OLED will accelerate the replacement for LCD technology

OLED (Organic Light Emitting Diode) is based on the organic thin film spontaneous light display technology, with ultra-thin, ultra-wide viewing angle, flexible rollable, high color gamut, fast response and many other advantages, was considered a new generation of display technology. Since 1987 Professor Deng Qingyun discovery of this new material, which set off the development of the global boom continues. Professor Deng Qingyun said at the forum, is currently in a variety of applications, OLED has the LCD can not match advantage, the next two to three years, OLED display technology is bound to become the core, and gradually replace the conventional liquid crystal display technology.

Up to now, the global TV industry has gone through several display technology revolution, from the earliest CRT to plasma (PDP), liquid crystal (LCD), every upgrade is very difficult, but will be spawned huge business opportunities and lead the TV market reshuffle . Compared with the conventional display technology, OLED is even more rapid development.

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IEDM2015 opening, beyond the deep learning of “brain-chip” concern

 

International Society for Technology-related semiconductor device “2015 IEEE International Electron Devices Meeting” (IEDM 2015) held recently in Washington, DC (December 7, 2015 – the 9th).

The main topics are: 1) storage technology, 2) instead of new material such as silicon, transistors, and IC 3) three-dimensional structure, 4) power semiconductors, 5) silicon photonics, 6) flexible devices, 7) display and a photosensitive element technology, 8) class brain computing (Brain-like Computing)…

Key topics and focus paper organizers listed below. Focus storage technology is the use of 20nm process technology to achieve miniaturization or less DRAM, improved three-dimensional (3D) NAND flash technology reliability, improved ReRAM (variable resistive memory) packaging technology. Samsung Electronics will deliver a speech 20nm process DRAM.

New materials to replace silicon in 7nm technology and miniaturization technology in the future, will be released a few examples of the use of Ge and GaAs transistors Trial replace silicon and other semiconductor materials. Belgium IMEC will published content is on 300mm diameter wafers trial of InGaAs FET GAA (Gate-All-Around) structure and access to the high intrinsic.

3) three-dimensional structure of transistors and IC terms, using TSV (TSV) technology is the key, it will be released without using the TSV 3DIC technology. Tsinghua University in Taiwan will release 3DIC technology without TSV chip manufactured by logic, SRAM and ReRAM configuration.

4) power semiconductors, Fujitsu and Tokyo Institute of Technology research team will present at 96GHz to achieve high operating frequency of up to 3W / mm current output density of InGaN / GaN-HEMT .

5) silicon photonics technology, a major issue facing long-term – the light source technology has made progress. Although Ge bulk indirect migration, low luminous efficiency, but the compound has become a direct migratory GeSn. French research institute CEA LETI and other research team on a silicon CMOS-compatible use infrared technology to produce a GeSn microdisk lasers. According to the research team introduced, at a wavelength of 2.5μm obtained with up to 221kW / cm2 of output power.

6) a flexible device context, CEA LETI and STMicroelectronics will introduce the use of “UTTB (Ultimate Thinning and Transfer-Bonding)” technology, the RF circuit formed on an SOI substrate is transferred to a variety of flexible circuit board technology (Paper 15.7).

7) monitors and sensor technology, not only can be used to accept RGB pixel visible light, but also with a good sensitivity shooting near-infrared light image element of concern. In particular, a need exists in the medical use. Olympus will introduce two kinds of laminated element made of a CMOS sensor technology.

8) The focus of the class brain computing is to become a variety of techniques now concern depth neural network (DNN) next-generation technologies. DNN now exist can not go online and real-time learning and learning requires a lot of data and other topics. As a workaround, through the use of spike signals and the use of nonvolatile memory, so that “neurons (brain cells)” or connection “synapses” state neuronal plasticity switch has developed elements of concern. 2014 summer release spike signals using brain-chip “TrueNorth” of IBM, the use of non-volatile memory technology – phase change memory (PCM) trial a more realistic neurons and other chips.

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Why Apple iPhone To use EL panel

In general, the advantages of the liquid crystal panel substitution with an organic EL panel comprising: (1) without backlight and the optical film can realize a thin, lightweight, low power; (2) the use of a resin substrate, is not easily broken; (3 ) a high degree of freedom of shape, easily bent; (4) can be folded, and the like.

(1) thin, lightweight, low power consumption, and depending on the display image, the LCD panel power consumption is more dominant. However, if, as the Samsung Galaxy, as based on the use of black background screen display design, (although there are additional conditions, but) the power consumption of the organic EL panel will be substantially reduced. In the night sky of the Milky Way Galaxy inspired concept is impressive. However, it is hard to imagine that Apple will mimic Samsung’s concept. Of course, if in the future find a very high luminous efficiency of organic EL material, the organic EL panel in power consumption also will take advantage.

With regard to (2), as compared with the liquid crystal panel, an organic EL display easier to use a resin substrate. From smartphones whole, although the touch panel surface protective layer or glass, but obvious benefit is the display section of the substrate is not broken.

About (3), the LCD screen while bending, the thickness of the liquid crystal layer becomes different from the optical path within the optical film will change, leading to image degradation. One typical use curved screen smart phone is able to display the front and side of the Samsung “Galaxy S6 edge”. However, Samsung is still hard to imagine that Apple will mimic the concept.

About (4), Samsung may pioneered foldable smartphone. In this case, iPhone will be other people’s footsteps. Imagine Apple will do so.

This point of view, it is only “thin, lightweight”, “display board will not be broken,” “possible to achieve low power consumption,” several of the. Although very important, but if you want a new iPhone charm, still a little lacking impact, there is this feeling more than I should be a man now.

In addition, the organic EL LCD screen is also not as good as places such as screen resolution. Aspect LCD screen with a resolution of more than 500ppi products already in mass production, prototype has been done 800ppi. The organic EL panel has not been implemented on the RGB three-color light-emitting materials such fine patterning. The current practice is to try to make the image degradation obvious change pixels, or ignore the power consumption, using a combination of color filters and the white organic EL manner, so as to be close to the resolution of the liquid crystal. But to solve the problem fundamentally, but also innovative technology.

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Chino exhibited fuel cell temperature Visualization System

 

Japan Chino company (CHINO) without using a platinum catalyst for solid oxide fuel cell (SOFC) developer, launched a cell surface allows visualization of temperature distribution system, and in the “2015 System Control Fair / Exhibition 2015 Tokyo Measurement “(December 2 to 4 days, Tokyo Big Sight International Exhibition Center) on the display.

The temperature distribution of the surface of the fuel cell is important, because the uneven distribution of temperature will affect the life and reliability of the fuel cell. Occur simultaneously on the surface of the unit will reduce the temperature of the chemical reaction and can raise the temperature of the power generation. Caused by a chemical reaction of hydrogen produces water, the temperature will drop, and with the current power generation causes the temperature to rise. This easily leads to uneven distribution of surface temperature unit. At a temperature of different parts will produce stress, it is possible to shorten unit life, reduce reliability.

Chino has developed a fuel cell can be caught in the middle of a heat-resistant sapphire glass, and then placed in the furnace of the clamping device, can be distributed from the furnace temperature was observed for external thermal imager.

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Panasonic introduced the first organic EL TVs, LG’s curved panel

Panasonic has finally launched the organic EL TV. Model “CZ950″, is the only European market 65-inch curved organic EL TV. The non-autonomous panel TV production, but sourced from South Korea’s LG Display Corporation’s products.

Matsushita until 2014 “International CES”, has been developed to show a printed organic EL, its advanced nature and usefulness of the technology. However, in July the same year, with the integration of Panasonic and Sony organic EL research and development capabilities, and set up “JOLED” the new company, the new company took over by other personnel and technical resources, Panasonic developed a panel from the “IFA” began to disappear .

JOLED focused on the development of small and medium organic EL panel, currently suspended development work with a large TV panels. As a substitute, Matsushita in 2014, discloses the use of procurement from LG Display 65-inch curved organic EL display production test products. Although South Korea’s LG Electronics also own booth, showing the same panel with 65 inches of merchandise, but Panasonic outstanding picture quality, LG Electronics is attracting droves of technical staff to visit, giving the left a deep impression .

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