FIG.1 Scan rate conversion mode for display
Fig.1 shows the differences between 100Hz interlaced scan and 50/60Hz progressive scan.
The biggest advantage of progressive scan is "non-interlacing", but field frequency is kept at 50/60Hz.
This means the line construction (density) is twice, compared with 100Hz interlaced scan. Therefore, if
progressive scan mode is selected, large area flicker will be still appeared on display, but will eliminate lines flicker.
RGB Processor - TA 1276AN
The TA1276AN is RGB Processor IC which included features are Black stretch, Gamma correction,
Contrast/Brightness/Colour/Tint/Sharpness controls, G and B drive gain control and Velocity Scan Modulation
signal control. The Black stretch is stable operated at each of the viewing format, by input the Clamp pulse
signal to pin 25 of TA1276AN from the 4:3 frame generator which are consisted of IZ03 and IZ05.
Input Signals.
Y, U, V, input signals which are supplied by the feature box. The nominal input signal for Y is 0.7V Peak-to-Peak.
The nominal input signals for U and V are 300mV Peak-to-Peak respectively. |
ACEC
HITACHI
