Kopin Corp. of Taunton, Mass., and Motorola Inc., based in Hong Kong, have issued a challenge to engineers, designers and students: Design a portable commercial product that incorporates Kopin's active-matrix liquid crystal display and Motorola's VirtuoVue display technology. The winning design will receive the grand prize, $10,000. Other cash awards of $5000, $2000 and $1000 will go to the first-, second- and third-place winners. To enter, contestants must submit a write-up on how the virtual display can be incorporated into a product and how the market can benefit from the display technologies. Entries are being accepted until Oct. 30, 1998. For more information and an online entry form, visit Motorola's Web site, sps.motorola.com/vv_contest. Kopin's Web site is at www.kopin.com.