Backlight unit and display apparatus comprising same

A backlight unit comprising:

• a light guide plate configured to diffuse and transmit light that is incident on the light guide plate;
• and
• a white light emitting member configured to convert incident light transmitted by the light guide plate to white light based on application of an electrical signal to the white light emitting member, and to output the white light,
• wherein the white light emitting member comprises a base layer in which a plurality of color conversion particles and a plurality of electro-optical particles are interspersed,
• wherein the plurality of color conversion particles are configured to convert the incident light into light of a specific color,
• wherein the plurality of electro-optical particles are configured to adjust an amount of the incident light converted into the light of the specific color by changing optical properties of the plurality of electro-optical particles based on the electrical signal to adjust a temperature of the white light, and
• wherein the base layer comprises:
• a first base layer in which the plurality of electro-optical particles are dispersed;
• and
• a second base layer in which the plurality of color conversion particles are dispersed, and
• wherein the first base layer and the second base layer are sequentially arranged such that the first base layer is positioned between the light guide plate and the second base layer.

A backlight unit comprising:

• a light guide plate configured to diffuse and transmit light that is incident on the light guide plate;
• and
• a white light emitting member configured to convert incident light transmitted by the light guide plate to white light based on application of an electrical signal to the white light emitting member, and to output the white light,
• wherein the white light emitting member comprises a plurality of color conversion particles configured to convert the incident light to the white light and a deformable polymer material configured to expand and contract according to the application of the electrical signal, and
• wherein a color temperature of the white light is adjusted by adjusting a density of the plurality of color conversion particles according to the expansion and contraction of the deformable polymer material based on the application of the electrical signal.

A display apparatus comprising:

• a light source configured to emit light;
• a light guide plate configured to diffuse and transmit first light that is emitted from the light source;
• a white light emitting member configured to convert incident first light transmitted by the light guide plate to white light based on application of an electrical signal to the white light emitting member, and to output the white light, the white light comprising a part of the first light, second light, and third light having different wavelengths from each other;
• and
• a display panel configured to generate an image using the white light output by the white light emitting member,
• wherein the white light emitting member comprises a single base layer comprising a deformable polymer material in which a plurality of first color conversion particles configured to convert one part of the incident first light into the second light, a plurality of second color conversion particles configured to convert another part of the incident first light into the third light, and a plurality of electro-optical particles are interspersed, and
• wherein the plurality of electro-optical particles are configured to adjust an amount of the incident first light converted into the light of the second light and the third light by changing optical properties of the plurality of electro-optical particles based on the electrical signal, and wherein the color temperature of the white light is adjusted by adjusting a density of the plurality of color conversion particles according to the expansion and contraction of the deformable polymer material based on the application of the electrical signal.