Optical-sheet supporting structure, lighting device and display device
AssigneeSharp Kabushiki Kaisha
InventorYasunari HISADA
Life of this patent
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Abstract
In a backlight device, a diffuser plate and a plurality of optical sheets are disposed above a base tray that includes a plurality of cold-cathode tubes therein. The diffuser plate is sandwiched in between a base member, which holds the bottom surface thereof, and a facing portion of an inner frame disposed on the top surface side thereof. A holding protrusion is arranged on the facing portion so as to abut on an exposed portion located on the periphery of the diffuser plate. According to this construction, even when the backlight device is used in an upright orientation, the diffuser plate can be prevented from leaning forward, and thereby pressure applied on the optical sheets can be prevented.
Claims1
An optical-sheet supporting structure comprising:
- a flat light guide plate;
- an optical sheet having a smaller thickness and placed on said light guide plate so that an exposed portion is left on a periphery thereof;
- a base-side panel support that abuts on the periphery of said light guide plate so as to hold said light guide plate;
- a holding-side panel support, which includes a facing portion positioned on an opposite side of said base-side panel support so as to hold the periphery of said light guide plate and said optical sheet in cooperation with said base-side panel support and therebetween, said holding-side panel support having a substantially frame-shaped configuration as a whole;
- and
- at least two posture retaining portions arranged to retain a posture of said facing portion so that said facing portion extends along a surface of said optical sheet.
Dependencies are inferred from the claim text.