Image display device and control method thereof

Abstract

The present application provides an image display device and a control method thereof. The control method of the image display device comprises: receiving a first image signal transmitted by a host and displaying a picture, a first picture data in the first image signal having a first frequency; determining that the image display device enters a reduced motion blur mode, writing a multiple frequency of a vertical synchronization signal into a storage unit; and notifying the host to read the storage unit, and the host interlacedly outputting a second picture data and a black insertion picture data, the second picture data having a second frequency, wherein the second frequency is higher than the first frequency.

Description

TECHNICAL FIELD

[0001] The present application relates to an image display device and a control method thereof. BACKGROUND

[0002] The existing black frame insertion technology periodically inserts a full black frame between two frames of pictures to make the originally blurred pictures clear. However, this black frame insertion technology requires a high specification scaler to achieve, and the scaler outputs the interlaced normal picture and full black picture at a frequency. Therefore, the cost is also high.

[0003] Another black frame insertion technology relies on switching the backlight on and off to insert black, but this method also requires additional control circuit, resulting in increased cost.

[0004] Moving Picture Response Time (MPRT) is a technique for reducing picture blur, such as temporarily turning off the backlight during screen color conversion, and turning on the backlight after color conversion. With the MPRT technology, the display time of each frame on the screen is reduced, and the screen persistence effect is reduced, so the picture blur and ghosting phenomenon are reduced.

[0005] However, how to achieve the combined function of supporting MPRT and eliminating red residue at low cost and high efficiency without modifying the backlight control mechanism is one of the efforts of the industry SUMMARY

[0006] The present application provides an image display device and a control method thereof to achieve the combined function of supporting MPRT and eliminating red residue at low cost and high efficiency without modifying the backlight control mechanism.

[0007] An embodiment of the present application provides a control method of an image display device, comprising: receiving a first image signal transmitted by a host and displaying a picture, first picture data in the first image signal having a first frequency;

[0008] determining that the image display device enters a dynamic blur reduction mode, writing a frequency multiplication frequency of a vertical synchronization signal into a storage unit; and notifying the host to read the storage unit, and the host to output second picture data and black frame data alternately, the second picture data having a second frequency, wherein the second frequency is higher than the first frequency.

[0009] Preferably, in the method, when it is determined that the image display device does not enter the reduced dynamic blur mode, the frequency of the vertical synchronization signal is written into the storage unit; and the host is informed to output the first picture data according to the frequency of the vertical synchronization signal.

[0010] Preferably, in the method, when it is determined that the LED reduced dynamic blur backlight control mode has been turned on, the backlight module is controlled in a pulse width modulation mode; and when the LED reduced dynamic blur backlight control mode is turned off, the pulse width modulation mode is turned off and the backlight module continuously outputs backlight.

[0011] Preferably, in the method, the host determines whether an entering reduced dynamic blur mode instruction or an exiting reduced dynamic blur mode instruction is received; when the host receives the entering reduced dynamic blur mode instruction, the host sets the vertical synchronization signal at a frequency of rising or the highest frequency; and the host interleaves the output of the second picture data and the black frame at the frequency of rising or the highest frequency.

[0012] Preferably, in the method, when the exiting reduced dynamic blur mode instruction is received by the host, the host returns the vertical synchronization signal; and the host outputs the first picture data.

[0013] Preferably, in the method, when the backlight module is controlled in the pulse width modulation mode, the current picture state is detected, the backlight module is controlled in the pulse width modulation mode synchronously with the normal picture, or the backlight module is controlled in the pulse width modulation mode synchronously with the vertical synchronization signal, or the current picture state is detected, and the backlight module is controlled in an independent pulse width modulation mode synchronously with the normal picture.

[0014] Another embodiment of the present application provides an image display device, which includes a scaling control chip, a backlight module, and a storage unit. The backlight module is coupled to the scaling control chip. The storage unit is coupled to the scaling control chip. The image display device receives a first image signal transmitted by a host and displays a picture, the first picture data in the first image signal having a first frequency; when the scaling control chip determines that the image display device enters a reduced dynamic blur mode, the scaling control chip writes a frequency of a vertical synchronization signal into the storage unit; and the scaling control chip informs the host to read the storage unit, and the image display device receives second picture data interleaved with black frame data output by the host, the second picture data having a second frequency, wherein the second frequency is higher than the first frequency.

[0015] Preferably, when the scaling control chip determines that the image display device does not enter the reduced motion blur mode, the scaling control chip writes the frequency of the vertical synchronization signal into the storage unit; and the scaling control chip informs the host to output the first picture data according to the frequency of the vertical synchronization signal.

[0016] Preferably, when it is determined that the LED reduced motion blur backlight control mode has been turned on, the scaling control chip controls the backlight module in a pulse width modulation mode; and when the LED reduced motion blur backlight control mode is turned off, the pulse width modulation mode is turned off and the backlight module continuously outputs backlight.

[0017] Preferably, when the scaling control chip controls the backlight module in the pulse width modulation mode: the scaling control chip detects the current picture state, synchronizes with the normal picture to control the backlight module in the pulse width modulation mode; the scaling control chip synchronizes with the vertical synchronization signal to control the backlight module in the pulse width modulation mode; or the scaling control chip detects the current picture state, independently controls the backlight module in the pulse width modulation mode according to the normal picture.

[0018] Another embodiment of the present application provides a control method of an image display device, comprising: a scaling control chip determining that the image display device enters a reduced motion blur mode; the scaling control chip informing a host to transmit a first image signal, the first picture data of the first image signal having a first frequency; and the scaling control chip interleaving output of second picture data and black frame data, the second picture data having a second frequency, wherein the second frequency is lower than the first frequency.

[0019] Preferably, when the scaling control chip determines that the image display device enters the reduced motion blur mode, the scaling control chip sets an interleaved output black frame flag to be turned on.

[0020] Preferably, the scaling control chip confirms whether the interleaved output black frame flag is turned on; when the interleaved output black frame flag is turned on, the scaling control chip interleaves output of the second picture data and the black frame data; and when the reduced motion blur mode is exited, the scaling control chip sets the interleaved output black frame flag to be turned off; and when the interleaved output black frame flag is turned off, the scaling control chip does not perform interleaved output of black frame; and the scaling control chip sets the interleaved output black frame flag to be turned on.

[0021] Compared with the prior art, when the user switches the MPRT function, the vertical synchronization signal is multiplied or upgraded, and is written into the EDID, and the host is notified to output normal pictures and black insertion pictures alternately. Therefore, in an embodiment of the present application, the LCD black insertion mode can be used to effectively and directly improve the motion blur and eliminate the phenomenon of red residual of phosphor without modifying the backlight mechanism. Alternatively, when the MPRT function is switched, the scaling control chip is used to output the alternating black insertion pictures, so that the LCD black insertion mode can be used to improve the motion blur and eliminate the phenomenon of red residual of phosphor without modifying the backlight mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A function block diagram of an image display device according to an embodiment of the present application is shown.

[0023] Figure 2 A function block diagram of an image display device according to an embodiment of the present application is shown.

[0024] Figure 3 A control method of an image display device according to an embodiment of the present application is shown.

[0025] Figure 4A With Figure 4B A flowchart of a control method of an image display device according to another embodiment of the present application is shown.

[0026] Figure 5 A signal waveform diagram according to an embodiment of the present application is shown.

[0027] Figure 6A With Figure 6B A flowchart of a control method of an image display device according to another embodiment of the present application is shown.

[0028] Figure 7 A control method of an image display device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] In order to further understand the purpose, structure, features and functions of the present application, the embodiments are described in detail as follows.

[0030] The technical terms in the specification refer to the conventional terms in the technical field, and if the specification explains or defines some terms, the explanation of the terms is based on the explanation or definition in the specification. Each embodiment of the present disclosure has one or more technical features. Those with ordinary knowledge in the art can selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments, under the premise of possibility.

[0031] Figure 1FIG. 1 shows a function block diagram of an image display device according to an embodiment of the present application. As shown in FIG. 1, an image display device 100 according to an embodiment of the present application includes a scaler 110 and a storage unit 120 coupled to the scaler 110, which stores parameters such as extended display identification data (EDID), including but not limited to vertical synchronization signal frequency, display resolution, manufacturer name and serial number, and the like. Figure 1

[0032] A host 150 is coupled to the image display device 100, and the host 150 includes a display card 155. The host 150 can transmit image data VD to the image display device 100.

[0033] Figure 2 FIG. 2 shows a function block diagram of an image display device according to an embodiment of the present application. As shown in FIG. 2, an image display device 100 according to an embodiment of the present application further includes a display panel 210, a backlight control unit 220, a backlight module 230, a switch SW1, and a plurality of resistors RC1, RS1 and RS2. Figure 2

[0034] The display panel 210 and the backlight control unit 220 are coupled to the scaler 110. The display panel 210 is used to display images. The backlight control unit 220 is further coupled to the backlight module 230 to control the backlight module 230. The scaler 110 can send a PWM (Pulse Width Modulation) signal to the backlight control unit 220, so that the backlight control unit 220 can perform backlight PWM control on the backlight module 230.

[0035] The backlight module 230 includes a plurality of series-connected light emitting diodes (LEDs).

[0036] The switch SW1 and the plurality of resistors RC1, RS1 and RS2 are coupled to the backlight control unit 220. The switch SW1 has three terminals coupled to the backlight module 230 and the backlight control unit 220. The resistor RC1 is coupled between the switch SW1 and the backlight control unit 220. The resistor RS1 is coupled between the backlight control unit 220 and a ground terminal. The resistor RS2 is coupled between the backlight control unit 220 and the ground terminal.

[0037] Figure 3 ​​A flowchart of a control method of an image display device according to another embodiment of the present application is shown in FIG. 4. The control method includes the following steps. In step 402, the scaling control chip 110 determines whether the frequency of the vertical synchronization signal Vsync of the received image data VD is greater than a first reference value and whether the maximum vertical synchronization signal Vmax supported by the image display device 100 is greater than a second reference value. For example, but not limited to, the first reference value and the second reference value are 120 Hz and 240 Hz, respectively. If the determination result of step 402 is yes, the flow proceeds to step 404. If the determination result of step 402 is no, the flow ends. Step 402 can be regarded as a detail of step 310. That is, when the scaling control chip 110 determines that the frequency of the vertical synchronization signal Vsync of the received image data VD is the first reference value, it is equivalent to that the image display device 100 receives the first image signal transmitted by the host 150 and displays a picture, wherein the first picture data in the first image signal has the first frequency.

[0038] Figure 4A With Figure 4B A flowchart of a control method of an image display device according to another embodiment of the present application is shown in FIG. 4. The control method includes the following steps. In step 402, the scaling control chip 110 determines whether the frequency of the vertical synchronization signal Vsync of the received image data VD is greater than a first reference value and whether the maximum vertical synchronization signal Vmax supported by the image display device 100 is greater than a second reference value. For example, but not limited to, the first reference value and the second reference value are 120 Hz and 240 Hz, respectively. If the determination result of step 402 is yes, the flow proceeds to step 404. If the determination result of step 402 is no, the flow ends. Step 402 can be regarded as a detail of step 310. That is, when the scaling control chip 110 determines that the frequency of the vertical synchronization signal Vsync of the received image data VD is the first reference value, it is equivalent to that the image display device 100 receives the first image signal transmitted by the host 150 and displays a picture, wherein the first picture data in the first image signal has the first frequency. Figure 4A With Figure 4B are respectively performed by the scaling control chip 110 and the host 150. Figure 4A With Figure 4B is Figure 3 A detailed flowchart of step 330 is shown in FIG. 5. The scaling control chip 110 and the host 150 enter the flow of waiting for processing input signal content subroutine every image frame period (Vsync) time, and confirm the working range of motion blur reduction (MBR).

[0039] In step 402, the scaling control chip 110 determines whether the frequency of the vertical synchronization signal Vsync of the received image data VD is greater than a first reference value and whether the maximum vertical synchronization signal Vmax supported by the image display device 100 is greater than a second reference value. For example, but not limited to, the first reference value and the second reference value are 120 Hz and 240 Hz, respectively. If the determination result of step 402 is yes, the flow proceeds to step 404. If the determination result of step 402 is no, the flow ends. Step 402 can be regarded as a detail of step 310. That is, when the scaling control chip 110 determines that the frequency of the vertical synchronization signal Vsync of the received image data VD is the first reference value, it is equivalent to that the image display device 100 receives the first image signal transmitted by the host 150 and displays a picture, wherein the first picture data in the first image signal has the first frequency.

[0040] In step 404, the scaling control chip 110 determines whether the backlight module 230 is in the motion blur reduction (MBR) mode. If the determination result of step 404 is yes, the flow proceeds to step 406. If the determination result of step 404 is no, the flow proceeds to step 416.

[0041] In step 406, the scaling control chip 110 writes the double frequency of the vertical synchronization signal Vsync into the EDID. Steps 404 and 406 can be regarded as detailed examples of step 320.

[0042] In step 408, the scaling control chip 110 informs the host 150 to read the parameters in the EDID again, and after reading the EDID again, the host 150 interlaces the normal picture and the black picture with the double frequency of the vertical synchronization signal Vsync. In an embodiment, the black picture can be a black image, a gray image or an image with the luminance proportionally reduced. Step 408 can be regarded as a detailed example of step 330. That is, after reading the EDID in the storage unit 120 again, the host 150 interlaces the normal picture and the black picture with the double frequency of the vertical synchronization signal Vsync, which is equivalent to that the image display device 100 informs the host 150 to read the storage unit 120, and the host 150 interlaces the second picture data and the black picture data, the second picture data having a second frequency, wherein the second frequency is higher than the first frequency.

[0043] In step 410, the scaling control chip 110 determines whether the LED MBR backlight control mode has been enabled. If the determination result of step 410 is yes, the flow proceeds to step 412. If the determination result of step 410 is no, the flow proceeds to step 413.

[0044] In step 412, the scaling control chip 110 controls the backlight module 230 in the PWM mode. In an embodiment, there are multiple ways to control the backlight module 230 in the PWM mode, three of which are listed here, but it is understood that the present application is not limited thereto. (1) The scaling control chip 110 detects the current picture state and controls the backlight module 230 in the PWM mode synchronously with the normal picture; or (2) the scaling control chip 110 controls the backlight module 230 in the PWM mode synchronously with the vertical synchronization signal Vsync; or (3) the scaling control chip 110 detects the current picture state and controls the backlight module 230 in the PWM mode independently synchronously with the normal picture.

[0045] In step 413, if the LED MBR backlight control mode is disabled (i.e., the LED MBR backlight control mode is disabled), the PWM control mode is turned off and the backlight module 230 is changed to continuously output the backlight.

[0046] In step 414, the scaling control chip 110 determines whether the vertical synchronization signal Vsync output by the host 150 is equal to the second reference value. If the determination of step 414 is yes, the flow returns to step 402; if the determination of step 414 is no, the flow returns to step 404.

[0047] In step 416, when not in MBR mode, the scaling control chip 110 writes the frequency (120Hz) of the vertical synchronization signal Vsync into EDID.

[0048] In step 418, the scaling control chip 110 instructs the host 150 to output a normal image according to the current frequency of the vertical synchronization signal Vsync.

[0049] The control method of host 150 will now be explained.

[0050] In step 452, the host 150 determines whether the frequency of the vertical synchronization signal Vsync of the image data VD is greater than a first reference value and whether the maximum vertical synchronization signal Vmax supported by the image display device 100 is greater than a second reference value. If the determination result of step 452 is yes, the process continues to step 454. If the determination result of step 452 is no, the process ends.

[0051] In step 454, the host 150 determines whether it has received an entry command or exit command for MBR mode from the scaling control chip 110.

[0052] When the host 150 receives the command to enter MBR mode from the scaling control chip 110, in step 456, the host 150 sets the vertical synchronization signal Vsync at an upscaled or maximum frequency. In step 458, the host 150 interleaves normal and black-and-white frames to the image display device 100 at an upscaled or maximum frequency.

[0053] When the host 150 receives the command to exit MBR mode from the scaling control chip 110, in step 460, the host 150 replies with the vertical synchronization signal Vsync, and in step 462, the host 150 outputs a normal image to the image display device 100.

[0054] Figure 5 This diagram shows a signal waveform according to an embodiment of the present invention. Figure 5 As shown, in normal mode, assuming, but not limited to, that the vertical synchronization signal Vsync is 120Hz, the image data output by the host 150 is a normal screen. In normal mode, the normal screen has a frequency (i.e., the first screen data in the first image signal of step 310 has a first frequency), for example, but not limited to, 120Hz.

[0055] In MBR mode, assuming, but not limited to, that the vertical sync signal Vsync is 240Hz, the host 150 interleaves normal frames and black-and-white frames. The frequency of the normal frame in MBR mode is higher than the frequency of the normal frame in normal mode (i.e., the second frame data in step 330 has a second frequency, which is higher than the first frequency). The second frequency is, for example, but not limited to, 240Hz.

[0056] like Figure 5 As shown, the LED backlight MBR enable signal can be synchronized with the normal screen or with the vertical signal Vsync. Furthermore, when in LED backlight MBR mode, the LED backlight MBR disable signal is pulled high.

[0057] In one embodiment of this case, as Figure 5 As shown, even a typical 240Hz display without hardware MBR enabling can still achieve the MBR effect after applying the above-described method of this embodiment. This is also one of the advantages and benefits of this embodiment.

[0058] In one embodiment of this invention, when the user switches the MPRT function, the vertical synchronization signal is multiplied or up-clocked and written to EDID, and the host is notified to interleave the output of normal and black-stitched images. Therefore, in one embodiment of this invention, without modifying the backlight mechanism, the LCD black-stitching method can be achieved to effectively and directly improve motion blur and eliminate phosphor pink residue.

[0059] During each image frame cycle (Vsync) time, the scaling control chip 110 and the host 150 enter a process of waiting to process the input signal content subroutine to confirm the working range of reducing motion blur (MBR).

[0060] Figure 6A and Figure 6B This diagram shows a flowchart of an image display device control method according to another embodiment of the present invention. In step 610, the scaling control chip 110 determines whether the frequency of the vertical synchronization signal Vsync of the received image data VD is greater than a first reference value and whether the maximum vertical synchronization signal Vmax supported by the image display device 100 is greater than a second reference value. For example, but not limited to, the first reference value and the second reference value are 120Hz and 240Hz, respectively. If step 610 is yes, the process continues to step 615; if step 610 is no, the process ends.

[0061] In step 615, the scaling control chip 110 determines whether the backlight module 230 is in a motion blur reduction (MBR) mode. If the determination in step 615 is YES, the flow proceeds to step 620. If the determination in step 615 is NO, the flow proceeds to step 655.

[0062] In step 620, if the backlight module 230 is in the MBR mode, the scaling control chip 110 notifies the host 150 to output a first image signal, wherein a first picture data in the first image signal has a first frequency (e.g., but not limited to, 240 Hz), and the scaling control chip 110 sets an interlaced output black frame flag to be turned on (e.g., but not limited to, logic 1, representing that the interlaced output black frame function is turned on).

[0063] In step 625, the scaling control chip 110 determines whether the interlaced output black frame flag is turned on. If the determination in step 625 is YES, the flow proceeds to step 630. If the determination in step 625 is NO, the flow proceeds to step 635.

[0064] In step 630, when the interlaced output black frame flag is turned on, the scaling control chip 110 performs interlaced output black frame, e.g., the scaling control chip 110 interlacedly outputs a second picture data and a black frame data, wherein the second picture data has a second frequency, the second frequency is lower than the first frequency; and when the backlight module 230 is out of the MBR mode, the scaling control chip 110 sets the interlaced output black frame flag to be turned off (e.g., but not limited to, logic 0, representing that the interlaced output black frame function is turned off).

[0065] In an embodiment, in step 630, the scaling control chip 110 inserts black frame to the first image signal outputted by the host 150, e.g., but not limited to, if the vertical synchronization signal of the first image signal outputted by the host 150 is N (N is a positive integer) Hz, in a possible example, the scaling control chip 110 interlacedly outputs a second picture data (having (N / 2) Hz) and a black frame data (having (N / 2) Hz), thereby achieving 1 / 2 frequency division; or in another possible example, the scaling control chip 110 interlacedly outputs a second picture data (having (N / 3) Hz) and a black frame data (having (N*2 / 3) Hz), thereby achieving 1 / 3 frequency division.

[0066] In step 635, when the interlaced output black frame flag is currently turned off, the scaling control chip 110 does not perform interlaced output black frame, e.g., the scaling control chip 110 continues to output the first image signal outputted by the host 150 (i.e., without inserting black frame); and the scaling control chip 110 sets the interlaced output black frame flag to be turned on.

[0067] At step 640, it is determined whether the LED MBR backlight control mode has been turned on. If the determination at step 640 is YES, then the flow proceeds to step 645. If the determination at step 640 is NO, then the flow proceeds to step 650.

[0068] At step 645, the scaling control chip 110 detects the second picture data and the black frame insertion picture data currently outputted to output the corresponding set backlight PWM for performing the brightness compensation.

[0069] At step 650, the scaling control chip 110 determines whether the frequency of the video signal outputted by the host 150 is still the first frequency (e.g., but not limited to 240 Hz). If the determination at step 650 is YES, then the flow returns to step 610. If the determination at step 650 is NO, then the flow returns to step 615 (i.e., when it is checked that the frequency of the video signal outputted by the host 150 is wrong, the scaling control chip 110 notifies the host 150 to re-output the video signal with the first frequency).

[0070] At step 655, if not in the MBR mode, the scaling control chip 110 compares whether the frequency of the vertical synchronization signal of the currently received image is the same as the last memorized vertical synchronization signal frequency. If the determination at step 655 is YES (the frequencies are different), then at step 660, the scaling control chip 110 outputs the normal picture (with the last memorized vertical synchronization signal frequency). If the determination at step 655 is NO (the frequencies are the same), then the flow returns to step 610.

[0071] Figure 7 A control method of an image display device according to an embodiment of the present application includes: a scaling control chip determining that the image display device enters a reduced motion blur mode (710); the scaling control chip notifying a host to transmit a first video signal, the first picture data of the first video signal having a first frequency (720); and the scaling control chip interleaving output of second picture data and black frame insertion picture data, the second picture data having a second frequency, wherein the second frequency is lower than the first frequency (730). The details of steps 710-730 can refer to Figure 6A and Figure 6B , and thus the details are omitted herein.

[0072] In another embodiment of the present application, when the MPRT function is switched, interleaved black frame insertion picture outputted by the scaling control chip can achieve the LCD black frame insertion mode to improve the dynamic blur and eliminate the phenomenon of red residual of the phosphor without modifying the backlight mechanism.

[0073] Therefore, the image display device and the control method of the embodiments can be applied to electronic products in the fields related to personal computers, notebook computers, tablet devices, televisions, projectors, and the like.

[0074] The present application has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present application. It must be pointed out that the disclosed embodiments do not limit the scope of the present application. On the contrary, modifications and improvements made without departing from the spirit and scope of the present application are within the scope of the patent protection of the present application.

Claims

1. A control method of an image display apparatus, characterized by, comprising: receiving a first image signal transmitted by a host and displaying a picture, a first picture data in the first image signal having a first frequency; determining that the image display device enters a reduced motion blur mode, writing a frequency multiplied by a vertical synchronization signal into a storage unit; and informing the host to read the storage unit, and the host to output second picture data and a black insertion picture data alternately, the second picture data having a second frequency, wherein the second frequency is higher than the first frequency.

2. The control method of the image display apparatus according to claim 1, wherein when determining that the image display device does not enter the reduced motion blur mode, writing the frequency of the vertical synchronization signal into the storage unit; and informing the host to output the first picture data according to the frequency of the vertical synchronization signal.

3. The control method of the image display apparatus according to claim 1, wherein further comprising: controlling a backlight module in a pulse width modulation mode when a LED reduced motion blur backlight control mode is determined to be turned on; and when the LED reduced motion blur backlight control mode is turned off, turning off the pulse width modulation mode and making the backlight module output backlight continuously.

4. The control method of the image display device of claim 1, wherein: the host determines whether an entering reduced motion blur mode instruction or an exiting reduced motion blur mode instruction is received; when the host receives the entering reduced motion blur mode instruction, the host sets the vertical synchronization signal at a frequency up or a highest frequency; and the host outputs the second picture data and the black insertion picture data alternately at the frequency up or the highest frequency.

5. The control method of the image display device of claim 4, wherein: when the exiting reduced motion blur mode instruction is received by the host, the host returns the vertical synchronization signal; and the host outputs the first picture data.

6. The control method of the image display device of claim 3, wherein: when the backlight module is controlled in the pulse width modulation mode: detecting a current picture state, and controlling the backlight module in the pulse width modulation mode synchronously with a normal picture; or controlling the backlight module in the pulse width modulation mode synchronously with the vertical synchronization signal; or detecting the current picture state, and controlling the backlight module in an independent pulse width modulation mode synchronously with the normal picture. comprising: a scaling control chip; a backlight module coupled to the scaling control chip; and 7. An image display device, characterized by comprising: a storage unit coupled to the scaling control chip, wherein the image display device receives a first image signal transmitted by a host and displays a picture, a first picture data in the first image signal having a first frequency; when the scaling control chip determines that the image display device enters a reduced motion blur mode, the scaling control chip writes a frequency multiplied by a vertical synchronization signal into a storage unit; and the scaling control chip informs the host to read the storage unit, and the image display device receives second picture data and a black insertion picture data outputted by the host alternately, the second picture data having a second frequency, wherein the second frequency is higher than the first frequency. when the scaling control chip determines that the image display device does not enter the reduced motion blur mode, the scaling control chip writes the frequency of the vertical synchronization signal into the storage unit; and the scaling control chip informs the host to output the first picture data according to the frequency of the vertical synchronization signal. ​ ​ 8. The image display apparatus of Claim 7, wherein ​ ​ The scaling control chip informs the host to output the first picture data according to the frequency of the vertical synchronization signal.

9. The image display device of claim 7, wherein When it is determined that the LED dynamic blur reduction backlight control mode is turned on, the scaling control chip controls the backlight module in a pulse width modulation mode; and When the LED dynamic blur reduction backlight control mode is turned off, the pulse width modulation mode is turned off and the backlight module continuously outputs backlight.

10. The image display device of claim 9, wherein When the scaling control chip controls the backlight module in the pulse width modulation mode: The scaling control chip detects the current picture state and controls the backlight module in the pulse width modulation mode synchronously with normal pictures; or The scaling control chip controls the backlight module in the pulse width modulation mode synchronously with the vertical synchronization signal; or The scaling control chip detects the current picture state and controls the backlight module in the pulse width modulation mode independently with normal pictures.

11. A control method of an image display apparatus, characterized by, including: The scaling control chip determines that the image display device enters a dynamic blur reduction mode; The scaling control chip informs the host to transmit a first image signal, the first picture data of the first image signal having a first frequency; and The scaling control chip interleaves output of second picture data and black frame data, the second picture data having a second frequency, wherein the second frequency is lower than the first frequency.

12. The control method of the image display apparatus according to claim 11, wherein When the scaling control chip determines that the image display device enters the dynamic blur reduction mode, the scaling control chip sets an interleaved output black frame flag to on.

13. The control method of the image display device of claim 12, wherein The scaling control chip confirms whether the interleaved output black frame flag is on; When the interleaved output black frame flag is on, the scaling control chip interleaves output of the second picture data and the black frame data; and when the dynamic blur reduction mode is exited, the scaling control chip sets the interleaved output black frame flag to off; and When the interleaved output black frame flag is off, the scaling control chip does not perform interleaved output of black frame; and the scaling control chip sets the interleaved output black frame flag to on. and the scaling control chip sets the interleaved output black frame flag to on.

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