VB · TND

SM = —————

× 100 [%]

250

VB: The amount of smear at point B (mV)

TND: The transmittance of the neutral density

filters used.

5. Dark signal

Block all light from the surface of the CCD element, and measure the CCD output signal at the center of the screen.

For this measurement, do not measure the difference between the signal level and the optical black area level, but

rather, read out the difference with the no-signal level at a point where there is no pixel information. (See the figure.)

Structure of the Horizontal Period

6. Color irregularity (mura)

With no pattern in the LV-2001 pattern box, image the pattern box with a C-500 1-mm thick IR cut filter and a 7%

neutral density filter over the whole surface of the 1/5-inch standard lens used for measurement. Verify that the CCD

average output at this time is over 200 mV. Calculate the color difference signals RY and BY from the following

formula from the average output of post-image processing R, G, and B signals. The color irregularity (mura) CS is

defined as the distance between the two points for which the data (RY and BY) is separated the most for all the areas.

RY = {(red-green) – (blue-green)

× 0.25} × 101/64

BY = {(blue-green) – (red-green)

× 0.125} × 50/64

Color Irregularity (mura) Data Acquisition Areas

No. 5783-8/11

LC9997M

Optical black area

Optical black area

Effective pixel area

No-signal area

In each block:

V direction: 30 pixels

H direction: 60 pixels

In each block:

V direction: 30 pixels

H direction: 60 pixels

Divided into 8 areas of equal separation.

Divided into 8 areas of equal separation.

Point A

Point B