Display devices that require higher resolution are typically greater than 300 pixels-per-inch and call for a change at the transistor level to a higher mobility material. Click here to learn more about current smartphone resolution and where it's headed. In order to accommodate more pixels for higher resolution, traditional amorphous silicon (a-Si)-based transistors can be made smaller but have to compensate by using more power to maintain picture quality ultimately leaving less power dedicated to battery life. I can't think of anyone on the planet who wants to sacrifice battery life. Fortunately, we have a solution! Metal oxide (MoX) and low temperature polysilicon (LTPS) -based transistors can scale down the...
Have you ever watched Jennifer Aniston making a call on her mobile phone on the show, Friends? It is the size of a breadbasket! Clearly the mobile phone world has changed, but where do we go from here?
This year is an important and exciting year for the display industry. The leading display companies including BOE Technology Group, Co. are responding to strong consumer demand for next-generation televisions and mobile devices which require higher performance, longer battery life and thinner form factors. The leading display makers are also responding to inflection points in their product roadmaps as new materials and technologies such as metal oxide and large area low temperature poly-silicon (LTPS) are required in the manufacturing of faster and smaller thin film transistors.
Why is a smartphone like a hummingbird? Neither can go more than a few hours without refueling, or bad things happen. (If you answered that smartphone owners are often forced to flutter around looking for a power outlet, I’ll accept that, too.)
Do you know where the power goes? As the graphic shows, around half your battery is spent on the display alone. And of that, the vast majority is used simply to power the backlight that all LCDs need. (The situation for AMOLED displays is similar, but for different reasons. That’s a subject for a future blog.)
Clearly, improving the power efficiency of the display is a powerful way to improve...
[Updated February 13, 3013 because metal oxide backplane technology has improved since the original post was published. See question 7.]
There has been a huge amount of interest and discussion around new LCDbackplane technologies, particularly about metal oxide. Following on from my first post on the subject last week, I thought it might be useful to answers some of the questions I’ve been hearing most often.
The display industry is in the middle of one of the most significant technical transitions of the last 20 years and it is also mostly invisible to the average consumer. It has all to do with the advances taking place in transistors – the electronic switches that control the display’s picture, providing clarity and crisp imagery.
Every pixel on your LCD screen is turned on or off by a transistor. The complete array of pixel transistors is known as a backplane, as you can see in the graphic. Clearly, the performance of the backplane directly affects the quality of the display for your TV, smartphones and tablet PCs. How fast the switch can be turned on and off refers to the refresh rate and the total number of pixels on the screen equals picture resolution.