Maximum P-DIM Voltage
100% Cust Backlight Setting
Brightness and Contrast adjustments do not affect P-DIM
The Video Processor has the output that controls P-DIM. If the Microprocessor is separate from the video processor, then the
customer’s menu Backlights setting is communicated to the video processor via I2C.
Analog Dimming is not used.
It is a fixed voltage. Also called BR1, VBR-A, BCM-VBR-A, ADM
Minimum P-DIM Voltage
0% Cust Backlight Setting
P-DIM Voltage
Establishes the maximum threshold or
brightness level of the backlights
3.3V
Brightness of
Backlights
After the max. threshold is established by the Customer’s
Menu, the DC Level of P-DIM is manipulated by:
Overall Contrast Ratio
Monitored by the BCM or Mstar Video Processor.
As the overall brightness of the video content decreases,
so does P-DIM voltage.
If the Intelligent Sensor is utilized, it too manipulates P-DIM.
As the overall room light decreases in intensity, P-DIM
decreases. This data represents nearly 5000 steps in room
light monitoring. It is routed from the Front IR board through
I2C data back to the Main board’s Microprocessor.
Midrange P-DIM Voltage
50% Cust Backlight Setting
1.68V
0.37V
Backlights Bright
Backlights Dim
100%
0%
September 2010 47LX9500 LCD-DV
P-DIM (Global Dimming) Explained:
P-DIM (May also be called PWM-DIM, VBR-B, PDS, BCM-VBR-B)
P-DIM (Global Dimming) Explained:
P-DIM (May also be called PWM-DIM, VBR-B, PDS, BCM-VBR-B)
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