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4. Lens drive block
4-1. Zoom drive
Drive settings are made by means of the serial signals
(L_STR, L_SCLK and L_SDATA) and signal (ZIN) which are
output from the ASIC (IC101), and then the zoom drive volt-
age (ZOUT+, and ZOUT-) are output in accordance with the
settings from the motor driver IC (IC951) to drive the zoom
DC motor.
Detection of the standard zooming positions is carried out by
means of signal (ZHPOUT) from the photointerruptor by ASIC
(IC101) is detecting inside the lens block. Also, getting of the
zooming positions is carried out by the ASIC (IC101) count-
ing the photointerruptor (ZENOUT).
4-2. Focus drive
Drive settings are made by means of the serial signals
(L_STR, L_SCLK and L_SDATA) and signal (F_CLK) which
are output from the ASIC (IC101), and then the focus drive
voltage (FOUT_A+, FOUT_ A-, FOUT_B+ and FOUT_B-) are
output in accordance with the settings from the motor driver
IC (IC951) to drive the focus stepping motor.
Detection of the standard focusing positions is carried out by
the ASIC (IC101) detecting the signal (FHPOUT) from the
photointerruptor inside the lens block.
4-3. Iris drive
Drive settings are made by means of the serial signals
(L_STR, L_SCLK and L_SDATA) and signal (IIN) which are
output from the ASIC (IC101), and then the iris drive voltage
(IOUT+ and IOUT-) are output in accordance with the set-
tings from the motor driver IC (IC951) to drive constant the
moving coil motor for iris.
4-4. Shutter drive
Drive settings are made by means of the serial signals
(L_STR, L_SCLK and L_SDATA) and signal (SIN) which are
output from the ASIC (IC101), and then the shutter drive elec-
tric current (SOUT+ and SOUT-) are output in accordance
with the settings from the motor driver IC (IC951) to drive
constant the moving magnet motor for shutter, and then mecha
shutter is opened and closed.
– 6 –
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