SURFACE TYPE LIGHT SOURCE DEVICE

PROBLEM TO BE SOLVED: To provide a surface type light source device which can obtain uniformity of light emission on a screen although the light source device is equipped with a resin substrate which is sectioned in a wedgelike shape and can be provided with a light scattering part by using a method...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI SHINGO, SASADA SHUJI
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING BLASTING 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 FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LABELS OR NAME-PLATES LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a surface type light source device which can obtain uniformity of light emission on a screen although the light source device is equipped with a resin substrate which is sectioned in a wedgelike shape and can be provided with a light scattering part by using a method of high mass- productivity. SOLUTION: The light scattering part 7 which is uniform in area density is formed on the reverse surface of the resin substrate 2 which is sectioned almost in a wedgelike shape. At this time, light which travels in the resin substrate 2 increases in the quantity of emission to the screen with the distance from a light source lamp 1 because of the wedgelike cross sectional shape of the resin substrate 2 as the angle θ of incidence on the border surface of the resin substrate 2 varies. Therefore, even when the position on the reverse surface 4 of the resin substrate 2 slightly shifts, its influence is small, so the light scattering part 7 can be provided by a method of mass-productivity.