DISPLAY DEVICE

PROBLEM TO BE SOLVED: To prevent increase in the overall thickness and size, in a liquid crystal display device having speaker functions. SOLUTION: A light guide plate 42 of a back light 41 arranged on the reverse surface side of a liquid crystal display panel 31 is structured, by providing a projec...

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Bibliographische Detailangaben
1. Verfasser:	YAMAUCHI SHINGO
Format:	Patent
Sprache:	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 LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent increase in the overall thickness and size, in a liquid crystal display device having speaker functions. SOLUTION: A light guide plate 42 of a back light 41 arranged on the reverse surface side of a liquid crystal display panel 31 is structured, by providing a projection plate type part 42b which is thinner than an optical waveguide body 42a on the top surface side of a specified one-end surface of the optical waveguide body 42a. A piezoelectric element 46 and a light emitting diode 47 are bonded and arranged on the reverse surface of the projection plate type part 42b. Then the optical waveguide plate 42 functions as the diaphragm of a speaker. In this case, since the projection plate type part 42b of the optical waveguide plate 42 is arranged in a region of the liquid crystal display panel 31, corresponding to a projection part 33a of the reverse-surface side substrate 33, the overall thickness and size of the device will not increase. COPYRIGHT: (C)2007,JPO&INPIT