Abstract: A semiconductor device capable of charging that is less likely to cause deterioration of a power storage device is provided. The amount of a charging current is adjusted in accordance with the ambient temperature. Charging under low-temperature environments is performed with a reduced charging current. When the ambient temperature is too low or too high, the charging is stopped. Measurement of the ambient temperature is performed with a memory element using an oxide semiconductor. The use of a memory element using an oxide semiconductor enables measurement of the ambient temperature and retention of the temperature information to be performed at the same time.

Abstract: A high-resolution display device in which delay of input signals to pixels is reduced is provided. In the display device, a first layer, a second layer, and a third layer are formed in this order from the bottom. The first layer includes a driver circuit and a plurality of first wirings, the second layer includes a plurality of first contact portions, and the third layer includes a pixel array and a plurality of second wirings. The pixel array includes a plurality of pixel circuits. The plurality of second wirings are parallel to each other and extended in the column direction of the pixel array, and the plurality of pixel circuits are electrically connected to the plurality of second wirings. The driver circuit includes a plurality of output terminals positioned along a first direction. The plurality of first wirings are extended perpendicular to the first direction, and the plurality of output terminals are electrically connected to the plurality of first wirings.

Abstract: A battery protection circuit with a novel configuration and a power storage device including the battery protection circuit are provided. The battery protection circuit includes a switch circuit for controlling charge and discharge of a battery cell; the switch circuit includes a mechanical relay, a first transistor, and a second transistor; the switch circuit has a function of controlling electrical connection between a first terminal and a second terminal; the mechanical relay has a function of breaking electrical connection between the first terminal and the second terminal; the first transistor has a function of supplying first current between the first terminal and the second terminal; the second transistor has a function of supplying second current between the first terminal and the second terminal; and the first current is higher than the second current.

Abstract: A fingerprint input apparatus for providing a plurality of inputs while moving a finger to acquire a fingerprint image, the fingerprint input apparatus determining an intersection of the plurality of input partial fingerprint images to calculate a relative location between the plurality of partial fingerprint images on the basis of the intersection and outputting the calculated relative location with the plurality of partial fingerprint images to an external device. The intersection of the plurality of partial fingerprint images is obtained, for example, on the basis of a density distribution of dots constituting each of the image. The relative location is at least one of the moving direction, the moving distance, and the angle of rotation. Thereby, there is no movable part and thus it eliminates a need for providing the external device with software processing for calculating the relative location of the partial fingerprint images, thereby achieving downsizing and power saving of the apparatus.

Abstract: This invention provides a fingerprint input apparatus which detects that a finger is put on a sensor element, which can reduce power consumption, which requires fewer components, and which is simple in configuration. In a fingerprint input apparatus which includes a sensor element for reading a fingerprint and a switch for detecting that a finger is put on the sensor element, which is activated by an operation of the switch the switch is a push switch, the sensor element and the switch are fixed to a housing, and the switch is arranged on an opposite surface to a surface on which the sensor element is arranged, across the housing. The switch may be a pressure sensitive switch instead of a push switch, and the apparatus may further include a unit for notifying a user whether it is appropriate to apply a depression pressure.

Abstract: In construction processing of a fingerprint partial image, distortion occurs in the general image due to accumulation of coordinate errors at image joining positions. While a latest partial image read by a sweep type fingerprint sensor is being displaced relative to an already acquired partial image, a displacement quantity at each displacement position is found. By interpolation computation using the found values, a first vector component indicating a movement quantity of the latest partial image in the slide direction, and first and second candidates for a second vector component indicating a movement quantity in a direction perpendicular to the slide direction are calculated as values each having a resolution higher than the pixel pitch. The latest partial image is disposed so as to be joined to the already acquired partial image on the basis of a movement quantity vector including the first and second vector components.

Abstract: When slide operation of a finger on a sweep type fingerprint sensor is not constant, it is difficult to construct a general image of a fingerprint. An inspection region, which is used to find a difference between a latest partial image read by a sweep type fingerprint sensor and an already acquired partial image, is set in the already acquired partial image along a displacement direction of a plurality of consecutive already acquired partial images. A retrieval range for a position of superposition of the latest partial image on the already acquired partial image is set on the basis of a position of the inspection region. Displacement of the latest partial image with respect to the already acquired partial image is caused in the retrieval range and a difference between the already acquired partial image and the latest partial image concerning the inspection region is found every displacement.

Abstract: When slide operation of a finger on a sweep type fingerprint sensor is not constant, it is difficult to construct a general image of a fingerprint. An inspection region, which is used to find a difference between a latest partial image read by a sweep type fingerprint sensor and an already acquired partial image, is set in the already acquired partial image along a displacement direction of a plurality of consecutive already acquired partial images. A retrieval range for a position of superposition of the latest partial image on the already acquired partial image is set on the basis of a position of the inspection region. Displacement of the latest partial image with respect to the already acquired partial image is caused in the retrieval range and a difference between the already acquired partial image and the latest partial image concerning the inspection region is found every displacement.

Abstract: In construction processing of a fingerprint partial image, distortion occurs in the general image due to accumulation of coordinate errors at image joining positions. While a latest partial image read by a sweep type fingerprint sensor is being displaced relative to an already acquired partial image, a displacement quantity at each displacement position is found. By interpolation computation using the found values, a first vector component indicating a movement quantity of the latest partial image in the slide direction, and first and second candidates for a second vector component indicating a movement quantity in a direction perpendicular to the slide direction are calculated as values each having a resolution higher than the pixel pitch. The latest partial image is disposed so as to be joined to the already acquired partial image on the basis of a movement quantity vector including the first and second vector components.

Abstract: A fingerprint input apparatus for providing a plurality of inputs while moving a finger to acquire a fingerprint image, the fingerprint input apparatus determining an intersection of the plurality of input partial fingerprint images to calculate a relative location between the plurality of partial fingerprint images on the basis of the intersection and outputting the calculated relative location with the plurality of partial fingerprint images to an external device. The intersection of the plurality of partial fingerprint images is obtained, for example, on the basis of a density distribution of dots constituting each of the image. The relative location is at least one of the moving direction, the moving distance, and the angle of rotation. Thereby, there is no movable part and thus it eliminates a need for providing the external device with software processing for calculating the relative location of the partial fingerprint images, thereby achieving downsizing and power saving of the apparatus.

Abstract: This invention provides a fingerprint input apparatus which detects that a finger is put on a sensor element, which can reduce power consumption, which requires fewer components, and which is simple in configuration. In a fingerprint input apparatus which includes a sensor element for reading a fingerprint and a switch for detecting that a finger is put on the sensor element, which is activated by an operation of the switch the switch is a push switch, the sensor element and the switch are fixed to a housing, and the switch is arranged on an opposite surface to a surface on which the sensor element is arranged, across the housing. The switch may be a pressure sensitive switch instead of a push switch, and the apparatus may further include a unit for notifying a user whether it is appropriate to apply a depression pressure.

Abstract: There is provided a liquid crystal display device including (a) a pixel electrode, (b) a first signal line extending along one side of the pixel electrode, and (c) a second signal line extending along the other side of the pixel electrode. A first length along which the pixel electrode and the first signal line are adjacent to each other is equal to a second length along which the pixel electrode and the second signal line are adjacent to each other, a first space between the pixel electrode and the first signal line is equal to a second space between the pixel electrode and the second signal line. The liquid crystal display device makes it possible to minimize imbalance in parasitic capacitances to be generated between the pixel electrode and the first and second signal lines.

Abstract: According to an aspect of the present invention, there is provided a liquid crystal display device of a delta type pixel arrangement, which comprises: a plurality of scan lines formed on a substrate and extending in a horizontal direction; a plurality of signal lines each intersecting with each of the plurality of scan lines substantially at right angles at a intersection region; a plurality of thin film transistors each having a drain electrode and a source electrode arranged at the intersection region in a direction substantially having right angles with each of the plurality of scan lines; and a plurality of pixel electrodes arranged in a matrix formed of regions divided out by the plurality of scan lines and the plurality of signal lines, wherein a part in a portion disposed between adjoining two of the plurality of scan lines and taken from each of the plurality of signal lines is arranged in a direction having a oblique angle with each of the plurality of scan lines.

Abstract: A nonflammable injection-molding resin composition. The composition includes a nonflammable resin component containing a low-molecular-weight styrene resin having a high .alpha.-methylstyrene content; a rubbery polymer having grafted thereon a vinyl cyanide and/or alkyl (meth)acrylate monomer and an aromatic vinyl monomer; a low-molecular weight post-chlorinated polyvinyl chloride resin and, optionally, a vinyl chloride resin; and, as a moldability-improving agent, a specific alkyl acrylate resin comprising a vinyl cyanide monomer, an alkyl acrylate monomer and an optional copolymerizable vinyl monomer. The nonflammable resin composition provides injection-molded articles with a good balance of impact strength and non-peeling properly and is excellent in moldability.