A display device includes a backlight and a display panel on the backlight. The backlight includes a light source to provide a first light, and an optical wavelength converter to receive the first light and emits a second light. The optical wavelength converter includes a light emitting part having a plurality of excitation light emitting bodies to be excited by receiving the first light, and thereby emit the second light, and a light absorbing part including a plurality of absorbers provided on the light emitting part to receive the second light and absorb a portion of the second light having a wavelength of about 550 nm to about 650 nm.

Disclosed are an optical member and a display device having the same. The optical member includes a first substrate, a plurality of wavelength conversion parts provided on the first substrate while being spaced apart from each other, and a sealing layer on a top surface of the wavelength conversion parts and at a lateral side of the wavelength conversion parts. Each of the wavelength conversion parts includes a host on the first substrate, and a plurality of wavelength conversion particles in the host.

To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

A lighting device (21) comprising a light guide (12) and LED packages (1) having two or more spatially separated LED chips (2,3,4) is described. The LED packages (1) generate two or more light outputs at two or more separate wavelengths which are optically coupled into the light guide (12). A portion of the two or more light outputs exit the light guide (12) via a light output surface (14). Wavelength dependent modification features (22) are arranged to modify the intensity of at least one of the two or more light outputs to provide the lighting device (21) with a homogeneous colour light output. The LED packages (1) may comprise RGB LED packages, and the wavelength dependent modification features (22) are arranged to provide a homogeneous white light output. This provides a lighting device (21) capable of providing low intensity light levels over a large surface area which are thinner and cheaper to produce than those devices known in the art.

An increase in cost is prevented and, at the same time, color irregularities in a lighting device and a display device including an arrangement of LEDs each including a plurality of LED chips mounted therein is prevented. An LED (10A2) is positioned so that its M-LED chip (13M2) is placed at a short distance from that one of G-LED chips (13G1) located adjacent to the M-LED chip (13M2) in both row-wise directions which is mounted in an LED (10A1) belonging to the same LED group (20A) as the LED (10A2).

The present invention relates to a film capable of enhancing color purity and correcting brightness for a liquid crystal display device, and a liquid crystal display device comprising the same, and can provide a liquid crystal display device having enhanced color gamut and color purity by introducing, to the inside of an adhesive layer or a coating layer of the liquid crystal display device, a combination of an absorption dye for absorbing a specific wavelength band and a fluorescent dye absorbing a specific wavelength band and emitting light, thereby blocking unnecessary wavelengths except for RGB wavelengths.

A display device is provided. The display device includes a light source emitting a blue light and a light emitting layer including a first group of red quantum dots and a second group of green quantum dots. The light emitting layer is configured to absorb a first portion of the blue light from the light source to emit red light and green light and to transmit a second portion of the blue light. The display device also includes dichroic filter layers to improve light recycling and backlight efficiency.

A light guide plate has a light input end surface from which light is introduced, a light output surface that outputs light spread in a planar manner externally, a flat main light guiding body including the light output surface, a light conducting portion that has a maximum thickness greater than the thickness of the main light guiding body and includes the light input end surface, a first slanted surface provided on the light conducting portion on at least one of a surface near the light output surface and a surface opposite thereto, the first slanted surface inclined from a first location that is thicker than the main light guiding body toward the outer surface of the main light guiding body, and a plurality of first pattern elements provided on the light conducting portion on at least one of a surface near the light output surface and a surface opposite thereto.

The present invention provides a backlight module and a display device. The backlight module includes a back plate; a light-emitting chip formed on the back plate and capable of emitting light rays of a first color; a packaging entity made of a light-transmitting material and configured to package the light-emitting chip onto the back plate; and a phosphor layer formed in the packaging entity and consisting of phosphors doped in the packaging entity. The phosphor layer is configured to convert a part of light rays among the light rays of the first color emitted from the light-emitting chip into light rays of a second color, so as to be mixed with the remaining, unconverted light rays of the first color to form white backlight.

A backlight unit according to an embodiment of the inventive concept includes a driving substrate and a plurality of first clusters and a plurality of second clusters arranged in rows and columns on the driving substrate, wherein the first clusters and the second clusters are alternately arranged in each row on the driving substrate, wherein at least one of the first clusters and at least one of the second clusters are repeatedly disposed in each column on the driving substrate, wherein each of the first clusters and each of the second clusters includes a plurality of light emitting diodes (LEDs), the first and second clusters having structures inverted to each other, wherein each of LEDs that are most adjacent to a row directional edge of the driving substrate, among the LEDs of the first and second clusters, is connected in parallel to a resistor.