Composite prismatic lens

Abstract

The invention discloses a composite prismatic lens, which comprises a lower substrate layer, wherein a lower prism layer is arranged on the lower substrate layer; an adhesive layer is arranged on the lower prism layer; an upper substrate layer is arranged on the adhesive layer, and an upper prism layer is arranged on the upper substrate layer; both the upper prism layer and the lower prism layer comprise multiple lines of triangular prisms and multiple lines of half-cylinders, the triangular prisms and the half-cylinders are alternately distributed and are connected at the lower ends, and the corners of the triangular prisms are provided with arc surfaces; the triangular prisms of the upper prism layer correspond to the half-cylinders of the lower prism layer, and the half-cylinders of the upper prism layer correspond to the triangular prisms of the lower prism layer; the lower substrate layer is 200-300 microns thick, the upper prism layer and the lower prism layer are 30-80 microns thick, and the thickness of the adhesive layer is 10%-30% of that of the upper prism layer. The composite prismatic lens disclosed by the invention integrates functions of two prismatic lenses, has an excellent optical effect, and is capable of effectively improving the brightness and light uniformity of a backlight module and the yield of the backlight module.

Description

technical field [0001] The invention relates to a prism sheet. Background technique [0002] Recently, various flat panel display devices (Flat Panel Display, FPD) have been developed, and among them, liquid crystal display devices (Liquid Crystal Display, LCD) use liquid crystal light transmittance that changes according to an applied voltage, and various devices are Electronic devices that convert various electrical signals generated into visual information and transmit them. [0003] Since the liquid crystal display device is a light-receiving device without its own light source, a separate light source device that can illuminate the entire screen composed of the liquid crystal display from behind is required. The aforementioned illuminating device for a liquid crystal display device is called a backlight module (Back Light Unit, BLU). [0004] In liquid crystal displays, the backlight module plays a role in providing a uniform surface light source. The backlig...

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Problems solved by technology

[0006] In order to solve the mutual movement and friction between the diaphragms of the existing backlight module, causing mutual scratches between the diaphragms, or mixing dust or debris between the diaphragms during cutting or assembly, making the production and assembly of the backlight module The phenomenon that the qualified rate decreases, the present invention provides a composite prism sheet that integrates the functions of two prism sheets, which can effectively improve the brightness of the backlight module and the uniformity of light, and improve the group yield of the backlight module

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