TWI601123B - Display driver and flat panel display - Google Patents

Description

Display driving method and flat panel display

The present invention relates to a driving method for a display, and more particularly to a display driving method for an image signal transmitted in a Display Serial Interface (DSI) format of a Mobile Industry Processor Interface (MIPI).

Referring to FIG. 1, a conventional method for displaying images of an existing mobile device 1, such as a mobile phone, an iPAD, and a tablet computer, is provided by a host terminal 10 through a Mobile Industry Processor Interface (MIPI). A display serial interface (DSI) (hereinafter referred to as MIPI display serial interface) transmits a video signal including a plurality of frame data to a display driving module 21 of the flat display 20, and As shown in FIG. 2, the display driving module 21 generates a vertical synchronization signal VS according to the image signal to control the display frequency of a display panel 22 of the flat panel display 20 according to the vertical synchronization signal VS (that is, display several screens per second). Therefore, one signal period of the vertical sync signal VS is the time for outputting a frame.

As shown in FIG. 2, each frame includes a vertical sync area VSA, a vertical back end area VBP, a display data area DA, and a vertical front end area VFP, and the display driver The module 21 generates the vertical synchronization signal VS according to an interval time of the vertical synchronization area VSA of two adjacent frames, and according to the vertical synchronization signal VS and a preset vertical back end setting value and a vertical front end setting value. A data enable signal DE is generated to output the display data in the display data area DA of each frame to the display panel 22 according to the data enable signal DE.

The vertical rear end area VBP and the vertical front end area VFP of each frame are the time when the display data of the display data area DA is output to the display panel 22 by the host terminal 10, and the vertical rear end setting value and the vertical front end setting value are displayed. The driving module 21 sets the time for outputting the display data of the display data area DA to the display panel 22, that is, the display driving module 21 delays the time represented by the vertical rear end setting value after the synchronous pulse wave of the vertical synchronization signal VS. After that, the display data of the display data area DA is output, and after the display data is outputted, the display of the display data area DA of the next frame is outputted in the same manner after delaying the time represented by the vertical rear end setting value. data.

Therefore, as shown in FIG. 2, when the vertical rear end setting value and the vertical front end setting value preset by the display driving module 21 are different from the time lengths of the vertical rear end region VBP and the vertical front end region VFP set by the host terminal 10, A display material output section VDP of the data enable signal DE generated by the display driver module 21 does not correspond to the display material area DA of the frame, and the screen displayed by the display panel 22 is caused to be upward (the length of the vertical rear end zone). The case is greater than the time corresponding to the backend set value) or the downward shift (the time length of the vertical back end zone is less than the time corresponding to the backend set value).

In order to solve the above problem, since the length of the vertical back end area VBP and the vertical front end area VFP set by the host end 10 cannot be known, it is conventional practice for the engineer to manually adjust the display driving module 21 manually by the field. The vertical rear end setting value and the vertical front end setting value are until the display panel 22 normally displays the screen. However, since the lengths of the vertical rear end region VBP and the vertical front end region VFP of the different types or different types of mobile devices 1 are often different, the engineers must be different types or The different types of mobile devices 1 manually adjust the vertical rear end setting value and the vertical front end setting value preset in the display driving module 21, which is complicated, time-consuming and labor-intensive.

Accordingly, it is an object of the present invention to provide a display driving method capable of automatically adjusting the timing of a driving signal according to a received image signal and a flat panel display using the same.

Therefore, the display driving method of the present invention is applied to a display driving module for driving a display panel, and the display driving module receives an image signal transmitted from a MIPI display serial interface of a host end, and the image signal includes a plurality of image signals. a frame, each frame includes a vertical sync area, a vertical back end area, a display data area and a vertical front end area arranged in sequence; the method comprises: (A) the display driving module is based on the image signal Generating a vertical synchronization signal, and sequentially outputting the display data area of each frame according to the vertical synchronization signal and a preset vertical backend setting value and a vertical front end setting value Displaying data in the display panel; (B) the display driving module detects the first N (N is an integer and N≧2) frames in the image signal, and calculates each of the first N frames a first time length of the vertical rear end region of the frame and a second time length of the vertical front end region; and (C) the display driving module determines that the first time lengths are the same but are set with the vertical back end When the values are different, and the second time lengths are the same but different from the vertical front end setting value, the vertical rear end setting value is updated with the first time length and the vertical front end setting value is updated with the second time length.

In an embodiment of the invention, the vertical sync area includes a vertical sync start packet representing the start of vertical sync and a vertical sync end packet representing the end of vertical sync, and in step (A), the display driver module is The frequency of the vertical synchronization signal is calculated according to the time when the adjacent two vertical synchronization start packets are received, and the vertical synchronization signal is generated accordingly.

In an embodiment of the invention, the display data area includes a plurality of line data areas, each line data area includes a horizontal synchronization area, a horizontal back end area, a pixel data area and a horizontal front end area arranged in sequence. The horizontal synchronization area includes a horizontal synchronization start packet representing the start of horizontal synchronization and a horizontal synchronization end packet representing the end of horizontal synchronization; and in step (B), the vertical back end area refers to the end of the packet from the vertical synchronization Up to the interval of the horizontal synchronization end packet of the first line data area of the display data area, and the display driving module is based on receiving the vertical synchronization end packet and receiving the first of the display data area The horizontal synchronization of the line data area ends The time of the packet is calculated, and the vertical front end area refers to a section from the first horizontal synchronization start packet after the display data area to the vertical synchronization start packet of the next frame, and the The display driver module calculates the second time length according to the time when the first horizontal synchronization start packet is received after receiving the display data area and the time when the vertical synchronization start packet is received in the next frame.

In an embodiment of the present invention, in the step (B), the display driving module calculates the frequency of a horizontal synchronization signal according to the time when the horizontal synchronization start packet is received in the adjacent two line data areas. And generating the horizontal synchronization signal according to the sequence, and sequentially outputting pixel data of the pixel data area in each of the line data areas in the display data area to the display panel according to the horizontal synchronization signal.

In an embodiment of the present invention, in the step (B), the display driving module generates a data enable signal according to the vertical scan signal, the back end setting value and the front end setting value, and according to the data The signal can output the display data of the display data area to the display panel.

Furthermore, the present invention implements a flat-panel display for performing the above method, and is configured to display an image signal transmitted from a serial interface of a MIPI display of a host end, the image signal comprising a plurality of frames, each frame comprising sequentially arranged a vertical sync area, a vertical back end area, a display data area, and a vertical front end area; and the flat panel display includes a display panel and a display driving module, and is electrically connected to the display panel, and according to the image signal Generating a vertical sync signal, and according to the vertical sync signal and the preset one The vertical back end setting value and a vertical front end setting value sequentially output the display data in the display data area of each frame to the display panel; the display driving module also detects the first N pictures in the image signal a frame, and calculating a first time length of the vertical back end region of each of the front N (N is an integer and N≧2) frames and a second time length of the vertical front end region, and Determining that the first time lengths are the same but different from the vertical back end setting values, and the second time lengths are the same but different from the vertical front end setting values, the vertical back end setting values are updated with the first time length The vertical front end set value is updated for the second length of time.

In an embodiment of the invention, the display driving module includes a transmission interface for receiving the image signal, a decoder electrically connected to the transmission interface, a timing controller electrically connected to the decoder, and a timing controller a source driver electrically connected to the timing controller and the display panel, the decoder extracting the vertical synchronization area, the back end data area, the display data area, and the front end from each frame transmitted from the transmission interface a data area, and transmitting the display data area to the timing controller; wherein the vertical synchronization area includes a vertical synchronization start packet representing a start of vertical synchronization and a vertical synchronization end packet representing end of vertical synchronization, the decoder receiving Calculating the frequency of the vertical synchronization signal by two adjacent vertical synchronization start packets, and generating the vertical synchronization signal, and the timing controller according to the vertical synchronization signal and the vertical back end setting value and the vertical The front end set value generates a data enable signal, and controls the source driver to output the display in the display data area according to the data enable signal Feeding to the display panel.

In an embodiment of the invention, the decoder calculates the first time length of the vertical back end region of the first N frames and the second time length of the vertical front end region, and the vertical synchronization signal, The first time length and the second time length are transmitted to the timing controller, and the timing controller determines that the first time lengths are the same but different from the vertical back end setting values, and the second time lengths are the same However, when the vertical front end setting value is different, the vertical rear end setting value is updated with the first time length and the vertical front end setting value is updated with the second time length.

In an embodiment of the invention, the display data area includes a plurality of line data areas, each line data area includes a horizontal synchronization area, a horizontal back end area, a pixel data area and a horizontal front end area arranged in sequence. The horizontal synchronization area includes a horizontal synchronization start packet representing the start of horizontal synchronization and a horizontal synchronization end packet representing the end of horizontal synchronization; the vertical back end region refers to the first packet from the vertical synchronization end packet to the display data area The horizontal synchronization end of the packet of a line data area, and the decoder ends the packet according to the time when the vertical synchronization end packet is received and the first line data area of the display data area is received. And calculating the first time length; and the vertical front end area refers to an interval from the first horizontal synchronization start packet after the display data area to the vertical synchronization start packet of the next frame, and the decoding The device starts to seal according to the first horizontal synchronization start packet after receiving the display data area and the vertical synchronization start of the next frame is received. Time count Calculate the second length of time.

In an embodiment of the present invention, the decoder calculates a frequency of a horizontal synchronization signal according to the time when the horizontal synchronization start packet is received in the adjacent two line data areas, and generates the horizontal synchronization signal and provides the same. Giving the timing controller, and the timing controller controls the source driver to sequentially output pixel data in the pixel data area in each of the line data areas of the display data area to the display panel according to the horizontal synchronization signal. And controlling the display panel by a gate driver built in the display panel according to the horizontal synchronization signal.

The effect of the invention is that the display driving module automatically detects the length of the vertical back end area and the vertical front end area set in the frame of the image signal from the host end, and the preset vertical back end setting value and The vertical front end setting value is compared, and the vertical rear end setting value is updated to coincide with the length of the vertical rear end area, and the vertical front end setting value is updated to be consistent with the vertical front end area, so that the display panel can be maintained. Normal display, and therefore does not require the engineer to manually adjust the vertical rear end setting value and the vertical front end setting value preset in the display driving module for different types or different types of mobile devices, not only shortening the product adjustment time and saving A large amount of labor costs are achieved to achieve the object of the present invention.

3‧‧‧Mobile devices

30‧‧‧Host side

40‧‧‧ flat panel display

41‧‧‧ display panel

42‧‧‧Display driver module

43‧‧‧Transport interface

44‧‧‧Decoder

VSE‧‧‧Vertical Synchronization End Packet

LA‧‧‧Line data area

HSA‧‧‧Horizontal Synchronization Zone

HSS‧‧‧ horizontal synchronization start packet

HSE‧‧‧ horizontal synchronization end packet

HBP‧‧‧ horizontal back end area

HFP‧‧‧ horizontal front end zone

45‧‧‧Timing controller

46‧‧‧Source Driver

411‧‧‧gate driver

VSA‧‧‧ vertical sync area

VBP‧‧‧Vertical back end zone

DA‧‧‧Display area

VFP‧‧‧Vertical front end zone

VSS‧‧‧Vertical Synchronization Start Packet

PA‧‧‧Pixel data area

VS‧‧‧ vertical sync signal

VBS‧‧‧Vertical backend setpoint

VFS‧‧‧Vertical front end setting

DE‧‧‧Information enable signal

VDP‧‧‧ Display data output interval

HS‧‧‧ horizontal scanning signal

S1~S6‧‧‧Steps

Other features and effects of the present invention will be apparent from the embodiments of the drawings, wherein: 1 is a circuit block diagram illustrating a conventional display driver module applied to a mobile device; FIG. 2 is a timing diagram illustrating the content of the frame included in the image signal and the vertical sync signal generated according to the frame FIG. 3 is a circuit block diagram showing an embodiment of the flat panel display of the present invention applied to a mobile device; FIG. 4 is a circuit block diagram showing components mainly included in the display driving module of the embodiment; FIG. The sequence diagram of the video signal frame of the embodiment and the vertical synchronization signal and the horizontal synchronization signal generated according to the frame; and FIG. 6 is a flowchart illustrating the display driving module according to the embodiment according to the frame The first time length of the vertical rear end region and the second time length of the vertical front end region update the vertical rear end setting value of the vertical synchronization signal and the vertical front end setting value.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3 to FIG. 6 , an embodiment of the display driving method of the present invention is applied to a mobile device 3 including a host end 30 and a flat display 40 of the present invention as shown in FIG. 3 . An embodiment mainly includes a display panel 41 and a display driving module 42 for driving the display panel 41, and as shown in FIG. It is shown that in the embodiment, the display panel 41 has a Gate Driver on Array (GOA) 411 built therein. The display driver module 42 mainly includes a transmission interface 43, a decoder 44 electrically connected to the transmission interface 43, a timing controller 45 electrically connected to the decoder 44 and the gate driver 411, and a The timing controller 45 and the source driver 46 electrically connected to the display panel 41.

The transmission interface 43 is a MIPI display serial interface (DSI), which is electrically coupled to the host terminal 30 to receive an image signal transmitted by the MIPI display serial interface of the host terminal 30. As shown in FIG. 5, the image signal includes a plurality of frames, each frame including a vertical synchronization area VSA, a vertical back end area VBP, a display data area DA, and a vertical front end. District VFP.

The display driving method of this embodiment is as shown in FIG. 6. First, after the display driving module 42 is activated, the transmission interface 43 receives the image signal from the host terminal 30 and transmits it to the decoder 44, and the steps of FIG. 6 are performed. As shown in S1, the display driving module 42 generates a vertical synchronization signal VS according to the image signal, and sequentially outputs each according to the vertical synchronization signal VS and a preset vertical backend setting value VBS and a vertical front end setting value VFS. The display material in the display data area of a frame is displayed to the display panel 41. Specifically, the decoder 44 takes out the vertical synchronization area VSA, the vertical back end area VBP, the display data area DA, and the vertical front end area VFP from each frame transmitted from the transmission interface 43 and The display material area DA is transmitted to the timing controller 45.

As shown in FIG. 5, the vertical synchronization area VSA refers to a section from a vertical synchronization start packet VSS which represents vertical synchronization to a vertical synchronization end packet VSE which represents the end of vertical synchronization, so that the decoder 44 can After receiving the two adjacent vertical synchronization start packets VSS, the frequency of the vertical synchronization signal VS is calculated, and the vertical synchronization signal VS is generated accordingly. The timing controller 45 generates a data enable signal DE according to the vertical sync signal VS and the vertical back end set value VBS and the vertical front end set value VFS, and controls the output of the source driver 46 according to the data enable signal DE. The display material in the display material area DA is displayed on the display panel 41.

As shown in step S2 of FIG. 6 , the display driving module 42 detects and records the first N frames in the image signal, where N is an integer and N ≧ 2, and the N value can be adjusted according to actual needs. Then, the display driving module 42 performs step S3 of FIG. 6 to calculate a first time length of the vertical back end region VBP of each of the first N frames and a second time of the vertical front end region VFP. length.

Specifically, as shown in FIG. 5, the display data area DA includes a plurality of line data areas LA. For example, if the resolution of the display panel 41 is 1920×1080 pixels, the display data area DA will include 1080 line data areas. LA. Each of the line data areas LA includes a horizontal synchronization area HSA, a horizontal back area HBP, a pixel data area PA and a horizontal front end area HFP, wherein the horizontal synchronization area HSA includes a horizontal synchronization start. Horizontal synchronization starts to pack HSS and generation The horizontal synchronization end packet HSE of the horizontal synchronization end of the table includes a plurality of pixel data. For example, if the resolution of the display panel 41 is 1920×1080 pixels, the pixel data area PA will include 1920 pixel data.

And the vertical back end area VBP refers to the interval from the vertical synchronization end packet VSE to the horizontal synchronization end packet HSE of the first line data area LA of the display data area DA, and therefore, the decoder 44 can receive The first time length of the vertical back end region VBP is calculated by the time when the vertical synchronization end packet VSE is received and the horizontal synchronization end packet HSE of the first line data area LA of the display data area DA is received. .

The vertical front end area VFP refers to the interval from the first horizontal synchronization start packet HSS after the display data area DA to the vertical synchronization start packet VSS of the next frame, and therefore, the decoder 44 can receive the packet according to the reception. The time after the first horizontal synchronization start packet HSS after the data area DA is displayed and the time when the vertical synchronization start packet VSS of the next frame is received is calculated, and the second time length of the vertical front end region VFP is calculated.

Next, in step S4 of FIG. 6, the timing controller 45 of the display driving module 42 determines whether the first time lengths are the same and whether the second time lengths are the same. If not, the process returns to step S1, and if so, Step S5 is performed to further determine whether the first time length is the same as the vertical back end setting value VBS and whether the second time length is the same as the vertical front end setting value VFS, and if yes, return Step S1, if not, indicating that the display data output interval VDP of the data enable signal DE generated does not correspond to the display data area DA of the frame, which may cause the screen displayed by the display panel 41 to shift upward or downward. Therefore, the timing controller 45 of the display driving module 42 performs step S6 to update the vertical backend setting value VBS with the first time length, and updates the vertical front end setting value VFS with the second time length, so that After the display data output section VDP of the data enable signal DE corresponds to the display data area DA of the frame, the process returns to step S1.

Thereby, the vertical rear end setting value VBS preset in the timing controller 45 and the vertical front end setting value VFS are different from the vertical back end area VBP and the vertical front end area VFP in the received image signal. The timing controller 45 can automatically and instantaneously adjust the vertical back end set value VBS and the vertical front end set value VFS to be the same as the length of the vertical back end area VBP and the vertical front end area VFP in the image signal. The display data output section VDP of the enable signal DE can be associated with the timing of the display data area DA of the image signal, so that the display panel 41 can display the screen normally without causing the display screen to shift upward or downward.

In addition, the decoder 44 of the display driving module 42 further calculates the frequency of a horizontal synchronization signal HS according to the time when the horizontal synchronization start of the HSS is received from the adjacent two line data areas LA, and the level is generated accordingly. The synchronization signal HS is supplied to the timing controller 45, so the timing controller 45 controls the source driver 46 to sequentially output each of the display data areas DA according to the horizontal synchronization signal HS. The pixel data of the pixel data area PA in the data area LA is sent to the display panel 41, and the gate driver 411 built in the display panel 41 is controlled to synchronously drive the display panel 41 according to the horizontal synchronization signal HS, that is, horizontally During a signal period of the synchronization signal HS, the source driver 46 outputs the pixel data of the pixel data area PA in the line data area LA to the display panel 41, and the gate driver 411 synchronously drives the display panel 41. A column of pixels corresponding to the line data area LA causes pixel data of the pixel data area PA in the line data area LA to be displayed.

It is to be noted that the vertical rear end set value VBS, the vertical front end set value VFS, the vertical back end area VBP and the vertical front end area VFP are represented by a signal period of the horizontal synchronization signal HS. For example, as shown in FIG. 5, it is assumed that the vertical back end setting value VBS is five signal periods of the horizontal synchronization signal HS, and the vertical front end setting value VFS is four signal periods of the horizontal synchronization signal HS, and the vertical back end area VBP includes 7 horizontal signal periods of the horizontal synchronization signal HS, the vertical front end area VFP includes 6 signal periods of the horizontal synchronization signal HS, then the timing controller 45 only needs to update the vertical back end setting value VBS to 7 signal periods, and the The vertical front end set value VFS is updated to six signal periods, so that the display data output interval VDP of the enable signal DE corresponds to the timing of the display data area DA of the video signal.

In summary, the present invention automatically detects the vertical back end region VBP and the vertical front end region set in the frame of the image signal from the host terminal 30 by the display driving module 42. The length of the VFP is compared with the preset vertical backend set value VBS and the vertical front end set value VFS, and the vertical backend set value VBS is instantly updated to coincide with the length of the vertical back end region VBP, and The vertical front end set value VFS is updated to coincide with the length of the vertical front end area VFP, so that the display panel 41 can maintain the normal display, so that in the production stage of the mobile device 3, that is, no engineering personnel are required for different types or different types of mobile devices 3 Manually adjusting the vertical rear end setting value VBS preset in the display driving module 42 and the vertical front end setting value VFS can not only shorten the product adjustment time but also save a lot of labor costs, so the object of the present invention is achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

S1~S6‧‧‧Steps

Claims (10)

A display driving method is applied to a display driving module for driving a display panel, and the display driving module receives a display serial interface of a mobile industry processor interface (MIPI) of a host side ( The image signal transmitted by the Display Serial Interface (DSI), the image signal includes a plurality of frames, each frame includes a vertical sync area, a vertical back end area, a display data area and a vertical front end arranged in sequence. The method includes: (A) the display driving module generates a vertical synchronization signal according to the image signal, and sequentially outputs the vertical synchronization signal according to the vertical synchronization signal and a preset vertical backend setting value and a vertical front end setting value. Displaying data in the display data area of each frame to the display panel; (B) the display driving module detects the first N (N is an integer and N≧2) frames in the image signal, and calculates a first time length of the vertical rear end region of each of the first N frames and a second time length of the vertical front end region; and (C) the display driving module determining the first time If the degrees are the same but different from the vertical back end setting, and the second time lengths are the same but different from the vertical front end setting values, the vertical back end setting values are updated with the first time length and the second time The length updates the vertical front end setting. The display driving method according to claim 1, wherein the vertical synchronization area refers to an interval between a vertical synchronization start packet starting from vertical synchronization and a vertical synchronization end packet representing end of vertical synchronization, and in step (A) The display driver module is based on receiving two adjacent vertical syncs The time at which the packet is started is calculated, and the frequency of the vertical sync signal is calculated, and the vertical sync signal is generated accordingly. The display driving method of claim 2, wherein the display data area comprises a plurality of line data areas, each line data area comprising a horizontal synchronization area, a horizontal back end area, a pixel data area and a sequence a horizontal front end region, wherein the horizontal synchronization area includes a horizontal synchronization start packet representing a start of horizontal synchronization and a horizontal synchronization end packet representing a horizontal synchronization end; and in step (B), the vertical rear end region refers to the vertical The synchronization end packet is sent to the interval of the horizontal synchronization end packet of the first line data area of the display data area, and the display driving module is based on receiving the vertical synchronization end packet and receiving the display data area. The horizontal synchronization end packet of the first line data area is calculated to obtain the first time length; and the vertical front end area refers to the first horizontal synchronization start packet after the display data area to the next frame. The vertical synchronization starts the interval before the packet, and the display driver module starts the packet according to the first horizontal synchronization after receiving the display data area. And the time when the vertical synchronization start packet of the next frame is received, and the second time length is calculated. According to the display driving method of claim 3, in step (B), the display driving module calculates the frequency of a horizontal synchronization signal according to the time when the horizontal synchronization start packet is received in the adjacent two line data areas. And generating the horizontal synchronization signal, and sequentially outputting pixel data in the pixel data area in each of the line data areas in the display data area to the display panel according to the horizontal synchronization signal. The display driving method of claim 3, in the step (B), the display driving module generates a data enable signal according to the vertical synchronization signal, the backend setting value and the front end setting value, and according to the data The enable signal outputs the display data of the display data area to the display panel. A flat-panel display for displaying an image signal transmitted by a Display Industry Interface (DSI) of a mobile industry processor interface (MIPI) of a host computer, the image signal includes a plurality of video signals a frame, each frame includes a vertical sync area, a vertical back end area, a display data area and a vertical front end area arranged in sequence; and the flat display comprises: a display panel; and a display driving module The device is electrically connected to the display panel, and generates a vertical synchronization signal according to the image signal, and sequentially outputs each frame according to the vertical synchronization signal and a preset vertical rear end setting value and a vertical front end setting value. Displaying data in the display data area to the display panel; the display driving module further detecting the first N frames in the image signal, and calculating the front N (N is an integer and N≧2) frames a first time length of the vertical rear end region of each of the frames and a second time length of the vertical front end region, and determining that the first time lengths are the same but after the vertical Setting different values, and the second time the same length, but these are different, the first length of time to update the setting value of the vertical rear end of the front end of the vertical length of the set value and a second time to update the set value of the vertical front end. The flat panel display of claim 6, wherein the display driving module includes a transmission interface for receiving the image signal, and is electrically connected to the transmission interface. Connected decoder, a timing controller electrically connected to the decoder, and a source driver electrically connected to the timing controller and the display panel, the decoder is taken out from each frame transmitted from the transmission interface The vertical synchronization area, the vertical back end area, the display data area and the vertical front end area, and the display data area is transmitted to the timing controller; wherein the vertical synchronization area refers to vertical synchronization starting from a vertical synchronization Starting from the interval before the vertical synchronization end packet representing the end of the vertical synchronization, the decoder calculates the frequency of the vertical synchronization signal according to the time when the adjacent two vertical synchronization start packets are received, and generates the vertical Synchronizing the signal, and the timing controller generates a data enable signal according to the vertical sync signal and the vertical back end set value and the vertical front end set value, and controls the source driver to output the display data area according to the data enable signal Display data in the display panel. The flat panel display of claim 7, wherein the decoder calculates the first time length of the vertical back end region of the first N frames and the second time length of the vertical front end region, and synchronizes the vertical The signal, the first length of time, and the second length of time are transmitted to the timing controller, the timing controller determining that the first time lengths are the same but different from the vertical back end setting values, and the second time When the length is the same but different from the vertical front end setting value, the vertical rear end setting value is updated with the first time length and the vertical front end setting value is updated with the second time length. The flat panel display of claim 7, wherein the display data area comprises a plurality of line data areas, each line data area comprising a horizontal synchronization area, a horizontal back end area, a pixel data area and a level arranged in sequence Front end area The horizontal synchronization area includes a horizontal synchronization start packet representing the start of horizontal synchronization and a horizontal synchronization end packet representing the end of horizontal synchronization; the vertical back end region refers to the first packet from the vertical synchronization end packet to the display data area The horizontal synchronization end of the packet data area ends the packet interval, and the decoder ends the packet according to the time when the vertical synchronization end packet is received and the first line data area of the display data area is received. Time, the first time length is calculated; and the vertical front end area refers to an interval from the first horizontal synchronization start packet after the display data area to the vertical synchronization start packet of the next frame, and the decoder The second time length is calculated according to the time when the first horizontal synchronization start packet is received after receiving the display data area and the time when the vertical synchronization start packet is received in the next frame. The flat panel display according to claim 9, wherein the decoder calculates a frequency of a horizontal synchronization signal according to the time when the horizontal synchronization start packet is received in the adjacent two line data areas, and the horizontal synchronization signal is generated accordingly. And the timing controller is configured to control, according to the horizontal synchronization signal, the source driver to sequentially output pixel data in the pixel data area in each line data area of the display data area to the display. a panel, and controlling the display panel by a gate driver built in the display panel according to the horizontal synchronization signal.