Mitsubishi I-Miev an electric car

If there is any question about whether or not Mitsubishi is serious about the battery electric car, of course. Of all the vehicles that have been adapted from a conventional gasoline vehicle, the "i" MiEV is perhaps the closest to being not only a practical substitute for a family-sized electric runabout but also one of the neatest integrations of electric car technology I've seen. This vehicle is displayed at Auto expo 2008 in newdelhi.

Where the "i" normally would have a 660cc turbocharged gasoline engine and fuel tank, the MiEV instead sports a 47 kw permanent magnet synchronous electric motor mounted in the rear, above which is positioned the controller. Buried neatly into the belly pan of the vehicle is a lithium-ion battery pack consisting of 22 large format modules developed by GS Yuasa Corporation in Japan. The 330-volt system has an energy capacity is 16kWh, which is the same capacity as GM is planning for its own 4-passenger, range-extended electric Volt concept car. But where the i MiEV has a projected electric driving range of 100 miles (160km), the Volt's target EV-only mode is 40 miles, with a flexible fuel engine reserve of some 580 additional miles.

The i MiEV is no acceleration sluggard, either. It's electric motor provides 180Nm of torque. Acceleration is 31% quicker and its noise level is some 5db quieter than the typical gasoline minicar. Seating four, it weighs 1,080kg (2380 lbs) and has a top speed of 130km/h (80 mph). Using the Japanese 10-15 mode driving cycle and the country's current grid power mix, which is heavily reliant on nuclear power, the MiEV demonstrates a whopping 72% reduction in CO2 emissions compared to the gasoline "i".

In terms of operating costs, Mitsubishi estimates that using off-peak power at night means it will cost 1/9th the cost of fuel for the gasoline model; and even using daytime power rates, it is still one-third the cost of its petroleum-dependent sibling.

The car can be recharged using normal household current at 100 volts (taking approximately 14 hours to recharge), 200 volts (7 hr recharge time) and 3-phase 200 volt. In the latter case, it would take only 30 minutes to recharge the vehicle to 80 percent SOC (state-of-charge) using a Quick-charge system. The charger is built into the vehicle, the 100 volt female plug on the right rear, the 200 volt receptacle on the left rear (see photo below).

Mitsubishi has joint research programs evaluating the everyday practicality and quick-charge compatibility of these carswith three electric utilities in Japan: Tokyo Electric Power, Chugoku Electric Power and Kiyushu Electric Power. The company hopes that it can expand the number of vehicles in operation in Japan to as many as 30 in 2008. Assuming these tests are successful, Mitsubishi hopes to begin mass manufacture of the MiEV initially for the Japanese market in 2009. The company is also looking at offering the vehicle in England.

Mitsubishi laser TV

It's hardly a compliment to be called a lightweight, except if you happen to be a 62-inch rear-projection 1080p laser TV.

Consumer electronics giant Mitsubishi now hopes to combine the inherently large size of a rear-projection unit into a sleeker, lighter-weight product and pack it with enough advanced technology to out-dazzle the rest of the HD pack, although consumers may have to wait a while to see this next-gen version of DLP for themselves.

Since last winter, Mitsubishi has been trickling out details of what it unofficially is calling "Laser TV," citing it as a breakthrough in existing DLP (digital light processing) that it believes will eventually move HDTV one step further to perfection cosmetically and technologically, through the use of colored lasers.

DLP, a registered trademark of Texas Instruments, traditionally uses white-light mercury bulbs. Mitsubishi's new system, instead, uses separate red, green and blue semiconductor lasers in combination with an HD chip, which those who have seen a real-world demo (mostly dealers and Mitsubishi employees) say provides richer and more complex colors and hues, and noticeably more distinct HD clarity and depth-of-field.

Mitsubishi contends that lasers also prompt a more realistic manifestation of "black" than current DLP, plasma, LCD or CRT screens. Lasers purportedly shut off totally when not needed, frame-to-frame, creating a more natural blackness. (In contrast, today's DLP mercury bulbs do not completely blink off, according to Mit-subishi.) Today's DLP units without colored lasers already produce at least 16 million color variations, including 124,000 shades of gray, according to TI.

SOPHISTICATED LIGHT

The key component of non-laser DLP technology is an optical semiconductor (a Digital Micromirror Device or "DLP chip"), invented by TI nearly 20 years ago. It has called the chip "probably the world's most sophisticated light switch," with up to two-million hinge-mounted microscopic mirrors less than one-fifth the width of a human hair.

When the DLP chip is synchronized with a digital video signal, light source and projection lens, its flexible mirrors reflect digital images to a screen. The microscopic mirrors can reflex (blink on and off) a few thousand times per second. Much of TI's proprietary technology will be used with Mitsubishi's Laser TV, but source lighting from mercury bulbs will be replaced by the lasers.
It appears there is only one working Laser TV screen in existence for demo purposes for now; Mitsubishi is hesitant to show it off at trade shows because it still lacks suitable cabinetry and other non-technical aesthetics. A non-working cosmetic sample (see photo) of a 62-inch unit--along with the sole working screen demo--were featured at Mitsubishi's annual line show for dealers at its Huntington Beach, Calif., headquarters in April.

"We did display a working sample that was not in a finished cabinet [to] prove that we could produce a good HD picture in a finished cabinet using our laser technology," said Marty Zanfino, director of product development at Mitsubishi. Zanfino said the 62-inch diagonal screen will boast a depth of only about 10 inches and not require very much framing around the screen because advanced plastics will replace glass components in the rear projector, making the large unit lighter. (Plastics have replaced heavier glass casings in some current DLP products, as well.)
Consequently, he said, today's typical heavy-duty screen frames will not be necessary, and may be no wider than an eighth of an inch. The lighter overall weight will allow for a lower center of gravity; nearly the entire frontage can be devoted to screen surface. Thus, the Laser TV units will occupy a more compact footprint and allow sleeker cosmetic designs that could set the product apart from the rest.

But HDTV is usually about the picture--not weight or even design--and Mitsubishi is confident this is where Laser TV will excel.

"The color gamut is significantly larger because the lasers are so intense," Zanfino said. He compares its optimum video quality as being equal or superior to 35mm film. Zanfino said although prices will not be announced until the product is released, when asked, he acknowledged that Laser TV probably will start off somewhat higher-priced than today's DLP and plasma units: "We'll see, but lasers cost more than mercury bulbs."

Advantages

One major claim of laser advocates is the ability to produce undiluted, perfect colors allowing precise hue mixing. With the color enhancement capable with lasers, up to 90% of the visible spectrum can be displayed.Other improvements that laser advocates claim are bulbs that will never blow out, and increased efficiency by using two-thirds less power than traditional rear projection televisions. Historically, however, lasers have been too bulky and expensive for widespread adoption.
The laser technology advocates claim that the technology will allow displays with a richer, more vibrant color palette than the conventional plasma, LCD or CRT displays.

They also claim the displays will:

be half the weight and cost of Plasma or LCD displays
require around 25% of the power required by Plasma or LCD displays
be very thin like Plasma and LCD displays are today
have a very wide colour gamut
have a 50,000 hour life
maintain full power output for the lifespan of the laser, resulting in a picture that doesn't progressively degrade over time, such as with plasma and LCD technology

Drawbacks

Together with the advantages of laser sources, there are reports that also describe some of the current shortcomings of laser displays,[18] such as the following:
Safety. The high power emitted by the coherent laser sources is inherently dangerous to human vision. Proponents claim that integrating the devices with the needed diffusion filters removes this risk.

Speckle. Due to the narrowband coherent light source, speckle will be an issue at the display. This has also been a problem in laser lighting displays and has been solved through modulation of the light source thus widening the bandwidth and reducing the possibility for coherent interference. Proponents claim that this issue can be minimized by the use of diffusing elements and multiple sources. These, however, may impact display resolution and system cost.