Vixlim CRT Quality/Service

Training Material

Samsung Electronics

Co., Ltd

April 30, 2006.

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Table of Order

1. Comparison between displays

2. Development background of Slim CRT

3. CRT Structure

4. Operation principle of CRT product

5. Market defect status of SlimFit

6. Improvement of market defect of SlimFit

7. SlimFit CRT Service material

8. Performance of Slim TV in the overseas market

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1. Comparison between different display method

1) General

With drastically increased income, customer’s need for displaying gadget has become

diverse since the generalization of color TV, following black and white TV.

Especially, the success of PDP, LCD and DLP which solved TV’s limitation, hugeness, has

brought Renaissance of display product.

Each display method has its strong and weak points and many efforts are aimed at

improving weak points.

Unlike the time when there were only CRT TVs, customers now have broader choice and

have higher expectation. Sometimes various options can be even confusing. For this

reason, comparing different type of display can help general understanding before looking

into CRT TV.

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2) Comparison between display product

The quality of CRT TV, PDP and LCD products has become dramatically higher since their

launching. The comparison will be made based on the present condition, not considering

different time of release.

Braun TVs are distinct from others by their inexpensive price. However, Braun TVs are

heavy. Also purity and image can be easily affected by geomagnetic field.

LCD TVs are thin and leave more space. However they are expensive and imperfect in the

aspects of gradation stain, response property and viewing angle.

PDP’s hugeness can be appealing to the customers but high power consumption and price

are the limitations. DLP is relatively inexpensive for its size, but still have the problem of lamp

life.

Many companies are putting enormous effort in reducing these limitations and make products

more satisfactory to the customers.

Every display product is under the continuous progress to meet higher expectation of

customers.

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CRT LCD PDP DLP

Perceived

picture

quality

Contrast

(Dark

room)

Almost infinite 5,000:1 3,200:1 1,500:1

Viewing

angle Free 170˚ Free 160 ˚

Power

consumpti

on

160W

(32”)

285W

(40”)

330W

(42”)

230W

(50”)

Response

speed 20 ㎲ 8~25 ms 20 ㎲ 20 ㎲

Strength Medium in

size/low price Thin Thin Large and low price

Weakness

- Heavy

- Limited size

- Geomagnetic

field

-Expensive

-Viewing angle

- Afterimage

-Expensive

-Reflection from

the surface

-False image

-Power

consumption

-Lamp life

-Thickness

-Viewing angle

Analysis Display Device

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2. Birth of Slim CRT

Response to the trend for

slimmer display

vixlim

2004

1931

1950

1997

Dynaflat

Flat

Slim

Color

Black and

white

Evolution of Braun Tube Satisfying Customer’s Needs

2%

7%

22%

22%

47% Price

Design

Quality

After Service

Feature/Others

• What the customer’s consider when

purchasing a TV

Low price, huge, Wide TV

Design Picture Quality

Slim

Price

CRT

LCD

PJT

7/32

Space Effectiveness

SET depth reduced 34% compared to existing CRT, gaining the

same space efficiency as LCD

600mm

CRT Vixlim LCD

396mm 330mm

8/32

Victory + Slim

What is Vixlim?

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Braun Tube (Cathode Ray Tube:CRT) : A vacuum tube which transforms electric signals

into optical images such as shape and letter by electric beams. Braun tube was named

after the inventor Karl F. Braun and generally called CRT (Cathode Ray Tube)

Excellent in luminance, viewing angle, cost and contrast

3. CRT Composition

* PCM (PURITY CONVERGENCE

MAGNET)

- Magnet for adjusting the dynamic

performance of CRT

* PANEL

(Front glass)

* FUNNEL (Rear glass)

* Electron Gun

* SHADOW

MASK

* Phosphor

(R/G/B)

* BANDING

(Fixatopm)

* DY (DEFLECTION YOKE)

* Electron Beam

Shadow Mask guides a beam to reach an object

(phosphor) correctly

There are several types of Shadow Mask and

phosphor applied. Each of them have different

property.

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* Electron Gun : Creates and emits electron

* D.Y(Deflection Yoke) : Deflects the electron beams.

* Funnel Glass : Rear glass

* Band : Anti-detonation band

* Panel Glass : Front glass

* Shadow Mask : Sort the electric beams of three different colors to make them

reach the right place on the panel

• Phosphor : Material which emits visible rays. For color CRT, three

phosphors of red, green and blue are used.

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1) Electron gun produces image. It varies the amount of electron beam according to the electric signal of three primary colors, red, green and blue

2) Light will come out when the electrons pass through the shadow mask.

Shadow mask is an iron plate with thickness of 0.15mm, placed in front of the phosphor about

10mm ahead. This plate has holes with the diameter of around 0.3㎜. Electron beams from an

electron gun pass through this hole and collides onto the dots on the phosphoric surface and

radiate red, green and blue.

4. Operation Principle of CRT products

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3) The light on the phosphoric surface is visible

R,G,B dots arranged on the glass surface in a Braun tube.

형

광

면

에

부

딪

치

는

빛

을

보

게

된

다

.

브

라

운

관

안

의

유

리

면

에

R

.

G

.

B

돗

트

가

연

속

적

으

로

배

열

되

어

있

다

.

electron gun

electron beam

pixel scan line

1TV-field

4) Image is made by scanning

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As the surface of general Braun tube is bulged out,

① Display is distorted

② Total flat Braun tube completely flat surface without curve and causes less eyestrain.

5) Comparison between general Braun tube and total flat Braun tube

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Flatter surface cause less

distortion.

Formula : Flatness (R) = Radius of curvature ÷ Size of screen ÷

1.76(coefficient)

名品 Ultra Flat : 2.5R = 2,992 ÷ 680 ÷ 1.76

Existing Super Flat : 2.0R = 2,450 ÷ 680 ÷ 1.76

名品 Total Flat : Infinite R (Infinite flatness, complete flat)

Calculating the flatness of Braun tub

15/32

6) Deflection Principle

There are several ways of deflecting electron beam and the one uses magnetic field is called

electric deflection. In this method, coil is placed where the electron beams pass through, to form a

uniform magnetic field. This magnetic field lead the electrons to different route as in Fleming’s left

hand rule.

This is the basic principle of Braun CRT deflection.

Electron Deflection

Principle

Fieming’s Left hand rule

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* One of the problems in deflection is G/D property

- Geometrical Distortion (Item : NS distortion, EW distortion)

- Cause

As the screens (inside of the panel) become flatter and slimmer, the curvature center of the

screen does not coincide with the deflection center of DY

Due to this, the three electron beams which focused to the center are diverted and crossed.

NS distortion EW distortion

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• Strength

– High visibility (High contrast, high luminance)

– Full color displays

– High response speed

– High definition

– High reliability

– Low price

• Weakness

– Inconvenient to handle due to large volume and heavy weight

– Convergence defect (Unbalance between R. G. B)

– Deterioration of resolution around the center, different dot size in and around the center.

– Doming : Color change (when the route of beam is changed due to the heat expansion of shadow mask).

– Purity (Color stain)

– Moire (Interruption between scan line and mask pitch)

– Distortion around the center

– Flicker

– Operation in high voltage(∼30kV)

7) Property of CRT

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5. SlimFit Market Defect Status

S62A CR compared to the previous chassis (CR % from introduction of chassis)

0.000.47

1.22

2.72

4.16

4.76

6.23

7.16

8.34

9.55

10.37

0.00 0.130.34

0.831.02 0.92 0.82 0.96

1.28

1.782.19

0.00

2.00

4.00

6.00

8.00

10.00

12.00

I+0 I+1 I+2 I+3 I+4 I+5 I+6 I+7 I+8 I+9 I+10

%

S62A CR

S61A CR

1. Example) Market defect status of OZ (S62A) 32” in Europe

▶ Appropriate action must be taken against the market

defect [10.37%] Immediately.

( Not only in Europe, but in every subsidiary)

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Detailed Analysis

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Ra

nk

Defect No. of

Defect Defect

Rate

Note

1

CRT

(58.1%)

EW 379 25.8%

2 NS 246 16.8%

3 Cg,WU 202 13.8%

4 Noise 26 0.02%

5 Electrical

(24.7%)

Resistance 275 18.7%

6 Semiconductor 87 0.06%

7 Component Remocon 122 0.08%

8 Workmanship Soldering 60 0.04%

9 Others 71 0.05% Total 1468 units

<< OZ (S62A) 32” Detailed Defect Status >>

Detailed Analysis

- CRT dominates 58.1% of defects

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NON PF NEW PF

Horizontal

Coil

Vertical

Coil

6-1) G/D (NS,E/W) Improvement

◆ NS Pin Free CRT Development ----- Implemented in every subsidiary

from September 2005 to April 2006

▶ Description : Shape of horizontal coil (1) and length of neck area (2),

Shape of vertical coil (3)

1

2

3

6. Improvement status of

Each SlimFit Defect Case

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<<. NON Pin Free >>

<< NEW Pin Free >>

4.5mm(NS)

6.0mm(1/2NS) - Corrected circuit to NS 4.5mm, 1/2NS 6.0mm in DY

(Over ½ NS 2.4mm)

※ High dispersion of DY and circuit correction –

low quality

Under 2.0mm(1/2NS) - 1/2NS 1.7mm without correcting

NS circuit in chassis

※ Improved quality by improving absolute

quantity of NS and reducing dispersion

▶ G/D Improvement result (1/2NS) : 2.4 → 1.7mm (NEW PIN FREE)

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Coil 지지

◆ Corrective action to prevent DY from hanging down -----

Applied in every subsidiary by April 2006

◆ Effect

High NS reliability during aging or long

display in high temperature

◆ Action detail

- Placed an inlay an the neck to support

the weight of DY

- A wedge on the top supports DY coil

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Dynamic Lens Design

Optimum triode property

NEW PF

Electron beam

Cg-drift improvement

Dynamic performance improvement

Optimum aspect ratio/ improved Cg-drift

■ Cg Drift Improvement 2.5mm → 0.7mm Improved Cg and picture quality

Aspects NON PF NEW PF Note

Xh

difference

(mm)

Center 0.41 0.19 0.22mm improve

Outer

side 1.05 0.45 0.6mm improve

2-2) Cg Improvement ----- Applied in every subsidiary by April 2006

CXO G6 Big calibration

CXO G5 Big calibration

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Aspect NON PF NEW PF

3D shpae

Plan figure

◆ Change in shape and opening width → Improved the amount of

geomagnetic field movement

Opening width

E/W move N/S move

Before I/S 34um 35um

After I/S 28um 5um

▶ Improvement

- E/W move : 6um ( 18 %)

- N/S move : 30um ( 86 %)

2-3) Purity Improvement ---- Applied to every subsidiary by April 2006

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◆ Countermeasure against DY drooping -----

Applied to every subsidiary by April 2006

Improved Landing change ( 16um ~ 20um )

◆ Change of DY tightening tension 15Kg/㎠ 25Kg/㎠

Reduced Landing change by preventing DY from slipping

◆ Improved landing by re-designing of new CatchMe

▷ Around the Ball Point considering stability in

high temperature

Adjusted the lens from13um 26.3㎛

10 4 - 133 14 - 7 02 16 - 10 - 18 19 - 7 024 4 - 10

27/32

2-4) Noise

■ Symptom : “zing“ sound when turing on the power

■ Cause : The electricity flow during the initial D-Coil operation causes vibration

of D-coil and the friction between D-coil and cabinet produces the noise

■ Measure : Enough mechanical distance by changing top D-Coil Clamp

type

Before After

Top

clamp

28/32

◆ CRT Noise Improvement

- Measured in 20cm’s distance from DY Core, at 45 degree

Overall noise : New Pin Free 5.56dB improvement team --

Applied to every subsidiary by April 20066.04

( Non Pin Free 37.51dB / New Pin Free 31.95dB )

- Fundamental Improvement Plan

Promote new DY when developing Vixlim 2 CRT -- June. 2006.

Description : Removed PCS Coil

Improvement goal : 32” Normal Falt level

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7.Performance of Slim TV in the overseas market

– Change of status in the market( Flat )

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SlimFit ranked no. 1 in Sales

Continuous increase of API

in the developed market

0

2

4

6

8

10

12

Apr May Jun Jul Aug’05.4 ’05.5 ’05.6 ’05.7 ’05.8

(%)

32PW8620

WS32Z308P

[GfK / Sales Amounts]

0

5

10

15

20

25

30

35

Apr May Jun Jul Aug

[NPD / 30W Flat Market] (%)

TX-R3079

30HS420

32” Digital Flat M/S 1位

CRT 32” groups ranked M/S no. 1

91

123 118

115

92 100 115

175

2003 2004 2005 2006

Slim introduction

Flat 32” API outgrew SONY

Expected to achieve the same API as

SONY DTV (’06)

Slim spread

86

99 107 102

102

95

101

112 119 117

Developed the world’s first Slim CPT (32”&29”) and early spread

Curved EOL

Change of Stuats ( Flat )

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The U.S : Samsung’s product was sold the most among Flat D-TV products

(Outsold long time winner Sony]

Became no. 1 in June and remained no. 1 for 4 consecutive months until September

-

2,000

4,000

6,000

8,000

10,000

12,000

1月 2月 3月 4月 5月 6月

Sony

Samsung

Philips

Toshiba

Panasonic

JVC

LG

[ 32”WF Sales status (Source : NPD Intelect June) ]

Change of Status ( Flat )

32/32

□ Sales dramatically rise in European market

- Expected to go up over 250% from last year

in the U.K, Germany and France

32”WF CRT M/S ranked no. 1 in sales within just 2 month of debut in

Germany (January 2005 : no. 10)

- Shortage in Eastern Europe (eg, Hungary) due to soaring demand

□ Sold all over the world including South America/Russia/China/

South America

[Road show in South East Asia]

[Road Show in South America)

[Russia]

Change of Status in developed country ( Flat )