Patent ID: 8872805

Claim:
A handwriting data generating system comprising: a handwriting device that is used to handwrite information on a display surface on which an image is displayed, the handwriting device including a battery and being pressed against the display surface when being used to handwrite information; and a handwriting data generating device that generates handwriting data for displaying handwriting of the handwritten information in a first display format on the display surface, wherein the handwriting device includes a signal transmitting unit that transmits a change signal indicating a remaining level of the battery to the handwriting data generating device, and the handwriting data generating device includes: a handwriting data generating unit that generates the handwriting data; and a handwriting data changing unit that changes a first portion of the handwriting data so as to display the handwriting that is associated with the first portion on the display surface in a second display format different from the first display format depending on the remaining level of the battery and the received change signal, the first portion beginning upon receipt of the change signal from the handwriting device indicating a decreased remaining level of the battery, wherein the handwriting data generating device further includes a cancel signal generating unit that outputs a cancel signal to the handwriting data changing unit when the handwriting device is separated from the display surface, and the handwriting data changing unit changes the first portion to the first display format in response to the cancel signal, and changes a second portion of subsequent handwriting data so as to display the handwriting that is associated with the second portion on the display surface in the second display format when the change signal continues to indicate the decreased remaining level of the battery, the second portion beginning when the handwriting device is pressed against the display surface again after being separated from the display surface while the first portion continues to be displayed in the first display format.