Glossary
Following is an explanation of some of the terms used in this guide which may be unfamiliar or which were not explained in the text of this guide itself. Further information can be obtained by referring to other
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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Colour temperature | The temperature of an object which is emitting light. If the colour temperature is high, |
| the colours tend to take on a bluish tinge. If the colour temperature is lower, the colours |
| tend to take on a reddish tinge. |
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Component video | Video signals which have the video brightness signals and colour signals separated, in |
| order to provide better image quality. |
| In |
| signals: Y (luminance signal), and Pb and Pr (colour difference signals). |
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Composite video | Video signals which have the video brightness signals and colour 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 (colour) signal which are contained |
| in the colour 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 |
| lamp. After the lamp turns off, the cooling fan continues operating, but all button |
| operations are disabled. The length of time that this is happening is called the |
| 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 |
| which uses two speakers. Dolby Digital is a |
| to this a centre speaker, two rear speakers and a |
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|
HDTV | An abbreviation for |
| which satisfy the following conditions. |
| Vertical resolution of 750p or 1125i 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 |
| which 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 use to project computer images that have a resolution or more than or |
| less than the projector's panel resolution to be projected so that they fill the whole of the |
| projection area. |
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SDTV | An abbreviation for Standard Definition Television. It refers to standard television |
| systems which do not satisfy the conditions for |
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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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Appendices
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