BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE

The invention discloses a backlight unit (5), which includes a light-shielding member (31) covering a prism sheet (24) and a light diffusion sheet (23). The backlight unit satisfies the relationship given by the following expression (1), where A (mm) represents the length along which the light shiel...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DEJIMA HIROHISA, NAMIKAWA YOSHITADA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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 NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	The invention discloses a backlight unit (5), which includes a light-shielding member (31) covering a prism sheet (24) and a light diffusion sheet (23). The backlight unit satisfies the relationship given by the following expression (1), where A (mm) represents the length along which the light shielding member (31) covers the light diffusion sheet (23) before shrinkage, T (mm) represents the thickness of the prism sheet (24), and S (mm) represents the amount of shrinkage of an end (23a) on the frame (30) side of the light diffusion sheet (23) in the planar direction of the light diffusion sheet (23). The backlight unit also satisfies the relationship given by the following expression (2), where D (mm) represents the distance between the end on the frame side (23a) of the light diffusion sheet (23) before expansion and a frame (30) and E (mm) represents the amount of expansion of the end on the frame side (23a) of the light diffusion sheet (23) in the planar direction of the light diffusion sheet (23). The bac