JVC DLA-G20 Sales Manual Download | Manualshive

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Printed inJapan

XXX-0000

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Summary of Contents for DLA-G20

Page 1: ...Printed inJapan XXX 0000 ...

Page 2: ...od present condition and subject n Brightness basics n D ILA resolution n Installation conditions and throw distance n Throw distance n Table Relationship between screen size and throw distance n Stacking systems n Projection type front projection n Projection type rear projection n Installation n Operating precautions n System design ...

Page 3: ...the trade off between the high brightness and high resolution The D ILA multimedia projector is able to project a clear bright high resolution image onto a large screen Vivid images can be achieved even in a bright room High precision projection The D ILA device provides high resolution of 1365 x 1024 pixels enabling S XGA images to be projected without compression or loss of quality Horizontal re...

Page 4: ...age video signal are called gamma characteristics The straighter this curve the better the gradation expression ensuring more accurate gray scale reproduction If gamma characteristics are poor gradations cannot be expressed accurately resulting in flat black or white blurring on the screen To improve this gamma correction is carried out However this is difficult if the device itself has an extreme...

Page 5: ... signal Projection lens CRT Screen Both the maturity degree and compatibility with conventional systems are high With no pixel construction this method is easily fit to various signal forms To enhance the brightness the amount of beam is increased resulting in the lowered resolution and heat generation With a single panel this method is easily fit to the mass production As this is constructed with...

Page 6: ...ection area the larger the value of even when the value remains the same Similarly the larger the projection area the smaller the value of It is important to know the projection screen size when assessing the value If the value seems very high it may be based on a very small projection screen size Intensity is a measure of the amount of light reflected from the screen This is what people normally ...

Page 7: ...28 is shown on the document the data is correct classified as shown below In each case the reflection limit of the external light on the screen surface is shown as reference For actual installa tion the reflection amount on the screen should not exceed the values shown below m Fig 1 m Fig 2 Which is brighter 1000 or 2000 40 type 4 3 2000 would seem to be brighter However the measurement unit is di...

Page 8: ... resolution without compression or data loss This is what we mean by true S XGA Fig 1 The term S XGA equivalent on the other hand does not describe a true S XGA picture Instead it refers to projected image that is processed so that it resembles an S XGA picture Since LCDs in most LCD projectors can reproduce either 800 x 600 S VGA pixels Fig 2 or 1024 x 768 XGA pixels Fig 3 they are unable to hand...

Page 9: ...picture even when viewed from behind the projector DLA G20 Offset axis is not added to the projection optical axis The center axis of the lens is at the center of the screen horizontally and vertically Note The lens position shifts horizontally by 72 mm from the center of the unit Keep this in mind during installation DLA G20 DLA S15 Notes Be careful when demonstrating because the DLA S15 s lens s...

Page 10: ... use the value without making allowance for error Use this value as a guide when first discussing what screen size should be selected If you need the correct value refer to the table Relationship between screen size and throw distance on pages 18 to 21 Calculation example To determine the appropriate screen size refer to the table below The approximate relationship between screen size and number o...

Page 11: ... 92 7 94 11 2 11 6 12 0 12 4 12 7 13 1 13 5 13 9 14 3 14 6 15 0 15 4 15 8 16 2 16 5 16 9 17 3 17 7 18 1 18 5 18 8 19 2 19 6 19 93 20 0 16 8 17 4 17 9 18 5 19 1 19 7 Projection size Throw distance m Model inches diagonal Length m Wide 2 1 Tele 3 1 Width m Use the table below as a guide Because the lens generates a slight error do not use the maximum settings DLA G20 4 3 To obtain the projection siz...

Page 12: ...images are superimposed registration differences appear in the center and peripheral areas of the screen due to the lens distortion Use the center portion of the optical lens to minimize the registration difference This difference cannot be eliminated because it is caused by lens distortion The smaller the lens magnification the less the distortion Vertical stacking limit range The DLA M4000s can ...

Page 13: ...1 43 68 43 94 45 95 47 29 48 25 48 97 50 53 29 85 31 33 32 66 33 84 34 88 35 84 36 71 37 51 38 24 38 91 39 52 40 10 40 63 41 13 41 59 42 00 42 43 42 8 43 17 43 5 43 82 44 12 44 41 44 68 44 94 46 95 48 26 49 25 49 97 51 53 Screen size 4 3 Width Height Y 50 Y 51 Y 52 Y 53 X Y 54 Y 55 Throw distance 306 6 H 100 Screen upper edge Screen lower edge Horizontal stacking DLA M4000 x 2 Leave a space of mor...

Page 14: ... screen surface is white and there is almost no gain As the angle of visibility is close to the full diffusion of 180 this type is ideal for auditoriums and rooms with a theater style layout since the audience expands sideways as the distance from the screen increases The benefit of a white screen is more natural color reproduction if the room is dark or if the light output of the projector is suf...

Page 15: ...n 1 Strictly speaking full diffusion object obtained by burning magnesium on a aluminum plate is gain 1 In actual use Kodacolor standard white is gain 1 Normally gain means the peak gain The peak gain is the value at the point where the gain is the highest The higher the gain the brighter the screen On the other hand the angle of visibility becomes narrower Refer to the typical example showing the...

Page 16: ... direction Oscillation in the vertical direction Oscillation in the vertical direction Oscillation in the vertical direction Light from the projector Oscillation in the vertical direction External light reflection horizontally oscillating light is shut out with a polarizing film and does not pass through vertically oscillating light is reflected Only half of the external light is reflected Project...

Page 17: ...pes from the divided pixel panel interfere with the screen s lens pitch and black striping resulting in moiré pattern The extent to which this pattern is noticeable depends on the size of the projected image the screen s lens pitch and the panel s pixel division pitch Although the DLA S15 has divided pixels it has a high aperture ratio with very little cross striping moiré patterns are not normall...

Page 18: ...be noticeable Transportation delivery and construction are easy The screen moves with the air flow Picture is not very bright Soft Hard Type Single Fresnel lenticular Double Fresnel lenticular Double cross lenticular Dispersal agent hard type Dispersal agent soft type Maximum size 150 model 4 3 150 model 4 3 200 model 4 3 250 model 16 9 180 model 16 9 1000 model 4 3 Characteristics Single Fresnel ...

Page 19: ...ility of the DLA G20 Makes pan and tilt angle adjustment easy Enables easy assembly and installation Please note that the DLA G20 cannot compensate for trapezoid distortion m Ceiling hole position when installing the ceiling hanging metal fittings m Screen installation position with ceil ing mounted projector m Permanent installation on a table or shelf To prevent the projector from falling tippin...

Page 20: ...nd Subject 36 The light source lamp must be replaced periodically As a rough guideline the lamp should be replaced after about 1000 hours of operation When the lamp s operation time surpasses 900 hours the LAMP indicator on the projector lights When projection starts the lamp replacement message is shown on the screen for about 2 minutes Use a new light source lamp or prepare a light source lamp f...

Page 21: ...lock the ventilation openings Do not cover the projector with a cloth during operation in order to avoid increasing the temperature in the projector and do not place the projector near other equipment It may disturb the flow of air and cause an increase in temperature Small spaces may also hinder maintenance Before you place the projector refer to Installation on page 34 to 35 11 The light source ...

Page 22: ...d and locked In this case since screen shift occurs it is necessary to fine adjust the phase tracking and horizontal and vertical positions These can be adjusted automatically by pressing the Quick Alignment button to activate the auto setup function If auto adjustment is not satisfactory use the manual adjustment function Even though signals can be input because they are in the allowable frequenc...

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