DSS NETWORKS Gig-cPCI-3U Instrukcja Użytkownika Pobierz pdf (Strona 15)

product selection guide · summer 2007 |

s y s t e m s & e n cl o s ur e s

Ordinary touch screens cannot be used in

direct sunlight or in uncontrolled lighting

environments because a normal LCD will

turn black when exposed to sunlight and

UV radiation. To overcome this problem, GE

Fanuc Embedded Systems adds a number

of passive enhancements to maximize

readability and allow LCDs to operate in

direct sunlight.

The touch screen itself incorporates an

anti-glare coating on its face, as well as an

anti-reﬂective coating on the back and front

of the LCD. The LCD also has a transﬂective

backlight enhancement ﬁlm. These coatings

match the index of refraction to reduce light

reﬂecting back at the viewer, increasing

the contrast ratio and enhancing overall

readability in bright lighting conditions.

(See Figure 1)

Through the use of these special coatings,

ﬁlms, and ﬁlters, the unit achieves sunlight

readability without additional backlights.

The end result is 1000-nit equivalent viewing

without the additional power draw and heat

generation of more backlights. Consequently,

the unit has a longer life, better processor

performance, and a wider operating

temperature range.

Touch Screen: Acrylic-on-Glass Resistive

Designing a touch screen that will function

in a rugged environment is no simple matter.

GE Fanuc Embedded Systems designs

screens with laminated construction and

strengthened glass that offer resistance

to high impact forces and that withstand

signiﬁcant shock and vibration in extreme

environments. At the same time, these

screens provide up to 87% light transmission

and as low as 6% low light reﬂection. Our

screens also excel in harsh environments

by allowing for a UL50, Type 4 seal (when

properly integrated) and certiﬁcation for

hazardous locations.

Perhaps most importantly, for oil and gas

exploration and extraction operations, these

rugged touch screens function with a variety

of gloves and can accept inputs through a

range of contaminants. (See Figure 2)

Screen brightness increased by reflecting

sunlight and utilizing backlights

Polarizer

Liquid

Crystal

Backlight

Optical Filters

• Diffuser

• Brightness

- Enhancement Filters

Reflector

Anti-Reflective

Coating

Figure 1: SLR LCD: Passive Enhancements

6 Anti-glare casting on touch screen face

6 Anti-reﬂective coatings on touch screen back and

LCD front: matches index of refraction to reduce

light reﬂecting back at the viewer — increases

contrast ratio

6 IR blocking ﬁlm added to reduce thermal loading

effects of the sun

6 Transﬂective backlight enhancement ﬁlm (BEF)

Sunlight Readable LCDs

Display Touchscreen CPU Memory Ethernet

Expansion

Slots Notes

PAC-Xscale

5.7" 320x240

256k color*

AMTFT LCD

Resistive

Intel

Xscale

32 MB SDRAM (up to 96 MB);

32M Flash; 512K NV RAM

10BaseT / 100BaseTX auto-detect /

auto-switch, Full/Half-duplex,

auto-select, One port 10/100 Mbits/sec

One

slot

0° to +60° C operating temperature

PAC-Xscale-12

12.1" 800x600

32k color

AMTFT LCD

Resistive

Intel

Xscale

32 MB SDRAM (up to 96 MB);

32M Flash; 512K NV RAM

10BaseT / 100BaseTX auto-detect /

auto-switch, Full/Half-duplex,

auto-select, One port 10/100 Mbits/sec

One

slot

Fieldbus support: AnyBus-S: Ethernet,

Series 90-30 I/O, DeviceNet, Proﬁbus,

Genius, Modbus Plus

Embedded systems typically operate a single application. Thin Clients allow them to execute

centrally located programs at a remote location. They usually do not require the processing

power our other industrial computer systems offer. Our Thin Client and Embedded Systems can

help you reduce your system costs, while providing scalability and ﬂexibility.

Thin Client Systems

* Video hardware/ﬁrmware limits to 65k colors

Controller alternates voltage

between layers to get

touch coordinates

Touch creates

contact between

resistive circuit

layers, closing

a switch

Spacer dot

ITO conductive

coating

Bottom circuit layer

Glass or acrylic

backing panel

PE T film

Top circuit layer

ITO conductive

layer

Figure 2: Acrylic-on-Glass Touch Screen

6 Laminated construction with strengthened glass

increases resistance to high impact forces

6 Up to 87% light transmission and as low as 6%

low light reﬂection

6 Excels in harsh environments by allowing for a

UL50, Type 4 seal (when properly integrated) and

certiﬁcation for hazardous locations

6 Functions with a variety of gloves through a

range of contaminants

6 Withstands signiﬁcant shock and vibration in

extreme environments

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