Appendices > Glossary
Refresh Rate | The |
| same luminosity and colour for an extremely short |
| time. For this reason, the image must be scanned |
| many times per second in order to refresh the light- |
| emitting element. The number of refresh operations |
| per second is called the "refresh rate", and is |
| expressed in hertz (Hz). |
|
|
Resized display | This function is used to project computer images that |
| have a resolution more than or less than the |
| projector's panel resolution, so that they fill the |
| whole of the projection area. |
|
|
SDTV | An abbreviation for Standard Definition Television. |
| It refers to standard television systems which do not |
| satisfy the conditions for |
|
|
Security | A device consisting of a projector case with a hole in |
lock | it that a |
| cable can be passed through in order to secure the |
| device to a table or pillar. This projector is |
| compatible with the Microsaver Security System |
| manufactured by Kensington. |
|
|
Squeeze | The method of compressing 16:9 Widescreen images |
mode | and recording them on video software as 4:3 images. |
| When projecting with Squeeze mode on, the images |
| will return to their original 16:9 format. |
|
|
sRGB | An international standard for colour intervals that |
| was formulated so that colours which are reproduced |
| by video equipment can be handled easily by |
| computer operating systems (OS) and the Internet. |
|
|
64
SVGA | A type of video signal with a resolution of 800 |
| (horizontal) ⋅ 600 (vertical) dots which is used by |
| IBM |
|
|
| A type of video signal which has the video |
| brightness and colour signal information separated, |
| in order to provide better image quality. It refers to |
| images which consist of two independent signals: |
| Y(luminance signal), and C (colour signal). |
|
|
Sync. | The signals output from computers have a specific |
(Synchronisation) | frequency. Image quality will suffer if the projector |
| frequency and the computer frequency do not match. |
| The process of matching the phases of these signals |
| (the relative position of the crests and troughs in the |
| signal) is called "synchronisation". If the signals are |
| not synchronised, problems such as flickering, |
| blurriness and horizontal interference can occur. |
|
|
Tracking | The signals output from computers have a specific |
| frequency. Image quality will suffer if the projector |
| frequency and the computer frequency do not match. |
| The process of matching the frequency of these |
| signals (the number of crests in the signal) is called |
| "tracking". If tracking is not carried out correctly, |
| wide vertical stripes will appear in the projected |
| images. |
|
|
VGA | A type of video signal with a resolution of 640 |
| (horizontal) ⋅ 480 (vertical) dots which is used by |
| IBM |
|
|
XGA | A type of video signal with a resolution of 1,024 |
| (horizontal) ⋅ 768 (vertical) dots which is used by |
| IBM |
|
|