103
Rigel-PJ1nx Training
Slide 103
Automatic Trapezoidal Correction
Processor Block
The gravity acceleration sensor (IC3504) is used to detect the gradient of the
projector so that the trapezoidal corrector (Keystone) can be regulated
automatically. The gravity acceleration sensor generates I
2
C output according to
the gradient of the projector. The data is sent to the CPU (IC3001) and the
angular data are computed at the CPU.
In order to control the scattering in the detected angle for the gravity acceleration
sensor, the horizontality condition is calibrated for each set at the time of factory
production and the obtained data are retained in the EEPROM.
