Method of transmitting signal for indicating opening or shuttering of a shutter in a private image display device

A device for displaying a private image using a public monitor, the device being used together with a shutter device having a reception unit for receiving a shutter opening/closing signal, comprising:

• masking image generating means generating a masking image for a private image;
• means generating image sequence patterns for the private image and the masking image;
• a shutter opening/closing sequence and signal generating unit generating both a shutter opening/closing sequence and a shutter opening/closing signal depending on the image sequence patterns;
• and
• a transmission unit transmitting the shutter opening/closing signal to the reception unit to actually open or close the shutter device in synchronization with the shutter opening/closing sequence corresponding to an image to be displayed on the monitor.

A method of transmitting a shutter opening/closing signal from a device for displaying a private image to a shutter device using a public display, comprising:

• generating a first shutter opening/closing signal when shutter opening/closing status of a shutter opening/closing sequence is varied;
• generating a second shutter opening/closing signal at an arbitrary time point when the shutter opening/closing status of the shutter opening/closing sequence is held;
• transmitting the first and second shutter opening/closing signals to the shutter device;
• and
• opening or closing the shutter device depending on the received shutter opening/closing signals.

A method of transmitting a shutter opening/closing signal from a device for displaying a private image to a shutter device using a public display, comprising:

• generating both a shutter opening/closing signal including a bundle of shutter opening/closing sequence status information and a shutter opening/closing instruction signal for instructing the shutter device to be opened or closed;
• transmitting the shutter opening/closing signal comprised of the bundle of the shutter opening/closing sequence status information obtained for a predetermined period to the shutter device;
• transmitting the shutter opening/closing instruction signal to the shutter device at a shutter opening/closing sequence time point;
• extracting shutter opening/closing sequence status information corresponding to a current time point from the received shutter opening/closing signal comprised of the bundle of the shutter opening/closing sequence status information when receiving the shutter opening/closing instruction signal, and opening or closing the shutter device depending on the shutter opening/closing sequence status information.

A method of transmitting a shutter opening/closing signal between a private image display device including a transmission unit having a timer and a shutter opening/closing sequence and signal generating unit, and a shutter device including a reception unit, comprising:

• synchronizing a shutter opening/closing sequence time point generated by the shutter opening/closing sequence and signal generating unit with a time point of the timer;
• transmitting the shutter opening/closing signal to the transmission unit prior to the shutter opening/closing sequence time point by a predetermined period;
• and
• transmitting the shutter opening/closing signal from the transmission unit to the reception unit at a predetermined time of the timer.

A method of transmitting a shutter opening/closing signal between a private image display device including a transmission unit and a shutter opening/closing sequence and signal generating unit, and a shutter device including a reception unit having a timer, comprising:

• synchronizing a sequence time point of a shutter opening/closing signal generated by the shutter opening/closing sequence and signal generating unit with a time point of the timer;
• transmitting the shutter opening/closing signal to the reception unit through the transmission unit prior to the shutter opening/closing sequence time point by a predetermined period;
• and
• opening or closing the shutter device depending on the received shutter opening/closing signal at a predetermined time point of the timer.