Datasheet

DEM 320240D TMH-PW-N (A-TOUCH) Production Specification
Version: 1 PAGE: 11
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 450 (560) -- cd/m
2
Response time
T
r
q=0°
- 15 20 ms
.
T
f
-- 25 35 ms
Contrast ratio CR
At optimized
viewing angle
300 (450) -- --
Color Gamut
NTSC %
-- -- 50 -- %
Color
Chromaticity
(CIE 1931)
Red
R
x
q=0° Normal
Viewing Angle
0.610 0.640 0.670
--
R
y
0.314 0.344 0.374
Green
G
x
0.268 0.298 0.328
--
G
y
0.553 0.583 0.613
Blue
B
x
0.107 0.137 0.167
--
B
y
0.139 0.159 0.179
White
Wx 0.282 0.312 0.342
--
Wy 0.309 0.339 0.369
Viewing Angle
(12H)
Hor.
q
R
CR³10
55 65 --
Degree
q
L
55 65 --
Ver.
f
H
55 65 --
f
L
40 50 --
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”.