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Figure 29.27. LCD 1/3 Bias and Triplex Multiplexing - LCD_COM2
V LC0 (V LCD )
V LC1 (2/3V LCD )
V LC2 (1/3V LCD )
V LC3 (V SS )
Fram e Start
Fram e End
1/3 bias and triplex multiplexing - LCD_SEG0
The LCD_SEG0 waveform illustrates how different segment waveforms can be multiplexed with the
COM lines in order to turn on and off LCD pixels. As illustrated in the figures below, this waveform will
turn ON pixels connected to LCD_COM1, while pixels connected to LCD_COM0 and LCD_COM2 will
be turned OFF.
Figure 29.28. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0
V LC0 (V LCD )
V LC1 (2/3V LCD )
V LC2 (1/3V LCD )
V LC3 (V SS )
Fram e Start
Fram e End
Figure 29.29. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0 Connection
com 0
com 1
com 2
1/3 bias and triplex multiplexing - LCD_SEG0-LCD_COM0
? DC voltage = 0 (over one frame)
? V RMS = 0.33 V LCD_OUT
? The LCD display pixel that is connected to LCD_SEG0 and LCD_COM0 will be OFF with this waveform
Figure 29.30. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0-LCD_COM0
V LC0 (V LCD )
V LC1 (2/3V LCD )
V LC2 (1/3V LCD )
V LC3 (V SS )
-V LC2 (1/3V LCD )
-V LC1 (2/3V LCD )
-V LC0 (V LCD )
Fram e Start
Fram e End
1/3 bias and triplex multiplexing - LCD_SEG0-LCD_COM1
? DC voltage = 0 (over one frame)
? V RMS = 0.64 × V LCD_OUT
2011-04-12 - d0001_Rev1.10
423
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