| Summary: | 碩士 === 國立彰化師範大學 === 電機工程學系 === 100 === Abstract
Compared with tranditional keyboards without backlight, keyboards with backlight are more suitable for some special environment where the light is too weak to find correct key on the keyboard. In this thesis, a keyboard with backlight is proposed which is based on the main fram of a traditional keyboard. A light guide plate (LGP) with eight light-emitting diodes (LED) is integrated into the traditional keyboard as the lighting source. Therefore, a redesigning cost of a keyboard can be reduced. The testing software Keyboard Test v3.0 by PassMark is adopted to check the functions of a keyboard. From the eye diagrams, the operator can easily and obviously find out if all the testing parameters are passed. The testing method of electrical characteristics proposed in this thesis can detect if the response rate meets the communication between the keyboard and the PC. Within this condition, both backlight and non-backlight keyboard can be manufactured on the original operation line, which saves labor cost of additional training for operators.
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