Patent application number | Description | Published |
20100127629 | LIGHT EMITTING DEVICE - A light emitting device is disclosed herein. An embodiment of the light emitting device comprises a first plurality of light emitters comprising a first group and a second group, wherein the first group is connectable in series to the second group. A first driver is connected to the first group. A second driver is connectable to the second group. A first voltage comparator is coupled to the first driver, wherein the voltage comparator compares the voltage of the first driver to a predetermined voltage. The light emitting device is in a first state when the voltage of the first driver is below the predetermined voltage. The light emitting device is in a second state when the voltage of the first driver is greater than the predetermined voltage. The light emitting device is in the first state, the first group is connected in series with the second group to form a series circuit between the first driver and a reference voltage. When the light emitting device is in the second state, the first group is connected between the first driver and the reference voltage and the second group is connected between the second driver and the reference voltage. | 05-27-2010 |
20100149819 | LIGHT EMITTING DEVICE - A light emitting device is disclosed herein which includes a substrate, a housing, a light emitting die, and a cup with a reflective inner surface. The housing has an upper surface and at least one sidewall and is mounted on the upper surface of the substrate, thereby forming a cavity. The light emitting die is mounted on the upper surface of the substrate within the cavity. The cup is positioned within the cavity and is supported by the housing. The cup has a continuous sidewall with a reflective inner surface surrounding the light emitting die and a lowermost edge that is suspended above, detached and spaced away from the upper surface of the substrate. | 06-17-2010 |
20100302532 | PHOTODETECTOR HAVING DARK CURRENT CORRECTION - A method for determining the light intensity of a light signal in each of a plurality of spectral bands is disclosed and a method for fabricating a photodetector is also disclosed. | 12-02-2010 |
Patent application number | Description | Published |
20080204382 | COLOR MANAGEMENT CONTROLLER FOR CONSTANT COLOR POINT IN A FIELD SEQUENTIAL LIGHTING SYSTEM - A color management system for a field sequential lighting system. The color management system includes a plurality of light sources, a driver circuit, and a controller. The driver circuit is coupled to the plurality of light sources, and the controller is coupled to the driver circuit. The driver circuit drives the plurality of light sources. The controller generates first and second control signals for a first subframe of a temporal sequence of subframes. The first control signal corresponds to a first light source of a first color which is a primary color for the first subframe. The second control signal corresponds to a second light source of a second color which is a supplemental color for the first subframe. Embodiments of the color management system maintain a color point of the primary color of each subframe. | 08-28-2008 |
20080239321 | Photodectector Having Dark Current Correction - A photodetector and method for making the same is disclosed. The photodetector includes a substrate having first, second, and third photodiodes and first and second pigment filter layers. The first, second, and third photodiodes generate first, second, and third photodiode output signals, respectively, each photodiode output signal being indicative of a light intensity incident on that photodiode and a dark current that is independent of the light intensity. The first and second pigment filter layers overlie the first and second photodiodes while a layer having both the first and second pigment filter layers overlie the third photodiode. An output circuit combines the first and third photodiode output signals to provide a first corrected output signal and combines the second and third photodiode output signals to provide a second corrected output signal. | 10-02-2008 |
20090127431 | ILLUMINATION SYSTEM CALIBRATION AND OPERATION HAVING A CALIBRATION MATRIX CALCULATION BASED ON A SHIFT IN COLOR SPACE (AS AMENDED) - A method for calibrating an illumination system is disclosed herein. The illumination system comprises at least one light emitter and at least one color sensor. The method comprises emitting a first wavelength of light from the a light emitter and measuring the color of light emitted by the light emitter using the color sensors. A second wavelength of light is emitted from the a light emitter and the color of light emitted by the light emitter is measured using the color sensors. The shift in color space based on the measurements is calculated. At least one calibration matrix based on the shift in colors space is calculated. | 05-21-2009 |
20090213062 | COLOR CONTROL OF A BACKLIGHTING SYSTEM - In an embodiment, the invention provides a method of color control in a backlighting system comprising a plurality of light sources, a plurality of color sensors, a plurality of PWM controllers, and a video input for receiving video data. The plurality of light sources is activated during a first operative mode to produce white light. The plurality of light sources is controlled during a second operative mode to produce white light. | 08-27-2009 |
20090278262 | Multi-chip package including component supporting die overhang and system including same - A microelectronic package and a system including the package. The package includes: a substrate; a stack of dice electrically and mechanically bonded to the substrate, the stack including a second level die and a first level die between the substrate and the second level die, the second level die defining an overhang; and a component disposed between the substrate and the overhang of the second level die and adapted to support the overhang on the substrate. | 11-12-2009 |
20100277624 | System and Method for Canceling Dark Photocurrent in a Color Sensor Circuit - A system and method for canceling dark photocurrent in a color sensor circuit is disclosed. A color sensor is described including a color sensor circuit, a dark color sensor circuit, and a differential amplifier circuit. The color sensor circuit receives photocurrent from a color component of a light input. The color sensor circuit outputs a first voltage indicating intensity of the color component. The dark color sensor circuit receives dark photocurrent and outputs a second voltage indicating an offset voltage. The differential amplifier circuit is coupled to the color sensor circuit and to the dark color sensor circuit. The differential amplifier circuit receives the first and second voltages and outputs a final output that cancels contributions of the offset voltage in the first voltage due to the dark photocurrent. | 11-04-2010 |
Patent application number | Description | Published |
20100271842 | MULTI-COLOR ILLUMINATING BACK LIGHT STRUCTURE - In an embodiment, the invention provides a multi-color illuminating back light structure comprising a light guide, a reflector, at least one LED and a wavelength converter material. Micro-structures are formed on a first surface of the light guide. The reflector is attached to the first surface of the light guide. A wavelength converter material is deposited on a second surface of the light guide. At least one LED is optically coupled to at least one side of the light guide. A portion of light reflected from the micro-structures and the reflector is converted into light having at least one wavelength different from the wavelength of the reflected light. The light leaving the wavelength converter material comprises light with at least first and second wavelengths. | 10-28-2010 |
20130292706 | Infrared Attenuating Or Blocking Layer In Optical Proximity Sensor - An optical proximity sensor is provided that comprises an infrared light emitter an infrared light detector, a first molded optically transmissive infrared light pass component disposed over and covering the light emitter and a second molded optically transmissive infrared light pass component disposed over and covering the light detector. Located in-between the light emitter and the first molded optically transmissive infrared light pass component, and the light detector and the second molded optically transmissive infrared light pass component is a gap. Layers of infrared opaque, attenuating or blocking material are disposed on at least some of the external surfaces forming the gap to substantially attenuate or block the transmission of undesired direct, scattered or reflected light between the light emitter and the light detector, and thereby minimize optical crosstalk and interference between the light emitter and the light detector. | 11-07-2013 |
20140312234 | Optical Sensor With Special Discrimination - In one embodiment, an ambient light sensor with first and second photo-detectors is disclosed. The first and second photo-detectors may have different depths and respond differently to light having a specific wavelength. The ambient lights sensor may further comprise a circuit configured to detect light of a specific wavelength. In another embodiment, the first and second photo-detectors may be configured such that each of the first and second photo-detectors detects coupling current from each other. In yet another embodiment, in addition to the first and second photo-detectors, a third photo-detector may be formed proximate to at least one of the first and second photo-detectors such that coupling photo-current is detected therein by the at least one of the first and second photo-detectors. | 10-23-2014 |