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Hiroshi Kumai
Hiroshi Kumai, Koriyama-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20090128769 | COMPOUND, LIQUID CRYSTAL COMPOSITION, OPTICAL ANISOTROPIC MATERIAL AND OPTICAL DEVICE - A compound of the following formula (1): | 05-21-2009 |
| 20100038587 | BIFUNCTIONAL POLYMERIZABLE COMPOUND, LIQUID CRYSTAL COMPOSITION, OPTICAL ANISOTROPIC MATERIAL AND OPTICAL ELEMENT - A bifunctional polymerizable compound represented by the following formula: | 02-18-2010 |
| 20110063966 | COMPOUND, POLYMERIZABLE LIQUID CRYSTAL COMPOSITION, OPTICAL ELEMENT AND OPTICAL INFORMATION WRITING/READING DEVICE - A compound having a good durability against light and capable of producing desired liquid crystallinity after polymerization, and a polymerizable liquid crystal composition containing such a compound, are provided. Further, an optical element having a good durability against light, and an optical information writing/reading device employing such an element, are provided. | 03-17-2011 |
| 20110069241 | LIQUID CRYSTAL COMPOUND, POLYMERIZABLE LIQUID CRYSTAL COMPOSITION, OPTICALLY ANISOTROPIC MATERIAL, OPTICAL ELEMENT AND OPTICAL INFORMATION WRITING/READING DEVICE - A liquid crystal compound having a good durability against light, a polymerizable liquid crystal composition and an optically anisotropic material are provided. Further, an optical element having a good durability against light and an optical information writing/reading device employing such an element are provided. | 03-24-2011 |
| 20110089372 | OPTICALLY ANISOTROPIC MATERIAL, OPTICAL ELEMENT AND OPTICAL INFORMATION WRITING/READING DEVICE - An optically anisotropic material having a good durability against light is provided. Further, an optical element having a good durability against light and an optical information writing/reading device employing such an element are provided. | 04-21-2011 |
Hiroshi Kumai, Tokyo JP
| Patent application number | Description | Published |
|---|---|---|
| 20100149950 | LIQUID CRYSTAL OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE - To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. | 06-17-2010 |
| 20110037910 | LIQUID CRYSTAL OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE - To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. | 02-17-2011 |
Hiroshi Kumai, Saitama JP
| Patent application number | Description | Published |
|---|---|---|
| 20090202833 | Dialkoxymagnesium Granules and Method for their Synthesis - Dialkoxymagnesium granules having spherical or ellipsoidal particle shapes with a mean particle size, represented by D50, in the range of 60-200 μm, a bulk specific gravity of 0.2-0.7 g/ml, having numerous interior pores with pore sizes of 0.1-5 μm as observed with a TEM, and having a particle size distribution, represented by (D | 08-13-2009 |
Hiroshi Kumai, Fukushima JP
| Patent application number | Description | Published |
|---|---|---|
| 20120075539 | PROJECTION DISPLAY DEVICE - A projection display device is provided with: a light source portion including at least one light source that emits coherent light; an image light generation portion that generates image light by modulating the light emitted by the light source portion; a projection portion that projects the image light; a liquid crystal scattering element that is disposed on an optical path between the light source portion and the image light generation portion and temporally changes scattering state for passing light; a transparent electrode formed on each of opposing surfaces of a plurality of transparent substrates of the liquid crystal scattering element; and a liquid crystal layer that is sandwiched between the transparent electrodes and has liquid crystal of a smectic phase having spontaneous polarization in voltage applied state, and is characterized in that an AC voltage is applied to the liquid crystal layer through the transparent electrode. | 03-29-2012 |