JVC DLA-G20 Sales Manual Download

Page: 13 / 22

D-ILA Method Present Condition and Subject

The basic setup for a horizontal stack configuration is shown below.

Screen size (4:3)

100

110

120

130

140

150

160

170

180

190

200

Width

1626

1829

2032

2235

2438

2642

2845

3048

3751

3454

3657

3861

4064

Height

1219

1372

1524

1676

1829

1981

2134

2286

2438

2591

2743

2896

3048

1540.1

1747.47

1954.85

2162.23

2369.6

2576.97

2784.34

2991.71

3199.08

3406.44

3613.81

3821.17

4028.54

Lens top point

80
85
90
95

100
105
110
115
120
125
230
135
140
145
150
155
160
165
170
175
180
185
190
195

250
300
350
400
450

1626
1727
1829
1931
2032
2134
2235
2337
2438
2540
2642
2743
2845
2946
3048
3150
3751
3353
3454
3556
3657
3759
3861
3962
4064
5080
6096
7112
8128
9144

1219
1295
1372
1449
1524
1600
1676
1753
1829
1905
1981
2057
2134
2210
2286
2362
2438
2515
2591
2667
2743
2819
2896
2972
3048
3810
4572
5334
6096
6858

2368
2520
2672
2825
2976
3129
3281
3433
3585
3738
3890
4042
4194
4347
4499

25.15
23.67
22.34
21.16
20.12
19.16
18.29
17.49
16.76
16.09
15.48
14.90
14.37
13.87
13.41
13.00
12.57
12.20
11.83
11.50
11.18
10.88
10.59
10.32
10.06

8.05
6.71
5.75
5.03
4.47

24.85
26.33
27.66
28.84
29.88
30.84
31.71
32.51
33.24
33.91
34.52
35.01
35.63
36.13
36.59

37.43

37.8

38.17

38.5

38.82
39.12
39.41
39.68
39.94
41.95
43.29
44.25
44.97
46.53

25.85
27.33
28.66
29.84
30.88
31.84
32.71
33.51
34.24
34.91
35.52
36.10
36.63
37.13
37.59
38.00
38.43

38.8

39.17
39.50
39.82
40.12
40.41
40.68
40.94
42.95
44.29
45.25
45.97
47.53

26.85
28.33
29.66
30.84
31.88
32.84
33.71
34.51
35.24
35.91
36.52
37.10
37.63
38.13
38.59
39.00
39.43
39.80
40.17
40.50
40.82
41.12
41.41
41.68
41.94
43.95
45.29
46.25
46.97
48.53

27.85
29.33
30.66
31.84
32.88
33.84
34.71
35.51
36.24
36.91
37.52
38.10
38.63
39.13
39.59
40.00
40.43
40.80
41.17
41.50
41.82
42.12
42.41
42.68
42.94
44.95
46.29
47.25
47.97
49.53

28.85
30.33
31.66
32.84
33.88
34.84
35.71
36.51
37.24
37.91
38.52
39.10
39.63
40.13
40.59
41.00
41.43
41.80
42.17
42.50
42.82
43.12
43.41
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

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 more than 340 mm

Screen upper edge

Screen lower edge

Stacking by suspending

from the ceiling (DLA-M15 x 2)

Stacking on the floor (DLA-M15 x 2)

Important:

•

Depending on the screen characteristics, different viewing angles can produce variations in illumination and color tone.

Be sure to take this into consideration when selecting the screen. Consult your JVC dealer for more information

regarding screen selection. The type of screen you use is especially important if you are using rear projection.

D-ILA-M4000 1:1 lens throw distance table

If you need a compact, high-intensity projection system,

you can stack two DLA-M15s in a vertical configuration.

When two DLA-M15s are stacked on a dedicated

stacking platform and the two projection images are

superimposed with the manual lens shift function, doubled

brightness can be obtained. Available dedicated stacking

platforms include a ceiling type and floor type.

Note:

As the two projection 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.

D-ILA-M15 stack shift table

2. DLA-M15 stacking system

Note:

•

This table is based on the assumption that two DLA-M15s are stacked on a stacking table.

When the offset axis of unit A is X% and that of unit B is Y%, X is obtained with Y = 50 to 55 in the formula

X = 306.6/H x 100 (provided that the offset axis of the DLA-M15 is 30 to 55%).

Stacking systems

Vertical stacking limit range:
The DLA-M4000s can be stacked within the area from the screen
upper edge to the lower edge.

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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