Press-key backlight light-guiding film and its production method

Abstract

The invention discloses a key backlight light guide film and a manufacturing method thereof. The light guide film mainly comprises a transparent light guide film layer and light guide screen dots which are arranged on the light guide film layer. The light guide film is characterized in that the light guide screen dots are fully distributed in a luminous area of the light guide film layer, and adjacent light guide screen dots are tightly arrayed; the depth of each light guide screen dot is changed according to the distance of the light guide screen dot and a light source on the basis of an optical principle so as to achieve uniform light guide. The manufacturing method comprises the following steps: setting the depth of each light guide screen dot according to the optical principle; preparing a metal mold; and preparing the light guide film adopting a heat pressing or UV pressing mode. The method for preparing the metal mold comprises: adopting laser to etch the screen dots by changing the depth; preparing a mother matrix; and obtaining the metal mold by electrocasting. The light guide film has no specific requirements on the transparency of a transparent area of keys, and solves the problem that a transparent crystal key mobile phone cannot use the light guide film. At the same time, the light guide film can improve the transparency of the mobile phone keys, and increase the energy utilizing rate of the backlight.

Description

technical field [0001] The invention relates to a backlight light guide device, in particular to a light guide film used for keyboard backlight and a manufacturing method thereof. Background technique [0002] At present, keyboards are still widely used on electronic products such as mobile phones, electronic dictionaries, and notebook computers. As consumers demand for thinner, lighter, more energy-efficient, and more convenient electronic products, the button backlights of electronic products have also become the object of attention. [0003] Under the trend of ultra-thin and energy-saving, light guide film products have become the preferred solution for providing backlight for mobile phones and other electronic products. In the Chinese invention patent application CN101034183A, a method for manufacturing a mold core of a light guide film is disclosed, which is applicable to the preparation of such products. In addition, the Chinese utility model patent CN201072075Y disc...

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Problems solved by technology

[0004] The object of the present invention is to provide a light-guiding film with a continuous surface luminous effect, so that when the light-guiding film is used as the backlight of the keys of electronic products such as mobile phones, there is no specific requirement for the transparency of the light-transmitting area of ​​the key, and the solution is solved by transparent crystal keys. The problem of not being able to use the light guide film, while increasing the energy utilization rate of the backlight

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