Abstract:
According to an embodiment, a semiconductor device includes a wireless station selection unit configured to select a connection destination wireless station from among a plurality of wireless stations. The wireless station selection unit includes a power calculation processing unit, a storage unit, a table update processing unit, and a power variation range detection processing unit. The power calculation processing unit is configured to calculate power of each receiving signal from each of the wireless stations. The storage unit is configured to store a table, and the power of each receiving signal equal to or more than a predetermined threshold is recorded in the table in association with each of the wireless stations. The table update processing unit is configured to update the table at a predetermined timing interval. The power variation range detection processing unit is configured to detect a variation range of the power for each of the wireless stations with reference to the table and configured to set the wireless station in which the variation range is within a predetermined range as a priority candidate of the connection destination wireless station.
Abstract:
A lithium secondary battery having enhanced safety, which includes an electrode group, a non-aqueous electrolyte and a battery can for housing them. The electrode group includes: a positive electrode having a strip-shaped positive electrode current collector and a material mixture layer carried thereon; a negative electrode having a strip-shaped negative electrode current collector and a material mixture layer carried thereon; a separator; and a porous heat resistant layer. The positive and negative electrodes are spirally wound with the separator and the porous heat resistant layer interposed therebetween. An outermost surface of the electrode group includes an exposed portion of either of the positive and negative electrode current collectors. The exposed portion faces an inner surface of the battery can with the separator interposed therebetween, and has opposite polarity to that of the battery can.
Abstract:
Provided is a method for negative electrode active material evaluation useful for steady production of batteries having a prescribed performance level. This evaluation method comprises: (A) running microscopic Raman analysis at a wavelength of 532 nm n times on a sample of a composite carbon comprising a low-crystalline carbon material at least partially on surfaces of particles of a high-crystalline carbonaceous substance (wherein n is 20 or more); (B) with respect to a Raman spectrum obtained in each microscopic Raman analysis run, determining the ratio of its D-band intensity ID to its G-band intensity IG, R (ID/IG); (C) determining the number of analysis runs, m, where the R value was 0.2 or greater, and (D) determining the ratio of m to n, the total number of analysis runs.
Abstract:
As a negative electrode active material that enables steady production of batteries with excellent low-temperature performance, provided is a composite carbon comprising a low-crystalline carbon material at least partially on surfaces of particles of a high-crystalline carbonaceous substance. The negative electrode active material has a tapped density of 0.9 g/cm3 or smaller and a distribution of R values equal to or rater than 0.2, D2, of 20% or greater. Here, the R value is a ratio of the D-band intensity ID to the G-band intensity IG, ID/IG, in a 532 nm wavelength Raman spectrum of the negative active material. When a sample of the negative electrode active material is subjected to n (n≧20) times of microscopic Raman analysis at a wavelength of 532 nm and m is the number of times where the R value in the resulting Raman spectrum is equal to or greater than 0.2, the DR≧0.2 is a percentage of m to n.
Abstract:
A back light unit includes a light guide plate having a rectangle shape with first and second edges and a light source having a light element to emit light to a first edge of the light guide plate. The light guide plate emits the incident light from the light source to a liquid crystal display panel as a flat light source. An elastic frame is integrally formed with first and second frame elements in a rectangle shape so as to surround the light guide plate. The light source includes a metal frame clipped by a clip shape implemented provided in the first frame element. The first edge facing the second edge of the light guide plate is fitted to the metal frame. The second edge of the light guide plate is fitted to a second frame element having a clip portion for clipping the light guide plate.
Abstract:
The lithium secondary battery obtained by the present invention is a lithium secondary battery provided with a nonaqueous electrolyte and electrode body 80 having a positive electrode and a negative electrode, wherein a positive electrode 10 has a structure having a positive electrode active material layer 14 which contains a positive electrode active material 16, and which is supported on a positive electrode collector 12, the total pore volume within the positive electrode active material layer 14 is within a range of 0.13 cm3/g to 0.15 cm3/g, and 75% or more of the total pore volume is formed of pores 18 with a diameter of 0.3 μm or less.
Abstract:
A lithium secondary battery having enhanced safety, which includes an electrode group, a non-aqueous electrolyte and a battery can for housing them. The electrode group includes: a positive electrode having a strip-shaped positive electrode current collector and a material mixture layer carried thereon; a negative electrode having a strip-shaped negative electrode current collector and a material mixture layer carried thereon; a separator; and a porous heat resistant layer. The positive and negative electrodes are spirally wound with the separator and the porous heat resistant layer interposed therebetween. An outermost surface of the electrode group includes an exposed portion of either of the positive and negative electrode current collectors. The exposed portion faces an inner surface of the battery can with the separator interposed therebetween, and has opposite polarity to that of the battery can.
Abstract:
According to an embodiment, a semiconductor device includes a wireless station selection unit configured to select a connection destination wireless station from among a plurality of wireless stations. The wireless station selection unit includes a power calculation processing unit, a storage unit, a table update processing unit, and a power variation range detection processing unit. The power calculation processing unit is configured to calculate power of each receiving signal from each of the wireless stations. The storage unit is configured to store a table, and the power of each receiving signal equal to or more than a predetermined threshold is recorded in the table in association with each of the wireless stations. The table update processing unit is configured to update the table at a predetermined timing interval. The power variation range detection processing unit is configured to detect a variation range of the power for each of the wireless stations with reference to the table and configured to set the wireless station in which the variation range is within a predetermined range as a priority candidate of the connection destination wireless station.
Abstract:
A non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte; and a porous insulating film adhered to a surface of at least one selected from the group consisting of the positive electrode and the negative electrode, the porous insulating film including an inorganic oxide filler and a film binder, wherein the ratio R of actual volume to apparent volume of the separator is not less than 0.4 and not greater than 0.7, and wherein the ratio R and a porosity P of the porous insulating film satisfy the relational formula: −0.10≦R−P≦0.30.
Abstract:
A liquid crystal display device includes an area light source unit which is opposed to one of polarizer. The area light source unit includes a light guide having a light incidence surface opposed to a cold cathode tube, a light emission surface which emits light that is incident on the light incidence surface, and an opposed surface which is opposed to the light emission surface, and a prismatic sheet disposed between the polarizer plate and the light guide. The light guide has prisms on at least the opposed surface. The prismatic sheet has prisms which extend in a direction that is displaced counterclockwise by a first predetermined angle from a direction that is perpendicular to a direction of extension of the prisms. An angle between a polarization axis of the polarizer plate and a polarization axis of the prismatic sheet is set at a second predetermined angle.