An electro-absorption modulator (EAM) is configured to include an on-chip AC ground plane that is used to terminate the high frequency RF input signal within the chip itself. This on-chip ground termination of the modulation input signal improves the frequency response of the EAM, which is an important feature when the EAM needs to support data rates in excess of 50 Gbd. By virtue of using an on-chip ground for the very high frequency signal content, it is possible to use less expensive off-chip components to address the lower frequency range of the data signal (i.e., for frequencies less than about 1 GHz).

A liquid crystal display device is provided. The liquid crystal display device comprises a liquid crystal cell and a backlight module, and the liquid crystal cell comprises a color filter, an array substrate, a liquid crystal layer, an upper polarizer, and a lower polarizer. The color filter comprises a glass substrate, a plurality of black matrixes, and a plurality of color blocks, and the color blocks are doped with infrared quantum dots, the array substrate comprises a plurality of infrared sensing layers, the infrared sensing layers are located within corresponding shielding areas of the array substrate on which the black matrixes project. The in-panel recognition can be implemented through integrating the infrared quantum dots in the color blocks of the liquid crystal display device and disposing the infrared sensing layers in the shielding areas of the array substrate.

Liquid ink compositions containing quantum dots for optoelectronic display applications are provided. Also provided are solid films formed by drying the ink compositions, optical elements incorporating the solid films, display devices incorporating the optical elements, and methods of forming the solid films, optical elements, and the devices. Liquid ink compositions and solid films made by drying the liquid ink compositions include one or more blue light-absorbing materials in combination with red light-emitting QDs or green light-emitting QDs.

A system and method providing correlated color temperature-tunable (CCT-tunable) white light using a laser diode(s) in conjunction with a III-Nitride nanowires-based LED element grown on a semi-transparent substrate. The tunability spans across yellow, amber, and red wavelengths and can be implemented by current injection. The current-dependent broad wavelength tunability enables control of wide range of CCT values (intensity, peak wavelength, and spectral coverage). The broad coverage in the yellow-amber-red color regime mimics that of a passive yellow phosphor, while the injection of current into the LED element defines an active phosphor element. The semi-transparent active phosphor element allows direct transmission of light from a laser diode(s) for achieving extreme wide tunability of CCT.

A display device includes a planar array of blue light-emitting diodes (LEDs) that are each configured to generate a blue output light, wherein the planar array is positioned parallel to a light-receiving surface of a liquid crystal module and a nanocrystal material that is disposed between the planar array and the liquid crystal module, and the liquid crystal module. The nanocrystal material is configured to: receive the blue output light, convert a first portion of the blue output light to a green light emission, convert a second portion of the blue output light to a red light emission, and transmit a remainder portion of the blue output light. The liquid crystal module is configured to generate an image that includes a portion of the green light emission, a portion of the red light emission, and a portion of the remainder portion of the blue output light.

A liquid crystal display device is provided. The liquid crystal display device comprises a liquid crystal cell and a backlight module, and the liquid crystal cell comprises a color filter, an array substrate, a liquid crystal layer, an upper polarizer, and a lower polarizer. The color filter comprises a glass substrate, a plurality of black matrixes, and a plurality of color blocks, and the color blocks are doped with infrared quantum dots, the array substrate comprises a plurality of infrared sensing layers, the infrared sensing layers are located within corresponding shielding areas of the array substrate on which the black matrixes project. The in-panel recognition can be implemented through integrating the infrared quantum dots in the color blocks of the liquid crystal display device and disposing the infrared sensing layers in the shielding areas of the array substrate.

An optoelectronic device and a method of manufacturing the same. The device comprising: a multi-layered optically active stack; an input waveguide, arranged to guide light into the stack; an output waveguide, arranged to guide light out of the stack; and anti-reflective coatings, located between both the input waveguide and the stack and the stack and the output waveguide; wherein the input waveguide and output waveguide are formed of silicon nitride.

A display apparatus includes a light-source substrate portion which generates light; and a color control portion to which the generated light from the light-source substrate portion is incident and at which color of the generated light is adjusted to define a color-converted light having a color different from that of the generated light. The color control portion includes: an exit surface through which the color-converted light exits the color control portion; a substrate including a plurality of concave portions defined therein, each of the concave portions extended along a direction from the light-source substrate portion to the exit surface of the color control portion; and a plurality of color conversion members respectively in the plurality of concave portions, the color conversion members each including a color-converting material which converts the color of the generated light to the color of the color-converted light.

Embodiments of a display device are described. The display device includes a first sub-pixel with a first quantum dot (QD) film and a first filter element. The QD film receives both UV light and blue light and converts a portion of the received light to emit a secondary light different from the UV and blue light. The filter element is disposed on the quantum dot film and allows the secondary light to pass through the filter element, and the filter element blocks an unconverted portion of the received light from passing through the filter element. The second sub-pixel has a second filter element that allows blue light to pass through the second filter element, and the second filter element blocks the UV light from passing through the second filter element.

A silicon based electro-optically active device and method of producing the same. The silicon based electro-optically active device comprising: a silicon-on-insulator (SOI) waveguide; an electro-optically active waveguide including an electro-optically active stack within a cavity of the SOI waveguide; and a lined channel between the electro-optically active stack and the SOI waveguide, the lined channel comprising a liner; wherein the lined channel is filled with a filling material with a refractive index similar to that of a material forming a sidewall of the cavity, to thereby form a bridge-waveguide in the channel between the SOI waveguide and the electro-optically active stack.