IMAGE DISPLAY APPARATUS

PROBLEM TO BE SOLVED: To provide an image display apparatus using a side light type surface light emission panel as a backlight, wherein a light source side dark part in an oblique visual angle is not generated even when frame narrowing is promoted. SOLUTION: When a total reflection angle of a light...

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Bibliographische Detailangaben
1. Verfasser:	KANEMITSU SATOSHI
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 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 LABELS OR NAME-PLATES LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS 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 an image display apparatus using a side light type surface light emission panel as a backlight, wherein a light source side dark part in an oblique visual angle is not generated even when frame narrowing is promoted. SOLUTION: When a total reflection angle of a light guide plate 4 to an air layer is defined as θ, a ratio (A/B) of a distance A from a light incident surface 4a opposed to a cold cathode tube 5 of the light guide plate 4 to a position corresponding to an edge of a display region Dd of a liquid crystal display to the thickness B of the light guide plate 4 is specified to be (A/B)≤tanθ to promote the frame narrowing of the liquid crystal display and further the light incident surface 4a is formed in a fine rugged surface shape to disperse going directions of light made incident in the light guide plate 4. Thus, the light source side dark part in the oblique visual angle generated by promoting the frame narrowing is canceled and satisfactory display quality is obtained. COPYRIGHT: (C)2006,JPO&NCIPI