A display device

Abstract

This invention discloses a display device, characterized in that the display device includes a liquid crystal display panel and a backlight module. The backlight module includes a photosensitive unit and a driving unit electrically connected to each other; the backlight module includes multiple backlight zones; the photosensitive unit is used to acquire the real-time brightness value of ambient light; the driving unit is used to adjust the number of minimum backlight zones contained in each backlight zone according to the real-time brightness value, wherein the minimum backlight zone is the backlight zone when the ambient light brightness value is 0 lux. The technical solution provided by this invention can dynamically adjust the size of the zones according to different ambient light brightness, thereby adjusting the number of zones in the display device, which can improve halo effect, enhance display effect, and reduce overall power consumption and cost.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display device. Background Technology

[0002] As the requirements for display technology become increasingly sophisticated, so too do people's demands for display devices. Existing LCD devices can achieve significant improvements in contrast and power consumption through local dimming backlighting, making them promising for a wide range of applications.

[0003] The main challenge for display devices at present is to balance display effect and cost. A smaller number of partitions is prone to halo effect, but the cost is low. Increasing the number of partitions can effectively improve the halo problem, but it will lead to increased cost, greater driving difficulty, and higher power consumption. Summary of the Invention

[0004] This invention provides a display device that dynamically adjusts the size of the partitions based on the ambient light intensity, thereby adjusting the number of partitions in the display device. This not only improves halo effect and enhances display quality but also reduces overall power consumption and cost.

[0005] In a first aspect, embodiments of the present invention provide a display device, the display device including a liquid crystal display panel and a backlight module, the backlight module including a photosensitive unit and a driving unit electrically connected;

[0006] The backlight module includes multiple backlight zones;

[0007] The photosensitive unit is used to acquire the real-time brightness value of ambient light;

[0008] The driving unit is used to adjust the number of minimum backlight zones included in each backlight zone according to the real-time brightness value, wherein the minimum backlight zone is the backlight zone when the ambient light brightness value is 0 lux.

[0009] The solution provided by this invention includes a backlight module comprising an electrically connected photosensitive unit and a driving unit. The backlight module includes multiple backlight zones. The photosensitive unit sends the real-time brightness value of the ambient light to the driving unit, so that the driving unit adjusts the minimum number of backlight zones contained in each backlight zone according to the real-time brightness value. This achieves dynamic adjustment of the size of each backlight zone, thereby dynamically adjusting the number of backlight zones in the backlight module. This effectively avoids halo effects while also reducing overall power consumption and cost.

[0010] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, although the drawings described below are some specific embodiments of the present invention, those skilled in the art can extend and extend the basic concepts of the device structure, driving method and manufacturing method disclosed and indicated by various embodiments of the present invention to other structures and drawings. Undoubtedly, these should all be within the scope of the claims of the present invention.

[0012] Figure 1 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention;

[0013] Figure 2 This is a partial structural diagram of a backlight module provided in an embodiment of the present invention;

[0014] Figure 3a This is a schematic diagram of the structure of a partial backlight zone when the ambient light brightness value is 100 lux.

[0015] Figure 3b This is a schematic diagram of the structure of a partial backlight zone when the ambient light brightness is 500 lux.

[0016] Figure 4 This is a partial structural schematic diagram of another backlight module provided in an embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of another display device provided in an embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention;

[0019] Figure 7 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention;

[0020] Figure 8 This is a schematic diagram of another display device provided in an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the basic concepts disclosed and indicated in the embodiments of this invention, all other embodiments obtained by those skilled in the art are within the scope of protection of this invention.

[0022] Figure 1This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Figure 2 This is a partial structural schematic diagram of a backlight module provided as an example of the present invention, in conjunction with reference to the reference. Figure 1 and Figure 2 As shown, the display device 100 includes a liquid crystal display panel 10 and a backlight module 20. The backlight module 20 includes a photosensitive unit 21 and a driving unit 22 that are electrically connected. The backlight module 20 includes a plurality of backlight zones 210. The photosensitive unit 21 is used to acquire the real-time brightness value of the ambient light. The driving unit 22 is used to adjust the number of minimum backlight zones 201 contained in each backlight zone 210 according to the real-time brightness value, wherein the minimum backlight zone 201 is the backlight zone when the brightness value of the ambient light is 0 lux.

[0023] The photosensitive unit 21 and the driving unit 22 can be located inside the backlight module 20, and their specific locations can be set according to actual needs. Figure 1 The image is shown only by dashed lines as an example. It should be noted that... Figure 1 This only shows a relative positional relationship between the liquid crystal display panel 10 and the backlight module 20, and does not represent the actual film structure and size contained in the liquid crystal display panel 10 and the backlight module 20.

[0024] The display device 100 provided in this embodiment can be a mobile phone or any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, medical equipment, industrial control equipment, touch interactive terminal, etc. This embodiment of the invention does not make any special limitations on these.

[0025] The inventors discovered that the brighter the ambient light, the less noticeable the halo effect in the displayed image; conversely, the lower the ambient light, the more noticeable the halo effect. Therefore, the photosensitive unit 21 can acquire the real-time brightness value of the ambient light and send it to the driving unit 22. The driving unit 22 can adjust the number of minimum backlight zones 201 contained in each backlight zone 210 based on the received real-time brightness value. When the real-time brightness of the ambient light acquired by the photosensitive unit 21 increases, the driving unit 22 can increase the number of minimum backlight zones 201 contained in each backlight zone 210, i.e., increase the size of the backlight zones 210, thereby reducing the number of backlight zones 210 on the display module 20, thus reducing overall power consumption and cost. When the real-time brightness of the ambient light obtained by the photosensitive unit 21 decreases, the driving unit 22 can adjust the number of the smallest backlight partitions 201 contained in each backlight partition 210 to decrease, that is, reduce the size of the backlight partitions 210, thereby increasing the number of backlight partitions 210 on the display module 20, which can effectively alleviate the halo situation in the display screen.

[0026] Among them, the minimum backlight zone 201 is the backlight zone when the ambient light brightness value is 0 lux. It can be understood that when the ambient light brightness value is 0 lux, the halo phenomenon of the display device is very obvious. In this case, the area of ​​each backlight zone 210 can be reduced to make it the minimum backlight zone 201, so that the backlight module 20 is divided into more backlight zones 210, and the backlight brightness of each minimum backlight zone 201 is adjusted separately to avoid the halo phenomenon of the display screen and improve the display effect.

[0027] It should be noted that the sizes of the multiple backlight zones 210 in the backlight module 20 can be the same or different. Figure 2 The structure of only a portion of the backlight partitions 210 is shown as an example, i.e., each backlight partition 210 includes 8 minimum backlight partitions 201, but is not limited thereto. Furthermore, Figure 2 The number, shape, and size of the backlight partitions 210 and the minimum backlight partitions 201 contained within the backlight partitions 210 shown are for illustrative purposes only and do not represent the actual number, shape, and size.

[0028] In this embodiment, the backlight module includes an electrically connected photosensitive unit and a driving unit. The backlight module includes multiple backlight zones. The photosensitive unit sends the real-time brightness value of the ambient light to the driving unit, so that the driving unit adjusts the minimum number of backlight zones contained in each backlight zone according to the real-time brightness value. In this way, the size of each backlight zone is dynamically adjusted, and the number of backlight zones in the backlight module is dynamically adjusted. This effectively avoids halo phenomenon and also reduces overall power consumption and cost.

[0029] Optional, continue to refer to Figure 1 The driving unit 22 is used to calculate the magnification factor of the backlight zone 210 compared with the minimum backlight zone 201 based on the real-time brightness value of the ambient light, and adjust the number of minimum backlight zones 201 contained in each backlight zone 210 according to the magnification factor.

[0030] Specifically, in adjusting the number of minimum backlight zones 201 contained in each backlight zone 210 based on the received real-time brightness value of the ambient light, the driving unit 22 can first calculate the amplification factor of the backlight zone 210 relative to the minimum backlight zone 201 based on the real-time brightness value. If the real-time brightness value is larger, the calculated amplification factor will also be larger. Thus, the number of minimum backlight zones 201 contained in each backlight zone 210 will increase based on the amplification factor, thereby increasing the size of the backlight zone 210 and reducing the number of backlight zones 210 on the display module 20, achieving the effect of reducing overall power consumption and cost. Conversely, if the real-time brightness value is smaller, the calculated amplification factor will be smaller. Thus, the number of minimum backlight zones 201 contained in each backlight zone 210 will decrease based on the amplification factor, thereby reducing the size of the backlight zone 210 and increasing the number of backlight zones 210 on the display module 20, effectively alleviating the halo effect in the displayed image and improving the display effect.

[0031] For example, Figure 3a This is a schematic diagram of the structure of a partial backlight zone when the ambient light intensity is 100 lux. Figure 3b This is a schematic diagram of the structure of a partial backlight zone when the ambient light intensity is 500 lux. Figure 3a and Figure 3b It can be seen that the higher the ambient light brightness, the more minimum backlight zones 201 the adjustable backlight zones 210 of the driving unit can include, resulting in a larger size for the backlight zones 210. This is to reduce power consumption while mitigating halos and ensuring good display performance. It should be noted that... Figure 3a and Figure 3b The number, shape, and size of the backlight zones shown are for illustrative purposes only and do not represent the actual number, shape, and size.

[0032] It is worth noting that the size of the backlight partition 210 can be adjusted according to the real-time brightness changes of the ambient light. Since the photosensitive unit 21 is located in the backlight module 20, the specific brightness value of the ambient light detected by the photosensitive unit 21 after the ambient light shines on the display device is also affected by the reflectivity of the display device itself. In addition, since the human eye perceives the brightness and contrast of the image displayed on the display device differently, the perception of halo phenomenon will also be affected. Thus, the amplification factor of the backlight partition 210 calculated based on the real-time brightness value of the ambient light, compared to the smallest backlight partition 201, can have a non-linear or linear relationship with the real-time brightness value. In this way, the number of smallest backlight partitions 201 contained in each backlight partition 210 can be precisely adjusted, which can effectively alleviate the halo problem when the display device displays the image, reduce the overall power consumption and driving difficulty of the display device, and thus reduce costs.

[0033] In an alternative implementation, continue to refer to Figure 1 The driving unit 22 is used to calculate the amplification factor m of the backlight zone compared to the smallest backlight zone according to the formula m=α*(Ld+La*R) / Ld; where Ld is the initial brightness of the display device, La is the real-time brightness value of the ambient light, R is the reflectivity of the liquid crystal display panel, 0.5%≤R≤6%, and α is the perception coefficient. When the real-time brightness value of the ambient light La=0lux, α=1, and when the real-time brightness value of the ambient light La>0lux, 1<α≤4.

[0034] The initial brightness Ld of the display device can be the display brightness of the display device itself. Without considering the influence of human eye perception, the perception coefficient α can always be 1. However, if the real-time brightness value La of the ambient light is 0 lux, the perception coefficient α can also be set to 1. If the real-time brightness value La of the ambient light is > 0 lux, the perception coefficient α can be set to any value that satisfies the requirement of 1 < α ≤ 4, depending on the actual situation.

[0035] Furthermore, the reflectivity R of a liquid crystal display panel can be considered as the average reflectivity of the entire display panel, which can be obtained through actual testing; the specific method is not limited here. For transmissive liquid crystal display panels, the range of reflectivity R is 0.5% ≤ R ≤ 6%, and the specific value can be set according to actual needs; no specific limitation is made here.

[0036] Specifically, based on the formula m=α*(Ld+La*R) / Ld for calculating the amplification factor m of the backlight partition compared to the smallest backlight partition, it can be seen that when the perception coefficient α and the reflectivity R of the liquid crystal display panel are fixed parameters, and the initial brightness Ld of the display device remains unchanged, the amplification factor m has a linear relationship with the real-time brightness value La. That is, the amplification factor m increases as the real-time brightness value La increases and decreases as the real-time brightness value La decreases. The size of the backlight partition can be dynamically adjusted based on the amplification factor m calculated from the real-time brightness value La. This can effectively alleviate the halo problem when the display device displays the image, reduce the overall power consumption and driving difficulty of the display device, and thus reduce costs.

[0037] Optional, continue to refer to Figure 1 and Figure 2 The drive unit 22 is also used to perform according to the formula The number N of backlight zones 210 is calculated; where N0 is the number of backlight zones 210 in the backlight module 20 when all of them are the minimum backlight zone 201, and m is the magnification factor of the backlight zone 210 compared to the minimum backlight zone 201. This indicates rounding down to the nearest integer.

[0038] Specifically, when the real-time ambient light brightness is 0 lux, the backlight partition 210 in the backlight module 20 is the smallest backlight partition 201, and the number of backlight partitions 210 in the backlight module 20 is also the maximum, which is N0. When the real-time ambient light brightness is greater than 0 lux, the driving unit 22 calculates the amplification factor m of the backlight partition 210 compared to the smallest backlight partition 201 based on the real-time ambient light brightness, and adjusts the number of smallest backlight partitions 201 contained in each backlight partition 210 according to the amplification factor, that is, adjusts the size of each backlight partition 210, so that the number N of backlight partitions 210 included in the adjusted display module 20 satisfies It is understandable that the number N of backlight zones 210 must be a positive integer. Since the ratio of N0 / m may not be a positive integer, the ratio of N0 / m can be rounded down. This may result in the number of minimum backlight zones 201 contained in all backlight zones 210 being not exactly the same. This can be set according to the actual situation, and no specific limit is made here.

[0039] Optional, Figure 4 This is a partial structural diagram of another backlight module provided in an embodiment of the present invention, in conjunction with reference to the reference. Figure 1 and Figure 4 As shown, the liquid crystal display panel 10 includes at least a first display area 10A and a second display area 10B; the backlight module 20 includes at least a first backlight area 20A and a second backlight area 20B. The first backlight area 20A is used to provide a backlight source for the first display area 10A, and the second backlight area 20B is used to provide a backlight source for the second display area 10B. Under the same ambient light real-time brightness value, the display requirements of the first display area 10A and the second display area 10B are different, and the number of backlight partitions 210 per unit area of ​​the first backlight area 20A and the number of backlight partitions 210 per unit area of ​​the second backlight area 20B are also different.

[0040] Continue to refer to Figure 1 , Figure 1 The relative positional relationship, shape, and size of the first display area 10A and the second display area 10B in the liquid crystal display panel 10 are illustrated by way of example, but it is not limited thereto. The liquid crystal display panel 10 may also include other display areas, which are not specifically limited here and can be set according to actual needs.

[0041] Specifically, the first display area 10A and the second display area 10B can be used to display different image content, which may result in different levels of detail or resolution of the images displayed in the first display area 10A and the second display area 10B. Thus, the size of the backlight partitions 210 in the first backlight area 20A corresponding to the first display area 10A and the second backlight area 20B corresponding to the second display area 10B can be adjusted as needed according to the different display requirements of the first display area 10A and the second display area 10B. That is, for the same ambient light real-time brightness value, the number of backlight partitions 210 per unit area in the first backlight area 20A and the number of backlight partitions 210 per unit area in the second backlight area 20B can be set to be different, so as to meet different display requirements, effectively improve the halo problem, and reduce overall power consumption and cost.

[0042] For example, Figure 4 The diagram illustrates the structure of the backlight module 20 with 8 backlight partitions 210 per unit area in the first backlight region 20A and 4 backlight partitions 210 per unit area in the second backlight region 20B under the same ambient light real-time brightness value. Because the number of backlight partitions 210 per unit area in the first backlight region 20A and the second backlight region 20B are different, the backlight effect provided by the first backlight region 20A to the first display area and the backlight effect provided by the second backlight region 20B to the second display area 10B will also be different. In this way, the same backlight module 20 can adaptively adjust the number of backlight partitions 210 according to the different display needs of different areas of the liquid crystal display panel 10, which can not only improve the display effect and reduce the halo problem, but also reduce the overall power consumption and cost.

[0043] Optional, continue to refer to Figure 1 and Figure 4 Under the same ambient light real-time brightness value, when the display detail of the first display area 10A is greater than that of the second display area 10B, the number of backlight partitions 210 per unit area of ​​the first backlight area 20A is greater than the number of backlight partitions 210 per unit area of ​​the second backlight area 20B.

[0044] Specifically, the higher the resolution of the image displayed by the display device, the better the display effect and the clearer the image. Correspondingly, the control precision requirements for the backlight partitions 210 are higher. Thus, when the resolution of the first display area 10A is greater than that of the second display area 10B, the driving unit can adjust the number of backlight partitions 210 per unit area of ​​the first backlight area 20A to be greater than the number of backlight partitions 210 per unit area of ​​the second backlight area 20B, so as to ensure that the first display area 10A and the second display area 10B meet the corresponding display requirements.

[0045] It should be noted that the specific number of backlight zones 210 per unit area in the first display area 10A and the second display area 10B can be set according to actual needs, and no specific limitation is made here. Because the specific number of backlight zones 210 per unit area in the first display area 10A and the second display area 10B is different, the minimum number of backlight zones 201 contained in the backlight zones 210 in the first display area 10A and the second display area 10B will also be different, and can be set according to actual needs. Figure 4 This is for illustrative purposes only.

[0046] Optional, continue to refer to Figure 1 and Figure 4 The driving unit 22 is used to calculate the amplification factor m1 of the backlight partition 210 in the first backlight area 20A compared to the smallest backlight partition 201 according to the formula m1=α1*(Ld+La*R1) / Ld, and to calculate the amplification factor m2 of the backlight partition 210 in the second backlight area 20B compared to the smallest backlight partition 201 according to the formula m2=α2*(Ld+La*R2) / Ld, and satisfying R1=R2, α1<α2; where Ld is the display device The initial brightness is La, the real-time brightness value of the ambient light is R1, the reflectivity of the first display area in the liquid crystal display panel is R2, the reflectivity of the second display area in the liquid crystal display panel is 0.5%≤R1≤6% and 0.5%≤R2≤6%, α1 is the first perception coefficient and α2 is the second perception coefficient. When the real-time brightness value of the ambient light La=0 lux, α1=α2=1. When the real-time brightness value of the ambient light La>0 lux, 1<α1≤4 and 1<α2≤4.

[0047] Specifically, when the reflectivity R1 of the first display area 10A and the reflectivity R2 of the second display area 10B in the liquid crystal display panel are the same, and the driving unit 22 calculates the amplification factor m1 of the backlight partition 210 in the first backlight area 20A compared to the smallest backlight partition 201 according to m1=α1*(Ld+La*R1) / Ld, and calculates the amplification factor m2 of the backlight partition 210 in the second backlight area 20B compared to the smallest backlight partition 201 according to the formula m2=α2*(Ld+La*R2) / Ld, During the process of increasing the magnification factor m2, by setting α1 < α2, the calculated magnification factor m1 can be made smaller than the magnification factor m2. This ensures that the size of the backlight partition 210 in the adjusted first backlight area 20A is smaller than the size of the backlight partition 210 in the second backlight area 20B. Consequently, the number of minimum backlight partitions 201 contained in the adjusted first backlight area 20A is less than the number of minimum backlight partitions 201 contained in the second backlight area 20B. For example... Figure 4The first backlight area 20A contains four minimum backlight zones 201 in its backlight partition 210, and the second backlight area 20B contains eight minimum backlight zones 201 in its backlight partition 210. This allows for different display resolutions in the first display area 10A and the second display area 10B, satisfying different display needs and effects.

[0048] Based on any of the above embodiments, optionally, Figure 5 This is a schematic diagram of another display device provided in an embodiment of the present invention, with reference to... Figure 5 As shown, the backlight module 20 includes a liquid crystal light control panel 23 and a backlight structure 24. The liquid crystal light control panel 23 is located between the liquid crystal display panel 10 and the backlight structure 24. The liquid crystal light control panel 23 includes a plurality of light control sub-pixels P1. The smallest backlight partition 201 includes at least one light control sub-pixel 230.

[0049] Understandably, the backlight structure 24 may include an array of light-emitting elements. The light emitted from the backlight structure 24 first enters the liquid crystal light control panel 23. The liquid crystal light control panel 23 controls the different light control sub-pixels P1 to have different opening degrees, thereby controlling the light flux transmitted by the different light control sub-pixels P1. Thus, the light flux received by the different display sub-pixels P2 in the liquid crystal display panel 10 is different, realizing pixel-level local backlight adjustment, thereby achieving different display brightness of the different display sub-pixels P2, improving the display contrast of the liquid crystal display panel and the fineness of the displayed image.

[0050] Continue to refer to Figure 5 , Figure 5 An exemplary illustration shows that the minimum backlight partition 201 may include two light-controlling sub-pixels P1, so that the driving unit 22 can adjust the partitioning of multiple light-controlling sub-pixels P1 in the liquid crystal light-controlling panel 23 according to the acquired real-time brightness value, so that the backlight partition 210 includes one or more light-controlling sub-pixels P1, for example, Figure 5 The backlight partition 210 is shown to include two minimum backlight partitions 201, each of which includes two light-controlling sub-pixels P1, meaning that the backlight partition 210 includes four light-controlling sub-pixels P1. For multiple light-controlling sub-pixels P1 within the same backlight partition 210, their activation levels are the same. The activation levels of the light-controlling sub-pixels P1 in different backlight partitions 210 are independently controlled. This allows for independent control of the luminous flux received by the display sub-pixels P2 in the liquid crystal display panel 10, improving the adjustment accuracy of local backlight and avoiding halo phenomena at the boundary between bright and dark displays. Simultaneously, by dynamically adjusting the number of backlight partitions 210 in the liquid crystal light-controlling panel 23, overall power consumption can be reduced.

[0051] It should be noted that, Figure 5The specific relationship between the pixel density of the light-controlling sub-pixel P1 in the liquid crystal light-controlling panel 23 and the pixel density of the display sub-pixel P2 in the liquid crystal display panel 10 can be set according to actual needs. For example, the vertical projection of the display sub-pixel P2 on the liquid crystal light-controlling panel 23 may cover one or more light-controlling sub-pixels P1, or the vertical projection of the light-controlling sub-pixel P1 on the liquid crystal display panel 10 may cover one or more display sub-pixels P2, which can be set according to actual needs.

[0052] Optional, Figure 6 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the liquid crystal display panel 10 includes a third display area 10C and a fourth display area 10D; the liquid crystal light control panel 23 includes a first light control area 23A and a second light control area 23B. The first light control area 23A covers the third display area 10C in a direction perpendicular to the plane of the liquid crystal display panel 23, and the second light control area 23B covers the fourth display area 10D in a direction perpendicular to the plane of the liquid crystal display panel 23; the reflectivity of the third display area 10C is greater than the reflectivity of the fourth display area 10D; under the same ambient light real-time brightness value, the size of the photonic pixel P1 in the first light control area 23A is greater than the size of the photonic pixel P1 in the second light control area 23B.

[0053] Specifically, under the same ambient light real-time brightness value, the greater the reflectivity of the display area, the lower the contrast of the displayed image, making the halo phenomenon less obvious and the less likely the human eye is to see the halo clearly. This can increase the control of the photon pixel P1, reduce the PPI, and thus reduce power consumption and cost.

[0054] For example, Figure 6 The reflectivity of the third display area 10C is greater than that of the fourth display area 10D. The size of the photonic sub-pixel P1 in the first light control area 23A is greater than that in the second light control area 23B. This makes the PPI of the first light control area 23A smaller than that of the second light control area 23B. Thus, under the same ambient light real-time brightness value, the driving unit 22 can also adjust the number of the smallest backlight partitions 201 contained in the backlight partition 210 in the first light control area 23A and the number of the smallest backlight partitions 201 contained in the backlight partition 210 in the second light control area 23B to be different according to the size difference of the photonic sub-pixels in different light control areas. This improves the adjustment accuracy of the local backlight, avoids the halo phenomenon at the boundary between bright and dark display, and reduces the overall power consumption and product cost of the display device.

[0055] It should be noted that, Figure 6 The shape, size, and number of minimum backlight zones 201 shown for the backlight zone 210 are for illustrative purposes only and are not limited thereto.

[0056] Optional, Figure 7 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the backlight structure 24 includes a plurality of light-emitting elements 240; the minimum backlight partition 201 includes a first minimum backlight partition 2011 and a second minimum backlight partition 2012, the first minimum backlight partition 2011 includes at least one light-controlling sub-pixel P1, and the second minimum backlight partition 2012 includes at least one light-emitting element 240; the projection of the light-emitting element 240 on the liquid crystal light-controlling panel 23 overlaps with the light-controlling sub-pixel P1.

[0057] The light-emitting element 240 includes a miniature light-emitting diode, such as a mini LED or micro LED. No specific limitation is made here, and it can be set according to actual needs.

[0058] Specifically, the driving unit 22 can adjust the number of each backlight partition 210, including the first minimum backlight partition 2011, in the liquid crystal light control panel 23 according to the real-time brightness value of the ambient light. This allows the activation degree of the photonic pixels P1 in multiple backlight partitions 210 in the liquid crystal light control panel 23 to be controlled individually. It can also adjust the number of each backlight partition 210, including the second minimum backlight partition 2012, in the backlight structure 24 according to the real-time brightness value of the ambient light. This allows the brightness of the light-emitting elements 240 in multiple backlight partitions 210 in the backlight structure 24 to be controlled individually. In this way, the backlight module 20 of the display device can dynamically adjust the size of the backlight partitions 210 in the liquid crystal display panel 23 simultaneously according to the real-time brightness value of the ambient light. It can also adjust the size of the backlight partitions 210 in the liquid crystal display panel 23 or the size of the backlight partitions 210 in the backlight structure 24 individually, which can be set according to actual needs. This improves the adjustment accuracy of local backlight, avoids halo phenomena at the boundary between bright and dark display, and achieves the beneficial effect of reducing overall power consumption and cost.

[0059] It should be noted that the specific location of the drive unit 22 can be set according to actual needs. Figure 7 This is merely an illustrative example and is not a limitation. Furthermore, the number of photonic sub-pixels P1 in the second minimum backlight zone 2012 and the number of light-emitting elements 240 in the second minimum backlight zone 2012 can be set according to actual needs. Figure 7 This is merely an example illustration, but is not limited to.

[0060] In another alternative embodiment, Figure 8 This is a schematic diagram of the structure of another display device provided in an embodiment of the present invention, as shown below. Figure 8As shown, the backlight module 20 includes a plurality of light-emitting elements 240, and the light-emitting elements 240 include miniature light-emitting diodes; the minimum backlight partition 201 includes at least one miniature light-emitting diode.

[0061] Specifically, the number of miniature light-emitting diodes included in the minimum backlight zone 201 can be set according to actual needs, and is not specifically limited here. Figure 8 This is for illustrative purposes only. By partitioning multiple light-emitting elements 240, the light-emitting elements 240 located in the same backlight partition 210 have the same brightness. The light-emitting elements 240 in different backlight partitions 210 can be controlled individually to improve the adjustment accuracy of local backlight. The number of the smallest backlight partitions 201 contained in the backlight partition 210 can be dynamically adjusted by the driving unit 22 according to the real-time brightness value of the acquired ambient light to adjust the size of the backlight partition 210. This avoids the presence of halos on the displayed screen, improves the display effect, and at the same time reduces the overall power consumption, thereby reducing costs.

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display device, characterized in that, The display device includes a liquid crystal display panel and a backlight module, wherein the backlight module includes a photosensitive unit and a driving unit that are electrically connected. The backlight module includes multiple backlight zones; The photosensitive unit is used to acquire the real-time brightness value of ambient light; The driving unit is used to adjust the number of minimum backlight zones included in each backlight zone according to the real-time brightness value, wherein the minimum backlight zone is the backlight zone when the ambient light brightness value is 0 lux. When the real-time brightness of the ambient light acquired by the photosensitive unit increases, the driving unit adjusts the number of the minimum backlight partitions contained in each backlight partition to increase the size of the backlight partitions and reduce the number of backlight partitions on the backlight module.

2. The display device according to claim 1, characterized in that, The driving unit is used to calculate the magnification factor of the backlight partition relative to the smallest backlight partition based on the real-time brightness value of the ambient light, and adjust the number of the smallest backlight partitions contained in each backlight partition according to the magnification factor.

3. The display device according to claim 2, characterized in that, The driving unit is used according to the formula Calculate the magnification factor m of the backlight zones compared to the smallest backlight zone; Where Ld is the initial brightness of the display device, La is the real-time brightness value of the ambient light, R is the reflectivity of the liquid crystal display panel, 0.5%≤R≤6%, and α is the perception coefficient. When the real-time brightness value of the ambient light La=0 lux, α=1, and when the real-time brightness value of the ambient light La>0 lux, 1<α≤4.

4. The display device according to claim 2, characterized in that, The driving unit is also used to perform according to the formula The number N of the backlight zones is calculated; Where N0 is the number of backlight zones in the backlight module when all of them are the minimum backlight zones, and m is the magnification factor of the backlight zones compared to the minimum backlight zones. This indicates rounding down to the nearest integer.

5. The display device according to claim 4, characterized in that, The liquid crystal display panel includes at least a first display area and a second display area; The backlight module includes at least a first backlight area and a second backlight area, wherein the first backlight area is used to provide a backlight source for the first display area, and the second backlight area is used to provide a backlight source for the second display area. Under the same ambient light real-time brightness value, the display requirements of the first display area and the second display area are different, and the number of backlight zones per unit area of ​​the first backlight area and the number of backlight zones per unit area of ​​the second backlight area are also different.

6. The display device according to claim 5, characterized in that, Under the same ambient light real-time brightness value, when the display detail of the first display area is greater than that of the second display area, the number of backlight zones per unit area of ​​the first backlight area is greater than the number of backlight zones per unit area of ​​the second backlight area.

7. The display device according to claim 6, characterized in that, The driving unit is used according to the formula Calculate the magnification factor m1 of the backlight partition in the first backlight region compared to the smallest backlight partition, and according to the formula Calculate the magnification factor m2 of the backlight partition in the second backlight region compared to the smallest backlight partition, and satisfy R1=R2, α1<α2; Where Ld is the initial brightness of the display device, La is the real-time brightness value of the ambient light, R1 is the reflectivity of the first display area in the liquid crystal display panel, R2 is the reflectivity of the second display area in the liquid crystal display panel, 0.5%≤R1≤6% and 0.5%≤R2≤6%, α1 is the first perception coefficient, α2 is the second perception coefficient, when the real-time brightness value of the ambient light La=0 lux, α1=α2=1, when the real-time brightness value of the ambient light La>0 lux, 1<α1≤4 and 1<α2≤4.

8. The display device according to claim 1, characterized in that, The backlight module includes a liquid crystal light control panel and a backlight structure, wherein the liquid crystal light control panel is located between the liquid crystal display panel and the backlight structure; The liquid crystal light-controlling panel includes multiple light-controlling sub-pixels; The minimum backlight zone includes at least one light-controlling sub-pixel.

9. The display device according to claim 8, characterized in that, The backlight structure includes multiple light-emitting elements; The minimum backlight partition includes a first minimum backlight partition and a second minimum backlight partition. The first minimum backlight partition includes at least one light-controlling sub-pixel, and the second minimum backlight partition includes at least one of the light-emitting elements. The projection of the light-emitting element onto the liquid crystal light-controlling panel overlaps with the light-controlling sub-pixel.

10. The display device according to claim 8, characterized in that, The liquid crystal display panel includes a third display area and a fourth display area; The liquid crystal light control panel includes a first light control area and a second light control area. The first light control area covers the third display area in a direction perpendicular to the plane of the liquid crystal display panel, and the second light control area covers the fourth display area in a direction perpendicular to the plane of the liquid crystal display panel. The reflectivity of the third display area is greater than that of the fourth display area; Under the same ambient light real-time brightness value, the size of the photocontrol sub-pixel in the first light control area is larger than the size of the photocontrol sub-pixel in the second light control area.

11. The display device according to claim 1, characterized in that, The backlight module includes multiple light-emitting elements, including miniature light-emitting diodes; The smallest backlight zone includes at least one miniature light-emitting diode.

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