Global contrast adjustment method and device, display chip, display equipment and electronic equipment
Through the quasi-S-shaped curve mapping relationship based on quasi-degree polynomial, the contrast adjustment of the display pixel points is solved, and the fracture/fault problem is achieved during global contrast adjustment, and the efficient display effect is achieved and the hardware cost is reduced.
Patent Information
- Application Number
- CN202510287100.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-07-08
AI Technical Summary
In the prior art, the global contrast adjustment method is affected by the size of the lookup table, resulting in fracture/fault phenomenon of display images, affecting the display effect.
Using a quasi-S-shaped curve mapping relationship based on quadratic polynomials, the initial pixel value of each pixel point in the displayed image is adjusted in contrast, the target pixel value is determined, and the pixel adjustment circuit includes a shift register, a multiplier and an adder for hardware implementation.
The image fracture/fault phenomenon after global contrast adjustment is avoided, the visual effect of the display device is ensured, and the cost investment in hardware implementation is reduced.
Smart Images
Figure CN120279827A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of LCD display, and in particular to a global contrast adjustment method, apparatus, display chip, display device, and electronic device. Background Art
[0002] Global contrast adjustment can make the gray levels of the images presented by the display distinct and the picture details clearer. Global contrast stretching based on the S-shaped curve is a commonly used global contrast adjustment method in the prior art. Generally, for the convenience of hardware implementation, the S-shaped curve mapping relationship can be stored through a look-up table (LUT), and the global mapping of the S-shaped curve is implemented by combining the LUT table with an interpolation scheme. However, the mapping performance is affected by the LUT size. When the LUT size is small, banding often occurs at the stored pixel nodes, affecting the display effect. Summary of the Invention
[0003] In view of this, the present disclosure proposes a technical solution for a global contrast adjustment method, apparatus, display chip, display device, and electronic device.
[0004] According to one aspect of the present disclosure, there is provided a global contrast adjustment method, including: determining an initial pixel value corresponding to each pixel point in the to-be-displayed image; for any pixel point in the to-be-displayed image, performing contrast adjustment on the initial pixel value corresponding to the pixel point by using a pseudo S-shaped curve mapping relationship based on a quadratic polynomial to determine a target pixel value corresponding to the pixel point; and driving a target display device to output a display result corresponding to the to-be-displayed image according to the target pixel value corresponding to each pixel point, where the global contrast of the display result is higher than the global contrast of the to-be-displayed image.
[0005] In a possible implementation manner, the pseudo S-shaped curve mapping relationship based on the quadratic polynomial is:
[0006]
[0007] where x represents an initial pixel value corresponding to any pixel point, y represents a target pixel value corresponding to the pixel point, f(x) represents the result of the first quadratic polynomial operation, g(x) represents the result of the second quadratic polynomial operation, and α1, α2, α3, k1, and k2 represent preset operation coefficients.
[0008] In a possible implementation, for any pixel point in the image to be displayed, the initial pixel value corresponding to the pixel point is contrast-adjusted by using a pseudo S-shaped curve mapping relationship based on a quadratic polynomial to determine the target pixel value corresponding to the pixel point, including: for any pixel point in the image to be displayed, inputting the initial pixel value corresponding to the pixel point into a preset pixel adjustment circuit for data operation of the pseudo S-shaped curve to determine the target pixel value corresponding to the pixel point, where the pixel adjustment circuit includes: a first preset number of shift registers, a second preset number of multipliers, and four adders.
[0009] In a possible implementation, when the values of all preset operation coefficients are not powers of 2, the first preset number is equal to 0, and the second preset number is equal to 11.
[0010] In a possible implementation, when the value of at least one of the preset operation coefficients α1, α2, α3, k1, and k2 is a power of 2, the first preset number is equal to the number of preset operation coefficients whose values are powers of 2.
[0011] According to another aspect of the present disclosure, there is provided a global contrast adjustment device, including: a pixel value determination module for determining the initial pixel value corresponding to each pixel point in the image to be displayed; a pixel adjustment module for contrast-adjusting the initial pixel value corresponding to any pixel point in the image to be displayed by using a pseudo S-shaped curve mapping relationship based on a quadratic polynomial to determine the target pixel value corresponding to the pixel point; and a driving module for driving a target display device to output a display result corresponding to the image to be displayed according to the target pixel value corresponding to each pixel point, where the global contrast of the display result is higher than the global contrast of the image to be displayed.
[0012] In a possible implementation, the pixel adjustment module includes: a preset pixel adjustment circuit, and the pixel adjustment circuit includes: a first preset number of multipliers, a second preset number of shift registers, and four adders.
[0013] According to another aspect of the present disclosure, there is provided a display chip, which is used to implement the above global contrast adjustment method, or includes at least one of the above global contrast adjustment devices.
[0014] According to another aspect of the present disclosure, there is provided a display device, including a plurality of display units and at least one of the above global contrast adjustment devices, or at least one of the above display chips.
[0015] In a possible implementation, the display unit includes a display panel, and the display panel includes at least one of a liquid crystal display panel, a micro light-emitting diode display panel, a light-emitting diode display panel, a mini light-emitting diode display panel, a quantum dot light-emitting diode display panel, an organic light-emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electro-wetting display panel, and a small-pitch display panel.
[0016] According to another aspect of the present disclosure, an electronic device is provided, including the aforementioned display device.
[0017] In the embodiments of the present disclosure, for any pixel point in the image to be displayed, a quasi-S-shaped curve mapping relationship based on a quadratic polynomial can be used to adjust the contrast of the initial pixel value corresponding to the pixel point to determine the target pixel value corresponding to the pixel point. On the one hand, it can solve the problem of being restricted by the LUT size in the common contrast adjustment methods in the prior art from the source, avoid the fracture / fault phenomenon in the image after global contrast adjustment, and ensure the visual effect of the display device; on the other hand, compared with the standard S-shaped mapping relationship based on an exponential function, the quasi-S-shaped curve mapping relationship used in the present disclosure is convenient to be implemented by a hardware circuit, and can reduce the cost investment in the actual application scenario; according to the target pixel value corresponding to each pixel point, the target display device can be driven to output the display result corresponding to the image to be displayed, and ensure that the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
[0018] According to the following detailed description of exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present disclosure will become clear. Description of the Drawings
[0019] The drawings included in the specification and constituting a part of the specification, together with the specification, illustrate the exemplary embodiments, features, and aspects of the present disclosure, and are used to explain the principles of the present disclosure.
[0020] Figure 1 A flowchart showing a global contrast adjustment method according to an embodiment of the present disclosure;
[0021] Figure 2 A comparison diagram showing a quasi-S-shaped curve according to an embodiment of the present disclosure;
[0022] Figure 3 A schematic structural diagram showing a pixel adjustment circuit according to an embodiment of the present disclosure;
[0023] Figure 4 A block diagram showing a global contrast adjustment device according to an embodiment of the present disclosure. Detailed Embodiments
[0024] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. Like reference numerals in the drawings denote functionally identical or similar elements. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.
[0025] In the description of the present disclosure, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specifically defined.
[0027] In the present disclosure, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.
[0028] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" in this article means any one of a plurality or any combination of at least two of a plurality. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set composed of A, B, and C.
[0029] Global contrast adjustment can make the gray levels of the images presented by the display distinct and the details of the images clearer. Global contrast stretching based on an S-shaped curve is a commonly used global contrast adjustment method in the prior art. Generally, for the convenience of hardware implementation, the mapping relationship of the S-shaped curve can be stored through a look-up table (LUT), and the global mapping of the S-shaped curve can be implemented by combining the LUT with an interpolation scheme. However, the mapping performance is affected by the size of the LUT. When the size of the LUT is small, breakage / faulting (banding) often occurs in storing pixel nodes, affecting the display effect.
[0030] In view of this, the present disclosure proposes a global contrast adjustment method, which can implement a quasi-S-shaped curve mapping relationship based on a quadratic polynomial, solve the influence of the LUT size on global contrast adjustment from the source, avoid breakage / faulting in the image after global contrast adjustment, ensure the visual effect of the display device, and facilitate implementation through a hardware circuit. The global contrast adjustment method provided by the present disclosure is introduced in detail below.
[0031] Figure 1 The flowchart of a global contrast adjustment method according to an embodiment of the present disclosure is shown. As Figure 1 shown, the global contrast adjustment method can be executed by an electronic device such as a terminal device or a server. The terminal device can be a user equipment (UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (PDA), a handheld device, a computing device, a vehicle-mounted device, a wearable device, etc. The global contrast adjustment method can be implemented by a processor calling computer-readable instructions stored in a memory. Alternatively, the global contrast adjustment method can be executed by the server. As Figure 1 shown, the global contrast adjustment method includes:
[0032] In step S101, determine the initial pixel value corresponding to each pixel point in the image to be displayed.
[0033] In step S102, for any pixel point in the image to be displayed, use the quasi-S-shaped curve mapping relationship based on a quadratic polynomial to adjust the contrast of the initial pixel value corresponding to the pixel point, and determine the target pixel value corresponding to the pixel point.
[0034] In step S103, according to the target pixel value corresponding to each pixel point, drive the target display device to output the display result corresponding to the image to be displayed, where the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
[0035] Among them, the image to be displayed is any image that needs to be displayed on the target display device. Its specific form can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations thereon. The specific content of the initial pixel value corresponding to each pixel point in the image to be displayed may include the brightness value, chromaticity value, etc. in a preset color space, which can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations thereon.
[0036] The quasi-S-shaped curve mapping relationship based on a quadratic polynomial can represent the mapping relationship of simulating an S-shaped curve through multiple quadratic polynomial operations. Its specific form can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations thereon. The specific number of times of the quadratic polynomial operation can be flexibly set according to actual usage requirements. For example, the number of times of the quadratic term operation can be set to three, and the present disclosure does not make specific limitations thereon.
[0037] In a possible implementation manner, the quasi-S-shaped curve mapping relationship based on a quadratic polynomial can be expressed as formula (1):
[0038]
[0039] Among them, x represents the initial pixel value corresponding to any pixel point, y represents the target pixel value corresponding to this pixel point, f(x) represents the result of the first quadratic polynomial operation, g(x) represents the result of the second quadratic polynomial operation, and α1, α2, α3, k1, and k2 represent preset operation coefficients.
[0040] Specifically, for any pixel point, the initial pixel value x corresponding to this pixel point can be adjusted for the first time by using a quadratic polynomial operation to obtain the result f(x) of the first quadratic polynomial operation corresponding to this pixel point.
[0041] Among them, the process of the first adjustment can be expressed as formula (2):
[0042]
[0043] Among them, y1 represents the mapping result of the linear function under the coefficient k1; y2 represents the standard linear function mapping result.
[0044] Similarly, the initial pixel value x corresponding to this pixel point can be adjusted for the second time by using a quadratic polynomial operation to obtain the result g(x) of the second quadratic polynomial operation corresponding to this pixel point. Among them, the process of the second adjustment can be expressed as formula (3):
[0045]
[0046] Among them, y3 represents the linear function mapping result under the coefficient k2; y4 represents the standard linear function mapping result.
[0047] Based on the results f(x) of the first quadratic polynomial operation and the results g(x) of the second quadratic polynomial operation corresponding to the pixel point, a third adjustment can be performed using the quadratic polynomial operation to obtain the target pixel value y corresponding to the pixel point. Thus, through three quadratic polynomial operations, the simulation of the S-shaped curve mapping relationship is realized, and the quasi-S-shaped curve mapping relationship based on the quadratic polynomial shown in the above formula (1) is obtained.
[0048] Figure 2 A comparison schematic diagram of a quasi-S-shaped curve according to an embodiment of the present disclosure is shown. As Figure 2 shown, the light blue curve is the standard S-shaped curve based on the exponential function; the red curve is the curve corresponding to the standard linear function mapping; the yellow curve is the curve corresponding to the result f(x) of the first quadratic polynomial operation; the dark blue curve is the curve corresponding to the result g(x) of the second quadratic polynomial operation; the black surface is the curve corresponding to the quasi-S-shaped curve mapping relationship based on the quadratic polynomial provided by the present disclosure. It can be seen that the quasi-S-shaped curve mapping relationship based on the quadratic polynomial provided by the present disclosure has a good fitting effect on the standard S-shaped mapping relationship based on the exponential function.
[0049] Using the quasi-S-shaped curve mapping relationship based on the quadratic polynomial, the contrast of the initial pixel value corresponding to each pixel point in the image to be displayed can be adjusted to obtain the target pixel value corresponding to each pixel point, so as to drive the target display device to output the display result corresponding to the image to be displayed, and make the global contrast of the display result higher than the global contrast corresponding to the image to be displayed. Thus, during the image display process, the global contrast stretching of the image to be displayed is realized. On the other hand, compared with the standard S-shaped mapping relationship based on the exponential function, the quasi-S-shaped curve mapping relationship based on the quadratic polynomial provided by the present disclosure can be more simply implemented at the hardware level, so as to reduce the complexity of hardware implementation and cost investment while ensuring the effect of global contrast stretching.
[0050] Among them, for the specific method of contrast adjustment, reference can be made to the implementation methods in related technologies. For example, the brightness value corresponding to each pixel point in the middle tone of the image to be displayed can be adjusted, etc. The present disclosure does not make specific limitations thereto.
[0051] For the specific form of the target display device, reference can be made to the implementation manners in the related art. For example, it can be an electronic device such as a desktop computer, a television, a mobile device with a large-size screen like a mobile phone or a tablet computer, or a projection device, etc. The present disclosure does not make specific limitations thereto. The specific method for driving the target display device to output the display result corresponding to the image to be displayed by using the target pixel value corresponding to each pixel can be flexibly set according to actual usage requirements and depends on the specific form of the target display device. The present disclosure does not make specific limitations thereto.
[0052] In an embodiment of the present disclosure, for any pixel in the image to be displayed, a contrast adjustment can be performed on the initial pixel value corresponding to the pixel by using a quasi-S-shaped curve mapping relationship based on a quadratic polynomial to determine the target pixel value corresponding to the pixel. On the one hand, it can solve the problem that the common contrast adjustment method in the prior art is limited by the LUT size at the source, avoid the fracture / fault phenomenon in the image after global contrast adjustment, and ensure the visual effect of the display device; on the other hand, compared with the standard S-shaped mapping relationship based on an exponential function, the quasi-S-shaped curve mapping relationship based on a quadratic polynomial used in the present disclosure is convenient to be implemented by a hardware circuit, and can reduce the cost input in the actual application scenario; according to the target pixel value corresponding to each pixel, the target display device can be driven to output the display result corresponding to the image to be displayed, and ensure that the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
[0053] In a possible implementation manner, for any pixel in the image to be displayed, a contrast adjustment is performed on the initial pixel value corresponding to the pixel by using a quasi-S-shaped curve mapping relationship based on a quadratic polynomial to determine the target pixel value corresponding to the pixel, including: for any pixel in the image to be displayed, inputting the initial pixel value corresponding to the pixel into a preset pixel adjustment circuit for data operation of the quasi-S-shaped curve to determine the target pixel value corresponding to the pixel, where the pixel adjustment circuit includes: a first preset number of shift registers, a second preset number of multipliers, and 4 adders.
[0054] Compared with the standard S-shaped mapping relationship based on exponential functions, the quasi-S-shaped curve mapping relationship based on quadratic polynomials used in the present disclosure can be implemented by a pixel adjustment circuit including a first preset number of shift registers, a second preset number of multipliers, and 4 adders. The design difficulty and manufacturing difficulty at the hardware level are both relatively low, which can effectively reduce the input of human and material costs in actual application scenarios. Among them, the specific values of the first preset number and the second preset number can be flexibly set according to actual usage requirements, and the present disclosure does not make specific limitations in this regard; the specific circuit structure of the pixel adjustment circuit can be flexibly set according to actual usage requirements, as long as it can use the foregoing components to implement data operations of the quasi-S-shaped curve based on quadratic polynomials, and the present disclosure does not make specific limitations in this regard.
[0055] After determining the initial pixel value corresponding to each pixel point in the image to be displayed, the initial pixel value corresponding to any one pixel point can be input into the pixel adjustment circuit for data operations of the quasi-S-shaped curve, so as to determine the target pixel value corresponding to this pixel point.
[0056] Furthermore, the pixel adjustment circuit can directly output the target pixel value corresponding to each pixel point to the driving circuit corresponding to the target display device to drive the target display device to output the display result corresponding to the image to be displayed, so that the image to be displayed itself does not need to be changed, and on the basis of ensuring the original data performance of the image to be displayed, the display effect of the target display device on the image to be displayed is improved.
[0057] In a possible implementation manner, when the values of all preset operation coefficients are not powers of 2, the first preset number is equal to 0, and the second preset number is equal to 11.
[0058] When the values of all preset operation coefficients are not powers of 2, for any multiplication operation in the quasi-S-shaped curve mapping relationship based on quadratic polynomials, an independent multiplier is required to implement. In this case, the first preset number can be set to 0, and the second preset number can be set to 11, that is, it is set that the pixel adjustment circuit does not include shift registers and only includes 11 multipliers and 4 adders.
[0059] Figure 3 Show a schematic structural diagram of a pixel adjustment circuit according to an embodiment of the present disclosure. As Figure 3 shown, the pixel adjustment circuit includes 4 adders and 11 adders, and a multiplier corresponding to any one preset operation coefficient.
[0060] In a possible implementation manner, when at least one of the preset operation coefficients α1, α2, α3, k1, and k2 has a value that is a power of 2, the first preset number is equal to the number of preset operation coefficients whose values are powers of 2.
[0061] When at least one of the preset operation coefficients α1, α2, α3, k1, and k2 takes a value that is a power of 2, when it comes to the multiplication operation related to the preset operation coefficient, the corresponding multiplier can be adjusted to a shift register, and the multiplication operation can be realized through a shift operation, thereby improving the corresponding operation speed and saving operation resources. In this case, the first preset quantity can be set to be equal to the number of preset operation coefficients whose values are powers of 2; the specific value of the second preset quantity can be flexibly set according to the actual circuit structure of the pixel adjustment circuit, and the present disclosure does not make specific limitations thereon.
[0062] In an example, the values of the preset operation coefficients α1, α2, α3, k1, and k2 are all powers of 2. The value of the first preset quantity can be set to 5, and the value of the second preset quantity can be set to 4, that is, the pixel adjustment circuit includes 5 shift registers, 4 multipliers, and 4 adders.
[0063] It should be noted that although the embodiments of the present disclosure take Figure 3 as an example to introduce the pixel adjustment circuit as above, those skilled in the art can understand that the present disclosure should not be limited thereto. In fact, the user can completely flexibly set the specific circuit structure of the pixel adjustment circuit according to personal preferences and / or actual application scenarios, as long as it can implement the data operation of the quasi-S-shaped curve based on the quadratic polynomial based on the above principle.
[0064] In the embodiments of the present disclosure, for any pixel point in the image to be displayed, the initial pixel value corresponding to the pixel point can be contrast-adjusted by using the quasi-S-shaped curve mapping relationship based on the quadratic polynomial to determine the target pixel value corresponding to the pixel point. On the one hand, it can solve the problem that the common contrast adjustment methods in the prior art are limited by the LUT size from the source, avoid the fracture / fault phenomenon in the image after global contrast adjustment, and ensure the visual effect of the display device; on the other hand, compared with the standard S-shaped mapping relationship based on the exponential function, the quasi-S-shaped curve mapping relationship based on the quadratic polynomial used in the present disclosure is convenient to be implemented by a hardware circuit, and can reduce the cost input in the actual application scenario; according to the target pixel value corresponding to each pixel point, the target display device can be driven to output the display result corresponding to the image to be displayed, and it is ensured that the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
[0065] It can be understood that the above-mentioned various method embodiments mentioned in the present disclosure can be combined with each other to form combined embodiments without violating the principle logic. Due to space limitations, the present disclosure will not elaborate. Those skilled in the art can understand that in the above methods of the specific implementation manner, the specific execution order of each step should be determined according to its function and possible internal logic.
[0066] In addition, the present disclosure also provides a global contrast adjustment device, an electronic device, a computer-readable storage medium, and a program, all of which can be used to implement any one of the global contrast adjustment methods provided by the present disclosure. For the corresponding technical solutions and descriptions, please refer to the corresponding records in the method section and will not be repeated here.
[0067] Figure 4 The block diagram of a global contrast adjustment device according to an embodiment of the present disclosure is shown. As Figure 4 shown, the device 400 includes:
[0068] A pixel value determination module 401, configured to determine an initial pixel value corresponding to each pixel point in the image to be displayed;
[0069] A pixel adjustment module 402, configured to perform contrast adjustment on the initial pixel value corresponding to any pixel point in the image to be displayed by using a pseudo-S curve mapping relationship based on a quadratic polynomial, and determine a target pixel value corresponding to the pixel point;
[0070] A driving module 403, configured to drive a target display device to output a display result corresponding to the image to be displayed according to the target pixel value corresponding to each pixel point, where the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
[0071] In a possible implementation manner, the pseudo-S curve mapping relationship based on a quadratic polynomial is:
[0072]
[0073] where x represents the initial pixel value corresponding to any pixel point, y represents the target pixel value corresponding to the pixel point, f(x) represents the result of the first quadratic polynomial operation, g(x) represents the result of the second quadratic polynomial operation, and α1, α2, α3, k1, and k2 represent preset operation coefficients.
[0074] In a possible implementation manner, the pixel adjustment module 402 includes: a preset pixel adjustment circuit, and the pixel adjustment circuit includes: a first preset number of multipliers, a second preset number of shift registers, and 4 adders.
[0075] In a possible implementation manner, when the values of all preset operation coefficients are not powers of 2, the first preset number is equal to 0, and the second preset number is equal to 11.
[0076] In a possible implementation manner, when at least one of the preset operation coefficients α1, α2, α3, k1, and k2 has a value that is a power of 2, the first preset number is equal to the number of preset operation coefficients whose values are powers of 2.
[0077] In some embodiments, the functions or modules included in the device provided by the embodiments of the present disclosure can be used to execute the methods described in the above method embodiments. The specific implementation can refer to the description of the above method embodiments. For the sake of brevity, it will not be repeated here.
[0078] The embodiments of the present disclosure also propose a display chip, which is used to implement the above-mentioned global contrast adjustment method, or includes at least one of the above-mentioned global contrast adjustment devices.
[0079] The embodiments of the present disclosure also propose a display device, including a plurality of display units and at least one of the above-mentioned global contrast adjustment devices, or at least one of the above-mentioned display chips.
[0080] In a possible implementation manner, the display unit includes a display panel, and the display panel includes at least one of a liquid crystal display panel, a micro light-emitting diode display panel, a light-emitting diode display panel, a mini light-emitting diode display panel, a quantum dot light-emitting diode display panel, an organic light-emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electro-wetting display panel, and a small-pitch display panel.
[0081] The embodiments of the present disclosure also propose an electronic device, including the aforementioned display device.
[0082] Exemplarily, the electronic device in this embodiment includes, but is not limited to, a desktop computer, a television, a mobile device with a large screen such as a mobile phone, a tablet computer, and other common electronic devices that require multiple chips to be cascaded and connected to achieve driving.
[0083] Exemplarily, the electronic device may also be a user equipment (UE), a mobile device, a user terminal, a terminal, a handheld device, a computing device, or a vehicle-mounted device, etc. Exemplarily, some examples of terminals are: a display, a smart phone or a portable device, a mobile phone, a tablet computer, a laptop computer, a palmtop computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a wireless terminal in a vehicle-to-everything network, etc. For example, the server may be a local server or a cloud server.
[0084] The above description is only an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.
[0085] The special term "exemplary" herein means "serving as an example, an embodiment or illustrative". Any embodiment described as "exemplary" here does not have to be construed as superior or better than other embodiments.
[0086] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.
[0087] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of an instruction, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or by a combination of dedicated hardware and computer instructions.
[0088] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art in the field of this technology without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the field of this technology to understand the embodiments disclosed herein.
Claims
1. A global contrast adjustment method, characterized in that, Comprising: Determine the initial pixel value corresponding to each pixel point in the image to be displayed; For any pixel point in the image to be displayed, use the quasi-S curve mapping relationship based on a quadratic polynomial to perform contrast adjustment on the initial pixel value corresponding to this pixel point, and determine the target pixel value corresponding to this pixel point; According to the target pixel value corresponding to each pixel point, drive the target display device to output the display result corresponding to the image to be displayed, wherein the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
2. The method according to claim 1, wherein The quasi-S curve mapping relationship based on a quadratic polynomial is: Wherein, x represents the initial pixel value corresponding to any pixel point, y represents the target pixel value corresponding to this pixel point, f(x) represents the result of the first quadratic polynomial operation, g(x) represents the result of the second quadratic polynomial operation, and α1, α2, α3, k1, and k2 represent preset operation coefficients.
3. The method according to claim 2, wherein The step of, for any pixel point in the image to be displayed, using the quasi-S curve mapping relationship based on a quadratic polynomial to perform contrast adjustment on the initial pixel value corresponding to this pixel point and determining the target pixel value corresponding to this pixel point includes: For any pixel point in the image to be displayed, input the initial pixel value corresponding to this pixel point into a preset pixel adjustment circuit for data operation of the quasi-S curve to determine the target pixel value corresponding to this pixel point, wherein the pixel adjustment circuit includes: a first preset number of shift registers, a second preset number of multipliers, and 4 adders.
4. The method according to claim 3, wherein When the values of all preset operation coefficients are not powers of 2, the first preset number is equal to 0, and the second preset number is equal to 11.
5. The method according to claim 3, characterized in that, When the value of at least one of the preset operation coefficients α1, α2, α3, k1, and k2 is a power of 2, the first preset number is equal to the number of preset operation coefficients whose values are powers of 2.
6. A global contrast adjustment device, characterized in that, Comprising: A pixel value determination module for determining the initial pixel value corresponding to each pixel point in the image to be displayed; A pixel adjustment module for, for any pixel point in the image to be displayed, using the quasi-S curve mapping relationship based on a quadratic polynomial to perform contrast adjustment on the initial pixel value corresponding to this pixel point and determining the target pixel value corresponding to this pixel point; A driving module for driving the target display device to output the display result corresponding to the image to be displayed according to the target pixel value corresponding to each pixel point, wherein the global contrast of the display result is higher than the global contrast corresponding to the image to be displayed.
7. The device according to claim 6, characterized in that, The pixel adjustment module includes: a preset pixel adjustment circuit, and the pixel adjustment circuit includes: a first preset number of multipliers, a second preset number of shift registers, and 4 adders.
8. A display chip, characterized in that, The display chip is used to implement the global contrast adjustment method according to any one of claims 1 to 5, or includes at least one global contrast adjustment device according to claim 6 or 7.
9. A display device, characterized in that, Comprising a plurality of display units, and at least one global contrast adjustment device according to claim 6 or 7, or at least one display chip according to claim 8.
10. The display device according to claim 9, wherein The display unit includes a display panel, and the display panel includes at least one of a liquid crystal display panel, a micro light-emitting diode display panel, a light-emitting diode display panel, a mini light-emitting diode display panel, a quantum dot light-emitting diode display panel, an organic light-emitting diode display panel, a cathode ray tube display panel, a digital light processing display panel, a field emission display panel, a plasma display panel, an electrophoretic display panel, an electro-wetting display panel, and a small pitch display panel.
11. An electronic device, comprising the display device according to claim 9 or 10.