OPTICAL MEMBER, BACKLIGHT UNIT FOR DISPLAY, AND DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide an optical member which is adaptable to a large and thin display and has excellent optical performance and reliability at low cost.SOLUTION: An optical member is used for a backlight unit for a display. A concavo-convex optical element is formed in a one-dimensional...

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Bibliographische Detailangaben
Hauptverfasser:	IGARASHI YUUKI, HIJIKATA MIKI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING 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 FREQUENCY-CHANGING HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS NON-PORTABLE LIGHTING DEVICES OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SYSTEMS THEREOF TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an optical member which is adaptable to a large and thin display and has excellent optical performance and reliability at low cost.SOLUTION: An optical member is used for a backlight unit for a display. A concavo-convex optical element is formed in a one-dimensional direction or a two-dimensional direction on at least one surface of the optical member, and density distribution of the optical element becomes lower as closer to a light source. Furthermore, a distribution ratio of the optical element at a position closest to the light source is not less than 0.2 but less than 0.8 when the distribution ratio of the optical element at a position farthest from the light source is 1, in which the distribution ratio is defined as a surface area ratio of the optical element with respect to the optical member per unit surface area.