The invention concerns a semiconductor laser structure comprising a light guiding core (13) arranged between a lower confinement layer (15) and an upper confinement layer (14) including an etched stripe (16) charging the core to form an optical guide, the guide core including an amplifying section (1) delimited by two reflectors forming a resonant cavity enabling selection of a laser mode whereof the wavelength is tunable. The invention is characterized in that at least one reflector consists of a photonic crystal section (2) consisting of at least one pair of arrays of holes (19) arranged on either side of the guide stripe (16) each array of holes (19) of the photonic crystal section having holes forming a trapezium, the large base of the trapezium being further from the stripe than the small base.

A printer includes a pair of feet upon which the printer can rest. A pair of spaced apart and upright legs extends from respective feet. A supply spool is rotationally mounted between the legs and is configured to carry a wound length of print media. A printhead assembly is fast between the legs and defines a passage through which print media unwound from the supply spool can pass. The printhead assembly includes a printhead which can eject ink onto the print medium passing through the passage. An uptake spool is rotationally mounted between the legs and the printed print medium can be wound thereon.

A wide-format inkjet print engine includes an elongate chassis. A channel member is mounted on the chassis. The channel member and the chassis span a print zone. An ink reservoir assembly is mounted in the channel member and defines at least one ink reservoir that extends a length of the channel member and is connectable to an ink supply. A plurality of printhead modules is mounted on the ink reservoir assembly, each printhead module having a printhead integrated circuit mounted on a carrier, each printhead integrated circuit having a plurality of nozzle arrangements incorporating micro-electromechanical actuators for ejecting ink from respective ink chambers. A plurality of print engine controllers is mounted on the chassis. Each print engine controller is electrically connected to a number of the printhead integrated circuits and is configured to control operation of the number of the printhead integrated circuits.

This invention provides a wide viewing angle liquid crystal display and a method for achieving wide viewing angle effect. The invention adds conductive nanoparticles in a liquid crystal layer of the present liquid crystal display. When a driving voltage is applied on the present liquid crystal display, an electric field applied on the liquid crystal layer is distorted by the conductive nanoparticles dispersed in the liquid crystal layer. A non-uniform electric field is hence formed in the liquid crystal layer and the liquid crystal molecules are prone to multi-directional alignments. As such, a wide viewing angle effect can be achieved.

A printer is provided having, supported by a support structure, a print assembly and feed mechanism for feeding print media though a printing zone. The print assembly has an elongate carrier mounted to the support structure which mounts printhead integrated circuits and control circuitry connected to the printhead ICs. The elongate printing zone defined by the printhead ICs is at least 914 mm. Each printhead IC incorporates nozzle arrangements having a nozzle, ink chamber, ink inlet, actuator, and drive circuit to achieve ink ejection at more than one billion ink drops per second. The printhead ICs are each positioned at a common angle of greater than zero degrees and less than ninety degrees with respect to a straight line extending at right angles to a feed direction of print media, with consecutive ends of the printhead integrated circuits overlapping to ensure continuous printing in the printing zone.

A print assembly is provided having an elongate carrier that is mountable on a support structure of a printer, printhead integrated circuits mounted on the carrier, and control circuitry positioned on the carrier and operatively connected to the printhead integrated circuits to control operation thereof. The printhead integrated circuits are provided in a number and configuration such that the printhead integrated circuits define an elongate printing zone of at least 914 mm. Each printhead integrated circuit incorporates nozzle arrangements each having a nozzle, an ink chamber, an ink inlet, an actuator, and a drive circuit to achieve the ejection of ink from the nozzle arrangement. the nozzle arrangements and control circuitry are configured so that the printhead integrated circuits are controlled by the control circuitry to print more than one billion drops of ink per second.

A print assembly is provided having an elongate carrier that is mountable on a support structure of a printer, printhead integrated circuits mounted on the carrier, and control circuitry positioned on the carrier and operatively connected to the printhead integrated circuits to control operation thereof. The printhead integrated circuits are provided in a number and configuration such that the printhead integrated circuits define an elongate printing zone of at least 914 mm. Each printhead integrated circuit incorporates nozzle arrangements each having a nozzle, an ink chamber, an ink inlet, an actuator, and a drive circuit to achieve the ejection of ink from the nozzle arrangement. the nozzle arrangements and control circuitry are configured so that the printhead integrated circuits are controlled by the control circuitry to print at least 1200 dots per inch.

A print assembly is provided having an elongate carrier that is mountable on a support structure of a printer, printhead integrated circuits mounted on the carrier, and CMOS drive circuitry positioned on the carrier and operatively connected to the printhead integrated circuits to drive operation thereof. The printhead integrated circuits are provided in a number and configuration such that the printhead integrated circuits define an elongate printing zone of at least 914 mm. Each printhead integrated circuit incorporates nozzle arrangements each having a nozzle, an ink chamber, an ink inlet, an actuator, and a drive circuit to achieve the ejection of ink from the nozzle arrangement.

Wide angle, limited rotation, on-axis scanning with a micro objective lens, which is preferably aspheric, and is mounted on a rigid rotary structure that oscillates about a limited arc while a translation system translates the object under the arcuate scan. The micro objective lens communicates optically with a stationary optical system via a light path which, in part, extends along the axis of rotation of the rigid rotary structure. The rotary micro objective lens is shown to cooperate with stationary optics. Predetermined defocusing of some wavelengths relative to others in opposite sense to chromatic aberration of a micro objective lens enable focus by the micro objective lens of multiple wavelengths on the same point. Data collection in a rotary, on-axis scanner is controlled by detecting the actual position of the rotating structure, which may move at constant speed during data collection. Interpolation of arcuate scan data to a raster pattern is achieved by data sampling at positions that correspond with rectilinear rows of the raster pattern and averaging the sampled data points of a row that straddle a raster point. This results in fast, economical interpolation. Novel microscope processes use features provided by the instruments described.

The present invention is directed to methods and a bio-capacitor sensing device for the detection of toxic chemicals using bacteria. The sensing platform comprises gold interdigitated capacitor with a defined geometry, a layer of carboxy-CNTs immobilized with viable E. coli cells as sensing elements. Also included are methods of making the bio-capacitor device and methods for detecting toxic chemicals that induce cellular stress response. The present innovation discloses the development of a bio capacitor chips immobilized with carboxy-CNTs tethered E. coli bacteria. In addition, the present invention also includes determination of behavior and characteristics of chemically stimulated bacteria on biochip using electric field including frequency and/or amplitude as controlling parameters.