| 摘要 |
<p>Apparatus for providing an expanding or contracting line of light for use as a pointer in an analog display device. The apparatus comprises a strip of fused fibre optic material housed in an opaque plate, and a light plate, comprising a series of light bulbs in intimate contact with the back side of the opaque plate. In one embodiment, the light bulbs are directly behind the strip of fibre optic material, while in another embodiment the light bulbs are off-set in alternating arrangement with respect to the fibre optic material. An embodiment wherein only every second bulb is activated, to thereby give a dotted effect, is also taught.</p> |
