CN116229858A - Image display device and control method thereof - Google Patents

Image display device and control method thereof Download PDF

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Publication number
CN116229858A
CN116229858A CN202111455962.2A CN202111455962A CN116229858A CN 116229858 A CN116229858 A CN 116229858A CN 202111455962 A CN202111455962 A CN 202111455962A CN 116229858 A CN116229858 A CN 116229858A
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frequency
control chip
image display
host
display device
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CN202111455962.2A
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陈旻志
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Qisda Suzhou Co Ltd
Qisda Corp
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Qisda Suzhou Co Ltd
Qisda Corp
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

The invention provides an image display device and a control method thereof. The control method of the image display device comprises the following steps: receiving a first image signal transmitted by a host and displaying a picture, wherein first picture data in the first image signal has a first frequency; determining that the image display device enters a dynamic blur reduction mode, and writing the frequency multiplication frequency of the vertical synchronizing signal into a storage unit; and informing the host to read the storage unit, and the host outputs second picture data and black inserted picture data in a staggered way, wherein the second picture data has a second frequency, and the second frequency is higher than the first frequency.

Description

Image display device and control method thereof
Technical Field
The invention relates to an image display device and a control method thereof.
Background
The conventional black insertion technique (Black Frame Insertion Technology) periodically inserts full black pictures into two frames of pictures, so that the picture with original smear becomes clear. However, this black insertion technique requires a high-scale scaling control chip (Scaler) to achieve the goal of doubling the frequency of the interlaced normal and full black images. Therefore, the cost is also high.
Another black inserting technology relies on switching the backlight on and off to perform black inserting, but this approach also adds a corresponding control circuit, resulting in increased cost.
The dynamic picture response time (Moving Picture Response Time, MPRT) is a technique for reducing the blurring of pictures, for example, turning off the backlight temporarily during the color conversion of the screen, and turning on the backlight after the color conversion. After the MPRT technology is adopted, the display time of each frame of picture on the screen is shortened, so that the temporary effect of the screen picture is reduced, and the phenomena of picture smear, residual shadow and the like are reduced.
However, how to achieve the combined functions of supporting MPRT and eliminating red residues at low cost and high efficiency without modifying the backlight control mechanism is one of the efforts in the industry
Disclosure of Invention
The invention provides an image display device and a control method thereof, which can achieve the composite functions of supporting MPRT and eliminating red residues with low cost and high efficiency without modifying a backlight control mechanism.
An embodiment of the invention provides a control method of an image display device, including: receiving a first image signal transmitted by a host and displaying a picture, wherein first picture data in the first image signal has a first frequency;
determining that the image display device enters a dynamic blur reduction mode, and writing the frequency multiplication frequency of the vertical synchronizing signal into the storage unit; and informing the host to read the storage unit, and the host to alternately output second picture data and black inserted picture data, wherein the second picture data has a second frequency, and the second frequency is higher than the first frequency.
Preferably, in the above method, when it is determined that the image display device does not enter the motion blur reduction mode, writing the frequency of the vertical synchronization signal into the storage unit; and notifying the host to output the first frame data according to the frequency of the vertical synchronization signal.
Preferably, in the above method, the method further includes: when judging that the LED reduces the dynamic fuzzy backlight control mode to be started, controlling the backlight module by using a pulse width modulation mode; and when the LED dimming dynamic fuzzy backlight control mode is turned off, turning off the pulse width modulation mode, and enabling the backlight module to continuously output backlight.
Preferably, in the above method, the host determines whether an instruction to enter the reduced motion blur mode or an instruction to exit the reduced motion blur mode is received; when the host receives the command of entering the dynamic blur reducing mode, the host sets the vertical synchronizing signal by using the ascending frequency or the highest frequency; and the host machine staggers and outputs the second picture data and the black frame by the up-conversion or the highest frequency.
Preferably, in the above method, when the host receives the command to exit the motion blur reduction mode, the host replies the vertical synchronization signal; and the host outputs the first frame data.
Preferably, in the above method, when the backlight module is controlled in the pwm mode: detecting the state of the current picture, and controlling the backlight module in a pulse width modulation mode in synchronization with the normal picture; or the backlight module is controlled in a pulse width modulation mode in synchronization with the vertical synchronous signal; or detecting the current picture state, and controlling the backlight module in an independent pulse width modulation mode in synchronization with the normal picture.
Another embodiment of the present invention provides an image display device, which includes a zoom control chip, a backlight module and a storage unit. The backlight module is coupled to the zoom control chip. The storage unit is coupled to the scaling control chip. The image display device receives a first image signal transmitted by the host and displays a picture, wherein first picture data in the first image signal has a first frequency; when the scaling control chip determines that the image display device enters a dynamic blur reduction mode, the scaling control chip writes the frequency multiplication frequency of the vertical synchronizing signal into the storage unit; and the zoom control chip informs the host to read the storage unit, and the image display device receives the second picture data and the black frame inserting data which are output by the host in a staggered way, wherein the second picture data has a second frequency, and the second frequency is higher than the first frequency.
Preferably, when the zoom control chip determines that the image display device does not enter the motion blur reduction mode, the zoom control chip writes the frequency of the vertical synchronization signal into the storage unit; and the zoom control chip informs the host to output the first frame data according to the frequency of the vertical synchronization signal.
Preferably, when the LED dimming dynamic blur backlight control mode is judged to be started, the zoom control chip controls the backlight module in a pulse width modulation mode; and when the LED dimming dynamic fuzzy backlight control mode is turned off, turning off the pulse width modulation mode, and enabling the backlight module to continuously output backlight.
Preferably, when the zoom control chip controls the backlight module in the pulse width modulation mode: the zoom control chip detects the current picture state and synchronizes with the normal picture to control the backlight module in a pulse width modulation mode; the zoom control chip is synchronous with the vertical synchronous signal and controls the backlight module in a pulse width modulation mode; or the zoom control chip detects the current picture state and controls the backlight module in a pulse width modulation mode independently in synchronization with the normal picture.
In another embodiment of the present invention, a control method of an image display apparatus includes: the zoom control chip judges that the image display device enters a dynamic blur reduction mode; the zoom control chip informs the host computer to transmit a first image signal, wherein the first picture data of the first image signal has a first frequency; and the zoom control chip outputs a second picture data and black inserted picture data in a staggered manner, wherein the second picture data has a second frequency, and the second frequency is lower than the first frequency.
Preferably, when the zoom control chip determines that the image display device enters the motion blur reduction mode, the zoom control chip sets the interlaced output black frame insertion flag to be on.
Preferably, the zoom control chip confirms whether the interlaced output black frame flag is on; when the interlaced output black frame inserting flag is on, the zoom control chip interlaced outputs the second frame data and the black frame inserting data; and when the motion blur reducing mode is left, the zoom control chip sets the interleaved output black frame inserting flag to be off; and when the interleaved output black frame inserting flag is off, the scaling control chip does not perform interleaved output black frame inserting; and the zoom control chip sets the interleaved output black frame insertion flag to be on.
Compared with the prior art, when the user switches the MPRT function, the vertical synchronous signal is multiplied or increased in frequency and written into the EDID, and the host is informed to output the normal picture and the black frame in a staggered way. Therefore, in an embodiment of the present invention, the LCD black insertion method can be achieved without modifying the backlight mechanism to effectively and directly improve the Motion Blur (Motion blue) and eliminate the fluorescent pink residue. Or when the MPRT function is switched, the zoom control chip is utilized to output the staggered black frame, so that the LCD black frame inserting mode can be achieved without modifying a backlight mechanism to improve the motion blur and eliminate the phenomenon of fluorescent pink residue.
Drawings
Fig. 1 shows a functional block diagram of an image display device according to an embodiment of the present disclosure.
Fig. 2 shows a functional block diagram of an image display device according to an embodiment of the present disclosure.
Fig. 3 shows a control method of an image display device according to an embodiment of the present disclosure.
Fig. 4A and 4B are flowcharts illustrating a control method of an image display device according to another embodiment of the present disclosure.
Fig. 5 shows a signal waveform diagram according to an embodiment of the present invention.
Fig. 6A and 6B are flowcharts illustrating a control method of an image display device according to another embodiment of the present disclosure.
Fig. 7 shows a control method of an image display device according to an embodiment of the present disclosure.
Detailed Description
For a further understanding of the objects, construction, features and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
Technical terms of the present specification refer to conventional terms in the art, and as the present specification, a part of terms are described or defined, and the explanation of the part of terms is to be controlled by the description or definition of the present specification. Various embodiments of the present disclosure each have one or more technical features. Those of ordinary skill in the art may, where applicable, selectively implement some or all of the features of any of the embodiments or combine some or all of the features of the embodiments.
Fig. 1 shows a functional block diagram of an image display device according to an embodiment of the present disclosure. As shown in fig. 1, an image display apparatus 100 according to an embodiment of the present disclosure includes: a scaling control chip (Scaler) 110 and a storage unit 120 coupled to the scaling control chip 110 store parameters such as extended display capability identification (Extended display identification data, EDID for short), and the EDID includes but is not limited to: the frequency of the vertical synchronous signal, the resolution of the display, the manufacturer name and serial number, etc.
The host 150 is coupled to the image display device 100, and the host 150 includes a display card 155. The host 150 can transmit the image data VD to the image display device 100.
Fig. 2 shows a functional block diagram of an image display device according to an embodiment of the invention. As shown in fig. 2, the image display device 100 according to an embodiment of the present invention further includes: the display panel 210, the backlight control unit 220, the backlight module 230, the switch SW1 and the resistors RC1, RS1 and RS2.
The display panel 210 and the backlight control unit 220 are coupled to the scaling control chip 110. The display panel 210 is used for displaying images. The backlight control unit 220 is further coupled to the backlight module 230 for controlling the backlight module 230. The scaling control chip 110 may send a PWM (pulse width modulation ) signal to the backlight control unit 220, so that the backlight control unit 220 performs backlight PWM control on the backlight module 230.
The backlight module 230 includes a plurality of Light Emitting Diodes (LEDs) connected in series.
The switch SW1 and the resistors RC1, RS1 and RS2 are coupled to the backlight control unit 220. The three ends of the switch SW1 are 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 the ground terminal. The resistor RS2 is coupled between the backlight control unit 220 and the ground terminal.
Fig. 3 shows a control method of an image display device according to an embodiment of the present disclosure, including: in step 310, a first image signal transmitted by a host is received and a frame is displayed, wherein first frame data in the first image signal has a first frequency; in step 320, it is determined that the image display device enters a motion blur reduction (Motion Blur Reduction, MBR) mode, and the frequency multiplication frequency of the vertical synchronization signal is written into the storage unit; and in step 330, notifying the host to read the storage unit, and the host alternately outputs second frame data and black frame insertion frame data, wherein the second frame data has a second frequency, and the second frequency is higher than the first frequency.
Fig. 4A and 4B are flowcharts illustrating a control method of an image display device according to another embodiment of the present disclosure, wherein fig. 4A and 4B are executed by the scaling control chip 110 and the host 150, respectively. Fig. 4A and 4B are detailed flowcharts of fig. 3. The scaling control chip 110 and the host 150 enter the process of waiting for processing the input signal content subroutine at each image frame period (Vsync) time, and confirm the working range of reducing the motion blur (Motion Blur Reduction, MBR).
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. Wherein, for example and without limitation, the first reference value and the second reference value are 120Hz and 240Hz, respectively. If the determination at step 402 is yes, the flow proceeds to step 404. If the result of the determination in step 402 is negative, the flow ends. Step 402 may be considered the details 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, the image display device 100 receives the first image signal transmitted by the host 150 and displays the frame, wherein the first frame data in the first image signal has the first frequency.
In step 404, the zoom control chip 110 determines whether the backlight module 230 is in a reduced motion blur (Motion Blur Reduction, MBR) mode. If the determination at step 404 is yes, the flow proceeds to step 406. If the determination at step 404 is negative, flow proceeds to step 416.
In step 406, the scaling control chip 110 writes the twice frequency of the vertical synchronization signal Vsync into EDID. Steps 404 and 406 may be considered as detailed examples of step 320.
In step 408, the scaling control chip 110 notifies the host 150 to read the parameters in the EDID again, and after the EDID is read again, the host 150 interleaves and outputs the normal frame and the black frame with the frequency twice that of the vertical synchronization signal Vsync. In one embodiment, the black frame may be a black image, a gray image, or an image with reduced brightness. Step 408 may be considered a detailed example of step 330. That is, after reading the EDID in the storage unit 120 again, the host 150 interleaves and outputs the normal frame and the black frame with the frequency twice that of the vertical synchronization signal Vsync, which is equivalent to informing the host 150 of reading the storage unit 120 by the image display device 100, and the host 150 interleaves and outputs the second frame data and the black frame data, wherein the second frame data has the second frequency, and the second frequency is higher than the first frequency.
In step 410, the scaling control chip 110 determines whether the LED MBR backlight control mode has been turned on. If the determination at step 410 is yes, the flow proceeds to step 412. If the result of the determination in step 410 is negative, the flow proceeds to step 413.
In step 412, the zoom control chip 110 controls the backlight module 230 in a PWM mode. In the present embodiment, there are various ways to control the PWM mode of the backlight module 230, but it should be understood that the present invention is not limited thereto. (1) The zoom control chip 110 detects the current frame status and PWM controls the backlight module 230 in synchronization with the normal frame; alternatively, (2) the scaling control chip 110 PWM-controls the backlight module 230 in synchronization with the vertical synchronization signal Vsync; alternatively, (3) the zoom control chip 110 detects the current frame status and PWM-controls the backlight module 230 independently in synchronization with the normal frame.
In step 413, if the LED MBR backlight control mode is turned off (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 backlight.
In step 414, the scaling control wafer 110 determines whether the vertical synchronization signal Vsync outputted by the host computer 150 is equal to the second reference value. If step 414 is true, flow returns to step 402; if step 414 is false, flow returns to step 404.
In step 416, when the MBR mode is not in, the scaling control wafer 110 writes the frequency (120 Hz) of the vertical synchronization signal Vsync into the EDID.
In step 418, the scaling control chip 110 informs the host 150 to output a normal frame according to the frequency of the vertical synchronization signal Vsync.
The control method of the host 150 will now be described.
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 at step 452 is yes, the flow proceeds to step 454. If the result of the determination in step 452 is negative, the flow ends.
In step 454, the host 150 determines whether an enter MBR mode command or an exit MBR mode command from the scaling control chip 110 is received.
When the host 150 receives the command to enter the MBR mode from the scaling control chip 110, in step 456, the host 150 sets the vertical synchronization signal Vsync with an up-conversion or highest frequency. In step 458, the host 150 outputs the normal frame and the black frame to the image display device 100 in an up-conversion or highest frequency interleaving manner.
When the host 150 receives the MBR mode exit command from the scaling control chip 110, the host 150 returns the vertical synchronization signal Vsync in step 460, and the host 150 outputs a normal frame to the image display device 100 in step 462.
Fig. 5 shows a signal waveform diagram according to an embodiment of the present invention. As shown in fig. 5, in the normal mode, the image data outputted from the host 150 is a normal frame, assuming, but not limited to, that the vertical synchronization signal Vsync is 120Hz. In the normal mode, the normal frame has a frequency (i.e. the first frame data in the first image signal of step 310 has a first frequency), for example, but not limited to, 120Hz.
In the MBR mode, assuming, but not limited to, the vertical synchronization signal Vsync is 240Hz, the normal frame and the black frame are interlaced and output by the host 150. The frequency of the normal frame in the MBR mode is higher than the frequency of the normal frame in the normal mode (i.e. the second frame data of step 330 has a second frequency, wherein the second frequency is higher than the first frequency). The second frequency is, for example, but not limited to, 240Hz.
As shown in fig. 5, the LED backlight MBR enable signal may be synchronized with the normal picture or with the vertical signal Vsync. In addition, when the LED backlight MBR mode is performed, the LED backlight MBR disable signal is pulled high.
In one embodiment, as shown in FIG. 5, even though the general 240Hz display without hardware MBR enabling function is shown, the MBR effect can be obtained after the above-mentioned method of the embodiment is applied. This is also one of the advantages and effects of the present embodiments.
In one embodiment, when the user switches the MPRT function, the vertical synchronization signal is multiplied or raised, written into the EDID, and the host is notified to output the normal frame and the black frame in a staggered manner. Therefore, in an embodiment of the present invention, the LCD black insertion method can be achieved without modifying the backlight mechanism to effectively and directly improve the Motion Blur (Motion blue) and eliminate the fluorescent pink residue.
The scaling control chip 110 and the host 150 enter the process of waiting for processing the input signal content subroutine at each video frame period (Vsync) time, and confirm the operation range of reducing the Motion Blur (MBR).
Fig. 6A and 6B are flowcharts illustrating a control method of an image display device according to another embodiment of the present disclosure. 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. Wherein, for example and without limitation, the first reference value and the second reference value are 120Hz and 240Hz, respectively. If step 610 is yes, then flow proceeds to step 615; if step 610 is negative, the flow ends.
In step 615, the zoom control chip 110 determines whether the backlight module 230 is in a reduced Motion Blur (MBR) mode. If the determination at step 615 is yes, the flow proceeds to step 620. If the determination at step 615 is negative, then flow proceeds to step 655.
In step 620, if in the MBR mode, the scaling control chip 110 notifies the host 150 to output a first image signal, wherein a first frame data in the first image signal has a first frequency (e.g., without limitation, 240 Hz), and the scaling control chip 110 sets the interlaced output black frame flag to on (e.g., without limitation, logic 1 to indicate that the interlaced output black frame function is on).
In step 625, the scaling control chip 110 determines whether the interlaced output black frame flag is on. If the determination at step 625 is yes, the flow proceeds to step 630. If the determination at step 625 is negative, then flow proceeds to step 635.
In step 630, when the interlaced-output black frame inserting flag is turned on, the zoom control chip 110 performs the interlaced-output black frame inserting, for example, the zoom control chip 110 performs the interlaced-output of a second frame data and a black frame inserting data, wherein the second frame data has a second frequency, and the second frequency is lower than the first frequency; and, when the MBR mode is exited, the zoom control chip 110 sets the interlaced output black frame flag to off (e.g., but not limited to, a logic 0, representing the interlaced output black frame function is off).
In one embodiment, in step 630, the scaling control chip 110 inserts the black frame into the first image signal outputted from the host 150, for example, but not limited to, the vertical synchronization signal of the first image signal outputted from the host 150 is N (N is a positive integer) Hz, and in one possible example, the scaling control chip 110 alternately outputs a second frame data (with (N/2) Hz) and a black frame data (with (N/2) Hz), thereby achieving 1/2 frequency division; alternatively, in another possible example, the scaling control chip 110 alternately outputs a second frame data (with (N/3) Hz) and a black frame data (with (n×2/3) Hz), thereby achieving 1/3 frequency division.
In step 635, when the interlaced black frame flag is currently turned off, the zoom control chip 110 does not perform the interlaced black frame, for example, the zoom control chip 110 continues to output the first image signal (i.e. does not insert the black frame) outputted from the host 150; and, the zoom control chip 110 sets the interlaced output black frame flag to on.
In step 640, it is determined whether the LED MBR backlight control mode has been turned on. If the determination at step 640 is yes, the flow proceeds to step 645. If the result of the determination in step 640 is negative, the flow proceeds to step 650.
In step 645, the scaling control chip 110 detects the currently outputted second frame data and black frame insertion frame data to output the corresponding set backlight PWM for brightness compensation.
In step 650, the scaling control chip 110 determines whether the frequency of the image signal outputted from the host 150 is still the first frequency (e.g., without limitation, 240 Hz). If the determination at step 650 is yes, the flow returns to step 610. If the determination result of step 650 is no, the flow returns to step 615 (i.e. when it is checked that the frequency of the image signal outputted by the host 150 is wrong, the scaling control chip 110 informs the host 150 to re-output the image signal with the first frequency).
In step 655, if the MBR mode is not in, the scaling control chip 110 compares whether the frequency of the vertical synchronization signal of the currently received image is the same as the frequency of the vertical synchronization signal stored last time. If step 655 is yes (the frequency is different), then in step 660, the scaling control chip 110 outputs the normal picture (with the last memorized vertical sync signal frequency). If step 655 is negative (same frequency), flow returns to step 610.
Fig. 7 shows a control method of an image display device according to an embodiment of the present disclosure, including: the zoom control chip determines that the image display device enters a reduced motion blur mode (710); the zoom control chip informs the host computer to transmit a first image signal, wherein the first frame data of the first image signal has a first frequency (720); and the zoom control chip outputs a second frame data and black frame inserting data in a staggered manner, wherein the second frame data has a second frequency, and the second frequency is lower than the first frequency (730). Details of steps 710-730 are described with reference to fig. 6A and 6B, and are omitted here.
In another embodiment of the present disclosure, when the MPRT function is switched, the zoom control chip is used to output the interlaced black frame, so that the LCD black frame inserting method can be achieved without modifying the backlight mechanism to improve the motion blur and eliminate the fluorescent pink residue.
Therefore, the image display device and the control method of the embodiment can be applied to electronic products in related fields such as personal computers, notebook computers, tablet devices, televisions, projectors and the like.
The invention has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (13)

1. A control method of an image display device, comprising:
receiving a first image signal transmitted by a host and displaying a picture, wherein first picture data in the first image signal has a first frequency;
determining that the image display device enters a dynamic blur reduction mode, and writing the frequency multiplication frequency of the vertical synchronizing signal into the storage unit; and
informing the host to read the storage unit, and the host to alternately output second picture data and black inserted picture data, wherein the second picture data has a second frequency, and the second frequency is higher than the first frequency.
2. The method according to claim 1, wherein the frequency of the vertical synchronization signal is written into the storage unit when it is determined that the image display device does not enter the motion blur reduction mode; and
informing the host to output the first frame data according to the frequency of the vertical synchronization signal.
3. The method of controlling an image display apparatus according to claim 1, further comprising:
when judging that the LED reduces the dynamic fuzzy backlight control mode to be started, controlling the backlight module by using a pulse width modulation mode; and
when the LED reduces the dynamic blur backlight control mode is turned off, the pulse width modulation mode is turned off, and the backlight module is enabled to continuously output backlight.
4. The method for controlling an image display apparatus according to claim 1, wherein,
the host judges whether an instruction for entering the dynamic blur reduction mode is received or an instruction for exiting the dynamic blur reduction mode is received;
when the host receives the command of entering the dynamic blur reducing mode, the host sets the vertical synchronizing signal by using the ascending frequency or the highest frequency; and
the host uses the up-conversion or the highest frequency to interleave the second frame data and the black frame.
5. The method for controlling an image display apparatus according to claim 4, wherein,
when the host receives the command of exiting the dynamic blur reduction mode, the host replies the vertical synchronizing signal; and
the host outputs the first frame data.
6. The method for controlling an image display apparatus according to claim 3,
when the backlight module is controlled in the pulse width modulation mode:
detecting the state of the current picture, and controlling the backlight module in a pulse width modulation mode in synchronization with the normal picture; or alternatively
Controlling the backlight module in a pulse width modulation mode in synchronization with the vertical synchronization signal; or alternatively
Detecting the current picture state and synchronizing with the normal picture to control the backlight module in an independent pulse width modulation mode.
7. An image display device, comprising:
scaling the control wafer;
a backlight module coupled to the zoom control chip; and
a storage unit coupled to the scaling control chip,
the image display device receives a first image signal transmitted by the host and displays a picture, wherein first picture data in the first image signal has a first frequency;
when the scaling control chip determines that the image display device enters a dynamic blur reduction mode, the scaling control chip writes the frequency multiplication frequency of the vertical synchronizing signal into the storage unit; and
the zoom control chip informs the host to read the storage unit, and the image display device receives the second picture data and the black frame inserting data which are output by the host in a staggered way, wherein the second picture data has a second frequency, and the second frequency is higher than the first frequency.
8. The image display device according to claim 7, wherein when the zoom control chip determines that the image display device does not enter the reduced motion blur mode, the zoom control chip writes the frequency of the vertical synchronization signal into the storage unit; and
the zoom control chip informs the host to output the first frame data according to the frequency of the vertical synchronization signal.
9. The image display device according to claim 7, wherein,
when judging that the LED reduces the dynamic fuzzy backlight control mode to be started, the scaling control chip controls the backlight module in a pulse width modulation mode; and
when the LED reduces the dynamic blur backlight control mode is turned off, the pulse width modulation mode is turned off, and the backlight module is enabled to continuously output backlight.
10. The image display device according to claim 9, wherein,
when the zoom control chip controls the backlight module in the pulse width modulation mode:
the zoom control chip detects the current picture state and synchronizes with the normal picture to control the backlight module in a pulse width modulation mode; or alternatively
The zoom control chip is synchronous with the vertical synchronous signal and controls the backlight module in a pulse width modulation mode; or alternatively
The zoom control chip detects the current picture state and controls the backlight module in a pulse width modulation mode independently in synchronization with the normal picture.
11. A control method of an image display device, comprising:
the zoom control chip judges that the image display device enters a dynamic blur reduction mode;
the zoom control chip informs the host computer to transmit a first image signal, wherein the first picture data of the first image signal has a first frequency; and
the zoom control chip outputs a second frame data and a black frame data in a staggered manner, wherein the second frame data has a second frequency, and the second frequency is lower than the first frequency.
12. The method of claim 11, wherein the zoom control chip sets the interlaced output black frame flag to on when the zoom control chip determines that the image display device enters the reduced motion blur mode.
13. The method for controlling an image display apparatus according to claim 12, wherein,
the zoom control chip confirms whether the interlaced output black frame insertion flag is on;
when the interlaced output black frame inserting flag is on, the zoom control chip interlaced outputs the second frame data and the black frame inserting data; and when the motion blur reducing mode is left, the zoom control chip sets the interleaved output black frame inserting flag to be off; and
when the interleaved output black frame inserting flag is off, the scaling control chip does not perform interleaved output black frame inserting; and the zoom control chip sets the interleaved output black frame insertion flag to be on.
CN202111455962.2A 2021-12-02 2021-12-02 Image display device and control method thereof Pending CN116229858A (en)

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Application Number Priority Date Filing Date Title
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