Prism Sheet structure of back light module

Abstract

This invention relates to aphototropism module set prism structure, which comprises the following parts: one central area with geometry unit distributed on prism slice near; one circle area of plane structure formed on the edge of prism on both sides of central area. This invention prism is applied in the module set by use of tool to form impact type on down surface of circle area socket.

Description

technical field [0001] The invention relates to a prism sheet, in particular to a prism sheet structure used in a backlight module of a backlight module to reduce light concentration and light leakage at the edge of the prism sheet. Background technique [0002] Nowadays, there is an increasing demand for thinner and lighter notebook computers (computers) and lower cost and price. Therefore, in order to reduce the thickness of the backlight module, the display backlight module of a general notebook computer does not have an upper diffuser structure to meet market demand. , and the structure of the backlight module in a general notebook computer, as shown in Figure 1, has a reflector 10, a lamp unit 11, a plastic frame 12, a reflector 13, a light guide plate 14, A diffusion sheet 15 and a prism sheet 16, wherein due to the effect of the lower diffusion sheet 15, the light directivity after the light is emitted from the diffusion sheet 15 is very poor. For most notebook comput...

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Problems solved by technology

However, due to the lack of the upper diffuser, the prism sheet will have the phenomenon of concentrating light at the edge, which will cause light leakage. In addition to printing on the lower diffuser (which can cover part of the light leakage), the conventional solution is mainly on the back of the LCD glass. Attach black light-shielding tape, some of which are attached to the terminal part, and some are attached to the panel gate side and the reverse gate side to shield the light from the terminal part of the LCD panel and avoid light leakage, as shown in the figure As shown in 3, the attachment position 20 is attached with a black light-shielding tape. Although the light-shielding tape and the lower diffuser are used for printing, there is still a very small part of the light due to the light gathering at the edge of the prism sheet and the refraction angle of the light. Entering into area A, and then forming light leakage, and there will always be gaps when attaching the light-shielding tape, and the manual attachment position cannot be completely and properly attached to cover the light leakage and many other problems.

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