12−17

REFERENCE

SPECIFICATION

1A1M-0046

EDMMRG2KAS

NAME OF SPECIFICATION

NAME OF PARTS:

Spec. No.

Arima

Display

Japan

Co.,Ltd

Rev.1

2

3

4

5

6

9

Measurement

method

of

optical

characteristics

9.1

Condition

of

measurement

Before

measuring characteristics, specimen

shall be kept under the following

condition

for

4

hours

before

and

after

each

test.

- Temp.

25±1degreeC, -Humidity 40-70%RH, -atmosphere 85-110kPa

9.2

Measurement

method

of

optical

characteristics

9.2.1

Measuring

equipment

and

specimen

-LCD7000(Optical

measurement

equipment

for

LCD

panel : Ohtsuka

electronics)

-Oscilloscope

-CS-1000 (Brightness

measurement

system : Minolta

Co,Ltd.)

- Specimen (Test LCD panel) : Measuring at only

LCD panel (measurement diameter=Φ8)

9.2.2

Definition

of

Items

Normal

The line which is perpendicular to the surface of front glass at cross point of VCL

and HCL. This is the reference line for all angles.

VCL

The vertical center line which connects the center of top and bottom margins.

This vertical line equally divides effective area.

HCL

The horizontal center line which connects center of left and right margins.

This horizontal line equally divides effective area.

Optimum

Angle

The angle which deflects θ degrees from Normal.

V-Plane

The plane which includes Normal and VCL

H-Plane

The plane which includes Optimum and HCL.

The angle toward Normal plane is shone by Φ.

Normal

H-Plane

−90°

−90°

＋90°

Optimum

V-Plane

＋90°

Angle

9.3

Measurement of LCD driving voltage (Vopr) and Contrast Ratio (CR)

-Set the measuring equipment to 25degreeC, and place the LCD panel at normal position

(θ=0, Φ=0 degree) in the LCD7000.

-Display selective data (screen:WHITE) and non-selective data (screen:BLACK) of specified duty

ratio alternatively, and measure brightness at each data. Increase driving voltage gradually and

measure brightness Y2 at selective state and Y1 at non-selective state.

-Calculate Contrast Ratio (CR=(Y2-Y0)/(Y1-Y0)) at each voltage and determine voltage which

gives the maximum CR as Vopr. (Vopr=V0-Vss,Vss=GND)

* note Y0 : Brightness from ambient lighting

9.4

Measure

of

Vertical

viewing

angle

(Φ=0 degree)

- Set the measuring equipment (LCD7000) to 25 degreeC, and apply the above Vopr to the LCD

panel. Then change the θ angle (Φ=0 degree), measure brightness at selective state Y2 and

non-selective state Y1 and calculate Contrast Ratio. (CR=(Y2-Y0)/Y1-Y0))

-Angles above CR=> 1.5 is defined as vertical viewing angle.

φ

θ