摘要:
A surface light source device includes a lamp body, a space dividing member, a discharge gas supplying member and a voltage applying part. The lamp body includes a flat shaped space and a fluorescent layer disposed in the flat shaped space to convert an invisible light into a visible light. The space dividing member divides the flat shaped space into a plurality of discharge spaces. The discharge gas supplying member is disposed to pass through the space dividing member and is fixed to the space dividing member, and supplies the discharge spaces with a discharge gas that generates the invisible light. The voltage applying part applies a discharge voltage to the discharge gas. Therefore, the lifetime of the surface light source device generating a planar light is increased, and the luminance of the light becomes uniform so that the display quality of an image is improved.
摘要:
The discharge lamp according to the present invention is composed of a slender translucent airtight vessel 1a, an inner electrode 1c fixed inside one end of 1a, a discharge lamp 1 provided with a discharge medium composed mainly of rare gas, and an outer electrode 2 composed of a conductive wire arranged on the outer surface of translucent airtight vessel 1a. The outer electrode 2 is placed within a half circumference of the translucent airtight vessel in a first area 2a of the translucent airtight vessel 1a, which extends in a range between a top end of the inner electrode 1c and a position having a predetermined length in the forward direction of the translucent airtight vessel 1a. The outer electrode 2 is placed within an entire circumference of the translucent airtight vessel 1a in a second area 2b of the translucent airtight vessel 1a, which extends in the rest of the length of the translucent airtight vessel 1a.
摘要:
The invention relates to a low-pressure gas discharge lamp which includes at least one discharge vessel and at least two capacitive coupling-in structures and operates at an operating frequency f. In order to achieve a better efficiency in combination with a small structural volume, a high luminous flux, a low operating voltage, a low electromagnetic emission, a high resistance against switching transients and a long service life for the low-pressure gas discharge lamp, it is proposed to form each capacitive coupling-in structure from at least one dielectric having a thickness d and a dielectric constant ∈, each dielectric being subject to the condition d/(f.∈)
摘要:
There is provided a fluorescent lamp comprising a tubular glass bulb, an internal electrode provided at the center of the tubular glass bulb, a fluorescent layer formed on an inner surface of the tubular bulb, and an external electrode provided on an outer surface of the tubular glass bulb, said tubular glass bulb being charged with a rare gas containing xenon as a main ingredient, wherein the charged pressure of the rare gas is 100 to 300 torr, the inner diameter of the tubular glass bulb is 4 to 12 mm and the thickness of the tubular glass bulb is 0.4 to 1.2 mm. As a result, lighting voltage is greatly reduced, whereby the charged pressure of the rare gas can be increased, thereby making it possible to improve illuminance.
摘要:
The invention pertains to a method for operating a lighting system with anncoherently-emitting radiation source, in particular a discharge lamp (14) that emits UV, IR or visible-range radiation, by means of dielectrically inhibited discharge, and to a lighting system suitable therefor. The electrodes (16-20), which are arranged side by side and separated from each other and the interior of the discharge vessel (15) by dielectric material (21), are alternatingly connected to the two poles (23, 24) of a voltage source (27). In operation, the voltage source (27) supplies a series of voltage pulses separated by quiescent periods. According to the invention, this produces inside the discharge vessel (15) a spatial discharge (26) which in the regions between electrodes of different polarity (16, 17; 17, 18; 18, 19; 19, 20) is at a distance from the surface of the inside wall of the discharge vessel (15). Substantial advantages are less stress on the wall of the discharge vessel and greater efficiency in generating radiation.
摘要:
The invention relates to an excimer lamp with a discharge chamber which holds a halogen-containing filling gas forming excimers under discharge conditions. Known excimer lamps have only a short burning life. In order to provide an excimer lamp with a long burning life, it is proposed according to the invention that the halogen content of the discharge chamber be a minimum of 1.times.10.sup.-10 mol/cm.sup.3 volume of the discharge chamber per cm.sup.2 of the discharge chamber interior surface area. To manufacture such a long-life excimer lamp, the interior surfaces of the discharge chamber may be treated with a halogen-containing passivating gas prior to filling in the filling gas or the required amount of halogen can be included in the filing gas. The burning life of excimer lamps can also be extended by releasing halogen into a chamber in which it has become depleted, by exposing the discharge chamber to infrared radiation to release halogen taken up by the walls or by releasing halogen from a halogen reservoir disposed in the discharge chamber. In a device according to the invention suitable for extending the burning life of excimer lamps, at least one infrared lamp is provided which is disposed adjacent to the excimer lamp in such a manner that the infrared radiation emanating from the infrared lamp heats the discharge chamber.
摘要:
An electrodeless fluorescent lamp having a lamp envelope with an inner phosphor coating and containing a fill capable of sustaining a discharge when suitably excited by an electric field includes an electrically conductive coating on the exterior of the lamp envelope. The electrically conductive coating is also light transmissive and is effective for confining the electric field to within the lamp envelope.
摘要:
A light source device in which the radiated light from the dielectric barrier discharge lamp can always be stabilized even if the discharge vessel of the dielectric barrier discharge lamp is large or the load on the tube wall within the discharge vessel is small. This is achieved according to the invention by the provision of a light source device having a discharge lamp which has a generally cylindrical, coaxial double-tube arrangement of an outer tube and an inner tube, in which there is an outer electrode on the outer tube, in which there is an inner electrode on the inner tube, and in which a discharge space between the inner and outer tubes is filled with a discharge gas for formation of excimer molecules by a dielectric barrier discharge, and of a power source for operating this discharge lamp in accordance with the relationship: Vs/Vp.ltoreq.0.5 where Vs is the starting voltage and Vp is the voltage applied to the discharge lamp during steady-state luminous operation.
摘要:
A dielectric barrier discharge lamp having a generally cylindrical double-tube arrangement of an outer tube coaxially disposed about an inner tube, with an outer electrode disposed on an outside surface of the outer tube, an inner electrode disposed on an inside surface of the inner tube, and a discharge space provided between the outer tube and the inner tube which is filled with a discharge gas for formation of excimer molecules by dielectric barrier discharge achieves firm engagement of the inner electrode against the inner tube and a stable discharge over a long time even if part of the electrode corrodes due to the ozone produced or it wears. This is achieved by embodiments in which the inner electrode is a generally tubular part which is slit in an axial direction along the full length thereof. The tubular part can be a single cylindrically sheet having opposite longitudinally extending edges spaced from each other by a gap or overlapped. Alternatively, the tubular part can be formed of a pair of substantially semi-cylindrical parts which are separated by a gap between each pair of longitudinally extending edges.
摘要:
A method to operate an incoherently emitting radiation source, in particular a discharge lamp, which transmits UV, IR or VIS radiation. The discharge is generated by means of a train of voltage pulses, interrupted by idle times, inside a discharge vessel; electrodes dielectrically impaired on one or both ends can be used. By a suitable choice of the filling, the electrode configuration, the sparking distance, the type and thickness of the dielectrics, the time-dependent voltage amplitudes, and the pulse and idle times, efficiencies in UV generation of 65% and more are attained.