LP104S5

LP104S5--A2VT

A2VT

Liquid Crystal Display

Liquid Crystal Display

Product Specification

Product Specification

Ver

Ver 0.0

0.0

Oct.06.

Oct.06. 2000

2000

Page

Page

66//23

23

3. Electrical Specifications

3-1. Electrical Characteristics

The LP104S5-A2VT requires two power inputs. One is employed to power the LCD electronics and to

drive the TFT array and liquid crystal. The second input which powers the CCFL, is typically generated by

an inverter. The inverter is an external unit to the LCD.

Table 2

ELECTRICAL CHARACTERISTICS:

Parameter

Symbol

Values

Units

Notes

Min.

Typ.

Max.

Module

Power Supply Input Voltage

Power Supply Input Current

Power Consumption

Rush Current

3.0

-

-

-

3.3

290

0.96

1.0

3.6

360

1.2

1.5

Vdc

A

W

A

1

1

3

Lamp

Operating Voltage

Operating Current

Established Starting Voltage at

25

°C

0

°C

Discharge Stabilization Time

Operating Frequency

Power Consumption

Life Time

Ts

475(7mA)

3.0

-

-

45

-

20,000

500(6mA)

6.0

-

-

60

3.0

640(3mA)

7

845

1015

3

80

3.3

-

mA

min

kHz

Watts

Hours

4

5

5

7

6

8

9

Notes: The design of the inverter must have specifications for the lamp in LCD Assembly.

The performance of the Lamp in LCM,for example life time or brightness,is extremely influenced by

the

characteristics of the DC-AC Inverter.So all the parameters of an inverter should be carefully

designed

so as not to produce too much leakage current from high-voltage output of the inverter.

When you design or order the inverter,please make sure unwanted lighting caused by the mismatch

of

the lamp and the inverter(no lighting,flicker,etc) never occurs.When you confirm it,the LCD Assembly

should be operated in the same condition as installed in your instrument.

1. The specified current and power consumption are under the Vcc = 3.3V , 25

°C, fv = 60Hz

condition

whereas mosaic pattern is displayed.

2. The duration of rush current is about 20ms.

3. The variance of the voltage is

±10%.

Otherwise,the lamps may not be turned on.

5. The output of the inverter must have symmetrical(negative and positive) voltage waveform and

symmetrical current waveform.(Unsymmetrical ratio is less than 10%)

Please do not use the inverter which has unsymmetrical voltage and unsymmetrical current and

spike wave. Lamp frequency may produce interference with horizontal synchronous frequency

and

as a result this may cause beat on the display.

Therefore lamp frequency shall be as away as possible from the horizontal synchronous

frequency

and from its harmonics in order to prevent interference.

6. Let’s define the brightness of the lamp after being lighted for 5 minutes as 100%.