Lg Electronics 47LE8500 用户手册

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

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

100%

0%

July 2010       47LE8500     LCD-DV 

Leandro 

Palmeira