TA1360AFG_05 Datasheet, PDF (47/110 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Characteristics
P05 Black stretch characteristic
switch
TA1360AFG
Test Conditions
SW Mode
SW71 SW70 SW68 SW64 SW74
Test Method (Test condition: V_CC = 9 V/2 V, Ta = 25 ± 3°C)
A
A
C
B OPEN 1. Set SW70 to A (maximum gain), black stretch point 1 (18) to maximum (E0), subaddress (1C) data to (00)
and (1E) data to (08).
2. Apply 0 V to #71 and connect external power supply PS to #68. Set PS to V₆₈ + 0.7 V, and adjust unicolor so
that DC level of #12 is +1.0 V. Plot voltage change S4 of #12 (voltage in picture period).
3. Determine intersection points (V_BSC1 and V_BSC2) of S2 and S4 obtained from the plot in black stretch start
point 1. Then calculate P_BSC1 and P_BSC2 using following equation.
4. Set black stretch characteristic switch subaddress data (1C)/(1E) to (20)/(00) and (20)/(08) respectively. As
described in steps 2 and 3,
P_BSC3, P_BSC4, P_BSC5 and
determine
P_BSC6.
intersection
points
(V_BSC3,
V_BSC4,
V_BSC5
and
V_BSC6)
and
calculate
P_BSC* = (V_BSC* [V] − V₁₂ [V]) ÷ 1.0 × 100 [(IRE)]
#12
V_BSC2
V₁₂
V68
V_BSC1
S2
V₆₈ + 0.7 V ^#68
S4 Black stretch characteristic switch ON
47
2005-08-18