Table 3-53 describes the return parameters.
Table 3-53 Return ParametersParameter Bytes | Description |
---|
Byte 1 | Red LED current parameter (LSByte) |
Byte 2 | Red LED current parameter (MSByte) |
Byte 3 | Green LED current parameter (LSByte) |
Byte 4 | Green LED current parameter (MSByte) |
Byte 5 | Blue LED current parameter (LSByte) |
Byte 6 | Blue LED current parameter (MSByte) |
The parameters returned by this
command have a resolution of 10 bits, and are defined by the appropriate DLPA200x
specification.
When the CAIC algorithm is enabled
using the LED Output Control Method command:
- The Write RGB LED
Current command directly sets the LED currents when an all-white
image is displayed. If the image changes from an all-white image, depending
on the image, the CAIC algorithm may alter one or more of the LED currents
from those specified by the Write RGB LED Current command, and the
total LED power may drop. The actual LED currents for the image currently
displayed are read using the Read CAIC RGB LED Current command.
- In the case of an all-white
image, the values returned by this command closely match, but may not
exactly match, those specified using the Write RGB LED Current
command. For an all-white image, this command provides values within +/- 4
DLPA200x device current steps for each LED color relative to those specified
with the Write RGB LED Current command.
Use of this command is only
appropriate when the LED output control method is set to CAIC (automatic) RGB LED
current control.
Unused most significant bits are set
to 0.