Planar light source

A planar light source, comprising:

• a first substrate;
• a second substrate, disposed above the first substrate;
• and
• a sealant, disposed between the first and second substrates, for forming a cavity between the first substrate, the second substrate, and the sealant;
• multiple first electrodes, disposed on the first substrate;
• multiple sets of the first dielectric patterns, disposed in the cavity between the first and second substrates, wherein each set of the first dielectric patterns at least comprises two first striped dielectric patterns, and each of the first striped dielectric patterns covers one of the first electrodes correspondingly, while the edges of the top of each first striped dielectric pattern are raised in a peak shape;
• a phosphor layer, disposed on the first substrate, and located between the first striped dielectric patterns of each set of the first dielectric patterns;
• a discharge gas, disposed in the cavity;
• multiple second electrodes, disposed on the second substrate, wherein each of the second electrodes is located corresponding to a space between the first electrodes;
• and
• multiple second striped dielectric patterns, disposed on the second substrate and covering one of the second electrodes respectively.