Illuminating unit and display apparatus

Abstract

An illuminating unit includes: a plurality of light sources; a light-guide plate including an end surface disposed to face the plurality of light sources, a first surface that outputs light which is based on incident light from the end surface, and a second surface that faces the first surface and includes a plurality of convex parts; and an optical sheet adhered to side of the second surface of the light-guide plate, with the plurality of convex parts being interposed therebetween. The plurality of convex parts include a plurality of first convex parts disposed in a first region inside the second surface, and one or plurality of second convex parts disposed in at least a portion of a second region on a periphery of the first region inside the second surface.

Description

TECHNICAL FIELD[0001]The present disclosure relates to an illuminating unit, and to a display apparatus that uses the illuminating unit.BACKGROUND ART[0002]In a display apparatus such as a liquid crystal display apparatus, an attempt has been made to perform thinning of each of optical members (e.g., an optical sheet, a light-guide plate, and a light source) that configure a display panel or a backlight, in order to achieve thinning of the entire apparatus. This thinning, however, makes it difficult to maintain rigidity of the entire apparatus. In particular, along with increase in size of the display panel, the rigidity is likely to be insufficient. Accordingly, when the optical members of the backlight are stacked, for example, it is desirable that the optical members be subjected to mutual surface adhesion (i.e., entire surfaces thereof be adhered together).[0003]On the other hand, in a case where the mutual surface adhesion is performed, optical characteristics such as luminance...

AI Technical Summary

Benefits of technology

The patent text describes an illuminating unit and display apparatus that prevent detachment of optical members from each other and maintain optical characteristics. This is achieved by using a plurality of convex parts on the surface of the light-guide plate and optical sheet, which increase adhesion area and reduce stress on the convex parts. The size and density of the convex parts are designed to secure the adhesion area and maintain the luminance distribution of the light outputted from the display. This prevents detachment of the light-guide plate and optical sheet from each other and ensures optimal optical performance.

Problems solved by technology

In a method of the above-listed PTL 1, however, optical members are easily detached from each other, making it difficult to maintain optical characteristics.

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