TWI679625B - Method for avoiding image sticking and display system - Google Patents

Abstract

A method for preventing image sticking includes obtaining a color tone state of a picture according to an input signal of a liquid crystal display panel within a predetermined time interval; if the color tone state of the picture remains stable, painting in at least one of a plurality of areas of the picture Pixels are flipped; and after pixels in at least one area of the frame are flipped, if the hue state of the frame changes from a stable state to an unstable state, the pixels in the frame are temporarily flipped.

Description

Method for preventing image sticking and display system

The invention discloses a method and a display system for preventing image sticking, and more particularly, a method and a display system for preventing image sticking by using pixel inversion.

Liquid crystal display (Liquid Crystal Display, LCD) and organic light emitting diode (OLED) display devices have been widely used in multimedia players due to their advantages such as lightness, thinness, power saving, and no radiation. , Mobile phones, personal digital assistants, computer monitors, or flat-screen TVs.

A pixel of a liquid crystal display device is an element having a liquid crystal. When liquid crystal is used on a display, the electro-optic effect and optical rotation of the liquid crystal are used to generate images. The photoelectric effect refers to a certain arrangement state of liquid crystal molecules, and the arrangement state of the liquid crystal molecules is changed to another type by an external electric field, thereby causing changes in the optical properties of the liquid crystal film. Optical rotation property means that when a light signal passes through liquid crystal molecules, the polarization plane of the liquid crystal molecules rotates. In addition, the liquid crystal itself has a special characteristic, that is, the DC voltage cannot be applied too much or too long to the liquid crystal, so as not to cause damage to the liquid crystal molecules, and lose the relationship between the original voltage and light penetration. Therefore, when driving liquid crystal molecules, a voltage is often applied in an AC manner to avoid being damaged by a DC voltage and affecting the optical characteristics of the liquid crystal.

However, if the liquid crystal display device displays a static image for a long time (e.g. no input signal, or It is the user who temporarily suspends the transmission of the input signal to the liquid crystal display device), which may cause a residual image on the display screen of the liquid crystal display device. This phenomenon is called afterimage or image sticking. In other words, when the liquid crystal molecules are left unused for a long time, the liquid crystal molecules will be elastically fatigued and the image will be prone to unpleasant afterimages.

An embodiment of the present invention provides a method for preventing image sticking, which includes obtaining a color tone state of a frame according to an input signal of a liquid crystal display panel within a predetermined time interval. Pixels in at least one region of the frame are flipped; and after pixels of at least one region in the frame are flipped, if the hue state of the frame changes from a stable state to an unstable state, the pixels in the frame are temporarily flipped.

Another embodiment of the present invention provides a display system including a liquid crystal display panel, a processor, and a memory. The liquid crystal display panel is used for displaying pictures. The processor is coupled to the liquid crystal display panel, and is used for selectively inverting pixels of the picture according to the hue state of the picture. The memory is coupled to the processor, and is used for storing a plurality of parameters for flipping the pixels of the picture. The processor obtains the hue state of the picture according to the input signal of the liquid crystal display panel within a predetermined time interval. If the hue state of the picture remains stable, the processor flips pixels in at least one of the plurality of regions of the picture And after the pixels in at least one area in the frame are reversed, if the hue state of the frame changes from a stable state to an unstable state, the processor suspends reversing the pixels in the frame.

100‧‧‧display system

10‧‧‧LCD display panel

11‧‧‧ processor

12‧‧‧Memory

A1 to AK, C1 to CK and R1 to RK‧‧‧

Y‧‧‧gain axis

X‧‧‧ Timeline

△ 1 to △ 5‧‧‧Average change

AVG1 to AVG4 ‧‧‧ average

P‧‧‧Pixel flip cycle

T1‧‧‧ scheduled time zone

T2‧‧‧ Triggered image still time

Steps S901 to S904‧‧‧‧

FIG. 1 is a structural diagram of an embodiment of a display system of the present invention.

FIG. 2 is the display system of FIG. 1. The screen displayed by the liquid crystal display panel is divided into a plurality of rectangular areas. Domain schematic.

FIG. 3 is a schematic diagram of dividing the screen displayed by the liquid crystal display panel into a plurality of linear regions arranged in rows in the display system of FIG. 1.

FIG. 4 is a schematic diagram of dividing the screen displayed by the liquid crystal display panel into a plurality of linear regions arranged in columns in the display system of FIG. 1.

FIG. 5 is a schematic diagram of the average variation amount of the average value of the hue gain when the hue state of the screen remains stable in the display system of FIG. 1.

FIG. 6 is a schematic diagram of the average variation amount of the average value of the hue gain in the display system of FIG. 1 when the hue state of the screen is in an unstable state.

FIG. 7 is a schematic diagram of the first mode of executing the pixel flipping procedure after the hue state of the screen maintains a stable state in the display system of FIG. 1.

FIG. 8 is a schematic diagram of the second mode of executing the pixel flipping procedure after the hue state of the screen maintains a stable state in the display system of FIG. 1.

FIG. 9 is a flowchart of a method for preventing image sticking in the display system of FIG. 1. FIG.

FIG. 1 is a structural diagram of an embodiment of a display system 100 according to the present invention. The display system 100 includes a liquid crystal display panel 10, a processor 11, and a memory 12. The liquid crystal display panel 10 is used for displaying pictures. The liquid crystal display panel 10 may include a plurality of liquid crystal pixels, and each liquid crystal pixel has an electro-optic effect and an optical rotation property. Each liquid crystal pixel can change the arrangement state of liquid crystal molecules through an external electric field, thus causing its optical properties to change. The processor 11 is coupled to the liquid crystal display panel 10, and is configured to selectively flip the pixels of the screen according to the hue state of the screen. The processor 11 may be any type of processor, such as a chip processor (scaler) inside the display, an external central processing unit, or a microprocessor. The processor 11 can capture input to the liquid crystal display panel 10 Video signal. In other words, the image signal captured by the processor 11 can be regarded as the "original" picture signal input into the liquid crystal display panel 10, so even if the liquid crystal display panel 10 has problems such as image degradation, image display delay, and color shift, The picture captured by the processor 11 will not be affected. The memory 12 is coupled to the processor 11 and is configured to store a plurality of parameters for inverting pixels of a picture. For example, the memory 12 may store the shape of each region of the picture divided into a plurality of regions, the number of pixels of each region, and the pixel flip period of at least one of the regions described below. In the display system 100, the liquid crystal display panel 10, the processor 11, and the memory 12 can be integrated into a display covered by a casing. The processor 11 can obtain the hue state of the picture according to the input signal of the liquid crystal display panel 10 within a predetermined time interval. The definition of the input signal can be any form of image transmission signal, such as Video Graphics Array (VGA) signal, High Definition Multimedia Interface (HDMI) signal, Display Port (DP) signal and so on. If the hue state of the picture remains stable, the processor 11 may flip pixels in at least one of the regions of the picture. The purpose of the processor 11 for inverting the pixels is to avoid the fatigue fatigue of the liquid crystal molecules in the pixels. After the pixels in at least one area of the screen are flipped, if the hue state of the screen changes from a stable state to an unstable state, it means that the data of the input signal input to the liquid crystal display panel 10 changes, and the liquid crystal display panel 10 starts to display Dynamic picture. Therefore, the processor 11 may pause flipping the pixels in the picture. The details of the display system 100 performing the pixel flipping procedure to avoid elastic fatigue of the liquid crystal molecules will be described in detail later.

FIG. 2 is a schematic diagram of dividing the screen displayed by the liquid crystal display panel 10 into a plurality of rectangular areas A1 to AK in the display system 100. The processor 11 may virtually divide the screen displayed by the liquid crystal display panel 10 into a plurality of rectangular areas A1 to AK, where K is a positive integer. The number of pixels in each rectangular area can be M, where M is a positive integer. In addition, the higher the resolution supported by the liquid crystal display panel 10, the greater the number of pixels per rectangular area. For example, the resolution supported by the liquid crystal display panel 10 is N pixels. When the liquid crystal display panel 10 supports a Full High Definition (FHD) resolution, N is 1920 × 1080. At this time, the number of pixels in each rectangular area can be set to 4, which means M = 4. therefore, The screen displayed by the liquid crystal display panel 10 can be divided into (1920 × 1080) / 4 = 518400 regions, which means that K = N / M = 518400. Since a picture with a resolution of N is divided by a region of M pixels, N is greater than or equal to M, and N is a multiple of M. However, the method for generating the plurality of rectangular areas A1 to AK used to divide the picture according to the present invention is not limited by the above. For example, the plurality of rectangular areas A1 to AK used to divide the picture may be rectangular areas of different sizes. The plurality of rectangular areas A1 to AK used to divide the screen can also be changed into linear areas, dot areas, or even merged into a full-screen area (K = 1). Any reasonable technical change belongs to the scope disclosed by the present invention. However, for the convenience of description, the following description still uses a plurality of regions with the same number of pixels (M pixels) for description. As shown in FIG. 2, after the processor 11 divides the screen displayed by the liquid crystal display panel 10 into a plurality of rectangular areas A1 to AK, the processor 11 can periodically and randomly divide the rectangular areas A1 of the screen in a random manner. To AK, pixels in at least one rectangular area are flipped. For example, the processor 11 may generate a random sequence of regions, such as the sequence of regions A1, A3, AK-1, A2,... Then, the processor 11 may periodically flip all or part of the pixels in each rectangular region pointed by the region sequence at the same time according to a random region sequence. However, the processor 11 may also use a non-random manner to periodically flip pixels in at least one of the rectangular areas A1 to AK of the picture. For example, the processor 11 may flip all or part of the pixels in each rectangular area simultaneously in the order of A1, A2, A3,.... In addition, the processor 11 may simultaneously flip all or part of the pixels in each of the rectangular areas A1 to AK at the same time. The processor 11 may also only flip a specific number of regions or all the partial pixels of a specific number simultaneously in a random manner. In addition, the processor 11 may perform full-screen pixel flipping on the liquid crystal display panel 10. For example, each region may include only one pixel M = 1, and the processor may simultaneously flip all regions (equivalent to turning all pixels of the LCD panel 10). Any reasonable pixel flipping mode transformation belongs to the category disclosed by the present invention. After the pixels are flipped, the elasticity of the liquid crystal molecules will be restored, so the problem of image sticking due to fatigue fatigue can be avoided.

FIG. 3 shows the screen displayed by the liquid crystal display panel 10 in the display system 100. A schematic diagram of the linear regions C1 to CK arranged in rows. FIG. 4 is a schematic diagram of the display system 100 dividing the screen displayed by the liquid crystal display panel 10 into a plurality of linear regions R1 to RK arranged in columns. As mentioned above, the plurality of rectangular areas A1 to AK used for dividing the screen may also be changed to linear areas. Therefore, as shown in FIG. 3, the screen displayed by the liquid crystal display panel 10 can be divided into a plurality of linear regions C1 to CK arranged in rows. The dimension of each linear region can be M × 1. Therefore, the processor 11 can flip all or part of the pixels of each of the linear regions C1 to CK from the left-to-right direction at the same time. The processor 11 may also randomly flip all or part of the pixels of each of the linear regions C1 to CK at the same time. In addition, as shown in FIG. 4, the screen displayed by the liquid crystal display panel 10 may be divided into a plurality of linear regions R1 to RK arranged in columns. The dimension of each linear region can be 1 × M. Therefore, the processor 11 can flip all or part of the pixels of each of the linear regions R1 to RK in a top-to-bottom direction simultaneously. The processor 11 may also randomly flip all or part of the pixels of each of the linear regions R1 to RK at the same time.

As mentioned above, the plurality of regions used for dividing the screen may be linear regions, dotted regions, or rectangular regions. The picture can also be filled by a single area (full picture area, K = 1). If the areas are dot-shaped areas, the processor 11 may perform dot-inversion processing on pixels in at least one of the areas of the screen. If the regions are linear regions, the processor 11 may perform column inversion processing or column inversion processing on pixels in at least one of the regions of the screen. If the picture is only occupied by a single area (full picture area, K = 1), the processor 11 may perform frame inversion on all pixels of the picture. No matter which pixel flipping mode the processor 11 executes, the elasticity of the liquid crystal molecules of the flipped pixels will be restored, so the problem of image sticking due to fatigue fatigue can be avoided.

、綠色光參數的平均 值

、藍色光參數的平均值

、紅色與綠 色光參數的平均值

、綠色與藍色光參數的平均值

、紅色與藍色光參數的平均值

、或是所有三原色光參數的平均值

。應當理解的是，使用者可以依據輸入訊號的畫面內容，選擇性地調整平均值的計算方式，以降低運算複雜度。例如，若輸入訊號的畫面內容僅對應藍天白雲，則使用者可以將平均值AVG1指定為用藍色光參數的平均值的計算方式以降低複雜度。然而，在一般的情況中，為了避免處理器11忽略掉某些色光參數而做出錯誤的判斷，色調增益的平均值AVG1可選用所有三原色光參數的平均值，意即：

FIG. 5 is a schematic diagram of the average change amount Δ1 of the average value AVG1 of the tone gain of the display system 100 when the tone state of the screen remains stable. The X axis is the time axis and the Y axis is the gain axis. As mentioned above, if the hue state of the picture remains stable, the processor 11 may flip pixels in at least one of the regions of the picture. The following will detail how to determine that the hue state of the picture remains stable. First, the processor 11 may continuously obtain the three primary color light parameters of each pixel in the picture within a predetermined time interval T1 and according to the input signal of the liquid crystal display panel 10, and generate at least one of the three primary color light parameters of all pixels in the picture The average value of one shade parameter AVG1. For example, when the liquid crystal display panel 10 supports a Full HD FHD resolution, the total number of pixels is 1920 × 1080. Therefore, the pixels of the liquid crystal display panel 10 can be expressed as P ₁ , P ₂ ... To P _{1920 × 1080} . Each pixel will have its own three primary color light parameters. Here, the three primary color light parameters can be defined as red light parameters, green light parameters, and blue light parameters. The definition of "parameter" can be the gain amount, and it can also be regarded as the operating point of each pixel on the hue coordinate (such as RGB coordinate). Therefore, the three primary color light parameters of the pixels of the liquid crystal display panel 10 can be expressed as P ₁ (R ₁ , B ₁ , G ₁ ), P ₂ (R ₂ , B ₂ , G ₂ ) ... to P _{1920 × 1080} ( R _{1920 × 1080} , B _{1920 × 1080} , G _{1920 × 1080} ). Next, the processor 11 may generate an average value AVG1 of at least one color light parameter among three primary color light parameters of all pixels in the picture, for example, generate an average value of red light parameters.

, The average value of green light parameters

Average of blue light parameters

Of red, green and green light parameters

, Green and blue light parameters

Of red, blue and blue light parameters

Or the average of all three primary light parameters

. It should be understood that the user can selectively adjust the calculation method of the average value according to the screen content of the input signal to reduce the computational complexity. For example, if the picture content of the input signal only corresponds to blue sky and white clouds, the user can specify the average value AVG1 as a calculation method of the average value of the blue light parameter to reduce the complexity. However, in the general case, in order to avoid the processor 11 from ignoring certain color light parameters and making a wrong judgment, the average value of the tone gain AVG1 can choose the average value of all three primary color light parameters.

More generally, when the liquid crystal display panel 10 supports a resolution with a total pixel of N, the average value of the tone gain AVG1 can be

The processor 11 may continuously calculate a change in the average value AVG1 of the tone gain within a predetermined time interval T1. It should be understood that due to electromagnetic wave interference, thermal noise, voltage fluctuations and other factors, the input signal of the liquid crystal display panel 10 will still slightly change. In other words, even when the picture is set to a stationary state, the average value of the tone gain AVG1 fluctuates slightly. Therefore, after the processor 11 continuously calculates the change in the average value AVG1 of the tone gain within a predetermined time interval T1, the average value variation Δ1 corresponding to the average value AVG1 of the tone gain can be generated. If the average variation Δ1 is less than the threshold value (for example, less than 5% to 10% of the maximum average gain) within the predetermined time interval T1, it means that the picture is stationary and the pixels are stable. The processor 11 flips (partially or completely) pixels in at least one of the areas of the picture. In FIG. 5, the predetermined time interval T1 and the frame still time T2 that triggers the afterimage phenomenon may be stored in the memory 12, and the predetermined time interval T1 is shorter than the frame still time T2 that triggers the afterimage phenomenon. The reason is described below. After the liquid crystal molecules have been idle for a long time, elastic fatigue occurs. The time required for elastic fatigue to occur is called the frame still time T2 for triggering the afterimage phenomenon, for example, 30 minutes. In order to avoid the afterimage phenomenon, the display system 100 cannot leave the liquid crystal molecules idle for too long and the elasticity is fatigued. Therefore, the predetermined time interval T1 must be shorter than the frame still time T2 that triggers the afterimage phenomenon. When the processor 11 determines that the picture is still within the predetermined time interval T1, while the liquid crystal molecules are not yet elastically fatigued, the processor 11 must flip (partially or fully) the pixels in at least one of the areas of the picture so that The liquid crystal molecules recover elasticity. In this way, the elasticity of the liquid crystal molecules can be maintained and the occurrence of the afterimage phenomenon can be avoided.

FIG. 6 is a schematic diagram of the average fluctuation amount of the average value AVG2 of the tone gain when the tone state of the screen is in an unstable state in the display system 100. As mentioned earlier, the flatness of the tone gain The average value AVG2 may be an average value of at least one color light parameter among three primary color light parameters of all pixels. After the processor 11 continuously calculates the change in the average value AVG2 of the tone gain within a predetermined time interval T1, an average amount of change Δ2 corresponding to the average value AVG2 of the tone gain can be generated. If the average variation Δ2 is greater than a threshold value (for example, a maximum average gain greater than 5% to 10%) within a predetermined time interval T1, it means that the picture is dynamic and the pixels are in an unstable state. Therefore, in FIG. 6, even if the screen displayed on the liquid crystal display panel 10 has passed the “frame still time T2 that triggers the afterimage phenomenon”, the image does not cause an afterimage phenomenon. The reason is that the pixel is in an unstable state within a predetermined time interval T1, so the liquid crystal molecules in the pixel do not suffer from elastic fatigue in a short time. In FIG. 6, since the pixels do not suffer from elastic fatigue in a short period of time, the processor 11 does not need to flip (partially or completely) the pixels in at least one of the regions of the picture. The processor 11 continuously monitors the hue state of the picture to ensure that the pixels do not suffer from elastic fatigue and avoid the afterimage phenomenon.

FIG. 7 is a schematic diagram of a first mode of executing a pixel flipping procedure in the display system 100 after the hue state of the screen maintains a stable state. As mentioned earlier, when the average value change amount Δ3 is smaller than the threshold value within the predetermined time interval T1, it means that the picture is stationary and the pixels are stable. The processor 11 flips (partially or completely) pixels in at least one of the areas of the picture. For example, the processor 11 may flip pixels in at least one region in the aforementioned random or non-random manner. The period for the processor 11 to flip the pixels may be P, and P may be several milliseconds to several seconds. When the processor 11 flips the pixels, it also continues to calculate the average value AVG3 of the hue gain and the corresponding average amount of change Δ3. If the average change amount Δ3 of the average value of the tone gain AVG3 is always smaller than the threshold value, it means that the picture remains still. The processor 11 may execute a pixel flipping program with a cycle P again. In addition, when the picture is kept still, the interval between two pixel flipping procedures can be customized by the user. However, the interval between the two pixel flipping procedures should be less than the length of the frame still time T2 that triggers the afterimage phenomenon to avoid the phenomenon of elastic fatigue of the liquid crystal molecules in the pixels due to being idle for too long.

FIG. 8 shows that in the display system 100, after the hue state of the screen remains stable, Schematic diagram of the second mode of the line pixel flipping program. As mentioned above, when the average value change amount Δ4 is smaller than the threshold value within the predetermined time interval T1, it means that the picture is stationary and the pixels are stable. The processor 11 flips (partially or completely) pixels in at least one of the areas of the picture. For example, the processor 11 may flip pixels in at least one region in the aforementioned random or non-random manner. The period for the processor 11 to flip the pixels may be P, and P may be several milliseconds to several seconds. When the processor 11 flips the pixels, it also continues to calculate the average value AVG4 of the hue gain and the corresponding average amount of change Δ4. In FIG. 8, the average change amount Δ4 of the average value of the tone gain AVG4 is increased to the average change amount Δ5 after the pixel inversion program with the period P is executed. If the average change amount Δ5 is greater than the threshold value, it means that the picture has become dynamic and the pixels have become unstable. Therefore, the liquid crystal molecules in the pixels do not suffer from elastic fatigue in a short time. In FIG. 8, after the processor 11 executes a pixel flipping program with a period of P to flip pixels in at least one area of the screen, if the hue state of the screen changes from a stable state to an unstable state (average amount of change) Δ5 is greater than the threshold value), the processor 11 may suspend flipping pixels in the picture.

FIG. 9 is a flowchart of a method for preventing image sticking in the display system 100. The flow of the method for preventing image sticking includes steps S901 to S904. Any reasonable technical change belongs to the scope disclosed by the present invention. Steps S901 to S904 are described below. Step S901: Set a plurality of parameters for pixel inversion; Step S902: Obtain the hue state of the picture according to the input signal of the liquid crystal display panel 10 within the predetermined time interval T1; Step S903: Determine the hue state of the picture according to the threshold Whether it is stable; if not, go back to step S902 to continue monitoring the hue state of the picture; if so, go to step S904; step S904: flip the pixels in at least one of the plurality of areas of the picture and return to step S902 to continue monitoring The hue state of the picture.

In step S901, the plurality of parameters for setting the pixel flip may include setting the shape of each of the regions, the number of pixels, the period of the pixel flip, and the pixel flip mode. Wait. However, step S901 may be a parameter manually set by the user, a fixed parameter predetermined by the system, or a parameter generated through a look-up table according to the resolution of the liquid crystal display panel 10. In addition, the details of steps S902 to S904 have been described in detail in the foregoing, so they will not be repeated here. The display system 100 utilizes steps S901 to S904 to avoid elastic fatigue of the liquid crystal molecules in the pixels caused by the screen being stationary for a long time, thereby avoiding the phenomenon of afterimages in the screen.

In summary, the present invention describes a display system with a function of preventing image sticking. The display system determines whether the picture is still according to the variation of the average value of the three primary color gains of all pixels in the picture. When the picture is still, the hue state of the picture will maintain a stable state. In order to avoid elastic fatigue of the liquid crystal molecules in the pixels, the display system will flip the pixels in at least one of the plurality of areas of the picture. After the pixels are flipped, the elasticity of the pixels is restored. Therefore, the flipped pixels will not suffer from elastic fatigue in a short time. Since the display system can avoid elastic fatigue of the liquid crystal molecules, it can also avoid unpleasant afterimages on the display screen.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.

Claims (16)

A method for preventing image sticking includes: obtaining a tone state of a picture within a predetermined time interval according to an input signal of a liquid crystal display panel; and if the tone state of the picture maintains a stable state, the picture is Pixels in at least one of the plurality of regions are flipped; and after pixels in the at least one region in the frame are flipped, if the hue state of the frame is changed from the stable state to an unstable state, The pixels in the picture are temporarily flipped; the predetermined time interval is less than a picture rest time that triggers the picture displayed by the liquid crystal display panel to produce a afterimage phenomenon. The method according to claim 1, wherein in the predetermined time interval, obtaining the hue state of the screen according to the input signal of the liquid crystal display panel includes: in the predetermined time interval, according to the liquid crystal display panel. The input signal continuously obtains the three primary color light parameters of each pixel in the picture; and generates an average value of at least one color light parameter among the three primary color light parameters of all pixels in the picture; wherein the at least one color light parameter is one At least one of a red light parameter, a green light parameter, and a blue light parameter. The method according to claim 2, wherein if the hue state of the picture maintains the stable state, flipping pixels in at least one of the regions of the picture includes: if the average of the at least one color light parameter A variation of the value within the predetermined time interval is less than a threshold value, and pixels in the at least one area of the areas of the picture are flipped. The method according to claim 1, wherein in the predetermined time interval, obtaining the hue state of the screen according to the input signal of the liquid crystal display panel includes: in the predetermined time interval, according to the liquid crystal display panel. The input signal continuously obtains the three primary color light parameters of each pixel in the picture; and generates an average value corresponding to the three primary color light parameters of all pixels in the picture according to the three primary light parameters of all pixels in the picture. The method according to claim 1, further comprising: setting a shape of each of the regions; setting a number of pixels of each of the regions; and setting at least one of the regions A period of flipping the pixels; the flipping of the pixels in the at least one of the areas of the picture is to periodically use the random method to periodically rotate the at least one of the areas of the picture The pixels in the area are flipped. The method according to claim 1, wherein the pixels in the at least one area of the areas of the picture are flipped at the same time so that all or part of the pixels in each of the at least one area are simultaneously Flip. A method for preventing image sticking includes: obtaining a tone state of a picture within a predetermined time interval according to an input signal of a liquid crystal display panel; and if the tone state of the picture maintains a stable state, the picture is Pixels in at least one of the plurality of regions are flipped; and after pixels in the at least one region in the frame are flipped, if the hue state of the frame is changed from the stable state to an unstable state, Pause the flipping of the pixels in the picture; if the areas are point-like areas, flipping the pixels in the at least one of the areas of the picture is to flip the pixels in the areas of the picture Dot-inversion processing is performed on the pixels in at least one area, and if the areas are linear areas, the pixels in the at least one area of the areas of the frame are flipped as the areas of the frame. Pixels in the at least one of the regions are subjected to a row inversion (Column Inversion) process or a column inversion (Row Inversion) process. A method for preventing image sticking includes: obtaining a tone state of a picture within a predetermined time interval according to an input signal of a liquid crystal display panel; and if the tone state of the picture maintains a stable state, the picture is Pixels in at least one of the plurality of regions are flipped; and after pixels in the at least one region in the frame are flipped, if the hue state of the frame is changed from the stable state to an unstable state, Pause the flipping of pixels in the picture; wherein if the hue state of the picture maintains the stable state, flipping the pixels in the at least one of the regions of the picture is if the hue of the picture The state maintains the stable state, and pixels in all regions of the screen are subjected to a frame inversion process (Frame Inversion). A display system includes: a liquid crystal display panel for displaying a picture; a processor coupled to the liquid crystal display panel for selectively inverting pixels of the picture according to a hue state of the picture; And a memory, coupled to the processor, for storing a plurality of parameters for flipping pixels of the picture; wherein the parameters stored in the memory include a predetermined time interval, and the predetermined time interval is less than the trigger The picture displayed by the liquid crystal display panel has a picture still time during which an afterimage phenomenon occurs. The processor obtains the hue state of the picture within the predetermined time interval according to an input signal of one of the liquid crystal display panels. The hue state of the picture maintains a stable state, the processor flips pixels in at least one of the plurality of regions of the picture, and after the pixels in the at least one region in the picture are flipped, if the The hue state of the picture changes from the stable state to an unstable state, and the processor pauses to flip pixels in the picture. The system according to claim 9, wherein the processor continuously obtains the three primary color light parameters of each pixel in the picture within the predetermined time interval and according to the input signal of the liquid crystal display panel, and generates the picture in the picture. Among the three primary color light parameters of all pixels, an average value of at least one color light parameter, and the at least one color light parameter is at least one of a red light parameter, a green light parameter, and a blue light parameter. The system according to claim 10, wherein if the average value of the at least one color light parameter within a predetermined time interval is less than a threshold value, the processor changes the at least one of the areas of the screen. The pixels in the area are flipped. The system according to claim 9, wherein the processor continuously obtains the three primary color light parameters of each pixel in the picture according to the input signal of the liquid crystal display panel within the predetermined time interval, and according to the picture in the picture The three primary color light parameters of all pixels generate an average value corresponding to the three primary color light parameters of all pixels in the picture. The system according to claim 9, wherein the parameters stored in the memory include a shape of each of the regions, a number of pixels of each of the regions, and / or the regions The pixels in at least one of the regions are flipped for one cycle, and the processor periodically flips the pixels in the at least one of the regions of the frame in a random manner. The system according to claim 9, wherein the processor flips all or part of the pixels in each of the at least one area simultaneously. A display system includes: a liquid crystal display panel for displaying a picture; a processor coupled to the liquid crystal display panel for selectively inverting pixels of the picture according to a hue state of the picture; And a memory, coupled to the processor, for storing a plurality of parameters for flipping the pixels of the picture; wherein the processor obtains, according to an input signal of one of the liquid crystal display panels, within a predetermined time interval, and obtains The hue state of the picture, if the hue state of the picture maintains a stable state, the processor flips pixels in at least one of a plurality of regions of the picture, and in the at least one region of the picture After the pixels of the frame are flipped, if the hue state of the picture changes from the stable state to an unstable state, the processor suspends flipping the pixels in the picture; and if the areas are dotted areas, the The processor performs a dot-inversion process on the pixels in the at least one of the areas of the picture, and if the areas are linear areas, the processor The pixels of a region within the at least one row inversion (Column Inversion) process or an inversion (Row Inversion) process in these regions. A display system includes: a liquid crystal display panel for displaying a picture; a processor coupled to the liquid crystal display panel for selectively inverting pixels of the picture according to a hue state of the picture; And a memory, coupled to the processor, for storing a plurality of parameters for flipping the pixels of the picture; wherein the processor obtains, according to an input signal of one of the liquid crystal display panels, within a predetermined time interval, and obtains The hue state of the picture, if the hue state of the picture maintains a stable state, the processor flips pixels in at least one of a plurality of regions of the picture, and in the at least one region of the picture After the pixels of the frame are flipped, if the hue state of the picture changes from the stable state to an unstable state, the processor suspends flipping the pixels in the picture; and if the hue state of the picture maintains the stability State, the processor performs frame inversion on pixels in all regions of the screen.