVIA Sync

(27)

HDMI

with

CEC

HDMI contains basic and enhanced features.

All the features added since version 1.1 are optional.

Th

f

hi h

i

d

NOT

il

Therefore a higher version does NOT necessarily

mean enhanced features.

(28)

(29)

CEC Features

One Touch Play

When the user starts playback with DVD/HDD recorder or p y

DVD player which is connected to TV, TV powers on if powered off and changes the external input for the active device.

All Off

When TV is powered off, AV amp, DVD/HDD recorder or DVD player, which are connected to TV, are power off correspondingly.

Synchronized operation with AV amp

which are connected to TV, are power off correspondingly.

When AV amp is used, TV Speaker will OFF and, sound only coming

(30)

HDCP –

H

igh-Bandwidth

D

igital

C

ontent

P

rotection

-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 to DVD quality on non HDCP video outputs DVD Audio content to DVD quality on non-HDCP video outputs. DVD-Audio content is restricted to DAT quality on non-HDCP digital audio outputs (analog audio outputs have no quality limits).

(31)

f

HDCP –

H

igh-Bandwidth

D

igital

C

ontent

P

rotection

-Licensees cannot allow their devices to make copies of content, and must design their products to “effectively frustrate attempts to defeat the content protection requirements.”

-HDCP’s main target is to prevent transmission of non-encrypted high definition content. 3 systems were developed to achieve that goal:

1. Authentication process disallows non-genuine devices to receive HD content.

2. Encryption of the actual data sent over DVI or HDMI prevent dropping of info.

3 Key revocation procedures ensures violation of license 3. Key revocation procedures ensures violation of license

(32)

DLNA –

D

igital

L

iving

N

etwork

A

lliance

DLNA is an alliance of leading companies in the consumer - DLNA is an alliance of leading companies in the consumer

electronics, mobile and personal computer industries.

- It aim is to align the companies and have industry standards, g p y which will allow products from all companies to be compatible with each other and to enable a network of electronic devices in the home.

- In this way, consumers will be able to enjoy digital living easily and seamlessly. Companies, under the alliance will still be able to innovate and differentiate their own products.

- Some of the industry’s leaders, including Motorola, Philips, Samsung, Matsushita, Hewlett-Packard, Sony, Microsoft, Intel and Nokia have joined the alliance It is still in its early stages and Nokia, have joined the alliance. It is still in its early stages, however DLNA certification is available now.