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Toshiba TLP511E User Manual

Page 9

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4-2

1

2

3

4

5

6

7

8

9 10 11 12 Pixel

Inverted phase 2
voltage

Inverted phase 1
voltage

Center voltage

1st line

2nd line

1

2

3

4

5

6

7

8

9 10 11 12

Pixel

Normal phase 1
voltage
Normal phase 2
voltage

Inverted phase
2 voltage

Inverted phase
1 voltage

2nd line

1

2

3

1 2

3

4

5 6

7

8 9 10 11 12 Pixel

4

5

6

7

8

9

10 11 12

Pixel

Center voltage

1st line

Normal phase 1
voltage
Normal phase 2
voltage

The signal as shown in Fig. 4-1-1 is separated into the

odd and even pixels at the digital PC board. After the

signal process is carried out in the drive PC board, the

odd and even pixel signals are synthesized to

decomposite the signal on the panel.

Referring to Fig. 4-1-1, the operation principle is

described.

When assuming;

1) the signal passing through DAC1

®

Q502

®

Normal

amp. 1

®

SW31

®

SW5

®

Q516 to the positive

phase 1,

2) the signal passing through DAC1

®

Q502

®

inverted

amp. 1

®

SW32

®

SW5

®

Q516 to the inverted

phase 1,

3) the signal passing through DAC2

®

Q504

®

Normal

amp. 1

®

SW41

®

SW6

®

Q517 to the positive

phase 2 and

4) the signal passing through DAC2

®

Q504

®

inverted

amp. 2

®

SW42

®

SW6

®

Q517 to inverted phase

2,

the AC and DC levels of the positive phases 1, 2 and the

inverted phases 1, 2 are expected to be the same.

However, each voltage will vary slightly owing to the

adjustment variation. In this case, each frame signal is

assumed as follows.

<1st frame>

<2nd line>

Fig. 4-1-4

As shown in Fig. 4-1-4, even if a slight level difference

occurs among the positive phases 1, 2 and inverted

phases 1, 2 signals (approx. 100 mV), the level differ-

ence will be decreased visually by reducing the level

variation of the same line between each frame and

inverting the pixel voltage of the adjacent lines (1st line

and 2nd line) between each frame.

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