Specification No. TENTATIVE
Sheet
34
Toshiba Matsushita Display Technology Co.,Ltd
Date: 2008 – 11- 07
Date: - -
New No. LTA057A341F-14
Old No.
←
# Special
←&
Addition
←
Change
(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.)
Measurement
Side
Z
Side
Side
X
Y
Side
φ
φ
φ
φ
φ
θ
θ
φ
Right
Upper
Left
Lower
Direction
(
= 0° )
(
= 0° )
(
= -90° )
(
= 180° )
(
= 90° )
(
= 0° )