Cosmetic Outgoing Inspection Specification (TFT-LCD, Notebook Model) Acer Samsung I.K. Namkung Sr. Manager. LCD CS Team LCD CS Team Samsung Electronics Address : 330-300, SAMSUNG ELECTRONICS CO.,LTD. #510 Sungsung-Dong, Cheonan-City, Chung-Nam, Korea Tel. 82-41-529-7519
Revision History Date Revision No. Revised by Summary May.09. 07 Y2007_rev.00 Junie. Lee Original document May.23. 08 Y2008_rev.01 Martin Cho Revised as blue word parts Delete Fig. 2 * Will be not considered the distance between bright dot & dark dot. Delete Fig. 3 * Bright spot and line are judged as dot definition Address : 330-300, SAMSUNG ELECTRONICS CO.,LTD. #510 Sungsung-Dong, Cheonan-City, Chung-Nam, Korea Tel. 82-41-529-7519
Outgoing Inspection Criteria 1. Inspection Introduction 1.1. Conditions viewing distance 30 ~ 50 cm ambient illumination 300 ~ 700 Lux (nominal 500 Lux) ambient temperature 25 + 2 'C Humidity 65± 10% viewing angle Viewing angle shall be 45 horizontal, and +15(up), -35(down) vertical. display pattern R, G, B, Black, White inspection area Active area viewing angle definition 1.2. Method of sampling inspection 1) Lot size : Quantity of per delivery for inspection per module 2) Sampling type : Normal inspection, Single sampling 3) Inspection Level : Level II 4) Sampling table : MIL-STD-105E 5) Sampling size : AQL(%) : 0.65 for major defect AQL(%) : 1.5 for minor defect L C D Observer Viewing angle Center of the panel
Outgoing Inspection Criteria 1. Inspection Introduction 1.3. Defect Modes dark / bright spots points on the display which appear dark / bright and remain unchanged in size dark / bright lines lines on the display which appear dark / bright and remain unchanged in size polarizer scratch when the unit is lit a light, line is seen across a darker background; line does not vary in size polarizer dent when the unit is lit a light, light(white) spots appear against a darker background, and do not vary in size bright/dark dot a sub-pixel (R, G, B dot) stuck off / on
2. Mechanical Inspection Chassis Gap max. 0.5mm Silicone Gasket (Glue) silicone material shall not be exposed beyond the metal frame edge into the view area * If there is none identified criteria in this specification, Samsung will refer production specification that Customer and Samsung agreed. * If there is mechanical dimension issue which has no designated tolerance, Samsung will apply natural tolerance. * No obvious cosmetic defects on the mechanical parts are allowed, such as illegible label, rusty connector, gap caused by incomplete assembly, and so on.
3. Visual Inspection Defect Type Dark / bright spot (foreign material,Stain,Dust) Bright line (light lint), or dark line (dark lint / hair) Polarizer scratch Maximum allowable number of defects 0.01 ≤ W ≤0.1 0.3 ≤ L ≤ 2.0 N ≤ 3 D W L 0.01 ≤ W ≤ 0.1 0.3 ≤ L ≤ 3.0 Polarizer dent/bubble Count (mm) 0.2 ≤ D ≤ 0.4 N ≤ 5 D ≤ 0.4 Reject (mm) D > 0.4 N > 3 W > 0.1 L > 2.0 L >3.0 N > 5 [ D : diameter, W : width, L : length, N : count ] Mura If customer claim mura issue , will according to mura status to set up limit sample Light leakage If customer claim light leakage , will according to light leakage status to set up limit sample.
4. Electrical Inspection Defect Type Accept Reject Bright dot Random (Green=0) N ≤ 2 N > 2 two adjacent Not allowed Dark dot random N ≤ 3 N > 3 two adjacent (Fig. 1) N ≤ 1 N > 1 three or more adjacent Not allowed Maximum allowable number of dot defect N ≤ 4 N > 4 Minimum distance between defects, (Fig. 2) bright dot - to - bright dot bright dot - to - dark dot dark dot - to - dark dot L ≥ 20 mm L < 20 mm L < 20 mm [ L : length, N : count ] Definitions/ Notes; - A bright dot any Red, Green, or Blue pixel suck in the “On” mode. A dark dot any Red, Green, or Blue pixel suck in the “Off ” mode. Inspection pattern for electrical defect should be pure R, G, B, Black and White. Adjacent two & three dots in horizontal direction will be considered as one dot * No bright dot rate (2007 : ≥ 90%, 2008: ≥ 92%, 2009 ≥ 95% * SEC count ZBD potion by monthly and separate by size.
Fig. 1. Dark dot defect description 【two adjacent】 Good N = 1 ea Good N = 1 ea NG - Good N = 2 ea Good N = 2 ea Good N = 2 ea NG - ( Good ) ( NG ) * Adjacent two dots in horizontal direction will be considered as one dot
Fig. 2. Minimum distance between dot defects 【bright dot - to - bright dot】 20 mm Good 19.9 mm N. G 【bright dot - to - dark dot】 20 mm Good 19.9 mm N. G 【dark dot - to - dark dot】 19.9 mm N. G 20 mm * Adjacent two & three dots in horizontal direction will be considered as one dot. * Minimum distance criteria is applied to the defect , which are not defined as adjacent dot(two or three) in the spec. * Will be not considered the distance between bright spot & dark spot. * Will be not considered the distance between dot & mechanical defect. * Will be not considered the distance of bubble and dent.
Fig. 3. Bright dot defect description . A sub-pixel (R, G, B dot) stuck on . When the brightness of green and red is above 16gray, we judge bright dot . When the brightness of blue is above 28gray, we judge bright dot <Example of phenomenon > Criterion 16gray Criterion 28gray