| P-Bus interface (Kodak) (slide) |
The RS 232 standard interface (P-Bus) enables a communication exchange between projector and PC. Slide projectors can be programmed and controlled directly via PC. The command language is the KODAK EKTAPRO-P-COM protocol. The integrated micro processor in the Ektapro-projectors controls and coordinates all required functions. |
| PAL |
"Phase Alternation Line". A colour television principle developed by W. Bruch which is used in most parts of Europe with the exception of Czech Republic, Slowakia and France. The resolution is 625 lines, the frame rate 50 half images per seconds, the aspect ratio is 4:3. The enhancement is PAL Plus. |
| PAL Plus |
Enhancement of PAL with an aspect ratio of 16:9 and improved signal processing. |
| Parallel projection (slide) |
Several projectors are operated in parallel (simultaneously). |
| PCI-Bus |
Stands for" Peripheral Component Interconnect Bus". Along with ISA, EISA, Microchannel, LocalBus and AGP another slot/BUS in the PC area. Unlike AGP-Bus the PCI-Bus also accepts other add-on cards than graphic cards. |
| PCMCIA |
"Personal Computer Memory Card International Association". International standard committee for credit card sized add-on cards for notebooks and digital cameras. Apart from memory cards there are also modem -, sound - and video cards in the PCMCIA format. |
| PDF |
Abbreviation for "Portable Document Format". This format is platform independent. |
| PIP |
Picture in Picture. Several sources can be projected at the same time, i.e. simultaneous projection of a data - and a video source. |
| Pixel |
"Picture Element". Smallest triggerable image part. |
| Pixel frequency |
Number of triggered pixels per second. |
| Pixel-Shifter |
A screen saver function in plasma displays. It is used to reduce the burn-in risk respectively burn-in effect. The pixel-shifter moves the image content in a pre-determined pattern over the display in certain intervals. |
| Plasma Display |
A new display technology. Each pixel consists of one tiny chamber which is filled with noble gas. This mixture of noble gas is lit by electronics. The emerging ultra-violet radiation stimulates the phosphor layer to illuminate. |
| Pointer |
Red dot or pointer which is inserted into the projection image via remote control thus attracting the attention of the audience. |
| Polysilicon technology |
This technology is using polycrystal silicon which has much better electrical and optical features than TFT display. The lamp performance can be reduced but still a higher light output can be achieved. Today, lamp performances under 200 Watt up to 2.400 ANSI lumens are possible. The modules are significantly smaller than TFT modules. Currently, 0.7 inch up to 1.8 inch diagonal is dominating. However, solely 3 chips are used because the colour filters can not be integrated in the chip. The colour separation is made via dichroic mirrors. Advantages: High brightness, strong colours, small light devices. Disadvantages: Gamma correction required, good convergence necessary. The modules are therefore often glued on the prism block. |
| Portrait mode |
Plasma displays are normally mounted horizontally. Some models, however, can be mounted vertically (portrait). For this application a special graphic card or the appropriate video material has to be used. |
| Progressive scan |
Progressive scanning of the video signal consisting of two half images. Both half images are added to one full image. Thus subtle structures can dissolve. |
| PS/2 interface |
Apart from serial and USB interface, another standard for the connection of PC keys and PC mice. |
| PSI polysilicon technology |
See polysilicon technology. |
