Optical sheet, backlight unit using the same and producing method of the optical sheet
A technology of light diffusing sheet and back surface, applied in the field of optical sheet, can solve the problems of insufficient prevention of damage and agglomeration, and achieve the effects of excellent adhesion prevention performance, easy handling, and excellent damage prevention performance.
Active Publication Date: 2015-03-25
KEIWA INCORPORATED
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Problems solved by technology
This anti-adhesion layer 48 is used to prevent the following problems from occurring: interference fringes are generated due to the back surface of the light diffusion sheet 44 being in close contact with the surface of other optical sheets (light guide plate 42), that is, adhesion, or in the manufacturing process. Clumping (sticking) occurs when rolled into a cylinder and stored
[0009] However, even in the optical sheet provided with the above-mentioned damage prevention layer, since there are still fine beads for preventing adhesion, it is not possible to sufficiently prevent damage to other optical sheets, etc.
Method used
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Embodiment approach
[0091] The optical sheet of the present invention is not limited to the above-described embodiments, and may be the following embodiments.
[0092] figure 2 The optical sheet 11 is a so-called light diffusion sheet, and the optical sheet 11 includes a sheet main body 2 and a plurality of fibers 3 protruding from the back of the sheet main body 2 . The sheet body 2 includes a base material layer 4 and an optical layer 5 laminated on the surface of the base material layer 4 . Base material layer 4, optical layer 5, binder 7, light diffusing agent 8, manufacturing method, binder and material of fiber 3 etc. figure 1 The same as the optical sheet 1, so the same reference numerals are used and descriptions are omitted.
[0093] A plurality of fibers 3 protrude from the back surface of the sheet main body 2 through a plurality of adhesive parts 16 attached in scattered dots. The adhesive portion 16 is a portion where an adhesive is attached in dispersed dots (island shape) on t...
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Abstract
The invention aims to provide an optical sheet which can prevent damage of other components in overlapping arrangement, a backlight unit using the optical sheet and a producing method of the optical sheet. The optical sheet comprises a sheet body having an optical function, and a plurality of fibres which are protrudingly disposed at one side of the rear face of the sheet body. The sheet body and the plurality of fibres can be connected through an adhesive part which can be laminated on the rear face of the sheet body. The plurality of fibres can be protrudingly disposed at one side of the rear face of the sheet body through an electrostatic flocking processing method.
Description
technical field [0001] The present invention relates to an optical sheet, a backlight unit using the optical sheet, and a method for manufacturing the optical sheet. Background technique [0002] Liquid crystal display devices are widely used as screen display devices such as televisions and computers. Liquid crystal display devices are mainly divided into two types: a direct-view type for viewing a display screen directly and a projection type for viewing a projected image on a screen. Direct-view liquid crystal display devices include a transmissive type that transmits light from a backlight, a reflective type that uses natural light and reflected light from indoor lights without a backlight, and a semi-transmissive type that is a reflective type in bright places and a transmissive type in dark places. type. On the other hand, projection-type liquid crystal display devices include a front projection type that projects an image on the front of a screen, and a rear projecti...
Claims
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IPC IPC(8): G02F1/13357F21V5/08F21S8/00
CPCC09K11/02G02B5/0226G02F1/133606
Inventor 辻孝弘
Owner KEIWA INCORPORATED