| 摘要 |
<p>An electronic pen for reading a location by having a camera which photographs a specific pattern image on a liquid crystal display and an electronic blackboard using the electronic pen are provided to have no touch panel or no sensor which is replaced according to a screen size, thereby removing limitation according to a screen size. An electronic blackboard device comprises an electronic pen unit(104), a liquid crystal display window unit(100), a computer unit(101), a liquid crystal display controller unit(102), and an electronic pen information receiving unit(103). The electronic pen unit reads a location by having a camera which photographs a specific pattern on a liquid crystal display. The liquid crystal display window unit displays lecture contents. The computer unit comprises a program which outputs the lecture contents on a liquid display window by driving the lecture contents such as picture and document. The liquid crystal display controller unit converts an image information signal of VGA or DVI type outputted from a video card mounted in a computer into a suitable signal format applied to the liquid display window.</p> |
