Patent application number | Description | Published |
20090034284 | MULTICOLOR ILLUMINATION DEVICE USING MOVING PLATE WITH WAVELENGTH CONVERSION MATERIALS - A multicolor illumination device using an excitation light source and a multi-segmented moving plate with wavelength conversion materials (e.g. phosphors) is disclosed. The exciting light source is a light emitting diode or a laser diode emitting in the UV and/or blue region. The wavelength conversion materials absorb the excitation light and emit longer wavelength light. Each segment of the moving plate contains a different wavelength conversion material or no wavelength conversion material. The plate is supported to move so that different segments are exposed to the excitation light at different times. The plate may be a wheel or rectangular in shape and rotates or oscillates linearly. When the plate moves, light of different colors is generated sequentially in time by the different wavelength conversion materials in different segments of the plate. The multicolor illumination device may be used in a projector system having a microdisplay imager for image display. | 02-05-2009 |
20100084671 | BRIGHTNESS ENHANCEMENT METHOD AND APPARATUS OF LIGHT EMITTING DIODES - A light source with enhanced brightness includes an angle-selective optical filter and a light emitting diode (LED) having a high reflective layer. The angle-selective filter is located on the top surface of emitting diode to pass lights at specified angles. According to one embodiment, the angle-selective filter comprises index-alternating layers. With a reflective polarizer, the light source can produce polarized light with enhanced brightness. | 04-08-2010 |
20110249436 | HIGH BRIGHTNESS ILLUMINATION DEVICE USING DOUBLE-SIDED EXCITATION OF WAVELENGTH CONVERSION MATERIALS - An illumination devices using excitation light and a wavelength conversion material to generated converted light for illumination, where the wavelength conversion material is excited by multiple excitation lights from both sides to achieve increased brightness. The excitation lights incident on the two sides of the wavelength conversion material may have the same color or different colors. Light separation structures are provided on both sides of the wavelength conversion material to separate the excitation light and the converted light. Light separation may be based on color difference or etendue difference of the excitation light and converted light. In one particular example, wavelength conversion material is formed on a surface of an LED which acts as the first excitation light source, and a second excitation light is delivered through a light separation structure onto the other side of the wavelength conversion material. | 10-13-2011 |
20120068630 | LIGHT SOURCE, WAVELENGHT CONVERSION METHOD, WAVELENGHT CONVERSION DEVICE, AND SYSTEM FOR LIGHT SOURCE - A light source device includes a light emitting element and a wavelength conversion device. The wavelength conversion device includes a stationary member, a moveable carrier made of a transparent material carrying one or more wavelength conversion materials and moveable relative to the stationary member, and a stationary first filter. The first filter is fixed on the stationary member and disposed adjacent the moveable carrier. The excitation light from the light emitting element passes through the first filter and illuminates the wavelength conversion materials on the moveable carrier. The wavelength conversion materials convert the excitation light into converted light as the output of the light source device. The size of the first filter is smaller than the size of the moveable carrier and smaller than a carrying area of the moveable carrier that carries the wavelength conversion material. A wavelength conversion method using the wavelength conversion device is also described. | 03-22-2012 |
20120075589 | POLARIZED LIGHT SOURCE AND POLARIZATION CONVERTING METHOD AND DEVICE THEREOF - A polarized light source comprises a light emitting source and a polarization conversion device. The polarization conversion device comprises a fixing device ( | 03-29-2012 |
20120120120 | LIGHT SOURCE, CONTROL METHOD FOR LIGHT SOURCE, AND PROJECTION SYSTEM HAVING LIGHT SOURCE - A light source includes a first light emitting source ( | 05-17-2012 |
20120120647 | ILLUMINATION DEVICE FOR STAGE LIGHTING WITH HIGH LIGHT-COMBINING EFFICIENCY - An illumination device for stage lighting with high light-combining efficiency includes at least two LED arrays ( | 05-17-2012 |
20120147601 | ILLUMINATION SYSTEM FOR STAGE LIGHTING AND METHOD FOR PROVIDING HIGH-BRIGHTNESS WHITE LIGHT - An illumination system for stage lighting and a method for providing high-brightness white light are provided. The illumination system for stage lighting includes LED arrays ( | 06-14-2012 |
20120153852 | LED ILLUMINATING DEVICE FOR STAGE LIGHTING AND METHOD FOR IMPROVING COLOR UNIFORMITY OF THE DEVICE - A LED illumination device for stage lighting includes LED arrays ( | 06-21-2012 |
20120242934 | BACKLIGHT SOURCES HAVING REDUCED THICKNESS AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - A backlight source and a thinning method for the same are provided. The backlight source includes: a solid state light source array having a plurality of solid state light sources ( | 09-27-2012 |
20130003368 | MULTICOLOR ILLUMINATION DEVICE USING MULTIPLE LIGHT SOURCES AND A MOVING PLATE WITH WAVELENGTH CONVERSION MATERIALS - A multicolor illumination device uses a blue or UV light source to excite wavelength conversion materials and a red light source as a direct illumination light. The lights from the two light sources are combined onto a moving wavelength conversion element. The moving wavelength conversion element includes multiple segments alternatingly disposed in the paths of the incident lights, including a first segment with no wavelength conversion material, and other segments which may carry blue, green and/or yellow wavelength conversion materials. A control system controls the on/off of the two light sources so that when the first segment is in the light path, the red light source is on and the blue/UV light source is off, and vice versa when the other segments are in the light path. Alternatively, dichroic filters may be fixedly provided on the segments of the wavelength conversion element to block the blue/UV or red light. | 01-03-2013 |
20130050981 | Method and Apparatus for Solid State Illumination - A light source includes two excitation light sources generating two respective excitation lights, a filter, and a wavelength conversion material. The second excitation light has a peak wavelength shorter than that of the first excitation light. The transmittance curves of the filter are dependent on the input angle. The first and second excitation lights are inputted to the filter at angles smaller than a first threshold angle, and angles between the first and a third threshold angle, respectively. Both excitation lights pass through the filter to excite the wavelength conversion material, which generates a converted light but reflects some of the excitation lights. Part of the reflected first excitation light reaches the filter at input angles greater than a second threshold angle and is reflected by the filter back to the wavelength conversion material for recycling. The third and second threshold angles are greater than the first threshold angle. | 02-28-2013 |
20130063704 | METHOD AND APPARATUS OF WHITE BALANCE ADJUSTMENT - A white balance adjustment method and apparatus for a single DLP projector system is disclosed. The projection system includes a solid state light source device, a sync signal generator, and a controller. The light source device generates an output which is a repeating color sequence of at least two primary color lights. The sync signal generator generates a synchronization signal representing a timing of the color sequence of the output light. The controller calculates drive current values corresponding to each of the two primary colors based on a target white balance and measured color properties of the output light, and supplies a modulated drive current to the light source device. The modulated drive current is synchronized to the sync signal and has the calculated drive current values. As a result, a white light having the target white balance is output. | 03-14-2013 |
20130070449 | HIGH RECYCLING EFFICIENCY SOLID STATE LIGHT SOURCE DEVICE - A light source device includes a LED light source or a wavelength conversion material having a near Lambertian light emitting surface. The light source device includes a light recycling system to reflect small-angle lights (lights closer to the normal direction of the light emitting surface) back to the light source, and a collection system for collecting and outputting large-angle lights (lights farther away from the normal direction). The lights reflected by the light recycling system is scattered by the emitting surface in all directions, where the large-angle scattered lights are collected by the light collection system and the small-angle scattered light is reflected by the light recycling system again. A second excitation light source without wavelength conversion material or a second light source with its own wavelength conversion material may be provided, and the second light is directed to the light emitting surface by appropriate optical components. | 03-21-2013 |
20130075633 | Method and Apparatus of Drive Currents Control Over a Solid State Light Source - A solid state light source module includes two solid state light sources, a light combining device for combining the lights from the two sources, a color wheel receiving the combined light and alternatingly outputting at least two primary color lights, a sync signal generator coupled to the color wheel for generating a periodic sync signal, and a controller for supplying a drive signal to each solid state light sources based on the sync signal. During at least one sub-period of the period, one of the two solid state light sources is turned on by its drive signal and the other one is kept in an inactive state by its drive signal. | 03-28-2013 |
20130100639 | HIGH LUMINANCE MULTICOLOR ILLUMINATION DEVICES AND RELATED METHODS AND PROJECTION SYSTEM USING THE SAME - An illumination device and a projection system using the same. The illumination device includes two or more color channels each including one or more light sources for generating a color light. At least one of the color channels includes light sources of a first type for generating a first (narrow band) light and light sources of a second type for generating a second light. The dominant wavelengths of the first and second lights are within 50 nm of each other, and the width of the combined spectrum (sum of normalized spectra of the first and second lights) is greater than the width of the spectrum of the first light by at least 10 nm. A wavelength-based light combiner is used to combine the color lights from the color channels into a combined light | 04-25-2013 |
20130100644 | LIGHT SOURCES SYSTEM AND PROJECTION DEVICE USING THE SAME - This invention provides a light source system and a projection device. The light source system includes an excitation light source for generating a excitation light, a wavelength conversion device, a supplemental light source for generating a supplemental light, a light introducing device for directing the supplemental light to the wavelength conversion device, a light collection device for collecting the supplemental light that scattered and reflected by the wavelength conversion device. By setting the relative sizes of the light introducing device and the light collection device, the luminous flux of the supplemental light that is lost due to the light introducing device is less than or equal to a quarter of that the luminous flux of the supplemental light collected by the light collection device. The converted light is supplemented by the supplemental light. | 04-25-2013 |
20130114049 | Light source device and projection display method - The present invention discloses a method and apparatus for a projection system using a solid-state light source and a color wheel. A set of primary light sources (such as RGB light source) with a light source controller is utilized to replace the UHP lamp. The color wheel has multiple color filter segments that are sequentially disposed on the path of the light when the wheel rotates. Based on a sync signal received from the rotating color wheel, the light source controller sequentially turns the primary light sources on and off in accordance with the sequence of the color filter segments of the color wheel. During each of the spoke periods, to generate a varying mixture of the two color lights, at least two primary color light sources are turned on simultaneously. | 05-09-2013 |
20130229634 | METHOD AND APPARATUS FOR A SOLID STATE LIGHT SOURCE - A light source device uses a wavelength down conversion material for absorbing an excitation light and generating a converted light, and a color filter for filtering the converted light to generate a different color light as output. The wavelength conversion material is a yellow or green phosphor which absorbs blue or UV light and generates a yellow or green converted light, which has a sufficiently wide spectrum to cover some of the red color region. The color filter only allows the red component of the converted light to be output. This system is more energy efficient than using a red phosphor. This light source may be implemented as a moving phosphor wheel having multiple segments, one of which being the yellow or green phosphor with the corresponding color filter, the other segments being used to generate other colored lights such as green and blue lights. | 09-05-2013 |
20130242533 | METHOD AND APPARATUS FOR A COLOR FILTER - A method and apparatus for a color filter that utilizes a wavelength conversion material such as phosphor to filter an input light. The input light contains unwanted shorter wavelength light and wanted longer wavelength light. The wavelength conversion material converts the light in the unwanted shorter wavelength range to the wanted longer wavelength range, and transmits the light in the wanted longer wavelength range, to generate an output light in the longer wavelength range. The filter may be a transmissive type of a reflective type. The filter may be constructed as a moving filter such as a rotating wheel. | 09-19-2013 |
20130250546 | LIGHT SOURCE - A light source comprising an excitation light source ( | 09-26-2013 |
20130258639 | PROJECTION SYSTEM, LIGHT SOURCE SYSTEM AND LIGHT SOURCE ASSEMBLY - Provided is a projection system, a light source system, and a light source assembly. The light source system ( | 10-03-2013 |
20130271954 | LIGHT SOURCE SYSTEM AND IMAGE PROJECTION SYSTEM - A light source system using an excitation light source and a multi-segmented color wheel device with wavelength conversion materials is disclosed. The color wheel device includes a first area having two or more first segments and a second area having two or more second segments for receiving the excitation light. The color wheel device is driven by the driving device periodically, so that a first light sequence is generated by the two or more first segments in the first working mode and a second light sequence is generated by the two or more second segments in the second working mode. The first light sequence is different from the second light sequence. The first and second working modes are switched by a switching device. The light source system may be used in image projection system generating two or more different lights sequences in different working modes. | 10-17-2013 |
20140043829 | OPTICAL-WAVELENGTH CONVERTING WHEEL COMPONENT - An optical-wavelength converting wheel component comprises a motor ( | 02-13-2014 |
20140111776 | Phosphor Layer, Component, Corresponding Light Source, Projection System and Corresponding Manufacturing Method - A phosphor layer comprising a phosphor plate adhesively formed by a phosphor powder and an adhesive agent. The phosphor plate has a front side and a back side. The phosphor layer also have particles which are fixedly connected to the front and/or back side of the phosphor plate. Also provided in the present invention are a phosphor component, a corresponding light source, a projection system, and a method for manufacturing the phosphor layer. The phosphor component prevents adhesion between the phosphor plate and substrates thereof in high temperature conditions. | 04-24-2014 |
20140347860 | METHOD FOR PRODUCING HIGH-LUMINANCE MONOCHROMATIC LIGHT BASED ON OPTICAL WAVELENGTH CONVERSION AND LIGHT SOURCE - Disclosed is a method for producing a high-luminance monochromatic light based on optical wavelength conversion, which is used in a light source comprising an excitation light source, and comprises the steps of: setting a first wavelength conversion material and a second wavelength conversion material; using an excitation beam to excite the first wavelength conversion material and the second wavelength conversion material, wherein the first wavelength conversion material absorbs the excitation light to produce a first excited light; the second wavelength conversion material absorbs a first waveband portion of the first excited light to produce a second excited light, where the energy of the absorbed first waveband portion is more than 50% of the total energy of the first excited light; mixing the second excited light and the unabsorbed portion of the first excited light together to form the high-luminance monochromatic light. | 11-27-2014 |
20150022787 | LIGHT SOURCE SYSTEM AND PROJECTION SYSTEM APPLIED THEREBY - A light source system and a projection system applied thereby. The light source system includes a light source ( | 01-22-2015 |
20150062903 | LIGHT EMITTING DEVICE AND PROJECTION SYSTEM ADOPTING SAME - A light emitting device and a projection system adopting same. The light emitting device ( | 03-05-2015 |
20150077974 | HIGH RECYCLING EFFICIENCY SOLID STATE LIGHT SOURCE DEVICE - A light source device includes a LED light source or a wavelength conversion material having a near Lambertian light emitting surface. The light source device includes a light recycling system to reflect small-angle lights (lights closer to the normal direction of the light emitting surface) back to the light source, and a collection system for collecting and outputting large-angle lights (lights farther away from the normal direction). The lights reflected by the light recycling system is scattered by the emitting surface in all directions, where the large-angle scattered lights are collected by the light collection system and the small-angle scattered light is reflected by the light recycling system again. A second excitation light source without wavelength conversion material or a second light source with its own wavelength conversion material may be provided, and the second light is directed to the light emitting surface by appropriate optical components. | 03-19-2015 |