region becomes too short. Therefore, the ionic impurities trapped by the peripheral electrodes have an influence on the image display region. On the other hand, when the peripheral electrodes for trapping the ionic impurities are formed on the outer side of the regions where the dummy pixel electrodes are formed, the ionic impurities inside the image display region may rarely be attracted by the peripheral electrodes.pre-load to be applied to the rolling bearing apparatus is set in the range of 50 to 200 gf.
In the present rolling bearing apparatus, since oil is used as the lubricant and the pre-load is set in the range of 50 to 200 gf, not only the structure of the rolling bearing apparatus can be made simple and inexpensive, but also the level of torque can be decreased and control on variations in the torque can be promoted while reducing the evaporation and scattering of the lubricant, when compared with the conventional rolling bearing apparatus in which grease is used as lubricant and a pre-load is set in the conventional range.
That is, while restricting the deterioration of the bearing apparatus caused by use of the oil as the