Display device having reduced cell seal area and method of manufacturing display device
A display device includes: a first substrate in which a display area and a non-display area disposed outside the display area are defined; a second substrate facing the first substrate; and a cell seal disposed on the non-display area, where the cell seal includes a bonding filament connecting the first substrate and the second substrate to each other.
1. A method of manufacturing a display device, the method comprising:
sealing an original panel including a cell including a first substrate and a second substrate facing each other; and
forming a cell seal to seal the cell,
wherein the forming the cell seal comprises forming a bonding filament between the first substrate and the second substrate by radiating a laser, forming a frit in the cell, and curing the frit to form a frit seal, and
wherein the frit seal and the bonding filament are connected to each other,
wherein the bonding filament is in direct contact with and of a same material as the first and second substrates.
2. The method of claim 1 ,
wherein the laser includes a first sub laser radiated toward the first substrate from the second substrate,
wherein a first focal point of the first sub laser is inside the first substrate,
wherein a focus depth of the first sub laser is in a range of about −100 micrometers to about zero micrometer, and
wherein the focus depth of the first sub laser is measured from a surface of the first substrate which faces the second substrate.
3. The method of claim 2 ,
wherein the laser further includes a second sub laser radiated toward the second substrate from the first substrate,
wherein a second focal point of the second sub laser is inside the second substrate,
a focus depth of the second sub laser is in a range of about zero micrometer to about 100 micrometers, and
wherein the focus depth of the second sub laser is measured from a surface of the second substrate which faces the first substrate.
4. The method of claim 3 ,
wherein at least one of the first sub laser and the second sub laser is radiated at a predetermined inclination angle inclined with respect to a thickness direction of the first substrate.
5. The method of claim 1 , further comprising:
removing an insulation film disposed on the first substrate.
6. The method of claim 1 ,
wherein the forming the bonding filament between the first substrate and the second substrate by radiating the laser comprises:
forming a first bonding filament by radiating the laser in a first direction; and
forming a second bonding filament by radiating the laser in a second direction,
wherein the first bonding filament and the second bonding filament intersect each other to form an intersection portion.
7. The method of claim 1 , wherein the bonding filament comprises a central portion and a peripheral portion surrounding the central portion, and
wherein a refractive index of the central portion of the bonding filament is different from a refractive index of the peripheral portion of the bonding filament.
8. The method of claim 1 , wherein the bonding filament comprises an inner bonding filament and an outer bonding filament,
wherein the inner bonding filament and the outer bonding filament partially overlap each other, and,
wherein a refractive index of an overlap area of the inner bonding filament and the outer bonding filament and a refractive index of a peripheral portion of the inner bonding filament are different from each other.