392results about How to "Suppress crosstalk" patented technology

In a polarization maintaining multi-core optical fiber according to the present invention, structural birefringence is generated since an elliptic core is applied. In addition, each core is arranged so that a direction of a line connecting between centers of the nearest cores and a long axis direction of a field distribution in each core may be different from each other, and thereby, overlap of field distributions between the nearest cores is reduced. As a result, a crosstalk among cores is reduced.

An image pickup device including a semiconductor substrate that is irradiated with light from a first surface side thereof, and reading signal charges generated in the semiconductor substrate in accordance with the light from a second surface side thereof, wherein the semiconductor substrate includes: a photoelectric converting layer that includes a plurality of impurity diffusion layers on the second surface side of the semiconductor substrate, and that produces the signal charges by photoelectric conversion; and an embedded member that includes a light blocking material, and that is embedded in an impurity diffusion layer on a surface side of the photoelectric converting layer, the surface side facing the second surface side of the semiconductor substrate.

A photodetector having a mechanism of suppressing light crosstalk includes a plurality of photodiodes disposed on a common semiconductor substrate, each photodiode including an absorption layer epitaxially grown on the common semiconductor substrate and being provided with an epitaxial-side electrode. Each photodiode is provided with at least one of a ring-shaped or crescent-shaped epitaxial-side electrode, an incident-side-limited condensing part which condenses incident light that is directed to the corresponding photodiode only, and emission means which is disposed on a side opposite to a light-incident side of the absorption layer and which allows light entering from the light-incident side to be easily emitted out of the photodiode.

The invention discloses a short wave/medium wave/long wave infrared detector based on InAs/GaSb class II-type superlattice materials. The detector comprises a GaSb substrate, an epitaxial structure deposited on the GaSb substrate, a passivation layer and a metal electrode, wherein the epitaxial structure sequentially comprises a GaSb buffering layer, an n-type InAs/GaSb superlattice contact layer, a first M-type InAs/GaSb/AlSb/GaSb/InAs superlattice hole blocking layer, a p-type InAs/GaSb superlattice long wave infrared absorbing layer, a first p-type InAs/GaSb superlattice contact layer, a p-type InAs/GaSb superlattice medium wave infrared absorbing layer, a second M-type InAs/GaSb/AlSb/GaSb/InAs superlattice hole blocking layer, a p-type InAs/GaSb superlattice short wave infrared absorbing layer, a second p-type InAs/GaSb superlattice contact layer and a cover layer. The detector is of a pMp-p-pi-M-n heterostructure and has the advantages of being low in crosstalk, low in dark current and high in detection rate.

In a waveguide device, unnecessary optical power is appropriately terminated. According to an embodiment of the present invention, the waveguide device has a termination structure filled with a light blocking material to terminate light from a waveguide end. In the termination structure, a cladding and a core are removed to form a groove on an optical waveguide. The groove is filled with a material (light blocking material) that attenuates the intensity of light. Thus, light input to the termination structure is attenuated by the light blocking material, suppressing crosstalk which possibly effects on other optical devices. Thus, such a termination structure can restrain crosstalk occurred in optical devices integrated in the same substrate and can also suppress crosstalk which possibly effects on any other optical device connected directly to the substrate.

In the case of a method and a measuring system for measuring the distortion of an optical imaging system with the aid of moiré patterns, an object grating with an object pattern is arranged in the object plane of the imaging system, and an image grating with an image pattern is arranged in the image plane of the imaging system. Both the object pattern and the image pattern in each case have a multiplicity of cells with sub-gratings of different grating properties, it being possible, in particular, for the sub-gratings to have different directions of periodicity and different phase angles. The object pattern and the image pattern are coordinated with one another in such a way that, when the object pattern is projected onto the image pattern with the aid of the imaging system, images of the sub-gratings of the object pattern superimpose in each case with assigned sub-gratings of the image pattern, accompanied by the generation of moiré sub-patterns, which are likewise present in the form of cells situated next to one another. As a result, it is possible simultaneously to determine distortion components for a plurality of image directions aligned transverse to one another. It is preferred to use phase-shift methods in order to evaluate the moiré sub-pattern.

An object is to provide a driving method of a liquid crystal display device with a low power consumption and a high image quality. A pixel includes a liquid crystal element and a transistor which controls supply of an image signal to the liquid crystal element. The transistor includes, in a channel formation region, a semiconductor which has a wider band gap than a silicon semiconductor and has a lower intrinsic carrier density than silicon, and has an extremely low off-state current. In inversion driving of pixels, image signals having opposite polarities are input to a pair of signal lines between which a pixel electrode is disposed. By employing such a structure, the quality of the displayed image can be increased even in the absence of a capacitor in the pixel.

The present invention relates to a multicore optical fiber having a structure for effectively inhibiting polarization mode dispersion from increasing, and the multicore optical fiber comprises a plurality of multicore units and a cladding region integrally covering the plurality of multicore units while separating the multicore units from each other. Each of the plurality of multicore units includes a plurality of core regions arranged such as to construct a predetermined core arrangement structure on a cross section orthogonal to an axis. The core arrangement structure of each multicore unit on the cross section has such a rotational symmetry as to coincide with the unrotated core arrangement structure at least three times while rotating by 360° about a center of the multicore unit, thereby reducing the structural asymmetry of each multicore unit. This lowers the structural birefringence in each multicore unit, thereby inhibiting the polarization mode dispersion from increasing in the multicore optical fiber.

A planar nanospectrometer formed as a single chip that uses diffraction structures, which are combinations of numerous nano-features placed in a predetermined configuration and providing multiple functionalities such as guiding light, resonantly reflecting light at multiple wavelengths, directing light to detectors, and focusing light on the detectors. The diffraction structure can be described as a digital planar hologram that comprises an optimized combination of overlaid virtual sub-gratings, each of which is resonant to a single wavelength of light. Each device includes at least one sensor, at least one light source, and at least one digital planar hologram in an optical waveguide. The device of the present invention allows detection of small amounts of analytes in gases and liquids or on solid surfaces and can be particularly advantageous for field analysis of environmental safety in multiple locations because of its miniature size and low cost.

An object of the present invention is to enable suppression of a leak current of an organic EL element while improving a conductivity of the organic EL element and suppressing an operation voltage thereof. An organic EL element is used which comprises at least a luminescent layer, a hole transport layer adjacent to a positive-electrode side of the luminescent layer, and an electron injection transport layer adjacent to a negative-electrode side of the luminescent layer, wherein a hole injection layer is provided between the hole transport layer and the positive electrode, and the conductivity of the hole injection layer continuously changes along a thickness direction of the hole injection layer.

The invention provides a liquid spray head and an ink-jet recording device using the liquid spray head, which can make the required energy (vibration) for spraying not attenuate and thus reduce the crosstalk. The liquid spray head comprises a plurality of injectors. Each injector comprises a nozzle for spraying liquid drops; a pressure chamber which is equipped corresponding to the nozzle; and an energy generating element for exerting spraying force on the liquids inside the pressure chamber. Inside the liquid spray head, there is a common flow path which supplies liquids to a plurality of pressure chambers; a throttling part equipped on the independent flow path parts where each pressure chamber is connected with the common flow path; and air opening holes communicated with the common flow path and having an opening on the nozzle face. The flow path vibration can be absorbed by the bent liquid levels inside the air opening holes. If the inertia of the nozzle, the inertia of the throttling part and that of the air opening holes are respectively set as La, Lb, and Lc, preferably Lb is more than La and Lb is also more than Lc.

A display device includes: a panel portion, on which a plurality of sub-pixels with a discrete bus line form each individual pixel, the plurality of sub-pixels that form the individual pixel being sequentially arranged in a horizontal and a vertical direction, the panel portion displaying a two-dimensional image or a three-dimensional image by application of a signal via the bus line; and a filter portion, provided on a front surface of the panel portion, that alternately changes, for each of predetermined horizontal regions, a polarization state of light passing through the panel portion. A boundary of each of the horizontal regions of the filter portion is positioned within a range of a first sub-pixel of each of the plurality of sub-pixels. The first sub-pixel displays a different image when the two-dimensional image is displayed on the panel portion to when the three-dimensional image is displayed on the panel portion.

The invention discloses a wireless signal detection and electromagnetic interference classification system and method based on deep learning. The method comprises the steps of obtaining the observation data by using the frequency spectrum monitoring nodes deployed in a distributed manner; executing two types of signal feature mining in parallel based on the complex value observation data to obtaina wireless signal detection data set and an electromagnetic interference classification data set, training two groups of convolutional neural networks in parallel based on the two types of data sets,and then detecting wireless signals and executing electromagnetic interference classification by using the two groups of trained convolutional neural networks respectively. The system and the methodhave the beneficial effects that the accuracy of the wireless signal detection and the electromagnetic interference classification can be improved; the generalization singular value decomposition andthe space division are performed on two types of data sets, so that the additive noise can be eliminated, the crosstalk from adjacent channels can be inhibited, and the authenticity of data can be enhanced; and the wireless signal detection and the electromagnetic interference classification are carried out concurrently, so that the efficiency is high, and the response is fast.

Embodiment of the invention provides a wavelength selection switch, which suppresses crosstalk by adjusting the polarity of the optical signal based on the structure of the covnentional 1 * N wavelength selection switch, so that the input optical signals of different paths have different polarities when being incident on a switch engine, and crosstalk between the different paths of light can be suppressed by filtering the polarity for the light signal reflected by the switching engine. The inhibition of crosstalk interference in the M * N ( N input optical fiber ports, M output optical fiber ports; or M input optical fiber ports, N output optical fiber ports, wherein M and N are natural numbers greater than or equal to 2) wavelength selection switch can be achieved.

The invention discloses a three-dimensional image optical reconstruction method and system based on phase shift compression Fresnel holography, and belongs to the technical field of data security, andthe method comprises the steps: carrying out the encryption of a three-dimensional object through a random phase mask, and obtaining three different holograms through the three different phase shiftsof reference light; calculating the complex amplitude of the object light field from the three different holograms by using a three-step phase shift method; and reconstructing the three-dimensional object from the complex amplitude of the object light field by using a compressed Fresnel holographic method and a secret key. According to the method, firstly, a complex object light field on a CCD imaging detector plane is calculated by using a three-step phase shift method for a hologram of a three-dimensional object obtained by encryption, and then a three-dimensional image is reconstructed byusing a compressed Fresnel holographic technology and a correct secret key, so that the interference of a square field term and a direct current term is effectively avoided, and the feasibility and superiority of image reconstruction are superior to those of the traditional method.

An ink-jet recording head has a plate-shaped member including a first layer with a partition wall formed by a first etching process and defining a pressure chamber, an ink inlet passage and a common ink storage chamber, a second layer with a land formed by a second etching process so as to correspond to the pressure chamber, and an intermediate layer sandwiched between the first and the second layers. The recording head also has a pressure producing device disposed with its extremity in contact with the land, and a nozzle plate with a nozzle hole bonded to the front surface of the plate-shaped member. An ink particle is jetted through the nozzle hole when the pressure in the pressure chamber is changed by the pressure producing device.

An ink-jet head having a passage unit including pressure chambers each having one end coupled to a nozzle and the other end to be coupled to an ink supply source. The pressure chambers are arranged in a matrix adjacent to each other. The ink-jet head further includes an actuator unit attached to a surface of the passage unit for changing the volume of each of the pressure chambers. The actuator unit includes a piezoelectric sheet disposed to continuously extend over the pressure chambers, a common electrode disposed on one side of the piezoelectric sheet and kept at a constant potential, individual electrodes disposed on the other side of the piezoelectric sheet at positions corresponding to the respective pressure chambers, and recesses formed in regions of the piezoelectric sheet corresponding to portions between the pressure chambers.

This invention provides an optical transceiver that can attain a single-wire two-way communication in a simple structure. In an optical integrated chip, a light emitting element and a light receiving element are formed on the same chip, and a light emitting section and a light receiving section are closely placed. A via hole into which an optical fiber is inserted is penetrated in a circuit board. The optical integrated chip is mounted on a rear of the circuit board, at a position where the light emitting and receiving sections are fitted into the via hole. The optical fiber is inserted into the via hole, from the surface of the circuit board. Thus, light from the light emitting section is inputted to the optical fiber, and light from the optical fiber is inputted to the light receiving section. Hence, the single-wire two-way communication is attained.

A display device includes: a liquid crystal panel including a display surface on which frame images are displayed; a conversion portion for converting a frame image signal into a first image signal representing an image having a lower resolution and a second image signal representing an image having a higher resolution; and a liquid crystal driver for driving the liquid crystal panel with performing first and second scanning operations of the first and second image signals over pixels of the entire display surface. The liquid crystal driver performs the second scanning operation with targeting a drive luminance value which is set in response to an expected value of an achieved luminance value during the first scanning operation for the pixel of the display surface before the second scanning operation commences, and target luminance value for the pixels defined by the frame image signal.

An electronic display device includes a display unit including a plurality of scan lines, a plurality of data lines, and a plurality of pixels, and a barrier unit covering the display unit, including a plurality of first areas and a plurality of second areas alternately arranged along a length direction of the data lines, a first electrode group respectively provided in each of the first areas, each of the electrode groups including a plurality of first sub-electrodes and a plurality of second sub-electrodes alternately arranged along a length direction of the scan lines, a second electrode group provided in each of the second areas on a layer that is different from a layer on which the first electrode group is provided, each of the second electrode groups including a plurality of third sub-electrodes and a plurality of fourth sub-electrodes alternately arranged along the length direction of the scan line, and an insulation layer between the first and second electrode groups.