1759 results about "Colored light" patented technology

A light emitting electric toothbrush and method therefore is disclosed which is intended for use by children, is comprised of a robust high-strength, plastic construction, and employs both light and vibration to assist in the development of suitable dental hygiene skills. In its most fundamental embodiment, the light emitting electric toothbrush comprises a construction including a handle having a bottom end and a top end and a toothbrush shaft mounted to the top end of the handle. The brush shaft is comprised of a plastic resin including a fluorescent colored light refractive additive for optimizing light transmission through the brush shaft. A high intensity light source is mounted within the top end of the handle for generating light and a domed-shaped optical lens is positioned over the high intensity light source for directing the generated light into the brush shaft. Finally, a switched electrical source is included for energizing the light source and the generated light therefrom creates a glowing illumination in the brush shaft for illuminating a dental cavity of a person during brushing of the teeth. In a preferred embodiment, the toothbrush also includes a vibrating motor mounted within the handle for causing the brush shaft to vibrate. The vibrating motor is also energized by the switched electrical source simultaneously with the light source.

Various embodiments described herein comprise illuminators comprising a phosphor color wheel for producing colored light. Light of a first wavelength emitted by a light source is incident on a phosphor color wheel comprising a plurality of different regions, where at least one of these regions comprises a phosphor that fluoresces at a second wavelength when illuminated with light of the first wavelength. The light from the light source and the different regions of the phosphor color wheel are movable with respect to each other such that as the different regions are illuminated by the light, different colors are produced.

A device for displaying images positions a luminescent material between a light source and a liquid crystal display (LCD). The light source, which comprises one or more nonpolar or semipolar III-nitride based light emitting diodes (LEDs), emits a primary light having a specified polarization direction and comprising one or more first wavelengths. This primary light emitted by the light source is a linearly polarized light that eliminates any need for a polarizer. The luminescent material, which comprises one or more phosphors, is optically pumped by the primary light and emits a secondary light having the polarization direction of the primary light, wherein the secondary light is comprised one or more second wavelengths that are different from the first wavelength. This secondary light emitted by the luminescent material is a colored light that eliminates any need for a color filter. The LCD receives the secondary light and displays one or more images in response thereto.

A mirror includes a housing, a mirror subassembly including a reflector layer with a portion defining an opening, and an indicia panel covering the opening and configured to form a visual display. At least one light source is positioned in the housing to pass light through the indicia panel and the opening of the mirror subassembly to selectively illuminate the visual display. The at least one light source emits a light matched in color to the indicia panel so that a maximum of light from the at least one light source passes through the indicia panel and is visible to a vehicle driver. Optimally, the light sources emit an amber colored light, and the indicia panel includes a diffusing layer also having an amber color.

An OLED display device for displaying a color image includes an array of different colored independently controllable light emitting elements arranged in repeated patterns, a number of light emitting elements of at least one color in each pattern being different than a number of light emitting elements of a different color and the different number of light emitting elements of the different colors being a function of a relative human visual frequency response to the colors, and a relative size of light emitting elements of different colors being a function of a lifetime of the light emitting elements, an efficiency of the light emitting elements, and the number of light emitting elements of the different colors in the pattern, wherein at least one of the lifetime, and the efficiency is different for different colors.

A vehicle system is disclosed that includes a vehicle lamp assembly including a plurality of LEDs that emit white light so as to function as an illuminator light. The lamp assembly also may include a plurality of LEDs that emit colored light to function as a signal light. The lamp assembly may include a camera. The lamp assembly may serve as a CHMSL or as a tail light. The system also includes a controller that rapidly pulses the LEDs at a rate that is imperceivable by the human eye. The pulsing intervals of the LEDs may be related to the readout intervals of the camera sensor array. In this manner, the LEDs may be pulsed on during camera readout to increase the illumination while the camera is capturing an image, or may be pulsed off during camera readout to prevent feedback glare from interfering with image capture by the camera.

An outdoor light system comprising a plurality light elements linked to a central controller. Each light element include a translucent shell, plurality of LEDs positioned so as to emit a light show through the shell A compartment for receiving and securing a replaceable volatile active cartridge and a heater for enabling the device to effectively emit an active ingredient from the cartridge when the cartridge is secured in the compartment. A white light source may be provided in each device as a source of illumination along with the LEDs The devices can be used as white light sources, for displaying a coordinated colored light shows, for displaying colored light schemes and for volatile active emission. The devices of disclosed the system may include an acoustic transducer for producing light and sound shows. The device may also include a light sensor, a motion detector and / or a microphone or acoustic receiver thereby enabling the light and sound shows to be dependent upon ambient light intensity, motion detection and / or ambient noise. The devices and systems are suitable for outdoor home lighting, porch and deck lighting and path / driveway lighting.

A multicolor optical image-generating device comprised of an array of grating light valves (GLVs) organized to form light-modulating pixel units for spatially modulating incident rays of light. The pixel units are comprised of three subpixel components each including a plurality of elongated, equally spaced apart reflective grating elements arranged parallel to each other with their light-reflective surfaces also parallel to each other. Each subpixel component includes means for supporting the grating elements in relation to one another, and means for moving alternate elements relative to the other elements and between a first configuration wherein the component acts to reflect incident rays of light as a plane mirror, and a second configuration wherein the component diffracts the incident rays of light as they are reflected from the grating elements. The three subpixel components of each pixel unit are designed such that when red, green and blue light sources are trained on the array, colored light diffracted by particular subpixel components operating in the second configuration will be directed through a viewing aperture, and light simply reflected from particular subpixel components operating in the first configuration will not be directed through the viewing aperture.

Reflective color filters using layers of cholesteric liquid crystals with two different center wavelengths and bandwidths per layer are stacked in two layers to provide colored light for displays. With a two layer stack circularly polarized light of one handedness can be provided. With a two layer stack circulary unpolarized colored light can be provided. With a broadband polarizing filter overlapping other filters in the stack a black matrix can be provided by reflecting all colors and transmitting no light in the overlapping areas. When broadband reflective cholesteric liquid crystals are used two primary colors can be reflected in the same pixel of a display making reflective layers with two reflective portions per layer possible. Color displays having three linear sub-pixels with three primary colors or with four sub-pixels of white, blue, green, and red in a pixel with two colors in a top row and two colors on a bottom row can are made with two colors per layer in two layer stacks. The pixels in the display are arranged such that multiple adjacent sub-pixels in a layer, or row in a layer, with the same color makes the color filters easier to manufacture. Displays using these reflective color filters may have a reflective polarizer for viewing the display at wide angles without color distortion.

An electronic device comprising a population of quantum dots embedded in a host matrix and a primary light source which causes the dots to emit secondary light of a selected color, and a method of making such a device. The size distribution of the quantum dots is chosen to allow light of a particular color to be emitted therefrom. The light emitted from the device may be of either a pure (monochromatic) color, or a mixed (polychromatic) color, and may consist solely of light emitted from the dots themselves, or of a mixture of light emitted from the dots and light emitted from the primary source. The dots desirably are composed of an undoped semiconductor such as CdSe, and may optionally be overcoated to increase photoluminescence.

Electronic circuitry for color-mixing in an LED light fixture during AC power dimming is disclosed to achieve adjustable color temperature. According to one embodiment, a dimmable LED light fixture has first, second, and third LED light sources, the first and second LED light sources producing white light, the third LED light source producing colored light, the LED driver configured to power the LED light sources by providing a single-channel variable-DC current source having two output terminals, and a current regulator for maintaining the current in the third LED light source path substantially constant as the LED driver output current is decreased when the AC power is reduced by the dimmer module, thereby altering the color of the light produced by the combination of the LED light sources.

Pixels for a large video display which employs solid-state emitters, such as colored light emitting diodes, as light source are formed by outfitting each colored solid state emitter within the pixel with an individually tailored miniature intensity-enhancing optical system. Each of these miniature optical systems comprises a set of four wide field-of-view Lambertian reflectors 34, a pair of narrow field-of-view Lambertian reflectors 36, and a beam-shaping lens 38. The miniature intensity-enhancing optical system can be specifically designed to restrict emission in the vertical field-of-view, while providing a Lambertian intensity dependence throughout an unrestricted horizontal view. For example, the field-of-view in the vertical direction may be limited to about .+-.30.degree. while the field-of-view is about .+-.90.degree. in the horizontal direction.

An organic light-emitting device includes a substrate, an anode and a cathode disposed over the substrate, and a light-emitting layer disposed between the anode and the cathode wherein the light-emitting layer includes a host and at least one dopant. The host of the light-emitting layer is selected to include a solid organic material including a mixture of at least two components wherein the first host component is an organic compound capable of transporting electrical charges and also forms an aggregate, and the second component of the mixture is an organic compound capable, of transporting electrical charges and, upon mixing with the first host component, is capable of forming a continuous and substantially pin-hole-free layer. The dopant of the light-emitting layer is selected to collect excitons and produce colored light, and an electron-transporting layer is disposed between the light-emitting layer and the cathode for providing improved electron injection and transport.

A flame simulating device includes a substantially translucent shell having a hollow interior, a plurality of colored light sources, positioned within the hollow interior of said shell and a light source driving device for selectively activating each of said plurality of light sources. Each of the light sources are alternately and individually activated to have active periods and such that the surface of said shell is illuminated to produce an animated flame effect. In one example implementation, yellow, orange and red LEDs are positioned at varying heights within the flame-shaped shell and activated on and off in a sequence that follows a set of color transition rules in order to provide a close simulation of the flickering of a flame. During their active periods, LEDs are blinked on and off to conserve power.

A polymer-dispersed liquid crystal based display is embedded inside a lightguide illuminator sheet which provides illumination of the display without the need for a backlight or frontlight. Light from one or more light sources is coupled into the lightguide sheet and is guided within a range of high angles of incidence within the sheet by total internal reflection. The guided light illuminating portions of the display which are in diffusing state is scattered such that some of the light is allowed to escape total internal reflection, providing visibility of the display. Guided light illuminating portions of the display which are in non-diffusing state remains guided within the lightguide illuminator sheet. Combining multiple lightguide embedded displays can be used to provide a three-dimensional display. When a low refractive index cladding is applied to the surfaces of the lightguide embedded display, the display is robust in a dirty environment, and / or can be laminated to adjacent lightguide embedded displays. The use of one or more coupled light sources, such as light emitting diodes, provides color by combining one or more colored light sources or by time-sequentially driving one or more colored light sources. The lightguide illuminator embedded display may further be used as a content dependent active backlight for an LCD display panel to provide improved dynamic contrast.

A color display using an organic electroluminescence element, includes, on a substrate, plural pixels each being area-divided into plural sub-pixels including at least two sub-pixels that each emit colored light of different wavelengths and a white sub-pixel, in which the white sub-pixel is further area-divided into at least two sub-sub-pixels that each emit colored light of different wavelengths, wherein the at least two sub-pixels and the at least two sub-sub-pixels each have an organic electroluminescence layer that emits a white light and a color filter. A color display which allows a high definition color display and is easily produced, and a method for producing the color display are provided.

An optical imaging system including an illumination system, a Cartesian PBS, and a prism assembly. The illumination system provides a beam of light, the illumination system having an f / # less than or equal to 2.5. The Cartesian polarizing beam-splitter has a first tilt axis, oriented to receive the beam of light. A first polarized beam of light having one polarization direction is folded by the Cartesian polarizing beam splitter and a second polarized beam of light having a second polarization direction is transmitted by the Cartesian polarizing beam splitter. The Cartesian polarizing beam splitter nominally polarizes the beam of light with respect to the Cartesian beam-splitter to yield the first polarized beam in the first polarization direction. The color separation and recombination prism is optically aligned to receive the first polarized beam. The prism has a second tilt axis, a plurality of color separating surfaces, and a plurality of exit surfaces. The second tilt axis maybe oriented perpendicularly to the first tilt axis of the Cartesian polarizing beam-splitter so that the polarized beam is nominally polarization rotated into the second polarization direction with respect to the color separating surfaces and a respective beam of colored light exits through each of the exit surfaces. Each imager is placed at one of the exit surface of the color separating and recombining prism to receive one of the respective beams of colored light, wherein each imager can separately modulate the polarization state of the beam of colored light.

A semiconductor light-emitting device and a method for manufacturing the same can include a wavelength converting layer located over at least one semiconductor light-emitting chip in order to emit various colored lights including white light. The semiconductor light-emitting device can include a base board, a frame located on the base board, the chip mounted on the base board, a transparent material layer located between the wavelength converting layer and a side surface of the chip so as to extend toward the wavelength converting layer, and a reflective material layer disposed at least between the frame and both side surfaces of the wavelength converting layer and the transparent material layer. The semiconductor light-emitting device can be configured to improve light-emitting efficiency of the chip by using the reflective material layer as a reflector, and therefore can emit a wavelength-converted light having a high light-emitting efficiency from a small light-emitting surface.

A color liquid crystal display using reflective color filters using layers of cholesteric liquid crystals is disclosed. The reflective color filters have two different center wavelengths and bandwidths per layer and are stacked in two layers to provide colored light for displays. With various numbers of layers in the stack, different polarization levels are provided. The pixels in the display of the invention are arranged such that multiple adjacent sub-pixels in a layer with the same color makes the color filters easier to manufacture.

A semiconductor light-emitting device and a method for manufacturing the same can include a wavelength converting layer in order to emit various colored lights including white light. The device can include a board, a frame located on the board, at least one light-emitting chip mounted on the board, the wavelength converting layer located between an optical plate and an outside surface of the chips so that a density of a peripheral region is lower than that of a middle region, and a reflective material layer disposed at least between the frame and a side surface of the wavelength-converting layer. The device can have the reflective material layer form each reflector and can use a wavelength converting layer having different densities, and therefore can emit a wavelength-converted light having a high light-emitting efficiency and a uniform color tone from various small light-emitting surfaces.

A tandem OLED device having spaced electrodes includes broadband light-emitting units disposed between the electrodes that produce different emission spectra and each light-emitting unit produces light that has multiple spaced peak spectral components, and an intermediate connector disposed between each of the light-emitting units. The device also includes an array of at least three different color filters associated with the device which receives light from the broadband light-emitting units, the band pass of each of the color filters being selected to produce different colored light, wherein the full width at about half maximum of at least one of such spaced peak spectral components produced by each emitting unit is within the band pass of a color filter, and wherein each of the at least three different color filters receives at least one spaced peak spectral component having a full width at about half maximum that is within its band pass.

A system and method for generating white light involves using a combination of white, red, green, and blue LEDs to produce white light and adjusting the emitted light in response to feedback signals. A light system has a light source that includes at least one white LED and multiple color LEDs and a spectral feedback control system configured to detect light that is output from the light source and to adjust the light that is output from the light source in response to the light detection. The spectral feedback control system may include a color sensor configured to provide color-specific feedback signals, a controller configured to generate color-specific control signals in response to the color-specific feedback signals, and a driver configured to generate color-specific drive signals in response to the color-specific control signals.

An apparatus for forming a colored image on a display, includes a VCSEL array device having a plurality of light-emitting pixels wherein each light-emitting pixel produces a beam of light including substantial components in a portion of the visible spectrum so that different light-emitting pixels produce different colored light; and a light shutter layer for each light-emitting pixel providing a modulator disposed in the path of the corresponding light beam for selectively passing corresponding colored light for providing a colored light image on the display.

A gaming machine for conducting a wagering game includes a game display and at least one illumination device. The game display is for displaying the wagering game and the illumination device is for presenting artistic elements such as marquee lettering and candle lighting. One aspect of the illumination device is a formed material with at least one LED embedded within. The formed material contains light dispersion particles and is of a nature that allows the light from the embedded LEDs to emit from the surface in an effectively uniform manner. In a different embodiment, an illumination device, comprised of a colored light source, associated electronic components that are enclosed within the gaming machine's housing, and a transparent object, directs light from the light source through the structure of the transparent object positioned over the source, and displays the color and intended intensity of the light on an altered surface on the transparent object.