Optical member and display device having the same

A display device comprising:

• a light source including a blue light emitting diode generating light;
• a PCB (printed circuit board) having the light source mounted thereon;
• a light guide plate into which light from the light source is incident;
• a reflective sheet under the light guide plate;
• an optical member on the light guide plate;
• and
• a display panel on the optical member,
• wherein the optical member is provided under the display panel,
• wherein the optical member converts the wavelength of incident tight from the light source and outputs light with the converted wavelength to the display panel,
• wherein the optical member comprises:
• a lower substrate;
• an upper substrate on the lower substrate;
• a host between the lower substrate and the upper substrate;
• a plurality of wavelength conversion particles in the host;
• and
• a sealing layer between the lower substrate and the upper substrate,
• wherein the sealing layer of the optical member is in direct physical contact with the host;
• wherein a surface of the host that is in direct physical contact with the sealing layer comprises an inclined surface, which is inclined with respect to a top surface of the lower substrate,
• wherein the lower substrate and the upper substrate include a same material,
• wherein the lower substrate and the upper substrate include polyethylene terephthalate (PET),
• wherein the wavelength conversion particles comprise quantum dots,
• wherein the light source is disposed on a lateral side of the light guide plate,
• wherein the wavelength conversion particles comprise quantum dots,
• wherein the light source is disposed on a lateral side of the light guide plate,
• wherein the display panel includes a plurality of color filters,
• wherein the host includes a concavo-convex pattern and the inclined surface is a portion of the concavo-convex pattern,
• wherein the concavo-convex pattern of the host includes convex parts and a concave part between the convex parts, and
• wherein a width of each convex part of the concavo-convex pattern is in a range of from 65 μm to 120 μm.