Patent application number | Description | Published |
20080278416 | Multiple grayscale display method and apparatus - In a PDP apparatus (multiple grayscale display apparatus), an technique for reducing the unevenness of the electric charge states between cells and the background emission by the reset discharge, and also reducing the false outline, therefore, the image quality can be improved, and the drive can be stabilized is provided. In a multiple grayscale display method by sub field method, a structure in which as a sub field lighting pattern, in only specified sub fields (example: SF | 11-13-2008 |
20090201276 | DRIVING METHOD OF A PLASMA DISPLAY DEVICE AND A PLASMA DISPLAY DEVICE - At an on-cell reset, a positive ramp wave of an ultimate voltage, which is larger than a maximum voltage of a sustain pulse, and smaller than an ultimate voltage of a positive ramp wave applied to a Y electrode at an all-cell reset, is applied to the Y electrode to make a weak discharge occur at a cell where it is non-lighting at a previous sub-field and a wall charge thereof is decreased due to an influence from an adjacent cell, thereby, it makes it possible to return a wall charge state to a normal state, to be capable of lighting a cell to be lighted securely based on a display data. | 08-13-2009 |
20090289926 | PLASMA DISPLAY DEVICE - A plasma display device includes: a display panel which has a plurality of X and Y display electrodes and a plurality of address electrodes crossing the X and Y display electrodes; an electrode drive circuit which drives the X and Y display electrodes and address electrodes; and a drive circuit which control the electrode drive circuit. The drive control circuit performs an address drive control for selectively turning cells ON in each subfield, sustain drive control for generating sustain discharge in the ON cells, and reset drive control for resetting charges on the electrodes by applying slope pulse voltage on the Y display electrodes. The drive control circuit also performs reset drive control corresponding to the sustain discharge count. | 11-26-2009 |
Patent application number | Description | Published |
20130126941 | SEMICONDUCTOR OPTICAL DEVICE - A semiconductor optical device includes a first clad layer, a second clad layer and an optical waveguide layer sandwiched between the first clad layer and the second clad layer, wherein the optical waveguide layer includes a first semiconductor layer, a second semiconductor layer disposed on the first semiconductor layer and extending in one direction, and a third semiconductor layer covering a top surface of the second semiconductor layer, and wherein the first semiconductor layer includes an n-type region disposed on one side of the second semiconductor layer, a p-type region disposed on the other side of the second semiconductor layer, and an i-type region disposed between the n-type region and the p-type region, and wherein the second semiconductor layer has a band gap narrower than band gaps of the first semiconductor layer and the third semiconductor layer. | 05-23-2013 |
20140133511 | SEMICONDUCTOR OPTICAL ELEMENT - Two or more first reflectors are formed on a substrate. Each of the first reflectors reflects the light input to its input port and returns it there, while exhibiting a reflection spectrum featuring a peak at the target wavelength. A first optical coupler is formed on the substrate to divide the light output from an optical amplifier and output the divided lights to the input ports of the two or more first reflectors, as well as combining the reflected lights from the first reflector and re-inputting the combined light to the optical amplifier. Each of the first reflectors contains a ring resonator of the same size, and the delay for the light input to the input port of a first reflector to return there after being reflected is the same for all first reflectors. | 05-15-2014 |
20150050020 | OPTICAL TRANSCEIVER AND OPTICAL OUTPUT LEVEL CONTROL METHOD - A receiving-side integrated optical circuit of an optical transceiver has an optical wavelength demultiplexer to separate signal light components of the different wavelengths contained in a wavelength division multiplexed signal received from each of N links of a transmission path, a set of N optical amplifiers inserted between the transmission path and the optical wavelength demultiplexer, each optical amplifier being configured to collectively amplify the signal light components of the different wavelengths contained in the received wavelength division multiplexed signal, and a set of photo detectors arranged after the optical wavelength demultiplexer and to detect the signal light components of the different wavelengths. | 02-19-2015 |
20150303653 | OPTICAL DEVICE, OPTICAL TRANSMISSION DEVICE, OPTICAL RECEPTION DEVICE, HYBRID LASER AND OPTICAL TRANSMISSION APPARATUS - An optical device includes a silicon waveguide core having a tapered portion having a sectional size that decreases toward a terminal end portion thereof, a dielectric waveguide core contiguous to the silicon waveguide core while covering at least the tapered portion, the dielectric waveguide core having a refractive index lower than that of the silicon waveguide core and configuring a single-mode waveguide, and a diffraction grating provided at the single-mode waveguide and configuring a distributed Bragg reflection mirror. | 10-22-2015 |