Vixlim CRT Quality/Service TrainiVixlim CRT Quality/Service Training Materialng Material

Samsung Electronics Samsung Electronics Co., LtdCo., Ltd

April 30, 2006. April 30, 2006.

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Table of OrderTable 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 method1. 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 lau

nching. 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 consum

ption

160W(32”)

285W(40”)

330W(42”)

230W(50”)

Response

speed20 ㎲ 8~25 ms 20 ㎲ 20 ㎲

StrengthMedium in

size/low priceThin 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 Analysis Display Device Analysis Display Device Analysis Display Device

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2. Birth of Slim CRT 2. Birth of Slim CRT

Response to the trend for slimmer display

vixlimvixlim

20042004

19319311

19501950

19971997

Dynaflat

FlatFlat

SlimSlim

ColorColor

Black Black and and

whitewhite

Evolution of Braun TubeEvolution of Braun TubeEvolution of Braun TubeEvolution of Braun TubeSatisfying Customer’s NeedsSatisfying Customer’s NeedsSatisfying Customer’s NeedsSatisfying Customer’s Needs

2%

7%

22%

22%

47%PricePrice

DesignDesign

QualityQuality

After Service

Feature/Others

• What the customer’s consider when What the customer’s consider when purchasing a TVpurchasing a TV• What the customer’s consider when What the customer’s consider when purchasing a TVpurchasing a TV

Low price, huge, Wide TV

DesignDesign Picture QualityPicture QualitySlimSlim

PricePrice

CRT

LCD

PJT

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Space EffectivenessSpace EffectivenessSpace EffectivenessSpace Effectiveness

SET depth reduced 34% compared to existing CRT, gaining the same space efficiency as LCD

600mm

CRT Vixlim LCD

396mm 330mm

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Victory + SlimVictory + SlimVictory + SlimVictory + Slim

What is Vixlim?What is Vixlim?What is Vixlim?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 Composition3. 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 products4. 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.

형광면에 부딪치는 빛을 보게된다.

브라운관안의 유리면에 R.G.B돗트가 연속적으로 배열되어 있다.

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

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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 distortionEW 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 s

hadow 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 Status5. 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 0.13 0.340.83 1.02 0.92 0.82 0.96

1.281.78

2.19

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 AnalysisDetailed AnalysisDetailed AnalysisDetailed Analysis

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Rank

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 AnalysisDetailed AnalysisDetailed AnalysisDetailed 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 6. Improvement status of Each SlimFit Defect Case 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 Coil 지지지지

◆ 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

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

differen

ce

(mm)

Cente

r 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

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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

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◆ 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 market7.Performance of Slim TV in the overseas market – Change of status in the market( Flat )

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SlimFit ranked no. 1 in SalesSlimFit ranked no. 1 in Sales

Continuous increase of API in the developed market

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

123118 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

112119 117

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

CurvedEOL

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 )

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□ 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 )