Patent ID: 8890878

Claim:
An operation terminal for remotely operating an electronic apparatus comprising: a processing unit configured to remotely communicate with said electronic apparatus in accordance with an operation specified by a program; a memory on which said processing unit performs writing or reading of data; a nonvolatile memory configured to store a basic screen image drawing command for drawing a basic screen image that is displayed before said operation terminal is operated; a drawing processor configured to create a bitmapped image of said basic screen image in accordance with said basic screen image drawing command; a display unit configured to display said bitmapped image on a screen; and an operation button configured to accept a pressing-down operation and output a signal indicating that operation, wherein, upon receiving said signal indicating that said operation button has been pressed down, said processing unit writes a difference drawing command for drawing a difference between an operation screen image that is displayed while said operation terminal is operated and said basic screen image into said memory, and wherein after reading out said basic screen image drawing command from said nonvolatile memory and creating said bitmapped image of said basic screen image, said drawing processor reads out said difference drawing command from said memory, creates a bitmapped image of said difference, and writes over said bitmapped image of said basic screen image.