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Azakami
Hiroshi Azakami, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20100013570 | WAVEFORM EQUALIZER - Tap coefficients of an FIR filter are prevented from converging to wrong values. A waveform equalizer for performing waveform equalization of an input signal and outputting a waveform equalization result as an output signal includes: an FIR filter for performing a convolution operation between the input signal and a plurality of tap coefficients; an IIR filter for performing a convolution operation between the output signal and a plurality of tap coefficients; an adding section for adding an operation result of the FIR filter and an operation result of the IIR filter and outputting an addition result as the output signal; an error detecting section for detecting an error of the output signal; and a tap coefficient updating section for updating respective tap coefficients of the FIR filter and the IIR filter based on the error. The tap coefficient updating section sets a step size for updating the tap coefficients of the FIR filter to a value smaller than a step size for updating the tap coefficients of the IIR filter during a period from start of operation of the waveform equalizer until a predetermined condition is satisfied. | 01-21-2010 |
Minoru Azakami, Tokyo-To JP
| Patent application number | Description | Published |
|---|---|---|
| 20080316556 | VOLUME HOLOGRAM TRANSFER FOIL, VOLUME HOLOGRAM LAMINATE, AND PRODUCTION METHOD THEREOF - A major object of the present invention is to provide a volume hologram transfer foil that gives a volume hologram laminate higher in antiforgery function, | 12-25-2008 |
| 20100104952 | METHOD OF PRODUCING VOLUME HOLOGRAM LAMINATE - A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound. | 04-29-2010 |
Minoru Azakami, Chiba-Ken JP
| Patent application number | Description | Published |
|---|---|---|
| 20090059158 | OPTICAL DIFFUSION DEVICE, PROJECTION SCREEN, DESIGN MEMBER AND SECURITY MEDIUM - The present invention provides an optical diffusion device, which can exhibit discontinuously different optical properties only in desired regions without creating any difference in grades and/or breaks, facilitate control of the optical diffusion properties, and prevent the occurrence of the stray light, as well as provides a projection screen and a design member, both using the optical diffusion device. An exemplary optical diffusion device according to this invention includes a base, and a cholesteric liquid crystal polymer layer provided on the base and composed of a plurality of diffusion regions arranged on a plane. A diffusion angle of one of the diffusion regions (e.g., first diffusion regions) of the cholesteric liquid crystal polymer layer is different from a diffusion angle of another of the diffusion regions (e.g., second diffusion regions). | 03-05-2009 |