JPS6455507U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例の断面図、第２図は
同実施例で用いる遮光模様並びに反射率の低い部
材を示した斜視図、第３図は同実施例の拡散板上
の輝度分布を示すグラフ、第４図は従来の照明装
置の断面図、第５図は従来の遮光模様を設けた蛍
光管の斜視図、第６図は従来の遮光板の他の例を
示す平面図、第７図、第８図はいずれも従来の照
明装置の拡散板上での輝度分布を示すグラフであ
る。 １…反射板、２…蛍光管、３…拡散板、４…遮
光模様、５…光吸収シート。 Fig. 1 is a cross-sectional view of an embodiment of the present invention, Fig. 2 is a perspective view showing a light-shielding pattern and members with low reflectance used in the embodiment, and Fig. 3 is the luminance on the diffuser plate of the embodiment. A graph showing the distribution, Fig. 4 is a cross-sectional view of a conventional lighting device, Fig. 5 is a perspective view of a fluorescent tube provided with a conventional light-shielding pattern, and Fig. 6 is a plan view showing another example of a conventional light-shielding plate. , FIG. 7, and FIG. 8 are all graphs showing the luminance distribution on the diffuser plate of a conventional lighting device. 1... Reflection plate, 2... Fluorescent tube, 3... Diffusion plate, 4... Light-shielding pattern, 5... Light-absorbing sheet.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 反射板の上部に直線状の光源を配置しこの直線
状の光源に対して反射板と反対側に拡散板を配置
した照明装置において、前記光源管上面に放射光
量を制御する光量制御手段を設け更に光源管直下
の反射板上に反射率の低い部分を形成するように
したことを特徴とする照明装置。 In a lighting device in which a linear light source is arranged above a reflecting plate and a diffuser plate is arranged on the opposite side of the linear light source to the reflecting plate, a light amount control means for controlling the amount of emitted light is provided on the upper surface of the light source tube. Furthermore, a lighting device characterized in that a portion with low reflectance is formed on the reflection plate directly below the light source tube.