A two-dimensional array of memory cells may be used to implement a spatial dosimeter. The method includes: receiving a request for video communication; determining whether to perform a blurred processing on a video image of the first user; and if affirmative, performing the blurred processing on the video image of the first user such that a blurred video image of the first user is displayed on a video dialog window of the second user. Further, a cap having an opening member and a valve member is mountable on the container body. The invention also relates to a fluid dispensing device for use with the refill element. The first overlapping pixel pattern is in the first exposure area and connected to the first dummy line pattern.