Panasonic TH42PX20U - 42" HDTV PLASMA DISPLAY, Информация об обновлении сервиса, Страница: 23 / 70

D Board Outline
Figure 10
The D-board consists of the digital signal process circuitry. The analog RGB
input is converted to digital by IC9009. The eight bit digital output enters IC9151
for processing.
The digital video data is converted to progressive scan and mixed with the OSD
data. Adjustments such as white balance, contrast, and color drives are also
corrected here.
IC9455 contains the Plasma AI (Adaptive brightness Intensifier) circuit that
analyzes the video program level for the distribution of dark and bright
components. The Plasma AI circuit converts the 8 bit signal data to 10 bit signal
data. The Sub-field Processor is used to speed up the scanning process and
control the number of sustain periods. This increases the brightness and
improves the contrast ratio. It also creates the two channels of data that drive the
C1 and C2 data output boards.
The D-board provides the scan, sustain, and data drive signals. The scan pulses
are output to the SC board. The sustain pulses are output to the SS board. The
data drive signals are output to the C1, and C2 boards. The C1 board drives the
right portion of the panel; the C2 board drives the left portion.
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