Abstract: A luminaire (1) is provided comprising a luminaire housing (3), a light module(5), and a communication module (7). The light module comprises a light source (15) for emitting light from the luminaire (1) and wherein the light module (5) is accommodated at least partly within the luminaire housing (3). The communication module (7) is configured for wireless transmitting and/or receiving communication signals which are unrelated to the 5 lighting function of the luminaire and/or to the operation of the light module. The communication module (7) is accommodated within the luminaire housing (3).

Abstract: Disclosed is a luminaire comprising a lighting unit, and a wireless RF communication device, wherein at least a part of the lighting unit and at least a part of the wireless RF communication device are in thermal contact with a same heat sink component. Examples of wireless communication devices include wireless mmWave backhaul devices for 5G communication.

Abstract: A High Intensity Discharge (HID) lamp includes a discharge chamber disposed within an anti-oxidation envelope and protected by a shroud. The shroud encloses the anti-oxidation envelope and thereby the discharge chamber to prevent the emission of fragments in the event that the discharge chamber fails. The shroud is positioned around the anti-oxidation envelope by a compressed spring at one end of the envelope tensioned against a collar attaching the other end of the envelope to a base of the lamp.

Abstract: A High Intensity Discharge (HID) lamp (100) comprised of a discharge chamber (130) disposed within an anti-oxidation envelope (120) and protected by a shroud (110). The shroud encloses the anti-oxidation envelope and thereby the discharge chamber to prevent the emission of fragments in the event that the discharge chamber fails. The shroud is positioned around the anti-oxidation envelope by means of a compressed spring (170) at one end of the envelope tensioned against a collar (160) attaching the other end of the envelope to a base of the lamp.

Abstract: A cathode ray tube includes a display for presenting an image, a deflection device, and an electron gun including electron-generating cathodes for generating electron beams. The CRT includes an electron beams controller for varying the trajectory of at least a first electron beam of the electron beams as a function of the intensity of at least the first electron beam, in order to compensate for changes in the convergence angle between electron beams near the display. The electrom beam controller is arranged between the electron-generating cathodes and the deflection device.

Abstract: A display device comprising a deflection unit and a cathode ray tube having an in-line electron gun. The electron gun comprises a main lens portion having means for generating a main lens field and an auxiliary field. Furthermore, the electron gun comprises a prefocusing lens portion having a first, a second and a third electrode for generating a prefocusing lens field. In operation, in a direction perpendicular to the in-line plane, the auxiliary field and the main lens cause the electron beam to leave the main lens substantially parallel to the in-line plane, whereby the diameter of the electron beam at a gap of the main lens at the anode side is smaller than or equal to the diameter of the aperture of the second electrode throughout the deflecton of the electron beam across the display screen. By virtue thereof, an improved picture reproduction can be obtained.

Abstract: A cathode ray tube (CRT) (2) comprising a display (4) for presenting an image, a deflection device (10), and an electron gun (12) comprising electron-generating cathodes (22a-c) for generating electron beams (14a-c). Said CRT (2) comprises an electron beam controller for varying the trajectory of at least a first electron beam of the electron beams (14a-c) as a function of the intensity of at least said first electron beam, in order to compensate for changes in the convergence angle between electron beams (14a-c) near the display (4). The electron beam controller is arranged between the electron-generating cathodes (22a-c) and the deflection device (10).

Abstract: A display device comprising a deflection unit and a cathode ray tube having an in-line electron gun. The electron gun comprises a main lens portion having means for generating a main lens field and an auxiliary field. Furthermore, the electron gun comprises a prefocusing lens portion having a first, a second and a third electrode for generating a prefocusing lens field. In operation, in a direction perpendicular to the in-line plane, the auxiliary field and the main lens cause the electron beam to leave the main lens substantially parallel to the in-line plane, whereby the diameter of the electron beam at a gap of the main lens at the anode side is smaller than or equal to the diameter of the aperture of the second electrode throughout the deflecton of the electron beam across the display screen. By virtue thereof, an improved picture reproduction can be obtained.

Abstract: A color display device comprises an electron gun, a display screen and a flat color selection electrode as well as a deflection means. The distance between the electron beams is dynamically varied, whereby the distance in the deflection space decreases as the beams are deflected in at least one direction. The reduction of the distance enables the distance between the color selection electrode and the display screen to be increased in that direction. As a result, the curvature of the inner surface of the color selection electrode may be increased, which has a positive effect on the strength and doming behavior of the color selection electrode.