Abstract: A three-color light source 1 is a three-color light source that combines red, green, and blue laser light so as to output light. The three-color light source 1 includes a red LD 11, a green LD 12, a blue LD 13, a first collimator lens 61, a second collimator lens 62, a third collimator lens 63, a first wavelength filter 81, a second wavelength filter 82, a carrier 30 that is equipped with the LDs 11 to 13, the collimator lenses 61 to 63, and the wavelength filters 81 and 82, and a TEC 40 that is equipped with the carrier 30. The red LD 11 is formed of a GaAs-based material, and the green LD 12 and the blue LD 13 are formed of GaN-based materials.

Abstract: A flexible display device includes a display panel configured to display images, a first substrate having a plurality of pixels disposed therein, and a second substrate coupled to the first substrate. The first substrate includes a display area, a bent part extending from the display area, and a pad part extending from the bent part. The flexible display device further includes a panel driver coupled to the pad part of the first substrate and configured to supply signals to the plurality of pixels on the display panel for displaying images. The first substrate further includes a first surface and a second surface, and the second substrate includes a third surface and a fourth surface. The first surface of the first substrate faces the fourth surface of the second substrate. The first substrate is curved at the bent part of the first substrate such that the pad part of the first substrate and the panel driver are disposed below the display area.

Abstract: A method for producing a quantum cascade laser includes the steps of forming a laser structure including a mesa structure and a buried region embedding the mesa structure; forming a mask on the laser structure, the mask including a first pattern that defines a ?/4 period distribution Bragg reflector structure and a second pattern that defines a 3?/4 period distribution Bragg reflector structure; and forming a first distribution Bragg reflector structure, a second distribution Bragg reflector structure, and a semiconductor waveguide structure by dry-etching the laser structure through the mask, the semiconductor waveguide structure including the mesa structure that has first and second end facets. The first distribution Bragg reflector structure is optically coupled to the first end facet. The second distribution Bragg reflector structure is optically coupled to the second end facet. Here, ? denotes a value of an oscillation wavelength of the quantum cascade laser in vacuum.

Abstract: In various embodiments, wavelength beam combining laser systems incorporate etalons to establish external lasing cavities and/or to combine multiple input beams into a single output beam.

Abstract: A liquid crystal Fresnel lens is provided. The liquid crystal Fresnel lens includes a liquid crystal cell and two polarizers. The liquid crystal cell includes: two transparent substrates having conducting layers disposed thereon with alignment layers, wherein an alignment pattern formed by the alignment layers are configured to provide multiple alignment domains in a Fresnel zones pattern, and wherein an easy axis of adjacent alignment domains are oriented at an angle relative to one another; and a ferroelectric liquid crystal layer disposed between the two transparent substrates, wherein the ferroelectric liquid crystal layer has a planar surface orientation and smectic layers perpendicular to the two transparent substrates. The liquid crystal cell is disposed between the two polarizers.

Abstract: A liquid crystal display device (100) includes a liquid crystal layer (30) of a vertical alignment type, a first photo-alignment film (12), and a second photo-alignment film (22). The first photo-alignment film includes a first pre-tilt region (12a) and a second pre-tilt region (12b) defining pre-tilt directions (PD1, PD2) that are anti-parallel to each other. The second photo-alignment film includes a third pre-tilt region (22a) and a fourth pre-tilt region (22b) defining pre-tilt directions (PD3, PD4) that are anti-parallel to each other. The entire boundary (BD1) between the first pre-tilt region and the second pre-tilt region and the entire boundary (BD2) between the third pre-tilt region and the fourth pre-tilt region are aligned with each other, as seen from the display plane normal direction.

Abstract: Display devices and color filtering layers having an oriented nucleic acid layer are disclosed. The display device can include a light-orienting layer disposed between an oriented nucleic acid layer and a polarizing layer. In some embodiments, polarizing layer may include an oriented nucleic acid layer. The color filtering layer can include an oriented nucleic acid layer and two or more pigments. Methods of making the color filtering layer are also disclosed.

Abstract: An emitting device is intended for delivering photons with a chosen wavelength. This emitting device includes an InP substrate with a directly modulated laser arranged for generating photons modulated by a non-return-to-zero modulation to produce data to be transmitted, a passive ring resonator monolithically integrated with the directly modulated laser and having a resonance amongst several ones that is used for filtering a zero level induced by the data modulation, and a tuning means arranged along the directly modulated laser and/or around the ring resonator to tune the photon wavelength and/or the ring resonator resonance used for filtering.

Abstract: An optical semiconductor device has a semiconductor laser which emits front-end-surface-side emergent light on the front end surface side and emits rear-end-surface-side emergent light on the rear end surface side, and a mount substrate having the semiconductor laser provided on its front surface. The rear-end-surface-side emergent light is emitted while having an emergence optical axis that extends away from the mount substrate with increase in distance from the rear end surface.

Abstract: A laser includes a reflective gain medium (RGM) comprising an optical gain material coupled with an associated reflector. The RGM is coupled to a spot-size converter (SSC), which optically couples the RGM to an optical reflector through a silicon waveguide. The SSC converts an optical mode-field size of the RGM to an optical mode-field size of the silicon waveguide. A negative thermo-optic coefficient (NTOC) waveguide is fabricated on top of the SSC. In this way, an optical signal, which originates from the RGM, passes into the SSC, is coupled into the NTOC waveguide, passes through the NTOC waveguide, and is coupled back into the SSC before passing into the silicon waveguide. During operation, the RGM, the spot-size converter, the NTOC waveguide, the silicon waveguide and the silicon mirror collectively form a lasing cavity for the athermal laser. Finally, a laser output is optically coupled to the lasing cavity.

Abstract: A display device includes a substrate including an array area in which an image is displayed and a pad area in which an image is not displayed, gate lines in the array area and elongated in a first direction on the substrate, gate lines pads in the pad area and respectively electrically connected to the gate lines, floating patterns disposed in the pad area, a first shorting bar in the pad area and with which electrostatic energy from the floating patterns is dissipated; and first shorting bar lines in the pad area and defined by first lines respectively connected to the floating patterns and second lines spaced apart from the first lines and connected to the first shorting bar, wherein ends of the second lines respectively face ends of the first lines.

Abstract: A display device is provided with a pixel and a dummy pixel including a gate line and a signal line. The dummy pixel includes the gate line and a dummy semiconductor layer crossing the gate line through an insulating layer. The dummy semiconductor layer is electrically separated from the dummy semiconductor layer of the dummy pixel adjacent in the Y direction dummy pixel. The dummy pixel further includes a dummy signal line extending in the Y direction. The dummy signal line is connected to the dummy semiconductor layer through a plurality of contact holes. The contact holes are arranged with the gate line interposed between them in plan view.

Abstract: A liquid crystal display comprises a liquid crystal panel and a backlight unit. The liquid crystal panel includes a main display area and a sub-display area protruding from the main display area. The backlight unit includes a light guide plate having a main light plate below the main display area and a sub-display light plate below the sub-display area. A first light source emits first light primarily into the main light plate below the main display area and a second light source emits second light primarily into the sub-display light plate below the sub-display area.

Abstract: An intra-cavity doubled OPS-laser has a laser-resonator including a birefringent filter (BRF) for coarse wavelength-selection, and an optically nonlinear (ONL) crystal arranged for type-II frequency-doubling and fine wavelength-selection. Laser-radiation circulates in the laser-resonator at one of a range of fundamental wavelengths dependent on the resonator length. The ONL crystal has a transmission peak-wavelength dependent on the crystal temperature. Reflection of circulating radiation from the BRF is monitored. The reflection is at a minimum when the ONL crystal transmission-peak wavelength is at the circulating radiation wavelength. The temperature of the ONL crystal is selectively varied to maintain the monitored reflection at about a minimum.

Abstract: Disclosed is a circuit having a high speed laser driver circuit, a semiconductor laser electrically connected to the high speed laser driver circuit, and an adjustable termination circuit electrically connected between the high speed laser driver circuit and the semiconductor laser, where the adjustable termination circuit is configured to control an output impedance seen by the semiconductor laser as a function of an input current provided to the adjustable termination circuit.

Abstract: There are provided connecting wires whose reliability may be ensured by preventing leakage between the connecting wires and by preventing entry of moisture. Overexposure is performed by using a mask having a shape of a protruding pattern (55a) with a sharp tip end at a position corresponding to a pattern edge of an organic insulating film (70) between adjacent connecting wires (50). Inclination of an inclined surface of the organic insulating film (70) sandwiched by the connecting wires (50) is thereby made gradual, and thus, at the time of forming the connecting wires (50), a film thickness of a resist may be prevented from becoming thick along an edge line of the organic insulating film (70). As a result, the resist is prevented from remaining in a connected manner at a region sandwiched by the adjacent connecting wires (50), and leakage between the adjacent connecting wires (50) may be prevented.

Abstract: A laser apparatus able to prevent the formation of condensation at the time of maintenance work. The laser apparatus includes a housing having an openable sealed structure, an optical system set inside the housing, a temperature regulation mechanism maintaining the optical system at a predetermined temperature, and a preparatory step controller controlling a preparatory step performed before opening the housing. The temperature regulation mechanism is configured to maintain the optical system at a first temperature during operation of the laser apparatus and to maintain the optical system at a second temperature of the first temperature or more when the preparatory step is started.

Abstract: A substrate for a liquid crystal display device includes: a substrate including a display region displaying an image and a non-display region surrounding the display region; a dummy pattern in the non-display area over the substrate, the dummy pattern having a length that corresponds to a side of the display area; and an orientation film on the dummy pattern, the orientation film covering the non-display area and the whole display area.

Abstract: This invention reduces or prevents a phenomenon where a screen close to a light source becomes yellowed. A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate 10 and white LEDs 21 arrayed in a first direction on a plane of incidence 11 of the light guide plate 10. The white LEDs 21 each includes, in the first direction on a light-emitting surface, a central area occupied by a blue spectrum more densely than at adjacent sides of the central area. Incident plane protrusions 111, each extending in a thickness direction of the light guide plate 10, are formed on a section corresponding to the area having the dense blue spectrum of each LED 21, at the plane of incidence 11 of the light guide plate 10.

Abstract: Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).