Displaytech Ltd

LCD MODULE

INT018ATFT

Version: 1.0

8

10.Backlight specification

(Vcc=3.3V, Vss=0V, Ta=25°C)

Item

Symbol

Condition

Min

Typ

Max

Unit

Note

Supply voltage

Vf

If=20mA x2

2.9

---

3.5

V

2

Forward current

If

---

40

---

mA

3

Uniformity

ΔBp

If=30mA

80

---

---

%

Color coordination

X

0.260

---

0.305

---

Y

0.265

---

0.305

---

LED circuit diagram:

Constant current If=20x2mA; Vf=3.2±0.3V(typ)

Note:

1) As there has built-in PWM control for the backlight, so the backlight driving specification is only applicable

for direct driving.

2) The LED’s driver mode needs to be constant current mode.

3) Permanent damage to the device may occur if maximum values are exceeded. Functional operation should be

restricted to the conditions described under normal operating conditions.

11.Optical Characteristics

(Vcc=3.3V, Vss=0V, Ta=25°C)

Item

Symbol

Condition

Min

Typ

Max

Unit

Note

Brightness

Bp

θ=0º

Ф=0º

250

280

---

cd/m²

1

Uniformity

ΔBp

80

---

---

%

1, 2

Viewing Angle

θ1

(Ф=90°

or 270°)

Cr≥10

-65 ~ 65

deg

3

θ2

(Ф=0°

or

180°)

-50 ~ 40

Contrast ratio

Cr

θ=0º

Ф=0º

---

350

---

---

4

Response Time

Tr

---

30

---

ms

5

Tf

White

x

θ=0º

Ф=0º

0.2451

0.2951

0.3451

---

1, 6

y

0.2664

0.3164

0.3664

Red

x

0.5333

0.5833

0.6333

y

0.2804

0.3304

0.3804

Green

x

0.2913

0.3413

0.3913

y

0.5314

0.5814

0.6314

Blue

x

0.1036

0.1536

0.2036

y

0.0465

0.0965

0.1465

NTSC Ratio

S

---

51

---

%