Display apparatus comprising a quantum dot layer with red, blue and green quantum dots and light emitting diodes with a reflective layer

A display apparatus comprising:

• a light source module comprising:
• a substrate;
• a plurality of light emitting diodes provided on the substrate and configured to emit blue light having a wavelength greater than or equal to 430 nm and less than or equal to 449 nm;
• a plurality of optical domes, each optical dome of the plurality of optical domes covering a corresponding light emitting diode of the plurality of light emitting diodes;
• and
• a plurality of reflective layers, each reflective layer of the plurality of reflective layers being provided in front of a corresponding light emitting diode of the plurality of light emitting diodes in a corresponding optical dome of the plurality of optical domes;
• a diffuser plate provided in front of the light source module and configured to uniformly diffuse irregular light emitted from the light source module;
• and
• a quantum dot sheet provided in front of the diffuser plate and configured to change a wavelength of light emitted from the light source module,
• wherein the quantum dot sheet comprises:
• a red quantum dot configured to convert at least a portion of the blue light emitted from the light source module into red light;
• a green quantum dot configured to convert at least a portion of the blue light emitted from the light source module into green light;
• and
• a blue quantum dot configured to convert at least a portion of the blue light emitted from the light source module into blue light having a wavelength greater than or equal to 450 nm and less than or equal to 465 nm,
• wherein the quantum dot sheet comprises a first sheet and a second sheet that are separated from each other,
• wherein the first sheet is provided in front of the diffuser plate and comprises the red quantum dot and the green quantum dot, and
• wherein the second sheet is provided in front of the first sheet and comprises the blue quantum dot.