JPS6326873U - - Google Patents

Description

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

第１図は本考案に係る表示装置の一実施例を示
すケースの斜視図、第２図は同装置の要部拡大断
面図、第３図は凹凸をフレネル状ステツプで構成
した例を示す図、第４図は表示装置の従来例を示
す分解斜視図、第５図は断面図、第６図は光の反
射透過の様子を示す図である。 １……表示装置、２……ケース、３……表示板
、４……光源、５……導光体、６……点刻、７…
…光透過部（表示部）、２０……ケースの内底面
、２１……平滑な反射面、２２……乱反射面、２
５……フレネル状ステツプ。 FIG. 1 is a perspective view of a case showing an embodiment of the display device according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of the device, and FIG. 3 is a diagram showing an example in which the unevenness is composed of Fresnel-like steps. , FIG. 4 is an exploded perspective view showing a conventional example of a display device, FIG. 5 is a sectional view, and FIG. 6 is a diagram showing how light is reflected and transmitted. DESCRIPTION OF SYMBOLS 1... Display device, 2... Case, 3... Display board, 4... Light source, 5... Light guide, 6... Stipple, 7...
...Light transmission part (display part), 20 ... Inner bottom surface of the case, 21 ... Smooth reflective surface, 22 ... Diffuse reflection surface, 2
5... Fresnel step.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ケースと、このケースの開口部に配設された表
示板と、前記ケース内に配設された光源と、前記
表示板の裏面に沿つて配設され前記光源から出た
光を該表示板の表示部に導く導光体とを備え、前
記導光体はその板厚が光源側端より反対側端に向
うにしたがい漸次減少するように変化し、また裏
面には光源から導光体内に入射した光を前記表示
板方向に反射させる点刻が光源から遠のくにした
がつて稠密になるように形成され、前記ケースは
前記導光体の裏面と平行になるように傾斜しかつ
光源近傍部が平滑な反射面を、光源から遠い部分
が細かな凹凸を有する乱反射面を構成することを
特徴とする表示装置。 a case, a display board disposed in the opening of the case, a light source disposed inside the case, and a light source disposed along the back surface of the display board to direct light emitted from the light source to the display board. The light guide has a plate thickness that gradually decreases from the end on the light source side to the opposite end, and the back surface of the light guide has a thickness that gradually decreases from the end on the side of the light source to the end on the opposite side. The dots that reflect the light toward the display panel are formed so that they become denser as they move away from the light source, and the case is inclined so as to be parallel to the back surface of the light guide, and the part near the light source is A display device characterized in that a smooth reflective surface constitutes a diffused reflective surface having fine irregularities in a portion far from a light source.