TW201508725A - Display system and data transmission method thereof - Google Patents

Abstract

A display system and a data transmission method thereof are provided. When a first frame stored in a frame buffer is identical to a second frame to be output from an audio and video (AV) source, a timing controller outputs a display data corresponding to the fist frame controlled by an AV control signal outputted by the AV source. When the first frame is differed from the second frame, the AV source is set the AV control signal corresponding to a line data update mode and a AV data signal corresponding to at least a line display data of the second frame, and the timing controller determines a writing time point or writing positions for the line display data storing in the frame buffer according the timing sequences of the line display data and the display data, and outputs the display corresponding to the first frame.

Description

Display system and data transmission method thereof

The present invention relates to a display system and a data transfer method thereof, and more particularly to a display system having a picture buffer and a data transfer method thereof.

The display device generally displays the corresponding image according to the screen provided by the video source. However, in the case of displaying a still image, the display device continues to receive the picture transmitted from the video source and displays the same image. In order to reduce the power consumption of the receiving screen when the display device displays the still image, a screen buffer for storing an entire screen can be configured in the display device. In the case of displaying a moving image, the display device can display the corresponding image according to the picture provided by the video source; in the case of displaying the still image, the display device can store the still picture in the picture buffer, and the display device according to the picture The static picture stored in the buffer is displayed.

However, when the video source provides a new still picture, the operation timing of the display device may not be synchronized with the operation timing of the picture source providing picture, so the action of the display device writing the new still picture to the picture buffer and the display device will be stored in painting The display of the static picture of the surface buffer may not be smoothly connected, thereby causing the display device to display an erroneous image. Therefore, how to make a new static picture write to the picture buffer and read the old static picture from the picture buffer can be smoothly connected, which becomes a design focus of this type of display device.

The invention provides a display system and a data transmission method thereof, which determine a time point or a writing position of a line display data written into a picture buffer according to a timing of displaying a line of data and a timing of displaying the data, so as to prevent the display device from displaying an erroneous image.

The display system of the present invention includes a video source and a display device. The audio and video source provides video and audio control signals and video and audio data signals. The display device includes a picture buffer, a timing controller, a display panel, and a driving circuit. The timing controller is coupled to the video source and the picture buffer to receive the video control signal and the video data signal, and output a display data. The driving circuit is coupled to the timing controller and the display panel to drive the display panel according to the display data. When the first picture stored in the picture buffer is the same as the second picture to be output by the video source, the video source corresponds to the self-updating mode to set the video control signal, and the timing controller is controlled to read and store the video control signal in the picture buffer. The first screen displays the data as output. When the first picture stored in the picture buffer is different from the second picture to be output by the video source, the video source corresponding to the line data update mode sets the video control signal and displays the data setting according to at least one line different from the first picture in the second picture. The audio and video data signal, the timing controller is controlled by the video and audio control signal to read the first picture stored in the picture buffer to output the display data and The line display data is stored in the picture buffer, and the timing controller determines the time point or the writing position of the line display data to be written to the picture buffer according to the timing of the line display data and the timing of the display data.

In an embodiment of the invention, the timing controller includes a data multiplexer and a picture controller. The data multiplexer has a first input end, a second input end and a first output end, the first input end is coupled to the audio and video source to receive the audio and video data signal, and the first output end outputs the display data, wherein the data multiplexer is based on The video control signal is coupled to the first output end to the first input end or the second input end. The picture controller is coupled to the video source, the picture buffer, and the second input end of the data multiplexer for transmitting the video data signal to the picture buffer, and transmitting the first picture stored in the picture buffer to the data multiplexer The second input end of the screen controller determines whether the screen buffer reads the corresponding line display data when the line display material is received according to the timing of the line display data and the timing of the display data. When the screen buffer reads the corresponding line display material when the line display material is received, the screen controller writes the line display material to the screen buffer after the end of one screen period corresponding to the line display material. When the line buffer does not read the corresponding line display material when the line display material is received, the picture controller directly writes the line display material to the picture buffer.

In an embodiment of the invention, the picture controller includes a demultiplexer, a multiplexer, a line buffer, and a collision determination unit. The multiplexer has a third input end, a second output end, and a third output end, and the third input end is coupled to the video source to receive the video data signal. The multiplexer has a fourth input end, a fifth input end, and a fourth output end. The fourth input end is coupled to the second output end, and the fourth output end is coupled to the picture buffer. Line buffer The device is coupled between the third output end and the fifth input end. The conflict determination unit is coupled to the video source, the picture buffer, the demultiplexer and the multiplexer, to determine whether the picture buffer is read when the line display data is received according to the timing of the line display data and the timing of the display data. Line display data. When the screen buffer reads the corresponding line display material when the line display material is received, the conflict determination unit controls the demultiplexer to store the line display data in the line buffer, and the conflict determination unit corresponds to the line display data. After the end of the picture period, the multiplexer is controlled to write the above-mentioned line display data stored in the line buffer to the picture buffer. When the line buffer is not received by the screen buffer when the line display material is received, the conflict determination unit controls the demultiplexer and the multiplexer to directly write the line display material into the picture buffer.

In an embodiment of the invention, the timing controller includes a data multiplexer and a picture controller. The data multiplexer has a first input end, a second input end and a first output end, the first input end is coupled to the audio and video source to receive the audio and video data signal, and the first output end outputs the display data, wherein the data multiplexer is controlled according to the audio and video The signal is coupled to the first output end to the first input end or the second input end. The picture controller is coupled to the video source, the picture buffer, and the second input end of the data multiplexer for transmitting the video data signal to the picture buffer, and transmitting the first picture stored in the picture buffer to the data multiplexer The second input end, the screen controller determines, according to the timing of the line display data and the timing of displaying the data, whether the end time point of a first picture period corresponding to the line display data is later than the end of a second picture period of the display material Time point. When the end time point of the first picture period is later than the end time point of the second picture period, the write position of the line display material in the picture buffer is the same as that in the first picture. Show where the data is stored. When the end time point of the first picture period is earlier than or equal to the end time point of the second picture period, the write position of the line display material in the picture buffer is different from the storage position of the corresponding display material in the first picture.

The data transfer method of the display system of the present invention comprises the following steps. When a first picture stored in a picture buffer is the same as a second picture to be outputted by a video source, the video source corresponds to a self-updating mode to set a video control signal, and a timing controller of a display device is controlled by The video control signal reads the first picture stored in the picture buffer to output a display material. When the first picture stored in the picture buffer is different from the second picture to be output by the video source, the video source corresponding to the line data update mode sets the video control signal and displays the data setting according to at least one line different from the first picture in the second picture. The video data signal is controlled by the timing controller to read the first picture stored in the picture buffer to output the display data and store the line display data in the picture buffer, and the timing controller displays the timing of the data according to the line. And the timing of displaying the data determines the time point or write position at which the above-mentioned line display data is written to the picture buffer.

In an embodiment of the present invention, the timing controller determines, according to the timing of the line display data and the timing of displaying the data, the step of writing the line display data to the time point or the writing position of the picture buffer, including: the timing controller according to the foregoing The timing of the line display data and the timing of the display data determine whether the screen buffer reads the corresponding line display data when the line display data is received; when the line display data is received, the screen buffer reads the corresponding line display material, The timing controller writes the line display data to the screen buffer after the end of a screen period corresponding to the line display data; When the line buffer does not read the corresponding line display material when the line display material is received, the timing controller directly writes the line display material into the picture buffer.

In an embodiment of the present invention, the timing controller determines, according to the timing of the line display data and the timing of displaying the data, the step of writing the line display data to the time point or the writing position of the picture buffer, including: the timing controller according to the foregoing The timing of the line display data and the timing of the display data determine whether the end time point of a first picture period corresponding to the line display material is later than the end time point of a second picture period of the display material; when the end time of the first picture period When the point is later than the end time point of the second picture period, the writing position of the line display data in the picture buffer is the same as the storage position of the corresponding display material in the first picture; when the end time of the first picture period is earlier than Or equal to the end time point of the second picture period, the writing position of the line display material in the picture buffer is different from the storage position of the corresponding display material in the first picture.

In an embodiment of the invention, the first picture period and the second picture period correspond to the same picture count value, and the picture count value is incremented by one at a starting point for displaying the data for transmission.

In an embodiment of the invention, the picture buffer has a first memory area and a second memory area. The data transfer method of the display system further includes: when the end time point of the first picture period is later than the end time point of the second picture period and the storage location of the corresponding display material in the line display material in the first picture is located in the first memory area When the line display data is written in the picture buffer in the first memory area; when the end time point of the first picture period is earlier than or equal to the end of the second picture period When the storage time of the corresponding display material in the first screen is in the first memory area, the writing position of the line display data in the picture buffer is located in the second memory area.

In an embodiment of the invention, the timing controller has a write lookup table and a read lookup table, and the timing controller determines the write position of the line display data in the picture buffer according to the write lookup table, and according to the read The lookup table determines the reading position of the picture buffer.

In an embodiment of the invention, the timing controller further has a switching flag to mark whether the end time point of the first picture period is later than the end time point of the second picture period, and the timing controller determines whether the switching flag is used according to the switching flag. Change the above line display data to the corresponding multiple position flags in the write lookup table.

In an embodiment of the invention, when the timing controller receives the line display material, the write lookup table is modified to be the same as the read lookup table, and when the display data starts to be transmitted, the read lookup table is modified to be the same as the write. Enter the lookup table.

Based on the above, in the method for transmitting data of the display system according to the embodiment of the present invention, when the video source source corresponds to the line data update mode, the video control signal is set and the line display data is provided, the timing controller displays the timing of the data according to the at least one line and displays the data. The timing determines the time point or write position at which the at least one line of the display data is written to the picture buffer. Thereby, it is possible to prevent the display device from displaying an erroneous image.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧Display system

110‧‧‧Video source

120, 200, 300‧‧‧ display devices

121, 210, 310‧‧‧ timing controller

123, 320‧‧‧ Picture buffer

125‧‧‧Drive circuit

127‧‧‧ display panel

211‧‧‧Data multiplexer

213, 311‧‧‧ picture controller

221‧‧ ‧ multiplexer

223‧‧‧Multiplexer

225‧‧‧ line buffer

227‧‧ ‧ conflict judgment unit

AVC‧‧‧Video Control Signal

AVD‧‧‧ audio and video data signal

DD‧‧‧Display information

E1‧‧‧ first input

E2‧‧‧ second input

E3‧‧‧ third input

E4‧‧‧ fourth input

E5‧‧‧ fifth input

FD11~FD13, FD21~FD26, FD31, FD32, FD41~FD43‧‧‧ screen

LD11, LD12, LD21, LD22, LD31~LD34, LD41~LD45‧‧‧ line display data

Line_Addr_W[0]~Line_Addr_W[3], Line_Addr_R[0]~Line_Addr_R[3]‧‧‧Location Flag

LUTR‧‧‧Read lookup table

LUTW‧‧‧Write lookup table

O1‧‧‧ first output

O2‧‧‧ second output

O3‧‧‧ third output

O4‧‧‧ fourth output

R0‧‧‧First memory area

R1‧‧‧Second memory area

SW‧‧‧Switch flag

TA1, TA2, TE1, TEA1~TEA4, TS1~TS3‧‧‧ points

S410, S420, S430, S510, S520, S530, S540, S610, S620, S630, S640‧‧ steps

1 is a system diagram of a display system in accordance with an embodiment of the present invention.

2A is a schematic diagram of a system of a display system in accordance with another embodiment of the present invention.

2B is a timing diagram showing the transfer of data by a display system in accordance with an embodiment of the present invention.

3A is a schematic diagram of a system of a display system in accordance with another embodiment of the present invention.

FIG. 3B is a timing diagram of data transmission by a display system according to an embodiment of the invention.

4 is a flow chart of a method of transferring data of a display system in accordance with an embodiment of the present invention.

FIG. 5 is a flow chart of a method for transferring data of a display system according to another embodiment of the present invention.

6 is a flow chart of a method of transferring data of a display system in accordance with still another embodiment of the present invention.

1 is a system diagram of a display system in accordance with an embodiment of the present invention. Referring to FIG. 1 , in the embodiment, the display system 100 includes a video source 110 and a display device 120 , wherein the video source 110 can be a video player or a computer. The display device 120 includes a timing controller 121, a picture buffer 123, a drive circuit 125, and a display panel 127.

The video source 110 provides a video control signal AVC and a video material signal AVD. The timing controller 121 is coupled to the video source 110 and the picture buffer 123 to receive the video control signal AVC and the video data signal AVD, and outputs a display data DD. The driving circuit 125 is coupled to the timing controller 121 and the display panel 127 to drive the display panel 127 according to the display data DD.

In this embodiment, when the picture provided by the video source 110 is a dynamic picture, that is, the pictures transmitted through the video data signal AVD are all different pictures, the video source 110 sets the video control signal AVC corresponding to the standard mode. At this time, the timing controller 121 controls the display device 120 to operate in the standard mode according to the video control signal AVC, and the timing controller 121 outputs the display material DD according to the picture transmitted by the video material signal AVD.

When the picture provided by the video source 110 is a static picture, that is, the pictures transmitted through the video data signal AVD are all the same picture, the video source 110 sets the video control signal AVC corresponding to the self-updating mode. At this time, the timing controller 121 controls the display device 120 to operate in the self-updating mode in accordance with the video and audio control signal AVC. Further, the timing controller 121 stores the first one of the plurality of still pictures (corresponding to the first picture) in the picture buffer 123, and simultaneously outputs the display material DD of the still picture corresponding to the first still picture.

Then, when the picture to be output by the video source 110 (corresponding to the second picture) is the same as the still picture stored in the picture buffer 123, the video control signal AVC will always correspond to the self-updating mode, so that the timing controller 121 continues to read. The still picture stored in the picture buffer 123 is output to display the material DD. Among them, audio and video sources The screen corresponding to the still picture in the picture buffer 123 can be stored for comparison, and the video source 110 does not set the video material signal AVD according to the picture to be output, that is, the video material signal AVD assumes an idle state.

On the other hand, when the picture (the corresponding second picture) to be output by the video source 110 is a still picture and is different from the still picture stored in the picture buffer 123, the video source 110 sets the video control signal AVC corresponding to the line data update mode and The video material information signal AVD is set according to at least one line of the display data to be output from the video source 110 to be different from the still picture stored in the picture buffer 123. At this time, the timing controller 121 is still controlled by the video control signal AVC to read the still picture stored in the picture buffer 123 to output the display material DD, and store the at least one line display material in the picture buffer 123. And the timing controller 121 determines the time point or the writing position of the at least one line display material writing to the picture buffer 123 according to the timing of the at least one line of display data and the timing of the display data DD. In other words, the timing controller 121 determines that the at least one line of display data is directly written to the picture buffer 123 or later to the picture buffer 123 according to the timing of the at least one line of display data and the timing of the display data DD; or, the timing controller 121, according to the timing of the at least one line display data and the timing of the display data DD, the at least one line display data is determined to be directly written into the previously corresponding write position in the picture buffer 123 or written to another write position in the picture buffer 123.

2A is a schematic diagram of a system of a display system in accordance with another embodiment of the present invention. Referring to FIG. 1 and FIG. 2A, in the present embodiment, the display device 120 is exemplified by the display device 200, wherein the same or similar elements are given the same or similar reference numerals. Timing The controller 210 includes a data multiplexer 211 and a picture controller 213. The data multiplexer 211 has a first input terminal E1, a second input terminal E2, and a first output terminal O1. The first input terminal E1 is coupled to the video source 110 to receive the video data signal AVD, and the second input terminal E2 is coupled to the screen. The controller 213 outputs a display data DD to the first output terminal O1. The data multiplexer 211 couples the first output terminal O1 to the first input terminal E1 or the second input terminal E2 according to the video control signal AVC.

The picture controller 213 is coupled to the video source 110, the picture buffer 123, and the second input E2 of the data multiplexer 211 for transmitting the video material signal AVD to the picture buffer 123 and storing the picture buffer 123. (corresponding to the first picture) is transmitted to the second input terminal E2 of the data multiplexer 211. The screen controller 213 determines the timing of the line display data transmitted by the video material data signal AVD and the timing of the screen stored in the transmission screen buffer 123 (corresponding to the timing of the display data DD) to the line display data transmitted by the video material data signal AVD. Whether the screen buffer 123 reads the corresponding line display material when receiving, wherein the corresponding line display material and the line display data transmitted by the video material data signal AVD are line display materials displayed at the same horizontal position in the display panel 127.

When the line buffer 123 reads the corresponding line display material when the line display data transmitted by the video material data signal AVD is received, the picture controller 213 displays the video picture after the end of the picture period corresponding to the line display data transmitted by the video material data signal AVD. The line display material transmitted by the data signal AVD is written in the picture buffer 123. When the line buffer 123 is not read by the line buffer 123 when the line display data transmitted by the video material signal AVD is received, the picture controller 213 directly directly inputs the video data signal AVD. The transmitted display material is written to the picture buffer 123.

In the present embodiment, the picture controller 213 includes a demultiplexer 221, a multiplexer 223, a line buffer 225, and a collision judging unit 227. The multiplexer 221 has a third input terminal E3, a second output terminal O2, and a third output terminal O3. The third input terminal E3 is coupled to the video source 110 to receive the video data signal AVD, and the third output terminal O3 is coupled to the line buffer. 225. The multiplexer 223 has a fourth input terminal E4, a fifth input terminal E5, and a fourth output terminal O4. The fourth input terminal E4 is coupled to the second output terminal O2 of the multiplexer 221, and the fourth output terminal of the O4 is coupled to the screen. Buffer 123.

The conflict determination unit 227 is coupled to the video source 110, the picture buffer 123, the demultiplexer 221, and the multiplexer 223 to determine the video data signal according to the timing of the line display data transmitted by the audio data signal AVD and the timing of the display data DD. Whether the screen buffer 123 reads the corresponding line display material when the line display data transmitted by the AVD is received. When the line buffer 123 reads the corresponding line display data when the line display data transmitted by the video material signal AVD is received, the conflict determination unit 227 controls the demultiplexer 221 to couple the third input terminal E3 to the third output terminal O3. The line display data transmitted by the video material data signal AVD is stored in the line buffer 225, and the conflict determination unit 227 controls the multiplexer 223 to input the fifth input after the end of the picture period corresponding to the line display material transmitted by the video material data signal AVD. The terminal E5 is coupled to the fourth output terminal O4 to write the line display data stored in the line buffer 225 to the picture buffer 123. When the line buffer 123 does not read the corresponding line display material when the line display data transmitted by the video material signal AVD is received, the conflict determination unit 227 controls the demultiplexer 221 to couple the third input terminal E3 to the second output end. O2, and control multiplexer 223 will be fourth The input terminal E4 is coupled to the fourth output terminal O4 to directly write the line display data transmitted by the video material data signal AVD into the picture buffer 123. The third input end E3 of the multiplexer 221 is pre-coupled to the second output end O2, and the fourth output end O4 of the multiplexer 223 is pre-coupled to the fourth input end E4.

2B is a timing diagram showing the transfer of data by a display system in accordance with an embodiment of the present invention. Referring to FIG. 1 , FIG. 2A and FIG. 2B , when the display device 200 is in the standard mode, the data multiplexer 211 is controlled by the AV control signal AVC to couple the first output end O1 to the first input end E1, that is, the output. The video data signal AVD is used as the display data DD, so that the pictures FD21 and FD22 formed by the display data DD are similar in timing to the pictures FD11 and FD12 formed by the audio data signal AVD transmission data.

When the display device 200 is in the self-updating mode, the data multiplexer 211 is controlled by the video control signal AVC to couple the first output terminal O1 to the second input terminal E2, and the picture controller 213 is stored in the picture buffer 123. The screen is transmitted to the second input terminal E2 of the data multiplexer 211, so that the screens FD23 to FD26 formed by the transfer of the material DD are displayed. Further, the display device 200 lowers the screen update rate of the display panel 127 on the premise of reducing power consumption, so that the transfer speed of the display material DD becomes slow, that is, the single screen period becomes longer. When the picture to be output by the video source 110 (corresponding to the second picture) is a static picture and is different from the still picture stored in the picture buffer 123, the video source 110 sets the video control signal AVC corresponding to the line data update mode, and transmits the audio and video data through the video data. The signal AVD transmission line displays the data LD11 and LD12, wherein the line display materials LD11 and LD12 are corresponding screens. FD13, and the line display materials LD11 and LD12 correspond to the line display materials LD21 and LD22 of the screen FD25, respectively.

According to the transmission timing of the line display materials LD11 and LD12, when the picture controller 213 of the timing controller 210 receives the line display material LD11, the picture controller 213 reads the corresponding line display material LD21 from the picture buffer 123, and thus conflicts. The judging unit 227 controls the demultiplexer 221 to store the line display material LD11 in the line buffer 225; when the picture controller 213 of the timing controller 210 receives the line display material LD12, the picture controller 213 has not yet received the picture buffer 123. Since the corresponding line display material LD22 is read, the conflict determination unit 227 controls the demultiplexer 221 and the multiplexer 223 to directly transfer the line display material LD1 to the screen buffer 123. After the end of the screen FD13 (i.e., after the time point TE1), the conflict determination unit 227 controls the multiplexer 223 to transfer the line display material LD11 stored in the line buffer 225 to the screen buffer 123.

3A is a schematic diagram of a system of a display system in accordance with another embodiment of the present invention. Referring to FIG. 1 , FIG. 2A and FIG. 3A , in the embodiment, the display device 120 is exemplified by the display device 300 , and the picture buffer 123 is exemplified by the picture buffer 320 , wherein the same or similar components are used the same or Similar to the label. The picture controller 311 is coupled to the video source 110, the picture buffer 320, and the second input E2 of the data multiplexer 211 for transmitting the video material signal AVD to the picture buffer 320 and storing the picture buffer 320. Transfer to the second input E2 of the data multiplexer 211.

The picture controller 311 displays according to the line transmitted by the video material signal AVD The timing of the data and the timing of the display data DD determine whether the end time of the screen period (corresponding to the first screen period) corresponding to the line display data transmitted by the AV material data signal AVD is later than the corresponding screen period of the display material DD (corresponding to the second The end time point of the screen period). The screen period corresponding to the line display data transmitted by the video material data signal AVD corresponds to the same screen count value of the screen period corresponding to the display material DD, and the screen count value is incremented by 1 at the starting point of each time the display data DD is transmitted. This will be explained later.

When the end time point of the screen period corresponding to the line display material transmitted by the video material data signal AVD is later than the end time point of the corresponding picture period of the display material DD, the line display data transmitted by the video material data signal AVD is displayed in the picture buffer 320. The write position is the same as the storage location of the corresponding display material in the previously stored screen of the picture buffer 320. When the end time point of the screen period corresponding to the line display material transmitted by the video material data signal AVD is earlier than or equal to the end time point of the corresponding picture period of the display material DD, the line display data transmitted by the video material data signal AVD is displayed in the picture buffer. The write position of the device 320 is different from the storage position of the corresponding display material in the picture previously stored by the picture buffer 320.

In the present embodiment, the picture buffer 320 has a first memory area R0 and a second memory area R1. When the end time of the screen period corresponding to the line display material transmitted by the video material data signal AVD is later than the end time point of the corresponding picture period of the display material DD and the line display data transmitted by the video material data signal AVD is in the picture buffer When the storage location of the corresponding display material in the previously stored screen is in the first memory area R0, the line display data transmitted by the video material signal AVD is The write position of the picture buffer 320 is located in the first memory area R0. When the end time point of the screen period corresponding to the line display material transmitted by the video material data signal AVD is earlier than or coincides with the end time point of the corresponding picture period of the display material DD, and the line display data transmitted by the video material data signal AVD is present When the storage location of the corresponding display material in the previously stored screen of the screen buffer 320 is in the first memory area R0, the line display data transmitted by the video material data signal AVD is located in the second memory area R1 at the writing position of the picture buffer 320. .

The picture controller 311 has a switching flag SW, a write lookup table LUTW, and a read lookup table LUTR. The picture controller 311 determines the write position of the line display material transmitted from the video material signal AVD in the picture buffer 320 in accordance with the write lookup table LUTW, and determines the read position of the picture buffer 320 in accordance with the read lookup table LUTR. The switching flag SW is used to mark whether the end time point of the picture period corresponding to the line display material transmitted by the video material data signal AVD is later than the end time point of the corresponding picture period of the display material DD, and the picture controller 311 according to the switching flag The SW decides whether to change the line display data transmitted to the video material signal AVD to a corresponding plurality of position flags in the write lookup table LUTW. Wherein, when the picture controller 311 receives the line display material transmitted by the video material data signal AVD, the write lookup table LUTW is modified to be the same as the read lookup table LUTR, and when the display data DD starts to be transmitted, the read lookup table LUTR is read. Modified to be the same as the write lookup table LUTW.

FIG. 3B is a timing diagram of data transmission by a display system according to an embodiment of the invention. Referring to FIG. 1 , FIG. 2A , FIG. 3A and FIG. 3B , in the embodiment, it is assumed that the display device 300 is in the self-updating mode, and the write lookup table LUTW has four The location flag Line_Addr_W[0]~Line_Addr_W[3], and the read lookup table LUTR have four position flags Line_Addr_R[0]~Line_Addr_R[3]. The switching flag SW is preset to the level “0”, and the position flag Line_Addr_W[0]~Line_Addr_W[3] is preset to the level “0” (ie corresponding to the first field area R0), and the position flag. The line Line_Addr_R[0]~Line_Addr_R[3] are preset to the level "0" (ie corresponding to the first field area R0).

At the time point TS1, the display data DD starts to be transmitted, and the picture count value is counted to M, that is, the picture FD41 is the corresponding picture count value M, and the position flag Line_Addr_R[0]~Line_Addr_R[3] is modified to be the same as Location flag Line_Addr_W[0]~Line_Addr_W[3]. At the time point TA1, the picture controller 311 receives the line display material LD31 corresponding to the picture FD31. At this time, the picture count value is M, that is, the picture controller 311 determines that the picture count value of the picture FD31 is M. Next, since both the screen FD41 and the screen FD31 are the corresponding screen count value M, the screen controller 311 determines whether or not the end time point TEA1 of the screen FD31 is later than the end time point TEA2 of the screen FD41.

In this embodiment, the end time point TEA1 is earlier than the end time point TEA2, so the picture controller 311 sets the switching flag SW to the level "1" to indicate the line display data LD31 transmitted by the video material data signal AVD. The memory area of the LD 32 in the picture buffer 320 cannot be the same as the picture FD41. According to the above, the picture controller 311 will change the Line_Addr_W[1] corresponding to the line display material LD31 from the level "0" to "1" (ie, corresponding to the second field area R1), and the picture controller 311 will line. The line_Addr_W[3] corresponding to the display data LD32 is Bit "0" is modified to "1" (ie corresponding to the second field area R1). Therefore, the picture controller 311 writes the line display materials LD31 and LD32 to the second field area R1 of the picture buffer 320.

At the time point TS2, the display data DD starts transmitting again, and the picture count value is counted to M+1, that is, the picture FD42 is the corresponding picture count value M+1, and the position flag Line_Addr_R[0]~Line_Addr_R[3] It will be modified to be the same as the position flag Line_Addr_W[0]~Line_Addr_W[3], so that the line display materials LD41 and LD42 of the screen FD42 will be identical to the line display data LD31 and LD32 of the screen FD31. At the time point TA2, the picture controller 311 receives the line display material LD33 corresponding to the picture FD32. At this time, the picture count value is M+1, that is, the picture controller 311 determines that the picture count value of the picture FD32 is M+1. Next, since both of the screen FD42 and the screen FD32 are the corresponding screen count value M+1, the screen controller 311 determines whether or not the end time point TEA3 of the screen FD32 is later than the end time point TEA4 of the screen FD42.

In this embodiment, the end time point TEA3 is later than the end time point TEA4, so the picture controller 311 sets the switching flag SW to the level "0" to indicate the line display data LD33 transmitted by the video material data signal AVD. The memory area of the LD 33 in the picture buffer 320 can be the same as the picture FD41. According to the above, the picture controller 311 does not modify the level "0" of the Line_Addr_W[0] corresponding to the line display material LD33 (ie, corresponds to the second field area R0), and the picture controller 311 does not modify the line display data LD34. The corresponding line_Addr_W[3] has a level "1" (ie, corresponds to the second field area R1). Therefore, the picture controller 311 will display the line The data LD 33 is written in the first domain area R0 of the picture buffer 320, and the line display material LD34 is written in the second field area R1 of the picture buffer 320.

At the time point Ts3, the display data DD starts transmitting again, and the picture count value is counted to M+2, that is, the picture FD43 is the corresponding picture count value M+2, and the position flag Line_Addr_R[0]~Line_Addr_R[3] It will be modified to be the same as the position flag Line_Addr_W[0]~Line_Addr_W[3], so that the line display data LD43 and LD45 of the picture FD43 will be the same as the line display data LD33 and LD34 of the picture FD32, and the line display data LD44 of the picture FD43. The material LD31 is displayed in the same line as the screen FD31.

4 is a flow chart of a method of transferring data of a display system in accordance with an embodiment of the present invention. Referring to FIG. 4, in the embodiment, it is determined whether the first picture stored in the picture buffer is the same as the second picture to be output by the video source (step S410). When the first picture stored in the picture buffer is the same as the second picture to be output by the video source, that is, the determination result of step S410 is “Yes”, the video source corresponds to the self-updating mode, and the video control signal is set, and the timing of the display device is displayed. The controller controls the video control signal to read the first picture stored in the picture buffer to output the display material (step S420). On the other hand, when the first picture stored in the picture buffer is different from the second picture to be output by the video source, that is, the determination result of step S410 is “No”, the video source corresponding line data update mode sets the video and audio control signal, and The at least one line of the second screen is different from the first screen, and the timing controller controls the video control signal to read the first screen stored in the picture buffer to output the display data and store the line display data. In the picture buffer, timing controller The timing at which the line display material is written to the screen buffer or the write position is determined based on the timing of the line display data and the timing of the display data (step S430).

FIG. 5 is a flow chart of a method for transferring data of a display system according to another embodiment of the present invention. Please refer to FIG. 4 and FIG. 5, which differ in steps S510, S520, S530, and S540. In step S510, the video source corresponding line data update mode sets the video and audio control signal, and according to the at least one line of the second picture in the second picture, the video data signal is set, and the timing controller is controlled to read and store the video control signal. The first screen of the picture buffer outputs the display data and stores the line display data in the picture buffer.

In step S520, the timing controller determines whether the screen buffer reads the corresponding line display data when the line display data is received, according to the timing of the display data and the timing of the display data. When the line buffer reads the corresponding line display material when the line display material is received, that is, the determination result of step S520 is YES, the timing controller displays the line after the screen period corresponding to the line display material ends. The data is written into the picture buffer (step S530); when the line display data is received, when the picture buffer does not read the corresponding line display material, that is, the determination result of step S520 is "NO", the timing controller directly directly The line display material is written to the picture buffer (step S540).

6 is a flow chart of a method of transferring data of a display system in accordance with still another embodiment of the present invention. Please refer to FIG. 4 and FIG. 6, which differ in steps S610, S620, S630, and S640. In step S610, the video source corresponding line data update mode sets the video and audio control signal, and according to at least one line different from the first picture in the second picture. The display data sets the video data signal, and the timing controller controls the video control signal to read the first picture stored in the picture buffer to output the display data and store the line display data in the picture buffer.

In step S620, the timing controller determines whether the end time point of the first picture period corresponding to the line display material is later than the end time point of the second picture period of the display material according to the timing of the line display material and the timing of the display data. When the end time point of the first picture period corresponding to the line display material is later than the end time point of the second picture period of the display material, that is, the determination result of step S620 is YES, the line display data is in the picture buffer. The writing position is the same as the storage position of the corresponding display material in the first screen (step S630); the end time point of the first screen period corresponding to the line display material is earlier than the end time of the second screen period of the displayed material At the time of the point, that is, the determination result of the step S620 is "NO", the writing position of the line display material in the picture buffer is different from the storage position of the corresponding display material in the first screen (step S640).

The details of the steps in the foregoing FIG. 4 to FIG. 6 can be referred to the embodiment shown in FIG. 1 , FIG. 2A , FIG. 2B , FIG. 3A and FIG. 3B , and details are not described herein again.

In summary, in the method for transmitting data of the display system according to the embodiment of the present invention, when the video source source corresponding to the line data update mode sets the video control signal and provides line display data, the timing controller displays the timing and display of the data according to the at least one line. The timing of the data determines the time point or write position at which the at least one line of the display data is written to the picture buffer. Thereby, it is possible to prevent the display device from displaying an erroneous image.

Although the present invention has been disclosed above by way of example, it is not intended to limit the present invention. The scope of the present invention is defined by the scope of the appended claims, which are defined by the scope of the appended claims, without departing from the spirit and scope of the invention. quasi.

100‧‧‧Display system

110‧‧‧Video source

120‧‧‧ display device

121‧‧‧Timing controller

123‧‧‧ Picture buffer

125‧‧‧Drive circuit

127‧‧‧ display panel

AVC‧‧‧Video Control Signal

AVD‧‧‧ audio and video data signal

DD‧‧‧Display information

Claims (17)

A display system comprising: a video source, providing a video control signal and a video data signal; a display device comprising: a picture buffer; a timing controller coupled to the video source and the picture buffer for receiving The video control signal and the audio and video data signal, and output a display data; a display panel; and a driving circuit coupled to the timing controller and the display panel to drive the display panel according to the display data; wherein, when When the first picture of the picture buffer is the same as the second picture to be output by the video source, the video source corresponds to a self-updating mode to set the video control signal, and the timing controller is controlled by the video control signal. Reading the first picture stored in the picture buffer to output the display data. When the first picture stored in the picture buffer is different from the second picture to be output by the video source, the video source corresponds to a line. The data update mode sets the video control signal and displays according to at least one line different from the first picture in the second picture. Setting the video data signal, the timing controller controls the video control signal to read the first picture stored in the picture buffer to output the display data, and store the at least one line display data in the picture buffer. The timing controller determines a time point or a writing position at which the at least one line of display data is written into the picture buffer according to the timing of the at least one line of display data and the timing of the display data. The display system of claim 1, wherein the timing controller comprises: a data multiplexer having a first input end, a second input end and a first output end, the first input end Coupling the video source to receive the video data signal, the first output terminal outputs the display data, wherein the data multiplexer couples the first output end to the first input end or the second according to the video audio control signal And a picture controller coupled to the video source, the picture buffer, and the second input end of the data multiplexer for transmitting the video data signal to the picture buffer, and the picture is The first picture stored in the buffer is transmitted to the second input end of the data multiplexer, and the picture controller determines, according to the timing of the at least one line display data and the timing of the display data, that the at least one line display material is received. Whether the picture buffer reads the corresponding line display data, and when the picture buffer reads the corresponding line display material when the at least one line display material is received, the picture controller is at least Writing at least one line of display data to the picture buffer after the end of one picture period corresponding to the one line display data, and when the picture buffer is not reading the corresponding line display material when the at least one line display material is received, the picture controller The at least one line of display data is directly written into the picture buffer. The display system of claim 2, wherein the picture controller comprises: a demultiplexer having a third input end, a second output end, and a third output end, the third input end Coupling the video source to receive the video data signal; a multiplexer having a fourth input terminal, a fifth input terminal, and a fourth output The fourth input end is coupled to the second output end, the fourth output end is coupled to the picture buffer; a line buffer is coupled between the third output end and the fifth input end; and a The conflict determining unit is coupled to the video source, the picture buffer, the demultiplexer, and the multiplexer, to determine, according to the timing of the at least one line of display data and the timing of the displayed data, that the at least one line of display data is received Whether the picture buffer reads the corresponding line display material, and when the picture buffer reads the corresponding line display material when the at least one line display material is received, the conflict determination unit controls the demultiplexer to the at least one line The display data is stored in the line buffer, and the conflict determination unit controls the multiplexer to write the at least one line of display data stored in the line buffer to the picture buffer after the end of the picture period corresponding to the at least one line of display data. When the at least one line of display data is received, the screen buffer does not read the corresponding line display material, the conflict determination unit controls the demultiplexer and the multiplexer The least direct line display data written to the frame buffer. The display system of claim 1, wherein the timing controller comprises: a data multiplexer having a first input end, a second input end and a first output end, the first input end Coupling the video source to receive the video data signal, the first output terminal outputs the display data, wherein the data multiplexer couples the first output end to the first input end or the second according to the video audio control signal An input terminal; and a picture controller coupled to the video source, the picture buffer, and the data The second input end of the device is configured to transmit the video data signal to the picture buffer, and transmit the first picture stored in the picture buffer to the second input end of the data multiplexer, where The screen controller determines, according to the timing of the at least one line of display data and the timing of the display data, whether an end time point of a first picture period corresponding to the at least one line display data is later than an end time point of a second picture period of the display material And when the end time point of the first picture period is later than the end time point of the second picture period, the at least one line display data is written in the picture buffer to be the same as the corresponding display material in the first picture. a storage location, when the end time point of the first picture period is earlier than or equal to the end time point of the second picture period, the writing position of the at least one line display material in the picture buffer is different from the corresponding position in the first picture The location where the display data is stored. The display system of claim 4, wherein the first picture period and the second picture period correspond to the same picture count value, and the picture count value is incremented by 1 at a starting point of the display data for transmission. The display system of claim 4, wherein the picture buffer has a first memory area and a second memory area, when an end time point of the first picture period is later than an end time of the second picture period And the at least one line display data is located in the first memory area when the storage location of the corresponding display material in the first screen is located in the first memory area, and the write position of the at least one line display data in the picture buffer is located in the first memory area. When the end time point of the first picture period is earlier than or equal to the end time point of the second picture period and the storage location of the corresponding display material in the first picture is located in the first memory area, the at least one line displays the data. Picture buffer The write position of the device is located in the second memory area. The display system of claim 6, wherein the picture controller has a write lookup table and a read lookup table, and the picture controller determines the at least one line of display data in the picture buffer according to the write lookup table. The write position of the device, and the read position of the picture buffer is determined according to the read lookup table. The display system of claim 7, wherein the picture controller further has a switching flag to mark whether an end time point during the first picture is later than an end time point of the second picture period, The picture controller determines, according to the switching flag, whether to change the at least one line of display data to the corresponding plurality of location flags in the write lookup table. The display system of claim 7, wherein when the picture controller receives the at least one line of display material, the write lookup table is modified to be the same as the read lookup table, when the display data begins to be transmitted. The read lookup table is modified to be the same as the write lookup table. A data transmission method for a display system, comprising: when a first picture stored in a picture buffer is the same as a second picture to be outputted by a video source, the video source is configured to correspond to a self-updating mode to set a video and audio control signal, a timing controller of a display device is controlled by the video control signal reading the first picture stored in the picture buffer to output a display data; and when the first picture stored in the picture buffer is different from the When the video source is to output the second picture, the video source corresponds to the first line data update mode, and the video control signal is set according to at least one line different from the first picture in the second picture. Setting the video data signal, the timing controller controls the video control signal to read the first picture stored in the picture buffer to output the display data, and store the at least one line display data in the picture buffer The timing controller determines a time point or a writing position at which the at least one line of display data is written into the picture buffer according to the timing of the at least one line of display data and the timing of the displayed data. The data transmission method of the display system of claim 10, wherein the timing controller determines the time at which the at least one line of display data is written into the picture buffer according to the timing of the at least one line of display data and the timing of the display data. The step of writing or writing the position includes: the timing controller determining, according to the timing of the at least one line of display data and the timing of the displayed data, whether the screen buffer reads the corresponding line display data when the at least one line of display data is received; When the at least one line of display data is received, the screen buffer reads the corresponding line display material, and the timing controller writes the at least one line of display data to the picture buffer after the end of a screen period corresponding to the at least one line of display data. And when the picture buffer does not read the corresponding line display data when the at least one line display material is received, the timing controller directly writes the at least one line display material into the picture buffer. The data transmission method of the display system of claim 10, wherein the timing controller determines the time at which the at least one line of display data is written into the picture buffer according to the timing of the at least one line of display data and the timing of the display data. The steps to point or write to the location include: The timing controller determines, according to the timing of the at least one line of display data and the timing of the display data, whether an end time point of a first picture period corresponding to the at least one line display data is later than an end time of a second picture period of the display material a point; when the end time of the first picture period is later than the end time point of the second picture period, the at least one line of display data is written in the picture buffer to be the same as the corresponding display material in the first picture. a storage location; when the end time point of the first picture period is earlier than or equal to the end time point of the second picture period, the writing position of the at least one line display material in the picture buffer is different from the first picture The storage location of the corresponding display data. The data transmission method of the display system according to claim 12, wherein the first picture period and the second picture period correspond to the same picture count value, and the picture count value is incremented by 1 to the display data for transmission. Starting point. The data transfer method of the display system of claim 12, wherein the picture buffer has a first memory area and a second memory area, and the data transfer method of the display system further comprises: during the first picture period When the end time point is later than the end time point of the second picture period and the storage location of the corresponding display data in the first picture is located in the first memory area, the at least one line of display data is displayed on the picture. a write position of the buffer is located in the first memory area; and an end time point of the first picture period is earlier than or equal to an end time point of the second picture period and a storage location of the corresponding display material in the first picture When located in the first memory area, the at least one line displays the write bit of the data in the picture buffer Placed in the second memory area. The data transfer method of the display system of claim 14, wherein the timing controller has a write lookup table and a read lookup table, and the timing controller determines the at least one line of display data according to the write lookup table. The write position of the picture buffer, and the read position of the picture buffer is determined according to the read lookup table. The data transfer method of the display system according to claim 15, wherein the timing controller further has a switching flag to mark whether an end time point of the first picture period is later than an end of the second picture period. At a time point, the timing controller determines whether to change the corresponding plurality of location flags in the write lookup table according to the switching flag. The data transfer method of the display system of claim 15, wherein when the timing controller receives the at least one line of display data, the write lookup table is modified to be the same as the read lookup table when the display When the data begins to be transferred, the read lookup table is modified to be the same as the write lookup table.