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Use LED to make the backlight source of LCD to have many excellences, such as slight weight, thin thickness, reduction the electricity,no radiation、no mercury,long life, etc.. It is the mainstream of the display under 20 inches in the future. It can be apply to the LCD of 3C products extensively, such as the notebook ,digital camera, mobile phone, ViewCAM, etc..
This thesis, we develop dot pattern on the light guide plate to scatter, in order to improve brightness of panel , with increasing out the homogeneity of the luminance of the panel, however we divide dot pattern into two parts: (1)Density does not have regular but size have regular (2)Size does not have regular but density have regular.
We make use of optics software ASAP to design module, to simulate and analysis it, We use white light LED as the light source, and adopt the sidelight type structure, LGP is the associations of the form of two wedge templates, The baseplate of LGP spread dot pattern, and we change density of dot pattern, The result shows that over 85％ uniformity of best brightness and LED light source efficiency of utilization up to 70% .
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