Display device

Abstract

The utility model provides a display device which comprises a backlight module, the backlight module comprises a substrate, a plurality of first light-emitting units and a plurality of second light-emitting units, the first light-emitting units have first optical characteristics, the second light-emitting units have second optical characteristics, and the first optical characteristics are different from the second optical characteristics. The first light-emitting units and the second light-emitting units are distributed on the substrate in an array mode, and at least one first light-emitting unit is adjacent to the second light-emitting unit. The display panel is arranged on the light emitting side of the backlight module, the display panel comprises a plurality of pixel units distributed in an array mode, and the light emitting area of each first light emitting unit or each second light emitting unit correspondingly covers at least two pixel units. According to the display device, efficient and accurate control in a complex scene can be achieved, meanwhile, energy consumption is reduced, and the energy efficiency ratio is increased.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display device. Background Technology

[0002] With the continuous development of display technology and the increasing diversification of application scenarios, display devices equipped with LED (Light Emitting Diode) technology (such as Mini LED products) are facing unprecedented performance challenges. Mini LED technology significantly improves the contrast and energy efficiency of display devices by shrinking the chip size to 50-200μm and combining it with 1000-10000 level zoning control.

[0003] However, traditional display devices typically employ a single backlight module design, such as direct-lit or edge-lit backlighting, with uniformly spaced light-emitting units (such as LED beads) and consistent optical characteristics (such as emission angle and brightness). This design falls short when dealing with complex display requirements; for example, in scenarios where both high brightness and high contrast need to be ensured simultaneously, traditional designs often struggle to balance the two.

[0004] To address these issues, some advanced display devices have begun to employ local dimming strategies. This strategy uses multiple light-emitting units to form backlight zones, each corresponding to multiple pixel units (e.g., in a 4K display panel, a single zone covers 100 to 200 pixel units), achieving dynamic contrast control through local dimming adjustment. However, while this strategy improves performance, it also increases hardware costs and energy consumption. Utility Model Content

[0005] This application provides a display device that enables efficient and precise control in complex scenarios, while reducing energy consumption and improving energy efficiency ratio.

[0006] This application provides a display device, including:

[0007] A backlight module includes a substrate, a plurality of first light-emitting units and a plurality of second light-emitting units. The first light-emitting units have first optical characteristics, and the second light-emitting units have second optical characteristics. The first optical characteristics and the second optical characteristics are different. The plurality of first light-emitting units and the plurality of second light-emitting units are arrayed on the substrate, and at least one first light-emitting unit and one second light-emitting unit are arranged adjacent to each other.

[0008] The display panel is disposed on the light-emitting side of the backlight module. The display panel includes a plurality of pixel units arranged in an array, and the light-emitting area of ​​each first light-emitting unit or each second light-emitting unit covers at least two of the pixel units.

[0009] In some embodiments, multiple rows of the first light-emitting units and multiple rows of the second light-emitting units are arranged in a periodic alternation.

[0010] In some embodiments, when the size of the display panel is greater than or equal to a preset size, the ratio of the number of rows of the first light-emitting unit to the number of rows of the second light-emitting unit is 1:1; when the size of the display panel is less than the preset size, the ratio of the number of rows of the first light-emitting unit to the number of rows of the second light-emitting unit is 2:1.

[0011] In some embodiments, the first optical characteristic includes a first emission angle, the second optical characteristic includes a second emission angle, and the first emission angle is greater than the second emission angle; wherein the range of the first emission angle is greater than or equal to 30°, and the range of the second emission angle is less than 30°.

[0012] In some embodiments, the first light-emitting unit includes a first light-emitting chip and a first optical component, the first optical component being configured to extend the emitted light angle of the first light-emitting chip to the first emission angle; the second light-emitting unit includes a second light-emitting chip and a second optical component, the second optical component being configured to limit the emitted light angle of the second light-emitting chip to the second emission angle.

[0013] In some embodiments, the first optical component is a reflective lens, the bottom of the first optical component is provided with a first receiving cavity, the first receiving cavity is configured to receive the first light-emitting chip, the top of the first optical component is provided with a first groove, the inner wall of the first groove forms a reflective surface, and the side wall of the first optical component forms a first refractive surface.

[0014] In some embodiments, the second optical component is a refractive lens, the bottom of the second optical component is provided with a second receiving cavity, the second receiving cavity is configured to receive the second light-emitting chip, the top of the second optical component is provided with a second groove, the inner wall of the second groove forms a second refractive surface, and the side wall of the second optical component forms a third refractive surface.

[0015] In some embodiments, the display device further includes a processor electrically connected to the backlight module and the display panel, respectively, and the processor is configured to provide differential signals to the display panel and control commands to the backlight module.

[0016] In some embodiments, the backlight module further includes a backlight control chip, which is electrically connected to the processor, the first light-emitting unit, and the second light-emitting unit, respectively. The backlight control chip is configured to convert control instructions from the processor into execution instructions from the first light-emitting unit and the second light-emitting unit.

[0017] In some embodiments, the display device further includes a power supply electrically connected to the backlight module and the display panel, respectively, and the power supply is configured to provide current signals to the first light-emitting unit, the second light-emitting unit, and the display panel.

[0018] The display device provided in this application includes a backlight module and a display panel. The backlight module includes a substrate, multiple first light-emitting units, and multiple second light-emitting units. The first light-emitting units have first optical characteristics, and the second light-emitting units have second optical characteristics. The first optical characteristics and the second optical characteristics are different. By combining the first and second light-emitting units, the limitations of traditional single backlight module designs are broken, enabling the display device to simultaneously meet the requirements of high brightness and high contrast, significantly improving the display effect in complex scenes. The multiple first light-emitting units and multiple second light-emitting units are arrayed on the substrate, with at least one first light-emitting unit and one second light-emitting unit arranged adjacent to each other. The display panel is disposed on the light-emitting side of the backlight module and includes multiple pixel units arranged in an array. The light-emitting area of ​​each first light-emitting unit or each second light-emitting unit covers at least two pixel units. This arrayed layout optimizes the spatial efficiency of the optical system, allowing the light output of a single light-emitting unit to cover the display requirements of multiple pixel units, thereby achieving a significant reduction in the number of light-emitting units while maintaining pixel-level light control accuracy. As the density of light-emitting units decreases, the number of channels required for the driving circuit and the complexity of the power management module decrease exponentially, directly leading to a reduction in hardware costs and offering advantages such as reduced energy consumption and improved energy efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a first structure of a display device provided in an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of a second structure of the display device provided in an embodiment of this application.

[0022] Figure 3 for Figure 1 A magnified schematic diagram of part A.

[0023] Figure 4 This is a schematic diagram of a scenario provided for an embodiment of this application.

[0024] Figure 5 The backlight module provided in this application has the following light emission states in different regional display modes: (1) light emission state in high brightness display mode; (2) light emission mode in normal display mode; (3) light emission mode in halo suppression mode.

[0025] Figure 6 This is a schematic diagram of the structure of the first optical component provided in the embodiments of this application.

[0026] Figure 7 This is a schematic diagram of the structure of a second optical component provided in an embodiment of this application.

[0027] Figure 8 for Figure 6 Schematic diagram of the cross section at BB.

[0028] Figure 9 for Figure 7 A schematic diagram of the cross-section at CC.

[0029] Figure 10 This is a schematic diagram of a third structure of the display device provided in an embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] This application provides a display device that enables efficient and precise control in complex scenarios, while reducing energy consumption and improving energy efficiency ratio. The following description, in conjunction with the accompanying drawings, provides a detailed explanation.

[0032] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of a first structure of the display device provided in an embodiment of this application. Figure 2 This is a schematic diagram of a second structure of the display device provided in an embodiment of this application.

[0033] This application provides a display device 100, which includes a backlight module 10 and a display panel 20.

[0034] The backlight module 10 is a key component of the display device 100. Its main function is to provide uniform and stable light to the display panel 20, enabling the display panel 20 to display images normally. The backlight module 10 is typically composed of components such as a light source (e.g., light-emitting diodes, LEDs), a light guide plate, and optical films. By rationally designing the structure and layout of each component, effective control and uniform output of light can be achieved.

[0035] The backlight module 10 includes a substrate 11, multiple first light-emitting units 12, and multiple second light-emitting units 13. The substrate 11 is made of flexible printed circuit board (FPC) or glass substrate 11, which not only builds an electrical interconnection bridge for the light-emitting units, but also provides a stable mechanical support. High-precision metal traces are arranged on the surface of the substrate 11, which effectively ensures the stability of signal transmission.

[0036] The first light-emitting unit 12 and the second light-emitting unit 13 each have unique optical characteristics, and they are distinct from each other. Specifically, the first light-emitting unit 12 has a first optical characteristic, while the second light-emitting unit 13 has a second optical characteristic. For example, the first optical characteristic can manifest as wide-angle light emission, where the light can diffuse in all directions; the second optical characteristic manifests as narrow-angle light emission, where the light is more concentrated and can be emitted precisely.

[0037] Multiple first light-emitting units 12 and multiple second light-emitting units 13 are arrayed on the substrate 11, with at least one first light-emitting unit 12 and at least one second light-emitting unit 13 arranged adjacent to each other. By combining the first light-emitting unit 12 and the second light-emitting unit 13, the limitations of the traditional single backlight module 10 design are broken, enabling the display device 100 to simultaneously meet the requirements of high brightness and high contrast, and significantly improving the display effect in complex scenes.

[0038] The display panel 20 is disposed on the light-emitting side of the backlight module 10, and the display panel 20 includes a plurality of pixel units 21 arranged in an array.

[0039] The display panel 20 refers to the core component used to realize the image display function. It is usually composed of a large number of pixel units 21 arranged in a specific pattern. Complete image information is presented by controlling the light emission state (such as brightness, color, etc.) of each pixel unit 21. There are various types of display panels 20, such as liquid crystal display panels 20 and organic light-emitting diode display panels 20 (OLED panels), which are widely used in various display devices 100 (such as mobile phones, televisions, tablet computers, etc.).

[0040] Pixel unit 21 is the smallest imaging unit of display panel 20. Each pixel unit 21 is typically composed of three sub-pixels: red (R), green (G), and blue (B). By independently controlling the light emission intensity of each sub-pixel, different colors can be mixed to form a rich and colorful image. The arrangement and density of pixel units 21 directly affect the resolution, display effect, and other performance indicators of display panel 20.

[0041] In the backlight module 10, the first light-emitting unit 12 and the second light-emitting unit 13 convert electrical energy into light energy by exciting the light-emitting material with electrical energy. Their optical characteristics (such as emission angle, brightness, color temperature, etc.) play a decisive role in the overall performance of the backlight module 10.

[0042] The array layout of multiple pixel units 21 is a mature technology that has been proven through long-term practice and is widely adopted. Its advantage lies in its ability to achieve high-precision image display through regular pixel arrangement. Each pixel unit 21, as the basic imaging unit of the display panel 20, is responsible for displaying specific colors and brightness. In color display, the pixel unit 21 is usually composed of three sub-pixels: red, green, and blue. By precisely controlling the luminous intensity of these three sub-pixels, based on the principle of three primary colors mixing, more than 16 million colors can be displayed, thereby meeting the human eye's need for rich colors.

[0043] For example, in the display panel 20 of a high-definition television, the array density of pixel units 21 is extremely high, typically measured in pixels per inch (PPI). Television products can achieve PPIs of hundreds or even thousands, meaning that a large number of pixel units 21 are distributed within a very small display area, thus enabling a delicate and realistic image display effect.

[0044] In this embodiment, a higher quality light source is provided to the display panel 20 by combining a first light-emitting unit 12 and a second light-emitting unit 13 with different optical properties. The light-emitting area of ​​each first light-emitting unit 12 or each second light-emitting unit 13 covers at least two pixel units 21.

[0045] From an optical principle perspective, the traditional layout of a single light-emitting unit corresponding to a single pixel unit 21, while achieving relatively precise pixel-level light control, results in an excessive number of light-emitting units, leading to a series of problems. For example, increasing the number of light-emitting units significantly increases the number of channels in the driving circuit, resulting in increased hardware costs, higher circuit complexity, and also increasing the burden on the power supply, thus reducing the system's energy efficiency ratio.

[0046] In this application, the light-emitting area of ​​each light-emitting unit covers at least two pixel units 21. By rationally planning the layout and optical characteristics of the light-emitting units, the number of light-emitting units can be significantly reduced while ensuring pixel-level light control accuracy. Taking a display panel 20 with a resolution of 1920×1080 as an example, if a traditional layout method is used, millions of light-emitting units may be required; however, using the layout method of this application, the number of light-emitting units can be reduced by 30% to 50%. This not only reduces hardware costs but also simplifies the design of driving circuits and power supplies, and improves the stability and reliability of the system.

[0047] Furthermore, from a practical application perspective, this design optimizes the spatial efficiency of the optical system. The light emitted by the light-emitting units, after being modulated by the display panel 20, can more evenly illuminate multiple pixel units 21, reducing light loss during transmission and improving luminous efficiency. Simultaneously, due to the reduced number of light-emitting units, interference between adjacent units is correspondingly reduced, further enhancing the contrast and color uniformity of the displayed image. This allows the display device 100 to present clearer and more realistic image effects in complex scenarios (such as high-brightness environments and high-contrast image displays).

[0048] For example, in a 32-inch display module, the display module has an OD (Optical Distance) of 8mm and 516 partitions, corresponding to 516 light-emitting units (264 first light-emitting units 12 and 252 second light-emitting units 13) covering multiple pixel units 21. It can adapt to complex scenes (such as local highlighting and halo suppression). By adjusting the duty cycle of light-emitting units with different light types, it can optimize the performance of halo and dark details.

[0049] Please see Figure 1 as well as Figure 3 , Figure 3 for Figure 1 A magnified schematic diagram of part A. In some embodiments, multiple rows of first light-emitting units 12 and multiple rows of second light-emitting units 13 are arranged in a periodic alternating pattern. Periodic alternating arrangement refers to a layout in which the first light-emitting units 12 and the second light-emitting units 13 are arranged in a repeating pattern and order, with multiple rows as the unit. This periodic alternating arrangement enables the regular distribution of regions with different optical characteristics, allowing the backlight module 10 to flexibly adjust the optical performance of each region according to different display scenarios and requirements, thereby optimizing the overall display effect.

[0050] For example, the first light-emitting unit 12 in row 22 and the second light-emitting unit 13 in row 21 are arranged alternately to ensure that the optical characteristics of different areas (such as the light-expanding range or the light-focusing accuracy) can be flexibly switched according to the needs of the scene. The alternating arrangement can ensure that the optical characteristics of different areas in the backlight module 10 (such as the light-expanding range or the light-focusing accuracy) can be flexibly switched according to the actual needs of the scene.

[0051] In practical applications, display scenarios are complex and diverse. Some scenarios require large-area uniform illumination, such as when watching nature documentaries, where the display panel 20 needs a large light-expanding range to ensure the brightness uniformity of the entire image (brightness uniformity refers to the consistency of brightness distribution across different areas of the display panel 20 surface, usually measured by indicators such as the percentage or standard deviation of brightness differences. The better the brightness uniformity, the better the overall visual effect of the displayed image). Other scenarios, however, have higher requirements for localized high-precision illumination, such as when displaying text, icons, or high-contrast images, requiring high focusing precision to ensure clear edges and no halo effect. Through this periodic alternating arrangement, the first light-emitting unit 12 and the second light-emitting unit 13 can each leverage their advantages, adjusting the optical characteristics of each area in real time according to the scene requirements, thereby meeting diverse display needs.

[0052] Specifically, when the size of the display panel 20 is greater than or equal to a preset size, the ratio of the number of rows of the first light-emitting unit 12 to the number of rows of the second light-emitting unit 13 is 1:1. When the size of the display panel 20 is smaller than the preset size, the ratio of the number of rows of the first light-emitting unit 12 to the number of rows of the second light-emitting unit 13 is 2:1. The preset size is a pre-set size threshold that distinguishes the ratio of the number of rows of light-emitting units under different display panel 20 sizes. Using the preset size as a judgment criterion, the backlight module 10 can adopt the most suitable ratio of the number of rows of light-emitting units for display panels 20 of different sizes, so as to achieve the best display effect and performance balance.

[0053] The preset size can be 32 inches. For example, when the size of the display panel 20 is greater than or equal to 32 inches, a 1:1 ratio is used, such as 12 rows of first light-emitting units 12 and 12 rows of second light-emitting units 13. This ratio setting has significant advantages in balancing halo suppression and brightness uniformity.

[0054] In large-size display panels 20, due to the large display area and long light propagation distance, uneven brightness and halo phenomena are prone to occur. The larger emission angle of the first light-emitting unit 12 enables the light to diffuse more widely, illuminating a larger area of ​​the display panel 20 and helping to improve brightness uniformity; while the smaller emission angle of the second light-emitting unit 13 can provide a high-precision light-focusing effect in specific areas (such as the edges of high-contrast images), effectively suppressing the generation of halo.

[0055] By using a 1:1 row ratio, the two types of light-emitting units work together to ensure uniform overall screen brightness while significantly reducing halo effects and improving image clarity and contrast. Taking large commercial or home displays as an example, when playing advertisements, the screen contains both large background images and high-brightness text and icons. This 1:1 row ratio, periodically alternating arrangement ensures uniform background image brightness, sharp edges for text and icons, and eliminates halo interference, presenting viewers with a high-quality display effect.

[0056] When the size of the display panel 20 is smaller than a preset size, such as when it is used in portable display devices such as smartphones and tablets, the ratio of the number of rows of the first light-emitting unit 12 to the number of rows of the second light-emitting unit 13 is adjusted to 2:1. For example, when the size of the display panel 20 is less than 32 inches, a 2:1 ratio is used, such as 16 rows of the first light-emitting unit 12 and 8 rows of the second light-emitting unit 13. In small-sized display panels 20, due to the relatively small display area, the requirements for image detail and brightness uniformity are higher, while hardware cost and space constraints also need to be considered. By increasing the ratio of the number of rows of the first light-emitting unit 12, its larger emission angle is used to achieve uniform diffusion of light in a smaller space, ensuring the brightness consistency of each area of ​​the display panel 20; while appropriately reducing the ratio of the number of rows of the second light-emitting unit 13, while ensuring that key areas (such as text and icon display areas) have a certain halo suppression capability, the hardware cost and the complexity of the backlight module 10 are reduced.

[0057] Taking smartphones as an example, in daily use, users need to view screen content in different scenarios, such as browsing web pages, watching videos, and playing games. When displaying web pages, the screen needs to have good brightness uniformity to ensure clear display of text and images; while when playing games that require high-contrast graphics, it is necessary to effectively suppress glare to ensure the realism and immersion of the game graphics. By adopting a periodic alternating arrangement with a 2:1 row-to-row ratio, the first light-emitting unit 12 can fully illuminate most areas of the display panel 20, ensuring brightness uniformity; the second light-emitting unit 13 plays a role in key areas, reducing glare and meeting the user's needs in different scenarios.

[0058] The first optical characteristic includes a first emission angle, and the second optical characteristic includes a second emission angle, wherein the first emission angle is greater than the second emission angle. The first emission angle ranges from 30° to 30° (e.g., 30°, 40°, 50°, 60°, 70°, or 80°), and the second emission angle ranges from less than 30° (e.g., 2°, 5°, 10°, 20°, 25°, or 29°). This differentiated emission angle design provides a basis for adjusting the optical characteristics of different regions. It should be noted that although 30° is used as the dividing threshold between the large angle (first emission angle) and the small angle (second emission angle) in the aforementioned embodiment, this threshold can be flexibly adjusted according to the needs of the scenario in practical applications. For example, in other embodiments, 45°, 50°, or 60° can also be used as the dividing standard. This parametric design can adapt to a wider range of optical system requirements.

[0059] It is worth noting that the emission angle refers to the range of angles formed between the light emitted by the light-emitting unit and the central axis of the light-emitting unit as the light propagates in space. Within this angle range, the light intensity of the light-emitting unit reaches a certain proportion (usually the angle range corresponding to the full width at half maximum), which is a key parameter for measuring the directionality of light propagation in the light-emitting unit. Different emission angles determine the diffusion range and intensity distribution of light in space. The large emission angle of the first light-emitting unit 12 and the small emission angle of the second light-emitting unit 13 are suitable for different display areas and scene requirements to achieve specific optical effects.

[0060] The first light-emitting angle is suitable for conventional display modes. In areas suitable for conventional display modes, high focusing precision is not required; instead, the light needs to uniformly cover a large area to provide stable background brightness. For example, when displaying a landscape photograph, the background area of ​​the photograph usually requires uniform lighting. The large-angle optical characteristics of the first light-emitting unit 12 can meet this requirement, making the background colors vibrant and the transitions natural.

[0061] The second emission angle is suitable for halo suppression mode. In areas suitable for halo suppression mode, high precision in light focusing is required, necessitating that the light be concentrated on a specific area to reduce light scattering and spillage. For example, when displaying text or icons, edge sharpness is crucial. The small-angle optical characteristics of the second emission unit 13 allow light to accurately illuminate the text or icons, reducing halo interference from surrounding areas and improving image sharpness and readability. Halo suppression refers to reducing or eliminating unexpected bright edges or halos in the displayed image caused by light scattering or spillage, thereby improving image sharpness and contrast. Halo phenomena severely affect the quality of the displayed image, especially when displaying high-contrast images or text. Halo causes blurred edges, loss of detail, and a reduced viewing experience. Therefore, effective halo suppression technology is crucial for improving display quality.

[0062] In practical applications, this design based on the difference in light emission angle can be flexibly switched according to different display needs. For example, when local high brightness is required, such as displaying the highlights in a video or the special effects area in a game, the large-angle light pattern is fully open, and the light emitted by the first light emission unit 12 can cover a wider area, so that the local area can obtain higher brightness and enhance the visual impact; in halo-sensitive areas, such as displaying the edges of text, icons or high-contrast images, the small-angle light pattern dominates, and the second light emission unit 13 can effectively reduce light spill, ensure clear edges and no halo, and improve the overall quality of the picture.

[0063] For details, please refer to Figure 4 as well as Figure 5 , Figure 4 This is a schematic diagram of a scenario provided for an embodiment of this application. Figure 5 The backlight module provided in this application has the following light emission states in different area display modes: (1) light emission state in high brightness display mode; (2) light emission mode in normal display mode; and (3) light emission mode in halo suppression mode. Within the same screen, different area display modes can be obtained by dividing the display content into different areas.

[0064] like Figure 4 as well as Figure 5 In (1), if the area display mode is high-brightness display mode a, the luminous intensity of the first luminous unit 12 and the second luminous unit 13 is controlled to be greater than or equal to the preset intensity. In high-brightness display mode a, the first luminous unit 12 with a large angle and the second luminous unit 13 with a small angle both operate at 100% luminous intensity to ensure that information is clearly visible under various lighting conditions.

[0065] like Figure 4 as well as Figure 5 In (2), if the area display mode is the normal display mode b, the light intensity of the first light-emitting unit 12 is controlled to be greater than the preset intensity and the light intensity of the second light-emitting unit 13 is controlled to be less than the preset intensity. In the normal display mode b, the first light-emitting unit 12 with a large angle provides uniform backlight with 80% brightness, and the second light-emitting unit 13 with a small angle assists in details with 30% brightness.

[0066] like Figure 4 as well as Figure 5 In (3), if the area display mode is halo suppression mode c, the light intensity of the first light-emitting unit 12 is controlled to be less than the preset intensity and the light intensity of the second light-emitting unit 13 is greater than or equal to the preset intensity. In halo suppression mode c, the brightness of the first light-emitting unit 12 at a large angle is reduced to 20%, and the brightness of the second light-emitting unit 13 at a small angle is focused on the edge of the information at 90% brightness to avoid reflection and blurring.

[0067] In summary, this application achieves flexible adjustment of the optical characteristics of the backlight module 10 under different display scenarios and sizes by periodically alternating multiple rows of first light-emitting units 12 and multiple rows of second light-emitting units 13, adjusting the row ratio according to the size of the display panel 20, and combining the reasonable application of light-emitting units with different light-emitting angles. This significantly improves the display effect and performance of the display device 100.

[0068] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a first optical component provided in an embodiment of this application. In some embodiments, the first light-emitting unit 12 includes a first light-emitting chip and a first optical component 122. The first optical component 122 is configured to extend the emitted light angle of the first light-emitting chip to a first emission angle, suitable for conventional display mode b. The first light-emitting chip and the second light-emitting chip are the core light-emitting components of the first light-emitting unit 12 and the second light-emitting unit 13, respectively. Based on the semiconductor light-emitting principle, they generate photons by releasing energy through electron-hole recombination, and are the initial source of light.

[0069] In conventional display mode b, such as when playing ordinary movies or browsing the web, a large area of ​​uniform light coverage is required to ensure the overall brightness and color uniformity of the image. The first optical component 122, by effectively expanding the angle of the light emitted from the first light-emitting chip, enables the light to uniformly illuminate the corresponding area of ​​the display panel 20, thus meeting this requirement. For example, when displaying a colorful natural landscape painting, the image contains both large areas of sky and grass as background and some objects with rich details. The light emitted by the first light-emitting unit 12 can uniformly illuminate the entire image, making the color transitions natural and the details clearly visible.

[0070] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a second optical component provided in an embodiment of this application. The second light-emitting unit 13 includes a second light-emitting chip and a second optical component 132. The second optical component 132 is configured to limit the emitted light angle of the second light-emitting chip to a second emission angle, which is suitable for halo suppression mode c, reducing light scattering and overflow, and avoiding light interference from adjacent areas. For example, when displaying a starry sky scene, the second optical component 132 can reduce light interference from adjacent star points.

[0071] In halo suppression mode c, when displaying high-contrast images, text, or specific special effects, it is necessary to strictly control the propagation range of light to avoid interference between light from adjacent areas, which would cause halo phenomena and affect the clarity and contrast of the image. The second optical component 132, by precisely limiting the angle of light emitted from the second light-emitting chip, can effectively reduce light overflow, ensuring a clear brightness difference between adjacent areas and improving the image's sense of depth and clarity. For example, when displaying a starry sky scene, the image contains many bright stars. If the light is not properly controlled, halos can easily form between adjacent stars, making them appear blurry and affecting the visual effect. The application of the second optical component 132 can significantly reduce light interference between adjacent stars, allowing each star to be clearly and independently presented, creating a realistic starry sky effect.

[0072] Please refer to Figure 8 , Figure 8 for Figure 6 A cross-sectional schematic diagram at BB. The first optical component 122 is a reflective lens. A reflective lens is a lens structure that changes the direction of light propagation through a reflecting surface 1223. Its working principle is mainly based on the law of reflection of light on the surface of a medium. By reasonably designing the shape and angle of the reflecting surface 1223, the convergence and diffusion of light can be controlled. Reflective lenses have high light energy utilization efficiency and can reduce light absorption loss inside the lens.

[0073] The bottom of the first optical component 122 is provided with a first receiving cavity 1221, which is configured to accommodate a first light-emitting chip. This design ensures that the first light-emitting chip is securely mounted inside the reflective lens, guaranteeing stable light emission. The top of the first optical component 122 is provided with a first groove 1222, the inner wall of which forms a reflective surface 1223, and the sidewall of the first optical component 122 forms a first refractive surface 1224. The first refractive surface 1224 formed by the sidewall of the reflective lens and the top reflective surface 1223 work together to achieve the control of light.

[0074] In Fresnel loss optimization design, uniform light diffusion is achieved through specific curvatures (such as the Bézier curve equation). The Bézier curve equation offers flexible shape control, allowing for precise design of the curvature of the reflecting surface 1223 and the refracting surface according to actual needs, ensuring that light is evenly distributed in the desired area after reflection and refraction. This design effectively reduces energy loss during reflection and refraction, improving light energy utilization. For example, in traditional lens designs, due to Fresnel loss, some light is reflected off the lens surface and fails to reach the display panel 20, resulting in reduced screen brightness. However, a reflective lens designed using the Bézier curve equation allows light to propagate more efficiently, reducing reflection loss and achieving higher screen brightness with the same input power.

[0075] Reflective lenses are suitable for scenes requiring high brightness and controllable halo, such as direct sunlight in HDR (High Dynamic Range) videos. In HDR videos, the directly sunlight area typically has extremely high brightness, requiring the backlight module 10 to provide sufficient light intensity to accurately reproduce this scene. Simultaneously, to create realistic lighting effects, precise halo control is necessary to prevent excessive light diffusion from the directly sunlight area into surrounding areas, affecting the contrast and depth of the image. Reflective lenses, through their unique optical design, can effectively control halo generation while ensuring high brightness. When the first light-emitting chip emits light, the light is first refracted by the sidewall refraction surface, initially changing its propagation direction; then it reaches the top reflective surface 1223, where it is reflected again, changing direction once more, and finally diffuses out at a uniform angle, illuminating the corresponding area on the display panel 20. This light propagation method ensures that the directly sunlight area receives sufficient light, while the light intensity in the surrounding area is relatively low, thus achieving a perfect combination of high brightness and controllable halo, presenting users with a stunning HDR visual effect.

[0076] Please see Figure 9 , Figure 9 for Figure 7 A cross-sectional view at CC. The bottom of the second optical component 132 has a second receiving cavity 1321, configured to accommodate the second light-emitting chip, ensuring its stable installation. The top of the second optical component 132 has a second groove 1322, the inner wall of which forms a second refractive surface 1323, and the sidewalls of the second optical component 132 form a third refractive surface 1324. The refractive lens limits the angle of light through the refractive surface (such as a hyperboloid design) of the second groove 1322 at the top. The hyperboloid has unique geometric properties, enabling precise refraction control of light in different directions, thereby limiting the propagation range of light to a small angle.

[0077] For example, when displaying details in dark areas, such as dark textures in a night scene, the backlight module 10 needs to precisely control the distribution of light to reduce stray light and improve dark contrast. Stray light refers to light that does not propagate in the expected direction but is scattered to other areas, reducing the contrast of dark areas and making dark details blurry. The refractive lens, through the hyperboloid refractive surface of its second groove 1322 at the top, can precisely converge and limit the angle of light, concentrating the light mainly on the area to be illuminated and reducing scattering to surrounding areas. When the second light-emitting chip emits light, the light is first initially refracted through the second refractive surface 1323 of the second groove 1322 at the top, and then further adjusted in direction by the third refractive surface 1324 on the side wall, finally exiting at a smaller angle to illuminate the dark areas on the display panel 20. This light control method effectively reduces the generation of stray light, allowing dark textures to be clearly presented, greatly improving dark contrast and making night scene images more realistic and vivid.

[0078] In summary, this application, through the unique design of the first light-emitting unit 12 and the second light-emitting unit 13, and the ingenious application of reflective and refractive lenses in the first optical component 122 and the second optical component 132, achieves precise control of light in different display areas, effectively improving the display effect of the display device 100 in various scenarios, and has significant technological innovation and practical application value.

[0079] In some embodiments, please refer to Figure 10 , Figure 10 This is a third structural schematic diagram of the display device provided in the embodiments of this application. The display device 100 also includes a processor 30, which is the core control center responsible for processing various types of data and instructions and coordinating the orderly operation of various components. The processor 30 can be a system-on-a-chip (SoC). As a highly integrated processor 30, the SoC integrates multiple functional modules such as a central processing unit (CPU), a graphics processing unit (GPU), and a digital signal processor (DSP), possessing powerful computing and data processing capabilities.

[0080] The processor 30 is electrically connected to both the backlight module 10 and the display panel 20. The processor 30 is configured to provide differential signals (V-by-one) to the display panel 20 and control commands to the backlight module 10. Differential signaling is a signaling method that uses two complementary signal lines to transmit information; the signal amplitudes on the two lines are equal, but their phases are opposite. The receiving end reconstructs the original signal by comparing the voltage difference between these two signal lines. The application of differential signals significantly improves the performance of the display device 100. During the process of the display panel 20 receiving image data, differential signals, with their strong anti-interference capabilities, can effectively resist external electromagnetic interference and noise during signal transmission. Taking industrial monitoring scenarios as an example, monitoring rooms contain a large number of electronic devices, creating a complex electromagnetic environment. Traditional single-ended signals are easily interfered with in such environments, leading to errors in the image data received by the display panel 20, and problems such as flickering and blurring of the image. The differential signal restores the original signal through the voltage difference between two complementary signal lines. Even if one signal line is interfered with, the other signal line can provide the opposite interference information. The two cancel each other out, thereby ensuring the accuracy and stability of the image data received by the display panel 20, ensuring that the monitoring screen is clear and distortion-free, and providing a reliable guarantee for the safety monitoring of industrial production.

[0081] The processor 30 can quickly and accurately analyze the characteristics of the displayed content, including brightness distribution, contrast, and color information. For example, when displaying a complex PDF (Power Density Function) pattern containing numerous charts, text, and images—meaning the image has high-contrast areas, fast-moving scenes, or mixed lighting—the processor 30 can identify bright and dark areas in real time and generate corresponding control commands based on this information. By dynamically adjusting the instructions of the backlight control chip 40 via the SPI (Serial Peripheral Interface) signal, high-speed, real-time communication between the processor 30 and the backlight module 10 is achieved. The efficient transmission characteristics of the SPI signal enable the processor 30 to promptly transmit detected changes in the displayed content to the backlight control chip 40, ensuring that the backlight module 10 can respond quickly and adjust the light-emitting state of the light-emitting units to adapt to different display requirements.

[0082] Taking dynamic games as an example, game screens often feature rapidly changing scenes and objects, with the distribution of bright and dark areas constantly shifting. The processor 30 can quickly switch the current duty cycle of large / small angle light patterns to optimize real-time halo effects. When bright explosion effects or highlighted objects appear in the screen, the processor 30 rapidly increases the current duty cycle of the corresponding light-emitting units, causing them to emit stronger light and highlighting details in the bright areas; simultaneously, it decreases the current duty cycle of the light-emitting units in surrounding areas to reduce light overflow and prevent halo formation. This rapid and precise dynamic adjustment capability makes the game screen clearer and more realistic, greatly enhancing the user's gaming experience. For example, in competitive games, players can more clearly observe changes in detail in the game scene, improving reaction speed and win rate.

[0083] Please continue reading for more details. Figure 10 The backlight module 10 also includes a backlight control chip 40, which is the core control component of the backlight module 10. It receives control commands from the processor 30 and converts them into LED driving signals executable by the first light-emitting unit 12 and the second light-emitting unit 13. The backlight control chip 40 achieves dynamic adjustment of the backlight brightness and optical characteristics by precisely controlling parameters such as the current and voltage of the light-emitting units.

[0084] The backlight control chip 40 is electrically connected to the processor 30, the first light-emitting unit 12, and the second light-emitting unit 13, respectively. The backlight control chip 40 is configured to convert the control instructions of the processor 30 into execution instructions of the first light-emitting unit 12 and the second light-emitting unit 13.

[0085] The main function of the backlight control chip 40 is to convert the control instructions of the processor 30 into execution instructions for the first light-emitting unit 12 and the second light-emitting unit 13. Specifically, this involves converting the instructions of the processor 30 into LED driving signals. The LED driving signal is the core signal for controlling the light emission of the light-emitting unit, and it contains key information such as the brightness and emission time of the light-emitting unit. By precisely controlling the LED driving signal, the backlight control chip 40 can achieve independent control of the first light-emitting unit 12 and the second light-emitting unit 13, meeting the different backlight requirements of different display areas.

[0086] For example, in halo suppression mode c, the control requirements for light are more stringent in this area, requiring less light spillage and avoiding light interference from adjacent areas. The backlight control chip 40, according to instructions from the processor 30, can reduce the current duty cycle of the first light-emitting unit 12 to 30% while simultaneously increasing the current duty cycle of the second light-emitting unit 13 to 70%. This differentiated current control strategy ensures that halo suppression mode c receives sufficient light to highlight details in dark areas and prevents loss of details due to insufficient light, while also effectively limiting the light intensity of the first light-emitting unit 12 and reducing light scattering to surrounding areas. This achieves the dual goals of preserving dark details and suppressing halo effects. Taking a night scene display as an example, the image contains some faint lights and a deep night sky. Through precise adjustment of the current duty cycle of the first and second light-emitting units 12 by the backlight control chip 40, the light areas are made bright and clear, and the night sky areas are made dark and deep, greatly improving the contrast and depth of the image and presenting a more realistic night scene effect to the user.

[0087] In summary, this application achieves dynamic and precise control of the backlight module 10 through the collaborative work of the processor 30 and the backlight control chip 40, effectively optimizing the display effect of the display device 100 in different display scenarios, and has made significant technical breakthroughs, especially in halo suppression and dark detail preservation.

[0088] In some embodiments, please continue reading Figure 10 The display device 100 also includes a power supply 50, which is a core component responsible for converting externally input electrical energy into current and voltage signals suitable for use by various components such as the backlight module 10 and the display panel 20. It is typically composed of a power supply management chip, a transformer, a filter circuit, a voltage regulator circuit, etc., and has multiple functions such as voltage conversion, current regulation, overvoltage protection, and overcurrent protection to ensure that each component works in a stable and safe electrical environment.

[0089] Power supply 50 is electrically connected to both the backlight module 10 and the display panel 20. Power supply 50 is configured to provide current signals, such as direct current (DC), to the display panel 20, the first light-emitting unit 12, and the second light-emitting unit 13 to meet the power requirements of different display areas and display states. A current signal is an electrical signal that transmits information through the magnitude and direction of the current. In the display device 100, the current signals provided by power supply 50 to the backlight module 10, the first light-emitting unit 12, and the second light-emitting unit 13 are key parameters for controlling their brightness and operating state. By adjusting parameters such as the magnitude and duty cycle of the current signal, the light intensity and duration of the light-emitting units can be precisely controlled, thereby achieving dynamic adjustment of the brightness and contrast of the displayed image. In pulse width modulation (PWM) dimming technology, the duty cycle refers to the ratio of the time the signal is at a high level (or in an active state) to the total cycle time, usually expressed as a percentage. In the display device 100, the duty cycle is used to control the light emission time of the light-emitting unit in the backlight module 10, thereby achieving the adjustment of the light emission brightness.

[0090] For example, in high-brightness display mode a, the first light-emitting unit 12 and the second light-emitting unit 13 are powered simultaneously with a 100% duty cycle to achieve peak brightness.

[0091] In the displayed image, the high-brightness display mode a often carries important visual information and needs to be presented with high brightness to highlight the display effect. This application addresses this need by designing a unique power supply strategy. When the display device 100 detects the high-brightness display mode a, the power supply 50 simultaneously provides a 100% duty cycle current signal to the first light-emitting unit 12 and the second light-emitting unit 13.

[0092] This power supply method allows the first light-emitting unit 12 and the second light-emitting unit 13 to operate at maximum power simultaneously, releasing their full light-emitting capacity to achieve peak brightness output. For example, when playing high-definition video, if bright explosion effects or bright objects appear on the screen, the display device 100 can quickly identify these high-brightness display modes a and immediately adjust the power supply parameters of the power supply 50, so that the first light-emitting unit 12 and the second light-emitting unit 13 simultaneously reach a 100% duty cycle operating state. At this time, the strong light emitted by the two light-emitting units superimposes on each other, greatly improving the brightness in high-brightness display mode a, making details clearer, colors more vibrant, and presenting users with a stunning visual effect.

[0093] From a technical perspective, the simultaneous high duty cycle power supply of the first light-emitting unit 12 and the second light-emitting unit 13 can fully utilize the light-emitting capabilities of the two units, enhancing the brightness in high-brightness display mode a through the superposition of light. Furthermore, due to the adoption of PWM dimming technology, 100% duty cycle power supply does not mean that the current is always at its maximum value, but rather that it remains at a high level within a cycle. This ensures high brightness output from the light-emitting units while also reducing heat generation and extending their lifespan to some extent.

[0094] For example, in the conventional display mode b, only the first light-emitting unit 12 operates at an 80% duty cycle, reducing power consumption.

[0095] Unlike the high-brightness display mode a, the brightness requirement is relatively low in the conventional display mode b. To reduce power consumption, this application adopts a differentiated power supply strategy. In the conventional display mode b, the power supply 50 provides an 80% duty cycle current signal to the first light-emitting unit 12, while the second light-emitting unit 13 is in a low-power or off state.

[0096] This power supply method effectively reduces power consumption while maintaining display clarity in the conventional display mode b. The first light-emitting unit 12 operates with an 80% duty cycle, and its brightness meets the needs of conventional display while reducing unnecessary energy consumption. The off or low-power state of the second light-emitting unit 13 further reduces the power consumption of the entire backlight module 10. For example, when reading electronic documents or browsing web pages, most of the display area is in the conventional display mode b. By adopting this power supply strategy, the power consumption of the display device 100 can be significantly reduced, thereby extending the device's battery life.

[0097] In practice, the 80% duty cycle power supply method achieved a good balance in the application of conventional display mode b. On the one hand, it ensured the brightness and contrast of the displayed image, allowing users to clearly read text and view images; on the other hand, by reducing the duty cycle, it reduced the working time of the light-emitting units, thus reducing heat generation and energy consumption. Furthermore, this differentiated power supply strategy can be adjusted in real time according to the dynamic changes in the displayed content. When the brightness requirements of certain parts in conventional display mode b change, the power supply 50 can quickly adjust the power supply parameters to ensure the stability and consistency of the display effect.

[0098] For example, in halo suppression mode c, only the second light-emitting unit 13 operates at an 80% duty cycle, reducing power consumption.

[0099] Unlike the high-brightness display mode a, the halo suppression mode c needs to suppress the halo, so the light intensity of the second light-emitting unit 13 at a small angle is increased, while the first light-emitting unit 12 is in a low-power or off state.

[0100] This power supply strategy effectively solves the technical problem of halo diffusion in high-contrast images by precisely allocating the load of the light-emitting units. In halo suppression mode c, when the display device 100 detects the coexistence of a dark background and a bright object (such as the bright moon in the starry sky, streetlights in a night scene, or bright spots in the image), the power supply 50 can cut off the power supply to the first light-emitting unit 12, while simultaneously increasing the duty cycle of the second light-emitting unit 13 to 80%. At this time, the narrow-angle beam characteristics of the second light-emitting unit 13 are fully activated, and its light intensity distribution curve forms a steep brightness peak within a viewing angle of less than 60°, precisely covering the area where the bright object is located, while the reduced light intensity of the first light-emitting unit 12 can prevent the overflow of light at large angles.

[0101] In summary, this application achieves high-brightness display in high-brightness display mode a and low-power operation in conventional display mode b through the intelligent power supply strategy of power supply 50 to the first light-emitting unit 12 and the second light-emitting unit 13 in the backlight module 10. This technical solution not only improves the display effect of the display device 100, enhances the sense of layering and visual impact of the picture, but also significantly reduces power consumption, which is in line with the trend of energy conservation and environmental protection.

[0102] The display device 100 provided in this application embodiment includes a backlight module 10 and a display panel 20. The backlight module 10 includes a substrate 11, a plurality of first light-emitting units 12, and a plurality of second light-emitting units 13. The first light-emitting units 12 have first optical characteristics, and the second light-emitting units 13 have second optical characteristics. The first optical characteristics and the second optical characteristics are different. By combining the first light-emitting units 12 and the second light-emitting units 13, the limitations of the traditional single backlight module 10 design are broken, enabling the display device 100 to simultaneously meet the requirements of high brightness and high contrast, significantly improving the display effect in complex scenes. The plurality of first light-emitting units 12 and the plurality of second light-emitting units 13 are arrayed on the substrate 11, and at least one first light-emitting unit 12 and one second light-emitting unit 13 are arranged adjacent to each other. The display panel 20 is disposed on the light-emitting side of the backlight module 10, and the display panel 20 includes a plurality of pixel units 21 arranged in an array. The light-emitting area of ​​each first light-emitting unit 12 or each second light-emitting unit 13 covers at least two pixel units 21. This array-based layout optimizes the spatial efficiency of the optical system, enabling the luminous output of a single light-emitting unit to cover the display requirements of multiple pixel units 21. This significantly reduces the number of light-emitting units while maintaining pixel-level light control precision. Due to the reduced density of light-emitting units, the number of channels required for the driving circuit and the complexity of the power management module decrease exponentially, directly leading to lower hardware costs and offering advantages in reducing energy consumption and improving energy efficiency.

[0103] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0104] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0105] The display device provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display device, characterized in that, include: A backlight module includes a substrate, a plurality of first light-emitting units and a plurality of second light-emitting units. The first light-emitting units have first optical characteristics, and the second light-emitting units have second optical characteristics. The first optical characteristics and the second optical characteristics are different. The plurality of first light-emitting units and the plurality of second light-emitting units are arrayed on the substrate, and at least one first light-emitting unit and one second light-emitting unit are arranged adjacent to each other. The display panel is disposed on the light-emitting side of the backlight module. The display panel includes a plurality of pixel units arranged in an array, and the light-emitting area of ​​each first light-emitting unit or each second light-emitting unit covers at least two of the pixel units.

2. The display device according to claim 1, characterized in that, The first light-emitting units in multiple rows and the second light-emitting units in multiple rows are arranged in a periodic alternation.

3. The display device according to claim 2, characterized in that, When the size of the display panel is greater than or equal to the preset size, the ratio of the number of rows of the first light-emitting unit to the number of rows of the second light-emitting unit is 1:1; when the size of the display panel is less than the preset size, the ratio of the number of rows of the first light-emitting unit to the number of rows of the second light-emitting unit is 2:

1.

4. The display device according to any one of claims 1 to 3, characterized in that, The first optical characteristic includes a first emission angle, the second optical characteristic includes a second emission angle, and the first emission angle is greater than the second emission angle; wherein the range of the first emission angle is greater than or equal to 30°, and the range of the second emission angle is less than 30°.

5. The display device according to claim 4, characterized in that, The first light-emitting unit includes a first light-emitting chip and a first optical component, wherein the first optical component is configured to extend the emitted light angle of the first light-emitting chip to the first light-emitting angle; The second light-emitting unit includes a second light-emitting chip and a second optical component, wherein the second optical component is configured to limit the emitted light angle of the second light-emitting chip to the second light-emitting angle.

6. The display device according to claim 5, characterized in that, The first optical component is a reflective lens. A first receiving cavity is provided at the bottom of the first optical component. The first receiving cavity is configured to receive the first light-emitting chip. A first groove is provided at the top of the first optical component. The inner wall of the first groove forms a reflective surface, and the side wall of the first optical component forms a first refractive surface.

7. The display device according to claim 5, characterized in that, The second optical component is a refractive lens. The bottom of the second optical component is provided with a second receiving cavity, which is configured to receive the second light-emitting chip. The top of the second optical component is provided with a second groove, the inner wall of the second groove forms a second refractive surface, and the side wall of the second optical component forms a third refractive surface.

8. The display device according to any one of claims 1 to 3, characterized in that, It also includes a processor, which is electrically connected to both the backlight module and the display panel, and is configured to provide differential signals to the display panel and control commands to the backlight module.

9. The display device according to claim 8, characterized in that, The backlight module further includes a backlight control chip, which is electrically connected to the processor, the first light-emitting unit, and the second light-emitting unit, respectively. The backlight control chip is configured to convert the control instructions of the processor into execution instructions of the first light-emitting unit and the second light-emitting unit.

10. The display device according to any one of claims 1 to 3, characterized in that, It also includes a power supply, which is electrically connected to the backlight module and the display panel respectively, and the power supply is configured to provide current signals to the first light-emitting unit, the second light-emitting unit and the display panel.

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