PT0801ARS-0 datasheet(21/65 Pages) POWERTIP

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KS0065 2.7 ~ 5.5V

KS0063 2.7 ~ 5.5V

SED1181 5.0V min.

LCD panel: The driving voltage for most all LCD panels is above 3.3V. It is necessary

to then add a "negative voltage" IC on the PCB of the module or to the customer's

motherboard to raise the voltage. A couple of NV generators is as follows:

NV IC: SCI7661 3X with temperature compensation.

SCI7660 2X, dice font available (at a much less expensive cost).

If a NV IC must be incorporated onto the module PCB, there is apt to be

two possible considerations:

Tooling cost

The PCB is too small to accommodate the NV IC. If there is not

sufficient space, a possible solution would be to replace one controller

with a driver, with single controller (such as replacing a KS0066(U) &

KS0065(B) with a KS0070). The per unit cost will be a little greater but it

will save overall space on the PCB and eliminate having to re-tool the

PCB.

Some TAB IC's such as SED1560 series include a power circuit, which

can amplify the input voltage to drive the LCD. In this case it is not

necessary to add a NV IC to raise the voltage.

C. Backlight:

CCFL & EL: These backlight options require an inverter. The inverter

chosen cannot exceed 3.3 Volts.

LED: In an attempt to achieve this 3.3V requirement it is necessary to

use an edge-lit LED. Note this edge-lit LED will still consume a large

current.

10. Reference to Viewing angle:

Viewing Angle is the direction by which the display will look best. This is established

during the manufacturing process and can not be changed by rotating the polarizer.

Viewing direction is specified in terms of a clock position, such as 6:00 & 12:00.

Please refer to the following drawing:

Page 4 of 6

Powertip USA

11/10/2004

http://www.powertipusa.com/qa.htm

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