摘要:
A vertical cavity surface emitting laser semiconductor chip including a vertical cavity surface emitting laser (VCSEL) formed on a substrate, a photodetector, integrated with the vertical cavity surface emitting laser for automatic power control (APC) of the vertical cavity surface emitting laser and a driver circuit, integrated with the vertical cavity surface emitting laser and the photodetector. The VCSEL, photodetector and driver circuit are integrated by utilizing a monolithic polysilicon layer. The driver circuit is characterized as a CMOS driver circuit, capable of receiving feedback from the photodetector and adjusting the output power of the vertical cavity surface emitting laser in response to the feedback, thus achieving APC of the VCSEL.
摘要:
An integrated electro-optical package including an array composed of a substrate having defined thereon a plurality of unit cells, composed of active and inactive areas. The substrate having positioned thereon a major surface, a plurality of sub-arrays and driver/control circuits. The sub-arrays, defining the active area formed within each unit cell, and being composed of a plurality of light emitting devices. The driver/control circuits mounted to the substrate within the inactive area of each unit cell. The electro-optical package fabricated to allow for scanning of the active area of each unit cell to create a resultant integrated image of increased resolution, without an increase in the number of pixels formed by the light emitting devices of the sub-arrays.
摘要:
A VCSEL for high power single mode operation and method of fabrication including a substrate element, a first stack of distributed Bragg reflectors disposed on a surface of the substrate element, an active region lattice matched to a surface of the first stack of distributed Bragg reflectors, and a second stack of distributed Bragg reflectors lattice matched to a surface of the active region. The VCSEL structure includes an isolation layer formed on the second stack of distributed Bragg reflectors. The isolation layer is formed of a dielectric material or insulating semiconductor material having an index of refraction greater than the first and second stacks of distributed Bragg reflectors and thereby defining an anti-guiding VCSEL structure. An electrical contact is coupled to a surface of the second stack of distributed Bragg reflectors and an electrical contact is positioned a surface of the substrate element.
摘要:
A full color organic light emitting backlight device for liquid crystal display applications defined by a first OLED panel, designed to emit light in a red bandwidth, a second OLED panel, positioned adjacent the first OLED panel and designed to emit light in a green bandwidth, and a third OLED panel, positioned adjacent the second OLED panel and designed to emit light in a blue bandwidth. The light emitting device having positioned on an uppermost surface a liquid crystal display. The device intended for incorporation into portable electronic devices. The device is fabricated to achieve a full color image using field sequential color techniques.
摘要:
An active matrix OED array includes an array area defined on a semiconductor substrate defining rows and columns of pixels and driver areas spaced from the array area with driver circuits including row drivers coupled to row buses and column drivers coupled to column buses formed in the driver areas. An active control circuit and an OED are formed in each pixel of the array area and coupled to a row and a column bus adjacent each pixel. A second substrate is formed of light transmissive material and includes externally accessible electrical connectors coupled to the driver circuits. The semiconductor substrate includes a first bump pad encircling the array area and the second substrate includes a mating second bump pad with the first and second bump pads engaged to seal the array area.
摘要:
A method of fabricating an active matrix LED array includes forming layers of material on a substrate, which layers cooperate to emit light when activated. Row and column dividers are formed in the layers to divide the layers into an array of LEDs arranged in rows and columns. One FET is formed on the row dividers in association with each LED and a source of each FET is connected to an anode of the associated LED. Row and column buses are formed on the row and column dividers, respectively, and the drain of each FET is connected to an adjacent row bus with the gate of each FET being connected to an adjacent column bus. A cathode for each LED is connected as a common terminal for all of the LEDs in the array.
摘要:
An integrated matrix of light emitting devices includes a plurality of isolated semiconductor LEDs positioned in a matrix of rows and columns on the surface of a substrate. A plurality of column buses, one each positioned adjacent each column of semiconductor LEDs, is provided with each of the column buses being connected to a first terminal of each semiconductor LED in the adjacent column of semiconductor LEDs and each of the column buses providing an exposed planar surface. A plurality of OEDs is positioned on the exposed planar surface of each column bus with a first terminal of each OED connected to the column bus.
摘要:
An OED with a first microcavity including a first transparent spacer positioned adjacent the diode light output and a first mirror stack positioned on the first spacer to reflect light back into the OED and to define an optical length of the first microcavity. The optical length of the first microcavity being such that light emitted from the first microcavity has a first spectrum. A second microcavity including a second transparent spacer positioned adjacent the first microcavity and a second mirror stack positioned on the second spacer to reflect light toward the first microcavity and to define an optical length of the second microcavity. The optical length of the second microcavity being such that light emitted from the second microcavity has a second spectrum. Additional microcavities can be placed in the structure to further enhance and alter the light spectrum.
摘要:
A visual display system, composed of an array of light emitting devices, forming an image source, a phase spatial light modulator scanner, driver/control circuitry and an optical magnification system. The display system being enclosed within a housing, thereby forming an optical magnifier. The phase spatial light modulator scanner is operative in either a transmissive mode or a reflective mode. In operation, an external stimulus, such as a voltage, is applied to the scanner, thereby changing the phase of light emitted therethrough. The scanning action enhances display resolution of the generated resultant image without an increase in the number of pixels of the image source. The phase spatial light modulator scanner operates by scanning sub-pixels, pixel groups, and/or sub-arrays of the image source.
摘要:
A phase spatial light modulator composed of a liquid crystal memory cell and a liquid crystal polarization switch. The liquid crystal memory cell having phase information recorded during the fabrication process thereby affecting the liquid crystal material contained within the cell. The liquid crystal polarization switch capable of perpendicularly rotating the polarization of light impinging upon the liquid crystal polarization switch, prior to passage through the liquid crystal memory cell in response to an applied voltage. The modulator, or scanner, thereby capable of modulating the phase of light passing therethrough, resulting in a high resolution resultant integrated image