Patent ID: 11968480
Assignee: SEIKO EPSON CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. A display system comprising:
a pointer having an on operation button;
a detection device configured to detect a write operation on a display surface by the pointer and determine whether the on operation button is pressed or not; and
a display device
configured to display a first image corresponding to the write operation on the display surface, when the write operation is detected and it is determined that the on operation button is pressed such that pressing the on operation button is configured with a display function,
configured to erase the first image when it is determined that the on operation button is cancelled, and
configured to change the first image to a second image corresponding to the write operation on the display surface when it is determined that the on operation button was previously pressed and the predetermined time has passed without the on operation button cancelled;
configured to display the second image corresponding to the write operation on the display surface, when the write operation is detected and it is determined that the on operation button is not pressed.