Display and operating method thereof

Abstract

A display and an operating method thereof are provided. The display includes a display panel, a timing controller, and a plurality of source drivers. The timing controller has a plurality of signal output terminals. The source drivers are coupled to the timing controller and the display panel. The timing controller outputs a plurality of training packets to the source drivers. When the source drivers lock a clock of the timing controller according to the training packets, the timing controller outputs a plurality of control packets and a plurality of color data packets to the source drivers. The source drivers respectively output a plurality of pixel voltages corresponding to the color data packets to the display panel according to the corresponding control packets. The training packets, the control packets, and the color data packets are serially transmitted to the source drivers via the signal output terminals.

What is claimed is: 
     
       1. A display comprising:
 a display panel; 
 a timing controller having a plurality of signal output terminals; and 
 a plurality of source drivers coupled to the timing controller and the display panel, 
 wherein the timing controller outputs a plurality of training packets to the source drivers, when the source drivers lock a clock of the timing controller based on the training packets, the timing controller outputs a first start signal packet, a plurality of control packets, a second start signal packet, and a plurality of color data packets in order to the source drivers, and the source drivers respectively output a plurality of pixel voltages corresponding to the color data packets to drive the display panel based on the color data packets and the corresponding control packets, the training packets, the control packets, and the color data packets being serially transmitted by a differential signal to the source drivers via the signal output terminals, the differential signal is outputted through a first signal output terminal and a second signal output terminal of the signal output terminals, the first start signal packet informs the source drivers of starting transmission of the control packets, the control packets set an operational mode or parameters of the source drivers, the second start signal packet informs the source drivers of starting transmission of the color data packets, and the color data packets set pixel voltages provided by the source drivers providing to the display panel, 
 when the clock of the timing controller is not locked, each of the source drivers pulls down voltage levels of the corresponding first signal output terminal and the corresponding second signal output terminal to a predetermined voltage for a first period of time at the same time, and the predetermined voltage is lower than a threshold voltage, 
 wherein the predetermined voltage is a ground voltage, and each of the source drivers comprises: 
 a first switch, a first end of the first switch being coupled to between the first signal output terminal, a second end of the first switch being coupled to and the predetermined voltage, a control end of the first switch and receiving a lock signal; and 
 a second switch, a first end of the second switch being coupled to between the second signal output terminal, a second end of the second switch being coupled to and the predetermined voltage, a control end of the second switch and receiving the lock signal, 
 wherein the lock signal is enabled when the clock of the timing controller is not locked, and the lock signal is disabled when the clock of the timing controller is locked. 
 
     
     
       2. The display as recited in  claim 1 , wherein the first period of time is greater than or equal to 350 nano-seconds. 
     
     
       3. The display as recited in  claim 1 , wherein the timing controller detects a common mode voltage of the differential signal, and the timing controller determines that a voltage level of the first signal output terminal and a voltage level of the second signal output terminal are pulled down to the predetermined voltage when the common mode voltage is the predetermined voltage. 
     
     
       4. The display as recited in  claim 1 , wherein the timing controller detects a first current and a second current at the first signal output terminal and the second signal output terminal, and the timing controller determines that a voltage level of the first signal output terminal and a voltage level of the second signal output terminal are pulled down to the predetermined voltage when one of the first current and the second current is zero. 
     
     
       5. The display as recited in  claim 1 , wherein the timing controller detects a third current output to a ground point by a differential signal generating circuit outputting the differential signal, and the timing controller determines that a voltage level of the first signal output terminal and a voltage level of the second signal output terminal are pulled down to the predetermined voltage when the third current is zero. 
     
     
       6. The display as recited in  claim 1 , wherein the timing controller outputs the training packets to the source drivers for a second period of time when one of the source drivers does not lock the clock of the timing controller. 
     
     
       7. The display as recited in claim  1  6, wherein the second period of time is greater than or equal to 1500 times a packet time, and the packet time is a time period required for transmitting one of the training packets, the control packets, or the color data packets. 
     
     
       8. The display as recited in  claim 1 , wherein each of the control packets comprises two start bits, two end bits, and a control code located between the start bits and the end bits. 
     
     
       9. The display as recited in  claim 8 , wherein the start bits respectively correspond to a logic high level, and the end bits respectively corresponding to a logic low level. 
     
     
       10. The display as recited in  claim 1 , wherein each of the color data packets comprises two start bits, two end bits, and a color data code located between the start bits and the end bits. 
     
     
       11. The display as recited in  claim 10 , wherein the color data code corresponds to two of red color data, green color data, and blue color data. 
     
     
       12. The display as recited in  claim 10 , wherein the color data code corresponds to one of red color data, green color data, and blue color data. 
     
     
       13. The display as recited in  claim 10 , wherein the start bits respectively correspond to a logic high level, and the end bits respectively corresponding to a logic low level. 
     
     
       14. The display as recited in  claim 1 , wherein each of the training packets comprises two start bits, two end bits, a first clock code, and a second clock code, the first clock code is located between the start bits and the second clock code, and the second clock code is located between the first clock code and the end bits. 
     
     
       15. The display as recited in  claim 14 , wherein the start bits and a plurality of bits of the first clock code respectively correspond to a logic high level, and the end bits and a plurality of bits of the second clock code respectively correspond to a logic low level. 
     
     
       16. The display as recited in  claim 1 , wherein the source drivers lock the clock of the timing controller based on phase comparison. 
     
     
       17. An operating method of a display, the display comprising a timing controller and a plurality of source drivers, the operating method comprising:
 outputting a plurality of training packets to the source drivers by using the timing controller; 
 outputting a first start signal packet, a plurality of control packets, a second start signal packet, and a plurality of color data packets in order to the source drivers by using the timing controller when the source drivers lock in response to a clock of the timing controller being locked according to the training packets, wherein the first start signal packet informs the source drivers of starting transmission of the control packets, the control packets set an operational mode or parameters of the source drivers, the second start signal packet informs the source drivers of starting transmission of the color data packets, and the color data packets set pixel voltages provided by the source drivers providing to the display panel; 
 respectively outputting a plurality of pixel voltages corresponding to the color data packetsdriving the display panel according to the color data packets and the control packets by using the source drivers, wherein the training packets, the control packets, and the color data packets are serially transmitted by a differential signal to the source drivers, and the differential signal is outputted through a first signal output terminal and a second signal output terminal; and 
 whenin response to the clock of the timing controller is not being locked, each of the source drivers pulls down voltage levels of the corresponding first signal output terminal and the corresponding second signal output terminal to a predetermined voltage for a first period of time at the same time, and the predetermined voltage is lower than a threshold voltage, wherein the predetermined voltage is a ground voltage. 
 
     
     
       18. The operating method as recited in  claim 17 , wherein the first period of time is greater than or equal to 350 nanoseconds. 
     
     
       19. The operating method as recited in  claim 18 , wherein the timing controller outputs the training packets to the source drivers for a second period of time when one of the source drivers does not lock the clock of the timing controller. 
     
     
       20. The operating method as recited in  claim 19 , wherein the second period of time is greater than or equal to 1500 times a packet time, and the packet time is a time period required for transmitting one of the training packets, the control packets, or the color data packets.