External-electrode discharge lamp, external-electrode discharge lamp manufacturing method, and backlight unit

摘要

The present invention aims to provide an external-electrode discharge lamp able to suppress luminance variation, a manufacturing method for the lamp, and a backlight unit. A lamp (10) of the present invention includes a glass tube (11) sealed at both ends, and electrodes (18) and (19) provided around outer circumferential peripheries of the ends in the axial direction of the glass tube (11). During operation of the lamp (10), the electrodes (18) and (19) and the glass tube (11) between the electrodes (18) and (19) and a discharge space (14) equivalently function as first and second capacitors, whose capacitances are substantially the same.