Sharp displays CPU-on-glass LCD

Sharp Corp. and its partner Semiconductor Energy Laboratory Co. Ltd. (SEL) unveiled Tuesday what the companies claim to be a world-first prototype of an LCD (liquid crystal display) with an 8-bit CPU (central processor unit) on its glass substrate.

Putting a CPU directly on the glass substrate of an LCD allows the display to function as a computer and makes possible the development of computers and televisions that can be thinner than 2 millimeters, they said.

Display makers, including Sharp, have been putting integrated circuits onto glass substrates for some time. Until now, that has meant putting driver ICs, which control the display, on the substrate. The advance announced by Sharp and SEL opens the possibility of putting an entire computer on a glass substrate, including a CPU, memory and other chips.

The prototype announced Tuesday was produced using Sharp's continuous grain silicon (CGS) technology. Sharp has been working on the development of LCDs that incorporate ICs and CGS since 1998.

CGS maintains atomic-level continuity at the crystal grain boundaries. This allows electrons to travel through the semiconductor 600 times faster than with conventional amorphous silicon, which is currently used to produce most LCDs, and approximately three times faster than low-temperature polysilicon, which is an emerging technology in the field.

The CPU used in the prototype screen produced by Sharp is a Zilog Inc. Z80 processor that contains 13,000 transistors and was manufactured using a 3-micron process. Zilog first produced the chip in 1976, Sharp said.

By 2005, Sharp hopes to develop a new breed of mobile display devices based on CGS, such as information terminals that are as thin as a credit card, said Mikio Katayama, general manager of Sharp's mobile-LCD group.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Kuriko Miyake

PC World

Comments

Comments are now closed.

Most Popular Reviews

Follow Us

Best Deals on GoodGearGuide

Shopping.com

Latest News Articles

Resources

GGG Evaluation Team

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell

LIFEBOOK UH574

The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi

STYLISTIC Q702

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott

STYLISTIC Q702

My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

Latest Jobs

Shopping.com

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?