Patent application number | Description | Published |
20100006818 | LIGHT EMITTING DIODE - A light emitting diode which includes a laminate including an n-type cladding layer, an emission layer which has a quantum well structure having a well layer and a barrier layer, an intermediate layer and a p-type cladding layer in this order, wherein the composition of each of the layers is represented by the composition formula: (Al | 01-14-2010 |
20110062413 | LIGHT-EMITTING DIODE AND METHOD FOR FABRICATION THEREOF - A light-emitting diode includes a substrate, a compound semiconductor layer including a p-n junction-type light-emitting part formed on the substrate, an electric conductor disposed on the compound semiconductor layer and formed of an electrically conductive material optically transparent to the light emitted from the light-emitting part and a high resistance layer possessing higher resistance than the electric conductor and provided in the middle between the compound semiconductor layer and the electric conductor. In the configuration of a light-emitting diode lamp, the electric conductor and the electrode disposed on the semiconductor layer on the side opposite to the electric conductor across the light-emitting layer are made to assume an equal electric potential by means of wire bonding. The light-emitting diode abounds in luminance and excels in electrostatic breakdown voltage. | 03-17-2011 |
20110298002 | LIGHT-EMITTING DIODE, LIGHT-EMITTING DIODE LAMP, METHOD FOR MANUFACTURING LIGHT-EMITTING DIODE - The object of the invention is to provide a light-emitting diode that is excellent in terms of thermal radiation properties and is capable of suppressing cracks in the substrate during joining and emitting light with high luminance by applying a high voltage, a light-emitting diode lamp, and a method of manufacturing a light-emitting diode. The above object is achieved by using a light-emitting diode ( | 12-08-2011 |
20110316020 | EPITAXIAL WAFER FOR LIGHT EMITTING DIODE - An epitaxial wafer for a light emitting diode, including a GaAs substrate, a light emitting unit provided on the GaAs substrate, and a strain adjustment layer provided on the light emitting unit, wherein the light emitting unit has a strained light emitting layer having a composition formula of (Al | 12-29-2011 |
20120007114 | LIGHT EMITTING DIODE, LIGHT EMITTING DIODE LAMP AND ILLUMINATING DEVICE - A light emitting diode including a compound semiconductor layer having at least a pn junction-type light emitting unit and a strain adjustment layer stacked on the light emitting unit, wherein the light emitting unit has a stacked structure containing a strained light emitting layer having a composition formula of (Al | 01-12-2012 |
20120199873 | METAL SUBSTRATE FOR LIGHT-EMITTING DIODE, LIGHT-EMITTING DIODE, AND METHOD FOR MANUFACTURING LIGHT-EMITTING DIODE - The object of the present invention is to provide a metal substrate for a light-emitting diode having excellent chemical resistance, a light-emitting diode, and a method for manufacturing the light-emitting diode, and the present invention provides a metal substrate for a light-emitting diode including a metal substrate, a compound semiconductor layer having a light-emitting portion, which is joined over the metal substrate via a junction layer, wherein the metal substrate for a light-emitting diode includes a metal plate and a metal protective film which covers at least an upper surface and a lower surface of the metal plate. | 08-09-2012 |
20130092901 | EPITAXIAL WAFER FOR LIGHT-EMITTING DIODES - The present invention relates to an epitaxial wafer for a light-emitting diode wherein the peak emission wavelength is 655 nm or more, and it is possible to improve reliability. The epitaxial wafer for light-emitting diodes includes a GaAs substrate ( | 04-18-2013 |
20130112999 | LIGHT EMITTING DIODE AND LIGHT EMITTING DIODE LAMP - A light emitting diode is provided by the present invention which includes a pn junction-type light emitting unit having a light emitting layer ( | 05-09-2013 |
20130240936 | LIGHT-EMITTING DIODE AND LIGHT-EMITTING DIODE LAMP - The present invention relates to a light-emitting diode which has an emission wavelength of 655 nm or more, excellent monochromatic properties, high output, high luminance, high efficiency and fast response time, has such a characteristic that the intensity of light emitted from a light extraction surface and traveling in a direction perpendicular to the light extraction surface has high directivity, and can release heat to the outside with high efficiency; and a light-emitting diode lamp. The light-emitting diode includes a compound semiconductor layer ( | 09-19-2013 |
20140183588 | LIGHT-EMITTING DIODE AND METHOD OF MANUFACTURING SAME - Provided are a light-emitting diode which prevents degradation of reflectance and which enables high-luminosity light emission, and its manufacturing method. Such a light-emitting diode includes a substrate ( | 07-03-2014 |
20140327028 | LIGHT-EMITTING DIODE, METHOD FOR MANUFACTURING LIGHT-EMITTING DIODE, LIGHT-EMITTING DIODE LAMP AND ILLUMINATION DEVICE - A light-emitting diode, a method of manufacturing the same, a lamp and an illumination device. A light-emitting diode ( | 11-06-2014 |
Patent application number | Description | Published |
20090001408 | Method for forming a semiconductor light-emitting device and a semiconductor light-emitting device - A semiconductor light-emitting device with a new layer structure is disclosed, where the current leaking path is not caused to enhance the current injection efficiency within the active layer. The device provides a mesa structure containing active layer and a p-type lower cladding layer on a p-type substrate and a burying layer doped with iron (Fe) to bury the mesa structure, where the burying layer shows a semi-insulating characteristic. The device also provides an n-type blocking layer arranged so as to cover at least a portion of the p-type buffer lower within the mesa structure. The n-type blocking layer prevents the current leaking from the burying layer to the p-type buffer layer, and the semi-insulating burying layer that covers the rest portion of the mesa structure not covered by the n-type blocking layer prevents the current leaking from the n-type blocking layer to the n-type cladding layer within the mesa structure. | 01-01-2009 |
20090086779 | SEMICONDUCTOR LASER DIODE WITH REDUCED PARASITIC CAPACITANCE - The LD of the invention provides a semiconductor stack including the current confinement region with the active mesa and the semi-insulating burying regions putting the active mesa therebeteen and the conductive region in contiguity with the current confinement region. The current confinement region and the conductive region are provided on epitaxially grown cladding layer. Two semiconductor regions, which are physically isolated to each other and each includes the semiconductor substrate, are provided on the semiconductor stack. One of regions comes in contact with one of burying regions and the active mesa, while, the other semiconductor regions comes in contact with the other of burying regions and the conductive region. | 04-02-2009 |
20090147845 | IMAGE CODING METHOD AND APPARATUS - An image coding method includes setting an input parameter indicating a coding control scheme and a color conversion scheme, the coding control scheme including at least one of an adaptive quantization scheme, a coding mode decision scheme and a motion detection scheme, and the color conversion scheme indicating a color conversion based on a variation of a level of a coding parameter changing based on the coding control scheme, analyzing an input image based on the coding control scheme to compute the coding parameter, processing the input image by color conversion based on the color conversion scheme and the coding parameter, selecting one of a preview mode and a non-preview mode based on a user instruction, and coding the input image in the non-preview mode and coding a processed image in the preview mode based on the coding control scheme of the input parameter and the coding parameter. | 06-11-2009 |
20090185620 | VIDEO ENCODING APPARATUS AND METHOD FOR THE SAME - A video encoding apparatus includes a calculator to calculate a bit rate every time interval of input encoded data from the number of encoded bits of each of a plurality of time intervals derived from the input encoded data by division in a decoding time direction, the input encoded data including variable bit rate encoded data encoded at a variable bit rate beforehand, a calculator to subtract the input bit rate from the first transmission bit rate to obtain a second transmission bit rate every time interval, and an encoder to encode video data according to the second transmission bit rate to output encoded data. | 07-23-2009 |
20100260256 | MOVING IMAGE COMPRESSION-CODING DEVICE, METHOD OF COMPRESSION-CODING MOVING IMAGE, AND H.264 MOVING IMAGE COMPRESSION-CODING DEVICE - A moving image compression-coding device has a pixel determination module configured to determine whether a color of each pixel in a macro block having a plurality of pixels in an input image is a predetermined color, a pixel counter configured to count a number of the pixels having the predetermined color in the macro block, a macro block determination module configured to determine whether a color of the macro block is considered to be the predetermined color according to the count result, and a compression-coded data generator configured to compression-code the input image with a compression ratio depending on the determination result. | 10-14-2010 |
20140159928 | DECODING APPARATUS, ENCODING APPARATUS, DECODING METHOD, AND ENCODING METHOD - According to an embodiment, a decoding apparatus includes a clipping unit and a decoding unit. The clipping unit is configured to clip pieces of encoded data each having a predetermined first code length from input data encoded with variable-length encoding. The predetermined first code length is greater than or equal to a maximum code length among a plurality of pieces of encoded data included in the input data. The decoding unit is configured to decode the clipped piece of encoded data by using variable-length decoding. | 06-12-2014 |
20140270554 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to an embodiment, an image encoding apparatus includes a parameter selector and an output selector. The parameter selector selects a coding parameter controlling the first encoder. The coding parameter makes a first code amount generated by the first encoder smaller than a target code amount if the coding parameter is applied to the first pixel group. The output selector selects the encoding result from the first encoder provided that the first code amount generated by the first encoder when the selected coding parameter is applied to the second pixel group is smaller than the second code amount generated by the second encoder. | 09-18-2014 |
20150023416 | IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE - According to an embodiment, an image encoding device assigns colors to pixels in a pixel block to encode an image. The device includes a generating unit to generate one or more provisional representative colors for pixels to be encoded and provisional indices for identifying the provisional representative colors based on colors assigned to encoded pixels; a updating unit to generate one or more determined representative colors to be used for expressing the pixels in the pixel block and indices for individually identifying the determined representative colors based on the pixels to be encoded and the provisional representative colors, and generate update information for updating the provisional representative colors and the provisional indices with the determined representative colors and the indices; an assigning unit to generate assignment information indicating the indices assigned to the pixels to be encoded; and an encoding unit to encode the update information and the assignment information. | 01-22-2015 |
Patent application number | Description | Published |
20090041122 | IMAGE CODING APPARATUS, IMAGE CODING METHOD AND IMAGE CODING PROGRAM - The image coding apparatus is provided to realize image coding with little calculation quantity and through rate distortion optimization thereby maintaining a favorable image quality. The image coding apparatus includes a processing unit that conducts frequency transform and quantization on a block in a predetermined manner for a plurality of coding modes, each mode having a different coding process, a cost calculating unit that calculates a predictive coded quantity and coding distortion in a coding mode using a result of the quantization conducted by the processing unit and a residue to obtain a cost regarding the coding mode, a minimum coding cost selecting unit that selects a minimum coding cost among the coding costs calculated for respective coding modes, and a coding unit that conducts coding on the blocks in a coding mode associated with the minimum coding cost selected by the minimum coding cost selecting unit. | 02-12-2009 |
20140147040 | IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD - According to an embodiment, an image encoding device includes a deciding unit, an assigning unit, and an encoding unit. The deciding unit is configured to determine representative colors for expressing each of pixel blocks into which image data are divided. The assigning unit is configured to assign an index for identifying the representative color to each pixel in the pixel block. The encoding unit is configured to encode indices and the representative colors, the indices and the representative colors in each pixel box being arranged alternately so that two representative colors are discontinuously encoded. | 05-29-2014 |
Patent application number | Description | Published |
20130188885 | APPARATUS AND METHOD FOR CODING IMAGE, AND NON-TRANSITORY COMPUTER READABLE MEDIUM THEREOF - According to one embodiment, a prediction unit generates a prediction block to be used for prediction of a coding target block, based on at least one reference block adjacent to the coding target block in the image. Each number of pixels in the coding target block and the prediction block is a power of two. A calculation unit calculates a residual block having residual pixel values between the coding target block and the prediction block. A decision unit decides whether to code the residual block, based on pixel values of at least one of the coding target block, the reference block and the prediction block. A coding unit codes the residual block by variable length coding, when the residual block is decided to be coded, and codes a skip flag representing the residual block not being coded when the residual block is not decided to be coded. | 07-25-2013 |
20140064612 | APPARATUS AND A METHOD FOR CODING AN IMAGE - According to one embodiment, an acquisition unit acquires a pixel block having a predetermined size from image data to be coded. A comparison unit calculates a distance between a color of a target pixel in the pixel block and each of a plurality of typical colors, and selects a typical color of which the distance is a minimum distance from the plurality of typical colors. A decision unit assigns a first index representing the selected typical color to the target pixel if the minimum distance is smaller than a first threshold, assigns a second index representing a new typical color to the target pixel if the minimum distance is larger than the first threshold, and adds the color of the target pixel as the new typical color when the second index is assigned. A coding unit codes the selected typical color, the new typical color, the first index and the second index. | 03-06-2014 |
20140270558 | IMAGE CODING APPARATUS AND IMAGE CODING METHOD - First coded data are generated from a target block by a first coding mode. Second coded data having predetermined amount are generated from the target block by a second coding mode. Whether to encode by the first coding mode or the second coding mode is decided. Based on the decision result, any of the first coded data and the second coded data is selected. If a total amount of coded data of a segment is over a target amount, encoding by the second coding mode is decided. The segment comprises blocks including the target block. The total amount is sum of an amount of coded data generated from blocks prior to the target block in the segment, an amount of the first coded data, an amount of coded data to be generated from remained blocks in the segment by the second coding mode. | 09-18-2014 |