PHOTOCONDUCTOR FOR PLANE ILLUMINATION DEVICE

PURPOSE:To improve the incidence efficiency of light and make the light projection surface bright by providing the photoconductor so that the area of the light incidence end surface of a light incidence member united with a light guide plate is larger than the sectional area of a light guide end pla...

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Bibliographische Detailangaben
Hauptverfasser:	YASUNORI YUKIO, YAMAMOTO KAZUMITSU, OTSUKA YOSHIYASU
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY DISPLAYING EDUCATION FREQUENCY-CHANGING LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the incidence efficiency of light and make the light projection surface bright by providing the photoconductor so that the area of the light incidence end surface of a light incidence member united with a light guide plate is larger than the sectional area of a light guide end plate provided at a position parallel to the light incidence end surface. CONSTITUTION:The light incidence member 4 is provided integrally with the light guide plate 3 so that the light from a light source is made incident efficiently. The light incidence member 4 is so provided that the area of the light incidence end surface facing the light source 1 is larger than the sectional area of the light guide plate 3 at the position parallel to the light incidence end surface. Namely, the thickness of the sectional shape of the light incidence member 4 in a plane crossing the light incidence end surface at right angles is maximum on the side of the light incidence end surface, decreased gradually toward the side of the light guide plate 3, and equal to the light guide plate 3 where it is connected to the light guide plate 3. For example, injection molding is so performed that the end part of the light incidence member 4 spreads in a projection shape.