Table 5-1. TFT LCD Guidelines (14.1/15.0-in XGA)

Type of Imperfection

Electrical Imperfections:

Bright dots (a)

Dark dots (a)

Imperfections Not Allowed

7 or more single bright dots.

7 or more single dark dots.

9 or more total (bright and dark combined) defective dots.

Any occurrence of multiple defective dots within 15 mm.

Mechanical Imperfections:

Any polarizer bubble, discoloration, or dent that is visible from at least

Discoloration

36 cm (14 in).

Polarizer bubbles, dents (b)

 

Definitions of imperfections:

 

a

b

A bright or dark dot is a subpixel (red, green, or blue dot) that is stuck on or off.

A polarizer dent or bubble is a light spot with a darker border that appears on a lighted display and does not change size. In contrast, a polarizer scratch is a light line that is visible on a darker background and does not change size.

Technology Code ID)

Reference Information

5-3