Patent ID: 8312156

Claim:
A communication method control system comprising: a writing apparatus that applies an external writing force to a display retaining medium so as to write an image on the display retaining medium on which (i) the image continues to be displayed after halting application of the external writing force and (ii) the image is changed or erased according to an application of another external writing force; and a control apparatus that controls communication methods employed by the writing apparatus, wherein the writing apparatus is configured to communicate via any of the communication methods, the writing apparatus includes: a transmission unit that transmits information to a different apparatus; a reception unit that receives instruction information supplied by the control apparatus; and a selector that selects one of the communication methods based on the received instruction information, available for the transmission unit transmitting the information, wherein the control apparatus includes a storage unit, that stores (i) identification information and (ii) communication method information indicating at least one of available communication methods, in association with each other, a detector that detects the identification information relating to the writing apparatus transmitting the information, and a controller that controls to transmit, to the writing apparatus, based on the communication method information associated with the detected identification information, the instruction information relating to at least one of the communication methods available for the transmission unit transmitting the information.