Abstract: An optical switch for switching between transmission and total reflection of incident light 101 applied to electro-optical crystal 104 by applying an electric field to electro-optical crystal 104 to thereby change the refractive index of electro-optical crystal 104 includes a plurality of electrodes 105 disposed in electro-optical crystal 104 to provide electrode assembly 106 for applying the electric field to electro-optical crystal 104. Electro-optical crystal 104 has a refractive index changing portion (not shown) whose refractive index is changed by the electric field applied by electrode assembly 106, the refractive index changing portion enclosing electrode assembly 106 in its entirety. The refractive index changing portion has a flat refractive index boundary.

Abstract: An optical scanning device includes: a first scanning; a first scanning mirror driving unit; a light emission signal output unit; a light receiving unit; and a phase control unit which controls the first scanning mirror driving unit so as to delay a phase of the oscillation of the first scanning mirror when the light receiving unit outputs the detection signal before intermediate time in a case where the light receiving unit does not output the detection signal during a predetermined period of time, the phase control unit controlling the first scanning mirror driving unit so as to advance a phase of the oscillation of the first scanning mirror when the light receiving unit outputs the detection signal after the intermediate time in the case where the light receiving unit does not output the detection signal during the predetermined period of time.

Abstract: A semiconductor memory device is disclosed that includes an ODT circuit configured to be connected to a bus which transmits a data signal or a data strobe signal between a memory block and an input-output terminal; a first switch configured to be inserted into the bus between the memory block and the ODT circuit; a mode controller configured to switch off the first switch during a test of the memory block; and an oscillator configured to be connected to the ODT circuit, wherein a test signal is supplied to the ODT circuit from the oscillator during the test of the memory block.

Abstract: A computer system including: a memory configured to store various kinds of data; a use setting data memory means for storing use setting data indicating a use of each of a plurality of memory blocks into which the memory is divided by a certain length; a memory diagnosis means for diagnosing the memory so as to detect a bad area in each of the memory blocks; and a memory use setting means for setting the use setting data of each of the memory blocks stored in the use setting data memory means in accordance with a result of detecting the bad area in each of the memory blocks by means of the memory diagnosis means.

Abstract: In addition to reflective light modulation devices, reflective polarization plates, a color combining optical device, and support bodies, a projector is provided with connection members fixed to the color combining optical device and for supporting the support bodies. Support positions of the support body by the connection members are disposed on the opposite side to the disposition position of the reflective light modulation device with respect to a plane including a polarization split surface of the reflective polarization plate.

Abstract: A computer apparatus includes a first processor, a second processor, and a main memory. The computer apparatus further includes a memory-diagnostic unit, a diagnostic-program loading unit, and a defective-function identifying unit. The memory-diagnostic unit causes the second processor to execute a memory-diagnostic program to diagnose the main memory, and identifies a defective area in the main memory. The diagnostic-program loading unit loads a processor-diagnostic program for diagnosing a plurality of functions of the first processor into an area of the main memory other than the defective area identified by the memory-diagnostic unit. The defective-function identifying unit causes the second processor to execute the processor-diagnostic program loaded by the diagnostic-program loading unit, and identifies a defective function that is disabled from the functions of the first processor.

Abstract: A data processing apparatus includes a CPU including a register, a cache memory, a main memory configured to exchange data with the cache memory, a control part configured to control the exchanging of data between the main memory and the cache memory, and a power supply part configured to supply power to the register, the cache memory, and the main memory. The register, the cache memory, and the main memory are each configured to store data and maintain the stored data therein without being supplied with the power from the power supply part. The control part is configured to stop the CPU from accessing the register, the cache memory, and the main memory where an abnormality occurs in the power supply part.

Abstract: A manufacturing method of a projection apparatus includes forming a modulation device unit in which a reflective light modulation device and a reflective polarizer are fixed to predetermined relative positions, and adjusting a position of the reflective light modulation device relative to a projection optical device by shifting a position of the modulation device unit with respect to the projection optical device.

Abstract: A memory error detecting apparatus for detecting an error of a subject memory, the memory error detecting apparatus includes a memory bus connected to the subject memory, a mirror memory connected to the memory bus so as to receive the same data as data to be written into and read from the subject memory, the received data being written into the mirror memory, an address acquiring portion configured to acquire an address related to the data written into the subject memory, a mirror memory controller configured to control data writing or reading to or from the mirror memory on the basis of the acquired address, a comparator configured to compare data read from the subject memory and data read from the mirror memory, and an error detector configured to detect a data error on the basis of a result of the comparison.

Abstract: A projector having a first lens array with a plurality of first lenses in a plane substantially orthogonal to an optical axis of the light beam from a light source that divides the light beam into a plurality of partial light beams, a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and a polarization converter that is disposed on a light beam emitting-side of the first lens array. A focal position in a first direction of the first lens is set in the vicinity of the second lens array in the optical direction of the light beam irradiated from the first lens. A focal position in the second direction of the first lens is set in the vicinity of the polarization converter in the optical direction of the light beam irradiated from the first lens.

Abstract: An optical switch changes the refractive index of an electro-optical crystal according to an electric field applied to the electro-optical crystal so as to switch depending on whether the electro-optical crystal enables incident light to pass through or whether the electro-optical crystal enables incident light to be totally reflected. The optical switch includes an electrode section including a plurality of electrodes and formed in the electro-optical crystal, a principal plane including the largest area of each electrode on a same plane of the electro-optical crystal; an insulator layer on at least one plane of the electro-optical crystal, the plane being parallel with the electrode section, the insulator layer made of an insulator with lower dielectric constant than the electro-optical crystal; and a temperature control device formed on and in contact with the insulator layer and controls a temperature of the electrode section or dissipates heat generated in the electrode section.

Abstract: An optical switch includes electro-optic crystal, and electrode unit including a plurality of electrodes arranged on the same plane in electro-optic crystal to extend in parallel to one another. A refractive index of a part of electro-optic crystal is changed by an electric field generated at electrode unit, thereby switching transmission and reflection of light incident on electro-optic crystal. Electro-optic crystal has an entrance surface through which light enters and an exit surface from which light exits. Electrode unit is located between the entrance surface and the exit surface. An angle ?x formed between a longitudinal direction of electrodes and at least one surface from among the entrance surface and the exit surface is set near an angle that satisfies the expression ?x=90°?Sin?1[cos(Tan(n))] in a wavelength of light to be modulated.

Abstract: A memory device that can include a power-supply voltage detector that detects power-supply voltage values and that outputs a detection result indicating which power-supply voltage value is detected; a data-rate setter that sets data rates corresponding to the detection result of the power-supply voltage detector, in synchronization with a rising edge or falling edge of a clock signal; and a memory cell array that performs reading/writing at the data rates set by the data-rate setter.

Abstract: A projector having a first lens array with a plurality of first lenses in a plane substantially orthogonal to an optical axis of the light beam from a light source that divides the light beam into a plurality of partial light beams, a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and a polarization converter that is disposed on a light beam emitting-side of the first lens array. A focal position in a first direction of the first lens is set in the vicinity of the second lens array in the optical direction of the light beam irradiated from the first lens. A focal position in the second direction of the first lens is set in the vicinity of the polarization converter in the optical direction of the light beam irradiated from the first lens.

Abstract: The present invention provides an optical scanning device that prevents a disadvantageous increase in device size. Transfer optical system 17 includes at least concave mirrors 19 and 20. Furthermore, transfer optical system 17 allows a light beam scanned by scan mirror 16 to enter the scan mirror again at least via concave mirrors 19 and 20. Then, scan mirror 16 scans and emits the laser light beam received via concave mirrors 19 and 20, to a plane of projection.

Abstract: A data transmission system includes a transmitter including a drive unit outputting complementary signals to first and second transmission lines according to data for transmission, and a receptor including first and second termination resistors, and a receiver circuit. One ends of the first and second termination resistors are respectively connected to first and second nodes that are connected to first and second transmission lines and other ends of the first and second termination resistors are connected in common to a third node. The receiver circuit supplies a current to the third node and outputs received data corresponding to data for transmission, in accordance with a potential difference between the first and second nodes.

Abstract: A projector having a first lens array with a plurality of first lenses in a plane substantially orthogonal to an optical axis of the light beam from a light source that divides the light beam into a plurality of partial light beams, a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and a polarization converter that is disposed on a light beam emitting-side of the first lens array. A focal position in a first direction of the first lens is set in the vicinity of the second lens array in the optical direction of the light beam irradiated from the first lens. A focal position in the second direction of the first lens is set in the vicinity of the polarization converter in the optical direction of the light beam irradiated from the first lens.

Abstract: A current output type digital-analog conversion circuit which outputs a current signal includes a decoder for decoding higher-order bits of input digital data, a plurality of binary current generators, and a current adder. Each of the binary current generators includes a device for outputting a binary current which increases linearly as binary values according to lower-order bits of the input digital data, and a device for outputting a predetermined all-ON current. Either the device for outputting the binary current or the element for outputting the all-ON current of the binary current generator is selected according to a decode signal output by the decoder. The current adder adds up and outputs the binary currents and the all-ON currents output by the plurality of binary current generators.

Abstract: A memory system includes a first memory that is used as a main memory of a target device, a second memory that has an access speed lower than that of the first memory, a securing section that secures a predetermined area of the first memory as a temporary storage area of the second memory, and a memory control section that receives an instruction to write data into the second memory, temporarily stores the data into the first memory and also transfers the stored data from the first memory to the second memory.

Abstract: A transmission device displays a public image (a first image) provided to unspecified users, a private image (a second image) provided to particular users, and a mask image of the private image in a time division multiplexed manner, and transmits a private image sync signal synchronized with display of the private image. A reception device receives the private image sync signal transmitted from the transmission device and shoots by a shooting unit the private image displayed on the transmission device by using the private image sync signal, and displays the shot image on a display unit.