Datasheet

DEM 320240M TMH-PW-N Production Specification

Version: 1.1 PAGE: 16

11. INSPECTION CRITERION

11.1 Description

This specification is made to be used as the standard acceptance/rejection criteria for TFT LCM Product.

1.Sample plan

Sampling plan according to GB/T2828.1-2003/ISO 2859-1：1999 and ANSI/ASQC Z1.4-1993, normal

level 2 and based on:

Major defect: AQL 0.65

Minor defect: AQL 1.5

2. Inspection condition

lViewing distance for cosmetic inspection is about 30±5cm with bare eyes, and under an environment

600~1000lux for visual inspection and 0~200lux for function test., all directions for inspecting the sample

should be within 45°against perpendicular line. (Normal temperature 18~28°C and normal humidity

60±15%RH).

l Driving voltage

The Vop value from which the most optical contrast can be obtained near the specified Vop in the

specification (Within ±0.5V of the typical value at 25°C.).

3. Definition of inspection zone in LCD

Zone A: character/Digit area

Zone B: viewing area except Zone A (Zone A+Zone B=minimum Viewing area)

Zone C: Outside viewing area (invisible area after assembly in customer’s product)

Fig.1 Inspection zones in an LCD.

Note: As a general rule, visual defects in Zone C are permissible, when it is no trouble for quality and

assembly of customer’s product.

11.2 Inspection criterion

11.2.1 Function defect

Items to be

inspected

Inspection criterion

Classification

of defects

All functional

defects

1) No display

2) Display abnormally

3) Missing vertical，horizontal segment

4) Short circuit

5) Back-light no lighting, flickering and abnormal lighting.

6) obvious striation

7) Current beyond specification value

Missing

Missing component

Outline dimension

Overall outline dimension exceed the drawing is not allowed.