TWI769699B - Scanning display, driving device and driving method thereof - Google Patents

Abstract

A scanning type display includes a backlight module with a common anode structure, a display module, a control module and a driving module, the backlight module includes a plurality of scanning lines and a plurality of data lines respectively correspondingly disposed on the A plurality of light emitting diodes between the defined matrices. The control module generates an image stream and a synchronization control signal. The driving module receives an input voltage and is electrically connected to the control module to receive the synchronization control signal and the image stream, and the drive module sequentially outputs the input voltage according to the synchronization control signal and the image stream To the scanning lines of each row of the backlight module, the backlight module emits light in a row scanning manner, and the driving module also generates an image according to the synchronous control signal and the input voltage output to the scanning line of the last row an update signal, the image update signal is related to the image update of the display module.

Description

Scanning display, driving device and driving method thereof

The present invention relates to a display technology in the field of light emitting diodes, in particular to a scanning display and a driving device and driving method thereof.

A conventional driving device for driving a scanning display to display images includes a control module and a driving module. The driving module receives a synchronization control signal related to image display and updating from the control module, and receives an image stream from the control module. The image stream has a plurality of image data related to the picture to be displayed by the scanning display. The driving module drives the scanning display according to the synchronization control signal and the image stream, so that a backlight module including a light-emitting diode array in the scanning display is controlled by the synchronization control signal. At the same time, it becomes brighter or darker, and a display module in the scanning display performs image display and update of the image data of the image stream according to the frequency of the synchronization control signal. The synchronization control signal is a vertical synchronization (V-sync) periodic signal, and its frequency is, for example, 60 Hz, that is to say, the scanning display periodically updates the displayed picture. a screen frame rate and the synchronization control signal the same frequency.

However, when the synchronization control signal is an aperiodic signal, and the backlight module is a scanning backlight module that is triggered by the synchronization control signal and adopts scanning control to emit light row by row in sequence, the above-mentioned conventional scanning display The driving method may cause tearing or interruption of the picture displayed by the display module. Therefore, there is still room for improvement in the driving method of the existing scanning display.

Therefore, a first objective of the present invention is to provide a scanning display that can avoid tearing or interruption of the picture displayed by the scanning display.

Therefore, the scanning display of the present invention includes: a backlight module, a display module and a driving device.

The backlight module includes a light-emitting diode array with a common anode structure, and the light-emitting diode array includes: a plurality of scan lines arranged along a row direction with each other, a plurality of data lines arranged perpendicular to the scan lines along a column direction with each other, a plurality of light emitting diodes respectively disposed between the matrix defined by the plurality of scan lines and the plurality of data lines, each light emitting diode has an anode electrically connected to the corresponding scan line, and A cathode of the corresponding data line is electrically connected. The display module is used for displaying images.

The driving device includes a control module and a driving module. The control module generates an image stream and a synchronization control signal.

The driving module receives an input voltage and is electrically connected to the backlight module and the display module, and is electrically connected to the control module to receive the synchronous control signal and the image stream. The driving module is based on the synchronous control signal, In the image stream, the input voltage is sequentially output to the scan lines of each row of the backlight module, so that the backlight module emits light in a row scanning manner. The input voltage of one row of scan lines generates an image update signal, and the image update signal is related to the image update of the display module.

Therefore, the second object of the present invention is to provide a driving method of a scanning display. Executed by a driving module, the scanning display includes a light emitting diode array with a common anode structure.

Therefore, the driving method of the scanning display includes the following steps: (A) receiving and temporarily storing an image stream from a control module. (B) Receive a synchronization control signal from the control module. (C) outputting the input voltage to each row of the LED array in sequence according to the synchronization control signal, the image stream and a clock signal related to the line scan switching of the scanning display scan lines, so that the light-emitting diode array emits light in a row scanning manner. (D) According to the synchronization control signal and the input voltage output to the scan line of the last row, an image update signal is generated, and the image update signal is related to the image update of the scanning display.

The third object of the present invention is to provide a scanning display that emits light directly without liquid crystal display.

Therefore, the scanning display includes a light-emitting diode direct display module and a driving device.

The LED direct display module includes a plurality of scan lines arranged along a row direction with each other, a plurality of data lines arranged perpendicular to each other along a column direction on the scan lines, a plurality of correspondingly arranged on the scan lines by the plurality of scan lines With the light emitting diodes between the matrixes defined by the plurality of data lines, each light emitting diode has an anode electrically connected to the corresponding scan line, and a cathode electrically connected to the corresponding data line. The driving device includes a control module and a driving module.

The control module generates an image stream and a synchronization control signal. The driving module is electrically connected to the LED direct display module, and is electrically connected to the control module to receive the synchronization control signal and the image stream. The drive module is based on the synchronization control signal and the image stream. , the input voltage is sequentially output to the scan lines of each row of the LED direct display module, so that the LED direct display module emits light in a row scanning manner, and the driving module is also controlled according to the synchronization signal and the input voltage output to the scan line of the last row, generate an image update signal, and generate a plurality of driving signals to the LED direct display module according to the image update signal and the image stream the multiple data lines.

The effect of the present invention is that the circuit structure for driving the light emitting diode (LED) array with the common anode structure not only has high product versatility and lower cost, but also performs image display and update according to the image update signal. , which can prevent the screen displayed by the display module from being suddenly cut off due to the synchronization control signal, and then the display module There will be no image tearing or interruptions.

10: LED direct display module

11: Backlight module

SU: Scanning Unit

S1~S3: Scan switch

116: Light Emitting Diode

12: Display module

2: drive unit

21: Control module

22: Driver module

221: storage unit

222: first drive signal generator

223: second drive signal generator

224: Phase Locked Loop Circuit

S~E: Steps

C1~C3: Substeps

D1~Dn: drive signal

Do: output signal

Dr: Image Streaming

Draw: Image data

SW1~SW3: switch signal

t: time

Vin: input voltage

Draw_update: image update signal

VSYNC: Synchronization control signal

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a circuit diagram of a first embodiment of a scanning display of the present invention; FIG. 2 is the first embodiment Fig. 3 is the flow chart of the driving method of a scanning-type display performed by a driving module of the first embodiment; Fig. 4 is the flow chart of the driving method emitting light in a row scanning manner to the backlight module 5 is a circuit diagram of a second embodiment of a scanning display of the present invention.

Referring to FIGS. 1 and 2 , an embodiment of the scanning display of the present invention is suitable for image display. The scanning display (eg, a liquid crystal display) supports a dynamic frame rate and includes a backlight module 11, a display module 12 (eg, a liquid crystal display panel) for displaying images, and a Drive 2.

The backlight module 11 includes a light-emitting diode array with a common anode structure, and the light-emitting diode array includes: a plurality of scan lines arranged along a row direction with each other, A plurality of data lines and a plurality of light emitting diodes 116 are vertically disposed on the scan lines in a row direction. A plurality of light emitting diodes 116 are respectively disposed between the matrix defined by the plurality of scan lines and the plurality of data lines, and each light emitting diode 116 has an anode electrically connected to the corresponding scan line, and a cathode that is electrically connected to the corresponding data line.

The driving device 2 includes a control module 21 and a driving module 22 .

The control module 21 generates a synchronization control signal VSYNC, and an internal graphics processing unit (GPU, not shown) generates an image stream Dr with a plurality of image data Draw. The image stream Dr is related to the picture to be displayed by the display module 12 . In this embodiment, the control module 21 sequentially outputs the image data as the image stream Dr.

The driving module 22 is used to electrically connect the backlight module 11 and the display module 12, and is electrically connected to the control module 21 to receive the synchronization control signal VSYNC and the image stream Dr, and to drive the backlight accordingly The module 11 and the display module 12 . The driving module 22 sequentially outputs the input voltage Vin to the scan lines of each row of the backlight module 11 according to the synchronization control signal VSYNC and the image stream Dr, so that the backlight module 11 scans in a row To emit light, the driving module 22 also generates an image update signal Draw_update according to the synchronization control signal VSYNC and the input voltage Vin output to the scan line of the last row, and the image update signal Draw_update is related to the display module 12 Image update.

In this embodiment, the driving module 22 includes a scanning unit SU, a storage The storage unit 221 , a first driving signal generator 222 , and a second driving signal generator 223 are included.

The scanning unit SU receives a plurality of switching signals SW1 ˜ SW3 and the input voltage Vin, is electrically connected to each scanning line of the backlight module 11 , and is controlled by the plurality of switching signals SW1 ˜ SW3 to sequentially output the input voltage Vin to the scan lines of each row of the backlight module 11 . The scan unit SU includes a plurality of scan switches S1 to S3 corresponding to the plurality of scan lines, each scan switch has a first end for receiving the input voltage Vin, and a second end electrically connected to the corresponding scan line , and a control terminal that receives the corresponding switching signal, and switches between conduction and non-conduction according to the switching signal, and the scanning unit SU and the first driving signal generator 222 and the second driving signal generator 223 Integrate the process on a single chip.

The first driving signal generator 222 is electrically connected to the scanning unit SU and the control module 21, and has a phase-locked loop circuit 224 that generates the clock signal. The first driving signal generator receives the synchronization control signal and the diagram image stream, and according to the synchronization control signal VSYNC, the image stream Dr and the clock signal, generate the plurality of switching signals S1~S3, and also according to the synchronization control signal and the switching corresponding to the last row of scanning lines signal, the image update signal Draw_update is generated. The first driving signal generator 222 has a phase-locked loop circuit 224 . The phase-locked loop circuit 224 generates a clock signal related to the line-to-scan switching of the backlight module 11 .

The second driving signal generator 223 is electrically connected to the first driving signal generator 222 to receive the image update signal Draw_update, and generate the output signal Do according to the image update signal Draw_update and the image stream Dr. It should be noted that the second driving signal generator 223 is a driving circuit including a source driver and a gate driver, and is well known to those skilled in the art, so it is not repeated here. And the second drive signal generator 223 generates an update signal to the first drive signal generator 222 according to the image update signal, so that the first drive signal generator 222 generates the drive signals D1-Dn to the backlight module The time point of the group is determined by the update signal from the second driving signal generator 223 .

The storage unit 221 is electrically connected to the control module 21 and the first and second driving signal generators 222 and 223 , and receives and temporarily stores the image stream Dr from the control module 21 . In addition, the storage unit 22 has two memories SRAMA and SRAMB for temporarily storing the frames Draw1 to Draw4 of the image stream Dr, that is, the frames temporarily stored by SRAMA and SRAMB are displayed in turn. It is further explained here that the first frame Draw1 is displayed after the first Draw_update, and the second frame Draw2 is temporarily stored in the memory SRAMB; the second frame Draw2 is displayed after the second Draw_update, and the third frame Draw3 is temporarily stored. Stored in the memory SRAMA; after the third Draw_update, the third frame Draw3 is displayed, and the fourth frame Draw4 is temporarily stored in the memory SRAMB; and so on. To further illustrate the signal flow between the driving signal generators 222 and 223 and the storage unit 221 , when the second driving signal generator 223 receives the first image update signal generated by the first driving signal generator 222 Draw_update, sends an update signal to the first drive signal generator 222, and transmits the first frame Draw1 of the image stream Dr temporarily stored in the storage unit 221 to the first drive generator 222, and the first drive generator 222 updates according to the The signals and the first frame Draw1 generate driving signals D1 to Dn to the data lines of the backlight module.

Referring to FIG. 3 , the driving module 22 executes a driving method of a scanning display to drive the scanning display to perform image display and update. The driving method includes a step S, a step A, a step B, a step C, a One step D, one step E.

In step S, the phase-locked loop circuit 224 of the driving signal generator 222 of the driving module 22 generates the clock signal.

In step A, the storage unit 221 of the driving module 22 receives the image stream Dr from the control module 21 and temporarily stores the image stream Dr.

In step B, the driving signal generator 222 of the driving module 22 receives the synchronization control signal VSYNC and the image stream Dr from the control module 21 and the storage unit 221 respectively.

In step C, the driving module 22 receives an input voltage Vin and sequentially outputs the input voltage according to the synchronization control signal VSYNC, the image stream Dr temporarily stored in the storage unit 221, and the clock signal The scanning lines to each row of the LED array make the backlight module 11 emit light in a row scanning manner. As shown in FIG. 4 , this step C includes the following sub-steps 341 to 343 .

In sub-step C1, the drive signal generator 222 controls according to the synchronization The signal VSYNC and the clock signal generate the switching signals SW1-SW3. In this embodiment, each of the switching signals SW1 ˜ SW3 is a pulse signal having a plurality of square waves, and the pulse width thereof is an integer multiple of a period of the clock signal. In each line scanning period of the backlight module 11 , the pulse waves of the switching signals SW1 ˜ SW3 are interlaced. In addition, the first pulse of the synchronization control signal VSYNC triggers the switching of the switching signals SW1 ˜ SW3 .

In sub-step C2, the driving signal generator 222 generates the driving signals D1-Dn according to the image stream Dr and the clock signal. In this embodiment, each of the driving signals D1 ˜Dn is a pulse wave signal having a plurality of square waves, and the pulse wave width thereof is an integer multiple of the period of the clock signal, and the The integer multiple varies with the image stream Dr.

In sub-step C3, the driving signal generator 222 outputs the switching signals SW1-SW3 to the control terminals of the scanning switches S1-S3, respectively, and outputs the driving signals D1-Dn to the light-emitting two The cathodes of the plurality of light emitting diodes 116 corresponding to each in the polar body array are used to drive the light emitting diode array of the backlight module 11 to emit light row by row. It should be noted that each row of the light-emitting diode array of the backlight module 11 is defined as each column (ie, each horizontal row) of the light-emitting diodes 116 in the light-emitting diode array. .

In step D, the driving signal generator 222 of the driving module 22 according to the synchronization control signal VSYNC and the last one of the switching signals SW1˜SW3 The switching signal (ie, the switching signal SW3 ) generates and outputs an image update signal Draw_update to the driving signal generator 223 , and the image update signal Draw_update is related to the image of the display module 12 of the scanning display 1 renew.

In this embodiment, as shown in FIG. 2 , the last switching signal SW3 corresponds to the last line of the line scanning performed by the scanning display 1 when emitting light. Each of the synchronization control signal VSYNC and the image update signal Draw_update is a pulse wave signal with a plurality of square waves. The driving signal generator 222 generates the image update signal Draw_update in such a way that each square wave of the image update signal Draw_update lags a corresponding square wave of the synchronization control signal VSYNC, and the image update signal Draw_update is excepted A start point of each square wave other than the first square wave coincides with an end point of the square wave of the switching signal SW3 (ie, the last switching signal of the switching signals SW1 ˜ SW3 ). The end point of the square wave of the switching signal SW3 occurs immediately after a start point of the corresponding square wave of the synchronization control signal VSYNC.

In step E, the drive signal generator 223 of the drive module 22 generates and outputs an output signal Do to the scan according to the image update signal Draw_update and the image stream Dr temporarily stored in the storage unit 221 The display module 12 of the type display 1 is used to drive the display module 12 to perform image display and update according to the output signal Do, so that the display module 12 follows the change of the image update signal Draw_update and update the displayed image.

It should be added that, in this embodiment, step S is performed before step A, but it is not limited to this. In other embodiments, step S may also be performed between step A and step B, or performed between step B and step C.

As shown in FIG. 5 , a second embodiment of the scanning display 1 of the present invention is a direct display without liquid crystal display. The difference from the first embodiment is that there is no display module like a liquid crystal display panel, but a A light-emitting diode direct display module 10 replaces the backlight module 11 of the first embodiment; and there is no second driving signal generator 223, but the first driving signal generator 223 internally generates an image update signal Draw_update, and According to the image update signal Draw_update, it determines the time point when the driving signals D1~Dn are generated to the LED direct display module 10. That is to say, the first driving signal generator also outputs according to the synchronization control signal and output The input voltage to the scan line of the last row generates an image update signal Draw_update, and according to the image update signal Draw_update and the image stream, a plurality of driving signals D1~Dn are generated to the LED direct display mode the multiple data lines of the group.

To sum up, the above embodiments have the following advantages:

1. The mainstream light-emitting diode display applications in the market are light-emitting diode (LED) arrays with a common anode structure occupying the largest proportion, so that the driving device in this case has high product versatility and lower costs. 2. If the line scan signals (SW1~SW3) are output by the first driving module, the hardware design and software setting of the control module can be greatly reduced. the complexity.

3. The scanning unit, the first driving signal generator and the second driving signal generator are integrated into a single chip, which can effectively reduce the layout space and the number of components on the printed circuit board (PCB), and is more suitable for high resolution The application of LED display modules with small pitches greatly reduces the error rate of printing parts and indirectly improves the overall yield; and the PCB layout of the backlight/display module is simplified, which reduces the evaluation time in the R&D stage and greatly improves the time for commercialization. In addition, for small-sized consumer electronic display devices, it can meet the requirements of higher resolution under the condition of limited layout space, that is, the supported LED arrangement density becomes higher). In addition, solving the problem of matching the power supply unit of the external line scan transistor (MOS) component helps to greatly improve the research and development efficiency of the overall system module.

4. The driving method is to make the display module 12 update the displayed image according to the change of the image update signal Draw_update, that is to say, the picture displayed by the display module 12 will be displayed in the backlight module 11 After the corresponding last line scan is completed (ie, corresponding to an end point of a corresponding one of the square waves of the switching signal SW3), the displayed picture will be updated, and then the displayed image of the display module 12 will be updated. The picture will not be updated when the line scan corresponding to the backlight module 11 is not finished due to the synchronization control signal VSYNC, so that the picture displayed by it can be prevented from being suddenly cut off and the situation of image tearing or interruption occurs. Therefore, the driving method of the scanning display of the present invention has better image display than the driving method of the existing display (which causes image tearing or interruption due to image display and update according to the synchronization control signal VSYNC).

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

11: Backlight module

SU: Scanning Unit

S1~S3: Scan switch

116: Light Emitting Diode

12: Display module

2: drive unit

21: Control module

22: Driver module

221: storage unit

222: first drive signal generator

223: second drive signal generator

224: Phase Locked Loop Circuit

Claims (11)

A scanning display, comprising: a backlight module, including a light emitting diode array with a common anode structure, the light emitting diode array comprising: a plurality of scanning lines, arranged along a row direction with each other, a plurality of data lines, along a column with each other The direction is perpendicular to the scan lines, a plurality of light emitting diodes are respectively correspondingly arranged between the matrix defined by the plurality of scan lines and the plurality of data lines, and each light emitting diode has an electrical connection. The corresponding anode of the scan line is electrically connected to the corresponding cathode of the data line; a display module is used for displaying images; a driving device includes: a control module, which generates an image stream, and a synchronization control signal; and a drive module, which receives an input voltage and is electrically connected to the backlight module and the display module, and is electrically connected to the control module to receive the synchronization control signal and the image stream, the The driving module sequentially outputs the input voltage to the scan lines of each row of the backlight module according to the synchronous control signal and the image stream, so that the backlight module emits light in a row scanning manner, and the driving module also According to the synchronization control signal and the input voltage output to the scan line of the last row, an image update signal is generated, and the image update signal is related to the image update of the display module. The scanning display of claim 1, wherein the driving module further generates an output signal to the display module according to the image update signal and the image stream, so as to drive the display module to perform images Display and update, so that the display module follows the change of the image update signal to update the displayed image. The scanning display of claim 1, wherein the driving module comprises: a scanning unit, which receives a plurality of switching signals and the input voltage and is electrically connected to each scanning line of the backlight module, and receives the plurality of switching signals and the input voltage. The switching signal is controlled to sequentially output the input voltage to the scanning lines of each row of the backlight module; a first driving signal generator is electrically connected to the scanning unit and the control module, and has a clock signal generator for generating a clock signal. a phase-locked loop circuit, the first driving signal generator receives the synchronization control signal and the image stream, and generates the plurality of switching signals according to the synchronization control signal, the image stream and the clock signal, and Also according to the synchronization control signal and the switching signal corresponding to the last row of scan lines, the image update signal is generated, and a second drive signal generator is electrically connected to the first drive signal generator to receive the image update signal, And according to the image update signal and the image stream, an output signal is generated. The scanning display of claim 3, wherein the scanning unit comprises a plurality of scanning switches corresponding to the plurality of scanning lines, each scanning switch has a first end receiving the input voltage, an electrical connection corresponding to The second end of the scan line, and a control corresponding to the switching signal received The terminal is switched between on and off according to the switching signal, and the scanning unit, the first driving signal generator and the second driving signal generator are integrated in a single chip. The scanning display of claim 3, wherein the driving module further comprises a storage unit electrically connected to the control module, and the first and second driving signal generators for receiving and temporarily storing data from the control module This image stream for the module. A driving device of a scanning type display, the scanning type display comprises a light-emitting diode array with a common anode structure and a display module, the driving device of the scanning type display comprises: a control module for generating an image stream, and a synchronization control signal; and a driving module, which receives an input voltage and is electrically connected to the LED array and the display module, and is electrically connected to the control module to receive the synchronization control signal and the image stream, The driving module sequentially outputs the input voltage to the scan lines of each row of the LED array according to the synchronization control signal and the image stream, so that the LED array emits light in a row scanning manner, The driving module also generates an image update signal according to the synchronization control signal and the input voltage output to the scan line of the last row, and the image update signal is related to the image update of the display module. The driving device of claim 6, wherein the driving module comprises: a scanning unit that receives a plurality of switching signals and the input voltage and is electrically connected to each scanning line of the backlight module, and is subjected to the plurality of switching signals signal control a first driving signal generator, electrically connected to the scanning unit and the control module, and having a phase lock for generating a clock signal a loop circuit, the first driving signal generator receives the synchronization control signal and the image stream, and generates the plurality of switching signals according to the synchronization control signal, the image stream and the clock signal, and also according to The synchronization control signal and the switching signal corresponding to the last row of scan lines generate the image update signal, and a second drive signal generator is electrically connected to the first drive signal generator to receive the image update signal, and according to The image update signal and the image stream generate an output signal. A driving method of a scanning display is performed by a driving module. The scanning display includes a light-emitting diode array with a common anode structure. The driving method of the scanning display comprises the following steps: (A) receiving and temporarily storing data from An image stream of a control module; (B) receiving a synchronization control signal from the control module; (C) according to the synchronization control signal, the image stream and a line related to the scanning display The clock signal of scan switching outputs an input voltage to the scan lines of each row of the light emitting diode array in sequence, so that the light emitting diode array emits light in a row scanning manner; and (D) according to the synchronization control signal and the input voltage output to the scan line of the last row to generate an image update signal, the image update signal is related to the image update of the scanning display. The method for driving a scanning display according to claim 8, after step (D), further comprising a step (E) generating an output signal to the scanning display according to the image update signal and the image stream, The scanning type display is driven to display and update the image, so that the scanning type display can update the displayed image following the change of the image update signal. A scanning display, comprising: a light-emitting diode direct display module, including a plurality of scanning lines, which are arranged along a row direction with each other, a plurality of data lines, which are vertically arranged on the scanning lines along a column direction with each other, and a plurality of light-emitting diodes. The polar bodies are respectively correspondingly disposed between the matrixes defined by the plurality of scan lines and the plurality of data lines, each light emitting diode has an anode electrically connected to the corresponding scan line, and an electrically connected a cathode corresponding to the data line; a driving device, comprising: a control module, which generates an image stream and a synchronous control signal; a driving module, which is electrically connected to the LED direct display module, and The control module is electrically connected to receive the synchronization control signal and the image stream, and the drive module sequentially outputs an input voltage to the LED direct display according to the synchronization control signal and the image stream The scanning lines of each row of the module make the LED direct display module emit light in a row scanning manner, The driving module also generates an image update signal according to the synchronization control signal and the input voltage output to the scan line of the last row, and generates a plurality of driving signals to the image update signal and the image stream according to the image update signal and the image stream. The plurality of data lines of the LED direct display module. The scanning display of claim 10, wherein the driving module comprises: a scanning unit that receives a plurality of switching signals and the input voltage and is electrically connected to each scanning line of the LED direct display module, and controlled by the plurality of switching signals to sequentially output the input voltage to the scan lines of each row of the LED direct display module; a storage unit electrically connected to the control module to temporarily store the image string stream; and a first driving signal generator, electrically connected to the scanning unit, the storage unit and the control module, and having a phase-locked loop circuit for generating the clock signal, the first driving signal generator from the control The synchronization control signal of the module and the image stream from the storage unit generate the plurality of switching signals according to the synchronization control signal, the image stream and the clock signal, and also according to the synchronization control signal and the switching signal corresponding to the scan line of the last row, generate the image update signal, and generate a plurality of driving signals to the multiple of the LED direct display module according to the image update signal and the image stream data line.

Images