Memory protection device and method and organic light emitting display device including the same

An organic light emitting display device comprising:

• a display panel;
• a memory that stores state information of the display panel;
• and
• a memory protection device that protects the state information stored in the memory,
• wherein the memory protection device comprises:
• a transmission circuit that processes transmission data including the state information of the display panel to generate original data in compliance with a transmission interface standard;
• an encoding circuit connected to an output terminal of the transmission circuit that modulates a portion of the original data so as to be different from an original value to generate encoding data;
• an input/output controller that writes the encoding data into the memory according to the transmission interface standard;
• a decoding circuit inversely modulating encoding data read out from the memory by the input/output controller to generate decoding data which is the same as the original data;
• a reception circuit processing the decoding data to generate reception data which is the same as the transmission data;
• and
• a logic circuit calculating a difference value between transmission data of an Nth (N is a positive integer) frame and reception data of an (N−1)th frame and modulating an input digital video data on the basis of a compensation value in accordance with the difference value, and generating a modulated digital video data to be input to the display panel,
• wherein the transmission data of the Nth frame and the reception data of (N−1)th frame are sensing data obtained from the display panel, and
• wherein the input digital video data and the modulated digital video data have the same bits.

A memory protection method for protecting information stored in a memory, the memory protection method comprising:

• processing transmission data including state information of a display panel to generate original data in compliance with a transmission interface standard;
• modulating a portion of the original data so as to be different from an original value to generate encoding data;
• writing the encoding data into the memory according to the transmission interface standard;
• inversely modulating encoding data read out from the memory to generate decoding data which is the same as the original data;
• processing the decoding data to generate reception data which is the same as the transmission data;
• and
• calculating a difference value between transmission data of an Nth (N is a positive integer) frame and reception data of an (N−1)th frame and modulating an input digital video data on the basis of a compensation value in accordance with the difference value, and generating a modulated digital video data to be input to the display panel
• wherein the transmission data of the Nth frame and the reception data of (N−1)th frame are sensing data obtained from the display panel, and
• wherein the input digital video data and the modulated digital video data have the same bits.