LA76810A
Continued from preceding page.
Input signal
Symbol
Vbias0
Test point
19
Input signal
Test method
Bus bit/input signal
Bias (cutoff) control
(min)
L-50
Measure the 0IRE DC levels (Vbias0* V) of the
respective output signals of R output (19), G
output (20), and B output (21).
Sub-Brightness:
0000000
*: R, G, and B
20
21
(max)
Vbias255
Vbiassns
Measure the 0IRE DC levels (Vbias255* V) of the
respective output signals of R output (19), G
output (20), and B output (21).
Sub-Brightness:
1111111
Red/Green/Blue
Bias: 11111111
Red/Green/Blue
Bias:01010000
*: R, G, and B
Bias (cutoff) control
resolution
Measure the 0IRE DC levels (BAS80* V) of the
respective output signals of R output (19), G
output (20), and B output (21).
*: R, G, and B
Measure the 0IRE DC levels (BAS48* V) of the
respective output signals of R output (19), G
output (20), and B output (21).
Red/Green/Blue
Bias: 00110000
Calculate Vbiassns* = (BAS80*-BAS48*)/32
Sub-bias control
resolution
Vsbiassns
L-50
Measure the 0IRE DC levels (SBTPM* V) of the
respective output signals of R output (19), G
output (20), and B output (21).
Sub-Brightness:
0101010
Contrast: 0111111
Calculate Vsbiassns* = (BRTPC*-SBTPM*)
Drive adjustment
maximum output
RBout127
Gout15
L-100
Measure the 100IRE amplitudes
(DRVH* Vp-p) of the respective output
signals of R output (19) and B output (21).
*: R and B
Measure the 100IRE amplitude of the output
signal of G output (20) and assign the measured
value to DRVH* Vp-p.
Brightness:
0000000
19
20
21
*: G
Output attenuation
RBout0
Measure the 100IRE amplitudes (DRVL* Vp-p) of
the respective output signals of R output (19), G
output (20), and B output (21).
Brightness:
0000000
Red/Blue Drive:
0000000
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*: R and B
Measure the 100IRE amplitude of the output
signal of G output (20) and assign the measured
value to DRVL* Vp-p.
*: G
Gout0
RBout0* = 20Log (DRVH*/DRVL*)
Gout0* = 20Log (DRVH*/DRVL*)
Measure the 100IRE amplitude of the respective
output signals of R output (28), G output (29),
and B output (30) with Gamma Def being ON and
OFF. Assign the measured values to *A, *B and
Vp-p, respectively.
Gamma correction
Rγ
Gγ
Bγ
L-100
Contrast: 0111111
Brightness:
19
20
21
01111111
Gamma Def: Off,On
B Gamma
* : R, G, B
*γ = 100*(*A/*B)
sel: 11,00
NoA0252-16/40
SANYO [ SANYO SEMICON DEVICE ]
