A display panel includes: a light emitting device to generate light; a plurality of color conversion patterns including: a first color conversion pattern including first scattering particles dispersed in the first color conversion pattern and configured to scatter the light of the light emitting device; and a second color conversion pattern including second scattering particles dispersed in the second color conversion pattern and configured to scatter the light of the light emitting device; a plurality of color filters including: a first color filter overlapping the first color conversion pattern; and a second color filter overlapping the second color conversion pattern; and a single, low index of refraction layer substantially continuously extending in the surface direction to overlap the first and the second color conversion patterns. The single, low index of refraction layer has a refractive index lower than refractive indexes of the first and second color conversion patterns.

An electronic device having a biometric sensor is provided. The electronic device includes a first region including a plurality of first pixels arranged in a first manner and a second region including a plurality of second pixels arranged in a second manner, a biometric sensor disposed in at least a part of the first region, and a processor electrically coupled with the display and the biometric sensor, and configured to receive a user input through the first region, and control the biometric sensor to detect biometric information corresponding to the user input.

Embodiments described herein relate to nanostructured trans-reflective filters having sub-wavelength dimensions. In one embodiment, the trans-reflective filter includes a film stack that transmits a filtered light within a range of wavelengths and reflects light not within the first range of wavelengths. The film stack includes a first metal film disposed on a substrate having a first thickness, a first dielectric film disposed on the first metal film having a second thickness, a second metal film disposed on the first dielectric film having a third thickness, and a second dielectric film disposed on the second metal film having a fourth thickness.

A display device including: a first substrate; first through third subpixel electrodes which are disposed on the first substrate to neighbor each other; a second substrate opposing the first substrate; a first wavelength conversion pattern at least partially overlapping the first subpixel electrode and a second wavelength conversion pattern at least partially overlapping the second subpixel electrode; a first light transmission pattern at least partially overlapping the third subpixel electrode and a second light transmission pattern disposed between the first wavelength conversion pattern and the second wavelength conversion pattern; and a low refractive layer which has a lower refractive index than the first and second wavelength conversion patterns.

A display panel includes: a light emitting device to generate light; a plurality of color conversion patterns including: a first color conversion pattern including first scattering particles dispersed in the first color conversion pattern and configured to scatter the light of the light emitting device; and a second color conversion pattern including second scattering particles dispersed in the second color conversion pattern and configured to scatter the light of the light emitting device; a plurality of color filters including: a first color filter overlapping the first color conversion pattern; and a second color filter overlapping the second color conversion pattern; and a single, low index of refraction layer continuously extending in the surface direction to overlap the first and the second color conversion patterns. The low index of refraction layer has a refractive index lower than refractive indexes of the first and second color conversion patterns.

There is provided a display backlight (604), including an excitation source (644) for generating blue light (650); and a wavelength converter (654) being a unitary construction including a combination of a wavelength selective filter layer (658) bonded to a photoluminescence layer (660), where the photoluminescence layer (658) includes a green photoluminescence material and a red photoluminescence material; and where the wavelength selective filter layer (658) is transmissive to blue light and reflective to green and red light.

A display device includes a display panel including a lower substrate, a resonance unit disposed on the lower substrate, a pixel disposed on the resonance unit, and a polarizing plate disposed on the pixel and having a first polarization axis, where the pixel includes a first sub pixel which displays a first color and a second sub pixel which displays a second color different from the first color, and a backlight unit disposed below the display panel and which supplies backlight to the display panel where the resonance unit includes a first optical cavity having a first resonance frequency corresponding to the first color and a second optical cavity having a second resonance frequency corresponding to the second color.

A display device includes a liquid crystal display panel (3) and a backlight source (2), and further includes a plurality of bandpass filters (1) corresponding to respective pixel units of the liquid crystal display panel (3), the bandpass filters (1) being configured to perform narrowband filtering on the light emergent from the backlight source (2). By adopting the bandpass filters (1), the narrowband filtering on the red, green and blue light is realized by using a narrowband interference filtering method, such that the effect of improving the gamut of the display device is achieved and the high-gamut display is realized.

A display includes a display modulation layer, a backlight unit configured to generate light for illumination of the display modulation layer, and a filter film disposed between the backlight unit and the display modulation layer. The filter film includes a plurality of Bragg grating sets. Each Bragg grating set is configured to reflect the light in a wavelength-selective and angular-selective manner rearward toward the backlight unit.

An attenuation device for blue light includes a base and a blue light attenuating film system, the blue light attenuating film system including a film layer of first refractive index and a film layer of second refractive index alternately disposed on the same side of the base, a total number of the film layer of first refractive index and the film layer of second refractive index being 5 at least; wherein a film layer closest to the base and a film layer farthest from the base in the blue light attenuating film system are both the film layer of first refractive index, and the film layer of first refractive index has a refractive index greater than that of the film layer of second refractive index. A display device and a wearable product, as well as a preparation method of the attenuation device for blue light are further provided.