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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

The Optoma TX7155 DLP business projector has a thoroughbred specification which when combined with its reasonable pricing is the value for money formula that marks a best selling product. The TX7155 DLP projector sits in Optoma’s business projector line but, it has also proved popular with gamers.

Placing it in the category of a portable projector are its small form factor and light weight at 3.2 lbs (1.45 kg).

For the business traveller who may have to make a presentation in less than optimum environments with high ambient light levels, the Optoma TX7155 can pump out up to 2500 ANSI lumens. It should handle most typical business application. Contrast ratio is good at 2500:1 however it is a Full On/Full Off figure which will be much higher than what the static contrast ratio would be but, it does give a basis for comparison.
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Do I Need to Calibrate my HDTV?

Few consumers have a real need for a professional display calibration. What may lead many to believe they do are the default picture settings HDTVs are shipped from the factory with. Default factory setting are generally formulated for maximum impact on display at a consumer electronics store. Factory settings are commonly formulated for maximum brightness and contrast for the bright ambient light conditions in a store. Additionally color saturation may be boosted and sharpness adjustments tweaked upwards. When home in the living or entertainment room with a different viewing environment the default settings can look overdone.

Fortunately, the majority of HDTVs come with a number of quick select display modes that have been professionally calibrated for various video sources and viewing situations. Getting a good picture is simply a matter of selecting the appropriate setting for your viewing situation and video source.
Professional display calibrations are something to think about for high-end, expensive equipment. An expensive home theater installation is a logical candidate for professional calibration. If your viewing situation is not optimal then calibration is a waste of money.
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Epson’s PowerLite 1705c projector is based on 3LCD technology and has the color accuracy, excellent color saturation and image quality that comes with it. Importantly, rated at 2,200 ANSI lumens it has the brightness to cope with higher ambient light situations, such as a well lit meeting room, in which one may be required to make a business presentation. The contrast ratio of 400:1 is not impressively high but, more than adequate given the intended use.

The Epson PowerLite 1705c is compatible with an XGA (1024 x 768, aspect ratio: 4:3) computer monitor resolution as would be expected of a business projector but, will also handle 720p and 1080i. At only 3.7 lb the 1705c is a very portable solution. You don’t have to connect a PC to make a presentation as there is a USB 2.0 port for loading your PowerPoint or video presentation. You can however, connect up to two PCs if you need to.

A bonus feature with the 1705c is 802.11 a/b/g wireless capable (up to 54 Mps) making it possible to stream content to the projector over a wireless network connection. A wireless connection is also convenient for monitoring and control. In fact, the 1705c will send maintenance and diagnostic reports automatically over a wireless network.

Set-up flexibility is always a desirable trait in a business projector. The PowerLite 1705c has automatic digital keystone correction which will handle an offset angle in the vertical plane between +/- 40 degrees. There is no horizontal correction available so the projector must be able to be positioned directly in front of the projection screen. However, there is some adjustment flexibility with regard to distance from the projection screen with a zoom ratio of 1:1.2. Unfortunately, the projectors noise level at full brightness is reasonably high at 40dB, particularly for an LCD projector. At a lower brightness, economy setting (1700 lumens) the 35dB rating is more acceptable

For the convenience of the presenter, a source search function automatically displays connected input source(s). The PowerLite 1705c comes with a well equipped remote control with mouse emulation functions and an electronic pointer. For security there is Kensington style lock provision and password protection. There is also a small 1W onboard speaker.

It’s always good to have a business projector which will start quickly (5 seconds for the 1705c) and shut down without an extended cool down time being required. The Epson PowerLite 1705c has an Instant Off feature for fast shut down.

Epson have a longer than usual two year limited warranty. The lamp warranty is however, fairly standard at 90 days. Epson’s Road Service program will provide a replacement projector typically within 1 business day.

What’s Included

• PowerLite 1705c Multimedia Business Projector
• Power Cable
• Remote control with batteries
• Wireless 802.11 a/b/g module
• Computer cable
• Audio adapter cable
• USB cable
• Owners manual
• EasyMP Software CD-ROM
• Start Here Kit
• Soft carrying case.

Connections

Composite Video, S-Video, Mini DIN, Component Video, Mini D-sub 15pin (in common with Analog RGB connector), USB 2.0 type B, Audio Stereo mini jack.

Resources

Epson PowerLite 1705c Catalog Sheet (pdf)

Users Guide PowerLite 1705c (pdf 5.3MB)

Tips for Selecting a Portable Business Projector

Projection Screen Selection Guide

Tips for Extending Projector Lamp Life

Guide to Replacement Projector Lamps and Bulbs

User Reviews and Price Comparisons

Epson Powerlite 1705C Wireless Multimedia Projector- 3.7 lbs

Lamp Module Powerlite 1700C/1705C/1710C/1715C

Projector-Gear Projector Ceiling Mount fits EPSON PowerLite 1705 1705c Projector

Epson PowerLite 1705C - LCD projector - 2200 ANSI lumens - XGA (1024 x 768) - 4:3 - High Definition - 802.11a/g wireless

Epson PowerLite 1705c projector

Epson 1705c White 3LCD Mac Display Built-in Speakers

EPSON ELPLP38 Projector Replacement Lamp for Powerlite 1700c 1705c 1710c & 1715c

The HD71 and HD65 share the same DLP projection microdisplay and most features. The HD65 has 1600 ANSI lumens brightness which is at the top of the range of what would be expected for a home theater projector while the HD71 has a lamp which produces 2400 lumens in line with Optoma’s promotion of the projector as a crossover between a home theater and business projector.

Both projectors have a single 0.62 inch DarkChip2 DLP chipset and associated color processing technologies from Texas Instruments including BrilliantColor. The color wheel is 6x speed which is faster than usual and should provide even further protection from rainbow effects which DLP projectors can be prone to. The native high definition resolution is 720p (1280×720). The Full On/Full Off contrast ratio is 3000:1 while in ImageAI Mode it is 4000:1.
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Epson’s E-TORL lamp’s innovative design makes it smaller, cooler running, more efficient and brighter than an ordinary lamp.

As can be seen in the comparison image, light emitted from the burner’s electrodes hits the reflector and is reflected into the optic lenses to pass on to the LCD panels (3x) for projection. An ordinary lamps parabola-shaped reflector actually leaks a sizeable portion of the lamps light rather than reflecting it into the optical train.

With their new E-TORL lamp design, Epson have replaced the parabolic reflector with an elliptical reflector combined with a twin sub-reflector unit which collects light which would be otherwise lost and redirects it back to the rear elliptical reflector and into the optics. This design change has achieved a 20% improvement in efficiency making the light output brighter and reducing the waste heat which resulted from lost light in the ordinary lamp design.

Resources

Projection Screen Selection Guide

Tips for Extending Projector Lamp Life

Guide to Replacement Projector Lamps and Bulbs

Epson’s PowerLite Home Cinema 1080 UB is the replacement for the excellent Epson PowerLite Home Cinema 1080. The Home Cinema 1080 UB is however, a jump up rather than a step up in performance. The price hasn’t jumped though, making this projector a market leading value for money proposition for home theatre shoppers.

The Home Cinema 1080 UB has a native 1080p (1,920 x 1,080 pixels) resolution and is powered by a 3LCD technology projection engine. Conveniently it will support the 24 fps of movies. The UB in the model number stands for Ultra Black and this is evidenced by the staggeringly high contrast ratio of 50,000:1 (dynamic) and 4,000:1 (static). Projector brightness at 1600 ANSI lumens is at the top end of what could be expected for a home theatre projector.
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Epson’s D7 high-temperature polysilicon (HTPS) LCD panel shrinks from 0.9 to 0.7 inches in width but balloons in capability compared to the previous D6 also used with their 3LCD technology. The new 1080p Full HD panels have significantly higher contrast ratios, smoother images and deeper black reproduction capabilities.

Seiko Epson Corporation’s (Epson) new panels use innovative high resolution technology to achieve a 20% improvement in aperture ratio (ratio of lit pixel area to area blocked by the transistor driving each pixel) compared to conventional Twisted Nematic LCD Panels (nematic liquid crystal rotates light 90 degrees as it passes through). So, Epson have both reduced the panel size and increased the proportion of panel area allowing light through. This makes it possible for manufacturers to achieve higher luminance with the same projector lamp or reduce the lamp wattage for the same result.
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Epson’s Home Cinema 1080 projector is near identical to the more expensive PowerLite Pro Cinema 1080 (model sold by projector installation specialists) with only some extra functionalities missing. It’s an excellent value for money Full HD, 1080p projector confirmed by its time in the Amazon Top Selling Home Theatre Projectors list.

A good contrast ratio is an important factor contributing to a good image and the 12,000:1 contrast ratio of the Home Cinema 1080 delivered by Epson’s Absolute Black technology is excellent. Lamp power is 1200 ANSI lumens which is reasonably bright for a home theatre projector but, does require a light controlled environment.
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The Sony BRAVIA Z series LCD HDTV models are available in either gloss piano black (KDL-46Z4100/B and 40Z4100/B) or brushed metal (KDL-46Z4100/S and 40Z4100/S). Z series models also feature a distinctive, very thin surrounding bezel. With native Full HD (1080p, 1920 x 1080 pixels) high definition content doesn’t need any downconverting so video from Blu-ray Disc players or PlayStation 3 systems is going to look its very best. Contrast ratio is an essential factor of picture quality and the Z models have excellent qualification with 3,000:1 static and 30,000:1 dynamic contrast ratios.

The Z models are the premium of Sony’s non-XBR LCD HDTVs. They share all the high end features of the W series (one step down the features ladder) including Motionflow 120Hz technology which smooths any motion blur with fast moving on screen action and removes any judder associated with the viewing of video shot at 24fps.
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Display panels, whether they be LCD or plasma, are all composed of large numbers of pixels. The number varies with the display’s resolution which is a measure of the number of horizontal rows and vertical columns of pixels.

Each pixel is made of three individual green, red and blue (RGB) subpixels. A display’s electronics control the intensity of each subpixel to mix an overall color for that pixel. The number of discrete levels of intensity with which each subpixel can be varied corresponds to the bit-depth of each subpixel color. A single 8-bit subpixel can produce 256 (2*8) discrete levels of intensity and a 10-bit subpixel 1024 (2*10) discrete levels. The combination of variations of intensity levels of individual green, red, and blue subpixels within a single pixel enables the reproduction of (256)*3 = 16,777,216 and (1024)*3 = 1,073,741,824 for 8-bit and 10-bit displays respectively. This translates to an increase in the number of reproducible colors by 64 times from an increase of 2 bits per subpixel bit-depth increase from an 8-bit to a 10-bit display panel.
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