BOE Technology Group, a Beijing company that is China’s largest crystal display maker, invested $50 million in Israeli medical device company Cnoga Medical. Cnoga produces devices that measure common vital signs optically, based on skin color changes in a person’s fingertip. For its investment, BOE now owns a 24% stake in Cnoga (the transaction values Cnoga at $212 million) and has two board seats. The two companies will market Cnoga’s products jointly in China, and Cnoga will develop a new line of products for professional use.