Grating Light Modulator (GLM) based on Micro-Electro-Mechanical Systems (MEMS) is applied in projection display. In order to discuss the influence of crosstalk on the GLM driven by passive matrix

operation principle of GLM is presented

and electrics model of passive matrix addressing GLM is established. According to Kirchhoff’s Current Law(KCL) and Kirchhoff’s Voltage Law(KVL)

passive matrix addressing for the device is analyzed and simplified. The voltage relationship between half-select pixel

non-select pixel and total-select pixel is achieved. It’s indicated that half-select pixel is influenced greatly by crosstalk

and crosstalk is more serious by increasing the array. The relationship between the ±1 order diffractive intensity of those three kinds of pixels and driving voltage of total-select pixel respectively is gained by the experiment. The result of the experiment shows that the voltage of half-select pixel is approximately half of the voltage of total-select pixel

and is much larger than the voltage of non-select pixel. The result validates the correctness of the theory. It is proved that active matrix addressing is the optimal method for restraining crosstalk.