
TB1230AN
2001-09-04
71
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C ; BUS = preset value)
SW MODE
SUB-ADDRESS & BUS DATA
NOTE
ITEM
S21
S22
S31
S33
S34
S51
―
01H
05H
―
MEASURING METHOD
T15
Brightness Control
Characteristic
B
A
―
FFH
00H
10H
―
(1)
Short circuit pin 31 (Y IN), pin 33 (B-Y IN) and pin 34 (R-Y IN)
in AC coupling.
(2)
Input 0.3V synchronizing signal to pin 51 (Sync IN).
(3)
Set bus data so that R, G, B cut off data are set at center
value.
T16
Brightness Center
Voltage
↑
―
80H
↑
―
(4)
Connect pin 21 (Digital Ys) and pin 22 (Analog Ys) to ground.
(5)
While changing bus data on brightness from maximum to
minimum, measure video voltage of pin 13 (G OUT) to find
maximum and minimum voltages (max : Vbrmx, min : Vbrmn).
(6)
With bus data on brightness set at center value, measure
video voltage of pin 13 (G OUT) (Vbcnt).
T17
Brightness Data
Sensitivity
↑
―
(7)
On the conditon that bus data with which Vbrmx is obtained in
measurement of the above step 5 is Dbrmx and bus data with
which Vbrmn is obtained in measurement of the above step 5 is
Dbrmn, calculate sensitivity of brightness data (Vbrt).
Vbrt = (Vbrmxg Vbrmng) / (Dbrmxg Dbrmng)
T18
RGB Output
Voltage Axes
Difference
↑
―
(1)
In the same manner as the Note T16, measure video voltage
of pin 12 (B OUT) with bus data on brightness set at center
value.
(2)
Find maximum axes difference in the brightness center
voltage.
T19
White Peak Limit
Level
↑
―
00H
1FH
―
(1)
Set bus data so that contrast and Y sub contrast are
maximum and brightness is minimum.
(2)
Input TG7 sine wave
signal whose frequency is
100kHz and amplitude in
video period is 0.9V to pin
31 (Y IN).
(3)
Connect pin 21 (Digital Ys)
and pin 22 (Analog Ys) to
ground.
(4)
While turning on / off WPL
with bus, measure video
amplitude of pin 14 (R OUT) with WPL being activated (Vwpl).