Color conversion sheet, backlight unit, and display device
AssigneeLG Display Co., Ltd.
InventorKiSung Lim
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure relate to a color conversion sheet, a backlight unit, and a display device, in which a color conversion sheet realizing white light from blue light includes a green reflection filter positioned between a green color conversion layer and a red color conversion layer, thereby independently exciting the green light and the red light and increasing the amount of green light supplied to the display panel while preventing the green light from being excited into red light. Therefore, it is possible to increase the brightness of white light supplied through the color conversion sheet and provide a backlight unit with improved luminance efficiency.
Claims19
A display device comprising:
- a display panel;
- and
- a backlight unit configured to supply light to the display panel,
- wherein the backlight unit comprises:
- a plurality of light sources configured to emit light in a first wavelength band;
- and
- a color conversion sheet arranged between the light sources and the display panel, and
- wherein the color conversion sheet comprises:
- a first color conversion layer configured to react to the light in the first wavelength band and emit light in a second wavelength band;
- a second color conversion layer positioned between the light sources and the first color conversion layer, and configured to react to the light in at least a portion of the first wavelength band and the second wavelength band and emit light in a third wavelength band;
- and
- a first reflection filter positioned between the first color conversion layer and the second color conversion layer, and configured to separate the first color conversion layer from the second color conversion layer and reflect the light in at least a portion of the second wavelength band.
A color conversion sheet comprising:
- a first color conversion layer configured to react to light in a first wavelength band, and emit light in a second wavelength band;
- a second color conversion layer configured to react to light in at least a portion of the first wavelength band and the second wavelength band, and emit light in a third wavelength band;
- and
- a reflection filter positioned between the first color conversion layer and the second color conversion layer, and configured to separate the first color conversion layer from the second color conversion layer and reflect light in at least a portion of the second wavelength band and transmit light in at least a portion of the third wavelength band,
- wherein a peak wavelength in a spectrum of the light emitted from the first color conversion layer is less than a peak wavelength in a spectrum of the light emitted from the second color conversion layer.
Dependencies are inferred from the claim text.