Display panel apparatus having reduced capacitive coupling

A display panel with a reduced capacitive coupling. The panel includes a transmission type liquid crystal panel. A lamp is provided adjacent at least one side of a light guide plate to guide the light to the crystal panel. A high frequency current supply is used to power the light. A reflective plat...

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Bibliographische Detailangaben
Hauptverfasser:	KAWABE SHIN, UMESAKI MITSUMASA, YUUKI AKIMASA, KUMAGAI TAKASHI, MATSUMOTO SADAYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION 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 LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	A display panel with a reduced capacitive coupling. The panel includes a transmission type liquid crystal panel. A lamp is provided adjacent at least one side of a light guide plate to guide the light to the crystal panel. A high frequency current supply is used to power the light. A reflective plate encircles the lamp so as to introduce the light to the light guide plate. A housing is made of a thin metal plate. Each portion of the housing is connected with a common electrical potential. Part of the housing extends away from the reflective plate around the lamp or contains an opening in the same location. By this arrangement, the capacitance between the reflective plate and the housing is made smaller thus reducing the leakage current.