Manufacturing method for shading adhesive tape and backlight module of shading adhesive tape

Abstract

The invention provides a manufacturing method for shading adhesive tape used for a narrow-frame displayer and a backlight module of the shading adhesive tape. The backlight module comprises an LED backlight source, a light guide plate on the side edge of the LED backlight source and a multi-layer optical membrane above the light guide plate. The backlight module further comprises the annular shading adhesive tape, the shading adhesive tape comprises a first adhesive layer, a second adhesive layer and a third adhesive layer, the first adhesive layer is provided with a black adhesive face and located on the same side and the opposite side of the LED backlight source, the second adhesive layer is provided with a white adhesive face, overlapped with the first adhesive layer and located on a clamping lug part of the optical membrane, and the third adhesive layer is provided with a black adhesive face and arranged at the upper end and the lower end of the second adhesive layer. Compared with the prior art, the top bright line and the LED radial phenomena of the narrow-frame displayer are eliminated through the third adhesive layer with the black adhesive face, and an existing clamping lug dark band is avoided through the second adhesive layer with the white adhesive face.

Description

technical field [0001] The invention relates to a display with a narrow frame, in particular to a method for manufacturing a light-shielding adhesive tape used in the display with a narrow frame and a backlight module thereof. Background technique [0002] In recent years, a liquid crystal display device (Liquid Crystal Display, LCD) using a liquid crystal display panel as a display screen has been widely used in various applications due to its advantages of light weight and thin body. In a liquid crystal display panel, a glass substrate on which wiring and electrodes are formed is arranged in parallel to a counter substrate, and liquid crystal is sandwiched between the two substrates. Polarizing plates (for example, an upper polarizer and a lower polarizer) are respectively pasted on two sides of the liquid crystal display panel. The display area of ​​the liquid crystal display panel is composed of many pixels, and a signal corresponding to a display image is applied to ea...

AI Technical Summary

Problems solved by technology

However, B / W blackout tape will bring the problem of top bright line of narrow bezel display and LED ray problem

If B / B light-shielding tape is used, although it can effectively solve the above-mentioned problems of bright lines on the top and LED rays, the black rubber surface will cover the lugs of the optical diaphragm, resulting in obvious dark bands of lugs

As a result, in the prior art, no matter whether you use B / B light-shielding tape or B / W light-shielding tape, it has its own inherent shortcomings in the taste of narrow-frame displays.

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