2.12 Red Ramp test screen
This screen is used to test light border blemishes and bright pixels. All areas of the active area are colored at a specific gray level, based on MS Paint
| Major Dark Blemish |
Blue Value | 0 |
Red Value | Start 0,end 255 |
Green Value | 0 |
3. ACCEPTANCE REQUIREMENTS
3.1 Test Conditions (as tested in OEM projector)
·Projector degamma correction shall be linear. Using HD Control “Curtain” Mode is equivalent.
·Image noise reduction algorithms “Blue Noise STM” and “Boundary Dispersion” shall be set to “off”.
·Projector shall be used in front projection mode using a
·The diagonal size of the projected image shall be 52 inches (132cm).
·The projected image shall be inspected from a 60 inches (1.52 meter) minimum viewing distance.
·Projector will be properly focused on the DMD array as shown on the screen.
·Testing time is limited to 20seconds per screen.
·Refer to Table 1 for acceptance criteria, in specified order:
TEST | TEST | SCREEN | ACCEPTANCE CRITERIA |
ORDER |
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1 | Major Dark Blemish | Blue 90 | No dark blemishes visible on Blue 90 |
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2 | Dark Pixel | Blue 90 | 0 dark pixels allowed in Zone A |
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| Zoned Screen (see | <=2 dark pixels allowed in Zone B |
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| below figure 1) | No adjacent dark pixels |
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3 | Border Defects | Gray 10 | No border defects visible |
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4 | Major Light Blemish | Gray 6 | No light blemishes visible on Gray 6 |
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