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Lighting device

A technology for lighting appliances and appliances, which is applied to lighting devices, fixed lighting devices, lighting and heating equipment, etc., can solve the problem of identifying uneven brightness of appliances, and achieve the effect of reducing brightness decline and improving efficiency.

Inactive Publication Date: 2009-08-05
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, as far as the above configuration is concerned, it is known that because the half of the lamp cap is opposite to the darker coldest part, the area between the shield sheets is opposite to the other half of the lamp cap adjacent to it and the brighter low pin side. The area between the masking sheets is relatively dark, so the brightness unevenness is more obvious when identifying appliances

Method used

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Embodiment Construction

[0043] refer to Figure 1 to Figure 5 The first embodiment of the present invention will be described.

[0044] figure 1 The symbol 1 in represents the roof of the facility. This facility ceiling 1 interweaves unillustrated ceiling frames into a grid pattern, and on each of the partitioned square-shaped space parts, a ceiling panel 2 having a shape corresponding to the space is mainly installed. The lighting fixture 3 of this embodiment is attached to the part and formed.

[0045] like figure 2 and Figure 4 As shown, the lighting fixture 3 includes a fixture main body 11 , a circular fluorescent lamp 21 , and, for example, a baffle 41 as a light shielding body.

[0046] The appliance main body 11 whose outer shape is quadrangular, for example square, is provided with: a main body frame 12 whose central part is opened in a square shape; a central plate 13 mounted on the main body frame 12 to cover the opening of the central part. On the central plate 13 either as fig...

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Abstract

Provided is a lighting fixture capable of improving the unevenness of brightness in the area between the shading sheets of the shading body caused by the lamp cap. It is provided with: an appliance main body (11); a ring-shaped fluorescent lamp (21) installed on the main body; a shield (41) having a plurality of shielding sheets (44) arranged at intervals, installed on the appliance main body (11), and Lamp 21 is opposite. Install lamp caps (23) across the two ends of the annular bulb (22) on the lamp (21), and compared with the first electrode pin height that is arranged on one end of the bulb (22), make the height of the first electrode pin that is arranged on the bulb (22) (22) The height of the second electrode pin at the other end is larger. The configuration of the shield (41) relative to the lamp (21) is such that, among the shields (44), a shield (44a) opposite to the lamp cap (23) is located close to the center C of the lamp cap (23). 2nd electrode side.

Description

technical field [0001] The present invention relates to a lighting fixture including a ring-shaped fluorescent lamp and a shade facing it. Background technique [0002] In the past, for a lighting fixture configured to have a plurality of light-shielding sheets arranged at intervals, such as a shield of a baffle sheet, arranged opposite to the lamp, the lamp cap of the lamp supported on the lamp socket and the shielding sheet The relative technology of the region between is well known (for example, refer to Patent Document 1.). [0003] In addition, for circular fluorescent lamps, the mercury vapor pressure in the bulb (light-transmitting discharge vessel) is generally limited to an optimum value according to the temperature of the coldest part of the bulb to obtain higher luminous efficiency. For this reason, the following technology is well known (for example, refer to Patent Document 2.), which is to make the height of the first electrode pin (mount) installed at the oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/04F21W131/00F21Y103/02F21Y103/33
Inventor 杉下直树
Owner TOSHIBA LIGHTING & TECH CORP