Quantum dot light-emitting device and display apparatus
AssigneeSamsung Display Co., Ltd.
InventorsJae-Byung PARK, Jong-Hyuk KANG, Hak-Sun KIM, Nam-Seok ROH, Dong-Hoon LEE
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Abstract
A quantum dot light-emitting device and a display apparatus including the same, the device including a light-emitting device that emits a first light; a quantum dot layer facing the light-emitting device, the quantum dot layer including a plurality of quantum dots, absorbing the first light, and emitting a second light and a third light that have different wavelength ranges compared to the first light; and a band pass filter on the quantum dot layer, the band pass filter cutting off a portion of the second light and a portion of the third light.
Claims20
A quantum dot light-emitting device, comprising:
- a light-emitting device that emits a first light;
- a quantum dot layer facing the light-emitting device, the quantum dot layer:
- including a plurality of quantum dots,
- absorbing the first light, and
- emitting a second light and a third light that have different wavelength ranges compared to the first light;
- and
- a band pass filter on the quantum dot layer, the band pass filter cutting off a portion of the second light and a portion of the third light.
A display apparatus, comprising:
- a backlight unit;
- and
- a display panel that receives light from the backlight unit and displays an image, the display panel including a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate,
- wherein the backlight unit includes a first region from which a first light is emitted, and a second region from which a second light and a third light are emitted, the second region including:
- a light-emitting device that emits a first light;
- a quantum dot layer facing the light-emitting device, the quantum dot layer:
- including a plurality of quantum dots,
- absorbing the first light, and
- emitting a second light and a third light that have different wavelength ranges compared to the first light;
- and
- a band pass filter on the quantum dot layer, the band pass filter cutting off a portion of the second light and a portion of the third light.
A display apparatus, comprising:
- a substrate, the substrate being divided to define a first sub-pixel area for emitting a blue light, a second sub-pixel area for emitting a green light, and a third sub-pixel area for emitting a red light;
- a pixel electrode on the substrate;
- an opposite electrode facing the pixel electrode;
- an intermediate layer between the pixel electrode and the opposite electrode, the intermediate layer including a plurality of quantum dots and emitting light;
- and
- a band pass filter on one of the pixel electrode and the opposite electrode, the one of the pixel electrode and the opposite electrode being adjacent to a side of the apparatus at which light is emitted,
- wherein the band pass filter:
- overlies the second sub-pixel area and the third sub-pixel area, and
- cuts off a portion of the green light and a portion of the red light.
Dependencies are inferred from the claim text.