A liquid crystal device resolution enhancement control method, device and liquid crystal device

Abstract

The application relates to a resolution improvement control method and device of a liquid crystal device and the liquid crystal device. The method comprises the following steps: S1, acquiring a high-resolution image to be displayed, and decomposing the high-resolution image to obtain a plurality of low-resolution images; S2, judging whether a current high-resolution image display period is a positive display period or a negative display period; S31, in the positive display period, controlling an array of display units to display the plurality of low-resolution images in a first order in time, and simultaneously controlling the direction of a galvanometer to offset the position of the plurality of low-resolution images; S32, in the negative display period, controlling the array of display units to display the plurality of low-resolution images in a second order in time, and simultaneously controlling the direction of the galvanometer to offset the position of the plurality of low-resolution images; and S4, returning to step S1 to acquire a new high-resolution image. The application changes the display order of the plurality of low-resolution images, thereby reducing the risk of image sticking and screen burning of the liquid crystal device when the resolution is improved.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal displays, and in particular to a method, apparatus, and liquid crystal device for controlling resolution enhancement in a liquid crystal device. Background Technology

[0002] A 3LCD projector is a projection device based on three-panel liquid crystal display technology. It decomposes white light into the three primary colors of red, green and blue, modulates them separately and then synthesizes them into a full-color image. It has the advantages of high color brightness, high color accuracy, good image stability and energy saving and environmental protection. It is now widely used in home theaters, conferences, classrooms and exhibitions.

[0003] Please see Figure 1 , Figure 1 This is a schematic diagram illustrating the structure and principle of a display unit in an existing 3LCD projector. An existing 3LCD projector includes a display unit array consisting of multiple display units and a control device. Each display unit A includes: a light source 1, a beam splitting unit 2, and a color combining prism 3. The light source 1 generates a white beam, which is then split into a red beam, a green beam, and a blue beam by the beam splitting unit 2. The color combining prism 3 is a cubic prism, with a red liquid crystal panel 31, a green liquid crystal panel 32, and a blue liquid crystal panel 33 on its three sides. The red, green, and blue beams are respectively incident on the red, green, and blue liquid crystal panels 31, 32, and 33 of the color combining prism 3. After being filtered by these panels, they are combined into a colored beam inside the color combining prism 3 and finally exit from the fourth side of the color combining prism 3.

[0004] The control device controls the driving voltage of the red, green, and blue liquid crystal panels 31, 32, and 33, thereby controlling their transmittance and thus the ratio of the red, green, and blue beams 33 when synthesizing a colored beam, to obtain a colored beam of any specified color. A colored beam emitted from one display unit A corresponds to a colored pixel in the image. Multiple display units A form a display unit array, and all the pixels corresponding to the display unit array constitute the complete image content. The control device controls the image content displayed by the display unit array by controlling the color of each pixel corresponding to each display unit A in the display unit array.

[0005] As we know from the working principle of 3LCD projectors, the number of pixels (i.e., the resolution) of the image displayed by the projector depends on the number of display units inside the projector. For the same projector, the number of display units inside is fixed, but users have a need to increase the image resolution.

[0006] Chinese patent CN117631274A discloses a resolution enhancement method based on galvanometer scanning. This method involves placing a galvanometer in the output optical path of a display unit. By controlling the movement of the galvanometer, each frame of the image displayed by the display unit array is shifted by half a pixel. Utilizing the persistence of vision and visual synthesis capabilities of the human eye, multiple low-resolution images displayed by the display unit array in a time-division manner are superimposed into a high-resolution image in the human eye. However, when this resolution enhancement method is applied to LCD devices such as 3LCD projectors, it easily produces image retention and screen burn-in problems, which not only affect the user experience but may even damage the LCD panel in severe cases. Summary of the Invention

[0007] Based on this, the purpose of the present invention is to provide a resolution enhancement control method, apparatus and liquid crystal device for liquid crystal devices, which can not only overcome hardware limitations to display high-resolution images, but also avoid image retention and screen burn-in problems.

[0008] This invention provides a resolution enhancement control method for a liquid crystal device, comprising the following steps: S1, acquiring a high-resolution image to be displayed, and decomposing the high-resolution image to obtain multiple low-resolution images; S2, determining whether the current high-resolution image display cycle is a positive or negative display cycle; S31, in a positive display cycle, controlling the display unit array to display the multiple low-resolution images in a time-division multiplexing manner according to a preset first order, while simultaneously shifting the position of the multiple low-resolution images by controlling the direction of the galvanometer; S32, in a negative display cycle, controlling the display unit array to display the multiple low-resolution images in a time-division multiplexing manner according to a preset second order, while simultaneously shifting the position of the multiple low-resolution images by controlling the direction of the galvanometer; S4, returning to step S1 to acquire a new high-resolution image to enter the next high-resolution image display cycle.

[0009] This invention controls a galvanometer to time-shift the display of images, allowing multiple low-resolution images to be superimposed on each other to create a high-resolution image in the human eye. This enables LCD devices to overcome the limitations of their native hardware resolution and display high-resolution images, meeting users' demands for high-resolution display. Furthermore, this invention addresses the compatibility issue between the resolution enhancement method and the frame-by-frame inversion mechanism of the LCD device's driving voltage. By changing the display order of multiple low-resolution images, it solves the problems of image retention and burn-in that easily occur when LCD devices increase resolution, balancing high resolution and safety, improving user experience, and extending the lifespan of the LCD device.

[0010] Furthermore, the arrangement of the positive display cycle and the negative display cycle satisfies the following condition: the number of positive display cycles and the number of negative display cycles are equal within a preset time period.

[0011] Further, step S2 specifically involves: if the nth high-resolution image display cycle is a positive display cycle, then the current high-resolution image display cycle is a negative display cycle; if the nth high-resolution image display cycle is a negative display cycle, then the current high-resolution image display cycle is a positive display cycle; n is a preset constant.

[0012] Furthermore, the preset constant n = 1; step S2 is specifically as follows: if the previous high-resolution image display cycle is a positive display cycle, then the current high-resolution image display cycle is a negative display cycle; if the previous high-resolution image display cycle is a negative display cycle, then the current high-resolution image display cycle is a positive display cycle.

[0013] Further, let N be the number of low-resolution images in multiple frames, and let N low-resolution images be the 1st low-resolution image, the 2nd low-resolution image, ..., the Nth low-resolution image; the first order mentioned in step S31 is represented by the first order array Rank1[] = {1,2,...,N}; the time-sharing display of the multiple low-resolution images in step S31 according to the preset first order is specifically as follows: according to the display order of the first order array Rank1[], the Rank1[1] low-resolution image, the Rank1[2] low-resolution image, ..., the Rank1[N] low-resolution image are displayed in time-sharing; where Rank1[i] represents the i-th element in the first order array Rank1[], and i is any integer in the closed interval [1,N].

[0014] Further, the second order mentioned in step S32 is represented by the second order array Rank2[]; the second order array Rank2[] is specifically: the reverse array Rank21[] = {N,N-1,...,1} or the transformation array Rank22[] = Transform(Rank21); where Transform(Rank21) represents the transformation array formed by exchanging any pair of elements in the reverse array Rank21[] that are both in odd or even positions; then the time-sharing display of the multiple frames of low-resolution images according to the preset second order mentioned in step S32 is specifically: according to the display order of the second order array Rank2[], the Rank2[1] low-resolution image, the Rank2[2] low-resolution image, ..., the Rank2[N] low-resolution image are displayed in time-sharing; where Rank2[i] represents the i-th element in the second order array Rank2[], and i is any integer in the closed interval [1,N].

[0015] Furthermore, the number of low-resolution images is N=4; the first sequential array Rank1[]={1,2,3,4}; the second sequential array Rank2[]={4,3,2,1}, {2,3,4,1}, {4,1,2,3} or {2,1,4,3}.

[0016] Furthermore, the number of low-resolution images is N=2; the first sequential array Rank1[]={1,2}; the second sequential array Rank2[]={2,1}.

[0017] Based on the same inventive concept, the present invention also provides a resolution enhancement control device for a liquid crystal device, comprising: an image decomposition module for acquiring a high-resolution image to be displayed and decomposing the high-resolution image into multiple low-resolution images; a judgment module for determining whether the current high-resolution image display cycle is a positive display cycle or a negative display cycle; a positive display module for controlling the display unit array to display the multiple low-resolution images in a preset first order during a positive display cycle, while simultaneously shifting the position of the multiple low-resolution images by controlling the direction of the galvanometer; a negative display module for controlling the display unit array to display the multiple low-resolution images in a preset second order during a negative display cycle, while simultaneously shifting the position of the multiple low-resolution images by controlling the direction of the galvanometer; and a looping module for repeatedly calling the image decomposition module to acquire new high-resolution images to enter the next high-resolution image display cycle.

[0018] Based on the same inventive concept, the present invention also provides a liquid crystal device, comprising: a display unit array, a galvanometer, and a control device; the display unit array is provided with a liquid crystal panel; the galvanometer is disposed in the optical path of the display unit array to refract the light beam emitted by the display unit array; the control device controls the image content displayed by the display unit array by controlling the transmittance of the liquid crystal panel, and controls the offset position of the image displayed by the display unit array by controlling the direction of the galvanometer; specifically, the control device controls the display unit array and the galvanometer by executing any of the above-described resolution enhancement control methods for liquid crystal devices.

[0019] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating the structure and principle of the display unit in an existing 3LCD projector;

[0021] Figure 2 This is a schematic diagram illustrating the structure and principle of the display unit of the liquid crystal device of the present invention;

[0022] Figure 3 This is a temporal variation diagram of the image content displayed by the display unit array in the existing resolution enhancement method based on galvanometer scanning;

[0023] Figure 4 This is a schematic diagram of the resolution enhancement control device for the liquid crystal device of the present invention;

[0024] Figure 5 This is a schematic flowchart of the resolution enhancement control method for a liquid crystal device according to the present invention;

[0025] Figure 6 This is a flowchart illustrating step S31 of the resolution enhancement control method for a liquid crystal device according to the present invention.

[0026] Figure 7 This is a flowchart illustrating step S32 of the resolution enhancement control method for the liquid crystal device of the present invention.

[0027] Figure 8 This is a time-series variation diagram of the image content displayed by the display unit array in one embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram showing the display order and offset position of the first to fourth low-resolution images in one embodiment of the present invention with N=4.

[0029] Figure 10 This is a schematic diagram showing the display order and offset position of the first low-resolution image and the second low-resolution image in one embodiment of the present invention with N=2. Detailed Implementation

[0030] It should be understood that the described embodiments are merely some, not all, of the embodiments described in this application. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort are within the scope of protection of this application.

[0031] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0032] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more, and "multiple frames" means two or more frames.

[0034] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.

[0035] While exploring the reasons why 3LCD projectors are prone to image retention and burn-in issues when using a galvanometer-based resolution enhancement method, the inventors carefully studied the principle behind image retention in liquid crystal devices and the technical means employed by existing liquid crystal devices to avoid it. They discovered that existing 3LCD projectors and other liquid crystal devices possess a frame-by-frame inversion mechanism for driving voltage to prevent image retention. However, the existing galvanometer-based resolution enhancement method did not consider compatibility with this mechanism, causing it to malfunction. Therefore, this invention optimizes the specific steps of the galvanometer-based resolution enhancement method by changing the display order of multiple low-resolution images to ensure compatibility with the existing frame-by-frame inversion mechanism, thereby solving the image retention and burn-in problems of 3LCD projectors and other liquid crystal devices.

[0036] To more clearly illustrate the purpose and technical details of the optimization methods of this invention, the following will analyze: (1) the principle of image retention in liquid crystal devices; (2) the frame-by-frame inversion mechanism of driving voltage used by existing liquid crystal devices to avoid image retention; and (3) the reason why existing resolution enhancement methods based on galvanometer scanning are incompatible with the frame-by-frame inversion mechanism of driving voltage. Based on the above (1)-(3), this invention proposes a resolution enhancement control method for liquid crystal devices that is compatible with the existing frame-by-frame inversion mechanism of driving voltage and has the effect of preventing liquid crystal image retention and screen burn-in. Since the resolution enhancement control method of liquid crystal devices of this invention is not limited to application in 3LCD projectors but can be extended to any liquid crystal device, the term "liquid crystal device" will be used uniformly below, and "3LCD projector" will not be specifically mentioned.

[0037] (1) The principle of image retention in LCD devices

[0038] When a driving voltage is applied to an LCD panel, positive and negative ions within the panel move to opposite sides. If a driving voltage of the same polarity is applied to the LCD panel for an extended period, a large number of positive and negative ions will accumulate on both sides. When the image needs to be refreshed, even if the polarity of the driving voltage changes, the accumulated positive and negative ions cannot move to the other side in time, and the transmittance of the liquid crystal cannot change accordingly. This results in the human eye being able to observe a residual image of the previous frame, leading to a poor user experience. In severe cases, the liquid crystal molecules may even react chemically with impurities due to charge accumulation, causing permanent damage to the LCD panel, commonly known as screen burn-in.

[0039] (2) Frame-by-frame inversion mechanism of driving voltage in liquid crystal devices

[0040] To avoid the aforementioned image ghosting and burn-in problems, existing LCD devices employ a frame-by-frame driving voltage reversal mechanism. This means that when displaying adjacent frames, the polarities of the driving voltages for the current and next frames are opposite. Let the current frame be A, with a + polarity driving voltage; and the next frame be A', with a - polarity driving voltage. Let +A be the amount of charge accumulated on both sides of the LCD panel during the display of the current frame. During the display of the next frame, the amount of charge accumulated on both sides decreases due to the reversed driving voltage polarity. This decrease is related to the content of the next frame and can be denoted as -A'. Therefore, the amount of charge accumulated on both sides of the LCD panel after displaying the current and next frames is +A - A'. Since the time interval between displaying the current frame A and the next frame A' is very short (e.g., only 4ms in a 240Hz LCD device), the content of the current frame A and the next frame A' is generally highly similar. Therefore, A≈A' can be considered, and the amount of charge +A - A'≈0. As can be seen, through this frame-by-frame reversal mechanism of driving voltage, the amount of charge accumulated on both sides of the liquid crystal panel reaches a dynamic balance with 0 as the baseline, and there will be no large accumulation of positive and negative charges on both sides of the liquid crystal panel, thus avoiding the aforementioned image ghosting and screen burn-in problems.

[0041] (3) The reason why existing resolution enhancement methods based on galvanometer scanning are incompatible with the frame-by-frame inversion mechanism of driving voltage.

[0042] The following section will first explain the specific situation when LCD devices adopt the existing resolution enhancement method based on galvanometer scanning, in order to analyze why the existing resolution enhancement method based on galvanometer scanning is incompatible with the frame-by-frame inversion mechanism of driving voltage.

[0043] Please see Figure 2 , Figure 2 This is a schematic diagram illustrating the structure and principle of the display unit in the liquid crystal device of the present invention. The liquid crystal device of the present invention, in... Figure 1 The display unit structure is supplemented with a galvanometer, comprising: a display unit array consisting of multiple display units A, a galvanometer B, and a control device C. Each display unit A in the display unit array has a liquid crystal panel A1. The galvanometer B is positioned in the optical path of the display unit array to refract the light beam emitted by the display unit array, causing a shift in the position of the image displayed by the display unit array. The control device C controls the content of the image displayed by the display unit array by controlling the light transmittance of the liquid crystal panel A1 of each display unit A, and controls the shift position of the image displayed by the display unit array by controlling the direction of the galvanometer B.

[0044] When the control device C controls the display unit array and the galvanometer using the existing resolution enhancement method based on galvanometer scanning, it specifically performs the following steps:

[0045] S00: Acquire a high-resolution image frame to be displayed, and decompose the high-resolution image into N low-resolution images using a preset image decomposition algorithm.

[0046] S01, let i = 1.

[0047] S02, during the i-th low-resolution image display cycle, the display unit array is controlled to display the i-th low-resolution image, and the galvanometer is controlled to adjust the offset position of the i-th low-resolution image to the i-th offset position.

[0048] S03, determine if i is equal to N.

[0049] S04, if i≠N, then let i=i+1, and return to step S02 to display the next frame of low-resolution image.

[0050] S05, if i = N, then complete the display of the high-resolution image of the current frame and return to step S00 to display the next high-resolution image.

[0051] Since N frames of low-resolution images are superimposed and synthesized into a high-resolution image in the human eye, displaying N frames of low-resolution images is equivalent to displaying one frame of high-resolution image. Let's denote that N low-resolution image display cycles constitute one high-resolution image display cycle, and let the N low-resolution images be designated as the 1st low-resolution image, the 2nd low-resolution image, ..., the Nth low-resolution image. The temporal changes of the displayed content in the display unit array in existing resolution enhancement methods based on galvanometer scanning are as follows... Figure 3 As shown. In the first high-resolution image display cycle, the control device C controls the display unit array to sequentially display the first to Nth low-resolution images of the current high-resolution image display cycle, while simultaneously controlling the galvanometer to sequentially move towards the first to Nth offset positions. Upon entering the second high-resolution image display cycle, the control device C first controls the galvanometer to return from the Nth offset position to the first offset position, and then controls the display unit array to sequentially display the first to Nth low-resolution images of the current high-resolution image display cycle, while simultaneously controlling the galvanometer to correspondingly change from the first offset position to the second to Nth offset positions.

[0052] like Figure 3 As shown, let's denote the i-th low-resolution image of the j-th high-resolution image display period as P. jiTherefore, in the first two high-resolution image display cycles, the display order of the low-resolution images is as follows:

[0053] P 11 P 12 ... P 1N P 21 P 22 ... P 2N .

[0054] Let's assume that the first low-resolution image P is the first frame of the first high-resolution image display cycle. 11 The polarity of the corresponding driving voltage is +. When N is even, the polarities of the driving voltages corresponding to the above low-resolution images are as follows:

[0055] P 11 (+), P 12 (-), ..., P 1N (-), P 21 (+), P 22 (-), ..., P 2N (-).

[0056] After the first two high-resolution image display cycles, the amount of charge accumulated on the LCD panel is:

[0057] +P 11 -P 12 +……-P 1N

[0058] +P 21 -P 22 +……-P 2N .

[0059] Continue using P 11 and P 21 P 12 and P 22 ... P 1N and P 2N The assumption of high similarity holds that P 11 ≈P 21 P 12 ≈P 22 ... P 1N ≈P 2N Therefore, the amount of charge accumulated on the LCD panel is approximately equal to:

[0060] +2P 11 -2P 12 +……-2P 1N .

[0061] The approximate expression for the amount of charge above is +2P 11 -2P 12+……-2P 1N ≠0, indicating that when the number of frames N in a low-resolution image is even (in practice, N is usually set to an even number, such as 2 or 4), due to the high similarity of the images P... 11 and P 21 P 12 and P 22 ... P 1N and P 2N The driving voltages have the same polarity, and their effects on the amount of charge accumulated on both sides of the LCD panel can no longer be canceled out by the frame-by-frame reversal mechanism of the driving voltage. As a result, the amount of charge accumulated on the LCD panel increases over time, leading to image ghosting and screen burn-in problems.

[0062] (4) The resolution improvement method of the liquid crystal device of the present invention

[0063] This invention optimizes the resolution enhancement control method executed by the control device C, dividing two adjacent high-resolution image display cycles into a positive display cycle and a negative display cycle. This results in the driving voltage polarities corresponding to a pair of highly similar low-resolution images displayed in the positive and negative display cycles being opposite, ensuring that the frame-by-frame reversal mechanism of the driving voltage still works. This solves the problem of incompatibility between existing resolution enhancement methods based on galvanometer scanning and the frame-by-frame reversal mechanism of the driving voltage.

[0064] Please see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the resolution enhancement control device for the liquid crystal device of the present invention. Figure 5 This is a schematic flowchart of the resolution enhancement control method for a liquid crystal device according to the present invention. The control device C of the present invention includes: an image decomposition module M1, a judgment module M2, a positive display module M31, a negative display module M32, and a loop module M4.

[0065] The image decomposition module M1 is used to perform step S1: acquire the high-resolution image to be displayed, and decompose the high-resolution image into N frames of low-resolution images through a preset image decomposition algorithm.

[0066] The judgment module M2 is used to execute step S2: determining whether the current high-resolution image display cycle is a positive or negative display cycle. Preferably, if the previous high-resolution image display cycle was a positive display cycle, then the current high-resolution image display cycle is a negative display cycle; if the previous high-resolution image display cycle was a negative display cycle, then the current high-resolution image display cycle is a positive display cycle.

[0067] The positive display module M31 is used to perform step S31: during the positive display cycle, it controls the display unit array to display N frames of low-resolution images in a preset first order, and at the same time controls the direction of the galvanometer to shift the position of multiple frames of low-resolution images.

[0068] Specifically, the first order is represented by the first order array Rank1[] = {1,2,...,N}. Step S31, which describes displaying N frames of low-resolution images in a time-division manner according to the preset first order, specifically involves displaying the Rank1[1] low-resolution image, the Rank1[2] low-resolution image, ..., the Rank1[N] low-resolution image in a time-division manner according to the display order of the first order array Rank1[]. Wherein Rank1[i] represents the i-th element in the first order array Rank1[], and i is any integer in the closed interval [1,N].

[0069] Please see Figure 6 , Figure 6 This is a flowchart illustrating step S31 of the resolution enhancement control method for the liquid crystal device of the present invention. Since each element in the first sequential array Rank1[] = {1,2,...,N} has been determined, substituting Rank1[1] = 1, Rank1[2] = 2, ..., Rank1[N] = N, and dividing the current high-resolution image display cycle into N low-resolution image display cycles, step S31 specifically includes:

[0070] S310, let i = 1;

[0071] S311, during the i-th low-resolution image display cycle, control the display unit array to display the i-th low-resolution image, and at the same time control the galvanometer to adjust the offset position of the i-th low-resolution image to the i-th offset position.

[0072] S312, determine if i is equal to N;

[0073] S313, if i≠N, then let i=i+1, and return to step S311 to display the next frame of low-resolution image;

[0074] If i = N, then complete the display of the current high-resolution image and proceed to step S4.

[0075] The negative display module M32 is used to perform step S32: during the negative display cycle, it controls the display unit array to display the N frames of low-resolution images in a time-division manner according to a preset second order, and at the same time controls the direction of the galvanometer to shift the position of multiple frames of low-resolution images.

[0076] Specifically, the second order is represented by the second order array Rank2[]. The second order array Rank2[] is: the inversion array Rank21[] = {N, N-1, ..., 1} or the transformation array Rank22[] = Transform(Rank21); where Transform(Rank21) represents the transformation array formed by swapping any pair of elements in the inversion array Rank21[] that are both in odd or even positions once or more.

[0077] For example, suppose the reversed array Rank21[] = {4, 3, 2, 1}. If we swap the positions of a pair of elements at odd positions (e.g., the first element "4" and the third element "2"), we get the first transformed array Rank22[] = {2, 3, 4, 1}. If we swap the positions of a pair of elements at even positions (e.g., the second element "3" and the fourth element "1"), we get the second transformed array Rank22[] = {4, 1, 2, 3}. The number of swaps can be one or more. For example, we can first swap the positions of the first and third elements, then swap the positions of the second and fourth elements, thus obtaining the third transformed array Rank22[] = {2, 1, 4, 3}. In the Transform(Rank21) transformation, the element pairs that are swapped must meet the following conditions: both elements in the pair must have either an odd position in the original position of the reverse array, or both elements must have an even position in the original position of the reverse array; any transformation array Rank22[] that meets this condition can be used as a possible choice for the second order array Rank2[].

[0078] Based on the second sequential array Rank2[], step S32, which describes displaying N frames of low-resolution images in a time-sharing manner according to a preset second order, specifically involves: displaying the Rank2[1] low-resolution image, the Rank2[2] low-resolution image, ..., the Rank2[N] low-resolution image in a time-sharing manner according to the display order of the second sequential array Rank2[]; where Rank2[i] represents the i-th element in the second sequential array Rank2[], and i is any integer within the closed interval [1, N]. Please refer to... Figure 7 , Figure 7 This is a flowchart illustrating step S32 of the resolution enhancement control method for the liquid crystal device of the present invention. Step S32 specifically includes:

[0079] S320, let i = 1;

[0080] S321, during the i-th low-resolution image display cycle, the display unit array is controlled to display the Rank2[i] low-resolution image, and the galvanometer is controlled to adjust the offset position of the Rank2[i] low-resolution image to the Rank2[i] offset position.

[0081] S322, determine if i is equal to N;

[0082] S323, if i≠N, then let i=i+1, and return to step S321 to display the next frame of low-resolution image;

[0083] If i = N, then complete the display of the current high-resolution image and proceed to step S4.

[0084] The loop module M4 is used to execute step S4: call the image decomposition module M1, return to step S1 to obtain a new frame of high-resolution image, so as to enter the next high-resolution image display cycle.

[0085] Please see Figure 8 , Figure 8 This is a time-series diagram showing the image content displayed by the display unit array in one embodiment of the present invention. Figure 8 In the illustrated embodiment, the first high-resolution image display cycle is a positive display cycle, the second high-resolution image display cycle is a negative display cycle, and the second sequential array Rank2[] is a reverse array Rank21[] = {N, N-1, ..., 1}. During the first high-resolution image display cycle, the control device C controls the display unit array to sequentially display the first low-resolution image to the Nth low-resolution image through step S31. After the first high-resolution image display cycle ends, the second high-resolution image display cycle switches to a negative display cycle, and the control device C controls the display unit array to sequentially display the Nth frame of low-resolution images to the first frame of low-resolution images through step S32. After the negative display cycle ends, the next high-resolution image display cycle switches back to a positive display cycle, and so on, ensuring that the polarity of the driving voltage corresponding to each pair of highly similar low-resolution images in adjacent positive and negative display cycles is necessarily opposite.

[0086] The following is based on Figure 8 Taking the first two high-resolution image display cycles in the illustrated embodiment as an example, this invention illustrates the principle that the polarity of the driving voltage corresponding to each pair of highly similar low-resolution images in adjacent positive and negative display cycles must be opposite:

[0087] like Figure 8 As shown, let P be the i-th low-resolution image in the j-th high-resolution image display period. jiTherefore, in the first high-resolution image display cycle (positive display cycle), the display order of low-resolution images is as follows:

[0088] P 11 P 12 ... P 1N .

[0089] In the second high-resolution image display cycle (negative display cycle), the display order of the low-resolution images is as follows:

[0090] P 2N ... P 22 P 21 .

[0091] Let P be the first low-resolution image in the first high-resolution image display cycle. 11 The polarity of the corresponding driving voltage is +. When N is even, the polarities of the driving voltages corresponding to the above low-resolution images are as follows:

[0092] P 11 (+), P 12 (-), ..., P 1N (-)

[0093] P 2N (+), ..., P 22 (+), P 21 (-).

[0094] After the first two high-resolution image display cycles, the amount of charge accumulated on the LCD panel is:

[0095] +P 11 -P 12 +……-P 1N

[0096] -P 21 +P 22 -……+P 2N .

[0097] Continue using P 11 and P 21 P 12 and P 22 ... P 1N and P 2N The assumption of high similarity holds that P 11 ≈P 21 P 12 ≈P 22 ... P 1N ≈P 2N Then +P 11 -P 21 -P 12 +P22 ... -P 1N +P 2N The charges cancel each other out, resulting in approximately zero charge accumulated on the LCD panel.

[0098] Furthermore, when N is odd, the polarities of the driving voltages corresponding to the aforementioned low-resolution images are as follows:

[0099] P 11 (+), P 12 (-), ..., P 1N (+)

[0100] P 2N (-), ..., P 22 (+), P 21 (-).

[0101] After the first two high-resolution image display cycles, the amount of charge accumulated on the LCD panel is:

[0102] +P 11 -P 12 +……+P 1N

[0103] -P 21 +P 22 -……-P 2N .

[0104] It can be seen that when N is odd, +P 11 -P 21 -P 12 +P 22 ... -P 1N +P 2N They can still cancel each other out, making the amount of charge accumulated on the LCD panel approximately equal to 0.

[0105] Based on the above analysis, it can be concluded that when the second sequential array Rank2[] is the reverse array Rank21[] = {N, N-1, ..., 1}, the last low-resolution image of the previous (j-th) high-resolution image display cycle and the first low-resolution image of the next (j+1) high-resolution image display cycle must be highly similar "P" frames. jN and P j+1,N "or "P j1 and P j+1,1 "In terms of display order, these two images belong to adjacent frames, so the corresponding driving voltages must also have opposite polarities. Regardless of whether N is odd or even, this invention can ensure that the driving voltages corresponding to a pair of highly similar low-resolution images in two adjacent high-resolution image display cycles are necessarily opposite."

[0106] Based on the above principles, it can be deduced that when the second sequential array Rank2[] is the transformation array Rank22[] = Transform(Rank21) formed by swapping any pair of elements in the reverse array Rank21[] that are at odd or even positions, since the driving voltage polarity corresponding to the pair of elements at odd or even positions must be the same, swapping the display order of this pair of elements will only result in the expression for the amount of charge accumulated on the LCD panel (referring to +P). 11 -P 12 +……-P 1N -P 21 +P 22 -……+P 2N The addends in the equation are swapped without affecting +P. 11 -P 21 -P 12 +P 22 ... -P 1N +P 2N The charges cancel each other out, and the amount of charge accumulated on the liquid crystal panel is approximately zero. Therefore, this invention does not limit the second sequential array Rank2[] to be the reverse array Rank21[] = {N, N-1, ..., 1}. Those skilled in the art can set the second sequential array to the reverse array Rank21[] = {N, N-1, ..., 1} or other transformation array Rank22[] = Transform(Rank21) as needed.

[0107] Based on the above principles, it can be inferred that in other embodiments, the first high-resolution image display cycle can also be a negative display cycle, as long as the negative and positive display cycles can alternate. This invention does not limit the first high-resolution image display cycle to either a positive or negative display cycle.

[0108] Based on the above principles, it can be deduced that switching between positive and negative display cycles after each high-resolution image display cycle (i.e., if the previous high-resolution image display cycle was positive, the current high-resolution image display cycle is negative; if the previous high-resolution image display cycle was negative, the current high-resolution image display cycle is positive) is the safest option to minimize the amount of charge accumulated on both sides of the liquid crystal panel. In other embodiments where safety requirements are not high, the arrangement of positive and negative display cycles only needs to satisfy the condition that "the number of positive and negative display cycles is equal within a preset time period that satisfies the high similarity of content in the high-resolution images." For example, the positive and negative display cycles can be switched every n high-resolution image display cycles (e.g., every n consecutive positive display cycles are followed by the same number of n consecutive negative display cycles), or even the n positive and n negative display cycles can be arranged discontinuously. As long as the content of the high-resolution image remains highly similar within the preset time period cycle, the amount of charge accumulation on both sides of the LCD panel caused by the same number of positive and negative display cycles can cancel each other out.

[0109] The following example, using a preset time period of 12 high-resolution image display cycles, illustrates three possible arrangements where the number of positive and negative display cycles are equal within this preset time period:

[0110] ① The 12 high-resolution image display cycles are: positive, negative, positive, negative, positive, negative, positive, negative, positive, negative, positive, negative, positive, negative. "Positive" represents a positive display cycle, and "negative" represents a negative display cycle. This configuration involves switching between positive and negative display cycles after each high-resolution image display cycle, representing the safest approach to minimize the amount of charge accumulated on both sides of the liquid crystal panel. The control device C can determine whether the current high-resolution image display cycle is positive or negative by judging whether the previous high-resolution image display cycle was positive or negative. For example, if the previous high-resolution image display cycle before the second high-resolution image display cycle is the first high-resolution image display cycle, which is a positive cycle, then the control device C can determine that the second high-resolution image display cycle is a negative cycle.

[0111] ② The 12 high-resolution image display cycles are: positive, positive, positive, negative, negative, negative, negative, positive, positive, positive, negative, negative, negative. "Positive" represents a positive display cycle, and "negative" represents a negative display cycle. This situation involves switching between positive and negative display cycles every n high-resolution image display cycles (preset constant n=3). In this case, the control device C can determine whether the current high-resolution image display cycle is positive or negative by judging whether the nth high-resolution image display cycle before it is a positive or negative cycle. For example, if the third high-resolution image display cycle before the fourth high-resolution image display cycle is the first high-resolution image display cycle, which is a positive cycle, then the control device C can determine that the fourth high-resolution image display cycle is a negative cycle.

[0112] ③ The 12 high-resolution image display cycles are: positive, positive, negative, positive, negative, negative, negative, negative, positive, negative, positive, positive. "Positive" represents a positive display cycle, and "negative" represents a negative display cycle. In this case, the positive and negative display cycles are not consecutive, but as long as the content of the 12 frames of high-resolution images within the preset time period remains highly similar, the charge accumulation caused by the equal number of positive and negative display cycles on both sides of the liquid crystal panel can still cancel each other out. At this time, the control device C can query a preset table to determine whether the current high-resolution image display cycle belongs to a negative or positive display cycle.

[0113] Further, please refer to Figure 9 , Figure 9 This is a schematic diagram of the display order and offset positions of the first to fourth low-resolution images in an embodiment of the present invention with N=4. In this embodiment, the four offset positions corresponding to the four low-resolution images form a square array; the first order array Rank1[] = {1,2,3,4}; the second order array Rank2[] = {4,3,2,1}, {2,3,4,1}, {4,1,2,3}, or {2,1,4,3}. In step S31, during the positive display cycle, the display unit array is controlled to display the first, second, third, and fourth low-resolution images in a time-division manner, while the direction of the galvanometer is controlled so that the offset positions move along the first, second, third, and fourth offset positions, as shown in the diagram. Figure 9 As shown in the image above.

[0114] During the negative display cycle, the display order and offset position vary depending on the specific content of the second sequential array Rank2[]. Figure 9 The following diagram shows four scenarios:

[0115] (1) When the second sequential array Rank2[] is the reverse array {4,3,2,1}, step S32 controls the display unit array to display the 4th low-resolution image, the 3rd low-resolution image, the 2nd low-resolution image, and the 1st low-resolution image in a time-division manner, while controlling the direction of the galvanometer so that the offset position moves along the 4th offset position, the 3rd offset position, the 2nd offset position, and the 1st offset position. The display order and offset position are as follows: Figure 9 The following figure is shown in Figure (1).

[0116] (2) When the second sequence array Rank2[] is the first transformation array {2,3,4,1}, step S32 controls the display unit array to display the second low-resolution image, the third low-resolution image, the fourth low-resolution image, and the first low-resolution image in a time-division manner, while controlling the direction of the galvanometer so that the offset position moves along the second offset position, the third offset position, the fourth offset position, and the first offset position. The display order and offset position are as follows: Figure 9 The following figure is shown in Figure (2).

[0117] (3) When the second sequence array Rank2[] is the second transformation array {4,1,2,3}, step S32 controls the display unit array to display the 4th low-resolution image, the 1st low-resolution image, the 2nd low-resolution image, and the 3rd low-resolution image in a time-division manner, while controlling the direction of the galvanometer so that the offset position moves along the 4th offset position, the 1st offset position, the 2nd offset position, and the 3rd offset position. The display order and offset position are as follows: Figure 9 The following figure is shown in Figure (3).

[0118] (4) When the second sequence array Rank2[] is the third transformation array {2,1,4,3}, step S32 controls the display unit array to display the second low-resolution image, the first low-resolution image, the fourth low-resolution image, and the third low-resolution image in a time-division manner, while controlling the direction of the galvanometer so that the offset position moves along the second offset position, the first offset position, the fourth offset position, and the third offset position. The display order and offset position are as follows: Figure 9 The following figure is shown in Figure (4).

[0119] In the above embodiment where N=4, if the native resolution of the liquid crystal device is 1080p, then the resolution of the low-resolution image is 1080p, and the resolution of the high-resolution image is 4K, thus enabling the liquid crystal device with a native resolution of 1080p to break through hardware limitations and display 4K images.

[0120] Further, please refer to Figure 10 , Figure 10This is a schematic diagram illustrating the display order and offset positions of the first low-resolution image and the second low-resolution image in an N=2 embodiment of the present invention. In this embodiment, the two offset positions corresponding to the two low-resolution images are arranged along a diagonal direction. The diagonal direction can be from the upper left corner to the lower right corner, or from the upper right corner to the lower left corner. The first order array Rank1[] = {1,2}; the second order array Rank2[] = {2,1}. In step S31, during the positive display cycle, the display unit array is controlled to display the first low-resolution image and the second low-resolution image in a time-division manner, while the direction of the galvanometer is controlled so that the offset position moves from the first offset position to the second offset position. In step S32, during the negative display cycle, the display unit array is controlled to display the second low-resolution image and the first low-resolution image in a time-division manner, while the direction of the galvanometer is controlled so that the offset position moves from the second offset position to the first offset position.

[0121] In the above N=2 embodiment, if the native resolution of the liquid crystal device is 1080p, then the resolution of the low-resolution image is 1080p, and the resolution of the high-resolution image is 2K, thus enabling the liquid crystal device with a native resolution of 1080p to break through hardware limitations and display 2K images.

[0122] This invention offers the following technical advantages: By using a galvanometer to time-shift the display of images, multiple low-resolution images are superimposed on each other to create a high-resolution image in the human eye. This allows LCD devices to overcome the limitations of their native hardware resolution and display high-resolution images, meeting users' demands for high-resolution display. Furthermore, this invention addresses the compatibility issue between the resolution enhancement method and the frame-by-frame inversion mechanism of the LCD device's driving voltage. By changing the display order of multiple low-resolution images, it solves the problems of image retention and burn-in that easily occur when LCD devices increase resolution, balancing high resolution and safety, improving user experience, and extending the lifespan of the LCD device.

[0123] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A method for controlling resolution enhancement in a liquid crystal display (LCD) device, characterized in that, Including the following steps: S1, acquire the high-resolution image to be displayed, and decompose the high-resolution image to obtain multiple frames of low-resolution images; S2, determine whether the current high-resolution image display cycle is a positive or negative display cycle; S31, During the positive display cycle, the display unit array is controlled to display the multiple frames of low-resolution images in a preset first order, while the position of the multiple frames of low-resolution images is shifted by controlling the direction of the galvanometer. S32, During the negative display cycle, the display unit array is controlled to display the multiple frames of low-resolution images in a preset second order, while the position of the multiple frames of low-resolution images is shifted by controlling the direction of the galvanometer. S4, return to step S1 to obtain a new high-resolution image in order to enter the next high-resolution image display cycle.

2. The resolution enhancement control method for a liquid crystal device according to claim 1, characterized in that: The arrangement of the positive and negative display cycles satisfies the following condition: the number of positive and negative display cycles is equal within a preset time period.

3. The resolution enhancement control method for a liquid crystal device according to claim 2, characterized in that: Step S2 is as follows: if the nth high-resolution image display cycle is a positive display cycle, then the current high-resolution image display cycle is a negative display cycle; if the nth high-resolution image display cycle is a negative display cycle, then the current high-resolution image display cycle is a positive display cycle; n is a preset constant.

4. The resolution enhancement control method for a liquid crystal device according to claim 3, characterized in that: The preset constant n = 1; Step S2 is as follows: if the previous high-resolution image display cycle is a positive display cycle, then the current high-resolution image display cycle is a negative display cycle; if the previous high-resolution image display cycle is a negative display cycle, then the current high-resolution image display cycle is a positive display cycle.

5. The resolution enhancement control method for a liquid crystal device according to any one of claims 1-4, characterized in that: Let N be the number of low-resolution images in the multiple frames, and let N low-resolution images be the 1st low-resolution image, the 2nd low-resolution image, ..., the Nth low-resolution image; The first order mentioned in step S31 is represented by the first order array Rank1[] = {1,2,...,N}; Step S31, which involves displaying the multiple low-resolution images in a preset first order in a time-division manner, specifically includes: According to the order displayed in the first sequential array Rank1[], the low-resolution images of Rank1[1], Rank1[2], ..., Rank1[N] are displayed in time-sharing order; where Rank1[i] represents the i-th element in the first sequential array Rank1[], and i is any integer in the closed interval [1, N].

6. The resolution enhancement control method for a liquid crystal device according to claim 5, characterized in that: The second order described in step S32 is represented by the second order array Rank2[]. The second sequential array Rank2[] is specifically: the reverse array Rank21[] = {N, N-1, ..., 1} or the transformation array Rank22[] = Transform(Rank21); where Transform(Rank21) represents the transformation array formed by swapping any pair of elements in the reverse array Rank21[] that are both in odd or even positions; Then, step S32, which involves displaying the multiple low-resolution images in a preset second order in a time-division manner, specifically includes: According to the order displayed in the second sequential array Rank2[], the low-resolution images of Rank2[1], Rank2[2], ..., Rank2[N] are displayed in time-sharing order; where Rank2[i] represents the i-th element in the second sequential array Rank2[], and i is any integer in the closed interval [1, N].

7. The resolution enhancement control method for a liquid crystal device according to claim 6, characterized in that: The number of low-resolution images in multiple frames is N = 4; The first sequential array Rank1[] = {1,2,3,4}; The second sequential array Rank2[] = {4,3,2,1}, {2,3,4,1}, {4,1,2,3} or {2,1,4,3}.

8. The resolution enhancement control method for a liquid crystal device according to claim 6, characterized in that: The number of low-resolution images in multiple frames is N = 2; The first sequential array Rank1[] = {1, 2}; The second sequential array Rank2[] = {2, 1}.

9. A resolution enhancement control device for a liquid crystal display (LCD) device, characterized in that, include: An image decomposition module is used to acquire a high-resolution image to be displayed and decompose the high-resolution image to obtain multiple frames of low-resolution images. The judgment module is used to determine whether the current high-resolution image display cycle is a positive or negative display cycle. The positive display module is used to control the display unit array to display the multiple frames of low-resolution images in a preset first order during the positive display cycle, and at the same time, to shift the position of the multiple frames of low-resolution images by controlling the direction of the galvanometer. The negative display module is used to control the display unit array to display the multiple frames of low-resolution images in a preset second order during the negative display cycle, and at the same time, to shift the position of the multiple frames of low-resolution images by controlling the direction of the galvanometer. The loop module is used to repeatedly call the image decomposition module to obtain new high-resolution images in order to enter the next high-resolution image display cycle.

10. A liquid crystal device, characterized in that, include: Display unit array, galvanometer, and control device; The display unit array is equipped with a liquid crystal panel; the galvanometer is disposed in the optical path of the display unit array to refract the light beam emitted by the display unit array; The control device controls the content of the image displayed by the display unit array by controlling the light transmittance of the liquid crystal panel, and controls the offset position of the image displayed by the display unit array by controlling the direction of the galvanometer. The control device specifically controls the display unit array and the galvanometer by executing the resolution enhancement control method of the liquid crystal device according to any one of claims 1-8.

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