Qeexo, a US-based human–computer interaction technology spinout of Carnegie Mellon University, has raised $4.5m in its series B round.

Investors in the round include venture capital firms KTB Network, Sierra Ventures and Danhua Capital.

Qeexo creates technologies to enable better human-computer interaction. For example, its Fingersense technology can distinguish between a fingertip, knuckle, nail or stylus allowing for a wider range of options when using a touch screen device.

The funding will be used by the company to hire more staff and to increase its operations and research and development.

In 2014, Qeexo raised $2.3m in its series A round from Sierra Ventures.

Sang Won Lee, chief executive of Qeexo, said: “We continue to see enormous demand for our products and we have a dynamic and growing development pipeline poised to change the way people use technology.”