Specification No. TENTATIVE
Sheet
28
Toshiba Matsushita Display Technology Co.,Ltd
Date: 2008 – 11- 07
Date: - -
New No. LTA057A341F-14
Old No.
←
# Special
←&
Addition
←
Change
6.5 Display Quality
6.5.1 Test Conditions
1) Inspection Area: Within viewing area
2) Condition
: Same as test conditions shown in 4.1 and 6.2
3) Test Pattern : White display pattern (gray scale level L63) and black display pattern (gray scale level L0)
6.5.2 Specifications
4)
Item
Description / Specifications
Class
Function No
display,
Malfunction
Major
Missing line
Major
Missing Sub-Pixels
1) Bright defects : 4pcs. Maximum
2) Dark defects : 4pcs. maximum
3) Total sub-pixel defects : 5pcs. Maximum
4) Bright defect conjunction(2sub-pixels) : 1set max.
5) Dark defect conjunction(2sub-pixels) : 1set max.
6) Bright defect conjunction(3sub-pixels) : 0set
7) Dark defect conjunction(3sub-pixels) : 0set
8) Distance : Bright defect - Bright defect
≥
15 mm
Dark defect - Dark defect
≥
10 mm
Bright - Dark defect neglect
Minor
Display Quality
1)2)3)
Inconspicuous flicker, crosstalk, Newton's ring and other defects :
neglect
---
Black and White
Spots/line
Inconspicuous defects : neglect
---
Backlight Missing
(Non-operating)
Major
Note 1) Defects of both color filter and black matrix are counted as bright or dark defects.
Inspection area should be within the active area.
Note 2) Bright defect means a bright spot(sub-pixel) on the display pattern of gray scale L0.
Dark defect means a dark spot(sub-pixel) on the display pattern of gray scale L63.
Note 3) Bright spot which can not be found by using 5%ND-Filter shall not be counted as a defect.
Note 4) After the power of LCD is turned off, the last displayed image remains in the display for a few minutes.
But this remained image is not Error. So phenomenon of remained display is not subject to display quality
criteria.
