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Vixlim CRT Quality/Service Training Material

Vixlim CRT Quality/Service Training Material. April 30, 2006. Samsung Electronics Co., Ltd. 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

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Vixlim CRT Quality/Service Training Material

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  1. Vixlim CRT Quality/Service Training Material April 30, 2006. Samsung Electronics Co., Ltd

  2. 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

  3. 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.

  4. 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.

  5. Analysis Display Device

  6. Satisfying Customer’s Needs Evolution of Braun Tube Price CRT PJT Slim Picture Quality Design LCD 2. Birth of Slim CRT • Low price, huge, Wide TV • Response to the trend for slimmer display 2004 Price 47% Design 22% 1997 Quality 22% 1950 Slim 1931 After Service 7% Flat Feature/Others Color 2% vixlim Black and white Dynaflat • What the customer’s consider when purchasing a TV

  7. Space Effectiveness • SET depth reduced 34% compared to existing CRT, gaining the same space efficiency as LCD CRT Vixlim LCD 396mm 330mm 600mm

  8. What is Vixlim? Victory + Slim Victory + Slim

  9. 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 * Electron Beam * Electron Gun * PANEL (Front glass) * SHADOW MASK * Phosphor (R/G/B) • 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. * BANDING (Fixatopm) * FUNNEL (Rear glass) * DY (DEFLECTION YOKE) * PCM (PURITY CONVERGENCE MAGNET) - Magnet for adjusting the dynamic performance of CRT

  10. * 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.

  11. 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 4. Operation Principle of CRT products 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.

  12. 형광면에 부딪치는 빛을 보게된다. 브라운관안의 유리면에 R.G.B돗트가 연속적으로 배열되어 있다. electron beam electron gun 1TV-field scan line pixel 3) The light on the phosphoric surface is visible R,G,B dots arranged on the glass surface in a Braun tube. 4) Image is made by scanning

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

  14. Flatter surface cause less distortion. Calculating the flatness of Braun tub 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)

  15. 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. Fieming’s Left hand rule Electron Deflection Principle

  16. * 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

  17. 7) Property of CRT 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)

  18. 5. SlimFit Market Defect Status 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)

  19. Detailed Analysis

  20. Detailed Analysis << OZ (S62A) 32” Detailed Defect Status >> - CRT dominates 58.1% of defects

  21. 6. Improvement status of Each SlimFit Defect Case 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) 2 1 3

  22. 4.5mm(NS) 6.0mm(1/2NS) ▶ G/D Improvement result (1/2NS) : 2.4 → 1.7mm (NEW PIN FREE) <<. NON Pin Free >> - 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 << NEW Pin Free >> 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

  23. Coil 지지 ◆Corrective action to prevent DY from hanging down ----- Applied in every subsidiary by April 2006 ◆ Action detail - Placed an inlay an the neck to support the weight of DY - A wedge on the top supports DY coil ◆ Effect High NS reliability during aging or long display in high temperature

  24. 2-2) Cg Improvement ----- Applied in every subsidiary by April 2006 ■ Cg Drift Improvement 2.5mm → 0.7mm Improved Cg and picture quality CXO G6 Big calibration Optimum aspect ratio/ improved Cg-drift CXO G5 Big calibration NEW PF Electron beam Cg-drift improvement Dynamic Lens Design Dynamic performance improvement Optimum triode property

  25. 2-3) Purity Improvement ---- Applied to every subsidiary by April 2006 ◆ Change in shape and opening width → Improved the amount of geomagnetic field movement ▶ Improvement - E/W move : 6um ( 18 %) - N/S move : 30um ( 86 %) Opening width

  26. ◆ 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㎛

  27. 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

  28. ◆ 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

  29. 7.Performance of Slim TV in the overseas market–Change of status in the market( Flat )

  30. SlimFit ranked no. 1 in Sales Continuous increase of API in the developed market Change of Stuats ( Flat ) Expected to achieve the same API as SONY DTV (’06) 32” Digital Flat M/S 1位 175 [NPD / 30W Flat Market] (%) Slim introduction Curved EOL Slim spread TX-R3079 123 118 115 30HS420 91 100 92 115 2003 2004 2005 2006 Flat 32” API outgrew SONY CRT 32” groups ranked M/S no. 1 119 117 (%) 112 [GfK / Sales Amounts] 102 101 WS32Z308P 102 107 99 95 86 32PW8620 ’05.8 ’05.4 ’05.5 ’05.6 ’05.7 Developed the world’s first Slim CPT (32”&29”) and early spread

  31. Change of Status ( Flat ) 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 [ 32”WF Sales status (Source : NPD Intelect June) ]

  32. Change of Status in developed country ( Flat ) □ 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]

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