Method, device and display device for improving display defects of display panel

Abstract

Embodiments of the present invention provide a method, apparatus, and display device for improving display defects in a display panel. Each frame of an image includes a pre-charge area, a display area, and a blank area arranged sequentially. The method for improving display defects includes: controlling the first line of data output by the pre-charge area of ​​the current frame of the image to be the last line of data of the blank area of ​​the previous frame of the image; controlling other lines of data output by the pre-charge area of ​​the current frame of the image to be the first line of data of the display area of ​​the current frame of the image; controlling the display area of ​​the current frame of the image to output display data; and controlling the data output by the blank area of ​​the current frame of the image to be the last line of data of the display area of ​​the current frame of the image. Embodiments of the present invention can avoid bright and dark lines on the display panel, improving the display quality and product yield of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a method, apparatus, and display device for improving display defects in display panels. Background Technology

[0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display) is currently the mainstream flat panel display technology, widely used in various electronic devices such as televisions, monitors, laptops, and mobile terminals. In the actual production and use of TFT-LCDs, bright and dark lines on the top edge are common defects that significantly impact display quality. The "top edge" of a TFT-LCD panel typically refers to the area far from the driving circuitry. Because this area is far from the driving circuitry, the signal transmission path is longer, making it susceptible to signal attenuation, voltage fluctuations, and other factors, resulting in uneven brightness or color. Bright lines appear as continuously bright lines in this area, while dark lines are continuously dark lines. These lines may appear as one or more, varying in brightness, leading to a decrease in product yield, increased production costs, and negatively impacting the screen's display effect and visual experience, significantly affecting product performance and market competitiveness. Summary of the Invention

[0003] In order to improve at least some of the shortcomings or deficiencies in the prior art, embodiments of the present invention provide a method, apparatus and display device for improving display defects in a display panel, avoiding bright and dark lines on the display panel, and improving the display quality and product yield of the display panel.

[0004] This invention provides a method for improving display defects in a display panel. Each frame of an image includes a pre-charge area, a display area, and a blank area arranged sequentially. The method for improving display defects includes: controlling the first line of data output by the pre-charge area of ​​the current frame of the image to be the last line of data of the blank area of ​​the previous frame of the image; controlling the other lines of data output by the pre-charge area of ​​the current frame of the image to be the first line of data of the display area of ​​the current frame of the image; controlling the display area of ​​the current frame of the image to output display data; and controlling the data output by the blank area of ​​the current frame of the image to be the last line of data of the display area of ​​the current frame of the image.

[0005] In some embodiments, while controlling the first line of data output from the pre-charge area of ​​the current frame image to be the last line of data from the blank area of ​​the previous frame image, the method further includes: controlling the image control chip to read the first line of data from the display area of ​​the current frame image.

[0006] In some embodiments, the method further includes: controlling the data output by the pre-charged region of the first frame of the image to be the first row of data of the display area of ​​the first frame of the image.

[0007] In some embodiments, a voltage polarity reversal position is set in the latter half of the row range of the blank area.

[0008] In some embodiments, the polarity reversal position is set within the interval of the 50% to 90% row of the blank area.

[0009] Another embodiment of the present invention provides an apparatus for improving display defects of a display panel, comprising: a first control module for controlling the first line of data output by the pre-charge area of ​​the current frame image to be the last line of data of the blank area of ​​the previous frame image; a second control module for controlling other lines of data output by the pre-charge area of ​​the current frame image to be the first line of data of the display area of ​​the current frame image; a third control module for controlling the display area of ​​the current frame image to output display data; and a fourth control module for controlling the data output by the blank area of ​​the current frame image to be the last line of data of the display area of ​​the current frame image.

[0010] In some embodiments, the image further includes: a first acquisition module, configured to acquire the last row of data in the blank area of ​​the previous frame of the image; a second acquisition module, configured to acquire the first row of data in the display area of ​​the current frame of the image; and a third acquisition module, configured to acquire the last row of data in the display area of ​​the current frame of the image.

[0011] In some embodiments, it further includes: a polarity control module, used to control the polarity reversal position to be set in the latter half of the row area of ​​the blank area.

[0012] In some embodiments, the polarity control module is used to control the polarity reversal position to be set in the 50% to 90% row of the blank area.

[0013] Another embodiment of the present invention provides a display device, including: a display panel and the above-described device for improving display defects of the display panel connected to the display panel.

[0014] As can be seen from the above, the technical features of the present invention can have one or more of the following beneficial effects: by associating the output data of the pre-charge area of ​​the current frame image with the last data of the blank area of ​​the previous frame image and the first data of the display area of ​​the current frame image, and associating the output data of the blank area of ​​the current frame image with the last row of data of the display area of ​​the current frame image, the voltage change at the boundary between the image display area and the blank area and the boundary between the pre-charge area and the display area is eliminated, the data change during frame switching is reduced, thereby improving the problem of bright and dark lines on the sky side. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram illustrating the relationship between the reference voltage and the voltage.

[0017] Figure 2 This is a flowchart of a method for improving display defects in a display panel, provided as an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram illustrating data, POL, and VCOM between different frames.

[0019] Figure 4 This is a schematic diagram of a display device according to another embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of a device for improving display defects in a display panel, provided in another embodiment of the present invention.

[0021] Figure label: 10. Display device; 100. Device for improving display defects of display panel; 110. First control module; 120. Second control module; 130. Third control module; 140. Fourth control module; 200. Display panel. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] During frame switching in a TET-LCD display panel, the blanking area, as an invisible region for signal and data switching, does not directly display images but significantly impacts the display quality of the next frame's active area (especially the top edge). The pre-data enabled area is used to complete data stabilization and pre-charging operations before the actual display of the active image (display area) begins. Traditionally, the reference voltage is reset or fixed grayscale data is output in the blanking area, and fixed grayscale data is output in the pre-charging area for pre-charging. While this can unify the data reference and complete pre-charging to some extent, the lack of correlation between the blanking area voltage data and the voltage data of the display areas in the preceding and following frames, as well as the lack of correlation between the pre-charging area and the display area data, leads to abrupt data jumps at the boundaries of the pre-charging area, display area, and blanking area. This affects the charging uniformity of the first line of the display area and the stability of the reference voltage (VCOM), still resulting in bright and dark lines.

[0024] This invention provides a method for improving display defects in a display panel. Specifically, for the frame switching process of a TET-LCD display panel, it optimizes the data output of the pre-charge area, display area, and blank area, thereby improving bright and dark line issues. See details below. Figure 2 and Figure 3 Each frame of the image includes a pre-filled area, a display area, and a blank area arranged in sequence. The above-mentioned method for improving display panel defects includes the following steps: S10, control the first row of data output from the pre-filled region of the image in the current frame to be the last row of data from the blank region of the image in the previous frame; S20, control the other rows of data output by the pre-filled area of ​​the image in the current frame to be the first row of data of the display area of ​​the image in the current frame; S30, control the display area of ​​the image in the current frame to output display data; and S40, control the data output of the blank area of ​​the image in the current frame to be the last line of data of the display area of ​​the image in the current frame.

[0025] Step S10 ensures a smooth transition of data between the pre-filled area of ​​the current frame and the blank area of ​​the previous frame, avoiding the impact of data mutations on VCOM.

[0026] Step S20 ensures that the first row of pixels in the current frame image display area is fully charged, avoiding abnormal charging of the first row of pixels in the current frame image display area, and reducing data mutations during frame switching. Steps S10 and S20 not only ensure that the first row of data in the display area is fully displayed, but also effectively reduce data mutations during frame switching and avoid abnormal charging of the first row, thus significantly improving the problem of bright and dark lines on the top side.

[0027] Step S40 ensures a smooth transition of data between the display area and the blank area, so that the output of each output module does not change significantly, the hardware noise generated by data and output is minimized, the data abrupt change at the boundary between the display area and the blank area is eliminated, voltage disturbance is reduced, and the complete display of the display area is improved.

[0028] Steps S10, S20, S30, and S40 associate the output data of the pre-charge area of ​​the current frame image with the last data of the blank area of ​​the previous frame image and the first data of the display area of ​​the current frame image, and associate the output data of the blank area of ​​the current frame image with the last row of data of the display area of ​​the current frame image. This eliminates voltage abrupt changes at the boundaries between the image display area and the blank area, as well as between the pre-charge area and the display area. By smoothing the data voltage transition, the peak value of the drive current is reduced, system noise and electromagnetic interference (EMI) are improved, the display integrity of the display area is improved, and the product yield of the display quality is improved, thereby significantly improving the problem of bright and dark lines on the top side.

[0029] Furthermore, the data mentioned above refers to voltage, that is, voltage is a concrete representation of image data within the LCD panel. Specifically, such as... Figure 3 As shown, the dashed line 'a' represents the first row of data in the pre-charge area, while the thick lines in the figure represent the data, i.e., voltage values, in different areas.

[0030] In some embodiments, step S30, while controlling the first row of data output from the pre-charge region of the current frame image to be the last row of data from the blank area of ​​the previous frame image, also includes controlling the image control chip to read the first row of data from the display area of ​​the current frame image. By preloading the first row of data from the display area, the charging safety of the first row of pixels in the display area is ensured, avoiding issues such as bright and dark lines on the top side. Reading the first row of data from the display area of ​​the current frame image while simultaneously outputting the first row of data from the pre-charge region also reduces waiting time and improves efficiency.

[0031] In some embodiments, the method for improving display defects of the display panel further includes: controlling the data output by the pre-charge area of ​​the first frame of the image to be the first row of data of the display area of ​​the first frame of the image. In the first frame of the image after the display panel is started or reset, since there is no data from the previous frame for reference, the first step of the pre-charge area data output, and the image control chip is reading the first row of data of the first frame display area, cannot simultaneously output this data. Therefore, the first row of data in the pre-charge area outputs black screen data. From then on, the image control chip has completely read the data and outputs the first row of data of the first frame display area for pre-charge, ensuring that the first row of pixels in the first frame can obtain accurate voltage when entering the display area, ensuring normal charging of the first row.

[0032] When the TFT-LCD is operating normally, it is switched between positive and negative polarity by a polarity reversal signal. The reference voltage (VCOM) is then affected by the data voltage with a large difference in polarity and is pulled away from its normal value. Figure 1 As shown. Improper polarity reversal settings can easily lead to step changes in the data's effect on VCOM, thereby affecting the display integrity of the display area.

[0033] like Figure 3 As shown in the figure, the method for improving display defects in a display panel provided by this embodiment of the invention further includes setting a voltage polarity reversal position in the latter half of the row range of the blank area. In the figure, dashed line b represents the 50% row of the blank area, and dashed line c represents the 90% row of the blank area. For example, the entire blank area can be considered as 100% of the row, and the position can be determined as the 50% row or the 90% row. The POL signal (polarity reversal signal) is used to control the periodic reversal of the voltage polarity (positive or negative voltage) applied to the liquid crystal pixels. Setting the voltage polarity reversal prevents the liquid crystal material from solidifying due to prolonged application of a single polarity voltage, while also improving display quality. VCOM is the common electrode reference voltage of the TFT-LCD, serving as the axis of symmetry of the data voltage and the grayscale reference zero point. Its stability determines display uniformity, anti-crosstalk capability, and long-term reliability. Performing voltage polarity reversal in the latter half of the row range of the blank area can reduce the impact of data step jumps on the reference voltage (VCOM), ensure the display integrity of the display area, and avoid the impact of polarity reversal on the normal display of the previous and next frame images.

[0034] In some embodiments, the polarity reversal position is set within the range of the 50% to 90% row of the blank area to ensure optimal display panel performance. If the polarity reversal position is set within the range of the 0th to 50th row of the blank area, it is close to the display area. Sudden voltage changes within the display area could affect the POL's flip position, potentially impacting normal display. If the polarity reversal position is set within the range of the 90% to 100% row, fluctuations in the preceding signal or power input could cause fluctuations in the blank area. When the blank area shortens due to these fluctuations, the POL may flip in the pre-charge area or display area of ​​the next frame, thus affecting normal display in the next frame.

[0035] Furthermore, the 50% to 90% row interval of the aforementioned blank area, that is, the 50% to 90% row positions between the minimum display area data amount of each frame image and the minimum data amount of each frame image, specifically, when the minimum display area data amount of each frame is 2160 and the minimum data amount of each frame is 2200, the polarity reversal position is preferably set between 2180 and 2196.

[0036] See Figure 4 The method for improving display defects in a display panel provided in this embodiment of the invention can be applied, for example, to a display device 10. The display device 10 may include, for example, a display panel 200 and a device 100 for improving display defects connected to the display panel 200. The display panel 200 is used to display images. The time between the start of displaying the current frame and the start of displaying the next frame is one frame duration. Each frame includes a pre-fill area, a display area, and a blank area. The device 100 for improving display defects can be, for example, a controller used to control the display of the display panel 200.

[0037] See Figure 5 Another embodiment of the present invention provides an apparatus 100 for improving display defects in a display panel. The apparatus 100 for improving display defects in a display panel may include, for example, a first control module 110, a second control module 120, a third control module 130, and a fourth control module 140.

[0038] The first control module 110 is used to control the first row of data output by the pre-filled region of the current frame image to be the last row of data of the blank region of the previous frame image; The second control module 120 is used to control the other rows of data output by the pre-filled area of ​​the image in the current frame to be the first row of data of the display area of ​​the image in the current frame; The third control module 130 is used to control the display area of ​​the image in the current frame to output display data; The fourth control module 140 is used to control the data output in the blank area of ​​the image in the current frame to be the last line of data in the display area of ​​the image in the current frame.

[0039] In some embodiments, the apparatus 100 for improving display defects of a display panel may further include, for example, a first acquisition module, a second acquisition module, and a third acquisition module.

[0040] The first acquisition module is used to acquire the last row of data in the blank area of ​​the previous frame of the image; The second acquisition module is used to acquire the first row of data of the display area of ​​the image in the current frame; The third acquisition module is used to acquire the last row of data in the display area of ​​the image in the current frame.

[0041] In some embodiments, the apparatus 100 for improving display defects of a display panel may, for example, further include a polarity control module, which controls the polarity reversal position to be set in the latter half of the blank area. Further, the polarity control module controls the polarity reversal position to be set in the 50% to 90% row of the blank area.

[0042] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or device.

[0043] Furthermore, it is understood that the foregoing embodiments are merely illustrative examples of the present invention. Provided that the technical features do not conflict, the structure is not contradictory, and the purpose of the present invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used.

[0044] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for improving display defects in a display panel, characterized in that, Each frame of the image includes a pre-filled area, a display area, and a blank area arranged in sequence; the method for improving display panel defects includes: The first line of data output by the pre-filled region of the image in the current frame is controlled to be the last line of data of the blank region of the image in the previous frame; The other rows of data output by the pre-filled area of ​​the image in the current frame are controlled to be the first row of data of the display area of ​​the image in the current frame; Control the display area of ​​the image in the current frame and output display data; and The data output to the blank area of ​​the image in the current frame is the last line of data in the display area of ​​the image in the current frame.

2. The method for improving display defects in a display panel as described in claim 1, characterized in that, While controlling the first line of data output in the pre-fill region of the current frame of the image to be the last line of data in the blank region of the previous frame of the image, it also includes: The image control chip reads the first line of data from the display area of ​​the image in the current frame.

3. The method for improving display defects in a display panel as described in claim 1, characterized in that, Also includes: The data output by the pre-charged area of ​​the first frame of the image is the first row of data of the display area of ​​the first frame of the image.

4. The method for improving display defects in a display panel as described in claim 1, characterized in that, The polarity of the voltage is reversed in the second half of the row interval of the blank area.

5. The method for improving display defects in a display panel as described in claim 4, characterized in that, The polarity reversal position is set within the interval from the 50th row to the 90th row of the blank area.

6. An apparatus for improving display defects in a display panel, characterized in that, include: The first control module is used to control the first row of data output by the pre-filled region of the current frame image to be the last row of data of the blank region of the previous frame image; The second control module is used to control the other rows of data output by the pre-filled area of ​​the image in the current frame to be the first row of data of the display area of ​​the image in the current frame; The third control module is used to control the output of display data in the display area of ​​the image in the current frame; as well as The fourth control module is used to control the data output in the blank area of ​​the image in the current frame to be the last line of data in the display area of ​​the image in the current frame.

7. The apparatus for improving display defects of a display panel as described in claim 6, characterized in that, Also includes: The first acquisition module is used to acquire the last row of data in the blank area of ​​the previous frame of the image; The second acquisition module is used to acquire the first row of data of the display area of ​​the image in the current frame; as well as The third acquisition module is used to acquire the last row of data in the display area of ​​the image in the current frame.

8. The apparatus for improving display defects of a display panel as described in claim 6, characterized in that, Also includes: The polarity control module is used to control the polarity reversal position to be set in the latter half of the blank area.

9. The apparatus for improving display defects of a display panel as described in claim 8, characterized in that, The polarity control module is used to control the polarity reversal position to be set in the 50% to 90% row of the blank area.

10. A display device, characterized in that, include: The display panel and the apparatus for improving display defects of the display panel as described in any one of claims 6-9, connected to the display panel.

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