A driving method for a new type of display screen

Abstract

The present invention provides a driving method for a new type of display screen, comprising the following steps: S1. Bind the value of CK in the Data packet to the display screen refresh rate and store it in the IC. The higher the display screen refresh rate, the larger the corresponding value of CK in the Data packet; S2. The control platform issues an instruction to determine whether to switch the display screen refresh rate; S3. If the display screen refresh rate is to be switched, after the control platform receives the display screen refresh rate to be switched, read the corresponding value of CK in the Data packet from the IC, and then output the corresponding Data timing and CK timing; if the display screen refresh rate is not switched, keep outputting the current Data timing and CK timing; S4. Apply the Data timing and CK timing to the source line and gate line of the pixel transistor of the display screen respectively. The advantages of the present invention are as follows: Different values of CK in the Data packet are paired with different display screen refresh rates. By changing the value of CK in the Data packet, horizontal crosstalk is eliminated for display screens with different refresh rates.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a novel driving method for a display screen. Background Art

[0002] With the rapid development of the times, people are using more and more mobile phones. Games, dramas, chats, videos, communications, payments, navigation, etc. are all inseparable from mobile phones. In order to meet various needs, mobile phones have more and more corresponding functions. For example, in order to meet the needs of optimizing the picture quality of games and dramas, high refresh rates (hereinafter referred to as high refreshes) have emerged, but the power consumption is relatively large at the same time. When not playing games, high refreshes mean high power consumption. Therefore, the mobile phone will maintain a regular low refresh rate (hereinafter referred to as low refresh) state when not playing games, and switch to a high refresh state when playing games or chasing dramas, which is called a dynamic refresh rate.

[0003] Combination Figure 1 The display of the liquid crystal display panel is completed by controlling the pixel TFT in the display screen. Specifically, the horizontally distributed gate line (Gate) controls the on and off of the pixel TFT, and the vertically distributed source line (Source) writes the data voltage to be displayed to the pixel TFT. When the gate line is high, the pixel TFT is turned on, and the data voltage enters the parallel liquid crystal capacitor and storage capacitor; when the gate line is low, the pixel TFT is turned off, and the data voltage cannot enter the liquid crystal capacitor and storage capacitor. The data voltage is used to adjust the transmittance of the liquid crystal.

[0004] Since the horizontal gate lines and the vertical source lines are staggered and thus circuit coupling exists, when the phase of the CK timing and the Data timing are too close, the display screen will have linear horizontal crosstalk due to circuit coupling, such as Figure 2 As shown. In order to eliminate horizontal crosstalk, the Data timing is generally staggered with the CK timing, that is, the Data packet CK. The existing practice is to share a Data packet CK at the refresh rate of each display screen, that is, T1 = T2 = T3, as shown in Figure 3 If the T time is too long, that is, the phase difference between the CK timing and the Data timing is too large, the charging time of the liquid crystal capacitor and the storage capacitor will be insufficient; if the T time is too short, that is, the phase difference between the CK timing and the Data timing is too close, horizontal crosstalk will occur on the display.

[0005] The frequency of the CK timing controls the refresh rate of the display screen. When the refresh rate of the display screen is higher, the coupling effect between the CK timing and the Data timing corresponding to the gate line and the source line is stronger. Therefore, under the condition that each display screen shares a Data packet CK at the refresh rate, there is such a situation: the display screen with a low refresh rate displays normally, while the display screen with a high refresh rate has horizontal crosstalk.

[0006] Therefore, how to eliminate horizontal crosstalk in display screens with different refresh rates is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a driving method for a new type of display screen to eliminate horizontal crosstalk in display screens with different refresh rates.

[0008] The present invention is implemented as follows: A driving method for a new type of display screen includes the following steps:

[0009] S1. Bind the value of CK in the Data packet to the display screen refresh rate and store it in the IC. The higher the display screen refresh rate, the larger the corresponding value of CK in the Data packet.

[0010] S2. The control platform issues an instruction to determine whether to switch the display screen refresh rate.

[0011] S3. If the display screen refresh rate is to be switched, after the control platform receives the display screen refresh rate to be switched, read the corresponding value of CK in the Data packet from the IC, and then output the corresponding Data timing and CK timing.

[0012] If the display screen refresh rate is not switched, keep outputting the current Data timing and CK timing.

[0013] S4. Apply the Data timing and CK timing to the source line and gate line of the display screen pixel transistor respectively.

[0014] Further, there are three display screen refresh rates, namely low refresh rate, normal refresh rate, and high refresh rate.

[0015] Further, the control platform is the CPU of the mobile phone.

[0016] Further, whether to switch the display screen refresh rate appears in the form of a dialog box on the display screen of the mobile phone.

[0017] Further, the display screen of the mobile phone is a touch screen.

[0018] Further, specifically for S2, when the mobile phone switches between the operation mode requiring high-quality picture quality and the operation mode requiring ordinary picture quality, the control platform issues an instruction to determine whether to switch the display screen refresh rate.

[0019] Further, specifically for S1:

[0020] Arrange the required different display screen refresh rates in ascending order. The nth display screen refresh rate is denoted as R n , n≥2;

[0021] Select the display screen refresh rate R1 for detection. First, set the value of CK in the Data packet to zero, and then gradually increase the value of CK in the Data packet in increments of Δt. Each time the value of CK in the Data packet is increased, check whether there is horizontal crosstalk on the display screen. When there is no horizontal crosstalk on the display screen, stop increasing the value of CK in the Data packet. At this time, set the value of CK in the Data packet to T1’, and bind the value T1’ of the Data packet CK to the display screen refresh rate R1 and store it in the IC;

[0022] Select the display screen refresh rate R n for detection. Use the value T n-1 ’ of the Data packet CK as the initial value and gradually increase it by Δt. Each time the value of CK in the Data packet is increased, check whether there is horizontal crosstalk on the display screen. When there is no horizontal crosstalk on the display screen, stop increasing the value of CK in the Data packet. At this time, set the value of CK in the Data packet to T n ’ and bind the value T n ’ of the Data packet CK to the display screen refresh rate R n and store it in the IC.

[0023] The advantages of the present invention are as follows: 1. Different values of the Data packet CK are paired with different display screen refresh rates. When it is necessary to switch the display screen refresh rate, by reading the IC, the corresponding value of the Data packet CK can be quickly obtained, and the corresponding Data timing and CK timing are output. By changing the value of the Data packet CK, horizontal crosstalk can be eliminated for display screens with different refresh rates. 2. The higher the display screen refresh rate, the larger the corresponding value of the Data packet CK. By sorting the display screen refresh rates and gradually increasing the value of the Data packet CK, the optimal value of the Data packet CK is found. In the case of solving the horizontal crosstalk of the display screen, the charging rates of the maximum liquid crystal capacitance and storage capacitance are achieved for each display screen refresh rate, making the image quality of the display screen better. Brief Description of the Drawings

[0024] The present invention will be further described below with reference to the accompanying drawings in conjunction with embodiments.

[0025] Figure 1 is a circuit schematic diagram of a gate line, a source line, and a pixel TFT in the background art.

[0026] Figure 2 is a schematic diagram of horizontal crosstalk on a display screen in the background art.

[0027] Figure 3 is a timing schematic diagram of sharing a single Data packet CK at each refresh rate in the background art.

[0028] Figure 4 is a timing schematic diagram of different Data packet CKs paired with different refresh rates in the present invention.

[0029] Figure 5 It is a flowchart of the driving method for the novel display screen of the present invention.

[0030] Reference numerals: gate line 1; source line 2; pixel TFT 3; liquid crystal capacitor 4; storage capacitor 5; parasitic capacitor 6; display screen 7; horizontal crosstalk 8. Detailed implementation manners

[0031] By providing a driving method for a novel display screen in an embodiment of the present invention, the disadvantages of sharing a single Data packet CK at various refresh rates in the background art are solved, achieving the technical effects of eliminating horizontal crosstalk for display screens with different refresh rates and having respective maximum charging rates at each refresh rate, thereby improving the image quality.

[0032] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0033] Refer to Figures 1 to 5 , a preferred embodiment of the present invention.

[0034] A driving method for a novel display screen includes the following steps:

[0035] S1. Bind the value of the Data packet CK to the display screen refresh rate and store it in the IC. The higher the display screen refresh rate, the larger the value of the corresponding Data packet CK.

[0036] S2. The control platform issues an instruction to determine whether to switch the display screen refresh rate.

[0037] S3. If the display screen refresh rate is to be switched, after the control platform receives the display screen refresh rate to be switched, read the corresponding value of the Data packet CK from the IC, and then output the corresponding Data timing and CK timing.

[0038] If the display screen refresh rate is not switched, keep outputting the current Data timing and CK timing.

[0039] S4. Apply the Data timing and CK timing to the source line and gate line of the display screen pixel transistor respectively.

[0040] There are three refresh rates for the display screen, namely low refresh rate, regular refresh rate and high refresh rate. The corresponding Data packet CK values ​​are T1', T2', and T3' respectively. T1'<T2'<T3. Since the horizontal gate lines and the vertical source lines are staggered and thus there is parasitic capacitance (also called coupling capacitance), when the refresh rate of the display screen is higher, the coupling effect between the gate line and the source line corresponding to the CK timing and the Data timing is stronger. Therefore, in the embodiment of the present invention, when the refresh rate of the display screen is higher, the larger the value of the selected Data packet CK is, so that the horizontal crosstalk is eliminated for display screens with different refresh rates.

[0041] For ease of understanding, an example is given here where the low refresh rate is 20 Hz, 30 Hz, or 40 Hz, the regular refresh rate is 60 Hz, and the high refresh rate is 90 Hz or 120 Hz. The specific low refresh rate, regular refresh rate, and high refresh rate are set by the manufacturer according to actual conditions.

[0042] The control platform is the CPU of the mobile phone.

[0043] The question of whether to switch the refresh rate of the display screen appears in the form of a dialog box on the display screen of the mobile phone. When the user sees "whether to switch the refresh rate of the display screen", the user selects the refresh rate of the display screen, and the selected operation is fed back to the control platform.

[0044] The display screen of the mobile phone is a touch screen. The user directly performs a refresh rate selection operation on the display screen.

[0045] Specifically, S2 is that when the mobile phone switches between the operation mode requiring high-quality image quality and the operation mode requiring ordinary image quality, the control platform issues an instruction on whether to switch the refresh rate of the display screen. For ease of understanding, an example is given here, where the operation mode requiring high-quality image quality is game mode, film and television drama playback mode, video call mode, etc., and the operation mode requiring ordinary image quality is picture browsing mode, text chat mode, payment mode, etc. The specific division of the operation mode is set by the manufacturer according to the actual situation.

[0046] For example, the current mobile phone is in the picture browsing mode, and the display screen is in the low refresh rate state. After the mobile phone starts the game, the control platform issues a command to switch the display screen refresh rate. After the user selects a high refresh rate, the control platform makes the display screen in the high refresh rate state, and directly reads the corresponding Data packet CK from the IC, and outputs the corresponding CK timing and Data timing to the gate line and source line. In this way, it can ensure that the display screen has no horizontal crosstalk at each refresh rate, and can also improve the charging rate of the liquid crystal capacitor and the storage capacitor, so as to make the picture quality better.

[0047] The following is to find the best CK value of the Data packet. The phase of the CK timing and the Data timing will not be too close. Under the condition of solving the horizontal crosstalk of the display screen, the phase of the CK timing and the Data timing will not be too far away, ensuring that the liquid crystal capacitor and the storage capacitor have the maximum charging rate at each display screen refresh rate. The specific S1 is: arrange the required different display screen refresh rates from small to large, and the nth display screen refresh rate is represented by R n , n≥2; in this embodiment, there are three refresh rates for the display screen: low refresh rate, regular refresh rate and high refresh rate, which are arranged from small to large as R1, R2, and R3.

[0048] Select the display refresh rate R1 for detection, first set the value of the Data packet CK to zero, here the phase of the CK timing and the Data timing is not staggered, that is, the phase of the CK timing and the Data timing coincides; then gradually increase the value of the Data packet CK in increments of Δt, that is, gradually stagger the phase of the CK timing and the Data timing; each time the value of the Data packet CK is increased, it is detected whether the display has horizontal crosstalk. When the display has no horizontal crosstalk, stop increasing the value of the Data packet CK. At this time, the value of the Data packet CK is set to T1', and the value of the Data packet CK T1' is bound to the display refresh rate R1 and stored in the IC; at this time, the value of the Data packet CK T1' can just solve the horizontal crosstalk of the display, and can also ensure that the liquid crystal capacitor and storage capacitor of the display have the maximum charging rate. Here, the display refresh rate R1 is a low refresh rate.

[0049] Select the display refresh rate R n To test, use the value T of CK in Data packet n-1 ' is the initial value and gradually increases Δt. Each time the value of Data packet CK is increased, it is detected whether the display screen has horizontal crosstalk. When the display screen has no horizontal crosstalk, the value of Data packet CK is stopped from increasing. At this time, the value of Data packet CK is set to T n ', wrap the value of CK in Data n ' and display refresh rate R n The corresponding data is bound and stored in IC.

[0050] After determining the value T1' of the Data packet CK corresponding to the low refresh rate, select the normal refresh rate, i.e. R2, for detection, and use the value T1' of the Data packet CK as the initial value and gradually increase Δt until there is no horizontal crosstalk on the display. At this time, the value T2' of the Data packet CK solves the horizontal crosstalk of the display under the normal refresh rate, and can also ensure that the liquid crystal capacitor and the storage capacitor of the display have the maximum charging rate.

[0051] After determining the value T2' of Data packet CK corresponding to the conventional refresh rate, the high refresh rate, i.e., R3, is selected for detection. Taking the value T2' of Data packet CK as the initial value and gradually increasing Δt until there is no horizontal crosstalk on the display screen, the value T3' of Data packet CK at this time is to solve the horizontal crosstalk of the display screen under the high refresh rate and can also ensure that the liquid crystal capacitor and the storage capacitor of the display screen have the maximum charging rate.

[0052] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be covered by the scope protected by the claims of the present invention.

Claims

1. A driving method for a new type of display screen, characterized in that, It includes the following steps: S1. Arrange the required different display screen refresh rates in ascending order. The refresh rate of the nth display screen is denoted as R n , where n ≥ 2; Select the display screen refresh rate R1 for detection. First, set the value of the Data packet CK to zero, then gradually increase the value of the Data packet CK in increments of Δt. Each time the value of the Data packet CK is increased, check whether there is horizontal crosstalk on the display screen. When there is no horizontal crosstalk on the display screen, stop increasing the value of the Data packet CK. At this time, set the value of the Data packet CK to T1', and bind the value T1' of the Data packet CK to the display screen refresh rate R1 and store it in the IC; Select the display screen refresh rate R n Perform detection with the value T of the Data packet CK n-1 ’ as the initial value and gradually increase Δt. Each time the value of the Data packet CK is increased, check whether there is horizontal crosstalk on the display screen. When there is no horizontal crosstalk on the display screen, stop increasing the value of the Data packet CK. At this time, set the value of the Data packet CK to T n ’. Set the value T of the Data packet CK n ’ corresponding to and bind it with the display screen refresh rate R n and store it in the IC; S2. The control platform issues an instruction to determine whether to switch the display screen refresh rate; S3. If the display screen refresh rate is to be switched, after the control platform receives the display screen refresh rate to be switched, read the corresponding value of the Data packet CK from the IC, and then output the corresponding Data timing and CK timing; If the display screen refresh rate is not switched, keep outputting the current Data timing and CK timing; S4. The Data timing and CK timing are respectively applied to the source line and gate line of the display screen pixel transistor.

2. The driving method of a novel display screen according to claim 1, characterized in that, There are three display screen refresh rates, namely low refresh rate, normal refresh rate, and high refresh rate.

3. A driving method for a novel display screen according to claim 1, characterized in that, The control platform is the CPU of the mobile phone.

4. A driving method for a novel display screen according to claim 3, characterized in that, Whether to switch the display screen refresh rate appears in the form of a dialog box on the display screen of the mobile phone.

5. A driving method for a novel display screen according to claim 3, characterized in that The display screen of the mobile phone is a touch screen.

6. The driving method of a novel display screen according to claim 4, characterized in that, Specifically, for S2, when the mobile phone switches between the operation mode requiring high-quality picture quality and the operation mode requiring ordinary picture quality, the control platform issues an instruction to determine whether to switch the display screen refresh rate.

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