Tag Archive: Organic light-emitting diode



Sony launches the world’s fastest semi pro camera A77

This is a discussion on “Sony launches the world’s fastest semi pro camera A77 within the Camera-Gear forums, part of the General Portables category;” Sony has launched the much awaited A77 and NEX-7.

With many world’s first A77 specs

24mp APS-C sensor,

2.4 million dot OLED viewfinder

12 fps with AF.

19 points (11 cross-type)

Magnesium Alloy/Plastic
Moisture/dust proof.

1080p 60p with phase detect AF.

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Then it launches another camera A65 SLT….

This is same as A77 but with plastic body with 10fps and 15 AF points.

Sony also launched the NEX-7 “Professional quality in your
(customer’s) hands” 

ü 24mp sensor

ü 10fps

ü 2.4m dot OLED EVF
magnesium alloy body

ü 1080p 60p

Hence Sony created wide range of lenses and most effective cameras which can be used in many applications such as athletics, games like tennis, cricket etc…


Posted by

RaviTeja(MGIT ECE 4th year)



In my last article we have gone through about the structure and properties of graphene. Now we are going to have a look at the futuristic screen which is transparent, flexible, and portable too. These new graphene screens are Indium free and developed through flexible electrodes Graphene screens are almost completely transparent, and are highly conductive and very strong.  



Researchers have created a flexible graphene sheet with silver electrodes printed on it (top) that can be used as a touch screen when connected to control software on a computer

Anyone with a smart phone or an iPad will tell you touch screens are the way of the future. But touch screens have some serious drawbacks, such as how expensive they are, not to mention easily breakable.

Graphene is a semi-metallic transistor. Simply put a transistor hold stateful information by switching from conductive to non-conductive. A one or a zero for example.


          Flexible, see-through video screens may be the “killer app” that finally puts graphene — the highly touted single-atom-thick form of carbon — into the commercial spotlight once and for all. And this research was reported in the online edition of ACS Nano.

          The lab’s hybrid graphene film is a strong candidate to replace indium tin oxide (ITO), a commercial product widely used as a transparent, conductive coating. It’s the essential element in virtually all flat-panel displays, including touch screens on smart phones and iPads, and is part of organic light-emitting diodes (OLEDs) and solar cells.

Main point to be noted here is these graphene screens are highly conductive and strong where as ITO screens are likely to be broken easily.

A hybrid material that combines a fine aluminum mesh with a single-atom-thick layer of graphene outperforms materials common to current touch screens and solar cells.


Using a roller, the graphene face can then be pressed against an adhesive polymer support and the copper etched away, leaving the graphene film attached to the polymer. The graphene can then be pressed against a final substrate – such as polyethylene terephthalate (PET) – again using rollers, and the polymer adhesive released by heating. Subsequent layers of graphene can then be added in a similar way.

The researchers used this technique to create a rectangular graphene film measuring 30 inches (76 cm) in the diagonal. The graphene was doped by treating with nitric acid and in this form the graphene sheet can act as a large, transparent electrode and was demonstrated to work in a touch screen device.

Typically, transparent electrodes used in such applications are made from indium tin oxides (ITO). The researchers say that the graphene electrode has better transparency and is tougher. ‘The price of indium has increased by a few times over the past decades and this will be more serious as markets for display and solar cells expand,’ says Ahn.’In addition, oxide materials like ITO are usually fragile and weak.’ Because of this, ITO-based touch screens have a finite life span, whereas, a graphene-based screen should last essentially forever.

Left: A transparent graphene film transferred on a 35-inch PET sheet. Right: A graphene-based touch screen panel connected to a computer.

Courtesy: science daily, new gadget, technology review, sciencemag, rsc.org

Posted by

Gopi Chand (MGIT ECE 4th year)

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Samsung’s transparent AMOLED technology

This Era is surely gonna make us amazed by the flexibility and the reliabilityto be involved in the design of Electronic Gadgets….As we know that Apple is trying to include a transparent Display for IPHONE 5 , many of the Multinational Brands has put its R & D into developing transparent Screen Technology….

Samsung is one brand which urges to release a transparent display product rather before than any other brand….

Plastic Electronics reports that Samsung Electronics will release products using its clear active matrix OLED displays within the next 12 months. Samsung displayed prototypes using the clear AMOLEDs during CES 2010 back in January. However this is the first indication that the models on display will actually head to retail any time soon.

As we saw during the show, the laptop sporting Samsung’s clear AMOLED allowed the user to see objects placed behind the screen while still offering sharp, bright images on the display. While the actual technology was quite impressive, the ability to see movement through the AMOLED screen looked to be somewhat distracting.

Plastic Electronics said that the first device to go commercial using the tech will be Samsung’s IceTouch MP3 player (YP-H1). This device is a portable all-in-one that plays music, DVDs, tunes in FM radio stations, and more. The estimated price will be around $328 USD when it finally hits the market.

The product showcased by the company is a laptop whose specifications haven’t exactly been paid much attention to. In fact, what the product is notable for is its futuristic OLED screen, whose more obvious trait is its transparency. The laptop’s display has a transparency that can go as high as 40%, compared with other ‘see-through’ screens whose maximum is of 25%.

It will be interesting to see if and how the screen will be capable of “switching off” the transparency, as end-users may not always want to see directly through it when playing media, reading documents or even playing games. Of course, the technology is still in the beginning stages, so high-end machines designed with similar screens are likely not set to emerge in the near future, especially considering the rather low resolution that the device currently seems to support.

“We have a lab in Korea that is currently working on developing a laptop with partially-transparent screen,” Sullivan said. “Soon, I imagine that all Samsung’s audio-visual products will feature this technology. We want to be the first in this market.

Posted by

Mahesh (MGIT ECE 3rd year)

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