| D-ILA TM |
Direct (driven) Image Light Amplifier: Projected trademark of JVC. A technology for image formation in projectors on the basis of reflective modules. |
| Daylight |
Natural sun light or the emission of light with a colour temperature of 5.400 K up to 6.000 K. |
| Diagonal |
For 4:3 formats (SXGA, XGA, SVGA) the image width is= diagonal : 1,25 see image size |
| Dichroic mirror |
A selective mirror which only reflects a certain part of the light spectrum (a certain colour), however, which lets all other portions of light passing. Used for example in a colour divider system of a digital projector with 3 tubes. |
| Dichroic mirror technology (slide) |
The light source has a reflector, so that the beam hitting the slide in a right angle first hits the mirror then reflects the slide. The mirror has the feature to absorb a part of the heat radiation so that the slide is not affected by too much heat. |
| Diffuse (projection Screen) |
A reflection characteristic of projection screens. Diffuse reflective projection screens evenly scatter the incident light in all directions. The viewing angle is approx. 45 up to 60 degrees. The luminance factor is approx. 1.2. |
| Digital zoom |
A frame can be digitally x-times magnified |
| Dissolve (slide) |
Gradual change of an image into another with changing the brightness of two overlaying images. |
| Distortion |
Optical aberration particularly emerging with zoom lenses. Hence cushion or barrel distortions occur at maximum setting of the zoom lens. Due to the often built-in upwards projection this error is particularly eye-catching at the top side of the image. The better the lens the less the error. |
| DMD (TM) / DLP |
The DMD/DLP (Digital Light Processing) technology developed by Texas Instruments contains hundreds of thousands of microscopically thin mirrors (1/1.000 of a human hair) on a semiconductor chip that are controlled electronically. Due to a newly developed control electronics the reflective projection light for each pixel is focused either onto the optical system or to the "offside" which finally produces the image. The colour is produced by a three colour filter wheels rotating "in sync" with the image control. Three separate colour images are produced, one after the other, which appear as one true colour image due to the high velocity. With this technology the pixel structure can almost not be identified. Bright images and an even spread of light are other features of this new technology. |
| DRIT |
Digital Realized Interpolation Technology. Digital compression - and expansion processing from SANYO for full format images. |
| DVD |
Digital Versatile Disk, a new standard to save data on a CD ROM similar structure. Due to its high memory capacity the DVD is also able to digitally store movies. The quality is considerably better than S-VHS. |
| DVI |
Digital Visual Interface is a new transmission standard that enables the digital transfer of PC data to a monitor, plasma display, projector, etc. As there is no conversion to an analogue signal the image quality improves significantly. There are three different interfaces: DVI-D: Transmission of true digital informations; DVI-A: Transmission of true analogue informations; DVI-I: Transmission of digital and analogue informations. |
