tft lcd fingerprint on display brands

The rat race to annihilate ‘the bezel’, or as much of it as possible, is still on, and consequently, a plethora of phones with under-display or in-display fingerprint sensors are now available across all budgets. The optical in-display fingerprint readers have now evolved to their fourth and fifth generation and are finally almost as reliable and snappy as the capacitive fingerprint sensors.

Most manufacturers are perfecting optical fingerprint sensors, save for Samsung which is also invested in Ultrasonic in-display fingerprint sensors for its flagships.

To start with, the front-mounted in-display or under-display fingerprint sensor feels more natural (debatable). That’s where prominent brands like Samsung, OnePlus, and Apple used to place them before the full-view screens required these sensors to be shifted to the back. A front-mounted sensor is also more convenient to use when your phone is resting on your table.

Apart from returning the fingerprint reader to the front, the under-display sensors will also allow for a broader scanning area. For instance, sometime in the future, you could simply place your thumb anywhere on the screen while pulling your phone out of your pocket to unlock your phone seamlessly.

And lastly, the new in-display fingerprint sensors can work with mildly wet and greasy hands. That’s something you don’t get with capacitive fingerprint sensors.

One obvious disadvantage of under-display fingerprint sensors is that both the optical-type and ultrasonic sensors are inherently slower and have a higher error rate than the capacitive ones. They don’t always work well with third-party screen protectors and tend to get slower over time (you have to reconfigure your fingerprints to fix speed and accuracy).

Capacitive sensors are relatively easier to locate and access without looking at the screen. Another downside is that they could add to the repairing cost as smartphone screens are quite vulnerable to damage.

They are faster in registering fingerprints if not in unlocking. you can just tap and lift your finger while the phone does the unlocking in the next split second.

Galaxy S22 Series comes with a powerful Snapdragon 8 Gen 1 chipset and a large amount of RAM. The Galaxy S22 and S22+ have 8GB RAM, whereas the S22 Ultra model has 12GB RAM. The smartphones come with a Dynamic AMOLED display, and a 120Hz refresh rate but in different sizes. Battery capacity varies from 3700mAh to 5000mAh. They are available in a variety of colors.

Under the hood, it has Snapdragon 8 Gen1 octa-core chipset with LPDDR5 RAM and UFS 3.1 storage. Among other things, you also get flagship-worthy cameras and a 5000mAh battery with 80W fast charging support.

The Vivo T1 44W is available with 4GB of RAM and 128GB of internal storage. The phone offers a 6.44-inch AMOLED display and comes with a resolution of 2400×1080 pixels. It runs on the Android 12 OS and sports a triple camera setup at the back. The phone has an under-display fingerprint sensor. It comes in Starry Sky, and Midnight Galaxy colors in India and starts at a price of Rs. 14,499.

Xiaomi 12 Pro presents a 6.73-inch FHD+ AMOLED screen with a 120Hz refresh rate, 480Hz touch sampling rate, and an in-screen optical fingerprint scanner. The display also supports up to 1500 nits brightness, HDR10+ certification, Dolby Vision, and Corning Gorilla Glass Victus protection

Xiaomi 12 Pro is powered by Snapdragon 8 Gen 1 octa-core chipset assisted by LPDDR5 RAM and UFS 3.1 storage. The underlying battery is 4600mAh in size and comes bolstered by a 120W charger.

The OnePlus Nord 2T offers a best-in-class balance of value, performance, and premium features, giving you the ultimate smartphone for a price below Rs. 30,000. It is powered by MediaTek Dimensity 1300 chipset and is 5G ready with up to 12GB RAM and up to 256GB storage. It features a 6.43-inch AMOLED display with a 32MP selfie camera and a triple camera setup at the back. It runs Oxygen OS 12.1 and packs a 4500mAh battery with 80W SuperVOOC fast charging support.

The smartphone has an in-display fingerprint sensor that is fast and effective. The OnePlus Nord 2T comes in grey shadow and jade fog colors and it’s price starts at Rs. 28,999.

Vivo X70 Pro Plus ships with a dual-curved edge AMOLED display with a 120Hz refresh rate and an under-screen fingerprint reader. The central punch-hole cutout houses a 32MP camera.

Under the hood, the processing is done by a Qualcomm Snapdragon 888+ chipset aided by LPDDR5 RAM and UFS 3.1 storage. The battery inside stores 4500mAh of juice and can be topped up with a 55W charger.

At the core, there is Snapdragon 8 Gen 1 chipset paired with 12GB LPDDR5 RAM and 512GB UFS 3.1 internal storage. The innards also include a 5000mAh battery with a 65W SuperDart charge. Other highlights include a 50MP sensor-led triple-rear camera, 32MP selfie camera, and 5G connectivity support.

The Chinese smartphone maker, iQOO has unveiled the first smartphone to support 200W fast wired charging in China. iQOO 10 and iQOO 10 Pro have been launched that come with 200W fast charging. iQOO 10 Pro has a 6.78-inch AMOLED display, 120Hz refresh rate, and a dedicated V1+ chip for smoother gaming sessions. The iQOO 10 Pro runs Snapdragon 8+ gen 1 chipset with up to 12GB RAM and up to 512GB storage.

The back has a 50MP main lens along with a 150-degree wide-angle lens and a 15MP telephoto lens. It packs a 4700mAh battery with 200W fast charging and features an in-display fingerprint sensor for seamless usage. Its price starts at Rs. 59,000 in China and it is expected to arrive in India soon.

Priced at Rs. 45,999, the Oppo Reno 8 Pro falls in the premium mid-range segment. It is powered by the MediaTek Dimensity 8100 Max chipset with 12GB RAM and 256GB storage. It comes with MariSillicone X NPU and features an AMOLED display with a 50MP camera and a 32MP selfie lens.

The Oppo Reno 8 Pro packs a 4500mAh battery with 80W fast charging capability and runs Android 12 Color OS 12.1. It has an under-display fingerprint sensor and comes in glazed green and glazed black colors.

Google recently launched Pixel 6a for the Indian market. It is powered by the Google Tensor chipset and features up to 6GB RAM and 128GB storage. It has a 6.14-inch Full HD+ display and packs a 4410mAh battery. The smartphone weighs 178 grams and features a swift in-display fingerprint sensor. It has a dual camera setup at the front and runs Android 12 OS.

Nothing Phone 1 is the first ever smartphone by Carl Pei’s Nothing company. It brings unique features like a glyph interface design on a transparent back. The phone comes with starting price of Rs. 32,999 and has a clean UI experience. The device has ample RAM and storage options and comes in black and white colors. It is powered by a Snapdragon TM 778G+ chipset with Adreno 642L GPU.

It has a dual camera setup at the back with a 50MP main and a 50MP ultrawide sensor. It features a 6.55-inch OLED display with a 60Hz-120Hz refresh rate and a pixel resolution of 2400×1080. It features an under-display fingerprint sensor for faster response from the device.

The Vivo V25 Pro 5G comes with a color-changing flourite AG Glass Design in the Surfing Blue model that interacts with sunlight and other sources of Artificial UV rays to change from blue to green color. The smartphone has an in-display fingerprint sensor and is powered by MediaTek Dimensity 900 chipset with up to 8GB RAM and up to 128GB storage.

The smartphone has a 6.4-inch AMOLED display and runs Android 12 based on FunTouch OS 12. It has a triple camera setup at the back including a 64MP main, an 8MP ultrawide, and a 2MP macro sensor. There is a 50MP selfie lens at the front and the Vivo V25 Pro packs a 4500mAh battery with 44W fast charging as well. Its price starts at Rs. 31,999 and it is up for grabs via Flipkart and Vivo’s official website. It comes in Elegant Black and Surfing Blue colorways.

OnePlus launched the 10T as an addition to its Number 10 Series. The smartphone is packed with features like an under-display fingerprint scanner at the front for an easy and intuitive authentication process. The smartphone is powered by Snapdragon 8+ Gen 1 chipset along with up to 8GB RAM. It has a 6.7-inch AMOLED display as well.

The device has a 50MP main, 8MP ultrawide, and a 2MP macro lens for good photography. It packs a 4800mAh battery under the hood with 150W SuperVOOC charging. It comes in Moonstone Black and Jade Green colorways and is available on Amazon starting at Rs. 49,999.

Samsung launched Galaxy A73 5G which is a mid-range smartphone that went on sale in April 2022. It is powered by Snapdragon 778G chipset with up to 8GB RAM and up to 256GB storage. It has an under-display fingerprint sensor and sports a 6.7-inch FHD+ display with a 120Hz refresh rate.

The smartphone runs Android 12 and features a quad-camera setup at the back. The setup includes a 108MP main, a 12MP ultrawide, a 5MP depth, and a 5MP macro lens. The front has a 32MP selfie lens. It packs a 5000mAh battery with 25W fast charging and is water resistant as well. The price starts at Rs. 41,999 and it is up for grabs online and offline. It comes in Awesome Grey, Awesome Mint, and Awesome white colors.

The latest Realme 10 Pro Plus 5G comes with a 6.7-inch AMOLED display and an in-display fingerprint sensor. It is powered by MediaTek Dimensity 1080 chipset and packs a 5000mAh battery with 67W fast charging. There is a 108MP main, 8MP ultrawide, and 2MP additional lens at the back and it is priced at Rs. 24,999 in India.

The Motorola Moto G72 sports a 6.55-inch P-OLED display with an in-display fingerprint sensor. It packs a 5000mAh battery with 33W fast charging and has a 16MP selfie camera. The smartphone is powered by a MediaTek Helio G99 chipset with 6GB RAM. It has a 108MP main, 8MP ultrawide, and 2MP additional lens at the back and is priced at Rs. 19,990.

These are some of the best phones available with an in-display fingerprint sensor. As you might have noticed, we have included the best option from different brands, and going forward, we will update the list with new phones as they arrive.

Hikvision’s DS-K1T201MF 1 Series optical IP-based fingerprint access control terminals feature multiple advanced technologies, including fingerprint recognition, face detection, Wi-Fi, smart card recognition, LCD display screen, and picture capturing technology.

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New sensor technologies are being developed specifically for the integration of fingerprint scanning functionalities with OLED displays. The recent announcements indicate that the industry is moving away from capacitive sensors to focus their efforts on optical or ultrasonic detection. For display manufacturers, this could even present opportunities to innovate and offer their own solutions.

Once a premium feature, fingerprint sensors have become almost standard on smartphones. However, the latest design trend is to remove the bezels around the display, leaving no room for the fingerprint sensor. Some OEMs made the choice to move the sensor to the back of the device, which is not always convenient (for instance when mounted on a car dash).

The more ambitious option is to integrate the fingerprint sensor with the display. For the iPhone X, Apple considered this option but decided in the end to rely only on their new FaceID technology which uses an infrared camera for face recognition. The exact reasons are unclear, but it is safe to say that introducing a fingerprint sensor would have pushed the manufacturing cost of the phone even higher. It is also possible that the technology was simply not up to the standard of Apple at the time.

The industry is progressing fast however. At CES this year, Vivo introduced the first smartphone with an under-display fingerprint scanner. The sensor inside is the new Clear ID FS9500 by Synaptics. What makes it so different? It is an optical sensor.

Although Synaptics had built a strong expertise in capacitive sensors, they had to switch to an optical system for the FS9500. You can think of it like the image sensor inside a camera but without a lens. Conventional capacitive fingerprint sensors are difficult to integrate with a display because the distance between the sensor and the finger must be very short (300 microns). With optical sensing, it is possible for the sensor to be further away from the surface and still produce a high resolution scan.

There is however another challenge: an optical sensor is not transparent so it has to sit behind the display. This solution does not work well with LCD panels which are transmissive displays with a backlight. Fortunately, many new smartphones now use OLED displays instead of LCD, making it much easier to integrate an optical fingerprint sensor. With OLED, the display is used as the illumination light and the sensor captures the reflected light that travels back through the display. According to the presentations from Synaptics the distance between the finger and the optical sensor can be as high as 1.5 mm. This is well within the thickness range of an OLED panel with a standard cover glass.

Image sensors like the one used by Synaptics are usually made with CMOS technology. CMOS sensors can achieve resolutions over 2,000 dpi and can be mass produced in existing semiconductor foundries. Synaptics is not the only one taking advantage of this mature industry. For example, Vkansee is another company that has developed a CMOS optical sensor for fingerprint scanning. However, large CMOS sensors are expensive and the cost increase exponentially when scaling up to even larger sensing areas. In other words, it is not an economically viable option to turn the whole display into a fingerprint scanner. You are more likely to get a scanning area the same size of a small button.

For the display industry, there is an opportunity to offer an alternative to CMOS sensors. Some companies are now trying to leverage their expertise in manufacturing thin-film transistors (TFT) to make their own fingerprint sensors. For example, Japan Display Inc. (JDI) are now developing a sensor on glass that is based on the same polysilicon TFTs used in their LCD panels. The sensor is capacitive so is not designed to be placed behind a display. Since TFTs are used to make the active matrix in LCD or OLED displays they are ideal for making large sensor arrays.

The most interesting new development was shown by BOE at the Display Week exhibition this year. The Chinese manufacturer demonstrated the first under-display fingerprint sensor made in-house with TFTs. The optical sensor had a resolution of 500 dpi and was placed directly under an OLED display. They said they could make the sensor on conventional glass substrates or on plastic to match the sensor with flexible OLED displays.

BOE was also showing another prototype featuring an 800 dpi CMOS fingerprint scanner manufactured by Vkansee. This clearly demonstrated the strengths of each approach: higher imaging resolution with CMOS, larger sensing area with TFT. Although the sensor in the TFT demo was smaller than the display, it will be possible in the future to make larger ones to cover the whole. BOE also said they use new materials which will make it cheaper to scale up.

Making fingerprint sensors with TFT is not completely new. Already back in 2016, FlexEnable and Isorg demonstrated a flexible fingerprint and vein sensors with an 86 × 86 mm active area. The device combined FlexEnable’s organic TFT backplane with Isorg’s organic photodetector. Since then, they have been able to achieve a resolution of 500 dpi, which is the level usually required for secure biometric applications. It would be fascinating to see this sensor integrated with an OLED display, as it would result in a Trinity of organic electronics (OLED, OTFT, OPD) combined into a single device.

The Holst Centre has also been developing organic photodetector arrays, but they used metal-oxide TFT for the backplane. The prototype they demonstrated at Display Week is relatively large (60 × 80 mm) but can only produce images at 200 dpi [UPDATE: they also made a smaller sensor with a 500 dpi resolution]. The Holst Centre says the technology will be transferred to industry for commercialisation.

Is optical detection going to be the dominant technology for fingerprint sensors? It seems that most of the industry is betting on it. However, one big player wants to offer an alternative. Qualcomm has been developing an ultrasonic sensor for several years and the company says it can also be placed behind a display. There are limitations though. Unlike optical sensors, ultrasonic sensors do not see through air gaps, so they will be better suited for flexible OLED displays that are bonded to the front glass of the device.

The rapid adoption of OLED displays in smartphones has enabled new possibilities. First it was the transition to flexible displays and now the integration of fingerprint sensors. It is going to be a very exciting time for the sensor and display community and I believe we are going to see a lot of innovations in the coming years.

Dr Guillaume Chansinis the founder and principal consultant atIrimitech Consulting. He has been following emerging materials and devices since 2012 and has spoken at major industry events on printed/flexible electronics, wearables, displays, and sensors.

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For years, rumors have circulated about companies like Samsung and Apple attempting to integrate fingerprint sensors into their smartphones’ displays — and now someone’s actually gone and done it. Vivo, a major Chinese smartphone brand owned by the same company behind Oppo and OnePlus, has announced the X20 Plus UD, the first ever smartphone to ship with the technology.

The phone is the result of collaboration between Vivo and Synaptics, the US-based sensor maker. We tried out the in-display fingerprint sensor on a pre-production phone at CES 2018 earlier this month, and it ended up winning our Best in Show award. You can see it in action in the video below.

The demand for in-display fingerprint sensors has grown as phone design evolves in the direction of slimmer bezels and screens taking up almost all of the front of the device. Some companies, like Samsung and Google, have gotten around this by placing the fingerprint sensor on the rear of the phone, which can be less convenient; Apple, meanwhile, engineered its Face ID system on the iPhone X so that it could abandon fingerprint authentication altogether.

Vivo’s X20 Plus UD is a pretty straightforward device beyond its fingerprint scanner — in fact, the regular X20 Plus came out last year and had the sensor on the back. It has a 6.43-inch 2160 x 1080 18:9 OLED display with slim bezels on the top and bottom, dual 12-megapixel cameras, a Qualcomm Snapdragon 660 processor, and a 3,905mAh battery.

Fingerprint sensors will still be the first choice for most Andriod phones in 2018, since other biometric authentication methods available for Andriod phone makers cannot completely replace fingerprint identification yet, says TrendForce. Meanwhile, in-display fingerprint sensors are expected to make breakthrough this year, and vendors like Samsung, LG, OPPO, Vivo, Xiaomi, Huawei are likely to embed this technology, bringing the global fingerprint sensor penetration rate in smartphones to 60%.

Apple acquired Authentic in 2013 and have embedded fingerprint scanning in iPhones and iPads since then. In the past years, Android camp has also adopted fingerprint scanning to unlock phone and make mobile payment. However, as full-screen becomes the trend and Apple replaces Touch ID with Face ID in 2017, Android camp has to adjust their strategies, says TrendForce.

The mainstream fingerprint recognition solutions are based on capacitive sensing technology. On other hand, designs of smartphone displays are shifting towards higher screen-to-body ratio and full frontal screen. Phone makers recognize that there is insufficient space for the front side of the smartphone for a standard capacitive fingerprint sensor, and thus put their focus of development on in-display fingerprint sensor in recent years. At the end of 2016, Synaptics released UnderGlass, an optical solution of fingerprint sensing, which overcomes the limitation that capacitive solutions cannot sense through the glass panel of phones. Recently, Synaptics also released new in-display fingerprint sensing solutions for AMOLED panels. After more than a year of development, Synaptics’ optical solutions of in-display fingerprint sensing have chance to enter mass production due to the increasing yield rate of Synaptics and other related companies.

Capacitive fingerprint sensing chips and TDDI chips used to be the key product lines of Synaptics from 2016 to 2017. But as the competition becomes intense, Synaptics has started to actively develop in-display fingerprint sensing technology. Its competitor Goodix, for instance, has recently sent sample products to major mobile phone vendors for testing; Qualcomm has cooperated with Vivo in developing ultrasonic fingerprint sensing in 2017; FPC, the Swedish biometric authentication solutions provider, also released its ultrasonic fingerprint sensing technology at the end of 2017. The active engagements of these companies indicate that in-display fingerprint sensing will bring about a new trend for smart phones.

In addition to Korean brands Samsung and LGE which make AMOLED panels by their own, Chinese smartphone brands such as OPPO, Vivo, Meizu, Gionee, Xiaomi and Huawei will also have chance to embed in-display fingerprint sensor for AMOLED panel in their new models to release in 2018. However, Samsung still dominates global production capacity of AMOLED panels, which will limit the scale of Android camp’s adoption of in-display fingerprint sensing in their flagship models. As the result, a large number of middle and low end smartphones will continues to use traditional capacitive fingerprint sensing that has costs less. TrendForce estimates that global smartphone shipments for this year will total around 1.53 billion units, in which the penetration rate of fingerprint recognition technologies will reach 60%, an increase of five percentage points up from 55% of 2017.

According to the latest report byTrendForce, big brands such as Vivo, Xiaomi, Huawei, OPPO and Samsung have extended FOD (Fingerprint on Display) technology down from flagship devices to mid-high tier smartphones, enlarging market scale and causing the costs of FOD tech to slide. Penetration rates for optical and ultrasonic FOD solutions are therefore predicted to surpass that of traditional capacitive solutions and become the mainstream technology for smartphone fingerprint recognition in 2022.

TrendForce Analyst Kurt Chen points out that the Android camp has become the sole backbone of fingerprint recognition in the smartphone market ever since iPhone took to Face ID technology instead. Furthermore, although smartphone brands did not “ditch fingerprint recognition and adopt Face ID” wholesale as others had previously feared, some brands did limit themselves to the algorithmic “Face Unlock” and abandoned costly fingerprint sensing modules on budget-sensitive starter devices. In practice, mobile payments still rely on traditional PINs and patterns to ensure information safety, yet these type of smartphone products cause market share erosion for capacitive finger scanner phones.

Although the release of Face ID caused others to worry for the future development of various fingerprint recognition-related industries, the optical FOD solution released by Synaptics and Goodix in 2018 could both accommodate a full screen design and confer a competitive cost advantage. Many smartphone brands are scrambling to introduce this technology as a result. Added to the fact that Samsung deployed flagship devices implemented with Qualcomm"s ultrasonic FOD solutions in early 2019, the number of smartphones implemented with FOD technology in 2019 may hit 200 million devices, with optical and ultrasonic solutions to take up FOD market shares of 82% and 18%, respectively. Looking at the overall smartphone fingerprint market development, if Apple has no plans of reintroducing fingerprint technology,then the fingerprint technology penetration rate will have to wait until 2021 for a chance to rise above 70%.

At the same time, relevant businesses are currently making an effort to develop FOD technologies suitable for LCD screen smartphones and possessing large-area sensing capabilities. Since this technology requires sensors to be built on TFT substrates, differing from current sensors, which are built on Silicon substrates, TrendForce believes that this type of technology will affect current major suppliers such as Goodix, Egis and FPC to a certain degree. In contrast, display driver IC businesses already possessing panel-related technologies and deep-seated in the supply chain will have a chance to enter the fingerprint recognition market.

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As the security control of money flows becomes increasingly strict, identity authentication relying on a single fingerprint reader is no longer sufficient. This time, AUO will present the unique ultra-thin LTPS TFT optical fingerprint sensing module, with a sensing area of up to 2.9-inch, integrated under OLED panel and a 6.4-inch LCD panel incorporating finger recognition, touch and display functions. Besides the application of in-cell touch technology and a three-in-one integrated IC, the 6.4-inch LCD panel breaks through the limits when integrating CMOS image sensor structure to existing panels to offer a large customized sensing area of up to 50mm x 50mm. Both technologies support multi-finger authentication and are exceptionally ideal for financial transactions, as they can substantially improve the security of biometric recognition. In the meantime, AUO will also demonstrate a TFT optical fingerprint sensor with the world’s highest pixel density(*) up to 1000PPI, which can not only clearly recognize the fingerprints of delicate newborn baby fingers, but also detect the heartbeat through the slightest grayscale change of fingertip pulse to achieve a more accurate identity authentication and significantly improved security and anti-counterfeiting level.

Strengthening its strategy of medical applications, AUO incorporates the TFT manufacturing advantages to the investment of X-ray sensor. This time, AUO will demonstrate the flexible X-ray sensor featuring lightweight and unbreakable properties, which can substantially enhance product durability and is perfect for portable X-ray machine. This sensor is expected to replace the market dominance position of glass sensors and drive curved X-ray applications used for CT scan and industrial pipe/tube detection. AUO’s 17x17-inch X-ray display applies a-Si process and possesses an extremely small pixel size of 100μm and 4302 x 4302 ultra-high resolution image to provide a larger display area with better image quality as well as assist a more accurate diagnosis of signs. Besides the traditional static X-ray used on chest and orthopedic diagnoses, the demands of dynamic and 3D imaging including blood and oral applications are increasing. To meet these demands, AUO releases a 6x6-inch X-ray display achieved by LTPS TFT process to deliver a higher refresh rate and lower image noise and provide a low-dose X-ray solution when it is necessary to take multiple dynamic images.

In addition to demonstrating various applications of innovative technologies, AUO Senior Associate Vice President Mr. Ivan Wu will deliver a speech entitled “Sensing Technology and Application” during 2021 Touch Taiwan to share AUO’s experiences of utilizing its display technologies to create a tighter connection of human-machine interface through introducing next-generation sensing technology into application field.

AUO is committed to facilitating industry-academia cooperation and bridging learning and field for years. This time, AUO co-organizes I-Zone, national innovative display zone, in Touch Taiwan and invites domestic industrial, academic and research organizations to present projects including smart display material, component and system full of originality. Besides the cash prize of Invention Award sponsored by AUO, the awardee also has the opportunity to win a summer internship at the company to be engaged in the industrial ecosystem as early as possible, realizing all the new and innovative ideas.