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Editor's HDTV Pick

HP 47 inch MediaSmart 1080p LCD HDTV "Out of the box" digital media platform. Enjoy videos, pictures and music from home network + digital media delivered over your broadband Internet connection + 3 x HDMI

June 7, 2006 – Mitsubishi Digital Electronics America’s Presentation Products Division, introduced its new line of value LCD monitors, the LDT321V and LDT371V (32inch and 37inch respectively), specifically designed for video displays and moving text in retail environments, movie theaters, information kiosks and other commercial venues.

The monitors come with some important features for those undertaking commercial video display:

• more robust features than conventional plasma displays for improved durability and reliability
• performance characteristics designed for reflective glare situations
• inbuilt scheduling controls
• longer LCD panel warranty coverage
• extended warranty service hours and
• onsite service and repairs

The LDT321V and LDT371V have been designed to perform well in store windows, storefronts or any venue where bright ambient light can diminish video quality through reflective glare on the monitor surface. Importantly, the Mitsubishi LDT monitors/video displays can be seen through windows with minimal glare. The LCD technology provides the depth and detail necessary for the most demanding video environments.

“Our LCD monitors are designed to last longer and be more durable over time than regular plasma displays or regular flat panel TVs,” said Frank Anzures, product manager, Mitsubishi Digital Electronics America’s Presentation Products Division. “Anyone who wants to show vibrant and clear images in a commercial environment should consider them as the solution of choice.”

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Advantages of HDTV

• HD is digital, so the signal will either provide an excellent picture, a picture with noticeable pixilation, a series of still pictures, or no picture at all
• Most HD programming and films are 16×9 semi-widescreen format
• Colors generally look more realistic
• Visual information is about 2-5 times more detailed overall
• Increased clarity and detail better suit larger screen sizes
• Dolby Digital 5.1 sound is broadcast along with standard HDTV video signals allowing full surround sound capabilities.

High-Definition television (HDTV)

• has a higher resolution than the traditional formats such as NTSC, SECAM and PAL
• generally defined as 1080 active lines at a 16 : 9 aspect ratio however, in some countries any resolution with 720 or more active lines is considered HDTV
• is broadcast digitally
• has at least twice the resolution of Standard Definition TV (SDTV)
• is capable of “theater-quality” audio because it uses the Dolby Digital (AC-3) format to support “5.1″ surround sound

Definitions and Notation

Progressive: an image is scanned and displayed following a path similar reading a page of text: line by line, from top to bottom.

Interlaced: an interlaced scan pattern in a CRT (cathode ray tube) includes only every second line followed by an alternating scan of the gaps between the lines of the previous scan. The afterglow of phosphor of CRT tubes combined with the human eyes persistence of vision results in two fields being perceived as a continuous image.

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At the Los Angeles Home Entertainment Show Sony unveiled details on its 2006 lineup of SXRD (Silicon X-tal Reflective Display) equipped rear projection televisions. The lineup includes the 60inch Grand WEGA SXRD Rear Projection HDTV KDS-R60XBR1 and the 50inch KDS-R50XBR1

Sony built its proprietary SXRD technology on the existing LCoS technology combining liquid crystal (LCD) and silicon chip fabrication technologies to drastically reduce the size of pixels in a micro display and reduce inter-pixel space. These improvements have produced a line of televisions with a native High Definition TV resolution of 1920 pixels horizontally x 1080 pixels vertically. Not having to upscale resolution means superior, almost “film-quality” images.

Read our article Microdisplay Chips for Rear Projection Televisions to learn more about the technologies powering the new generation of rear projection HDTV televisions.

The new technology chip powering Sony’s rear projection television sets is a miniscule 0.78 inches diagonally, has some 2 million pixels of 9um pitch spaced 0.35um apart and manages to produce full HDTV. Sony believe that this inter-pixel spacing is the world’s smallest. This is a 2.4- fold increase in pixel density, and a 10-fold improvement in inter-pixel spacing compared to high temperature Poly-Silicon liquid crystal devices.

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“Microdisplay” refers to the one or more microchips containing millions of pixels being used for the new generation of rear projection televisions. Digital Light Processing (DLP), Liquid Crystal Display (LCD), and Liquid Crystal on Silicon (LCoS) are the three competing chip types. Constant improvements to each technology from its supporters have narrowed the differences them.

Microdisplay rear projection televisions are opening up a less expensive option to widescreen plasma and LCD screens.

Digital Light Processing (DLP)

Texas Instruments DLP technology, is fabricated silicon chips with anywhere from 800,000 to more than one million tiny, electromechanical mirrors. The microscopic mirrors move (vibrate) to reflect the correct amount and color and light for each screen pixel. Texas Instruments, the sole technology supplier, supplies numerous DLP chip models to television (and projector) manufacturers including Samsung, Toshiba, Mitsubishi, Panasonic and LG.

Because of DLP chips lightening fast response time in varying the light for each pixel, DLP microdisplay rear projection televisions can use a single chip combined with a color wheel configuration. In comparison, LCDs require a three-chip configuration because of their slower response times.

The DLP projection configuration involves light from a projection lamp passing through a color wheel, the different segments of which provide the primary (red, green and blue + sometimes white) colors. The primary colors shine sequentially onto the DLP chip where each micro-mirror reflects the correct amount of light for each pixel out through the projection lens. The technology relies on the stream of sequential colors being fast enough that the slow response time of the human eye blends them together into a single combined color for each pixel.

A commonly reported problem with early DLP technology, “rainbow effects” (brief steaks of color some people can detect resulting from their perception of the sequence of red, green and blue colors from the color wheel), has been significantly reduced with the advent of faster, more segmented color wheels.

Other DLP technology improvements have been announced by Samsung (LED light source instead of traditional lamp) and Mitsubishi (laser powered DLP). See our article New Generation of DLP Rear Projection TVs for more details.

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Ayesha McAdams-Mahmoud reported recently on Herald Online on the “Classroom of the Future” at the Riverview Elementary School, Fort Mill where teachers and students incorporate interactive whiteboards in their lessons. It’s apparent from the article that once experienced by teachers and students, electronic or interactive whiteboards are considered an indispensable asset.

Click here to read this revealing article.

eBeam Projection is a compact, portable device that can turn your wall or whiteboard into an electronic interactive whiteboard.

The eBeam receiver can be attached to any flat surface. The receiver is small (6 inches across) and light at 4.5 ounces. It can activate an area up to 8′ x 4′ (2.40m x 1.20m) ,equivalent to 107″ diagonal, and set-up and calibrated in a matter of minutes.

The small, lightweight, and comfortable pen holders (act like a computer mouse) fit a whiteboard marker and feature the ability to left-click and right-click. There is also a special button for accessing on-screen tool palettes. The positioning resolution of the pen holders is +/- 1.5mm. The included eraser unit erases lines on the software (projected) whiteboard at the same time as you erase on your actual whiteboard. A quick-launch sticker which attaches to your whiteboard allows you to perform tasks such as printing pages and starting new ones without having to access the software via your computer.

The free included eBeam Scrapbook software with features to allow:

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According to Infocus the Learn Big IN24 and IN26 DLP technology Projectors are “built with business and education in mind”.

Both projectors are based on Texas Instruments DLP technology with the IN26 having a higher resolution capable chip: 0.55″ SVGA DDR DMD (IN24) and 0.55″ XGA DDR DMD (IN26). The IN24 has an SVGA (800×600 pixels) native resolution and the IN26 an XGA (1024×768pixels) native resolution. The IN26 is a better match to the most common notebook native resolution - XGA, which means the projector will not have to down convert the data.

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How small can projectors go? Really small, if the palm size PK-20 PocketProjector Mitsubishi has was showing off at the recent InfoComm show in Orlando is a guide. This ultra-portable also boasts a very long lamp life, quick-on and quick-off functionality and the ability to run off batteries. Virtually any device with a video-out can be connected and projected. A convenient SD card reader allows instant set-up for presentations or sharing images.

At 1 lb(450 grams) and dimensions (W x H x D) of 123mm x 47mm x 97mm (4.85” x 1.85” x 3.85”) the unit literally fits in palm of your hand.

The key technology delivering some of this units breakthrough features is Philips Lumileds’ LUXEON technology which enables Light Emitting Diodes (LEDs) to match the brightness of conventional light sources and for the first time, making it possible to replace the traditional halogen bulb with smaller, longer-lasting and more energy efficient LEDs. The LEDs in this unit are rated to last more than 10,000 hours. A secondary benefit of LEDs is (read more..)

The PT-5600 and PT-DW5000 were two of four new large venue DLP projectors introduced at InfoComm 2006 on June 6, 2006. According to Panasonic, “they are ideal for classrooms, conference rooms, control rooms and churches”.

Both projectors also have a single DLP chip and a 2000:1 Contrast ratio

Also included, is Panasonic’s BrightOpticTM Dual-Lamp technology which according to Panasonic “increases brightness and eliminates the need to interrupt a presentation if a lamp burns out (in dual-lamp operation mode). In single lamp mode, the lamp auto changer function allows non-stop 24/7 operation.”

For increased reliability each model also includes Panasonic’s liquid-cooling system that directly cools the DMD chip. Operating noise is also reduced by the lesser number of fans required with the liquid cooling system.

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BenQ’s PE7700 DLP Projector has pulled in some good reviews and ratings including “What Cinema’s award of “Product of the Year 2005-2006”.

Released March 2005, the PE7700 is a High Definition (HD) ready DLP projector with 1280×720 pixel native resolution, 1100 ANSI lumens brightness, 2500:1 contrast, native 16:9 widescreen format and a 5x speed six-segment color wheel.

The 1100 brightness puts it in the home cinema category for use in a dark or dimly lit room so that light does not wash out the screen image.

Texas Instrument HD2+ chip was a late 2003 improvement to DLP technology Texas Instruments state that the chips new fabrication process allows onscreen images to appear even more ‘film-like’, delivers contrast ratio improvements and some increase in brightness.

The 5x speed, six-segment color wheel is included to minimize rainbow effects inherent in DLP technology. This color wheel increases the number of bits used to process green light reducing ‘dithering’.

(read more..)