Glossary
Following is an explanation of some of the terms used in this guide that may be unfamiliar or that were not explained in the text of this guide. Further information can be obtained by referring to other commercially- available publications.
Aspect ratio | The ratio between an image's length and its height. HDTV images have an aspect ratio of |
| 16:9 and appear elongated. The aspect ratio for standard images is 4:3. |
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Color temperature | The temperature of an object which is emitting light. If the color temperature is high, the |
| colors tend to take on a bluish tinge. If the color temperature is lower, the colors tend to |
| take on a reddish tinge. |
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Component video | Video signals that have the video brightness signals and color signals separated, in order |
| to provide better image quality. |
| In |
| signals: Y (luminance signal), and Pb and Pr (color difference signals). |
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Composite video | Video signals that have the video brightness signals and color signals mixed together. |
| The type of signals commonly used by household video equipment (NTSC, PAL and |
| SECAM formats). |
| The carrier signal Y (luminance signal) and chroma (color) signal that are contained in |
| the color bar are overlapped to form a single signal. |
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Contrast | The relative brightness of the light and dark areas of an image can be increased or |
| decreased in order to make text and graphics stand out more clearly, or to make them |
| appear softer. Adjusting this particular property of an image is called “contrast |
| adjustment.” |
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The cooling process for the projector's lamp unit continues even after the [Power] button | |
| on the projector's control panel or the remote control has been pressed to turn off the |
| projector. After the lamp turns off, the cooling fan continues operating, but all button |
| operations are disabled. The period of time during which this happens is called the “cool- |
| down period.” The |
| depending on the external air temperature. |
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Dolby Digital | A sound format developed by Dolby Laboratories. Normal stereo is a |
| that uses two speakers. Dolby Digital is a |
| this a center speaker, two rear speakers and a |
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HDTV | An abbreviation for |
| satisfy the following conditions. |
| Vertical resolution of 720p or 1080i or greater (p = progressive scanning , i = interlaced |
| scanning ) |
| Screen aspect ratio of 16:9 |
| Dolby Digital audio reception and playback (or output) |
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Interlaced scanning | A method of image scanning whereby the image data is divided into fine horizontal lines |
| that are displayed in sequence starting from left to right and then from the top to the |
| bottom of the screen. The |
| alternately. |
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Progressive | A method of image scanning whereby the image data from a single image is scanned |
scanning | sequentially from top to bottom to create a single image. |
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Refresh rate | The |
| extremely short time. Because of this, the image must be scanned many times per second |
| in order to refresh the |
| second is called the “refresh rate,” and is expressed in hertz (Hz). |
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Resize display | This function is used to project computer images that have a resolution of more than or |
| less than the projector's panel resolution, so that they fill the whole projection area. |
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SDTV | An abbreviation for Standard Definition Television. It refers to standard television |
| systems that do not satisfy the conditions of High Definition Television. |
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Security lock | A device consisting of a projector case with a hole in it that a |
| |
| pillar. This projector is compatible with the Microsaver Security System manufactured |
| by Kensington. |
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sRGB | An international standard for color intervals that was formulated so that colors that are |
| reproduced by video equipment can be handled easily by computer operating systems |
| (OS) and the Internet. |
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Appendix
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