LCX021AM datasheet(12/24 Pages) SONY

12 / 24 page

1. Contrast ratio

Contrast Ratio (CR) is given by the following formula (1).

CR =

L (White)

... (1)

L (Black)

L (White): Surface luminance of the TFT-LCD panel at the input signal amplitude VAC = 0.5V

L (Black): Surface luminance of the panel at VAC = 4.5V

Both luminosities are measured by System I.

– 12 –

LCX021AM

<Electro-optical Characteristics Measurement>

(6) Optical measurement systems

• Measurement system I

Elliptic mirror

Relay lens system

Dichroic mirrors

Fresnel lens

LCD panel

Projection lenses

Screen

100W lamp angle distribution

Panel incident light dispersion angle [ ° ]

0.0

1.0

2.0

3.0

3.5

4.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

• Measurement system II

Light Detector

Measurement

Equipment

Optical fiber

LCD panel

Light receptor lens

Drive Circuit

Light

Source

Basic measurement conditions

(1) Driving voltage

HVDD = 15.5V, VVDD = 15.5V,

VVC = 7.0V, Vcom = 6.6V

(2) Measurement temperature

25°C unless otherwise specified.

(3) Measurement point

One point in the center of the screen

unless otherwise specified.

(4) Measurement systems

Two types of measurement systems

are used as shown below.

(5) Video input signal voltage (Vsig)

Vsig = 7.0 ± VAC [V]

(VAC: signal amplitude)

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