ディスプレイ Archives - 31ページ目 (35ページ中)

Large Size OLED Panel Technology Match, ‘WRGB vs. Solution Process RGB’

2015年 5月 13日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

Large size OLED panel is currently being mass produced by LG Display using WRGB method, and investment in this method for large size panel is being considered by OLED panel latecomers. Another method that can be used to produce OLED is RGB method. In 2013 Samsung Display mass produced using RGB method but halted the process due to problems in yield rate and technology. However, recently as key display companies are developing RGB method using solution process for large area OLED panel, latecomers are having to make a difficult choice in process selection.

OLED specialized panel company JOLED, established by JDI, Sony, Panasonic, and Innovation Network Corporation of Japan (INCJ), is aiming for mid-to-large size OLED panel production using solution process. Additionally, other companies including AUO, BOE, LG Display, and Samsung Display are developing large size OLED panel using solution process technology. In 2013, AUO presented 65 inch FHD panel that used solution process technology, and BOE revealed 30.5 inch FHD panel. Panasonic also presented solution process applied 4K panel.

According to 2015 White OLED Display Annual Report, published by UBI Research, WRGB method has an advantage in high mass production potential as open mask is used. However, due to the stack structure and color filter use, it has a disadvantage of increased panel production cost. On the other hand, the materials and process technology for solution process are not yet mature, but has the advantage of being able to produce large size OLED panel in Gen 8 size or larger without glass cutting using RGB method. It also can reduce the production cost as the material efficiency is high and does not require color filter.

At present the mass produced glass area by the latecomers forecast to manufacture large area AMOLED panel is expected to occupy approximately 30% of the total large area OLED market in 2020, and latecomers’ choice in technology investment will be a key point. Therefore, the large area panel technology leadership will be decided on whether WRGB and solution process methods can solve the issues that each has.

By DaRae Kim, reporter@olednet.co.kr

JOLED’s Intense Start, Mass Production is When?

2015年 4月 15日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

At Finetech Japan 2015 (April 8-11, 2015), JOLED gave a presentation for the first time since its inception and drew much attention.

JOLED’s speaker Tadashi ISHIBASHI gave a presentation on JOLED’s target market and application technology under the title of “The Evolution of OLED Manufacturing Technology by JOLED”. During his speech Ishibashi revealed “JOLED’s target market is 10~30 inch mid-size OLED panel and ultimately to form new market through flexible display” and that “top emission, RGB printing, color filter, and ITZO backplane of self-align structure will be applied for key technology”.

Furthermore, by forming all RGB through solution process, macro-cavity effect via thin half-transparent cathode, and minimizing interference of other colors and external reflection using color filter, JOLED explained that high purity color reproduction is possible. It is analyzed that this means that they absorbed Sony’s characteristic super top emission technology. Backplane is top-gate’s TAOS (transparent amorphous oxide semiconductor) and Ishibashi added that it is also possible to reduce cost by minimizing investment amount by applying 5 mask self-align structure.

Regarding flexible display, JOLED used the technology that was applied to 9.9 inch qHD panel (revealed by Sony in 2012) which used white OLED and color filter as an example but reported they are currently developing technology to produce flexible display using solution process RGB.

From the presentation it is estimated that for JOLED’s mass production, Sony’s OLED panel structure and Panasonic’s RGB printing technology will be combined and applied. Although detailed investment timeline was not revealed, as mass production application technology and target have been publicly announced, investment in near future is anticipated.

[Finetech Japan 2015] Mobile Display up to 700 ppi. How about OLED?

2015年 4月 13日/0 コメント/カテゴリ: ディスプレイ, 展示 /作成者: OLEDNET

At Finetech Japan 2015 (April 6-8), vice president of LG Display, Yoon Sooyoung, forecast the display resolution would evolve to 700ppi UHD for differentiation in technology. Japan Display’s CBO Yoshiyuki Tsukizaki also disclosed that a person can perceive up to 700ppi and estimated that mobile display resolution would therefore develop up to 700ppi.

Currently mobile display is being mass produced at QHD (approx. 500ppi), and UHD resolution is known to being actively developed for LCD. It is analyzed that UHD mobile OLED panel development will be a necessity in order to adapt to the trend toward high resolution. OLED is being mass produced in RGB pixel structure where FMM (fine metal mask) is applied. However, as FMM production technology is difficult, QHD AMOLED panel is being mass produced via pentile pixel structure rather than real RBG pixel structure. Therefore, technology for realization of mobile UHD resolution is expected to be a key issue in future.

For the mobile UHD AMOLED panel realization, securing shadow mask technology that allows for UHD resolution is important. In Finetech Japan 2015, V-Technology exhibited FHM (fine hybrid mask) technology that can produce 700ppi or higher resolution. V-Technology further revealed that “resolution of up to 738ppi can be produced using laser patterning technology after the formation of polyimide film on top of Ni mask”.

Additionally, another method is where white OLED + color filter is applied which uses color filter patterning technology. This is a comparatively easier method for producing high resolution, and JDI is aiming for mass production using WRGB structure. Chinese latecomers are also examining application of white OLED + color filter structure for high resolution AMOLED panel production.

The attention of the industry is now focused on how OLED will react and what solution will be generated facing LCD sector that is evolving toward UHD mobile display.

738ppi UHD Resolution FHM, Finetech Japan 2015

By Yu Jin Hong, reporter@olednet.co.kr

Prof. Changhee Lee of Seoul National University, ‘Anticipate QLED’s Future’

2015年 4月 7日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

Professor Changhee Lee of Seoul National University discussed QLED’s future in the 1^st OLED KOREA Conference (April 2), organized by UBI Research.

QLED is a display that replaced emitting layer’s host and dopant to quantum dot (QD) whilst continuing to use existing OLED’s common layer, and can be formed via solution process. It can be mistaken as similar concept with recently released quantum dot products. However, these are devices that have quantum dot film attached to LCD and therefore fundamentally different from QLED which has basis on OLED.

Of the OLED panel cost, the expensive OLED key emitting layer materials, host and dopant, take up a high percentage. On the other hand, OLED’s emitting material quantum dot uses inorganic material which is cheaper compared to OLED material. This means that the QLED panel can be more reasonably priced, a point of great interest for the industry.

However, in order for QLED to be practical there are several issues that need to be solved. Balancing the electrons and holes, and prevention of pin holes that occur in each layer is a key technology needed to increase QLED’s efficiency that is quickly being developed. Also, although cadmium used in QLED is not likely to affect the environment, considering future environmental regulatory concerns quantum dot without cadmium is being researched. Lastly, solution process technology has to be established.

If QLED overcomes these issues and its lifetime and efficiency can match those of existing OLED, it is estimated QLED applied products will be manufactured. Professor Lee forecast that QLED would bring positive results of bringing down the cost of display while maintaining most of existing OLED process; QLED uses cheaper quantum dot material for emitting layer whilst continuing to use equipment and common layer of existing OLED technology. Additionally, he also concluded that there will not be any problem for material companies as they will be able to carry on selling materials for quantum dot. Professor Lee went on to ask OLED related companies with anti-QLED views to accept QLED in the same flow as OLED, and for positive considerations.

Prof. Changhee Lee, the 1st OLED KOREA Conference

What is the Next Killer OLED Display Application?

2015年 4月 6日/0 コメント/カテゴリ: その他, ディスプレイ /作成者: OLEDNET

The interest in automotive display by OLED industry’s key leaders, Samsung Display and LG Display, is growing. During the 1^st OLED KOREA Conference (April 2, 2015), Dr. Ki-Yong Lee, vice president of Samsung Display, predicted that “in 2018, 1.4 display units will be applied per car and form a market of 150 million units” and emphasized that “flexible OLED panel has an advantage of fast response time and being unbreakable and therefore suitable for automotive display”.

LG Display’s team leader, Won-Gyun Youn forecast that “from the rare keynote speeches from automobile manufacturers in this year’s CES, automotive display could be a new market for OLED”.

Speaking at the 1^st OLED KOREA Conference, Dr. Choong Hoon Yi, the president of UBI Research, also commented that “OLED’s merit of infinite contrast range will provide high visibility even in monochrome and appropriate for drivers, and flexible OLED can be freely applied to vehicle’s interior” and estimated OLED will be actively used for automotive display in future.

OLED display, as flexible display, can be easily produced and cannot be broken. It also has advantages of infinite contrast range and fast response time and is a focus of automobile industry. Several cars have already been released with OLED display equipped instruments including dashboard and navigation. Recently, Italdesign Giugiaro’s concept car, Gea, equipped with LG Display’s plastic OLED was revealed in Geneva International Motor Show 2015.

Following this trend, the company that is most proactive in OLED application in automobile industry is LG Display. LG Display has already announced their target of 30% world market share acquisition in automotive display with the revenue of approx. US$ 1,800 million in 2018. In CES 2015 held in January, LG Display also presented 13.1 inch automotive display and 21.5 inch curved plastic OLED that included instrument panel and CID.

Various Display Equipped Concept Car, Geneva International Motor Show 2015

By Da Rae Kim, reporter@olednet.co.kr

[FPD China 2015] Tianma, Reveals China’s First FHD OLED Panel’

2015年 3月 19日/0 コメント/カテゴリ: ディスプレイ, 展示 /作成者: OLEDNET

A display company Tianma succeeded in developing China’s first OLED panel with FHD resolution. There are several companies that mass produces or is developing AMOLED panel for smart phones. Samsung Display and LG Display are in Korea, JDI in Japan, and AUO in Taiwan. In China, the companies include Tianma, Visionox, Truly, and EveryDisplay, as well as BOE. The 4 companies that are mass producing the AMOLED panel are Samsung Display, LG Display, AUO, and EverDisplay. Of these, only Samsung and LG are pass producing FHD AMOLED panel.

With LCD panel for mobile, products with resolution of FHD or higher are already being mass produced. However, due to the manufacturing process, it is difficult to produce OLED panel with FHD resolution or higher. As emitting materials are evaporated via fine metal mask (FMM), obtaining high resolution of high precision FMM is a priority. In order to manufacture high precision FMM, metal plate of 40um or less is needed, and also requires technology that allows for highly accurate process. Only 2 companies, Japan’s DNP and Toppan, can produce high precision FMM, and since they have exclusive contracts with Samsung and LG respectively, they cannot provide FMM. Therefore, JDI employs WOLED structure that does not require FMM for AMOLED development and commercialization.

To develop high resolution AMOLED panel, Tianma has been independently developing dual FMM. Although it has not been confirmed what type of FMM was used for the FHD AMOLED revealed in FPD China 2015, they exhibited 5.5inch FHD OLED product with 400ppi resolution.

Resolution of FHD or higher can be realized by manufacturing OLED panel itself purely by process, or by another method with pentile technology. Currently it is difficult to produce FHD with the first method and even Samsung and LG are utilizing the pentile technology. As such, it is likely that Tianma’s AMOLED is pentile driven. Pixel structure needs to be analyzed once the product is available on the market.

FHD AMOLED panel from Tianma, FPD China 2015

[Geneva International Motor Show 2015] Vehicle Display for Driver’s Comfort

2015年 3月 9日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

By Choong Hoon Yi

One of top 5 motor shows in the world, Geneva International Motor Show 2015 has opened, with approx. 220 companies from around the world exhibiting around 900 cars.

The basic function of a vehicle is to transport people or cargo. However, recent commercialized vehicles have car information system on top of basic driving function. This allows the driver to understand various information while driving.

Vehicles exhibited in Geneva International Motor Show can largely be divided into sports car, sedan, and SUV, and separated into gasoline, diesel, and HEV according to its source of energy. The key focus of this motor show is environmentally friendly car conforming to the EU’s carbon emission quantity. The majority of cars that can accommodate the EU’s standard of 130g/km are HEV and diesel. Volkswagen, Lexus, and Benz exhibited cars that comply with EU standard in large quantities.

The key point of the 21^st century vehicles are various methods of information processing integrated with IT technology as well as the environment issue. This is obviously a device where a display, an information medium, is important. What kind of displays are being used by the latest cars exhibited in the Geneva International Motor Show? The vehicular display can be divided by its uses: dashboard, information, and entertainment. Dashboard display performs the existing function of showing the speed and vehicular conditions. Information display is granted with audio function including navigation. Entertainment display is for the backseat passenger who will be able to play games or watch TV while the car is moving.

In the IoT era, the information display holds the most important place of the 3. When the driver is processing various information, including navigation, via information display, the driver’s attention has to move away from the road to the center of the car. Even if this occurs for the shortest amount of time, there is a danger of an accident. Better the vehicle, it minimizes the damage to people in accidents by limiting the shock through the main body and air bags. What would be even better is a system that prevents the accident in the first place. Electronic control such as ABS system and breaks are such systems. Although various safety devices are within the vehicle, if the driver’s attention moves away from the road ahead, the likelihood of an accident inevitably rises. The use of information display such as navigation system can be a factor that increases the possibility of an accident.

The location of the vehicular information display sold by companies all over the world is essentially below central ventilation system; the eyes have to move downward while driving. Companies that are more mindful of the drivers place the information display on the same level as the vents. Of course, the best system is the one where the display is located above the ventilation so that the driver’s eyes can be closest to the front.

Where do world’s famous brands such as Benz, BMW, and Audi have their information display?

These 3 companies have mostly placed the display above the vents, minimizing the distance that the driver’s eyes have to move from the road. The more famous the brand, the better care for the driver’s safety can be observed. Perhaps a reason to buy one of these cars despite its high cost.

LG’s Plastic OLED, What’s Next?

2015年 3月 4日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

LG Electronics showcased smart car related technology collaboration by supplying components for Gea. Gea, revealed by Italdesign Giugiaro on Mar 3 (Korean Time), in Geneva International Motor Show 2015 (Geneva Palexpo, Geneva, Switzerland) is an autonomous luxury concept car.

LG Elec. and Italdesign’s concept car technology collaboration items are in-car display, tail lamp/camera, and IoT (linked with smart car).

For in-car display, 6 inch HD curved plastic OLED (P-OLED) was used in the front and rear console, and 12.3 inch full HD display was supplied for dashboard and CID (Center Information Display), and the passenger side. 19 inch LCD has been converted into to provide large screen for RSE (Rear Seat Entertainment). As thin and flexible design is possible with plastic OLED, it is suitable for the interior of a vehicle with its various formation. It is also appropriate for automotive display as advantages such as the high contrast ratio and fast response time reduce driver’s eye strain. Therefore, in-car display is estimated to be new application for OLED display in future.

Concept Car, Gea, a technology collaboration product between Italdesign of Volkswagen Group and LG Elec., The Geneva International Motor Show 2015 Source: LG Elec.

LG Display, panel supplier of LG Elec., have made an announcement of their target to secure 30% of world’s market share in automotive display in 2018, and revenue of approx. US$ 2 billion. In CES 2015, held earlier in the year, they presented 13.1 inch automotive display and new 21.5 inch curved products for dashboard and CID. LG Display is planning to target automotive navigation/dashboard/entertainment display.

LCD, Busy Playing Catching Up to OLED…

2015年 2月 25日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

Following smart phone, other devices equipped with display such as tablet PC, monitor, and TV are mostly using OLED panel. In turn, LCD is attempting to replicate key points of OLED panel to catch up.
The first is LTPS TFT technology. When Samsung Display started producing AMOLED using LTPS TFT, it was overlooked by the LCD sector as it financially needed twice the amount of investment compared to a-Si TFT technology and therefore thought it to have no business value. However, as the smart phone resolution is getting higher, LCD companies are also employing LTPS TFT that has high mobility.
The second is the ultra slim thickness of OLED panel that does not have BLU. To answer the smart phone’s need for a thin body with light weight, LCD is thinning the panel by slimming the glass substrate further and further. Nowadays, even TV sector of LCD is busy trying to become thinner. In CES2015, Sony exhibited ultra slim LCD TV with thickness of approximately 4.9mm.

<CES2015, Sony Floating Style 65” UHD LCD TV>

The third is curved design. LG Elec. and Samsung Elec. exhibited curved OLED TV using thinness of OLED panel in CES2013. With the products on the market, LCD TV also reduced thickness and began selling curved LCD TV.

<CES2015, Hisense Curved LCD TV>

Hisense, a Chinese brand, exhibited LCD TV with curved design in CES2015. Samsung Elec. decided that the main product of 2015, SUHD LCD TV, will have curved design, as well as releasing a curved LCD monitor. However, despite reducing the thickness LCD cannot yet be applied to smart phones.

The fourth is color reproductivity rate. The existing LCD TV can only produce approximately 80% of NTSC standard, which is limited compared to 110% of OLED. LCD sector criticized OLED’s color reproduction to be excessive; however, they recently developed new technology of applying quantum dot materials onto BLU and launched the sales of LCD TV with almost 120% of NTSC. Furthermore, it is deceiving the public by calling the QD BLU LCD TV as Quantum Dot TV packaged as a non-LCD TV.

<CES2015, TCL QD BLU LCD TV>

The fifth is contrast ratio. OLED TV’s contrast ratio is close to infinite with 1,000,000:1. Compared to this, LCD TV’s contrast ratio was 1,000:1, and unable to showcase dark scenes. Recently, HDR (high dynamic range) technology that brightens bright scenes and darkens dark scenes is strengthening its contrast ratio. Sony is striving to achieve high contrast ratio for LCD TV, similar to OLED TV, and exhibited HDR technology applied BRAVIA in CES2015.

<CES2015, Sony HDR applied LCD TV>

Many key points of OLED such as previously mentioned thickness, contrast ratio, and curvature ratio still need to be improved by LCD panel, and diverse attempts are continually being made to catch up to OLED panel that is entering the market with great strength. However, LCD cannot yet even attempt to match OLED on high speed response time that is needed for programs with fast action such as sports.

OLED holds diversity in color definition and design, and even if LCD keeps on reaching for these characteristics, LCD will remain LCD and will not be able to overtake OLED.

Samsung Display, 2015 to be the year of flexible OLED!

2015年 2月 10日/0 コメント/カテゴリ: ディスプレイ /作成者: OLEDNET

The A3 line of Samsung Display is moving silently. Reigning as the best in the mobile AMOLED industry, Samsung Display has been preparing the flexible AMOLED as its next prey for a long time.

Samsung Display provided the flexible AMOLED for Galaxy Note Edge following Gear Fit and Galaxy Round, and the next model to be released from the second quarter of this year is the dual-edge curved panel.

The target is Galaxy S6.

To continue the success of Galaxy Note Edge, Samsung Electronics is to take the flexible AMOLED in full scale on its flagship Galaxy S series. This model is expected to be unveiled at MWC2015 and it will hit the shelves from April in two models as equipped with the existing rigid AMOLED and flexible AMOLED.

Considering the capacities and yielding rates of Samsung Display’s A2 and A3, it is estimated that about 3~4 million of the 5-inch flexible AMOLED will be produced.

<Expected design of Galaxy S6 dual-edge>