Flat light source
A flat light source including a first substrate, a second substrate, a sealant, several sets of dielectric pattern and a phosphor layer is provided. The first substrate has electrodes thereon. The sealant is disposed between the first and second substrates to form a space between the first and second substrates and the sealant. These sets of dielectric pattern are formed in the space between the first and second substrates. Each set of dielectric pattern has at least two dielectric strips, and each dielectric strip covers one of the electrodes correspondingly. Each dielectric strip has a top surface and two side surfaces, and the top surface has an uneven contour. The phosphor layer is disposed between the two dielectric strips of each set of dielectric pattern, and the phosphor layer is further disposed on the top surface of the dielectric strips.
1. A flat light source, comprising:
a first substrate having a planar surface and a plurality of electrodes disposed on the planar surface, wherein the first substrate has no groove on the planar surface thereof;
a second substrate;
a sealant disposed between the first and second substrates to form a space between the planar surface of the first substrate, second substrates and the sealant;
a plurality of sets of dielectric pattern formed in the space between the first and second substrates, each set of dielectric pattern having at least two dielectric strips, and each dielectric strip covering one of the electrodes correspondingly, wherein each dielectric strip has a top surface and two side surfaces, and the top surface has an uneven contour;
a phosphor layer disposed between the dielectric strips of each set of dielectric pattern, wherein the phosphor layer is further disposed on the top surface of the dielectric strips; and
a plurality of spacers disposed in the space between the first and second substrates, wherein the height of the dielectric strips is the same as that of the spacers.
2. The flat light source as claimed in claim 1 , wherein the phosphor layer is further disposed between the adjacent sets of the dielectric pattern.
3. The flat light source as claimed in claim 1 , wherein the phosphor layer is further coated onto the surfaces of the spacers.
4. The flat light source as claimed in claim 1 , wherein the height of the dielectric strips is less than that of the spacers.
5. The flat light source as claimed in claim 1 , wherein the height of the dielectric strips is the same as the gap between the first and second substrates.
6. The flat light source as claimed in claim 1 further comprising a reflective layer disposed on the surface of the first substrate.
7. The flat light source as claimed in claim 1 , further comprising another phosphor layer disposed on the second substrate.