Report itu-r bt. 2053-2 (11/2009) L
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- 1.7 Summary
- 2 2k 1k display
- 2.2 JVC 2k 1k projector
- 2.3 Sony 2k 1k projector
- 3 4k 2k display
- 3.2 Sony 4k 2k projector
1.6 Projector efficiencyThe various deployed technologies have different optical efficiencies based on the type of lamp, the size of the lamp, and the application. In general, the imager size should be approximately the same size as the light-emitting source. This leads to certain trade-offs with respect to the type of lamp used and the life of the lamp. Furthermore, larger imagers can handle higher amounts of light (power) due to power dissipation capabilities. The following plots show a number of projectors grouped by technology and type of lamp. The first plot is efficiency vs. power, the second plot is efficiency vs. brightness, and the third plot is brightness vs. power. Only DLP projectors are available beyond 2 kW lamp power, or with light output greater than approximately 7 500 lumens.
Due to the nature of the commercially available projectors, any interlace content destined for large screen display will require processing prior to actual display. Because of the large screen display, and likelihood of close viewing distances (1-3 picture heights), all image processing should be performed with the highest quality possible. Compared to performing all processing at every point of projection, where appropriate, placement of a single processing device upstream of the distribution chain could lower the overall system cost and yield optimum quality image, with the processing quality fully under the control of the programme provider. The goal for equipment providers should be to move towards support for the high resolution (1 920 1 080), high frame rate (50/60 fps), progressive formats, included in Recommendation ITU R BT.709. 2 2k 1k display2.1 2k 1k DMD projectorsAs mentioned above, the new models of DMD projectors will soon be released from several manufactures. The projectors have a resolution of 2 048 1 080 pixels. As an example of the projectors, the specifications of the model of iS8-2k manufactured by NEC Viewtechnology, Ltd. is shown in Table 5. TABLE 5 Specifications of the iS8-2k projector
2.2 JVC 2k 1k projectorVictor Company of Japan, Ltd. (JVC) has introduced a projector with 2k 1k pixels in the home-theatre market14. The display imaging device, called D-ILA, is an LCoS with 1 920 1 080 pixels on a 0.8-inch imaging area. The light output is 500 lumens. 2.3 Sony 2k 1k projectorSony has also introduced a projector with 2k 1k pixels in the home-theatre market15. It uses three LCoS imaging devices, called SXRDs, with 1 920 1 080 pixels on a 0.78-inch imaging area. 2.4 Epson 2k 1k deviceSeiko Epson Corporation has developed a high-temperature polysilicon LCD panel for true 1 080p home theatre projectors16. The number of effective pixels is 1 920 1 080 on its 1.3-inch imaging area. The contrast ratio is 500:1. 3 4k 2k display3.1 JVC, CRL and NTT projectorsCommunications Research Laboratory (CRL) and JVC have jointly developed a display system with 2 000 scanning lines called Quadruple HDTV. The projector employs three LCD panels of 3 840 2 048 pixels. The light output of the projector is 5 200 lumens and the contrast ratio is more than 750:1. The resolution of this system corresponds to 2 2 times of 1 920 1 080 pixels. Nippon Telegraph and Telephone Corporation (NTT) has also developed a digital cinema system that can store, transmit, and display images of 2 000 scanning lines, with 10-bit each for RGB components. The projector of the system is the same as that of CRL-JVC. Image sources of the system are 35 mm motion films of 24 Hz and the system operates at a frame rate of 24 Hz or 48 Hz. The projector displays the images with a frame rate of 96 Hz in order to avoid the flicker disturbance. The resolution of this system also corresponds to 2 2 times of 1 920 1 080 pixels. 3.2 Sony 4k 2k projectorSony Corporation has developed a 4k projector for the digital cinema market17. The projector uses three liquid crystal on silicon (LCoS) imaging devices called SXRDs with 4 096 2 160 pixels on their 1.55-inch imaging area. Light output is 10 000 or 5 000 ANSI lumens. With SXRD technology, pixels are set at a pitch of 8.5 m with an inter-pixel gap of 0.35 m. Directory: dms pub -> itu-r -> opb -> rep rep -> Report itu-r m. 2243 (11/2011) rep -> Report itu-r m. 2038 Technology trends rep -> Report itu-r sa. 2312-0 (09/2014) rep -> Report itu-r rep -> Report itu-r sm. 2179 (09/2010) Short-range radiocommunication devices measurements rep -> Report itu-r rep -> Report itu-r rs. 2194 (10/2010) rep -> Report itu-r rs. 2165 (09/2009) rep -> Rep. Itu-r bs. 2104 Download 1.02 Mb. Share with your friends:
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