Three-layer combined optical film piece

Abstract

The invention discloses a composite optical membrane which comprises protecting films, optical membrane layers and a shading double-side adhesive tape layer, and the surrounding of the shading double-side adhesive tape layer is an annular stickiness part with the middle forming a transparent part. The invention is characterized in that: the hierarchical structure of the composite optical membrane consists of a first protecting film, the shading double-side adhesive tape layer, a first optical membrane layer, a second optical membrane layer and a second protecting film which are orderly overlapped. The first optical membrane layer is larger than the transparent part but less than the second optical membrane layer; and the surrounding is jointed with the stickiness part. The second optical membrane layer is less than the shading double-side adhesive tape layer, and the surrounding part of the second optical membrane layer exceeding the first optical membrane layer is jointed with the stickiness part of the shading double-side adhesive tape layer. The invention uses the stickiness of the shading double-side adhesive tape layer to directly compound each layer of membrane together by an automatic processing device, which is different from prior complex production process, ensures the more reliable performance of a backlight module and improves the production efficiency.

Description

technical field [0001] The invention relates to an optical element combination, in particular to a component of a backlight module used in a liquid crystal display, that is, a composite optical film. Background technique [0002] With the increasing development of social economy, digital tools such as computers, mobile phones, digital cameras, and video cameras are more widely used. These digital tools are generally equipped with display screens to make human-machine communication easier for users to operate more conveniently. , to bring more convenience to the user's operation. In recent years, most of the display screens of digital tools such as computers, mobile phones, digital cameras, and video cameras use liquid crystal display (Liquid Crystal Display, LCD) panels. A backlight module must be provided under the LCD panel to provide the surface light source required by the LCD panel, so that it can obtain sufficient brightness and contrast, and then realize the display ...

AI Technical Summary

Problems solved by technology

Taking the 2.8-inch TFT backlight as an example, the most difficult part of the process is the lamination of the four films on the front. Press the order of the diffusion film, the lower prism film, the upper prism film, and the black and white film. The operator needs to attach them layer by layer, such as A poor fit of one piece may cause four pieces of diaphragms to be scrapped together, resulting in great waste and loss

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