61results about How to "Reduce blue light" patented technology

An improved multi-layer performance lens for protective eyewear such as sunglasses which includes a pass band Rugate filter. The lens design is a sandwich configuration including a polarizing layer between two ophthalmic lens layers in a sandwich configuration, and a Rugate filter applied to one side thereof to yield an exceptional light transmission profile under all light conditions, thereby maximizing protection as well as clarity of vision. In addition, an optional dielectric layer and / or hydrophobic overcoat may be applied. The foregoing layers are arranged to provide a balanced light transmission profile optimum for preventing macular degeneration, cataracts and other ocular injuries.

The invention concerns an illumination apparatus for an optical observation device (10), in particular a stereomicroscope or a stereo surgical microscope. A multi-armed light guide with coupler (2) mixes colored light emitted by light-emitting diodes (1a–c) to yield white mixed light (15).

An improved lens with Rugate filter specifically designed to be worn in prescription and non-prescription glasses, contact lenses, intraocular lenses and sunglasses, and to provide protection against macular degeneration by reducing harmful visible blue light transmission and ocular photochemical damage. The lens at least includes a single lens layer with a Rugate filter deposited thereon to selectively block visible blue light. Other layers may be added including a polarizing layer, dielectric layer and / or color tint in a lens sandwich configuration, to additionally give a high degree of UVA and UVB protection, color contrast, and glare reduction. The Rugate filter is a stop band which yields an exceptional light transmission profile under all light conditions, thereby maximizing protection as well as clarity of vision. In the multi-layer embodiment, all of the lens layers provide comprehensive protection for preventing macular degeneration, cataracts and other ocular injuries, yet maintain a balanced light transmission profile for visual acuity.

A display panel with reduced short-wavelength blue light is provided and includes a backlight module and an LCD panel. The backlight module includes a plurality of LEDs, each of which includes a blue LED die configured to emit blue light with a peak wavelength ranging from 455 to 475 nm. The present invention may efficiently reduce blue light with wavelengths less than 455 nm to protect eyes, and may not reduce display brightness and encounter color aberration. Moreover, the backlight module may further include an optical filter sheet or film configured to filter blue light with wavelengths less than 455 nm, and may further reduce blue light with wavelengths less than 455 nm to protect eyes more while modulating reduced display brightness and reduce color aberration.

The object of this invention is an ophthalmologic lens for pseudoaphakic eyes and / or eyes suffering macular and retinal degeneration, created by applying a yellow pigment filter to a regular ophthalmologic lens, to protect the eye from the short wavelengths of the visible spectrum (under 500 nm). This invention avoids the difficulties and risks of the techniques currently available to protect eyes subjected to cataract surgery and improves protection in eyes with neurodegeneration through the simple use of an ophthalmologic lens. The invention is comprised of a common ophthalmologic lens and a yellow pigment that absorbs short wavelengths of light of 350 / 500 nm, both appropriate for use in humans.

The object of this invention is an ophthalmologic lens for pseudoaphakic eyes and / or eyes suffering macular and retinal degeneration, created by applying a yellow pigment filter to a regular ophthalmologic lens, to protect the eye from the short wavelengths of the visible spectrum (under 500 nm). This invention avoids the difficulties and risks of the techniques currently available to protect eyes subjected to cataract surgery and improves protection in eyes with neurodegeneration through the simple use of an ophthalmologic lens.The invention is comprised of a common ophthalmologic lens and a yellow pigment that absorbs short wavelengths of light of 350 / 500 nm, both appropriate for use in humans.

Ophthalmic eyewear is provided, comprising a frame and a spectacle lens having a filter and being disposed within the frame or a contact lens having a filter disposed thereon or therein. The filter comprises a spectral characteristic that modulates the transmission of ambient light to protect the eyes of the wearer from damage and loss of vision caused by high energy wavelengths of light.

The invention applies to the technical field of illumination and provides a quasi natural light LED light source. The quasi natural light LED light source comprises a base layer, at least one light-emitting assembly arranged on the base layer and a circuit connected with the light-emitting assemblies; each light-emitting assembly comprises a white-light-emitting body and a red-light-emitting body,each white-light-emitting body comprises a first chip and an optical conversion film, and each red-light-emitting body comprises a red light chip; red light is used for compensating for a red light part which lacks in white light compared to natural spectrum to the white light to form quasi natural light; and relative spectral power of the red light in the quasi natural light is greater than 0.60, the relative spectral power of cyan light is greater than 0.30, and the relative spectral power of blue light is less than 0.75. The quasi natural light LED light source can emit the quasi natural light, the blue light is reduced, the cyan light and the red light are added, protecting of eyesight is facilitated, sub-health problems are reduced, the problem that the cyan light is difficult to addin the field is solved, and a color rendering index is further improved; meanwhile, the red light is added, so that the health illumination level is improved; in addition, the quasi natural light LEDlight source is simple in composition, convenient to adjust and apply, high in reliability and good in adaptability.

A backlight module and liquid crystal display device are disclosed. The backlight module includes: at least one first light-emitting unit having a first blue light-emitting chip; at least one second light-emitting unit having a second blue light-emitting chip, wherein, an emission peak wavelength of the second blue light-emitting chip is greater than an emission peak wavelength of the first blue light-emitting chip; and a control circuit used for dynamic adjusting a brightness of the first light-emitting unit and the second light-emitting unit according to the blue saturation. The present invention can dynamically adjust the output amount of the blue light according to the blue saturation so that the present invention can selectively decrease the blue light when maintaining the display brightness and chroma.

A project is provided that includes a light source including three light emitting units in which a plurality of LEDs are disposed and which emits red light, green light, and blue light. A liquid crystal light valve is provided that modulates the red light, the green light, and the blue light emitted from the light source. The projector is constructed so as to be capable of projecting and displaying an image on a screen by projecting the light modulated by the liquid crystal light valve onto the screen. The light source is constructed with one out of the light emitting units including a different number of LEDs than the other light emitting units so that a ratio between respective amounts of red light, green light, and blue light incident on the liquid crystal light valve with all of the LEDs lit satisfies a predetermined condition.

The invention relates to the technical field of display screens, in particular to an intelligent office conference display screen with a protection function, which comprises a display screen and a display screen outer frame mechanism, and is characterized in that the display screen is fixed in the display screen outer frame mechanism, and blue light emitted by the display screen is reflected through an anti-blue-light film attached to a plastic sheet, so that the purpose of protecting the eyesight of a user is achieved, and the functionality of the device is enhanced. When the display screen falls off, the acceleration sensor sends a signal to the PLC, the PLC controls the electric push rod to move upwards, the blocking piece moves upwards to expose the sealing rubber sheet with the notch,the air bag is inflated and extruded out of the sealing rubber sheet, and the buffering effect on the outer frame of the main body is achieved; thus, the display screen is prevented from being damaged due to collision between the main body outer frame and the ground, damage of the main body outer frame to a hit user can be reduced, the safety of the display screen in the using process is improved, and the device practicability is better.

Provided is a backlight module including a light source, a light guide plate, and a composite color-conversion layer. The light source emits a blue light. The light guide plate is optically coupled to the light source and the blue light transmits through the light guide plate. The composite color-conversion layer is disposed on the light guide plate. The composite color-conversion layer includes at least three different populations of quantum dots. The at least three different populations of quantum dots at least include a plurality of cyan quantum dots or a plurality of yellow quantum dots.