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TWI493537B - Display system and data transmission method thereof - Google Patents

Display system and data transmission method thereof Download PDF

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Publication number
TWI493537B
TWI493537B TW102119970A TW102119970A TWI493537B TW I493537 B TWI493537 B TW I493537B TW 102119970 A TW102119970 A TW 102119970A TW 102119970 A TW102119970 A TW 102119970A TW I493537 B TWI493537 B TW I493537B
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picture
display
period
data
screen
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TW102119970A
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TW201447865A (en
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Chi Cheng Chiang
Chih Hsuan Wang
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Himax Tech Ltd
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Description

顯示系統及其資料傳遞方法Display system and data transmission method thereof

本發明是有關於一種顯示系統及其資料傳遞方法,且特別是有關於一種具有畫面緩衝器的顯示系統及其資料傳遞方法。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.

顯示裝置一般會依照影音來源所提供的畫面來顯示對應的影像。但在顯示靜態影像的情況下,顯示裝置仍持續接收來自影音來源所傳送的畫面,並且顯示相同的影像。為了降低顯示裝置於顯示靜態影像時接收畫面的耗電量,顯示裝置中可配置儲存一整個畫面的畫面緩衝器。在顯示動態影像的情況下,顯示裝置可依照影音來源所提供的畫面來顯示對應的影像;在顯示靜態影像的情況下,顯示裝置可將靜態畫面儲存於畫面緩衝器中,而顯示裝置依據畫面緩衝器所儲存的靜態畫面來進行顯示。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.

然而,當影音來源提供新的靜態畫面時,顯示裝置的運作時序可能與影音來源提供畫面的運作時序不同步,因此顯示裝置將新的靜態畫面寫入畫面緩衝器的動作及顯示裝置將儲存於畫 面緩衝器的靜態畫面進行顯示的動作可能會無法順利銜接,進而造成顯示裝置顯示錯誤的影像。因此,如何使新的靜態畫面寫入畫面緩衝器與自畫面緩衝器讀取舊的靜態畫面能夠順利銜接則成為此類型顯示裝置的一個設計重點。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.

本發明提供一種顯示系統及其資料傳遞方法,其依據依據影音資料信號的時序及顯示資料的時序決定輸出儲存於畫面緩衝器的第一畫面或影音資料信號所傳送的第二畫面,以避免顯示裝置顯示錯誤的影像。The invention provides a display system and a data transmission method thereof, which are determined according to the timing of the video data signal and the timing of the display data, and output a second picture or a video file transmitted by the first picture or the video data signal stored in the picture buffer to avoid display. The device displays the wrong image.

本發明提出一種顯示系統,包括一影音來源及一顯示裝置。影音來源提供一影音控制信號及一影音資料信號。顯示裝置包括一畫面緩衝器、一時序控制器、一顯示面板及一驅動電路。時序控制器耦接影音來源及畫面緩衝器,以接收影音控制信號及影音資料信號,且輸出一顯示資料。驅動電路耦接時序控制器及顯示面板,以依據顯示資料驅動顯示面板。當儲存於畫面緩衝器的一第一畫面相同於影音來源欲輸出的一第二畫面時,影音來源對應一自我更新模式設定影音控制信號,而時序控制器受控於影音控制信號讀取儲存於畫面緩衝器的第一畫面以輸出顯示資料。當儲存於畫面緩衝器的第一畫面不同於影音來源欲輸出的第二畫面時,影音來源對應一資料更新模式設定影音控制信號且依據第二畫面設定影音資料信號,而時序控制器受控於影音控制信號將 第二畫面儲存於畫面緩衝器,並且依據影音資料信號的時序及顯示資料的時序決定輸出對應第一畫面或第二畫面的顯示資料。The invention provides a display system comprising a video source and a display device. The video source provides a video control signal and a video data signal. 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 a first picture stored in the picture buffer is the same as a second picture to be output by the video source, the video source corresponds to a self-updating mode setting video control signal, and the timing controller is controlled to read and store the video control signal. The first screen of the picture buffer outputs the 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 corresponds to a data update mode to set the video control signal and the video data signal is set according to the second picture, and the timing controller is controlled by Video control signal will The second picture is stored in the picture buffer, and the display data corresponding to the first picture or the second picture is output according to the timing of the video data signal and the timing of the display data.

在本發明之一實施例中,當對應第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應第一畫面的一畫面期間的一畫面顯示期間內時,時序控制器持續讀取儲存於畫面緩衝器的第一畫面以輸出顯示資料。In an embodiment of the present invention, when a start time of a picture display period corresponding to a picture period of the second picture is within a picture display period corresponding to a picture period of the first picture, the timing controller continues to read The first screen stored in the picture buffer is output to display the data.

在本發明之一實施例中,時序控制器將第二畫面儲存於畫面緩衝器的一起始位址更改為畫面緩衝器中未對應第一畫面的多個記憶體位址的其中之一。In an embodiment of the invention, the timing controller changes a start address stored in the picture buffer of the second picture to one of a plurality of memory addresses in the picture buffer that do not correspond to the first picture.

在本發明之一實施例中,時序控制器縮短對應第一畫面的畫面期間的畫面顯示期間。In an embodiment of the invention, the timing controller shortens the screen display period corresponding to the screen period of the first screen.

在本發明之一實施例中,時序控制器縮短對應第一畫面的畫面期間的多個水平空白期間。In an embodiment of the invention, the timing controller shortens a plurality of horizontal blank periods during a picture corresponding to the first picture.

在本發明之一實施例中,當對應第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應第一畫面的一畫面期間的一垂直空白期間內時,時序控制器輸出對應第二畫面的顯示資料。In an embodiment of the present invention, when a start time of a picture display period corresponding to a picture period of the second picture is located within a vertical blank period corresponding to a picture period of the first picture, the timing controller outputs a corresponding number Display data of the two screens.

在本發明之一實施例中,當對應第二畫面的畫面期間的畫面顯示期間的起始時間位於對應第一畫面的畫面期間的垂直空白期間的一第一期間內時,時序控制器將第二畫面儲存於畫面緩衝器,並且讀取儲存於畫面緩衝器的第二畫面以輸出顯示資料。In an embodiment of the present invention, when the start time of the picture display period corresponding to the picture period of the second picture is within a first period of the vertical blank period corresponding to the picture period of the first picture, the timing controller The two pictures are stored in the picture buffer, and the second picture stored in the picture buffer is read to output the display material.

在本發明之一實施例中,當畫面緩衝器的讀取存取速度 小於影音資料信號的位元率與顯示資料的位元率的總和時,時序控制器降低顯示資料的位元率,以使畫面緩衝器的存取速度大於等於影音資料信號的位元率與顯示資料的降低後的位元率的總和。In an embodiment of the invention, when the picture buffer is read and accessed When the bit rate of the video data signal is smaller than the bit rate of the display data, the timing controller reduces the bit rate of the display data so that the access speed of the picture buffer is greater than or equal to the bit rate and display of the video data signal. The sum of the bit rates after the reduction of the data.

在本發明之一實施例中,當對應第二畫面的畫面期間的畫面顯示期間的起始時間位於對應第一畫面的畫面期間的垂直空白期間的一第二期間內時,時序控制器將第二畫面儲存於畫面緩衝器且直接輸出對應第二畫面的顯示資料,其中第一期間與第二期間不重疊。In an embodiment of the present invention, when the start time of the picture display period corresponding to the picture period of the second picture is within a second period of the vertical blank period corresponding to the picture period of the first picture, the timing controller The two pictures are stored in the picture buffer and directly output the display data corresponding to the second picture, wherein the first period does not overlap with the second period.

在本發明之一實施例中,當影音來源對應自我更新模式設定影音控制信號時,影音來源則不設定影音資料信號。In an embodiment of the present invention, when the video source corresponds to the self-updating mode to set the video and audio control signal, the video source does not set the video data signal.

本發明亦提出一種顯示系統的資料傳遞方法,包括:當儲存於一畫面緩衝器的一第一畫面相同於一影音來源欲輸出的一第二畫面時,影音來源對應一自我更新模式設定一影音控制信號,一顯示裝置的一時序控制器受控於影音控制信號讀取儲存於畫面緩衝器的第一畫面以輸出一顯示資料;當儲存於畫面緩衝器的第一畫面不同於影音來源欲輸出的第二畫面時,影音來源對應一資料更新模式設定影音控制信號且依據第二畫面設定影音資料信號,而時序控制器受控於影音控制信號將第二畫面儲存於畫面緩衝器,並且依據影音資料信號的時序及顯示資料的時序決定輸出對應第一畫面或第二畫面的顯示資料。The present invention also provides a data transmission method for a display system, including: 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 an audio and video a control signal, a timing controller of a display device is controlled by the video control signal to read the first picture stored in the picture buffer to output a display data; when the first picture stored in the picture buffer is different from the video source, the output is to be output In the second picture, the video source corresponds to a data update mode to set the video control signal and the video data signal is set according to the second picture, and the timing controller controls the second picture to be stored in the picture buffer according to the video control signal, and according to the audio and video The timing of the data signal and the timing of the display data determine whether the output corresponding to the first screen or the second screen is output.

在本發明之一實施例中,依據影音資料信號的時序及顯 示資料的時序決定輸出對應第一畫面或第二畫面的顯示資料的步驟包括:當對應第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應第一畫面的一畫面期間的一畫面顯示期間內時,時序控制器持續讀取儲存於畫面緩衝器的第一畫面以輸出顯示資料。In an embodiment of the present invention, according to the timing and display of the audio and video data signals The step of displaying the data determines that the output of the display material corresponding to the first screen or the second screen includes: a start time of a screen display period during a screen corresponding to the second screen is located during a screen corresponding to the first screen During the screen display period, the timing controller continuously reads the first screen stored in the screen buffer to output the display material.

在本發明之一實施例中,顯示系統的資料傳遞方法更包括時序控制器將第二畫面儲存於畫面緩衝器的一起始位址更改為畫面緩衝器中未對應第一畫面的多個記憶體位址的其中之一。In an embodiment of the present invention, the data transfer method of the display system further includes: the timing controller changing a start address stored in the picture buffer of the second picture to a plurality of memory bits in the picture buffer not corresponding to the first picture. One of the addresses.

在本發明之一實施例中,顯示系統的資料傳遞方法更包括時序控制器縮短對應第一畫面的畫面期間的畫面顯示期間。In an embodiment of the present invention, the data transfer method of the display system further includes the timing controller shortening the screen display period during the screen corresponding to the first screen.

在本發明之一實施例中,時序控制器縮短對應第一畫面的畫面期間的畫面顯示期間的步驟包括:時序控制器縮短對應第一畫面的畫面期間的多個水平空白期間。In an embodiment of the present invention, the step of shortening the screen display period of the screen corresponding to the first screen by the timing controller includes: the timing controller shortening the plurality of horizontal blank periods corresponding to the screen period of the first screen.

在本發明之一實施例中,這些水平空白期間大於等於其最小時間限制。In one embodiment of the invention, these horizontal blank periods are greater than or equal to their minimum time limit.

在本發明之一實施例中,依據影音資料信號的時序及顯示資料的時序決定輸出對應第一畫面或第二畫面的顯示資料的步驟包括:當對應第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應第一畫面的一畫面期間的一垂直空白期間內時,時序控制器輸出對應第二畫面的顯示資料。In an embodiment of the present invention, the step of outputting the display material corresponding to the first picture or the second picture according to the timing of the video data signal and the timing of the display data includes: displaying a picture during a picture corresponding to the second picture When a start time of the period is within a vertical blank period corresponding to a picture period of the first picture, the timing controller outputs the display material corresponding to the second picture.

在本發明之一實施例中,時序控制器輸出對應第二畫面以輸出的顯示資料的步驟包括:當對應第二畫面的畫面期間的畫 面顯示期間的起始時間位於對應第一畫面的畫面期間的垂直空白期間的一第一期間內時,時序控制器將第二畫面儲存於畫面緩衝器,並且讀取儲存於畫面緩衝器的第二畫面以輸出顯示資料。In an embodiment of the present invention, the step of the timing controller outputting the display material corresponding to the second screen to output includes: painting corresponding to the screen corresponding to the second screen When the start time of the face display period is within a first period of the vertical blank period corresponding to the picture period of the first screen, the timing controller stores the second picture in the picture buffer and reads the first stored in the picture buffer The second screen displays the data as output.

在本發明之一實施例中,顯示系統的資料傳遞方法更包括:當畫面緩衝器的存取速度小於影音資料信號的位元率與顯示資料的位元率的總和時,時序控制器降低顯示資料的位元率,以使畫面緩衝器的存取速度大於等於影音資料信號的位元率與顯示資料的降低後的位元率的總和。In an embodiment of the present invention, the data transfer method of the display system further includes: when the access speed of the picture buffer is less than the sum of the bit rate of the video data signal and the bit rate of the displayed data, the timing controller reduces the display. The bit rate of the data is such that the access speed of the picture buffer is greater than or equal to the sum of the bit rate of the video material signal and the reduced bit rate of the displayed data.

在本發明之一實施例中,顯示資料的降低後的位元率小於影音資料信號的位元率。In an embodiment of the invention, the reduced bit rate of the displayed material is less than the bit rate of the audiovisual material signal.

在本發明之一實施例中,時序控制器輸出對應第二畫面的顯示資料的步驟包括:當對應第二畫面的畫面期間的畫面顯示期間的起始時間位於對應第一畫面的畫面期間的垂直空白期間的一第二期間內時,時序控制器將第二畫面儲存於畫面緩衝器且直接輸出對應第二畫面的顯示資料,其中第一期間與第二期間不重疊。In an embodiment of the present invention, the step of the timing controller outputting the display material corresponding to the second screen comprises: when the start time of the screen display period during the screen corresponding to the second screen is located in a vertical period corresponding to the screen of the first screen During a second period of the blank period, the timing controller stores the second picture in the picture buffer and directly outputs the display material corresponding to the second picture, wherein the first period does not overlap with the second period.

在本發明之一實施例中,第一期間位於第二期間之前,第一期間與第二期間的總和等於垂直空白期間,且第一期間的時間長度等於垂直空白期間的最小時間限制。In an embodiment of the invention, the first period is before the second period, the sum of the first period and the second period is equal to the vertical blank period, and the length of time of the first period is equal to the minimum time limit during the vertical blank period.

在本發明之一實施例中,顯示系統的資料傳遞方法更包括:當影音來源對應自我更新模式設定影音控制信號時,影音來源則不設定影音資料信號。In an embodiment of the present invention, the data transmission method of the display system further includes: when the video source corresponds to the self-updating mode setting the video and audio control signal, the video source does not set the video data signal.

基於上述,本發明實施例的顯示系統及其資料傳遞方法,在顯示裝置操作於資料更新模式時,時序控制器依據依據影音資料信號的時序及顯示資料的時序決定輸出儲存於畫面緩衝器的第一畫面或影音資料信號所傳送的第二畫面,以避免顯示裝置顯示錯誤的影像。Based on the above, the display system and the data transmission method thereof according to the embodiment of the present invention, when the display device operates in the data update mode, the timing controller determines the output to be stored in the screen buffer according to the timing of the video data signal and the timing of the display data. The second picture transmitted by a picture or video data signal to prevent the display device from displaying an erroneous image.

為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧顯示系統100‧‧‧Display system

110‧‧‧影音來源110‧‧‧Video source

120‧‧‧顯示裝置120‧‧‧ display device

121‧‧‧時序控制器121‧‧‧Timing controller

123‧‧‧畫面緩衝器123‧‧‧ Picture buffer

125‧‧‧驅動電路125‧‧‧Drive circuit

127‧‧‧顯示面板127‧‧‧ display panel

AVC‧‧‧影音控制信號AVC‧‧‧Video Control Signal

AVD‧‧‧影音資料信號AVD‧‧‧ audio and video data signal

DD‧‧‧顯示資料DD‧‧‧Display information

FD1、FD2‧‧‧畫面顯示期間FD1, FD2‧‧‧ screen display period

HB‧‧‧水平空白期間HB‧‧‧ horizontal blank period

HS‧‧‧水平掃描期間HS‧‧‧ horizontal scanning period

P1‧‧‧第一期間P1‧‧ first period

P2‧‧‧第二期間P2‧‧‧ second period

PF1、PF2、PF2a、PF2b‧‧‧畫面期間PF1, PF2, PF2a, PF2b‧‧‧ screen period

TS1‧‧‧起始時間TS1‧‧‧ starting time

VB1、VB2‧‧‧垂直空白期間VB1, VB2‧‧‧ vertical blank period

S710、S720、S730‧‧‧步驟S710, S720, S730‧‧ steps

圖1為依據本發明一實施例的顯示系統的系統示意圖。1 is a system diagram of a display system in accordance with an embodiment of the present invention.

圖2為依據本發明一實施例的顯示系統傳遞資料的時序示意圖。2 is a timing diagram showing the transfer of data by a display system in accordance with an embodiment of the present invention.

圖3依據本發明一實施例的單一畫面期間的時序示意圖。FIG. 3 is a timing diagram of a single picture period according to an embodiment of the invention.

圖4依據本發明一實施例的畫面緩衝器的記憶體空間的配置示意圖。FIG. 4 is a schematic diagram showing the configuration of a memory space of a picture buffer according to an embodiment of the invention.

圖5為依據本發明一實施例的顯示系統傳遞資料的時序示意圖。FIG. 5 is a timing diagram of transmitting data by a display system according to an embodiment of the invention.

圖6為依據本發明一實施例的顯示系統傳遞資料的時序示意圖。6 is a timing diagram showing the transfer of data by a display system in accordance with an embodiment of the present invention.

圖7為依據本發明一實施例的顯示系統的傳遞資料方法的流程圖。FIG. 7 is a flow chart of a method for transferring data of a display system according to an embodiment of the invention.

圖1為依據本發明一實施例的顯示系統的系統示意圖。請參照圖1,在本實施例中,顯示系統100包括影音來源110及顯示裝置120,其中影音來源110可以是影音播放器或電腦。顯示裝置120包括時序控制器121、畫面緩衝器123、驅動電路125及顯示面板127。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.

影音來源110提供一影音控制信號AVC及影音資料信號AVD。時序控制器121耦接影音來源110及畫面緩衝器123,以接收影音控制信號AVC及影音資料信號AVD,且輸出一顯示資料DD。驅動電路125耦接時序控制器121及顯示面板127,以依據顯示資料DD驅動顯示面板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.

在本實施例中,當影音來源110提供的畫面為動態畫面時,亦即透過影音資料信號AVD所傳送的每個畫面皆為不同的畫面,影音來源110會對應標準模式設定影音控制信號AVC。此時,時序控制器121會依據影音控制信號AVC控制顯示裝置120操作於標準模式,並且會依據影音資料信號AVD所傳送的畫面輸出顯示資料DD。In this embodiment, when the picture provided by the video source 110 is a dynamic picture, that is, each picture transmitted through the video material signal AVD is a different picture, 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 outputs the display material DD according to the picture transmitted by the video material signal AVD.

當影音來源110提供的畫面為靜態畫面時,亦即透過影音資料信號AVD所傳送的每個畫面皆為相同的畫面,影音來源110會對應自我更新模式設定影音控制信號AVC。此時,時序控制器121會依據影音控制信號AVC控制顯示裝置120操作於自我更新 模式。並且,時序控制器121會將多個靜態畫面中的第一張(對應第一畫面)儲存於畫面緩衝器123,同時輸出對應此第一張靜態畫面的靜態畫面的顯示資料DD。When the picture provided by the video source 110 is a static picture, that is, each picture transmitted through the video data signal AVD is 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 self-updating according to the AV control signal AVC. mode. 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.

接著,當影音來源110欲輸出的畫面(對應第二畫面)相同於儲存於畫面緩衝器123的靜態畫面時,則影音控制信號AVC會一直對應自我更新模式,以使時序控制器121持續讀取儲存於畫面緩衝器123的靜態畫面以輸出顯示資料DD。其中,影音來源110可儲存對應於畫面緩衝器123中的靜態畫面的畫面,以便於進行比對,並且影音來源110不會依據欲輸出的畫面設定影音資料信號AVD,亦即影音資料信號AVD呈現閒置狀態。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. The video source 110 can store a picture corresponding to the static picture in the picture buffer 123, so as to facilitate the comparison, and the video source 110 does not set the video data signal AVD according to the picture to be output, that is, the video data signal AVD is presented. Idle state.

另一方面,當影音來源110欲輸出的畫面(對應第二畫面)為靜態畫面且不同於儲存於畫面緩衝器123的靜態畫面時,影音來源110對應一資料更新模式設定影音控制信號AVC且依據欲輸出的畫面設定影音資料信號AVD。此時,時序控制器121會依據影音控制信號AVC控制顯示裝置120操作於資料更新模式。並且,由於顯示裝置120操作於自我更新模式時不會與影音來源110同步運作,因此影音資料信號AVD的時序可能會不同於時序控制器121輸出顯示資料DD的時序。On the other hand, when the picture (the corresponding second picture) to be output by the video source 110 is a static picture and is different from the static picture stored in the picture buffer 123, the video source 110 sets a video control signal AVC corresponding to a data update mode and is based on The picture to be output is set to the AV data signal AVD. At this time, the timing controller 121 controls the display device 120 to operate in the material update mode according to the video control signal AVC. Moreover, since the display device 120 does not operate in synchronization with the video source 110 when operating in the self-updating mode, the timing of the video material signal AVD may be different from the timing at which the timing controller 121 outputs the display data DD.

在顯示裝置120操作於資料更新模式時,時序控制器121會依據影音資料信號AVD的時序及顯示資料DD的時序決定對應儲存於畫面緩衝器123的靜態畫面或影音資料信號AVD所傳送的畫面輸出顯示資料DD,以避免顯示面板127顯示錯誤的影像。並 且,在畫面緩衝器123的存取速度不足以同時進行寫入及讀取時,時序控制器121可調整畫面緩衝器123的資料寫入方式及/或畫面緩衝器123的資料讀取方式,以使影音資料信號AVD所傳送的畫面可順利寫入畫面緩衝器123,並且儲存於畫面緩衝器123的靜態畫面可順利讀取。When the display device 120 is operated in the data update mode, the timing controller 121 determines the screen output corresponding to the still picture or the video material signal AVD stored in the picture buffer 123 according to the timing of the video data signal AVD and the timing of the display data DD. The data DD is displayed to prevent the display panel 127 from displaying an erroneous image. and Further, when the access speed of the screen buffer 123 is insufficient to simultaneously perform writing and reading, the timing controller 121 can adjust the data writing mode of the screen buffer 123 and/or the data reading mode of the screen buffer 123. The picture transmitted by the video material signal AVD can be smoothly written into the picture buffer 123, and the still picture stored in the picture buffer 123 can be smoothly read.

圖2為依據本發明一實施例的顯示系統傳遞資料的時序示意圖。請參照圖1及圖2,在本實施例中,在顯示裝置120操作於自我更新模式時,時序控制器121持續讀取儲存於畫面緩衝器123的靜態畫面以輸出顯示資料DD,以致於顯示資料DD的時序會形成多個畫面期間(如PF1),亦即對應畫面緩衝器123的靜態畫面的畫面期間。並且,在此假設影音來源110欲輸出的靜態畫面且不同於儲存於畫面緩衝器123的靜態畫面,因此影音控制信號AVC會對應資料更新模式而設定,且影音資料信號AVD會對應影音來源110欲輸出的靜態畫面而設定,以致於影音資料信號AVD的時序會形成一個畫面期間(如PF2),亦即對應影音資料信號AVD所傳送的靜態畫面的畫面期間。2 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 and FIG. 2, in the embodiment, when the display device 120 operates in the self-updating mode, the timing controller 121 continuously reads the static picture stored in the picture buffer 123 to output the display data DD so as to be displayed. The timing of the data DD forms a plurality of picture periods (e.g., PF1), that is, a picture period corresponding to the still picture of the picture buffer 123. Moreover, it is assumed here that the still picture to be output by the video source 110 is different from the still picture stored in the picture buffer 123, so the video control signal AVC is set corresponding to the data update mode, and the video data signal AVD corresponds to the video source 110. The output static picture is set such that the timing of the video material signal AVD forms a picture period (such as PF2), that is, a picture period of the still picture corresponding to the video material signal AVD.

在本實施例中,每一畫面期間(如PF1或PF2)包括一垂直空白期間(如VB1或VB2)及一畫面顯示期間(如FD1或FD2),並且畫面期間PF2的畫面顯示期間FD2的起始時間TS1位於畫面期間PF1的畫面顯示期間FD1內。此時,對應於儲存於畫面緩衝器123的靜態畫面的顯示資料DD已開始傳送至驅動電路125,因此時序控制器121仍會持續讀取儲存於畫面緩衝器123 的靜態畫面,以維持顯示資料DD的完整性,藉此避免顯示面板127顯示錯誤的影像。並且,時序控制器121會將影音資料信號AVD所傳送的靜態畫面可儲存於畫面緩衝器123中被讀取過的記憶體空間或未使用者的記憶體空間。In this embodiment, each picture period (such as PF1 or PF2) includes a vertical blank period (such as VB1 or VB2) and a picture display period (such as FD1 or FD2), and the picture display period FD2 during the picture period PF2 starts. The start time TS1 is located in the screen display period FD1 of the screen period PF1. At this time, the display material DD corresponding to the still picture stored in the picture buffer 123 has started to be transmitted to the driving circuit 125, so the timing controller 121 continues to read and store in the picture buffer 123. The static picture is maintained to maintain the integrity of the displayed material DD, thereby preventing the display panel 127 from displaying an erroneous image. Further, the timing controller 121 can store the still picture transmitted by the video material information signal AVD in the memory space read by the picture buffer 123 or the memory space of the user.

換言之,當影音資料信號AV的畫面期間PF2的畫面顯示期間FD2的起始時間TS1位於顯示資料DD的畫面期間PF1的畫面顯示期間FD1內時,時序控制器121會將影音資料信號AVD所傳送的靜態畫面寫入畫面緩衝器123,並且會持續讀取先前儲存於畫面緩衝器123的靜態畫面以輸出顯示資料DD。In other words, when the start time TS1 of the screen display period FD2 of the picture period PF2 of the video material information signal AV is within the picture display period FD1 of the picture period PF1 of the display material DD, the timing controller 121 transmits the video material information signal AVD. The still picture is written to the picture buffer 123, and the still picture previously stored in the picture buffer 123 is continuously read to output the display material DD.

在畫面緩衝器123的存取速度大於等於影音資料信號AVD的位元率(bit rate)與顯示資料DD的位元率的總和時,畫面緩衝器123可以順利執行上述操作。但在,在畫面緩衝器123的存取速度小於影音資料信號AVD的位元率與顯示資料DD的位元率的總和時,畫面緩衝器123執行上述操作可能會產生無法預期的錯誤。此時,時序控制器121可降低顯示資料DD的位元率,以使畫面緩衝器123的存取速度大於等於影音資料信號AVD的位元率與顯示資料DD的降低後的位元率的總和,其中顯示資料DD的降低後的位元率小於影音資料信號AVD的位元率。When the access speed of the picture buffer 123 is equal to or greater than the sum of the bit rate of the video material signal AVD and the bit rate of the display material DD, the picture buffer 123 can smoothly perform the above operation. However, when the access speed of the picture buffer 123 is smaller than the sum of the bit rate of the video material signal AVD and the bit rate of the display material DD, the above operation of the picture buffer 123 may cause an unexpected error. At this time, the timing controller 121 can reduce the bit rate of the display material DD so that the access speed of the picture buffer 123 is greater than or equal to the sum of the bit rate of the video material signal AVD and the reduced bit rate of the display material DD. , wherein the reduced bit rate of the display data DD is smaller than the bit rate of the video data signal AVD.

舉例來說,假設畫面緩衝器123的操作頻率最高為200M Hz,單筆資料寬度為32 bits,亦即畫面緩衝器123讀寫能力(或資料頻寬)為6.4G bps;假設顯示裝置120的畫面更新率(Frame Rate)為60 Hz,畫面品質為Full HD(解析度為1920×1080),單 一畫素的顯示資料DD的資料大小為24 bits,則影音資料信號AVD及顯示資料DD的位元率分別為3.6G bps(對應至操作頻率為150M Hz)。依據上述,影音資料信號AVD及顯示資料DD的位元率的總和為7.2G bps,超出了畫面緩衝器123的讀寫能力。在將顯示資料DD的操作頻率由150M Hz降低至100M Hz後(即顯示資料DD的降低後的位元率為2.4 G bps),而影音資料信號AVD及顯示資料DD的位元率的總和為6G bps,因此畫面緩衝器123可順利執行畫面的讀寫。For example, it is assumed that the operating frequency of the picture buffer 123 is up to 200 M Hz, and the width of the single data is 32 bits, that is, the read/write capability (or data bandwidth) of the picture buffer 123 is 6.4 G bps; The frame update rate is 60 Hz, and the picture quality is Full HD (resolution is 1920×1080). The data size of the display data DD of one pixel is 24 bits, and the bit rate of the video data signal AVD and the display data DD are respectively 3.6G bps (corresponding to the operating frequency of 150M Hz). According to the above, the sum of the bit rates of the video material data AVD and the display material DD is 7.2 G bps, which exceeds the reading and writing ability of the picture buffer 123. After the operating frequency of the display data DD is reduced from 150 M Hz to 100 M Hz (ie, the bit rate after the reduction of the display data DD is 2.4 G bps), and the sum of the bit rates of the AV data signal and the display data DD is Since 6G bps, the picture buffer 123 can smoothly perform reading and writing of the picture.

圖3依據本發明一實施例的單一畫面期間的時序示意圖。請參照圖1至圖3,上述實施例透過顯示資料DD的降低後的位元率,使得畫面緩衝器123可順利執行畫面的讀寫,但畫面緩衝器123的寫入速度會高於其速度。在畫面期間PF2的畫面顯示期間FD2的起始時間TS1靠近畫面期間PF1的畫面顯示期間FD1的結束時間時,儲存於畫面緩衝器123的靜態畫面的讀取結束會先於將影音資料信號AVD所傳送的靜態畫面完整寫入畫面緩衝器123,因此顯示面板127可顯示完整的影像。FIG. 3 is a timing diagram of a single picture period according to an embodiment of the invention. Referring to FIG. 1 to FIG. 3, in the above embodiment, by displaying the reduced bit rate of the data DD, the picture buffer 123 can smoothly perform reading and writing of the picture, but the writing speed of the picture buffer 123 is higher than the speed. . When the start time TS1 of the screen display period FD2 of the screen period PF2 is close to the end time of the screen display period FD1 of the screen period PF1, the end of the reading of the still picture stored in the screen buffer 123 is earlier than the video data signal AVD. The transmitted still picture is completely written to the picture buffer 123, so the display panel 127 can display the complete picture.

然而,在畫面期間PF2的畫面顯示期間FD2的起始時間TS1靠近畫面期間PF1的畫面顯示期間FD1的起始時間時,畫面緩衝器123可能將影音資料信號AVD所傳送的靜態畫面覆蓋儲存於畫面緩衝器123的靜態畫面中於畫面顯示期間FD1中未被讀取的部分,因此會造成顯示面板127顯示錯誤的影像。However, when the start time TS1 of the screen display period FD2 of the screen period PF2 is close to the start time of the screen display period FD1 of the screen period PF1, the screen buffer 123 may store the still picture overlay transmitted by the video material data signal AVD on the screen. The portion of the still picture of the buffer 123 that is not read during the screen display period FD1 causes the display panel 127 to display an erroneous image.

在本實施例中,時序控制器121可透過縮短畫面期間PF1 的畫面顯示期間FD1來了解決上述問題。在縮短畫面顯示期間FD1後,時序控制器121輸出對應儲存於畫面緩衝器123的靜態畫面的顯示資料DD的所需時間也會同步減少,相對來說可加快儲存於畫面緩衝器123的靜態畫面的存取速度,以避免儲存於畫面緩衝器123的靜態畫面中於畫面顯示期間FD1中未被讀取的部分被影音資料信號AVD所傳送的靜態畫面所覆蓋。In this embodiment, the timing controller 121 can shorten the picture period by PF1. The screen shows that FD1 has come to solve the above problem. After the screen display period FD1 is shortened, the time required for the timing controller 121 to output the display material DD corresponding to the still picture stored in the picture buffer 123 is also reduced synchronously, and the static picture stored in the picture buffer 123 can be relatively accelerated. The access speed is such that the portion of the still picture stored in the picture buffer 123 that is not read during the picture display period FD1 is covered by the still picture transmitted by the video material signal AVD.

進一步來說,畫面顯示期間FD1會對應多個水平掃描期間HS及多個水平空白期間HB,其中時序控制器121於水平空白期間HB中並不會輸出顯示資料,亦即時序控制器121會暫停讀取畫面緩衝器123的動作。因此,可縮短這些水平空白期間HB縮短以縮短畫面顯示期間FD1而不會影響顯示資料DD的輸出,但這些水平空白期間HB仍大於等於其最小時間限制,以避免驅動電路125無法正確驅動顯示面板127。Further, the screen display period FD1 corresponds to a plurality of horizontal scanning periods HS and a plurality of horizontal blank periods HB, wherein the timing controller 121 does not output display data in the horizontal blank period HB, that is, the timing controller 121 is suspended. The operation of the screen buffer 123 is read. Therefore, the HB shortening during these horizontal blank periods can be shortened to shorten the screen display period FD1 without affecting the output of the display material DD, but the horizontal blank period HB is still greater than or equal to its minimum time limit, so as to prevent the driving circuit 125 from properly driving the display panel. 127.

圖4依據本發明一實施例的畫面緩衝器的記憶體空間的配置示意圖。請參照圖1、圖2及圖4,相同於上述圖3實施例所描敘之問題,本實施例提供另一種解決方式。在本實施例中,假設靜態畫面佔用的畫面緩衝器123的記憶體空間為位址0-511(亦即靜態畫面的起始位址為0),而畫面緩衝器123中位址512-767的記憶體空間為閒置的。由於畫面緩衝器123有閒置的記憶體空間(如位址512-767),因此可將影音資料信號AVD所傳送的靜態畫面先寫入上述閒置的記憶體空間,亦即將畫面緩衝器123中讀寫的起始位址更改為靜態畫面未佔用的畫面緩衝器123的記憶體 空間所對應的多個位址的其中之一,例如將畫面緩衝器123中讀寫的起始位址更改512。FIG. 4 is a schematic diagram showing the configuration of a memory space of a picture buffer according to an embodiment of the invention. Referring to FIG. 1 , FIG. 2 and FIG. 4 , the same as the problem described in the embodiment of FIG. 3 above, this embodiment provides another solution. In this embodiment, it is assumed that the memory space of the picture buffer 123 occupied by the static picture is the address 0-511 (that is, the start address of the static picture is 0), and the address in the picture buffer 123 is 512-767. The memory space is idle. Since the picture buffer 123 has an idle memory space (such as the address 512-767), the static picture transmitted by the video data signal AVD can be first written into the idle memory space, that is, the picture buffer 123 is read. The start address of the write is changed to the memory of the picture buffer 123 that is not occupied by the still picture. One of the plurality of addresses corresponding to the space, for example, the start address read and written in the picture buffer 123 is changed 512.

在本實施例中,畫面緩衝器123中閒置的記憶體空間越多,則儲存於畫面緩衝器123的靜態畫面於畫面顯示期間FD1中未被讀取的部分被覆蓋的機會減少。並且,當畫面緩衝器123中閒置的記憶體空間大於等於儲存一個畫面的記憶體空間且適當地設定讀寫的起始位址時,則儲存於畫面緩衝器123的靜態畫面於畫面顯示期間FD1中未被讀取的部分不會被覆蓋。In the present embodiment, the more memory space that is left unused in the picture buffer 123, the less chance that the still picture stored in the picture buffer 123 is overwritten in the portion of the picture display period FD1 that is not read. Moreover, when the memory space that is idle in the picture buffer 123 is greater than or equal to the memory space in which one picture is stored and the start address of the read/write is appropriately set, the still picture stored in the picture buffer 123 is displayed during the screen display period FD1. The unread portion is not overwritten.

綜合上述實施例,在畫面緩衝器123為有限容量的限制下,對於如何選擇一個滿足畫面緩衝器123的操作頻率的最低輸出頻率(即顯示資料DD的操作頻率),大約可由以下式子得出:bit _rate =h _totalv _totalbit _per _pixelframe _rate ………(1)In summary of the above embodiment, under the limitation of the limited capacity of the picture buffer 123, how to select a minimum output frequency (i.e., the operating frequency of the display material DD) that satisfies the operating frequency of the picture buffer 123 can be approximated by the following equation : bit _ rate = h _ total . v _ total . Bit _ per _ pixel . Frame _ rate .........(1)

frame _active _size =h _sizev _sizebit _per _pixel ………(2) Frame _ active _ size = h _ size . v _ size . Bit _ per _ pixel .........(2)

其中,bit_rate為位元率,h_total為一個畫面的水平寬度,v_total為一個畫面的垂直寬度,bit_per_pixel為一個像素對應的資料大小,frame_rate為畫面更新率,frame_active_size為畫面中主動區域(對應至畫面顯示期間)的大小,h_size為主動區域的水平寬度,v_size為主動區域的垂直寬度,h_blanking_i為影音資 料信號AVD的垂直空白期間大小,clk_i為影音資料信號AVD的操作頻率,h_blanking_o為顯示資料DD的垂直空白期間大小,clk_o為顯示資料DD的操作頻率,frame_buffer_size為畫面緩衝器123的容量大小,t為輸出主動區域所需的時間。經由以上式子可以推導出近似最小可容許的顯示資料DD的操作頻率,其中式子(3)的h_blanking_o可對應至圖3實施例中縮短後的水平空白期間HB。Where bit_rate is the bit rate, h_total is the horizontal width of a picture, v_total is the vertical width of a picture, bit_per_pixel is the data size corresponding to one pixel, frame_rate is the picture update rate, and frame_active_size is the active area in the picture (corresponding to the picture display) The size of the period, h_size is the horizontal width of the active area, v_size is the vertical width of the active area, and h_blanking_i is the audio and video The size of the vertical blank period of the material signal AVD, clk_i is the operating frequency of the video data signal AVD, h_blanking_o is the vertical blank period size of the display data DD, clk_o is the operating frequency of the display data DD, and frame_buffer_size is the capacity of the picture buffer 123, t The time required to output the active area. The operating frequency of the approximately minimum allowable display material DD can be derived via the above equation, wherein the h_blanking_o of the equation (3) can correspond to the shortened horizontal blank period HB in the embodiment of FIG.

圖5為依據本發明一實施例的顯示系統傳遞資料的時序示意圖。請參照圖1、圖2及圖5,其相同或相似部分使用相同或相似的標號。在本實施例中,將畫面期間PF1的垂直空白期間VB1分為第一期間P1及第二期間P2,其中第一期間P1位於第二期間P2之前,第一期間P1與第二期間P2的總和等於垂直空白期間VB1,且第一期間P1的時間長度等於垂直空白期間VB1的最小時間限制。FIG. 5 is a timing diagram of transmitting data by a display system according to an embodiment of the invention. 1 , 2 and 5, the same or similar parts are designated by the same or similar reference numerals. In the present embodiment, the vertical blank period VB1 of the picture period PF1 is divided into a first period P1 and a second period P2, wherein the first period P1 is before the second period P2, and the sum of the first period P1 and the second period P2 It is equal to the vertical blank period VB1, and the length of time of the first period P1 is equal to the minimum time limit of the vertical blank period VB1.

在本實施例中,畫面期間PF2a的畫面顯示期間FD2的起始時間TS1位於垂直空白期間VB1的第二期間P2。此時,表示驅動電路125已準備好接收顯示資料DD,亦即將對應影音資料信號AVD所傳送的靜態畫面的顯示資料DD直接傳送至驅動電路125,驅動電路125可依據所接收的顯示資料DD驅動顯示面板127。因此,時序控制器121可將對應影音資料信號AVD所傳送的靜態畫面的顯示資料DD直接傳送至驅動電路125,並且將影音資料信號AVD所傳送的靜態畫面儲存於畫面緩衝器123。In the present embodiment, the start time TS1 of the screen display period FD2 of the picture period PF2a is located in the second period P2 of the vertical blank period VB1. At this time, it indicates that the driving circuit 125 is ready to receive the display data DD, that is, the display data DD of the static picture transmitted by the corresponding audio and video data signal AVD is directly transmitted to the driving circuit 125, and the driving circuit 125 can be driven according to the received display data DD. The display panel 127. Therefore, the timing controller 121 can directly transmit the display material DD of the still picture transmitted corresponding to the video material data signal AVD to the drive circuit 125, and store the still picture transmitted by the video material data signal AVD in the picture buffer 123.

圖6為依據本發明一實施例的顯示系統傳遞資料的時序示意圖。請參照圖1、圖2、圖5及圖6,其相同或相似部分使用相同或相似的標號。在本實施例中,畫面期間PF2b的畫面顯示期間FD2的起始時間TS1位於垂直空白期間VB1的第一期間P1。此時,表示驅動電路125未準備好接收顯示資料DD,亦即將對應影音資料信號AVD所傳送的靜態畫面的顯示資料DD直接傳送至驅動電路125會造成驅動電路125無法正確驅動顯示面板127。因此,時序控制器121可先將影音資料信號AVD所傳送的靜態畫面儲存於畫面緩衝器123,再從畫面緩衝器123中讀取新的靜態畫面而輸出顯示資料DD。6 is a timing diagram showing the transfer of data by a display system in accordance with an embodiment of the present invention. Referring to Figures 1, 2, 5 and 6, the same or similar parts are designated by the same or similar reference numerals. In the present embodiment, the start time TS1 of the screen display period FD2 of the picture period PF2b is located in the first period P1 of the vertical blank period VB1. At this time, it is indicated that the driving circuit 125 is not ready to receive the display data DD, that is, the display data DD of the still picture transmitted by the corresponding video material signal AVD is directly transmitted to the driving circuit 125, so that the driving circuit 125 cannot properly drive the display panel 127. Therefore, the timing controller 121 can first store the still picture transmitted by the video material information signal AVD in the picture buffer 123, and then read the new still picture from the picture buffer 123 to output the display material DD.

此外,在畫面緩衝器123的存取速度小於影音資料信號AVD的位元率與顯示資料DD的位元率的總和時,可參照圖2實施例降低顯示資料DD的位元率,以使畫面緩衝器123的存取速度大於等於影音資料信號AVD的位元率與顯示資料DD的降低後的位元率的總和。由於時序控制器121從畫面緩衝器123中讀取新的靜態畫面,因此不會有未讀取的部分畫面被覆蓋的問題。In addition, when the access speed of the picture buffer 123 is smaller than the sum of the bit rate of the video material signal AVD and the bit rate of the display material DD, the bit rate of the display material DD can be reduced by referring to the embodiment of FIG. 2 to make the picture The access speed of the buffer 123 is greater than or equal to the sum of the bit rate of the video material signal AVD and the reduced bit rate of the display material DD. Since the timing controller 121 reads a new still picture from the picture buffer 123, there is no problem that some unread partial pictures are covered.

依據上述圖5及圖6實施例所述,當影音資料信號AVD的畫面期間(如PF2a、PF2b)的畫面顯示期間FD2的起始時間TS1位於垂直空白期間VB1中,時序控制器121會輸出對應影音資料信號AVD所傳送的靜態畫面的顯示資料DD。According to the embodiment of FIG. 5 and FIG. 6 described above, when the start time TS1 of the picture display period FD2 during the picture period (eg, PF2a, PF2b) of the video material data signal AVD is in the vertical blank period VB1, the timing controller 121 outputs the corresponding The display material DD of the still picture transmitted by the AV material signal AVD.

圖7為依據本發明一實施例的顯示系統的傳遞資料方法的流程圖。請參照圖7,在本實施例中,會判斷儲存於畫面緩衝器 的第一畫面是否相同於影音來源欲輸出的第二畫面(步驟S710)。當儲存於畫面緩衝器的第一畫面相同於影音來源欲輸出的第二畫面時,亦即步驟S710的判斷結果為“是”,步驟S720會被執行。在步驟S720中,影音來源對應自我更新模式設定影音控制信號,且顯示裝置的時序控制器受控於影音控制信號讀取儲存於畫面緩衝器的第一畫面以輸出顯示資料。反之,當儲存於畫面緩衝器的第一畫面不同於影音來源欲輸出的第二畫面時,亦即步驟S710的判斷結果為“否”,步驟S730會被執行。在步驟S730中,影音來源對應資料更新模式設定影音控制信號且依據第二畫面設定影音資料信號,而時序控制器受控於影音控制信號將第二畫面儲存於畫面緩衝器,並且依據影音資料信號的時序及顯示資料的時序決定輸出對應第一畫面或第二畫面的顯示資料。其中,上述步驟的細節可參照圖1至圖6實施例所示,在此則不再贅述。FIG. 7 is a flow chart of a method for transferring data of a display system according to an embodiment of the invention. Referring to FIG. 7, in this embodiment, it is determined to be stored in the picture buffer. Whether the first picture is the same as the second picture to be output by the video source (step S710). 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 S710 is "YES", step S720 is executed. In step S720, the video source determines the video control signal corresponding to the self-updating mode, and the timing controller of the display device controls the video control signal to read the first picture stored in the picture buffer to output the display data. 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 S710 is "NO", step S730 is executed. In step S730, the video source corresponding data update mode sets the video control signal and sets the video data signal according to the second picture, and the timing controller controls the second picture to be stored in the picture buffer according to the video control signal, and according to the video data signal. The timing and the timing of the displayed data determine whether the output corresponding to the first screen or the second screen is output. The details of the above steps may be referred to the embodiment of FIG. 1 to FIG. 6 , and details are not described herein again.

綜上所述,本發明實施例的顯示系統及其資料傳遞方法,在顯示裝置操作於資料更新模式時,時序控制器依據依據影音資料信號的時序及顯示資料的時序決定輸出儲存於畫面緩衝器的第一畫面或影音資料信號所傳送的第二畫面,以避免顯示裝置顯示錯誤的影像。並且,在畫面緩衝器不足以同時讀寫的情況下,時序控制器降低顯示資料的位元率,並且縮短畫面顯示期間或設定新的靜態畫面的起始位址對應至閒置的記憶體空間,以避免待讀取的部分畫面被覆蓋。In summary, in the display system and the data transmission method of the embodiment of the present invention, when the display device operates in the data update mode, the timing controller determines the output to be stored in the screen buffer according to the timing of the video data signal and the timing of the display data. The first picture or the second picture transmitted by the video material signal to prevent the display device from displaying an erroneous image. Moreover, in the case that the picture buffer is insufficient for simultaneous reading and writing, the timing controller reduces the bit rate of the displayed data, and shortens the picture display period or sets the start address of the new still picture to correspond to the idle memory space. To prevent part of the picture to be read from being overwritten.

雖然本發明已以實施例揭露如上,然其並非用以限定本 發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。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.

S710、S720、S730‧‧‧步驟S710, S720, S730‧‧ steps

Claims (30)

一種顯示系統,包括:一影音來源,提供一影音控制信號及一影音資料信號;一顯示裝置,包括;一畫面緩衝器;一時序控制器,耦接該影音來源及該畫面緩衝器,以接收該影音控制信號及該影音資料信號,且輸出一顯示資料;一顯示面板;以及一驅動電路,耦接該時序控制器及該顯示面板,以依據該顯示資料驅動該顯示面板;其中,當儲存於該畫面緩衝器的一第一畫面相同於該影音來源欲輸出的一第二畫面時,該影音來源對應一自我更新模式設定該影音控制信號,而該時序控制器受控於該影音控制信號讀取儲存於該畫面緩衝器的該第一畫面以輸出該顯示資料,當儲存於該畫面緩衝器的該第一畫面不同於該影音來源欲輸出的該第二畫面時,該影音來源對應一資料更新模式設定該影音控制信號且依據該第二畫面設定該影音資料信號,而該時序控制器受控於該影音控制信號將該第二畫面儲存於該畫面緩衝器,並且依據該影音資料信號的時序及該顯示資料的時序決定輸出對應該第一畫面或該第二畫面的該顯示資料。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 one The data update mode sets the video control signal and sets the video data signal according to the second picture, and the timing controller The video control signal to control the second picture stored in the picture buffer, and the timing of the video data and the display data signal corresponding to the first picture or the second picture display timing determined according to the data output. 如申請專利範圍第1項所述之顯示系統,其中當對應該第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應該 第一畫面的一畫面期間的一畫面顯示期間內時,該時序控制器持續讀取儲存於該畫面緩衝器的該第一畫面以輸出該顯示資料。The display system of claim 1, wherein a start time during a screen display period corresponding to a picture of the second picture is corresponding to The timing controller continuously reads the first screen stored in the screen buffer to output the display material during a screen display period of one screen period of the first screen. 如申請專利範圍第2項所述之顯示系統,其中當該畫面緩衝器的存取速度小於該影音資料信號的位元率與該顯示資料的位元率的總和時,該時序控制器降低該顯示資料的位元率,以使該畫面緩衝器的存取速度大於等於該影音資料信號的位元率與該顯示資料的降低後的位元率的總和。The display system of claim 2, wherein when the access speed of the picture buffer is less than a sum of a bit rate of the video data signal and a bit rate of the display data, the timing controller reduces the The bit rate of the data is displayed such that the access speed of the picture buffer is greater than or equal to the sum of the bit rate of the video material signal and the reduced bit rate of the display data. 如申請專利範圍第3項所述之顯示系統,其中該顯示資料的降低後的位元率小於該影音資料信號的位元率。The display system of claim 3, wherein the reduced bit rate of the display material is less than the bit rate of the video data signal. 如申請專利範圍第3項所述之顯示系統,其中該時序控制器將該第二畫面儲存於該畫面緩衝器的一起始位址更改為該畫面緩衝器中未對應該第一畫面的多個記憶體位址的其中之一。The display system of claim 3, wherein the timing controller changes a start address of the second picture stored in the picture buffer to a plurality of picture buffers that do not correspond to the first picture. One of the memory addresses. 如申請專利範圍第3項所述之顯示系統,其中該時序控制器縮短對應該第一畫面的該畫面期間的該畫面顯示期間。The display system of claim 3, wherein the timing controller shortens the screen display period during the screen corresponding to the first screen. 如申請專利範圍第6項所述之顯示系統,其中該時序控制器縮短對應該第一畫面的該畫面期間的多個水平空白期間。The display system of claim 6, wherein the timing controller shortens a plurality of horizontal blank periods during the picture corresponding to the first picture. 如申請專利範圍第7項所述之顯示系統,其中該些水平空白期間大於等於其最小時間限制。The display system of claim 7, wherein the horizontal blank periods are greater than or equal to a minimum time limit thereof. 如申請專利範圍第1項所述之顯示系統,其中當對應該第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應該第一畫面的一畫面期間的一垂直空白期間內時,該時序控制器輸出對應該第二畫面的該顯示資料。The display system of claim 1, wherein a start time of a picture display period during a picture corresponding to the second picture is located within a vertical blank period corresponding to a picture period of the first picture The timing controller outputs the display material corresponding to the second screen. 如申請專利範圍第9項所述之顯示系統,其中當對應該第二畫面的該畫面期間的該畫面顯示期間的該起始時間位於對應該第一畫面的該畫面期間的該垂直空白期間的一第一期間內時,該時序控制器將該第二畫面儲存於該畫面緩衝器,並且讀取儲存於該畫面緩衝器的該第二畫面以輸出該顯示資料。The display system of claim 9, wherein the start time of the screen display period during the screen corresponding to the second screen is located during the vertical blank period corresponding to the screen of the first screen During a first period, the timing controller stores the second picture in the picture buffer, and reads the second picture stored in the picture buffer to output the display data. 如申請專利範圍第10項所述之顯示系統,其中當該畫面緩衝器的存取速度小於該影音資料信號的位元率與該顯示資料的位元率的總和時,該時序控制器降低該顯示資料的位元率,以使該畫面緩衝器的存取速度大於等於該影音資料信號的位元率與該顯示資料的降低後的位元率的總和。The display system of claim 10, wherein when the access speed of the picture buffer is less than a sum of a bit rate of the video data signal and a bit rate of the display data, the timing controller reduces the The bit rate of the data is displayed such that the access speed of the picture buffer is greater than or equal to the sum of the bit rate of the video material signal and the reduced bit rate of the display data. 如申請專利範圍第11項所述之顯示系統,其中該顯示資料降低後的的位元率小於該影音資料信號的位元率。The display system of claim 11, wherein the reduced bit rate of the display data is less than the bit rate of the video data signal. 如申請專利範圍第10項所述之顯示系統,其中當對應該第二畫面的該畫面期間的該畫面顯示期間的該起始時間位於對應該第一畫面的該畫面期間的該垂直空白期間的一第二期間內時,該時序控制器將該第二畫面儲存於該畫面緩衝器且直接輸出對應該第二畫面的該顯示資料,其中該第一期間與該第二期間不重疊。The display system of claim 10, wherein the start time of the screen display period during the screen corresponding to the second screen is located during the vertical blank period corresponding to the screen of the first screen During a second period, the timing controller stores the second picture in the picture buffer and directly outputs the display material corresponding to the second picture, wherein the first period does not overlap with the second period. 如申請專利範圍第13項所述之顯示系統,其中該第一期間位於該第二期間之前,該第一期間與該第二期間的總和等於該垂直空白期間,且該第一期間的時間長度等於該垂直空白期間的最小時間限制。The display system of claim 13, wherein the first period is before the second period, the sum of the first period and the second period is equal to the vertical blank period, and the length of the first period Equal to the minimum time limit for this vertical blank period. 如申請專利範圍第1項所述之顯示系統,其中當該影音 來源對應該自我更新模式設定該影音控制信號時,該影音來源則不設定該影音資料信號。The display system of claim 1, wherein the video and audio When the source sets the video control signal corresponding to the self-updating mode, the video source does not set the video data signal. 一種顯示系統的資料傳遞方法,包括:當儲存於一畫面緩衝器的一第一畫面相同於一影音來源欲輸出的一第二畫面時,該影音來源對應一自我更新模式設定一影音控制信號,一顯示裝置的一時序控制器受控於該影音控制信號讀取儲存於該畫面緩衝器的該第一畫面以輸出一顯示資料;以及當儲存於該畫面緩衝器的該第一畫面不同於該影音來源欲輸出的該第二畫面時,該影音來源對應一資料更新模式設定該影音控制信號且依據該第二畫面設定該影音資料信號,而該時序控制器受控於該影音控制信號將該第二畫面儲存於該畫面緩衝器,並且依據該影音資料信號的時序及該顯示資料的時序決定輸出對應該第一畫面或該第二畫面的該顯示資料。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 corresponding to a data update mode sets the video control signal and sets the video data signal according to the second picture, and the timing controller is controlled by the video control signal to The second picture is stored in the picture buffer, and the output data corresponding to the first picture or the second picture is output according to the timing of the video data signal and the timing of the display data. 如申請專利範圍第16項所述之顯示系統的資料傳遞方法,其中依據該影音資料信號的時序及該顯示資料的時序決定輸出對應該第一畫面或該第二畫面的該顯示資料的步驟包括:當對應該第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應該第一畫面的一畫面期間的一畫面顯示期間內時,該時序控制器持續讀取儲存於該畫面緩衝器的該第一畫面以輸出該顯示資料。The data transmission method of the display system of claim 16, wherein the step of outputting the display material corresponding to the first picture or the second picture according to the timing of the video data signal and the timing of the display data comprises: : when a start time of a picture display period corresponding to a picture period of the second picture is within a picture display period corresponding to a picture period of the first picture, the timing controller continuously reads and stores the picture buffer The first picture of the device outputs the display material. 如申請專利範圍第17項所述之顯示系統的資料傳遞方法,更包括: 當該畫面緩衝器的存取速度小於該影音資料信號的位元率與該顯示資料的位元率的總和時,該時序控制器降低該顯示資料的位元率,以使該畫面緩衝器的存取速度大於等於該影音資料信號的位元率與該顯示資料的降低後的位元率的總和。For example, the data transmission method of the display system described in claim 17 of the patent application includes: When the access speed of the picture buffer is less than the sum of the bit rate of the video data signal and the bit rate of the display data, the timing controller reduces the bit rate of the display data to make the picture buffer The access speed is greater than or equal to the sum of the bit rate of the video material signal and the reduced bit rate of the displayed data. 如申請專利範圍第18項所述之顯示系統的資料傳遞方法,其中該顯示資料的降低後的位元率小於該影音資料信號的位元率。The data transmission method of the display system according to claim 18, wherein the reduced bit rate of the display data is smaller than the bit rate of the video data signal. 如申請專利範圍第18項所述之顯示系統的資料傳遞方法,更包括:該時序控制器將該第二畫面儲存於該畫面緩衝器的一起始位址更改為該畫面緩衝器中未對應該第一畫面的多個記憶體位址的其中之一。The method for transmitting data of the display system according to claim 18, further comprising: the timing controller changing a start address of the second picture stored in the picture buffer to an uncorresponding in the picture buffer One of a plurality of memory addresses of the first picture. 如申請專利範圍第18項所述之顯示系統的資料傳遞方法,更包括:該時序控制器縮短對應該第一畫面的該畫面期間的該畫面顯示期間。The data transfer method of the display system according to claim 18, further comprising: the timing controller shortening the screen display period during the screen corresponding to the first screen. 如申請專利範圍第21項所述之顯示系統的資料傳遞方法,其中該時序控制器縮短對應該第一畫面的該畫面期間的該畫面顯示期間的步驟包括:該時序控制器縮短對應該第一畫面的該畫面期間的多個水平空白期間。The data transfer method of the display system according to claim 21, wherein the step of shortening the screen display period during the screen corresponding to the first screen by the timing controller comprises: the timing controller shortening the corresponding first A plurality of horizontal blank periods during the screen of the screen. 如申請專利範圍第22項所述之顯示系統的資料傳遞方 法,其中該些水平空白期間大於等於其最小時間限制。The data transmission party of the display system as described in claim 22 The method wherein the horizontal blank periods are greater than or equal to their minimum time limit. 如申請專利範圍第16項所述之顯示系統的資料傳遞方法,其中依據該影音資料信號的時序及該顯示資料的時序決定輸出對應該第一畫面或該第二畫面的該顯示資料的步驟包括:當對應該第二畫面的一畫面期間的一畫面顯示期間的一起始時間位於對應該第一畫面的一畫面期間的一垂直空白期間內時,該時序控制器輸出對應該第二畫面的該顯示資料。The data transmission method of the display system of claim 16, wherein the step of outputting the display material corresponding to the first picture or the second picture according to the timing of the video data signal and the timing of the display data comprises: : when a start time of a picture display period corresponding to a picture period of the second picture is within a vertical blank period corresponding to a picture period of the first picture, the timing controller outputs the corresponding picture corresponding to the second picture Display data. 如申請專利範圍第24項所述之顯示系統的資料傳遞方法,其中該時序控制器輸出該第二畫面以輸出該顯示資料的步驟包括:當對應該第二畫面的該畫面期間的該畫面顯示期間的該起始時間位於對應該第一畫面的該畫面期間的該垂直空白期間的一第一期間內時,該時序控制器將該第二畫面儲存於該畫面緩衝器,並且讀取儲存於該畫面緩衝器的該第二畫面以輸出該顯示資料。The data transfer method of the display system according to claim 24, wherein the step of the timing controller outputting the second screen to output the display data comprises: displaying the screen during the screen corresponding to the second screen When the start time of the period is within a first period of the vertical blank period corresponding to the picture period of the first picture, the timing controller stores the second picture in the picture buffer, and the reading is stored in The second picture of the picture buffer outputs the display material. 如申請專利範圍第25項所述之顯示系統的資料傳遞方法,更包括:當該畫面緩衝器的存取速度小於該影音資料信號的位元率與該顯示資料的位元率的總和時,該時序控制器降低該顯示資料的位元率,以使該畫面緩衝器的存取速度大於等於該影音資料信號的位元率與該顯示資料的降低後的位元率的總和。The method for transmitting data of the display system according to claim 25, further comprising: when the access speed of the picture buffer is less than a sum of a bit rate of the video data signal and a bit rate of the displayed data, The timing controller reduces the bit rate of the display material such that the access speed of the picture buffer is greater than or equal to a sum of a bit rate of the video material signal and a reduced bit rate of the display data. 如申請專利範圍第26項所述之顯示系統的資料傳遞方法,其中該顯示資料的降低後的位元率小於該影音資料信號的位 元率。The data transmission method of the display system according to claim 26, wherein the reduced bit rate of the display data is smaller than the bit of the video data signal. Yuan rate. 如申請專利範圍第25項所述之顯示系統的資料傳遞方法,其中該時序控制器輸出該第二畫面以輸出該顯示資料的步驟包括:當對應該第二畫面的該畫面期間的該畫面顯示期間的該起始時間位於對應該第一畫面的該畫面期間的該垂直空白期間的一第二期間內時,該時序控制器將該第二畫面儲存於該畫面緩衝器且直接輸出對應該第二畫面的該顯示資料,其中該第一期間與該第二期間不重疊。The data transfer method of the display system according to claim 25, wherein the step of the timing controller outputting the second screen to output the display data comprises: displaying the screen during the screen corresponding to the second screen When the start time of the period is within a second period of the vertical blank period corresponding to the picture period of the first picture, the timing controller stores the second picture in the picture buffer and directly outputs the corresponding The display material of the two screens, wherein the first period does not overlap with the second period. 如申請專利範圍第28項所述之顯示系統的資料傳遞方法,其中該第一期間位於該第二期間之前,該第一期間與該第二期間的總和等於該垂直空白期間,且該第一期間的時間長度等於該垂直空白期間的最小時間限制。The data transfer method of the display system of claim 28, wherein the first period is before the second period, the sum of the first period and the second period is equal to the vertical blank period, and the first The length of time during the period is equal to the minimum time limit during the vertical blank period. 如申請專利範圍第16項所述之顯示系統的資料傳遞方法,更包括:當該影音來源對應該自我更新模式設定該影音控制信號時,該影音來源則不設定該影音資料信號。The method for transmitting data of the display system according to claim 16 further includes: when the video source determines the video control signal corresponding to the self-updating mode, the video source does not set the video data signal.
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