Display driving method and device of liquid crystal display screen

Abstract

The invention discloses a display driving method and device of a liquid crystal display screen, and the method comprises the steps: carrying out the real-time detection of LVDS data transmission, and obtaining the data state of the LVDS data transmission; if the data state is abnormal, reverse scanning is carried out on the display area, a previous frame of display data is re-written into the completed display area, and information of the abnormal data state is fed back to the host; and waiting for the host to reset the LVDS data transmission, and if the LVDS data transmission is normal after resetting, continuing to write the data into the display area. When the terminal or the abnormity occurs through LVDS data transmission, the previous frame of display data is read from the storage unit of the liquid crystal display screen and is written into the completed display area, or the display area is continuously subjected to forward scanning, and the current frame of display data is written into the display area, so that the occurrence of the abnormity of upper and lower split screens and wrong data charging is avoided, and the user experience is improved. Therefore, the problem that the split-screen phenomenon of liquid crystal display is easily caused in the processing process of an existing write-in pause scheme is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of split screen processing of liquid crystal display screens, and in particular to a display driving method and device of a liquid crystal display screen. Background Art

[0002] The host of the LCD device transmits data to the LCD screen through the LVDS (Low Voltage Differential Signaling) interface, which transmits data through a pair of differential signal lines, one line transmits a positive voltage signal, and the other transmits a reverse voltage signal. The two signals have equal amplitudes, 180 degrees of phase difference, opposite polarity, and are coupled to each other. The LVDS transmitter converts the unbalanced TTL signal into a balanced LVDS signal, which is transmitted through a differential signal interconnect (including cables or PCB traces, terminal matching resistors), and the LVDS receiver converts the balanced LVDS signal into an unbalanced TTL signal.

[0003] However, existing liquid crystal display devices are often affected by static electricity or the surrounding environment, which may cause interruption of data signals transmitted from the host to the driver IC of the liquid crystal display. For example, when the host transmits data to the driver IC of the display through the LVDS interface, it is often affected by static electricity or surrounding signals, resulting in data interruption on the LVDS transmission signal line. At this time, the display driver IC cannot receive the correct signal, and the display screen will also show abnormalities.

[0004] In the prior art, the method for handling the above-mentioned display anomaly is to usually pull the gate drive signal, data line signal and other signals of the display area to a low potential, so that subsequent abnormal data cannot be written into the display screen. However, since the current frame data is not written completely, part of the data written is the previous frame data, and part of the data written is the current frame data. The display area may also appear to be split into upper and lower screens. Especially in a liquid crystal display device with pre-charging turned on, erroneous data may also be written into pixels that should not be written. Summary of the invention

[0005] In the process of transmitting data from the host of the existing LCD device to the LCD screen through the LVDS interface, due to the influence of static electricity or the surrounding environment, data interruption may occur on the LVDS transmission signal line. The existing pause writing solution can easily cause a split screen phenomenon in the LCD display during the processing process.

[0006] In view of the above problems, a display driving method and device for a liquid crystal display screen are proposed. When a terminal or anomaly occurs in LVDS data transmission, the previous frame display data is read from the storage unit of the liquid crystal display screen and written to the completed display area, or the display area continues to be scanned forward and the current frame display data is written, thereby avoiding the upper and lower screen splitting and the occurrence of data mischarging anomalies, thereby solving the problem that the existing pause writing scheme can easily cause the liquid crystal display to have a split screen phenomenon during the processing process.

[0007] In a first aspect, a display driving method of a liquid crystal display screen comprises: Step 100, performing real-time detection on LVDS data transmission to obtain the data status of the LVDS data transmission; Step 200: If the data state is abnormal, the display area is reversed, the completed display area is rewritten with the previous frame of display data, and the information of the abnormal data state is fed back to the host; Step 300: Wait for the host to reset the LVDS data transmission. If the LVDS data transmission is normal after the reset, continue to write data to the display area.

[0008] In combination with the display driving method of the liquid crystal display screen described in the first aspect of the present invention, in a first possible implementation manner, the display driving method of the liquid crystal display screen further includes: Step 400, waiting for the host to reset the LVDS data transmission; Step 500: If the host has not reset the LVDS data transmission after a specified time, a special pattern is sent to the display area to indicate that the display data is abnormal.

[0009] In combination with the first possible implementation of the first aspect of the present invention, in a second possible implementation, step 200 includes: Step 210, reading the last frame of display data from the storage unit of the liquid crystal display screen; Step 220: Write the read display data of the previous frame into the display area that has completed scanning.

[0010] In a second aspect, a display driving method of a liquid crystal display screen comprises: Step 600, real-time detection of LVDS data transmission is performed to obtain the data status of the LVDS data transmission. If the data status is abnormal, the display area continues to be scanned forward, the display data of the current frame continues to be written, and the information of the abnormal data status is fed back to the host; Step 700, waiting for the host to reset the LVDS data transmission, if the LVDS data transmission is normal after the reset, continue to write data to the display area.

[0011] In conjunction with the display driving method of the liquid crystal display screen described in the second aspect of the present invention, in a first possible implementation manner, the display driving method of the liquid crystal display screen further includes: Step 800, waiting for the host to reset the LVDS data transmission; Step 900: If the host has not reset the LVDS data transmission after a specified time, a special pattern is sent to the display area to indicate that the display data is abnormal.

[0012] In combination with the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner, step 600 includes: Step 610, continue to read the current frame display data from the storage unit of the liquid crystal display screen; Step 620: Write the read display data of the current frame into the display area that has not been scanned.

[0013] In a third aspect, a display driving device of a liquid crystal display screen adopts the display driving method of the liquid crystal display screen described in the first aspect, comprising: A first detection unit, used for performing real-time detection on LVDS data transmission and obtaining a data state of the LVDS data transmission; A first storage unit, used for storing display data transmitted from the host; The first writing unit is used to reverse scan the display area when the data state is abnormal, read the previous frame display data from the first storage unit, rewrite the completed display area with the previous frame display data, and feed back the abnormal data state information to the host.

[0014] In conjunction with the display driving device of the liquid crystal display screen described in the third aspect of the present invention, in a first possible implementation manner, the display driving device of the liquid crystal display screen further includes: The first prompt unit is used to send a special pattern to the display area to prompt that the display data is abnormal after the host fails to reset the LVDS data transmission for more than a specified time.

[0015] In a fourth aspect, a display driving device of a liquid crystal display screen adopts the display driving method of the liquid crystal display screen described in the second aspect, comprising: A second detection unit is used to perform real-time detection on LVDS data transmission and obtain a data state of the LVDS data transmission; A second storage unit, used for storing display data transmitted from the host; The second writing unit is used to continue to scan the display area in the normal direction when the data state is abnormal, continue to read the current frame display data from the second storage unit, continue to write the current frame display data, and feed back the information of the abnormal data state to the host.

[0016] In conjunction with the display driving device of the liquid crystal display screen described in the fourth aspect of the present invention, in a first possible implementation manner, the display driving device of the liquid crystal display screen further includes: The second prompting unit is used to send a special pattern to the display area to prompt that the display data is abnormal after the host fails to reset the LVDS data transmission for more than a specified time.

[0017] A display driving method and device for a liquid crystal display screen described in the present invention is implemented. When a terminal or anomaly occurs in LVDS data transmission, the previous frame of display data is read from the storage unit of the liquid crystal display screen and written to the completed display area, or the display area continues to be scanned forward and the current frame of display data is written, thereby avoiding the occurrence of upper and lower screen splits and data mischarging anomalies, thereby solving the problem that the existing pause writing scheme easily causes the liquid crystal display to have a split screen phenomenon during the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic diagram of split-screen display of a liquid crystal display in the prior art solution; Figure 2 This is a schematic flow chart of a first specific embodiment of a display driving method for a liquid crystal display screen in the present application; Figure 3 yes Figure 1 A schematic flow chart of a specific embodiment after step 300; Figure 4 yes Figure 2 A schematic flow chart of a specific embodiment of step 200; Figure 5 This is a schematic flow chart of a second specific embodiment of a display driving method for a liquid crystal display screen in the present application; Figure 6 yes Figure 5 A schematic flow chart of a specific embodiment after step 700; Figure 7 yes Figure 5A flowchart of a specific embodiment of step 600; Figure 8 It is a schematic structural diagram of a first specific embodiment of a display driving device of a liquid crystal display screen in the present application; Fig. 9 It is a schematic structural diagram of a second specific embodiment of a display driving device for a liquid crystal display screen in the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the process of transmitting data from the host of the existing LCD device to the LCD screen through the LVDS interface, due to the influence of static electricity or the surrounding environment, the LVDS transmission signal line may experience data interruption. The existing pause writing solution can easily cause the LCD display to appear split screen during the processing process. Figure 1 , Figure 1 It is a schematic diagram of split-screen display of a liquid crystal display in the prior art solution.

[0026] The existing solution is to pull the Gate signal, Data signal and other signals in the display area to a low potential. This method will prevent subsequent abnormal data from being written into the display screen. However, since the data of the current frame is not completely written, part of the data written is the previous frame data, and part of the data written is the current frame data, the display area will also appear to be split into upper and lower screens. Especially in a display device with pre-charging turned on, erroneous data will also be written into pixels that should not be written.

[0027] In view of the above problems, a display driving method and device for a liquid crystal display screen are proposed.

[0028] In a first aspect, a display driving method of a liquid crystal display screen is provided. Figure 2 , Figure 2 This is a schematic flow chart of a first specific embodiment of a display driving method for a liquid crystal display screen in the present application; it includes: Step 100: Real-time detection of LVDS data transmission is performed to obtain the data status of LVDS data transmission. Step 200: If the data status is abnormal, the display area is reversed, the completed display area is rewritten with the previous frame of display data, and the abnormal data status information is fed back to the host.

[0029] In a preferred embodiment, if Figure 4 , Figure 4 yes Figure 2 A flow chart of a specific embodiment of step 200 in FIG. 2 is a flow chart of a specific embodiment of step 200; step 200 comprises: step 210, reading a previous frame of display data from a storage unit of a liquid crystal display screen; step 220, writing the read previous frame of display data into a display area that has completed scanning.

[0030] In this embodiment, when an abnormality in LVDS data transmission is detected, the forward scan is changed to reverse scan, and the completed data writing part is rewritten into the previous frame display data. At this time, the current frame data is not written into the display area, but the display data of the previous frame is written, and the LCD screen will not have abnormal phenomena such as display confusion and split screen.

[0031] Step 300, waiting for the host to reset the LVDS data transmission, if the LVDS data transmission is normal after the reset, continue to write data to the display area.

[0032] In a preferred embodiment, if Figure 3 , Figure 3 yes Figure 1 A flow chart of a specific embodiment after step 300 in the figure; the display driving method of the liquid crystal display screen also includes: step 400, waiting for the host to reset the LVDS data transmission; step 500, if the host has not reset the LVDS data transmission after the specified time, a special pattern is sent to the display area to prompt that the display data is abnormal.

[0033] In this embodiment, the host resets the LVDS data signal. If the LVDS data is normal, data writing continues. If the reset is not completed within a period of time, the IC sends a special pattern to the LCD screen to prompt that the display data is abnormal and to proceed to the next step, such as manual reset. When a terminal or abnormality occurs in the LVDS data transmission, the previous frame of display data is read from the storage unit of the LCD screen and written to the completed display area, or the display area continues to be scanned forward and the current frame of display data is written, avoiding the upper and lower split screens and the occurrence of data mischarging anomalies, thereby solving the problem that the existing pause writing solution easily causes the LCD display to split during the processing process.

[0034] In a second aspect, a display driving method of a liquid crystal display screen is provided. Figure 5 , Figure 5 This is a flow chart of a second specific embodiment of a display driving method for a liquid crystal display screen in the present application; it includes: Step 600: Real-time detection of LVDS data transmission is performed to obtain the data status of LVDS data transmission. If the data status is abnormal, the display area continues to be scanned forward, the display data of the current frame continues to be written, and the information of the abnormal data status is fed back to the host. In a preferred embodiment, Figure 7 , Figure 7 yes Figure 5 A flow chart of a specific embodiment of step 600 in FIG. 6 is shown; step 600 comprises: step 610, continuing to read the current frame display data from the storage unit of the liquid crystal display screen; step 620, writing the read current frame display data into the display area that has not been scanned.

[0035] In this embodiment, when an abnormality is detected in LVDS data transmission, the writing of the current frame display data is continued. At this time, the current frame data comes from the storage unit (RAM) of the IC, that is, the host has completed the data transmission to the storage unit (RAM) in advance, and it can be read. The data of the current frame is complete and the display area is not affected, because the host sends a complete frame of data to the RAM of the IC, and the IC starts to call the data in the RAM; when the LVDS signal transmission is abnormal, the subsequent frames cannot be transmitted to the RAM of the IC.

[0036] Step 700, waiting for the host to reset the LVDS data transmission. If the LVDS data transmission is normal after the reset, continue to write data to the display area.

[0037] In a preferred embodiment, if Figure 6 , Figure 6 yes Figure 5 A flow chart of a specific embodiment after step 700 in the figure; the display driving method of the liquid crystal display screen also includes: step 800, waiting for the host to reset the LVDS data transmission; step 900, if the host has not reset the LVDS data transmission after the specified time, a special pattern is sent to the display area to prompt that the display data is abnormal.

[0038] In this embodiment, the host resets the LVDS data signal. If the LVDS data is normal, data writing continues. If the reset is not completed within a period of time, the IC sends a special pattern to the LCD screen to prompt that the display data is abnormal and to proceed to the next step, such as manual reset. When a terminal or abnormality occurs in the LVDS data transmission, the previous frame of display data is read from the storage unit of the LCD screen and written to the completed display area, or the display area continues to be scanned forward and the current frame of display data is written, avoiding the upper and lower split screens and the occurrence of data mischarging anomalies, thereby solving the problem that the existing pause writing solution easily causes the LCD display to split during the processing process.

[0039] In a third aspect, a display driving device for a liquid crystal display screen adopts the display driving method for a liquid crystal display screen of the first aspect, such as Figure 8 , Figure 8 The present invention is a schematic structural diagram of a first specific embodiment of a display driving device for a liquid crystal display screen in the present application; it comprises: a first detection unit, used for real-time detection of LVDS data transmission, and obtaining the data status of LVDS data transmission; a first storage unit, used for storing display data transmitted from a host; a first writing unit, used for reverse scanning a display area when the data status is abnormal, reading the previous frame of display data from the first storage unit, rewriting the previous frame of display data into the completed display area, and feeding back information of the abnormal data status to the host.

[0040] Furthermore, the display driving device of the liquid crystal display screen also includes: a first prompting unit, which is used to send a special pattern to the display area to prompt that the display data is abnormal after the host fails to reset the LVDS data transmission for more than a specified time.

[0041] In a fourth aspect, a display driving device for a liquid crystal display screen adopts the display driving method for a liquid crystal display screen of the second aspect, such as Fig. 9 , Fig. 9 This is a schematic diagram of the structure of the second specific embodiment of a display driving device for a liquid crystal display screen in the present application. It includes: a second detection unit, used for real-time detection of LVDS data transmission, and obtaining the data status of LVDS data transmission; a second storage unit, used for storing display data transmitted from the host; a second writing unit, used for continuing to scan the display area, continuing to read the current frame display data from the second storage unit, and continuing to write the current frame display data when the data status is abnormal, and feeding back the abnormal data status information to the host.

[0042] Furthermore, the display driving device of the liquid crystal display screen also includes a second prompting unit, which is used to send a special pattern to the display area to prompt that the display data is abnormal after the host fails to reset the LVDS data transmission for more than a specified time.

[0043] A display driving method and device for a liquid crystal display screen of the present invention is implemented. When a terminal or anomaly occurs in LVDS data transmission, the previous frame display data is read from the storage unit of the liquid crystal display screen and written to the completed display area, or the display area is continued to be scanned forward and the current frame display data is written, thereby avoiding the upper and lower screen splitting and the occurrence of data mischarging anomalies, thereby solving the problem that the existing pause writing scheme can easily cause the liquid crystal display to have a split screen phenomenon during the processing process.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A display driving method for a liquid crystal display screen, characterized in that: include: Step 100, performing real-time detection on LVDS data transmission to obtain the data status of the LVDS data transmission; Step 200: If the data state is abnormal, the display area is reversed, the completed display area is rewritten with the previous frame of display data, and the information of the abnormal data state is fed back to the host; Step 300: Wait for the host to reset the LVDS data transmission. If the LVDS data transmission is normal after the reset, continue to write data to the display area.

2. The display driving method of a liquid crystal display screen according to claim 1, characterized in that: The display driving method of the liquid crystal display screen also includes: Step 400, waiting for the host to reset the LVDS data transmission; Step 500: If the host has not reset the LVDS data transmission after a specified time, a special pattern is sent to the display area to indicate that the display data is abnormal.

3. The display driving method of a liquid crystal display screen according to claim 2, characterized in that: The step 200 includes: Step 210, reading the last frame of display data from the storage unit of the liquid crystal display screen; Step 220: Write the read display data of the previous frame into the display area that has completed scanning.

4. A display driving method for a liquid crystal display screen, characterized in that: include: Step 600, real-time detection of LVDS data transmission is performed to obtain the data status of the LVDS data transmission. If the data status is abnormal, the display area continues to be scanned forward, the display data of the current frame continues to be written, and the information of the abnormal data status is fed back to the host; Step 700, waiting for the host to reset the LVDS data transmission, if the LVDS data transmission is normal after the reset, continue to write data to the display area.

5. The display driving method of a liquid crystal display screen according to claim 4, characterized in that: The display driving method of the liquid crystal display screen also includes: Step 800, waiting for the host to reset the LVDS data transmission; Step 900: If the host has not reset the LVDS data transmission after a specified time, a special pattern is sent to the display area to indicate that the display data is abnormal.

6. The display driving method of a liquid crystal display screen according to claim 5, characterized in that: The step 600 includes: Step 610, continue to read the current frame display data from the storage unit of the liquid crystal display screen; Step 620: Write the read display data of the current frame into the display area that has not been scanned.

7. A display driving device for a liquid crystal display screen, using the display driving method for a liquid crystal display screen according to any one of claims 1 to 3, characterized in that: include: A first detection unit, used for performing real-time detection on LVDS data transmission and obtaining a data state of the LVDS data transmission; A first storage unit, used for storing display data transmitted from the host; The first writing unit is used to reverse scan the display area when the data state is abnormal, read the previous frame display data from the first storage unit, rewrite the completed display area with the previous frame display data, and feed back the abnormal data state information to the host.

8. The display driving device of a liquid crystal display screen according to claim 7, characterized in that: The display driving device of the liquid crystal display screen also includes: The first prompt unit is used to send a special pattern to the display area to prompt that the display data is abnormal after the host fails to reset the LVDS data transmission for more than a specified time.

9. A display driving device for a liquid crystal display screen, using the display driving method for a liquid crystal display screen according to any one of claims 4 to 6, characterized in that: include: A second detection unit is used to perform real-time detection on LVDS data transmission and obtain a data state of the LVDS data transmission; A second storage unit, used for storing display data transmitted from the host; The second writing unit is used to continue to scan the display area in the normal direction when the data state is abnormal, continue to read the current frame display data from the second storage unit, continue to write the current frame display data, and feed back the information of the abnormal data state to the host.

10. The display driving device of a liquid crystal display screen according to claim 9, characterized in that: The display driving device of the liquid crystal display screen also includes: The second prompting unit is used to send a special pattern to the display area to prompt that the display data is abnormal after the host fails to reset the LVDS data transmission for more than a specified time.

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