Regional dynamic dimming method of display terminal

Abstract

The invention discloses a regional dynamic dimming method of a display terminal. The regional dynamic dimming method comprises the following steps: step 1, presetting a plurality of different dimming algorithms of the display terminal; 2, pre-classifying the display content of the display terminal; 3, determining the category of the current display content of the display terminal; 4, judging whether the current display content can be segmented or not; and 5, performing full-frame area dynamic dimming on the inseparable display content by adopting different preset dimming algorithms according to the category of the display content, and performing dynamic dimming on the divisible display content by adopting different preset dimming methods according to different areas of the current display content. Different dimming algorithms can be used according to the real-time display content of the display terminal, meanwhile, the real-time display content can be segmented, different dimming algorithms are adopted for different areas of interest, and the energy consumption of the display equipment is further reduced under the condition that different display effect requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of dynamic dimming of display devices, and in particular to a regional dynamic dimming method for a display terminal. Background Art

[0002] In recent years, with the continuous development of display technology, liquid crystal display technology has been widely used in the field of flat panel display. LCD technology is becoming more and more mature. At the same time, LED technology is also developing towards miniaturization and array. The partition backlight technology is also becoming more and more mature with the development of LED technology. Compared with traditional LED, the partition backlight technology can integrate more lamp beads in the same size, so that more backlight partitions can be set in the same size and different backlight partitions can be controlled. LCD displays composed of partition backlight have faster response speed, higher contrast, better display effect, and lower energy consumption.

[0003] In order to improve the display performance of the partitioned backlight display and further reduce the energy consumption of the display device, the dynamic dimming algorithm is also very important. The dynamic dimming algorithm is divided into a global dynamic dimming algorithm and a regional dynamic dimming algorithm. The global dynamic dimming algorithm adjusts the backlight brightness in real time by displaying the picture, and the backlight is not partitioned, that is, the backlight value is obtained by extracting the backlight through the current display content, and the LED display brightness in the backlight module is driven. The regional dimming performs partition control on the backlight source in the backlight module, and divides the current display content into several independent blocks corresponding to the backlight partition. The backlight brightness of each area can be extracted separately and drive the corresponding backlight partition. This method can make up for the shortcomings of global dynamic dimming and take into account the differences in local image features to achieve more accurate backlight control and further reduce energy consumption.

[0004] In the dynamic dimming algorithm, the determination of backlight brightness is one of the most important links. The power consumption of backlight sources in most current display devices accounts for about 70% of the total power consumption. The core of backlight brightness adjustment is to analyze the current display content to determine the appropriate backlight value. The current mainstream backlight extraction methods mainly include maximum value method, average value method, root mean square method, error correction method, image feature-based method, and human visual effects-based method. The above mainstream backlight extraction methods have different focuses, and different methods have different display effects and energy consumption. The dimming methods of the above display devices cannot perform dynamic dimming with different strategies for different areas of human eye attention according to the current display content. Summary of the invention

[0005] The present invention provides a dynamic dimming method for a display terminal, which can further reduce power consumption while maintaining viewing effects on a display terminal device with zone dimming.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A method for regional dynamic dimming of a display terminal comprises the following steps: Step 1: Based on different preset dimming algorithms, different preset dimming algorithms corresponding to the real-time display content of the display terminal are determined, wherein the dimming algorithms are used to extract the backlight source in real time using different backlight extraction methods, thereby dynamically adjusting the backlight according to the extracted backlight value; Presetting different dimming algorithms for the display device, wherein the preset dimming algorithms include a plurality of different backlight extraction methods, and performing backlight control on the partition backlight according to the backlight value obtained by the different backlight extraction methods; The above-mentioned different dimming algorithms are used to perform dimming operations according to different display contents, and pixel compensation is performed in combination with the obtained backlight value to complete the display; Step 2: pre-classify the display content of the display terminal into a first display content and a second display content, wherein the first display content corresponds to a first dimming algorithm and the second display content corresponds to a second dimming algorithm, and perform regional dynamic dimming operation on the full-frame display content according to different dimming algorithms corresponding to different contents; The first display content corresponds to a dimming operation using a first dimming algorithm, and the second display content corresponds to a dimming operation using a second dimming algorithm; Different dimming algorithms are used to perform dimming operations according to different display contents, and the dimming algorithms and display contents include but are not limited to two types; Step 3, obtaining the display content in the display terminal, and performing region segmentation on the display content according to different display contents, and segmenting the current display content into a first focus region B1 and a second focus region B2; The displayed contents are divided into divisible display contents and indivisible display contents; After the display content classification is completed in the above step 2, the current display content is judged to be divisible or indivisible; The indivisible content is backlit according to the corresponding dimming algorithm in step 1; The splittable content is split according to the step 4; Step 4: Based on the first area of ​​interest B1 and the second area of ​​interest B2 obtained in step 3, backlight extraction is performed on the first area of ​​interest and the second area of ​​interest according to different dimming algorithms to obtain a first backlight value BL1 and a second backlight value BL2, and dynamic dimming operation is performed according to the different backlight values; Step 5: The display device determines, based on the current display content of the display terminal, that the content belongs to the content category corresponding to the pre-classified content, and dynamically controls the backlight of the current display content using a preset top dimming algorithm in the root domain; According to the above steps 1 to 5, backlight value extraction, display content classification, and display content area segmentation operations are performed, and dimming operations are performed according to the above results; The overall operation process of dimming the display terminal is as follows: based on the current display content of the display device, it is determined that the content belongs to the content corresponding to the pre-classified content, and the full-frame area dynamic backlight control is performed on the current display content according to the preset top dimming algorithm, wherein the display content meets the area segmentation content conditions, and according to the above steps, the different focus areas of the current display content are subjected to regional dynamic backlight control.

[0007] Step 6: If the displayed content in the above step 5 meets the area segmentation content condition, according to the operations in step 3 and step 4, the different focus areas after the current displayed content is segmented are subjected to regional dynamic backlight control; The dimming operation is implemented by using a preset dimming algorithm to perform dynamic dimming when the displayed content is not divisible, and by matching the area segmentation result to the backlight panel to perform dynamic area dimming according to the backlight values ​​corresponding to different focus areas when the displayed content is divisible.

[0008] Step 7: Perform pixel compensation on the liquid crystal panel according to the dynamic backlight control data obtained based on the selected preset dimming algorithm.

[0009] The regional dynamic dimming algorithm of the display terminal described in the above steps can use different backlight control algorithms for dynamic dimming according to different display contents and different focus areas, so as to further improve the energy saving efficiency of the display device without reducing the display effect.

[0010] In step 1, the preset multiple dimming algorithms include but are not limited to maximum value dimming algorithm, average value dimming algorithm, root mean square dimming algorithm, error correction dimming algorithm and other display device dimming algorithms. The dimming algorithms have different display effects and energy-saving efficiencies. The preset dimming algorithms are respectively applied in the dimming operations.

[0011] In step 2, the display content of the display terminal is pre-classified, and different dimming algorithms are used to dim the current backlight according to different display content with different display effect requirements. The different dimming algorithms used focus on improving display effect and reducing energy consumption respectively. Among them, the first display content with lower display effect requirements can adopt dimming algorithms that focus on higher energy saving rate, including but not limited to average value dimming method, so as to achieve the purpose of reducing energy consumption when displaying the first display content with lower picture effect requirements. At the same time, the second display content with higher display effect requirements can adopt dimming algorithms that focus on display effect, including but not limited to maximum value dimming algorithm.

[0012] In step 2, by adopting different dimming strategies for different display contents, the display effect of the display terminal device can be guaranteed when the display effect requirement is high, and energy consumption can be reduced while meeting the current display effect requirement in scenarios with low display effect requirement.

[0013] In step 3, the screen is divided according to different display contents, and the current display screen is divided into a first focus area, a second focus area, etc., wherein the number of focus areas includes but is not limited to two; After the display content is pre-classified into different display contents such as the first display content and the second display content, if the current display content is divisible, the display content is segmented according to different areas in the different display contents, and the judgment method includes whether the display content is divisible and the specific segmentation method preset in the display terminal device processor, or using a real-time segmentation method to segment the current display content into different focus areas; after the segmentation is completed, different preset dimming algorithms are used to perform dynamic backlight control according to different focus areas.

[0014] In step 4, the current display screen is divided into a first focus area B1, a second focus area B2, etc. The current display screen is divided, and the division method includes but is not limited to the division method based on the human eye focus area or the area of ​​interest, including pre-division of specific display content, real-time segmentation, etc.; Among the different focus areas, take the first focus area B1 and the second focus area B2 as examples. The first focus area B1 is an area in the current display content where the human eye pays more attention, and the second focus area B2 is an area in the current display content where the human eye pays less attention. The human eye has different emphases on different areas, and different focus areas have different degrees of interest. Based on the principle, different dimming strategies are used to dynamically control the backlight of different areas.

[0015] In step 4, the number of the first focus areas and the second focus areas includes but is not limited to two, and the corresponding backlight values ​​also include but are not limited to two. The obtained backlight values ​​are used in step 7 to control the backlight panel.

[0016] In step 5, the display terminal device can use the processor to determine whether the display content can be divided, and can also use the processor to determine the number of divided areas of the current display content. The determination conditions can be a preset segmentation area method, a real-time segmentation area determination method, or can be determined by an external processor, and the determination result is input into the display terminal processor for dimming operation.

[0017] In step 6, when the judgment result is that the currently displayed content is indivisible, dynamic dimming operation is performed through the preset dimming algorithm. Taking the maximum value dimming algorithm as an example, the maximum value dimming algorithm can be used to obtain all backlight partition values ​​in the backlight panel, and each backlight partition value obtained is transmitted to the backlight module driving module, thereby completing dynamic backlight adjustment.

[0018] In step 6, when the judgment result is that the current display content is divisible, the dynamic area dimming operation is performed through the preset dimming algorithm. Taking the maximum value dimming algorithm and the average value dimming algorithm as examples, the maximum value dimming algorithm can be used to perform dimming operations on the first focus area B1, and the average value dimming algorithm can be used to perform dimming operations on the second focus area B2. The backlight partition value corresponding to the first focus area extracted by the maximum value algorithm and the backlight partition value corresponding to the second focus area extracted by the average value dimming algorithm are transmitted to the backlight module driving module, thereby completing the dynamic area backlight adjustment.

[0019] In step 7, through the above operations, dynamic dimming and dynamic area dimming obtain each backlight partition value. Through different backlight values ​​obtained based on different methods, the pixel compensation factor of each pixel in each backlight partition can be obtained respectively in both cases. According to the pixel compensation factor of each pixel, each pixel in the image displayed by the display terminal is compensated.

[0020] The advantages of the present invention are: the present invention can use different dimming algorithms according to the real-time display content of the display terminal, and can also segment the real-time display content and use different dimming algorithms for different focus areas, thereby further reducing the energy consumption of the display device while meeting different display effect requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a flowchart of a method according to an embodiment of the present invention; Figure 2 is a first display content example diagram in an embodiment of the present invention; Figure 3 is an example diagram of the second display content in an embodiment of the present invention; Figure 4 is an example diagram of divisible display content in an embodiment of the present invention; Figure 5 is an example diagram of segmentation of segmentable display content in an embodiment of the present invention; Figure 6 is a schematic diagram of the partitioning of the backlight panel in an embodiment of the present invention; Figure 7 is a first display content dimming diagram in an embodiment of the present invention; Figure 8 is a second display content dimming diagram in an embodiment of the present invention; Fig. 9It is a divisible display content dimming diagram in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, this embodiment discloses a dynamic dimming method for a display terminal, comprising the following steps: Step 1, presetting different dimming algorithms for the display device, wherein the preset dimming algorithms include a plurality of different backlight extraction methods, and determining to use the preset dimming algorithms to perform backlight control on the partition backlight according to subsequent steps; In this embodiment, three different dimming algorithms, namely, a maximum value dimming algorithm, an average value dimming algorithm, and an error correction dimming algorithm, are pre-set in the display terminal device processor. Among them, the maximum value dimming algorithm has the best display effect and the worst energy saving rate, the average value dimming algorithm has the lowest display effect and the best energy saving rate, and the error correction algorithm has a moderate display effect and a moderate energy saving rate. The subsequent steps can be performed by calling the dimming algorithm in step 1 to control the backlight.

[0024] Step 2: pre-classify the display content into a first display content and a second display content, wherein the first display content corresponds to a dimming algorithm and the second display content corresponds to a second dimming algorithm, and perform dynamic dimming operation according to different dimming algorithms corresponding to different contents; In this embodiment, the first display content in step 2 is set to display content in the display terminal device, including but not limited to desktop content, text information, etc., which has a lower display effect requirement, such as Figure 2 The desktop content shown in , usually such display content only serves as an indication or identification for the user. When the display terminal device displays such information, the average value algorithm in the above step 1 can be used to control the backlight. Through the above operation, the purpose of increasing the energy saving rate can be achieved without affecting the user experience of the display terminal device; The second display content in step 2 can be set to display content with high display effect requirements such as film and television videos, e-sports games, etc. in the display terminal device, such as Figure 3 The video display content shown. Usually, such users have higher requirements for the image quality of such display content and need better display effects. When the display terminal device displays such information, the maximum value algorithm in step 1 above can be used for backlight control. Through the above operation, the display effect can be improved as much as possible while reducing the energy saving rate to improve the user's viewing experience.

[0025] Step 3: After the display content is classified and determined in step 2, the current display content is judged to be divisible or indivisible; In this embodiment, Figure 4As shown, the displayed content includes multiple areas, including the main content of dynamic video and other secondary content such as text and pictures. It can be divided into different attention areas according to the degree of human eye attention. The segmentation method can be preset segmentation, and it can be pre-segmented through different display contents including different scenes such as web pages and applications, or it can be segmented through real-time segmentation methods such as deep learning.

[0026] Step 4: segment the current display content into regions based on the divisible content in step 3, and segment the current display content into a first focus region B1, a second focus region B2, etc. according to the focus region of human eyes; In this embodiment, the region segmentation described in step 4 is performed according to the different levels of human eye attention in the displayed content, and the displayed content can be segmented as follows: Figure 4 As shown, human eyes have different attention levels to different areas in the displayed content, wherein the first attention area B1 may correspond to Figure 4 In the video content display area, the second focus area B2 can correspond to Figure 4 Displays other areas of the content except the video content. The segmentation results are as follows: Figure 5 shown.

[0027] Based on the obtained first focus area B1 and second focus area B2, dimming operation is performed on the current display content according to different preset dimming algorithms to obtain backlight values ​​of the first focus area and the second focus area, a first backlight value BL1 and a second backlight value BL2; In this embodiment, dynamic dimming of different focus areas can be performed according to the maximum value dimming algorithm and the average value dimming algorithm preset in step 1, such as Figure 5 As shown, the first focus area B1 is an area with a stronger degree of human eye attention, and a maximum value dimming algorithm with better display effect can be used to obtain the first backlight value BL1. The second focus area B2 is an area with a lower degree of human eye attention, and an average value dimming algorithm with weaker display effect can be used to obtain the second backlight value BL2. In the above operations, energy consumption can be reduced by using different dimming algorithms for different focus areas to control the backlight.

[0028] Step 5: extract backlight value, classify display content, and segment display content area according to the above steps 1 to 5, and perform dimming operation according to the above results; In this embodiment, the overall dimming operation process of the display terminal is as follows: based on the current display content of the display device, it is determined that the content belongs to the content corresponding to the pre-classified content, and the current display content is dynamically controlled in terms of the backlight according to the preset top dimming algorithm, wherein the display content meets the area segmentation content conditions, and according to the above steps, the different focus areas of the current display content are dynamically controlled in terms of the backlight.

[0029] Step 6, the dimming operation is implemented by using a preset dimming algorithm to perform dynamic dimming of the full-frame area when the display content cannot be divided, and matching the area segmentation result to the backlight panel to perform dynamic dimming of each area according to the backlight values ​​corresponding to different focus areas when the display content can be divided.

[0030] In this embodiment, a 64x32 partition Mini-LED backlight is used. The schematic diagram of the backlight partition is as follows: Figure 6 As shown, the first display content obtains the partition backlight value through the dimming method according to the average dimming algorithm, such as Figure 7 As shown, the second display content obtains the partition backlight value through the dimming method according to the maximum value dimming algorithm, such as Figure 8 As shown, the display content can be divided and different dimming algorithms are used according to different areas to obtain the partition backlight value through the regional dimming method, such as Fig. 9 As shown, the subarea backlight values ​​obtained in the above different situations are transmitted to the backlight module driving module, thereby completing the backlight control.

[0031] Step 7: Perform pixel compensation on the liquid crystal panel according to the dynamic backlight control data obtained based on the selected preset dimming algorithm.

[0032] In this embodiment, the 64×32 backlight brightness matrix is ​​smoothed by the fuzzy mask-diffusion method BMA, which is a common method in the dimming field, and the backlight value corresponding to each pixel on the liquid crystal panel is accurately obtained, so as to obtain the pixel compensation factor of the pixel at the corresponding position, and the brightness adjustment signal of each pixel is obtained according to the pixel compensation factor, and sent to the liquid crystal control module to finally display the image, thereby completing the compensation of each pixel in the displayed image.

[0033] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. As long as such combination does not violate the concept of the present invention, it should also be regarded as the content disclosed in the present disclosure. In order to avoid unnecessary repetition, the present invention will not further explain various possible combinations.

[0034] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A regional dynamic dimming method for a display terminal, It is characterized in that The following steps are involved: Step 1: Based on different preset dimming algorithms, different preset dimming algorithms corresponding to the real-time display content of the display terminal are determined, wherein the dimming algorithms are used to extract the backlight source in real time using different backlight extraction methods, thereby dynamically adjusting the backlight according to the extracted backlight value; Step 2: pre-classify the display content of the display terminal into a first display content and a second display content, wherein the first display content corresponds to a first dimming algorithm and the second display content corresponds to a second dimming algorithm, and perform regional dynamic dimming operation on the full-frame display content according to different dimming algorithms corresponding to different contents; Step 3, obtaining the display content in the display terminal, and performing region segmentation on the display content according to different display contents, and segmenting the current display content into a first focus region B1 and a second focus region B2; Step 4: Based on the first area of ​​interest B1 and the second area of ​​interest B2 obtained in step 3, backlight extraction is performed on the first area of ​​interest and the second area of ​​interest according to different dimming algorithms to obtain a first backlight value BL1 and a second backlight value BL2, and dynamic dimming operation is performed according to the different backlight values; Step 5: The display device determines, based on the current display content of the display terminal, that the content belongs to the content category corresponding to the pre-classified content, and dynamically controls the backlight of the current display content using a preset top dimming algorithm in the root domain; Step 6: If the displayed content in the above step 5 meets the area segmentation content condition, according to the operations in step 3 and step 4, the different focus areas after the current displayed content is segmented are subjected to regional dynamic backlight control; Step 7: Perform pixel compensation on the liquid crystal panel according to the dynamic backlight control data obtained by the selected different preset dimming algorithms.

2. A method for regional dynamic dimming of a display terminal according to claim 1, It is characterized in that The different preset dimming algorithms described in step 1 include a maximum value dimming algorithm, an average value dimming algorithm, a root mean square dimming algorithm, and an error correction dimming algorithm.

3. A method for regional dynamic dimming of a display terminal according to claim 2, It is characterized in that The pre-classification of the display content of the display terminal described in step 2 is specifically as follows: different display contents have different requirements for display effects, and different dimming algorithms are used to dim the current backlight. Different dimming algorithms make trade-offs between display effects and energy-saving efficiency. The first display content that does not require high display effects adopts the root mean square dimming method, and the second display content that requires higher display effects adopts the maximum value dimming algorithm. The current backlight value is extracted through the matched dimming algorithm.

4. A method for regional dynamic dimming of a display terminal according to claim 3, It is characterized in that In step 3, after pre-classifying the display content into the first display content and the second display content, the display content is segmented according to the different display contents, including performing area segmentation according to factors of human eye attention and interest in the current content, and segmenting the current display content into a first focus area B1 and a second focus area B2.

5. A method for regional dynamic dimming of a display terminal according to claim 4, It is characterized in that In step 4, the first area of ​​interest and the second area of ​​interest obtained in step 3 are different areas obtained according to the degree of attention and interest of the human eye. According to different preset dimming algorithms, a dimming algorithm focusing on display effect is used for the first area of ​​interest, and a dimming algorithm focusing on energy saving efficiency is used for the second area of ​​interest.

6. A method for regional dynamic dimming of a display terminal according to claim 1, It is characterized in that In step 5, the display device identifies, through the display terminal processor, that the currently displayed content belongs to the category of the first display content or the second display content in the pre-classified content in step 2, and matches the dimming algorithm corresponding to the current content by the category, thereby performing a dimming operation on the currently displayed content according to the preset dimming algorithm; In step 5, the pre-classified content also includes divisible display content and indivisible display content. The system presets whether the display content is divisible and pre-divides it, and divides it in real time according to the current display content.

7. A method for regional dynamic dimming of a display terminal according to claim 6, It is characterized in that Step 6 also includes the display device distinguishing the divisible display content from the indivisible display content through the display terminal processor, and matching them by using system preset segmentation or real-time segmentation.

8. A method for regional dynamic dimming of a display terminal according to claim 1, It is characterized in that In step 5, the backlight of the display terminal is controlled, and the corresponding backlight algorithm is used to dim the different contents. After the backlight value is determined, the dimming factor K of the corresponding backlight module needs to be determined, and the pulse width modulation signal of the backlight LED in each backlight corresponding backlight module is set according to the backlight module dimming factor K.

9. A method for regional dynamic dimming of a display terminal according to claim 8, It is characterized in that In step 7, after the backlight value is obtained, the pixel compensation factor of the liquid crystal panel is determined, and pixel compensation is performed on the liquid crystal panel according to the compensation factor of each pixel.

10. A method for regional dynamic dimming of a display terminal according to claim 1, It is characterized in that The display terminal includes a liquid crystal panel, a backlight module, and a processor, wherein the display panel and the backlight module are connected to the processor, and the processor controls the display panel and the backlight module; The processor performs dimming operations, content preprocessing, area segmentation, backlight control, and pixel compensation operations.

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