An electronic device includes a light emitting diode and a light converting layer disposed on the light emitting diode. The electronic device emits a green output light under an operation of a highest brightness. The green output light has an output spectrum. An intensity integral of the output spectrum from 380 nm to 489 nm is defined as a first intensity integral. An intensity integral of the output spectrum from 490 nm to 780 nm is defined as a second intensity integral. A ratio of the first intensity integral over the second intensity integral is defined as a first ratio, and the first ratio is greater than 0% and less than or equal to 7.5%.

Optical stacks are disclosed. In particular, optical stacks having a reflective polarizer and an optical compensation film are disclosed.

Polarizing beam splitter plates and systems incorporating such beam splitter plates are described. The polarizing beam splitter plate includes a first substrate and a multilayer optical film reflective polarizer that is disposed on the first substrate. The polarizing beam splitter plate includes a first outermost major surface and an opposing second outermost major surface that makes an angle of less than about 20 degrees with the first outermost major surface. The polarizing beam splitter plate is adapted to reflect an imaged light received from an imager towards a viewer or screen with the reflected imaged light having an effective pixel resolution of less than 12 microns.

Disclosed in the present invention is a packaging composite material comprising polarizing films, the packaging composite material comprising: a polarizing layer, comprising two or more layers of polarizing film, wherein polarization directions of at least two layers of polarizing film have an included angle which is not 0°. The packaging composite material of the present invention has a simple structure, strong light-blocking properties, a high light-blocking rate, and a broad-spectrum light-blocking effect. Also disclosed in the present invention are the use of the packaging composite material in packaging, and the use of the packaging composite material in a label. When used as packaging or a label, the packaging composite material can extend the shelf life of products which need to be stored in the dark.

A system, method and device for use as a reflector for a light emitting diode (LED) are disclosed. The system, method and device include a first layer designed to reflect transverse-electric (TE) radiation emitted by the LED, a second layer designed to block transverse-magnetic (TM) radiation emitted from the LED, and a plurality of ITO layers designed to operate as a transparent conducting oxide layer. The first layer may be a one-dimension (1D) distributed Bragg reflective (DBR) layer. The second layer may be a two-dimension (2D) photonic crystal (PhC), a three-dimension (3D) PhC, and/or a hyperbolic metamaterial (HMM). The 2D PhC may include horizontal cylinder bars, vertical cylinder bars, or both. The system, method and device may include a bottom metal reflector that may be Ag free and may act as a bonding layer.

A polarizer, a liquid crystal display module, and a simulation method for liquid crystal display compensation are disclosed. A compensation film includes three layers of uniaxial compensation films. Each of the three uniaxial compensation films has a slow axis which is configured at a same slow axis angle and is perpendicular to an absorption axis of a polarizing film, and each of the three uniaxial compensation films has only an in-plane phase difference or an out-of-plane phase difference. In this manner, it only needs to adjust thickness of each layer of the compensation film when simulating a design of the compensation film or preparing the polarizer, so that an in-plane phase difference and an out-of-plane phase difference of the compensation film can be separately set at will.

A polarizing plate and an optical display apparatus are provided. A polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer, and the first retardation layer has a short wavelength dispersion of about 1 to about 1.03, a long wavelength dispersion of about 0.98 to about 1, and an in-plane retardation of about 180 nm to about 220 nm at a wavelength of 550 nm, the second retardation layer has a short wavelength dispersion of about 1 to about 1.1, a long wavelength dispersion of about 0.96 to about 1, and an in-plane retardation Re of about 70 nm to about 120 nm at a wavelength of 550 nm, and a ratio of out-of-plane retardation of the second retardation layer at a wavelength of 550 nm to thickness thereof is about −33 nm/μm to about −15 nm/μm.

A vehicle display mirror system is disclosed. The system comprises a display device and a reflecting polarizer. The display device is operable to display image data on a display surface as display light. The reflecting polarizer comprises a light receiving surface proximate the display surface and configured to output the display light in a first polarization from an emitting surface. The system further comprises a liquid crystal element, a polarizing element, and a controller. The controller is in communication with the liquid crystal element and configured to selectively align a liquid crystal material to pass the display light through the liquid crystal element and deactivate the liquid crystal element to adjust a received light from the first polarization to a second polarization and reflect the second polarization from the emitting surface.

Provided is a liquid crystal display device and a polarizing plate capable of improving the contrast ratio in the front direction. The polarizing plate includes a pair of polarizers including a first polarizer and a second polarizer whose transmission axes are parallel to each other; a retarder between the paired polarizers; and a diffusion layer in at least one of a region between the paired polarizers or a region on a side without the retarder of the first polarizer.

A composite film including a first polarizing film, at least one second polarizing film, and at least one first phase compensation film is provided. The first polarizing film has a first transmission axis. Each second polarizing film has a second transmission axis parallel to the first transmission axis. The at least one first phase compensation film is disposed between the first polarizing film and the at least one second polarizing film. Each first phase compensation film has a first optical axis. An orthographic projection of the first optical axis on the first polarizing film is parallel to an axial direction of the first transmission axis, and a first included angle between the first optical axis and the first polarizing film is greater than 0 degrees and less than 90 degrees. A display device is also provided.