SIGNAL TRANSMISSION METHOD AND APPARATUS, AND DISPLAY DEVICE
The embodiments of the present disclosure provide a signal transmission method and apparatus for a display device, and a display device. The method includes: adjusting a data rate for signal transmission within a blanking time; and performing signal transmission within an active time by using the data rate adjusted within the blanking time; wherein a signal transmission period of the display device includes the blanking time and the active time. Through the method of the present disclosure, the range of data rate used for signal transmission could be significantly expanded, more abundant data rate transmission requirements could be met, Electro Magnetic Interference during signal transmission could be reduced, and the quality of pictures displayed on the display device could be guaranteed.
1 . A signal transmission method for a display device, comprising:
adjusting a data rate for signal transmission within a blanking time; and
performing signal transmission within an active time by using the data rate adjusted within the blanking time;
wherein a signal transmission period of the display device includes the blanking time and the active time.
2 . The signal transmission method according to claim 1 , wherein the signal transmission period is a frame period, the blanking time is a vertical blanking time,
adjusting a data rate for signal transmission within a blanking time comprises: adjusting a data rate for signal transmission within the vertical blanking time,
wherein the adjusted data rate is used for performing signal transmission within at least one frame after the vertical blanking time or used for performing signal transmission within at least one line after the vertical blanking time.
3 . The signal transmission method according to claim 1 , wherein the signal transmission period is a line period, the blanking time is a horizontal blanking time, and
adjusting a data rate for signal transmission within a blanking time comprises: adjusting a data rate for signal transmission within the horizontal blanking time,
wherein the adjusted data rate is used for performing signal transmission within at least one line after the horizontal blanking time.
4 . The signal transmission method according to claim 3 , wherein the line period has a preset time length, and a length of the active time is associated with the adjusted data rate; and
a length of the horizontal blanking time is determined by the line period and the length of the active time.
5 . The signal transmission method according to claim 1 , further comprising:
taking a first number of signal transmission periods as an adjustment cycle period, adjusting the data rate used for signal transmission, such that the data rate changes periodically within the adjustment cycle period,
taking a second number of signal transmission periods as a maintaining time, and performing signal transmission at the same data rate within the maintaining time,
wherein the first number and the second number are integers, and the first number is greater than the second number.
6 . The signal transmission method according to claim 5 , wherein
an amount of data rate change within the adjustment cycle period is less than or equal to a first threshold, and an amount of data rate change between two adjacent data rates is less than or equal to a second threshold, wherein the first threshold is greater than or equal to the second threshold.
7 . The signal transmission method according to claim 6 , wherein
the first threshold is 25% of a reference data rate, and the second threshold is 5% of the reference data rate.
8 . The signal transmission method according to claim 5 , wherein the data rate changes periodically within the adjustment cycle period comprises:
the data rate monotonically increases in a first part of the adjustment cycle period, and
the data rate monotonically decreases in a second part of the adjustment cycle period,
wherein the data rate is lower than a maximum allowable data rate at a receiving end for signal transmission.
9 . The signal transmission method according to claim 8 , wherein
the data rate monotonically increases in a first part of the adjustment cycle period comprises: the data rate monotonically increases at a first step size, and
the data rate monotonically decreases in a second part of the adjustment cycle period comprises: the data rate monotonically decreases at a second step size,
wherein the first step size is the same as or different from the second step size.
10 . The signal transmission method according to claim 1 , wherein
for a plurality of consecutive signal transmission periods of the display device, randomly determining at least one signal transmission period for adjusting the data rate for signal transmission, and
for each signal transmission period of the display device, randomly determining whether to adjust the data rate for signal transmission.
11 . The signal transmission method according to claim 10 , wherein, for each signal transmission period of the display device, in a case where it is determined that the data rate for signal transmission needs to be adjusted,
determining the adjusted data rate base on a current data rate according to a predetermined adjustment rule; or
determining the adjusted data rate randomly.
12 . The signal transmission method according to claim 1 , wherein the signal transmission method is used for a display device based on a point-to-point transmission architecture.
13 . A signal transmission apparatus for a display device, comprising:
a rate adjustment circuit configured to adjust a data rate for signal transmission within a blanking time;
a signal transmission circuit configured to perform signal transmission within an active time by using the data rate adjusted within the blanking time;
wherein the signal transmission period of the display device includes the blanking time and the active time.
14 . The signal transmission apparatus according to claim 13 , wherein the signal transmission period is a frame period, the blanking time is a vertical blanking time, and
the rate adjustment circuit is further configured to adjust the data rate for signal transmission within the vertical blanking time,
wherein the adjusted data rate is used for performing signal transmission within at least one frame after the vertical blanking time or used for performing signal transmission within at least one line after the vertical blanking time.
15 . The signal transmission apparatus according to claim 13 , wherein the signal transmission period is a line period, the blanking time is a horizontal blanking time, and
the rate adjustment circuit is further configured to adjust the data rate for signal transmission within the horizontal blanking time,
wherein the adjusted data rate is used for performing signal transmission within at least one line after the horizontal blanking time.
16 . The signal transmission apparatus according to claim 13 , wherein
the rate adjustment circuit is further configured to
for a plurality of consecutive signal transmission periods of the display device, randomly determine at least one signal transmission period for adjusting the data rate for signal transmission; and
for each signal transmission period of the display device, randomly determine whether to adjust the data rate for signal transmission.
17 . A display device that transmits a display signal through the signal transmission method according to claim 1 .
18 . The display device according to claim 17 , wherein the display device is based on a point-to-point transmission architecture.