| 摘要 |
PURPOSE:To eliminate a luminance variance on the display surface, and also, to thin the device by using a fluorescent display tube for a back light instead of a fluorescent lamp. CONSTITUTION:A signal inputted to a liquid crystal display device is driven by a liquid crystal driver 13 of a drain side and a liquid crystal driver 14 of a gate side, irradiated by a fluorescent display tube 15, and displayed of liquid crystal panel 12. That is, a filament 8 is driven by an AC power source, a bias is applied to a control grid 9, and a bias is applied to a conductive layer 10 provided with a phosphor layer. The conductive layer 10 is protected by a ceramic substrate 11. An electron radiated from the filament 8 is controlled by the grid 9, and accelerated and reaches the conductive layer 10 to which a voltage of scores of volts is applied. In that case, when the phosphor layer emits light, its emitted light passes through a TFT panel 2 and by driving of the liquid crystal driver 13, a switching operation of a liquid crystal 3 emits it to the outside of a color filter 1. |
