Keyboard light guide film and manufacturing method thereof

Abstract

The invention aims to provide a keyboard light guide film and a manufacturing method thereof. Even if a thick reflection board is not used or double-sided adhesives enabling the reflection board to adhere to a light leading-in portion are not used, the distance between the light leading-in portion and a light source can be shortened to the maximum, shape deformation or movement of the light leading-in portion can be avoided and the light leading-in efficiency of the light leading-in portion can be further improved. According to the light guide film, a bent shape portion is formed on the light leading-in portion, and therefore the distance between the light source and the light leading-in portion is shortened; the inner portion of the bent shape portion is filled with shape maintaining bodies, and therefore the shape of the bent shape portion is maintained firmly. In addition, the light guide film is manufactured through a manufacturing procedure of a light guide raw sheet, a cutting procedure of the light guide raw sheet and a separating procedure of the light guide raw sheet.

Description

technical field [0001] The present invention relates to a light guide film for a keyboard and a manufacturing method thereof. More specifically, it relates to a mobile terminal such as a mobile phone or an electronic device, which guides light irradiated from an internal light source to the text or graphics on the keypad, so as to improve the quality of the keypad. Light guide film for keyboards with externally set text or graphic brightness. Background technique [0002] In general, devices such as mobile terminals such as mobile phones and electronic instruments are equipped with keys for switching operations or function display portions (hereinafter, simply referred to as display portions) in the key portion. A keyboard on which a switch device is mounted and a printed circuit board are sequentially stacked on the lower portion of the key portion. [0003] In addition, the display part of the key part is designed with various patterns such as numbers, letters, graphics, ...

AI Technical Summary

Problems solved by technology

Therefore, there is a disadvantage that the process time becomes longer due to the very cumbersome work process

In addition, since the reflective plate 8 is an expensive material compared to the reflective tape 7

Therefore, not only workability and productivity decrease due to the attaching process of the reflector 8, but also there is a problem that the manufacturing cost increases due to the increase in labor costs and material costs.

[0009] In addition, the conventional light guide film 4 has a structure in which the light introduction part 4b is supported by the reflective plate 8 attached on both sides, so the arrangement structure of the light introduction part 4b is not firm enough.

Therefore, there is a possibility that the light introduction part 4b may deform or move in the groove part 6a, thereby reducing the light introduction efficiency of the light introduction part 4b.

In addition, since the double-sided adhesive tape 9 for attaching the reflector 8 is mounted between the reflector 8 and the light introduction part 4b, the reflection efficiency of the reflector 8 decreases, which in turn causes the brightness of the display part 3a to decrease. The problem

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