40inch LCD_Samsumg Panel Bad Dot IIS_20120307

8/2/2019 40inch LCD_Samsumg Panel Bad Dot IIS_20120307

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Cosmetic Outgoing Inspection Specification 1998. Rev. 01 ( 98-03-26 ) 1Cosmetic Outgoing Inspection Specification 2001. Rev. 00 ( 01-02-19 ) 1

Address : San 24 Nongseo-Lee, Kihung-Eup, Yongin Si, Kyungki-Do, Korea

LCD CS GROUP

AMLCD DIVISION

Customer

Cosmetic Outgoing Inspection Specification

Samsung

I.K. NamKung

Sr. Manager. LCD CS Group




1.1 Outgoing Inspection Plan

1.1.1 Sampling Plan

1.1.2 Flow Chart

1. Outgoing Inspection

+ Sample size : 40 %

One lot is made up of ten panels for this model.

* j : Quantity of failed LCDs

Sampling Inspection

(Sample size : 40%)

Outgoing

Failure

*j = 0

No

Yes

Full Inspection

of the LOT

Replacement

of the Failure

Inspection of

the Replacement

Failure

*j = 0

No

Yes




1.2 Outgoing Inspection Criteria

1.2.1 Inspection Introduction

1.2.1.1 Conditions

viewing distance 30 ~ 50 cm

ambient illumination 300 ~ 700 Lux (nominal 500 Lux)

ambient temperature 25 + - 3 'C

viewing angle The surface of the module and the inspector's

line of view shall be at 90 degrees.

display pattern R, G, B, Black, White

inspection area active area

1.2.1.2 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 scratchwhen 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




Definitions / Notes;

- All uniformity defect which could not found on RED, GREEN, BULE will be allowed.

- 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.

1.2.2. Visual Inspection

Defect Type

Dark / bright spot

(foreign material,Stain,Dust)

Bright line (light lint), or dark line (dark lint / hair) &Polarizer scratch

Maximum allowablenumber of defects

D

[ D : diameter, W : width, L : length, N : count ]

W

L

W <= 0.2

L <= 7.0

N <= 4

Polarizer dent/bubble

Count (mm)

N <= 10

D <= 1.0

N <= 6D

Reject (mm)

W > 0.2

L >7.0

D > 1.0

N > 10

Light Leakage

B/L Mold Broken

Top-chassis Gap

Allow Top-chassis Light leakage / Bright & Dark lines

L <= 5

L <= 1.0

B/L Stain D <= 10.0

B/L Sheet Wrinkle & Pol Misalign

Check only at 90 degrees viewing angle

Pol burn Allow Pol burn in B/M area

L > 5

L > 1.0

D > 10.0

D <= 1.0N <= 6

D > 1.0




Defect Type Accept Reject

1.2.3 Electrical Inspection

Dark dot

N > 6N <= 6

three adjacent

random

two adjacent N <= 2 N > 2

[ L : length, N : count ]

Maximum allowable number of dot defect N <= 10 N > 10

N > 1N <= 1

four or more adjacent Not allowed

Bright(High) dot

N <= 5 (2) N > 5 (2) Random (Green)

Two adjacent N > 2N <= 2

Three or more adjacent Not allowed

Definitions / Notes;

- Will be not considered the distance between defects.

- 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




【two adjacent】

Fig. 1. Bright dot defect description

( Good ) ( NG )

Good

N = 1 ea

Good

N = 1 ea

Good

N = 1 ea

* Adjacent two dots in horizontal direction will be considered as one dot

Good

N = 2 ea

Good

N = 2 ea

Good

N = 2 ea

Good

N = 2 ea




【two adjacent】

Fig. 2. Dark dot defect description

( Good ) ( NG )

Good

N = 1 ea

Good

N = 1 ea

Good

N = 1 ea

Good

N = 2 ea

Good

N = 2 ea

Good

N = 2 ea

Good

N = 2 ea

* Adjacent two dots in horizontal direction will be considered as one dot




Fig. 2. Dark dot defect description

【three adjacent】

GoodN = 1 ea

GoodN = 1 ea

GoodN = 1ea

( Good ) ( NG )

GoodN = 3 ea

GoodN = 3 ea

GoodN = 3 ea

GoodN = 3 ea

* Adjacent three dots in horizontal direction will be considered as one dot

Good

N = 2 ea

Good

N = 2 ea

Good

N = 2 ea

Good

N = 2 ea

Documents

40inch LCD_Samsumg Panel Bad Dot IIS_20120307