Datasheet

DEM 320240I TMH-PW-N (A-TOUCH) Production Specification
Version: 0 PAGE: 12
4. Optical Characteristics
4.1 Optical characteristic of the LCD
The following items are measured under stable conditions. The optical characteristics should be measured in
a dark room or equivalent state with the methods shown in Note (1).
Measuring equipment: BM-5A, BM-7
Item Symbol Condition Min Type Max Unit Note
Brightness 280 (360) -- cd/m
2
T
r
- 15 20 ms
Response time
T
f
θ=0°
-- 25 35 ms
.
Contrast ratio CR
At optimized
viewing angle
300 (450) -- --
Color Gamut NTSC % -- -- 50 -- %
R
x
0.610 0.640 0.670
Red
R
y
0.314 0.344 0.374
--
G
x
0.268 0.298 0.328
Green
G
y
0.553 0.583 0.613
--
B
x
0.107 0.137 0.167
Blue
B
y
0.139 0.159 0.179
--
Wx 0.282 0.312 0.342
Color
Chromaticity
(CIE 1931)
White
Wy
θ=0° Normal
Viewing Angle
0.309 0.339 0.369
--
θ
R
55 65 --
Hor.
θ
L
55 65 --
φ
H
40 65 --
Viewing Angle
(12H)
Ver.
φ
L
CR≥10
55 50 --
Degree
a. Test equipment setup
After stabilizing and leaving the panel alone shall be warmed up for the stable operation of LCM, the
measurement should be executed. Measurement should be executed in a stable, windless, and dark
room. Optical specifications are measured by Topcon BM-7(fast) with a viewing angle of 2° at a
distance of 50cm and normal direction.
b. Definition of response time: Tr and Tf
The response time is defined as the following figure and shall be measured by switching the input
signal for “black” and “white”.