Product Specification

LP140WH4

Liquid Crystal Display

Ver. 1.1

Dec. 17, 2010

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3-7. Power Sequence

Note)

1. Do not insert the mating cable when system turn on.

2. Valid Data have to meet “3-3. LVDS Signal Timing Specifications”

3. LVDS, LED_EN and PWM need to be on pull-down condition on invalid status.

4. LGD recommend the rising sequence of VLED after the Vcc and valid status of LVDS turn on.

Table 6. POWER SEQUENCE TABLE

LED

Parameter

Value

Units

Min.

Typ.

Max.

T

8

0

-

-

ms

T

9

0

-

-

ms

T

10

0

-

-

ms

T

11

0

-

-

ms

T

12

0.5

-

-

ms

T

13

0

-

-

ms

Logic

Parameter

Value

Units

Min.

Typ.

Max.

T

1

0.5

-

10

ms

T

2

0

-

50

ms

T

3

0

-

-

ms

T

4

150

-

-

ms

T

5

200

-

-

ms

T

6

0

-

-

ms

T

7

0

-

10

ms

T

7

Interface Signal, V

i

LVDS

Power Supply Input

VCC

90%

10%

10%

0V

90%

T

1

T

2

T

3

T

4

T

5

T

6

0V

LED BL

Dimming Control Signal

PWM

0V (Low)

T

8

LED Driver Input Voltage

VLED

T

10

LED BL

On/Off Control Signal

LED_EN

T

11

T

9

Valid Data

0V

Valid Data

0V (Off)

90%

10%

T

12

90%

3.0V

3.0V

10%

T

13