Projectiondesign F3 xga Manuel utilisateur

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Colour Wheel Options

projectiondesign Colour Wheel Options – p a g e 2

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projectiondesign unique Colour Wheel Options

All projectiondesign professional F-series projectors have the option of user

specified colour wheels options, to perfectly match application requirements.

DLP™ technology creates projected images by presenting colours in a

sequential format, using the primary colours red, green, and blue to create

and reproduce any computer or video generated colour or combination of

colours. Sequential colour display works by displaying only one single colour

at the time, for very short periods, so that the eye and brain interprets the

resulting image as a full colour one. Switching between the primary colours,

thus creating full colour images, happens incredibly fast, imperceptible to the

human eye.

By giving the user or integrator the option to specify colour wheels,

projectors can be tailored to specific requirements and applications,

such as pure black and white imaging, wide colour gamut simulation and

visualization, general graphics display, medical imaging, and so forth.

Each colour wheel option gives slightly different performance characteristics,

enabling a perfect match to the desired applcation.

What are the options?

Each model has slightly different options, depending on their specification

and construction. There are, however, certain options that can fill or fit the

same requirements, even though the actual colour wheel is different. There

are three main categories:

High Brightness

General Graphics Display

Visualization and Simulation

Obviously, colour wheels that fit into these three categories can also be used

for other applications. More applications in general, and their anticipated

requirements, are listed below.

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projectiondesign Colour Wheel Options – p a g e 3

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Colour Wheel Option details.

Colour wheels are built up using differently sized segments, consisting of

the primary colours RGB, and with added accents, such as a clear (“White”)

segment, or a neutral density green segment (“NDG”) segment.

Addition of a clear segment

The addition of a clear segment in the colour wheel increases maximum

available brightness from a projector. By allowing white light from the lamp

to pass through without being obstructed or coloured, white areas of an

image, for instance a work sheet in Microsoft Excel, or a page in Word, will

gain an incredible light output. Adding a relatively large size clear segment is

common for business and presentation DLP™ projectors, as brightness and

specifications are very important. Using a smaller clear segment gives added

benefits; extra boost in white parts of the image, thus increasing available

brightness, and at the same time adding more brightness in colours, thus

displaying an image more suited for graphics and general usage.

Options for clear segment sizes

projectiondesign offers differently sized clear segments to fit various

products and various uses and applications. They are generally referred to

after their intended use or main properties, for instance High Brightness

(largest clear segment), or Graphics Display (smallest clear segment). For

best possible application fit, it is important to have a clear understanding of

the purpose of the installation when ordering projectors. Refer to table below

for applications and recommendations.

3-segment RGB, and 6/7-segment RGBRGBG, no clear.

The best possible image quality is reached with the 3- and 6-segment colour

wheels, without any clear segment at all. Removing the clear segment,

and only using primary colours for image display, gives better saturation in

colours, on the expense of some maximum brightness. Image quality as such

increases. The resulting larger area per colour yields better colour resolution,

decreased artefacting, and an overall more balanced image than when using

a 4-segment wheel. In addition, the 3-segment, and 6/7-segment colour

wheels feature higher speeds, so more revolutions per minute, which results

in decreasing visible colour break up artefacts and so-called rainbow effects.

A 6-segment colour wheel doubles the speed over a regular wheel, and draws

the image twice as many times in a given period. 3-segment wheels run even

faster, so even with a reduced number of segments, share the same feature.

This particular feature, plus the increased colour resolution and saturation,

make these wheels the primary options for applications such as simulation

and visualization. 6-segment RGBRGB colour wheels are available for XGA

and 720p resolution projectors, whereas 3-segment RGB are available

for SXGA+ resolution projectors. They fill the same requirements. Please

note: 7-segment colour wheels with NDG accents are not available for the

professional F-series, only for 16:9 HDTV displays (720p or 1080p).

RGBRGB(ND)G

RGB

RGB40

RGB80

RGB100

RGBRGB(ND)G

RGB

RGB40

RGB80

RGB100

RGBRGB(ND)G

RGB

RGB40

RGB80

RGB100

projectiondesign Colour Wheel Options – p a g e 4

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Sample application details and recommendations

Visualization

A vast range of applications can be covered under the visualization umbrella.

Generally, visualization is commonly used about applications that seek to

graphically present large amounts of data, be it photographic or computer

created, such as geophysical data (for instance oil and gas well exploration),

CAD/CAM construction and photorealistic rendering, computer modelled

flow and stress analysis, etc. Immersive and augmented displays and Virtual

Reality go in the visualization category. Visualizatoin aids in understanding

and interpreting data, and in general, require very high resolution displays,

and photorealistic colours with great depth and contrast. Recommended

colour wheels; 3/6-segment (primary), or 4-segment (secondary) with a small

clear segment added for extra impact.

Simulation

Some simulation applications can be covered under the visualization

umbrella, but in this case, we refer to simulation as that what talkes place

as a substition of real life application. Simulation is primarily used in training

situations, such as for driving, flying, sailing and bridge (ships), as well

as shooting, fire extingushing and a whole lot of other training situations.

Common to most of these applications is that they require photorealistic

rendering, high contrast and detail, and reduced artefacting in the form

of rainbows and breakup. Recommended colour wheels; 3/6-segment for

reduced artefacting and realistic colours.

Medical imaging

Medical imaging applications include for instance MR and XRay imaging.

General requirements include an accurate grey scale, a correct gamma

transfer function, increased colour depth and reduced artefacting. These

are, of course, a very small part of the requirements in this field, but they are

relevant to the choice of colour wheels. Recommended colour wheels; 3/6-

segment, or 4-segment with a small clear segment added for extra impact,

depending on the actual application.

Business presentations

Most business presentations take place in rooms and environments where the

presenter has little or no control over lights and environment. High brightness

is often the main requirement, as that makes the presentation easier to see

and the environment less of a problem. Recommended colour wheels; high

brigthness, 4-segment, or a general graphics display colour wheel (smaller

white segment), for improved colour reproduction.

projectiondesign Colour Wheel Options – p a g e 5

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Colour wheel configurations and projector model fit

application colour wheel recommendation Available for (order no.)

general ofﬁce applications,

business presentations High Brightness (4-segment, RGBW)

F1+ XGA

F1+ SXGA+

F3/F3+ XGA

F3/F3+ SXGA+

some visualization,

control room applications,

24/7 applications,

general multipurpose graphics display,

public display and POS installations

Graphics (4-segment, RGBW)

F1+ XGA

F1+ SXGA+

F3/F3+ XGA

F3/F3+ SXGA+

simulation, high end visualization Visualization and Simulation,

3-segment RGB, or 6-segment, RGBRGB

F1+ XGA-6

F1+ SX+3

F3/F3+ XGA-6

F3/F3+ SX+3

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