Display driving device and display device including the same
The present disclosure discloses a display driving device and a display device including the same, which allow transmission data to be converted into a completely random code sequence. The display device may scramble transmission data into a pseudo-random binary sequence (PRBS) using a linear feedback shift register (LFSR), and may change a seed value of the LFSR every time the scrambling is performed.
1. A display device comprising:
a timing controller configured to scramble transmission data into a pseudo-random-binary sequence (PRBS) using a linear feedback shift register (LFSR), include the PRBS in a communication signal, and transmit the communication signal; and
a source driver configured to receive the communication signal, descramble the PRBS included in the communication signal to the transmission data, and drive a display panel using the transmission data,
wherein the timing controller changes a seed value of the LFSR in a scramble reset, and
the timing controller changes the seed value at least one interval of a frame interval and a horizontal line interval.
2. The display device of claim 1 , wherein the timing controller periodically changes the seed value.
3. The display device of claim 1 , wherein the timing controller changes the seed value using at least one of a control data packet, image data, and a data checksum.
4. The display device of claim 1 , wherein the timing controller calculates a value of the transmission data, which is input to the LFSR, and state values of previous transmission data by a linear function to scramble the transmission data.
5. The display device of claim 1 , wherein the source driver receives a scramble reset signal in a blank link training period.
6. The display device of claim 5 , wherein, when the scramble reset signal is activated, the source driver descrambles the PRBS using at least one of a control data packet, image data, and a data checksum input as transmission data of a previous horizontal line.
7. The display device of claim 1 , wherein the timing controller performs a scramble reset at regular intervals, and changes the seed value using at least one of a control data packet, image data, and a data checksum transmitted as the transmission data in the scramble reset.
8. A display driving device comprising at least one source driver configured to receive a communication signal including a pseudo-random-binary sequence (PRBS) obtained by scrambling transmission data using a linear feedback shift register (LFSR), descramble the PRBS to the transmission data, and drive a display panel using the transmission data,
wherein a seed value of the LFSR is set to be changed in a scramble reset, and
the source driver checks the seed value of the LFSR in descrambling and descrambles the PRBS to the transmission data using the seed value, and
the source driver receives the scramble reset signal at least one interval of a frame interval and a horizontal line interval.
9. The display driving device of claim 8 , wherein the source driver receives a scramble reset signal in a blank link training period.
10. The display driving device of claim 9 , wherein the source driver receives the scramble reset signal at regular intervals.
11. The display driving device of claim 10 , wherein, when the scramble reset signal is activated, the source driver descrambles the PRBS using at least one of a control data packet, image data, and a data checksum transmitted as transmission data of a previous frame or previous horizontal line.