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(3) Definition of φ and θ:
11.2 Measuring Methods
(1) Luminance:
The luminance of the center on a white raster (gray scale level L63) shall be measured.
Measurement shall be executed 30 minutes after the LED is lit up.
(2) Contrast Ratio:
The contrast ratio can be calculated by the following expression.
Contrast Ratio (CR) = L63 / L0
L63 : Luminance on the white raster (gray scale level L63)
L 0 : Luminance on the black raster (gray scale level L0)
(3) Viewing Angle:
Viewing angle is defined as the angles(θ, φ), in which specified contrast ratio can be obtained.
(Refer to 11.1(3) for the axes.)
Toshiba Matsushita Display Technology Co.,Ltd
Specification No. TENTATIVE
Z
(
= 0 ° )
θ
θ
(
= 0 ° )
φ
Left
Side
(
= -90 ° )
φ
X
Lower
Side
(
= 0 ° )
Date: 2008 – 11- 07
Date:
Measurement
Direction
Upper
Side
(
= 180 ° )
Right
Side
Y
New No. LTA057A341F-14
Old
-
-
←# Special
Sheet
34
No.
←& Addition
← Change
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