Philips

About: Philips is a company organization based out in Vantaa, Finland. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 68260 authors who have published 99663 publications receiving 1882329 citations. The organization is also known as: Koninklijke Philips Electronics N.V. & Royal Philips Electronics.

Solution of the time-dependent Boltzmann equation

Abstract: The time-dependent Boltzmann equation, which describes the propagation of radiation from a point source in a random medium, is solved exactly in Fourier space. An explicit expression in real space is given in two and four dimensions. In three dimensions an accurate interpolation formula is found. The average intensity at a large distance $r$ from the source has two peaks, a ballistic peak at time $t=r/c$ and a diffusion peak at $t\ensuremath{\simeq}{r}^{2}/D$ (with $c$ the velocity and $D$ the diffusion coefficient). We find that forward scattering adds a tail to the ballistic peak in two and three dimensions, $\ensuremath{\propto}(ct\ensuremath{-}{r)}^{\ensuremath{-}1/2}$ and $\ensuremath{\propto}\ensuremath{-}\mathrm{ln}(ct\ensuremath{-}r)$, respectively. Expressions in the literature do not contain this tail.

Scan chain design for test time reduction in core-based ICs

Abstract: The size of the test vector set forms a significant factor in the overall production costs of ICs, as it defines the test application time and the required pin memory size of the test equipment. Large core-based ICs often require a very large test vector set for a high test coverage. This paper deals with the design of scan chains as transport mechanism for test patterns from IC pins to embedded cores and vice versa. The number of pins available to accommodate scan test is given, as well as the number of scan test patterns and scannable flip flops of each core. We present and analyze three scan chain architectures for core-based ICs, which aim at a minimum test vector set size. We give experimental results of the three architectures for an industrial IC. Furthermore we analyze the test time consequences of reusing cores with fixed internal scan chains in multiple ICs with varying design parameters.

Methods and apparatus for remotely controlled illumination of liquids

Abstract: Methods and apparatus for remotely controlled illumination of liquids in a variety of environments. In one example, remotely controlled multi-color LED-based light sources are employed to achieve a wide range of enhanced lighting effects in liquids. In another example, a pool or spa is illuminated by one or more remotely controlled multicolor light sources that may be employed as individually and independently controllable devices, or coupled together to form a remotely controlled networked lighting system to provide a variety of programmable and/or coordinated color illumination effects in the pool or spa environment.

Assembly of a display device and an illumination system

Abstract: The system comprises a display device having a pattern of pixels associated with color filters (5B, 5G, 5R) and a backlight system for illuminating the display device, which backlight system comprises a light-emitting panel (11) and a light source (16) associated with the light-emitting panel (11). The light source (16) comprises a plurality of light-emitting diodes (LEDs) of at least three different colors, the LEDs being associated with the color filters (5B, 5G, 5R). Preferably, the spectral emission of each of the LEDs substantially matches the transmission spectrum of the color filters (5B, 5G, 5R). Preferably, the bandwidth (FWHM = full width at half maximum) of the LEDs ranges from 10 ( FWHM ( 50 nm. Preferably, the intensity of the light emitted by the LEDs varies with the light level of the image to be displayed by the display device. Preferably, the intensity of the light emitted by the backlight system is controllable on a frame-to-frame basis and, preferably, for each color. Preferably, the LEDs comprise a plurality of red, green, blue (and amber) LEDs, each having a luminous flux of at least 5 lumen. Due to the comparatively small bandwidth of the LEDs, much larger color spaces can be obtained using existing color filter technology.