| 摘要 |
PURPOSE:To provide a flat light source having a uniform luminance and shaped as a thin plate, by determining the distance between linear electrodes, the width of each linear electrode, the length thereof, the pressure of a hermetically enclosed gas and the magnitude of a discharge current in accordance with prescribed conditions. CONSTITUTION:A plurality of linear conductors 18a disposed at equal intervals in parallel with each other are coated with electric insulation layers 18b and dielectric layers 18c of high secondary electron emission ratio so that linear electrodes 18 are constituted. A fluorescent material is applied to an inside surface of a discharge container 14, which faces the linear electrodes 18. In order to realize a luminous surface of uniform luminance, the distance d(mm) between the linear electrodes 18, the width W(mm) of each of the electrodes, the length l(mm) thereof, the pressure P(torr) of a hermetically enclosed gas and the magnitude I(mA) of a discharge current are determined in accordance with conditions represented by formulae I-IV, and voltages different in polarity are applied to the adjacent electrodes. |
