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In July 2020, Synaptics acquired DisplayLink, the developer of software and semiconductors that connect visual devices to computers. Under Hurlston's leadership the company focused on growing its IoT business, expanding from its focus on sensors on glass towards development of low-power sensors to IoT devices. In August 2019, the board of directors appointed Michael Hurlston as the new CEO. The two acquisitions were intended to aid Synaptics' expansion into the Internet of things (IoT) market. At the same time, Synaptics acquired Marvell Technology Group's Multimedia Solutions unit, which creates video and audio processing technology. In July 2017, Synaptics acquired Conexant Systems, an Amazon Alexa partner that creates voice and audio software and silicon products for smart homes. This was the world’s first full-production smartphone with fingerprint authentication directly in the OLED display. In January 2018, the Chinese company Vivo announced a smartphone featuring Synaptics' optical fingerprint sensor.

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After improving the technology, the company sent it into full production a year later. The company introduced its first optical-based fingerprint sensor in December 2016, which would allow the sensor to be placed under smartphones' glass displays rather than under a separate button. In July 2015, Synaptics announced a unique “match-in-sensor” fingerprint authenticator for laptops and other devices that authenticates the fingerprint within the chip. In 2015, the company expanded into additional markets, including automotive, wearables and PC peripherals.

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The acquisition enabled Synaptics to combine touch and display driver technologies into a single 'TDDI' (Touch and Display Driver Integration) chip.

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Synaptics acquired Renesas SP Drivers Inc., a Japanese company specializing in chips that manage LCD displays, in 2014. In late 2013, Synaptics acquired Validity Sensors, a fingerprint sensor vendor, adding fingerprint sensing technology to the company. In 2012, Synaptics introduced the first pressure recognizing touchscreen, which allowed multi-finger and variable-force input. In 2011, the company appointed Rick Bergman to succeed Francis Lee as CEO. It had touch sensitivity on the back of the phone, the ability to interact with the phone by squeezing, animated icons, a user interface sensitive to the phone's orientation and tilt, and haptic gestures. In 2009, Synaptics announced the development of the Fuse concept smartphone. The company's touch technology was used in LG's Prada phone in 2007, which was the world's first mobile phone with a capacitive touchscreen. The Onyx's touch sensor could tell the difference between a finger and a cheek, preventing accidental inputs during calls. In October 2006, Synaptics provided a live demonstration of the Onyx, a concept smartphone with a color touchscreen enabled by its ClearPad touch controller technology. In 2005, Synaptics sensors were featured in the Samsung B310, the first mobile phone to use capacitive-touch technology.

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Synaptics also provided a similar but vertical click wheel for the Creative Zen Touch portable media player.

In 2004, Apple debuted the iPod Mini and fourth-generation iPod, both featuring a scrolling click wheel that used Synaptics' capacitive touch technology. As adoption of the touchpad grew, Synaptics sought to integrate the technology with other products.

The company had an initial public offering in 2002. By 1994, Twinhead and Epson America had adopted Synaptics' touchpad for their computers (Epson with the ActionNote), followed by Apple in 1995 and later by other computer manufacturers, including Compaq and Dell. The pad was a replacement for trackballs and mice used at the time. In 1992, the company used the pattern recognition techniques it developed to build the world's first touchpad for laptop computers that allowed users to control the cursor and click with no additional mechanical buttons. The circuit uses basic physics principles in order to select the strongest signal from the different processors.

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In 1991, Synaptics patented a refined 'winner take all' circuit for teaching neural networks how to recognize patterns and images. They used their research on neural networks and transistors on chips to build pattern recognition products. Federico Faggin and Carver Mead founded Synaptics in 1986.