초록 ▼

A screen apparatus includes a perimeter frame with a notch and arcuate foot in one of the bottom corners that are adapted to receive a raised floor device, such as a raised power outlet. A covering covers the frame but the notch is not covered. The covering is preferably a light-passing translucent

A screen apparatus includes a perimeter frame with a notch and arcuate foot in one of the bottom corners that are adapted to receive a raised floor device, such as a raised power outlet. A covering covers the frame but the notch is not covered. The covering is preferably a light-passing translucent sheet of performance fabric which is adapted to pass light sufficient for a viewer to see a person behind the screen, but which scatters and blocks sufficient light to provide privacy by hiding details of the person's work from the viewer. The screen apparatus also includes bowed frame members extending horizontally between some of the outer frame members. The perimeter frame and bowed frame members space the front and rear panels of the covering from each other in a three-dimensionally curved manner, which results in additional visual hiding power to the screen apparatus and further results in a novel appearance of sweeping arcuate visual lines based on the non-planar partial-see-through condition of the two-panel covering. A hub is provided for selectively interconnecting screens in a radial arrangement.

대표청구항 ▼

A screen apparatus includes a perimeter frame with a notch and arcuate foot in one of the bottom corners that are adapted to receive a raised floor device, such as a raised power outlet. A covering covers the frame but the notch is not covered. The covering is preferably a light-passing translucent

A screen apparatus includes a perimeter frame with a notch and arcuate foot in one of the bottom corners that are adapted to receive a raised floor device, such as a raised power outlet. A covering covers the frame but the notch is not covered. The covering is preferably a light-passing translucent sheet of performance fabric which is adapted to pass light sufficient for a viewer to see a person behind the screen, but which scatters and blocks sufficient light to provide privacy by hiding details of the person's work from the viewer. The screen apparatus also includes bowed frame members extending horizontally between some of the outer frame members. The perimeter frame and bowed frame members space the front and rear panels of the covering from each other in a three-dimensionally curved manner, which results in additional visual hiding power to the screen apparatus and further results in a novel appearance of sweeping arcuate visual lines based on the non-planar partial-see-through condition of the two-panel covering. A hub is provided for selectively interconnecting screens in a radial arrangement. d by said laser unit in response to an applied principal bias voltage, said electroabsorption modulator having a band gap wavelength varying with voltage applied to said electroabsorption modulator and differing by Δλ from the oscillation wavelength being produced by one of said semiconductor lasers; a coupling unit coupling said laser unit and said optical modulation unit so that laser light from each of said semiconductor lasers is incident on said electroabsorption modulator; a temperature control unit for controlling, by heating and cooling, temperature of said laser unit and of said optical modulation unit, said laser device outputting light at at least twice as many oscillation wavelengths as number of semiconductor lasers in said laser unit by selectively controlling the temperature of said laser unit at at least two different controlled temperatures; a laser selection unit for selecting and operating one of said plurality of semiconductor lasers in said laser unit; an offset bias control unit for selective application of an offset bias voltage to said electroabsorption modulator of said optical modulation unit for offsetting the principal bias voltage applied to said electroabsorption modulator to adjust the band gap wavelength of said electroabsorption modulator so that a constant Δλ is maintained for the oscillation wavelength being produced by said semiconductor laser selected and operated by said laser selection unit; and a controller for specifying, for said laser selection unit, the one of said plurality of semiconductor lasers to be operated, based on an external command specifying a wavelength of light to be produced, and for controlling operation of said temperature control unit and said offset bias control unit to maintain the constant wavelength difference Δλ. 2. The semiconductor laser device according to claim 1, wherein said laser unit, said coupling unit, and said optical modulation unit are integrated on a single semiconductor substrate as a semiconductor laser chip, and said temperature control unit controls temperature of said semiconductor laser chip. 3. The semiconductor laser device according to claim 1, wherein said laser unit, said coupling unit, and said optical modulation unit are packaged on a single substrate as a hybrid integrated circuit, and said temperature control unit controls temperature of said hybrid integrated circuit. 4. The semiconductor laser device according to claim 1, wherein said laser unit, said coupling unit, and said optical modulation unit are discrete modules, and said temperature control unit controls temperature of each of said modules. 5. The semiconductor laser device according to claim 1, wherein said electroabsorption modulator of said optical modulation unit has a light absorption layer with a multiquantum well structure. 6. The semiconductor laser device according to claim 1, wherein said electroabsorption modulator of said optical modulation unit has a light absorption layer with a strained multiquantum well structure. 7. A semiconductor laser device comprising: a laser unit having a single semiconductor laser including multiple electrodes and selectively oscillating at each of a plurality of different oscillation wavelengths depending upon relative currents supplied to the respective electrodes; an optical modulation unit having a single electroabsorption modulator for optically modulating laser light produced by said laser unit in response to an applied principal bias voltage, said electroabsorption modulator having a band gap wavelength varying with voltage applied to said electroabsorption modulator and differing by Δλ from the oscillation wavelength being produced by said semiconductor laser; a coupling unit coupling said laser unit and said optical modulation unit so that laser light from said laser unit is incident on said electroabsorption modulator; a temperature control unit for controlling, by heating and cooling, temperature of s