Display module, display device and image correction method

Abstract

The invention provides a display module, a display device and an image correction method. The image correction method comprises the following steps: detecting stretching information of a stretchable display panel based on a detection module and feeding back the stretching information to a pixel mapping selection module; the pixel mapping selection module responds to the received stretching information to obtain a first instruction and outputs the first instruction to the control module; and the control module responds to the first instruction to generate a second instruction to correct the pixel units, and drives the selected pixel units. According to the method, image distortion caused by position dislocation of the pixel units after the stretchable display panel is stretched can be eliminated.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module, a display device, and an image correction method. Background Art

[0002] Flexible display panels are gaining more and more attention due to their advantages such as foldability, portability and wide application range, especially stretchable display panels, which bring users a new viewing and usage experience. However, during the stretching process of existing stretchable display panels, the spacing between pixel units will change, causing the originally normal displayed image to be distorted during display, affecting the user experience. Summary of the invention

[0003] In view of this, the purpose of the present disclosure is to provide a display module, a display device and an image correction method. The method corrects the distorted image.

[0004] Based on the above objectives, the present disclosure provides a display module, which includes:

[0005] A stretchable display panel comprising a plurality of regularly arranged pixel units, wherein the pixel units are electrically connected to a control module;

[0006] A detection module, which is used to measure the stretching information of the stretchable display panel and feed back the measurement result to the pixel mapping selection module;

[0007] The pixel mapping selection module receives the measurement result and feeds back the pixel mapping model corresponding to the stretched pixel unit and the unstretched pixel unit to the control module in response to the measurement result;

[0008] The control module receives and responds to the pixel mapping model to drive the selected pixel unit. After the stretchable display panel is stretched, the spacing between the pixel units also changes, and the position of the pixel unit may be misaligned with that before stretching. In this way, for displaying the same pattern, the position of the pixel unit changes after stretching, and when the pixel unit before stretching is still driven, the pattern is distorted. The deformation of the stretching is detected by the detection module, and the corresponding model of the pixel unit before and after stretching is established based on the degree of stretching, and the pixel unit is adjusted. In this way, the control module drives the adjusted pixel unit to eliminate image distortion. At the microscopic level, the image is composed of a combination of lit pixel units.

[0009] In one embodiment, the stretchable display panel includes a substrate, a driving array is disposed on the substrate, the driving array is electrically connected to a control module, and the control module drives the corresponding pixel units through the driving array.

[0010] In one of the embodiments, the stretching information includes a stretching length or a stretching position.

[0011] In one of the embodiments, the pixel mapping selection module includes a mapping table between pixel units of the stretchable display panel after stretching and pixel units of the stretchable display panel before stretching.

[0012] Based on the same inventive concept, the present disclosure also discloses an image correction method, which is used to correct an image displayed when a display module is running, and the method comprises the following steps:

[0013] Based on the stretching information of the stretchable display panel detected by the detection module, the stretching information is fed back to the pixel mapping selection module;

[0014] The pixel mapping selection module obtains a first instruction in response to the received stretching information and outputs the first instruction to the control module;

[0015] The control module responds to the first instruction to generate a second instruction to perform pixel unit calibration and drive the selected pixel unit.

[0016] In one embodiment, the stretching information of the stretchable display panel is detected by the detection module and fed back to the pixel mapping selection module, including: the stretching information including the stretching length or the position information after stretching is detected by the detection module and fed back to the pixel mapping selection module. Further, the pixel mapping selection module obtains the corresponding mapping model between the pixel unit in the current stretching state and the pixel unit in the non-stretching state based on the stretching length and according to a preset model and sends a first instruction to the control module, and the control module generates a second instruction based on the first instruction to adjust the pixel unit.

[0017] In one embodiment, the detecting module detects the stretching information of the stretchable display panel and feeds it back to the pixel mapping selection module, comprising:

[0018] The stretching of the stretchable display panel is verified by using a sensing component, and a mapping correspondence model between the stretched pixel unit and the unstretched pixel unit of each interval segment is established according to each interval segment.

[0019] In one embodiment, along the stretching direction, the initial length of each interval segment may be the same or different.

[0020] In one embodiment, whether the display module is stretched is detected based on a sensing component. If it is detected that the display module is not stretched, normal display is performed.

[0021] Based on the same inventive concept, the present disclosure also discloses a display device, which includes a display module,

[0022] The display module includes a stretchable display panel,

[0023] When the stretchable display panel is stretched, the image correction method as described above is performed. The display device can operate in a stretched state or in a normal state (unstretched). In this embodiment, the detection module is configured in the display module. In other embodiments, the detection module can also be configured in the display module, which is used to measure the stretching information of the stretchable display panel.

[0024] Compared with the prior art, the image correction method provided by the present invention is based on a detection module that detects the stretching degree of a stretchable display panel and feeds back to a pixel mapping selection module. The pixel mapping selection module selects the corresponding model of the pixel unit before / after stretching based on the stretching depth. The control module drives the adjusted pixel unit to reduce or eliminate image distortion and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of a row of light displays on a stretchable display panel when not stretched according to an embodiment of the present disclosure.

[0027] Figure 2 for Figure 1 Schematic diagram of the stretchable display panel after stretching.

[0028] Figure 3 The figure is a flowchart of image correction according to an embodiment of the present disclosure.

[0029] Figure 4 This is a schematic diagram of a pattern displayed by a stretchable display panel when not stretched according to an embodiment of the present disclosure.

[0030] Figure 5 for Figure 4 Schematic diagram of a display pattern after stretching of an embodiment.

[0031] Figure 6 for Figure 4 Schematic diagram of a display pattern after correction after stretching of an embodiment. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] During the stretching process of the stretchable display panel (also called the screen body), the spacing between pixel units will change (the arrangement position of the pixel units changes after stretching), causing the screen body to still display in the same way as the initial state (when not stretched) after stretching, and the displayed pattern will be distorted.

[0035] The reason is that when the pattern is displayed before stretching (when the screen is in the initial state), Figure 1 As shown, a column of pixel units 11 in the stretchable display panel is lit (a plurality of pixel units 10 arranged in an array, wherein the pixel unit selected during display is represented by the pixel unit 11), after the pixel unit is stretched, the arrangement position of the pixel unit changes, and the pattern in the initial state is still displayed. At this time, due to the change in the position of the pixel unit, the spacing between the pixel units also changes (at this time, the spacing between the pixel units has an equal spacing change or an unequal spacing change), and the lit pixel unit 21 (see FIG. 21 ) that should have been displayed on the same column Figure 1 ), the arrangement position of the pixel unit 11 changes due to the stretching, and the pixel unit 11 in the initial state is still selected according to the previous driving method. At this time, the pattern is as follows Figure 2 As shown, the pattern displayed after stretching is distorted.

[0036] To this end, the applicant has improved the existing stretchable display panel and proposed an image correction method, by which the image displayed by the stretchable display panel of the display module will not be distorted even after the stretchable display panel of the display module is stretched. At the same time, the stretchable display panel of the display module displays in a normal manner in the initial state (when not stretched).

[0037] The present application proposes a display module, which includes a detection module, a control module (also called a driving module) and a stretchable display panel.

[0038] The stretchable display panel includes a plurality of regularly arranged pixel units (also referred to as pixels), the control module is electrically connected to the pixel units and controls to light up the selected pixel units based on instructions, and the combination of the lighted pixel units constitutes a preset image (such as a pattern or text or character or number, etc.). Preferably, the control module is electrically connected to the pixel units to match the corresponding driving circuit, and the driving circuit is configured on the substrate of the stretchable display panel.

[0039] The detection module is used to measure the stretching length of the stretchable display panel and feed back the measurement result to the control module. The control module selects the corresponding pixel mapping relationship based on the feedback length information (the pixel mapping relationship may be different for different stretching degrees) for correction. In this embodiment, the mapping relationship can be obtained in advance by performing a stretching test on the screen, and then a pixel mapping model is constructed based on this data. For the image source, the pixel unit selected in the initial state (the initial selected pixel unit) can be obtained in advance (such as obtained by programming). After being stretched, the image source is based on the initial selected pixel unit and combined with the pixel mapping model to adjust the misplaced pixel unit / pixel to process the image source so that the pixel unit misplaced due to the stretching position is corrected to avoid image display distortion.

[0040] The stretchable display panel has a substrate made of polyimide, a driving array (composed of regularly arranged TFT transistors) is configured on the substrate, and pixel units are arranged on the driving array. The driving array drives and matches corresponding pixel units (also called pixels), and each pixel unit includes red / green / blue sub-pixels. In other embodiments, the substrate may have other materials such as polyvinyl alcohol (PVA), polyester (PET), polyethylene naphthalate (PEN), paper, textile materials, etc.

[0041] In one embodiment, the initial length (also called inherent length) of the stretchable display panel is L1, the stretching limit value after stretching is L2, the stretched length L of the stretchable display panel (also called screen body) is L=L2-L1, and the stretched length L is set to M intervals (the M intervals along the stretching direction can be set at equal intervals or unequal intervals). Preferably, the principle of setting the intervals is that after the screen body is stretched to a new interval, the positional relationship between the pixels corresponding to the interval is updated compared to the pixel positional relationship of the previous interval (for example, the pixel units arranged in the array are stretched along the column direction (stretching along the row direction is similar and will not be repeated). Taking the nth row as an example, the pixels / pixel units corresponding to certain columns in the nth row are arranged to the n+1th row (the corresponding pixels originally in the n-1th row are moved to the nth row after stretching). When driving the nth row, it can be driven directly when it is not stretched. After stretching, it needs to be corrected (the pixels that have moved to the n+1th row after stretching are replaced with the pixels corresponding to the initially located n-1th row. For example The pixel units arranged in the array are stretched along the column direction. Taking the nth row as an example, the pixel units corresponding to some columns in the nth row are shifted to the n+2th row, and the pixel units originally in the n-2th row are shifted to the nth row after stretching; the display pattern needs to drive the nth row, which can be driven directly when not stretched. After stretching, correction is required, and the pixel units originally in the n-2th row need to be driven (the pixel units corresponding to this part are shifted to the nth row after stretching). In this way, a new pixel correspondence is determined in this interval, and the calibration of the displayed image can be realized when applied to avoid the problem of distorted images. At this time, it is equivalent to the overall elongation of the stretchable display panel to the stretching limit position.

[0042] As a variation of the above embodiment, in one embodiment, when the stretchable display panel is stretched, the stretching lengths on both sides along the stretching direction are different. The stretched display panel appears to be tilted to one side along the stretching direction (e.g., the stretchable display panel is rectangular in the initial state, and fan-shaped after being stretched).

[0043] Based on the same inventive concept, the present application provides a display device, which includes the above-mentioned display module. The display device can be a smart device or a VR device, etc. The display device can operate normally in a stretched state (displaying an undistorted pattern) or in an unstretched state. The display device displays based on a preset program. Preferably, the program of the display device can be adjusted (such as upgrading, replacing, etc.) through a programmable module. Preferably, a sensing component is provided on the display device, and the sensing component is used to detect whether the display module is stretched. If it is detected that the display module is not stretched, it is displayed normally. If it is detected that the display module is stretched, the above-mentioned image correction method is triggered for correction. Preferably, in one embodiment, the sensing component can be configured in the display module. Further, in one embodiment, based on the stretching degree of M intervals detected by the sensing component, the control module establishes a mapping correspondence between the stretched pixel unit and the pixel unit in the normal state (unstretched) for each interval, and the pixel mapping selection module reselects the pixel / pixel unit, so as to correct the pixel / pixel unit, so as to eliminate image distortion when displaying the pattern. In one embodiment, the display device further includes a sensing component, which detects whether the display module is stretched. If it is detected that the display module is not stretched, normal display is performed; if it is detected that the display module is stretched, an image correction method is triggered for correction.

[0044] Next, combine Figure 3 The image correction method based on the above display module is described, and the method comprises the following steps:

[0045] Based on the stretching information of the stretchable display panel detected by the detection module, the stretching information is fed back to the pixel mapping selection module;

[0046] The pixel mapping selection module obtains a first instruction in response to the received stretching information and outputs the first instruction to the control module;

[0047] The control module responds to the first instruction to generate a second instruction to perform pixel unit correction and drive the selected pixel unit. Under this method, the detection module detects the length or position of the current screen stretch and feeds it back to the pixel mapping selection module. The pixel mapping selection module obtains the current stretching degree of the screen, selects the pixel mapping relationship corresponding to this stretching state and sends the first instruction to the control module. The control module selects the corresponding pixel (pixel unit) under the current mapping relationship based on the first instruction, generates a second instruction to adjust the pixel unit, and corrects the pixel unit (and then realizes the correction of the image combined with it). The mapping relationship can be obtained by pre-stretching the screen (a corresponding model (also called a mapping correspondence table) of the pixel unit before / after stretching under different stretching lengths / positions can be established, and the mapping correspondence table / corresponding model can be pre-stored in the pixel mapping selection module or pre-stored in the control module). This method can eliminate image distortion. Preferably, the pixel mapping selection module is integrated in the control module. The control module includes a storage unit, which can store a mapping correspondence table and a driver, and the driver is used to drive the stretchable display panel to present a preset pattern / image / image. The control module also includes an interface through which drivers are updated or switched.

[0048] The stretching information of the display panel detected by the detection module includes the length after stretching and the current position (stretching position).

[0049] In one embodiment, the detecting module detects the stretching information of the stretchable display panel and feeds it back to the pixel mapping selection module, comprising:

[0050] The stretching of the stretchable display panel is verified by using a sensing component, and a mapping correspondence model between the stretched pixel unit and the unstretched pixel unit of each interval segment is established according to each interval segment.

[0051] In one embodiment, along the stretching direction, the initial length of each interval segment may be the same or different.

[0052] In one embodiment, whether the display module is stretched is detected based on a sensing component. If it is detected that the display module is not stretched, normal display is performed.

[0053] In one embodiment, in combination Figure 4-Figure 6 To describe the image correction method.

[0054] The image that the stretchable display panel can display in the unstretched state (initial state) is shown as follows: Figure 4As shown, the stretchable display panel 100 includes pixel units 110 (also called pixels) arranged in a row, each pixel unit includes red / green / blue sub-pixels (not shown). In the initial state, the stretchable display panel 100 displays a pattern 200. The pattern 200 is composed of a plurality of pixel units 110 that are lit. If the spacing between the pixel units that are lit after the stretchable display panel 100 is not corrected, the combined pattern 200 will be distorted (distorted). Figure 5 The distorted image seriously affects the user experience. Therefore, image processing is required. After processing (also called correction), the displayed image 300 is as shown in FIG. Figure 6 As shown, the pattern looks the same at this time, and its combined pixel units have been adjusted. In the initial state, the control module (also called the driving module) drives the pixel units to work (emit light) based on a preset program, and the combination of pixel units constitutes a display pattern. After stretching, the pixel units that should have been displayed in the same column are not displayed in the same column due to the effect of the stretching force. The control module corrects and adjusts according to the degree of stretching (such as correcting the originally misaligned pixels / pixel units by processing the image source), so as to avoid distortion of the displayed pattern.

[0055] In one embodiment, the method further includes using a sensing unit / component to verify and record the stretching degree of the screen in sections (constructing a corresponding model of the pixel unit before / after stretching (also called a mapping correspondence table)). In this step, the screen is preset with M intervals (M is a natural number) along the stretching direction. According to the stretching length (deformation) of each interval (interval segment), a mapping correspondence table (mapping correspondence model) between the stretched pixel unit and the pixel unit in the normal state (when not stretched) is established. Preferably, the mapping table of the pixel unit after stretching and the pixel unit when not stretched may be different for different stretching degrees. The mapping table can be set one by one according to the interval. Preferably, the initial lengths of the M intervals may be the same. In other embodiments, the initial lengths of the M intervals may be different (such as gradually increasing, gradually decreasing or gradually changing from one side to the other side), depending on the application scenario. For a stretchable display panel, the deformation amounts on both sides and the middle may be asynchronous when being stretched (that is, the spacing between the pixel units may not change in equal proportion (along the stretching direction)). Preferably, the number of M intervals is set such that when the screen is stretched to a new interval segment, the positional relationship between pixels corresponding to the interval segment is updated compared to the pixel positional relationship of the previous interval segment.

[0056] In one embodiment, the pixel mapping selection module selects the corresponding pixels (pixel units) under the current mapping relationship based on the first instruction to correct the original pixels, including lighting up the reselected pixels / pixel units based on the first instruction and based on the mapping correspondence table, thereby correcting the image.

[0057] While the disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0058] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

[0059] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0060] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display module, characterized in that: include: A stretchable display panel comprising a plurality of regularly arranged pixel units, wherein the pixel units are electrically connected to a control module; A detection module, which is used to measure the stretching information of the stretchable display panel and feed back the measurement result to the pixel mapping selection module; The pixel mapping selection module receives the measurement result and feeds back the pixel mapping model corresponding to the stretched pixel unit and the unstretched pixel unit to the control module in response to the measurement result; The control module receives and responds to the pixel mapping model to drive the selected pixel unit.

2. The display module according to claim 1, wherein: The stretchable display panel includes a substrate, a driving array is disposed on the substrate, the driving array is electrically connected to a control module, and the control module drives the corresponding pixel units through the driving array.

3. The display module according to claim 1, wherein: The stretching information includes the stretching length or the position after stretching.

4. The display module according to claim 1, wherein: The pixel mapping selection module includes a mapping correspondence table between pixel units of the stretchable display panel after stretching and pixel units of the stretchable display panel before stretching.

5. An image correction method, which is used to calibrate the image displayed when the display module is running, characterized in that: The method comprises the following steps: Based on the stretching information of the stretchable display panel detected by the detection module, the stretching information is fed back to the pixel mapping selection module; The pixel mapping selection module obtains a first instruction in response to the received stretching information and outputs the first instruction to the control module; The control module responds to the first instruction to generate a second instruction to perform pixel unit calibration and drive the selected pixel unit.

6. An image correction method as claimed in claim 5, characterized in that: The detecting module detects the stretching information of the stretchable display panel and feeds it back to the pixel mapping selection module, including: detecting the stretching information including the stretching length or the position information after stretching, and feeding it back to the pixel mapping selection module based on the detection module.

7. An image correction method as claimed in claim 6, characterized in that: Also includes: The pixel mapping selection module obtains a corresponding mapping model between a pixel unit in a current stretched state and a pixel unit in a non-stretched state based on the stretched length and a preset model and sends a first instruction to a control module. The control module generates a second instruction based on the first instruction to adjust the pixel unit.

8. An image correction method as claimed in claim 5, characterized in that: The method of detecting the stretching information of the stretchable display panel based on the detection module and feeding back the information to the pixel mapping selection module comprises: The stretching of the stretchable display panel is verified by using a sensing component, and a mapping correspondence model between the stretched pixel unit and the unstretched pixel unit of each interval segment is established according to each interval segment.

9. An image correction method as claimed in claim 8, characterized in that: Along the stretching direction, the initial length of each interval segment may be the same or different.

10. A display device, characterized in that: include: Display module, The display module includes a stretchable display panel. When the stretchable display panel is stretched, the image correction method as described in any one of claims 5 to 9 is performed.

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