Display driving method, display driving chip and liquid crystal display device

Abstract

This application discloses a display driving method, a display driving chip, and a liquid crystal display device. The display driving method includes: obtaining first-plane data, second-plane data, and a loading duration of the second-plane data, wherein the second-plane data is adjacent to the first-plane data; controlling a display device to display the first-plane data and load the second-plane data within the display duration of the first-plane data; and, when the loading duration of the second-plane data is greater than the display duration of the first-plane data, controlling the display device to turn off the corresponding light source after the first-plane data is displayed and continue loading the second-plane data until the loading of the second-plane data is completed. Based on the above method, the cost of data driving can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display driving method, a display driving chip, and a liquid crystal display device. Background Art

[0002] In the prior art, when controlling an LCD device to display an image based on data to be displayed, the data to be displayed can be divided into multiple bit planes according to color gradation, and each bit plane is then loaded and displayed one by one. When displaying multiple bit planes, different bit planes are typically allocated different display times. Therefore, if the display duration of a bit plane is shorter than the loading duration of the next bit plane, it is impossible to load the next bit plane while displaying the current bit plane.

[0003] In order to ensure that each bit plane data of a plurality of bit plane data can load the next bit plane data when being displayed, the liquid crystal display device has a higher requirement on the data loading rate, and the cost of the data transmission device used is higher. Summary of the Invention

[0004] The main technical problem solved by this application is how to reduce the cost of data-driven.

[0005] In order to solve the above-mentioned technical problems, the first technical solution adopted in the present application is: providing a display driving method, applied to a liquid crystal display device, the display driving method comprising: controlling the liquid crystal display device to display the first bit plane data within the display duration of the first bit plane data; when the loading duration of a single bit plane data is greater than the display duration of the first bit plane data, after the first bit plane data is displayed, controlling the liquid crystal display device to turn off its corresponding light source, and completing the loading of the second bit plane data during the process of turning off the light source after the first bit plane data is displayed, wherein the first bit plane data and the second bit plane data are displayed adjacent to each other in sequence.

[0006] In order to solve the above technical problems, the second technical solution adopted in this application is: to provide a display driver chip, which can execute the above display driving method when driving a liquid crystal display device to display images.

[0007] In order to solve the above technical problems, the third technical solution adopted in the present application is: to provide a liquid crystal display device, which can execute the above display driving method when displaying images.

[0008] The beneficial effect of the present application is that, different from the prior art, the technical solution of the present application can turn off the light source of the liquid crystal display device after controlling it to display the first plane data when the loading time of a single bit plane data is longer than the display time of the first bit plane data, and load the second bit plane data displayed adjacent to the first bit plane data during the process of turning off the light source after the display of the first bit plane data is completed, so that the liquid crystal display device can obtain sufficient time to load the second bit plane data before displaying the second bit plane data, thereby avoiding the situation where the loading speed of the liquid crystal display device must be increased to ensure that the loading of the second bit plane data can be completed when the first bit plane data is displayed. Based on the above method, the loading of the second bit plane data can be completed in time under a low loading speed, thereby reducing the cost of data driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 is a flow chart of a first embodiment of the display driving method of the present application;

[0011] Figure 2 This is a functional module diagram of an embodiment of the display driver chip of the present application;

[0012] Figure 3 is a flow chart of a second embodiment of the display driving method of the present application;

[0013] Figure 4 This is a schematic diagram of the relevant duration of an embodiment of the bit plane data of the present application;

[0014] Figure 5 This is a schematic diagram of the relevant duration of another embodiment of the bit plane data of the present application;

[0015] Figure 6 FIG. 1 is a schematic diagram of an embodiment of a liquid crystal display device of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0017] The terms "first" and "second" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0018] The liquid crystal display device to which the display driving method of the present application is applied may be an LCOS liquid crystal display device. For a digitally modulated LCOS liquid crystal display device, the deflection angle of the liquid crystal molecules can be controlled by applying a PWM voltage signal to the liquid crystal pixels, thereby controlling the light transmittance of the liquid crystal pixels. Compared to analog-modulated LCOS liquid crystal display devices, digital-modulated LCOS liquid crystal display devices control the flipping of liquid crystal molecules only by adjusting the duty cycle of two voltages. The modulation accuracy is controlled by dividing the time. The higher the modulation rate, the higher the control accuracy of the liquid crystal molecules.

[0019] A digital modulation method used by digital modulation LCOS liquid crystal display devices is to divide a frame modulation cycle into time according to binary weights. Each independent time period corresponds to a bit plane of data. For binary grayscale data, each bit of data corresponds to a bit plane. For example, an 8-bit binary grayscale data, the corresponding grayscale value is 00000000~11111111 (binary), which can be divided into 8 bit planes and the corresponding 8 bit plane data, corresponding to 2 7 , 2 6 , 2 5 , 2 4 , 2 3 , 2 2 , 2 1 , 2 0 During the modulation display period, only one bit plane of data can be written into the pixel storage unit corresponding to the pixel at a time. While one bit plane of data is being displayed, the next bit plane of data to be displayed must be written into the pixel storage unit corresponding to the pixel. Therefore, the shorter the display time of a bit plane, the higher the write rate required for the data of the next bit plane. The higher the required write rate, the higher the cost of the data transmission devices used, and it also affects the chip area occupied by the circuit devices.

[0020] This application first proposes a display driving method, which is applied to a liquid crystal display device, such as Figure 1As shown, Figure 1 1 is a flow chart of a first embodiment of a display driving method of the present application, the display driving method comprising:

[0021] Step S11: controlling the liquid crystal display device to display the first bit of plane data within the display duration of the first bit of plane data.

[0022] In the data driving process, the liquid crystal display device can be controlled to control each pixel to display based on the first plane data within the display duration corresponding to the first plane data. In one or more embodiments of the present application, the liquid crystal display device can be specifically an LCOS liquid crystal display device.

[0023] Step S12: When the loading time of a single bit plane data is longer than the display time of the first bit plane data, after the first bit plane data is displayed, the liquid crystal display device is controlled to turn off its corresponding light source, and the loading of the second bit plane data is completed during the process of turning off the light source after the first bit plane data is displayed.

[0024] Among them, the first bit plane data and the second bit plane data are displayed adjacent to each other in sequence, that is, the first bit plane data and the second bit plane data are two bit plane data that need to be displayed adjacent to each other in sequence among the multiple bit plane data corresponding to a frame of image to be displayed by the liquid crystal display device. After the liquid crystal display device displays based on the first bit plane data, the next bit plane data to be displayed is the second bit plane data.

[0025] When it is determined that the loading time of a single bit plane data is longer than the display time of the first bit plane data, that is, when it is determined that the loading time of the second bit plane data is longer than the display time of the first bit plane data, it can be determined that during the process of the liquid crystal display device performing a corresponding display based on the first bit plane data, the display time is insufficient for the liquid crystal display device to completely load the second bit plane data. Therefore, after the display process corresponding to the first bit plane data is completed, the liquid crystal display device can be controlled to turn off its light source. When the light source is turned off, the loading of the second bit plane data is completed, so that the liquid crystal display device can subsequently smoothly perform the corresponding display based on the second bit plane data.

[0026] It is understandable that, for a conventional liquid crystal display device, controlling the liquid crystal display device to turn off its light source means turning off the backlight light source. For an LCOS display device, controlling the display device to turn off its light source means turning off its incident light source.

[0027] Based on the above-mentioned method of turning off the light source to extend the total time for data loading corresponding to the second plane data, it is possible to avoid the need to increase the data transmission rate to ensure that the loading of the second plane data can be completed during the display process corresponding to the first plane data, thereby reducing the data transmission rate requirements for data driving and thereby reducing the cost of data driving.

[0028] Different from the existing technology, the technical solution of the present application can turn off the light source of the liquid crystal display device after controlling it to display the first plane data when the loading time of a single bit plane data is longer than the display time of the first bit plane data, and load the second bit plane data displayed adjacent to the first bit plane data during the process of turning off the light source after the display of the first bit plane data is completed, so that the liquid crystal display device can obtain sufficient time to load the second bit plane data before displaying the second bit plane data, thereby avoiding the situation where the loading speed of the liquid crystal display device must be increased to ensure that the loading of the second bit plane data can be completed when the first bit plane data is displayed. Based on the above method, the loading of the second bit plane data can be completed in time under a low loading speed, thereby reducing the cost of data driving.

[0029] For example, Figure 2 As shown, Figure 2 This is a schematic diagram of the functional modules of an embodiment of the display driver chip of the present application. The above-mentioned display driver chip may include: a logic module, a bit plane data conversion module, a data sending module, a register module 1, a register module 2, a data receiving module, a pixel array module and a display module.

[0030] The logic module can split the received RGB image data into monochrome image data corresponding to red, green and blue respectively. The bit plane data conversion module can convert a monochrome image data into a plurality of bit plane data. The data sending module is used to send the bit plane image data to the storage module 1 or the storage module 2. The data receiving module is used to receive the bit plane image data from the storage module 2 or the storage module 1. When the storage module 1 sends data to the data receiving module, the data sending module can send data to the storage module 2, and so on. The efficiency of data transmission can be effectively improved based on this method of transmitting data in turn. The pixel array module is used to sequentially load the bit plane data received from the data receiving module and control the display module to display the corresponding bit plane data based on the received bit plane data.

[0031] The display driving chip can drive the liquid crystal display device to display images, and can execute the steps of the above-mentioned display driving method when driving the liquid crystal display device to display images.

[0032] This application also proposes a display driving method, which is applied to a liquid crystal display device, such as Figure 3 As shown, Figure 3FIG. 2 is a flow chart of a second embodiment of a display driving method of the present application, wherein the display driving method includes:

[0033] Step S21: controlling the liquid crystal display device to display the first bit of plane data within the display duration of the first bit of plane data.

[0034] Step S22: When the loading time of a single bit plane data is longer than the display time of the first bit plane data, after the first bit plane data is displayed, the liquid crystal display device is controlled to turn off its corresponding light source, and the loading of the second bit plane data is completed during the process of turning off the light source after the first bit plane data is displayed.

[0035] Steps S21-S22 in the second embodiment are the same as steps S11-S12 in the first embodiment, and are not described again here.

[0036] Alternatively, as Figure 3 As shown, the display driving method further includes:

[0037] Step S23: When the loading duration of a single bit-plane data is less than or equal to the display duration of the first bit-plane data, the loading of the second bit-plane data is completed during the display process of the first bit-plane data.

[0038] Specifically, after step S21 is completed, different steps can be performed subsequently depending on the situation. If the loading time of a single bit plane data is greater than the display time of the first bit plane data, step S22 is performed; if the loading time of a single bit plane data is less than or equal to the display time of the first bit plane data, step S23 is performed.

[0039] When the loading time of a single bit plane data is less than or equal to the display time of the first bit plane data, there is sufficient time to load the second bit plane data during the display process of the first bit plane data. Therefore, at this time, the loading of the second bit plane data can be completed while controlling the liquid crystal display device to display the first bit plane data, and after the first bit plane data is displayed, the liquid crystal display device can be controlled to display the second bit plane data.

[0040] Based on the above approach, when conditions permit, the loading of the second bit plane data can be completed without turning off the light source corresponding to the liquid crystal display device, thereby improving the efficiency of data driving.

[0041] Optionally, in step S22, after the first bit plane data is displayed, controlling the liquid crystal display device to turn off its corresponding light source, and completing the loading of the second bit plane data during the process of turning off the light source after the first bit plane data is displayed, includes:

[0042] The second bit plane data is loaded during the display process of the first bit plane data, and the second bit plane data is continuously loaded during the process of turning off the light source after the display of the first bit plane data is completed, until the loading of the second bit plane data is completed.

[0043] Among them, when it is determined that the loading time of a single bit plane data is longer than the display time of the first bit plane data, it can be determined that in the process of making the liquid crystal display device perform corresponding display based on the first bit plane data, the time is not enough for the liquid crystal display device to load the second bit plane data. Therefore, at this time, after the display process corresponding to the first bit plane data is completed, the liquid crystal display device can be controlled to turn off the light source thereon and turn off the light source, so that the liquid crystal display device can obtain sufficient time to complete the loading of the second bit plane data, so that the liquid crystal display device can smoothly perform corresponding display based on the second bit plane data.

[0044] Specifically, the second bit plane data may be loaded when the first bit plane data is displayed, and the second bit plane data may continue to be loaded while the light source is turned off after the first bit plane data is displayed, until the loading of the second bit plane data is completed.

[0045] Based on the above method, the loading of the second-bit plane data can be completed as quickly as possible, and the duration of the light source shutoff process corresponding to the first-bit plane data can be shortened as much as possible, thereby reducing the negative impact of the light source shutoff process on the display effect of the liquid crystal display device and improving the user experience of the liquid crystal display device.

[0046] In an application scenario, take the case where 4 bit planes of data need to be loaded and displayed as an example, Figure 4 (A) is a schematic diagram showing the display durations of four bit plane data (bit plane data 3 - 0 ), where the display durations corresponding to the bit plane data 3 - 0 are halved one by one.

[0047] like Figure 4 (B) shows a schematic diagram of the loading time required to load any bit plane data in the bit plane data 3-0, which is also a schematic diagram of the loading time of the single bit plane data mentioned above. The loading time is less than the display time of the bit plane data 3 or 2, but greater than the display time of the bit plane data 1.

[0048] like Figure 4(C) is a schematic diagram showing a method of adding a light source shutoff process after the display process of the corresponding bit plane data through the above-mentioned method of "loading the second bit plane data during the display process of the first bit plane data, and continuing to load the second bit plane data during the light source shutoff process after the display of the first bit plane data is completed, until the loading of the second bit plane data is completed". The entire process of displaying the bit plane data 3-0 is divided into multiple process segments, showing the display process 3' of bit plane data 3, the display process 2' of bit plane data 2, the display process 1' of bit plane data 1, the light source shutoff process 11 after the display process of bit plane data 1, and the display process 0' of bit plane data 0.

[0049] In some embodiments of the present application, Figure 4 As shown in (C), the display duration ratio of each plane is as follows:

[0050] T3 (display process 3' of bit plane data 3): T2 (display process 2' of bit plane data 2): T1 (display process 1' of bit plane data 1): T0 (display process 0' of bit plane data 0) = 8:4:2:1.

[0051] The total duration of the display process 1 ′ of the bit plane data 1 and the light source shut-off process 11 is greater than or equal to the loading duration of a single bit plane data.

[0052] During the display process based on the bit plane data 3, the loading of the bit plane data 2 can be completed within the display duration of the bit plane data 3, and after the display of the bit plane data 3 is completed, the display based on the bit plane data 2 is started.

[0053] During the display process based on bit plane data 2, the loading of bit plane data 1 can be completed within the display duration of bit plane data 2, and after the display of bit plane data 2 is completed, the display based on bit plane data 1 is started.

[0054] During the display process based on bit plane data 1, bit plane data 0 can be loaded within the display duration of bit plane data 1, and bit plane data 0 can continue to be loaded within the duration of turning off the light source after the display of bit plane data 1 is completed until the loading is completed, after which display based on bit plane data 0 can be started.

[0055] For example, in a specific case, Figure 4 As shown in (C), under this time axis, in the display process 3' of the bit plane data 3, the bit plane data 2 is loaded at the same time, and the display process 2' of the bit plane data 2 is shown before Figure 4 (B) The same texture-filled rectangle represents the loading process of bit plane data 2.

[0056] In the display process 2' of the bit plane data 2, the bit plane data 1 is loaded at the same time. The display process 1' of the bit plane data 1 is the same as that shown before. Figure 4 (B) The same texture-filled rectangle represents the loading process of bit plane data 1.

[0057] In the display process 1' of the bit plane data 1 and the light source closing process 11, the bit plane data 0 is loaded at the same time. The display process 0' of the bit plane data 0 is shown as Figure 4 (B) The same texture-filled rectangle represents the loading process of bit plane data 0, and the process after the loading process of bit plane data 0 is the display process 0′ of bit plane data 0.

[0058] Based on the above method, by adding a light source shutting down process for the bit plane data whose corresponding display duration is shorter than the loading duration of a single bit plane data, and by making the sum of the display duration of the bit plane data and the duration of the light source shutting down process greater than or equal to the loading duration of a single bit plane data, sufficient time is obtained to load the next bit plane data of the bit plane data during the process of displaying the bit plane data and shutting down the light source.

[0059] Optionally, after the first bit plane data is displayed, step S22 controls the display device liquid crystal display device to turn off its corresponding light source, and completes the loading of the second bit plane data during the process of turning off the light source after the first bit plane data is displayed, specifically including:

[0060] The second bit plane data is loaded during the process of turning off the light source until the loading of the second bit plane data is completed.

[0061] Among them, when it is determined that the loading time of a single bit plane data is longer than the display time of the first bit plane data, it can be determined that in the process of making the liquid crystal display device perform corresponding display based on the first bit plane data, the time is not enough for the liquid crystal display device to load the second bit plane data. Therefore, at this time, after the display process corresponding to the first bit plane data is completed, the liquid crystal display device can be controlled to turn off the light source thereon and turn off the light source, so that the liquid crystal display device can obtain sufficient time to complete the loading of the second bit plane data, so that the liquid crystal display device can smoothly perform corresponding display based on the second bit plane data.

[0062] Specifically, the second plane data may be loaded only after the first plane data is displayed. That is, the second plane data may be loaded from zero until the loading is completed during the light source off process after the first plane data is displayed.

[0063] Based on the above method, the display process of the liquid crystal display device can be prevented from being affected due to data loading occupying relevant resources of the liquid crystal display device, thereby avoiding display abnormalities of the liquid crystal display device and improving the reliability of the liquid crystal display device.

[0064] In an application scenario, take the case where 4 bit planes of data need to be loaded and displayed as an example, Figure 4 (A) is a schematic diagram showing the display durations of four bit plane data (bit plane data 3 - 0 ), where the display durations corresponding to the bit plane data 3 - 0 are halved one by one.

[0065] like Figure 4 (B) is a schematic diagram showing the loading time required to load any one of the bit plane data 3-0. The loading time is shorter than the display time of the bit plane data 3 or 2 and longer than the display time of the bit plane data 1.

[0066] like Figure 4 (D) is a schematic diagram showing a process of turning off the light source added after the display process of the corresponding bit plane data through the above-mentioned method of "loading the second bit plane data during the process of turning off the light source until the loading of the second bit plane data is completed", wherein the entire process of displaying the bit plane data 3-0 is divided into multiple process segments, showing the display process 3' of bit plane data 3, the display process 2' of bit plane data 2, the display process 1' of bit plane data 1, the light source turning off process 12 after the display process of bit plane data 1, and the display process 0' of bit plane data 0.

[0067] like Figure 4 As shown in (D), the duration ratio of each process is as follows:

[0068] T3 (display process 3' of bit plane data 3): T2 (display process 2' of bit plane data 2): T1 (display process 1' of bit plane data 1): T0 (display process 0' of bit plane data 0) = 8:4:2:1.

[0069] The total duration of the light source turning off process 12 of the bit plane data 1 is greater than or equal to the loading duration of a single bit plane data.

[0070] During the display process based on the bit plane data 3, the loading of the bit plane data 2 can be completed within the display duration of the bit plane data 3, and after the display of the bit plane data 3 is completed, the display based on the bit plane data 2 is started.

[0071] During the display process based on bit plane data 2, the loading of bit plane data 1 can be completed within the display duration of bit plane data 2, and after the display of bit plane data 2 is completed, the display based on bit plane data 1 is started.

[0072] During the display process based on bit plane data 1, bit plane data 0 can be loaded within the display duration of bit plane data 1, and bit plane data 0 can continue to be loaded within the duration of turning off the light source after the display of bit plane data 1 is completed until the loading is completed, after which display based on bit plane data 0 can be started.

[0073] For example, in a specific case, Figure 4 As shown in (D), under this time axis, in the display process 3' of the bit plane data 3, the bit plane data 2 is loaded at the same time, and the display process 2' of the bit plane data 2 is shown before Figure 4 (B) The same texture-filled rectangle represents the loading process of bit plane data 2.

[0074] In the display process 2' of the bit plane data 2, the bit plane data 1 is loaded at the same time. The display process 1' of the bit plane data 1 is the same as that shown before. Figure 4 (B) The same texture-filled rectangle represents the loading process of bit plane data 1.

[0075] In the light source closing process 12 of the bit plane data 1, the bit plane data 0 is loaded at the same time, and the display process 0′ of the bit plane data 0 is the same as that shown before. Figure 4 (B) The same texture-filled rectangle represents the loading process of bit plane data 0, and the process after the loading process of bit plane data 0 is the display process 0′ of bit plane data 0.

[0076] Based on the above method, by adding a light source shutoff process for the bit plane data whose corresponding display duration is shorter than the loading duration of a single bit plane data, and by making the duration of the light source shutoff process greater than or equal to the loading duration of a single bit plane data, sufficient time is obtained to load the next bit plane data of the bit plane data during the process of displaying the bit plane data and turning off the light source.

[0077] It should be noted that, in practice, the number of the above-mentioned bit plane data can be any number, which can be determined according to actual needs and is not limited here.

[0078] Furthermore, the liquid crystal display device is an LCOS liquid crystal display device.

[0079] Specifically, the liquid crystal display device may be an LCOS liquid crystal display device, and may also be replaced with other types of liquid crystal display devices if conditions permit. The specific method may be determined according to actual needs and is not limited here.

[0080] On the basis that the liquid crystal display device is an LCOS liquid crystal display device, further, the display duration of the first bit plane data is twice the display duration of the second bit plane data displayed subsequently.

[0081] Specifically, during the display process of the liquid crystal display device, the adjacent first plane data and second plane data mentioned above are displayed in sequence, and the duration of the display process corresponding to the first plane data is twice the duration of the display process corresponding to the second plane data.

[0082] On the basis that the liquid crystal display device is an LCOS liquid crystal display device, further, a frame of image data includes multiple bit plane data, and the multiple bit plane data may include at least two bit plane data located in a first interval, and the display time of each bit plane data in the first interval is less than the loading time of a single bit plane data.

[0083] In any two adjacent bit-plane data of the at least two bit-plane data located in the first interval, the display duration of the bit-plane data displayed first is twice the display duration of the bit-plane data displayed later.

[0084] The plurality of bit-plane data may further include at least two bit-plane data located in the second interval, and the display duration of each bit-plane data in the second interval is greater than or equal to the loading duration of a single bit-plane data;

[0085] The display period of the bit plane data in the second interval is modulated into a plurality of sub-display periods with the same display duration based on the display period of the preset bit plane.

[0086] Specifically, when displaying a plurality of bit plane data in the frame of image data, the bit plane data whose sub-display period in the second interval is close to the display period in the first interval may be displayed preferentially.

[0087] In an application scenario, such as Figure 5 As shown, a frame of image data may include bit plane data 7, 6, 5, and X, where bit plane data X includes bit plane data 4, 3, 2, 1, and 0. The bit plane data in a frame of image may be divided into data of different intervals based on the relationship between each bit plane data and the loading duration of a single bit plane data.

[0088] like Figure 5 As shown, assuming that the display duration of bit-plane data 5 and X is less than the loading duration of a single bit-plane data, bit-plane data 5 and X are divided into bit-plane data of the first interval. Also assuming that the display duration of bit-plane data 7 and 6 is greater than or equal to the loading duration of a single bit-plane data, bit-plane data 7 and 6 are divided into bit-plane data of the second interval.

[0089] like Figure 5As shown, the display periods corresponding to the bit plane data 7 and 6 in the second interval are modulated into sub-display periods 71-74 and sub-display periods 61-62, and the display durations of any two sub-display periods 71-74 and sub-display periods 61-62 are the same.

[0090] Optionally, the positions of bit planes 7 and 6 are not affected by Figure 5 The position sequence shown is limited. That is, the bit plane data 7 and 6 can be two adjacent bit plane data or two bit plane data spaced apart from each other, which is not limited here.

[0091] When displaying the image corresponding to the frame of image data, several sub-display periods close to the first interval may be displayed preferentially, for example:

[0092] In the first method, the sub-display periods 74, 61, and 62 may be displayed first, and then the sub-display periods 71, 72, and 73 may be displayed.

[0093] In the second manner, the sub-display periods 61 and 62 may be displayed first, and then the sub-display periods 71, 72, 73, and 74 may be displayed.

[0094] In a third manner, the sub-display period 62 may be displayed first, and then the sub-display periods 71, 72, 73, 74, and 61 may be displayed.

[0095] In addition to the above three methods, other methods may be used to preferentially display the display time period close to the first interval.

[0096] Based on the above method, by preferentially displaying all or part of the sub-display period of the bit plane data close to the first interval and then displaying all or part of the sub-display period of the bit plane data far away from the first interval, the pixels in the liquid crystal display device can be kept fixed for a long time due to the display time of the bit plane data in the second interval, which makes the voltage difference between pixels remain at the maximum and causes pixel crosstalk, thereby reducing the time that the voltage difference between pixels remains at the maximum, thereby improving the user experience of the liquid crystal display device.

[0097] In addition, the bit plane data 5-0 in the first interval may be displayed after the bit plane data 7 and 6 in the second interval are displayed, and the bit plane data 5-0 in the first interval may be displayed according to the following example. Figure 4 In the application scenario shown, the bit plane data in the first interval is displayed by adding a light source shut-off process, so as to ensure that there is enough time to complete the loading of the next bit plane data when displaying the bit plane data in the first interval and shutting down the light source accordingly.

[0098] Different from the existing technology, the technical solution of the present application can turn off the light source of the liquid crystal display device after controlling it to display the first plane data when the loading time of a single bit plane data is longer than the display time of the first bit plane data, and load the second bit plane data displayed adjacent to the first bit plane data during the process of turning off the light source after the display of the first bit plane data is completed, so that the liquid crystal display device can obtain sufficient time to load the second bit plane data before displaying the second bit plane data, thereby avoiding the situation where the loading speed of the liquid crystal display device must be increased to ensure that the loading of the second bit plane data can be completed when the first bit plane data is displayed. Based on the above method, the loading of the second bit plane data can be completed in time under a low loading speed, thereby reducing the cost of data driving.

[0099] This application also proposes a liquid crystal display device. Figure 6 , Figure 6 Schematic diagram of an embodiment of a liquid crystal display device of the present application. The liquid crystal display device 60 includes a display driver chip 61. The display driver chip 61 can execute any of the display driving methods described in the above embodiments when driving the liquid crystal display device 61 to display images.

[0100] The liquid crystal display device 60 may include a memory storing a display driver for the liquid crystal display device 60. The memory may be, but is not limited to, a USB flash drive, an SD card, a PD optical drive, a mobile hard drive, a large-capacity floppy drive, a flash memory, a multimedia memory card, a server, a FPGA, or a storage unit in an ASIC. The display driver chip 61 executes the display driver stored in the memory to implement any of the display driving methods described in the preceding embodiments.

[0101] Specifically, the liquid crystal display device 60 may be a liquid crystal driver chip, and the liquid crystal display device 61 may be an LCOS liquid crystal display device or other types of liquid crystal display devices.

[0102] Different from the existing technology, the technical solution of the present application can turn off the light source of the liquid crystal display device after controlling it to display the first plane data when the loading time of a single bit plane data is longer than the display time of the first bit plane data, and load the second bit plane data displayed adjacent to the first bit plane data during the process of turning off the light source after the display of the first bit plane data is completed, so that the liquid crystal display device can obtain sufficient time to load the second bit plane data before displaying the second bit plane data, thereby avoiding the situation where the loading speed of the liquid crystal display device must be increased to ensure that the loading of the second bit plane data can be completed when the first bit plane data is displayed. Based on the above method, the loading of the second bit plane data can be completed in time under a low loading speed, thereby reducing the cost of data driving.

[0103] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display driving method, characterized in that: Applied to a liquid crystal display device, the display driving method includes: controlling the liquid crystal display device to display the first bit-plane data within a display duration of the first bit-plane data; When the loading time of a single bit plane data is longer than the display time of the first bit plane data, after the display of the first bit plane data is completed, the liquid crystal display device is controlled to turn off its corresponding light source, and the loading of the second bit plane data is completed during the process of turning off the light source after the display of the first bit plane data is completed, wherein the first bit plane data and the second bit plane data are displayed adjacent to each other in sequence.

2. The display driving method according to claim 1, wherein: When the loading duration of the single bit-plane data is less than or equal to the display duration of the first bit-plane data, the loading of the second bit-plane data is completed during the display of the first bit-plane data.

3. The display driving method according to claim 1, wherein: The method of controlling the liquid crystal display device to turn off the corresponding light source after the first bit plane data is displayed, and completing the loading of the second bit plane data during the process of turning off the light source after the first bit plane data is displayed, includes: The second bit plane data is loaded during the display process of the first bit plane data, and the second bit plane data is continuously loaded during the light source turning off after the display of the first bit plane data is completed until the loading of the second bit plane data is completed.

4. The display driving method according to claim 1, wherein: The method of controlling the liquid crystal display device to turn off the corresponding light source after the first bit plane data is displayed, and completing the loading of the second bit plane data during the process of turning off the light source after the first bit plane data is displayed, includes: The second bit-plane data is loaded during the process of turning off the light source until the loading of the second bit-plane data is completed.

5. The display driving method according to any one of claims 1 to 4, wherein: The display duration of the first bit-plane data is twice the display duration of the second bit-plane data displayed subsequently.

6. The display driving method according to any one of claims 1 to 4, wherein: A frame of image data includes multiple bit plane data, and the multiple bit plane data include at least two bit plane data located in a first interval, and the display time of each bit plane data in the first interval is less than the loading time of the single bit plane data; in any two adjacent bit plane data of the at least two bit plane data located in the first interval, the display time of the bit plane data displayed first is twice the display time of the bit plane data displayed later.

7. The display driving method according to claim 6, wherein: The plurality of bit-plane data further include at least two bit-plane data located in a second interval, and a display duration of each bit-plane data in the second interval is greater than or equal to a loading duration of the single bit-plane data; The display period of the bit plane data in the second interval is modulated into a plurality of sub-display periods with the same display duration based on the display period of the preset bit plane.

8. The display driving method according to claim 7, wherein: The display of the plurality of bit plane data comprises: The bit plane data having a sub-display period in the second interval close to the display period in the first interval is preferentially displayed.

9. A display driver chip, characterized in that: The display driver chip can execute the display driving method according to any one of claims 1 to 8 when driving a liquid crystal display device to display images.

10. A liquid crystal display device, characterized in that: The liquid crystal display device can execute the display driving method according to any one of claims 1 to 8 when displaying images.

Images