Display device and control method of display device

Abstract

Embodiments of the present application disclose a display device and a control method of the display device, and relate to the technical field of display. The display device comprises a backlight module, a display panel, a control module and one or more temperature sensors. The control module determines temperature change data corresponding to a first backlight partition based on a temperature value corresponding to the current image frame and temperature values corresponding to historical image frames. In a case where the temperature change data is greater than or equal to a temperature threshold, a compensation coefficient corresponding to the first backlight partition and the current image frame is 1, so that second backlight data is large, and display brightness of the display device is ensured. In a case where the temperature change data is less than the temperature threshold, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined according to a temperature value corresponding to the first backlight partition and the current image frame and a reference temperature value, so as to reduce color deviation, so as to take into account brightness requirements and color temperature consistency requirements, and improve display effect of the display device.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and a method for controlling the display device. Background Technology

[0002] Display devices can be used to display images or video content. Among them, liquid crystal displays (LCDs) are widely used in daily life due to their low cost. An LCD device may include a display panel, a backlight module, and a control module. The backlight module typically includes red, green, and blue light sources to provide backlighting for the display panel.

[0003] However, during the operation of the display device, color deviation or insufficient peak brightness may occur, resulting in poor display performance. Summary of the Invention

[0004] This application discloses a display device and a control method for the display device. The display device can dynamically determine the compensation coefficient corresponding to the backlight zone based on the temperature change data corresponding to the backlight zone, thereby taking into account both display brightness and color temperature consistency and improving the display effect of the display device.

[0005] This application provides a display device, including: Display panel; The backlight module includes multiple backlight zones, and each of the backlight zones includes at least a red light source, a green light source, and a blue light source. One or more temperature sensors, each temperature sensor corresponding to one or more backlight zones, each temperature sensor corresponding to a different backlight zone, and each temperature sensor being configured to collect temperature data of the corresponding backlight zone. A control module is connected to the backlight module and the one or more temperature sensors respectively, and the control module is configured to: Receive the current image frame and obtain the first backlight data corresponding to each backlight partition based on the current image frame; Based on one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame; the first temperature sensor is any one of the one or more temperature sensors. Based on the temperature value corresponding to the first backlight partition and the current image frame, and the temperature values ​​corresponding to the first backlight partition and one or more historical image frames, the temperature change data corresponding to the first backlight partition is determined. If the temperature change data is greater than or equal to the temperature threshold, then the compensation coefficient between each of the first backlight partitions corresponding to the first temperature sensor and the current image frame is determined to be 1. If the temperature change data is less than the temperature threshold, then the compensation coefficient corresponding to the first backlight partition and the current image frame is determined based on the temperature value corresponding to the first backlight partition and the current image frame and the reference temperature value. The first backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor are adjusted according to the compensation coefficients corresponding to the first backlight partition and the current image frame, so as to obtain the second backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor. The backlight module is controlled to illuminate each light source in the one or more first backlight zones according to the second backlight data corresponding to the one or more first backlight zones.

[0006] In this embodiment, the display device includes one or more temperature sensors, each temperature sensor corresponding to one or more backlight zones. The control module receives the current image frame and obtains first backlight data corresponding to each backlight zone based on the current image frame. Based on the one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, the temperature value of the first backlight zone corresponding to the current image frame is determined. Based on the temperature value corresponding to the current image frame and the temperature value of the first backlight zone corresponding to historical image frames, the temperature change data corresponding to the first backlight zone is determined. If the temperature change data is greater than or equal to a temperature threshold, the first backlight zone can be considered to be in a state of rapid temperature rise. In this case, the compensation coefficient corresponding to the first backlight zone and the current image frame can be set to 1, so as to control the backlight module to light up each light source in the first backlight zone according to the larger second backlight data (consistent with the first backlight data), so as to ensure the display brightness of the display device and meet the brightness requirements of the display device. When the temperature change data is less than the temperature threshold, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined based on the temperature value of the first backlight partition and the reference temperature value. The first backlight data of the first backlight partition is adjusted based on the compensation coefficient to obtain the second backlight data. The light source in the first backlight partition is lit based on the second backlight data to reduce the color shift caused by the temperature attenuation difference of different color light sources, thereby taking into account both brightness requirements and color temperature consistency requirements and improving the display effect of the display device.

[0007] In some embodiments, the temperature change data includes the temperature difference between each two adjacent image frames in the current image frame and the one or more historical image frames, or includes the average of the temperature differences between each two adjacent image frames; The control module is also configured to: If the temperature difference between any two adjacent image frames is greater than or equal to a temperature threshold, then the temperature change data is determined to be greater than or equal to the temperature threshold; or, If the average temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, then the temperature change data is determined to be greater than or equal to the temperature threshold.

[0008] In this embodiment, when the temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, or when the average temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, the first backlight zone has a continuous rapid heating characteristic. This allows the brightness output capability of the first backlight zone to be prioritized during rapid heating, thus ensuring that the display device meets the brightness requirements.

[0009] In some embodiments, determining the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame based on multiple first temperature data collected by the first temperature sensor corresponding to the current image frame includes: Calculate the average value of multiple first temperature data collected by the first temperature sensor corresponding to the current image frame to obtain the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame.

[0010] In this embodiment, the temperature value of the first backlight partition corresponding to the current image frame is determined by averaging multiple first temperature data. This can reduce the impact of single temperature sampling error on the temperature value determination result, so that the obtained temperature value can more accurately reflect the actual temperature of the first backlight partition in the corresponding time period of the current image frame, thereby improving the accuracy of subsequent temperature change data and compensation coefficient determination.

[0011] In some embodiments, obtaining the first backlight data corresponding to each backlight partition based on the current image frame includes: The magnification factor and the initial backlight data corresponding to each backlight zone are obtained based on the current image frame. The initial backlight data corresponding to each backlight zone is adjusted according to the magnification factor to obtain the first backlight data corresponding to each backlight zone.

[0012] In this embodiment, the control module amplifies the initial backlight data corresponding to each backlight zone using a magnification factor to obtain the first backlight data corresponding to each backlight zone. This improves the backlight data of the backlight zones, enabling the light sources in the backlight zones to emit light at higher brightness, thereby increasing the display brightness of the display device and allowing it to meet peak brightness requirements.

[0013] In some embodiments, the compensation coefficient includes the compensation coefficient corresponding to the red light source, the compensation coefficient corresponding to the green light source, and the compensation coefficient corresponding to the blue light source; determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and the reference temperature value, includes: Based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, a compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame is determined, wherein the first color is any one of red, green and blue.

[0014] In this embodiment, based on the first luminous efficiency and the second luminous efficiency corresponding to the first color, the compensation coefficient corresponding to the first backlight partition and the first color light source corresponding to the current image frame is determined. This can make the compensation coefficient match the luminous efficiency attenuation of the first color light source at the current temperature value relative to the reference temperature value, so that the actual luminous brightness ratio of the compensated red light source, green light source and blue light source is close to the target brightness ratio, thereby reducing color deviation and improving the display effect of the display device.

[0015] In some embodiments, before determining the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, the control module is further configured to: Based on the first correspondence between the first color light source and the temperature value corresponding to the first backlight partition and the current image frame, the first luminous efficiency is determined, and the second luminous efficiency corresponding to the reference temperature value is determined. The first correspondence is used to describe the correspondence between the luminous efficiency of the first color light source and the temperature.

[0016] In this embodiment, by pre-setting the first correspondence between each color of light source, the first luminous efficiency and the second luminous efficiency corresponding to each color of light source can be quickly determined, thereby quickly determining the compensation coefficient corresponding to the first backlight partition and the first color light source corresponding to the current image frame, and improving the efficiency of determining the compensation coefficient.

[0017] In some embodiments, determining the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, includes: If the temperature value of the first backlight partition corresponding to the current image frame is less than the reference temperature value, then the compensation coefficient corresponding to the first color light source of the first backlight partition corresponding to the current image frame is determined based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value.

[0018] In this embodiment, when the temperature value of the first backlight partition corresponding to the current image frame is less than the reference temperature value, the compensation coefficient of the first color light source corresponding to the current image frame is determined based on the first luminous efficiency of the first color light source at the current temperature value and the second luminous efficiency at the reference temperature value. This compensation coefficient can match the degree of luminous efficiency attenuation of the first color light source at the current temperature value relative to the reference temperature value, thereby ensuring the accuracy of the obtained second backlight data.

[0019] In some embodiments, determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and a reference temperature value, further includes: If the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value, then the compensation coefficient of the first backlight partition corresponding to the current image frame is determined to be 1.

[0020] In this embodiment, when the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value, the compensation coefficient of the first backlight partition corresponding to the current image frame is determined to be 1. This can keep the second backlight data corresponding to the first backlight partition consistent with the first backlight data, avoiding unnecessary adjustments to the backlight data without temperature offset, thereby ensuring the stability of display brightness and color temperature.

[0021] In some embodiments, determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and a reference temperature value, includes: Based on the temperature values ​​of the second backlight partitions corresponding to the multiple second temperature sensors adjacent to the first temperature sensor and the current image frame, and / or the temperature values ​​of the first backlight partition and one or more historical image frames, the temperature values ​​of the first backlight partition and the current image frame are filtered. Based on the filtered temperature value corresponding to the current image frame corresponding to the first backlight partition, and the reference temperature value, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined.

[0022] In this embodiment, by filtering the temperature value of the first backlight partition and the current image frame based on the temperature values ​​of adjacent backlight partitions and / or the temperature values ​​corresponding to historical image frames, and then determining the compensation coefficient based on the filtered temperature value, the compensation coefficient can reflect the actual temperature state of the first backlight partition and reduce the impact of sudden temperature changes in the spatial dimension and temperature fluctuations in the temporal dimension on the compensation result, thereby improving the regional color consistency and color temperature stability of the display device, and thus improving the display effect of the display device.

[0023] This application provides a control method for a display device, which is applied to a display device. The display device includes a display panel, a backlight module, and one or more temperature sensors. The backlight module includes multiple backlight zones, and each backlight zone includes at least a red light source, a green light source, and a blue light source. Each temperature sensor corresponds to one or more backlight zones, and each temperature sensor corresponds to a different backlight zone. Each temperature sensor is configured to collect the temperature of the corresponding backlight zone. The method includes: Receive the current image frame and obtain the first backlight data corresponding to each backlight partition based on the current image frame; Based on one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame; the first temperature sensor is any one of the one or more temperature sensors. Based on the temperature value corresponding to the first backlight partition and the current image frame, and the temperature values ​​corresponding to the first backlight partition and one or more historical image frames, the temperature change data corresponding to the first backlight partition is determined. If the temperature change data is greater than or equal to the temperature threshold, then the compensation coefficient between each of the first backlight partitions corresponding to the first temperature sensor and the current image frame is determined to be 1. If the temperature change data is less than the temperature threshold, then the compensation coefficient corresponding to the first backlight partition and the current image frame is determined based on the temperature value corresponding to the first backlight partition and the current image frame and the reference temperature value. The first backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor are adjusted according to the compensation coefficients corresponding to the first backlight partition and the current image frame, so as to obtain the second backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor. The backlight module is controlled to illuminate each light source in the one or more first backlight zones according to the second backlight data corresponding to the one or more first backlight zones. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in 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.

[0025] Figure 1 This is a schematic diagram of the structure of a display device disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a control module disclosed in an embodiment of this application; Figure 3A This is a schematic diagram of a temperature sensor and the distribution of backlight zones disclosed in an embodiment of this application; Figure 3B This is a schematic diagram of another temperature sensor and backlight partition distribution disclosed in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a backlight module disclosed in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of another display device disclosed in an embodiment of this application; Figure 6 This is a schematic diagram of the relationship curve between the average backlight brightness level and the magnification factor disclosed in an embodiment of this application; Figure 7 This is a schematic diagram of a first relationship curve corresponding to a red LED disclosed in an embodiment of this application; Figure 8 This is a schematic diagram of the first relationship curves corresponding to a green LED and a blue LED, respectively, as disclosed in an embodiment of this application; Figure 9 This is a schematic diagram of temperature distribution in different areas of a display device disclosed in an embodiment of this application; Figure 10 This is a partial schematic diagram of a temperature matrix disclosed in an embodiment of this application; Figure 11 This is a schematic diagram of the temperature distribution of a display device under different power-on times, as disclosed in an embodiment of this application. Figure 12 This is a schematic diagram of a process for determining first backlight data disclosed in an embodiment of this application; Figure 13 This is a schematic flowchart of a control method for a display device disclosed in an embodiment of this application; Figure 14 This is a flowchart illustrating another control method for a display device disclosed in an embodiment of this application. Detailed Implementation

[0026] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that the terms "comprising" and "having," and any variations thereof, in the embodiments and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0028] It should be noted that, in the following embodiments, when one element is "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediary element.

[0029] The display device provided in this application embodiment can be any product or component with display function, such as a television, mobile phone, tablet computer, monitor, laptop computer, digital photo frame, navigator, wearable device, Internet of Things device, etc.

[0030] Figure 1 This is a schematic diagram of a display device provided in an embodiment of this application. The display device is a liquid crystal display device. Figure 1 As shown, the display device may include a display panel 110, a backlight module 120, and a control module 130. The backlight module 120 is located on the light-incident side of the display panel 110. The backlight module 120 is configured to emit backlight, and the display panel 110 is configured to display images using the backlight emitted by the backlight module 120.

[0031] For example, the display panel 110 may include multiple pixels, each pixel including a liquid crystal layer, electrodes, a color filter, and a polarizer. The liquid crystal layer may be disposed above the backlight module 120, and the electrodes may be disposed on both sides of the liquid crystal layer. The electrodes can generate a driving electric field, which drives the liquid crystal molecules in the liquid crystal layer to deflect (twist), changing the arrangement of the liquid crystal molecules and thus adjusting the transmittance of the pixel. The color filter may be disposed above the liquid crystal layer, and the polarizer may be disposed on both sides of the liquid crystal layer to control the polarization direction of light, making the light transmission characteristics of the liquid crystal layer visible. The backlight module 120 may include one or more light-emitting devices, and the backlight module 120 may be configured to drive the light-emitting devices to illuminate, with the light emitted by the light-emitting devices diffused onto the display panel for image display.

[0032] In some embodiments, please refer to Figure 1 The liquid crystal display device may also include a power supply circuit 140, which is connected to the display panel 110, the backlight module 120, and the control module 130, respectively. The power supply circuit 140 is configured to provide corresponding operating voltages to the display panel 110, the backlight module 120, and the control module 130.

[0033] It should be noted that combining Local Dimming (LD) and Peak Driving (PD) technologies to control the backlight module 120 can improve the display quality of the display device. Local dimming not only reduces the power consumption of the display device but also enables dynamic dimming of the backlight module 120, significantly improving the contrast of the displayed image and enhancing the overall display quality. By employing Peak Driving technology based on Local Dimming, the contrast of the displayed image can be further improved, providing users with a better visual experience.

[0034] The backlight module 120 can be divided into multiple backlight zones, each including at least a red light source, a green light source, and a blue light source. Local dimming technology is used to drive the individual light sources in each backlight zone to illuminate. Understandably, at any given time, all or some of the multiple light sources in a backlight zone can be illuminated.

[0035] The display panel 110 may include multiple pixel units, each corresponding to a multiple backlight partition. Each pixel unit may include one or more pixels. A control module 130 is connected to both the display panel 110 and the backlight module 120. The control module 130 is configured to acquire a current image frame and, based on the current image frame, acquire first backlight data corresponding to each backlight partition. For example, the current image frame includes partition image data corresponding to each of the multiple backlight partitions. The control module 130 can determine the first backlight data corresponding to the first backlight partition based on the partition image data corresponding to the first backlight partition. The partition image data corresponding to the first backlight partition includes first image data corresponding to one or more pixels included in the first pixel unit corresponding to the first backlight partition.

[0036] For example, the current image frame can be linear domain image data, such as the current image frame represented by RGB values. For example, the control module 130 obtains the partition image data corresponding to the first backlight partition from the current image frame, determines the initial backlight data corresponding to the first backlight partition based on the partition image data corresponding to the first backlight partition, and determines the first transmittance corresponding to the first pixel based on the first image data corresponding to the first pixel in the first pixel unit and the initial backlight data corresponding to the first backlight partition. Then, the display panel 110 controls the first pixel to be turned on based on the first transmittance corresponding to the first pixel. Here, the first pixel is any one of one or more pixels included in the first pixel unit.

[0037] Please refer to Figure 2 This illustrates a structural schematic diagram of a control module provided in an embodiment of this application. Figure 2 As shown, the control module may include a perceptual quantizer (PQ) adjustment module 210, a local dimming module 220, a peaking control module 230, an LCD (Liquid Crystal Display) control module 240, and a backlight control module 250.

[0038] First, the current image frame is input to the perceptual quantization adjustment module 210. The perceptual quantization adjustment module 210 adjusts the sharpness, contrast, and color intensity of the current image frame to obtain the adjusted current image frame. The local dimming module 220 receives the adjusted current image frame and divides it according to the backlight partitions to obtain the partition image data corresponding to each backlight partition. Based on the partition image data corresponding to the first backlight partition and conditions such as maximizing contrast, it generates the initial backlight data (BL) corresponding to the first backlight partition. r BL g BL b), and based on the initial backlight data (BL) corresponding to each backlight zone r BL g BL b The adjusted current image frame is corrected to obtain the adjusted partition image data. The adjusted partition image data is sent to the LCD control module 240. The LCD control module 240 controls the display panel 260 to drive the liquid crystal molecules in the liquid crystal layer of each pixel in the pixel unit corresponding to each backlight partition to twist according to the partition image data corresponding to each backlight partition.

[0039] Peak control module 230 receives initial backlight data (BL). r BL g BL b The system performs peaking processing on the initial backlight data based on the APL of the current image frame to obtain the first backlight data, and then sends the first backlight data to the backlight control module 250.

[0040] For example, the control module may include a System On Chip (SOC). The SOC may include a sensing quantization adjustment module 210, a local dimming module 220, and a peak control module 230.

[0041] In some embodiments, the display device may further include one or more temperature sensors, each temperature sensor corresponding to one or more backlight zones, and each temperature sensor corresponding to a different backlight zone, and each temperature sensor being configured to collect temperature data of the corresponding backlight zone.

[0042] It should be noted that the number of backlight zones corresponding to different temperature sensors can be the same or different. For example, such as Figure 3A As shown, the display device may include multiple temperature sensors 310, each corresponding to a multiple backlight zones 320. In other examples, such as Figure 3B As shown, the display device includes M×N temperature sensors, and the backlight module may include 4×M×N backlight zones. In this embodiment, one temperature sensor 310 corresponds to four backlight zones 320. For example, the temperature sensor 310 may be positioned in the middle of the corresponding multiple backlight zones 320 to improve the reliability of the collected temperature data. Here, M and N are positive integers.

[0043] In some embodiments, the backlight control module may be connected to one or more temperature sensors respectively. The backlight control module may determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame based on one or more first temperature data collected by the first temperature sensor corresponding to the current image frame. Based on the temperature value of the first backlight zone corresponding to the current image frame and the temperature values ​​of the first backlight zone corresponding to one or more historical image frames, the backlight control module may determine the temperature change data corresponding to the first backlight zone. If the temperature change data is greater than or equal to a temperature threshold, the compensation coefficient for each first backlight zone corresponding to the first temperature sensor and the current image frame is determined to be 1. If the temperature change data is less than the temperature threshold, the compensation coefficient for the first backlight zone corresponding to the current image frame is determined based on the temperature value of the first backlight zone corresponding to the current image frame and a reference temperature value. The first backlight data corresponding to the one or more first backlight zones corresponding to the first temperature sensor is adjusted according to the compensation coefficient to obtain second backlight data corresponding to each of the one or more first backlight zones. Based on the second backlight data corresponding to each of the one or more first backlight zones, the backlight control module is controlled to illuminate each light source in one or more first backlight zones.

[0044] In this embodiment, the backlight control module is connected to the temperature sensor, and the compensation coefficient is determined by the backlight control module based on the temperature change data and the temperature threshold. Compared with connecting the temperature sensor through the SOC, the wiring distance can be shortened.

[0045] In some embodiments, the backlight control module can generate a backlight control signal based on the second backlight data to control the current of each light source, thereby controlling the backlight module to light up the light source of the backlight module.

[0046] Understandably, the second backlight data may include second sub-backlight data corresponding to the red light source, the green light source, and the blue light source. The second sub-backlight data corresponding to each color of light source can be used to indicate the brightness of the corresponding light source. The backlight control signal may include control data corresponding to the red, green, and blue light sources. The control data corresponding to each color of light source can be used to indicate the duty cycle of the corresponding DC (Direct Current) or PWM (Pulse-Width Modulation) signal.

[0047] Understandably, if the backlight control signal indicates that the brightness of the light source is 0, then the light source can be considered to be off.

[0048] Figure 4 This is a schematic diagram of a backlight module provided in an embodiment of this application. The backlight module may include multiple backlight zones 410, and each backlight zone 410 may include at least three light sources. The three light sources may be a red light source, a green light source, and a blue light source, respectively. The backlight module may also include one or more driver chips 420, which may be connected to one or more light sources. The driver chip 420 is configured to control the brightness of the light sources in the backlight zones according to a backlight control signal.

[0049] It is understood that the number of backlight partitions 410 and driver chips 420 included in the backlight module can be set according to actual needs, and this embodiment does not limit this.

[0050] In some embodiments, the light source may include at least one light-emitting device of a corresponding color, such as a red light source may include at least one red light-emitting device, and the light-emitting devices of the light source are connected in series.

[0051] In other embodiments, the light source includes at least one light-emitting device of a corresponding color, and the light-emitting devices of the light source are connected in parallel.

[0052] In other embodiments, the light source includes multiple light strings connected in parallel, each light string including at least one light-emitting device, and if the light string includes multiple light-emitting devices, the multiple light-emitting devices are connected in series.

[0053] The light-emitting device can be one of the following: Mini LED (Mini Light Emitting Diode), Micro LED (Micro Light Emitting Diode), W LED (White Light-Emitting Diode), RGB LED (Red Green Blue Light-Emitting Diode), GB-rLED (Green Blue-red Light-Emitting Diode), or Q LED (Quantum Dot Light Emitting Diode).

[0054] For example, the display device can be an RGB Mini LED TV. The backlight module of an RGB Mini LED TV can include multiple backlight zones, each of which can include a red light source, a green light source, and a blue light source. The control module can control the emission of the red, green, and blue light sources in different backlight zones separately to achieve zoned light and color control, thereby improving the contrast, color gamut, and color reproduction accuracy of the display device.

[0055] The number of backlight zones can range from hundreds to tens of thousands. Each backlight zone can include multiple groups of light sources, each group of light sources can include one or more LEDs, and each group of light sources can correspond to an independent driving channel. The driving channel can be used to adjust the brightness and / or on / off state of the corresponding light source, and can support a hybrid dimming method that combines pulse width modulation (PWM) and amplitude modulation (AM).

[0056] The manufacturing process for RGB Mini LED TVs is constantly being improved and perfected. Advances in chip manufacturing technology have enabled the continuous reduction in the size of MiniLED chips, significantly improving luminous efficiency and stability, thus allowing RGB Mini LED TVs to be mass-produced and applied.

[0057] In peak brightness testing, the display device needs to achieve the corresponding target peak brightness under different APL (Average Picture Level). For example, Table 1 shows the peak brightness requirements for Mini LED display devices under different APL conditions.

[0058] Table 1 Peak brightness corresponding to different APL conditions

[0059] Among them, steady-state peak brightness refers to the peak brightness that the display device needs to achieve after working continuously for a period of time (such as more than 5 minutes) under the target APL screen, while instantaneous peak brightness refers to the peak brightness that the display device needs to achieve within a short period of time, such as 10 seconds, under the target APL screen.

[0060] The testing procedure is as follows: Input the test image corresponding to the target APL into the display device, measure the display brightness of the display device with a luminance meter to obtain the measured peak brightness, compare the measured peak brightness with the target peak brightness corresponding to the target APL, and if the measured peak brightness cannot reach the target peak brightness, it is determined that the display device does not meet the peak brightness test requirements.

[0061] Display devices generate heat during use. The luminous efficiency of red, green, and blue light sources decreases with increasing temperature, and the degree of attenuation varies among these sources. This leads to color deviation and distortion issues during display use, especially in Mini LED displays, which have poor heat dissipation, causing a significant temperature rise and a bluish tint to the displayed colors. By reducing the backlight data corresponding to the light sources with the lowest attenuation rates, the attenuation rates of red, green, and blue light sources can be made more similar with temperature changes, thus reducing color shift.

[0062] However, practical experience has shown that since the above methods essentially sacrifice display brightness to suppress color shift, the display device may fail to meet the peak brightness test requirements. For example, in test scenarios with a small APL (Average Power Probability) and a high instantaneous peak brightness, if the backlight data of some color light sources is reduced, the actual peak brightness of the display device may be lower than the required instantaneous peak brightness, causing the display device to fail the peak brightness test.

[0063] The researchers discovered that when the APL (Average Power Probability) of the image frame input to the display device is low, the amplification factor determined by the peak control module is large, resulting in relatively large backlight data for the red, green, and blue light sources. Based on this, the temperature changes corresponding to the backlight zones can be used to determine whether the display device is in a test scenario with low APL and instantaneous peak brightness. This allows for dynamic selection between ensuring the display device's brightness and ensuring accurate color temperature, thus balancing peak brightness requirements and color temperature consistency requirements.

[0064] This application provides a display device and a control method for the display device. The display device includes one or more temperature sensors, each temperature sensor corresponding to one or more backlight zones. It receives a current image frame and acquires first backlight data corresponding to each backlight zone based on the current image frame. Based on the one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, it determines the temperature value of the first backlight zone corresponding to the current image frame. Based on the temperature value corresponding to the current image frame and the temperature value of the first backlight zone corresponding to historical image frames, it determines the temperature change data corresponding to the first backlight zone. When the temperature change data is greater than or equal to a temperature threshold, the first backlight zone can be considered to be in a state of rapid temperature rise. In this case, the compensation coefficient corresponding to the first backlight zone and the current image frame can be set to 1, so that the compensated second backlight data is larger (without reducing the first backlight data). The backlight module is controlled to light up each light source in the first backlight zone according to the larger second backlight data, so as to ensure the display brightness of the display device and meet the brightness requirements of the display device. When the temperature change data is less than the temperature threshold, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined based on the temperature value of the first backlight partition and the reference temperature value. The first backlight data of the first backlight partition is adjusted based on the compensation coefficient to obtain the second backlight data. The light source in the first backlight partition is lit based on the second backlight data to reduce the color shift caused by the temperature attenuation difference of different color light sources. This balances the brightness requirements and color temperature consistency requirements, thereby improving the display effect of the display device.

[0065] Figure 5 A schematic diagram of another display device provided in an embodiment of this application is shown. Figure 5 As shown, the display device may include a display panel 510, a backlight module 520, a control module 530, and one or more temperature sensors 540. The backlight module 520 may include multiple backlight zones, each backlight zone including at least a red light source, a green light source, and a blue light source. Each temperature sensor 540 corresponds to one or more backlight zones, and each temperature sensor 540 corresponds to a different backlight zone. Each temperature sensor 540 is configured to collect temperature data of the corresponding backlight zone.

[0066] The control module 530 is connected to the backlight module 520 and one or more temperature sensors 540. The control module 530 can be configured to receive the current image frame, acquire the first backlight data corresponding to each backlight zone based on the current image frame, determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame based on the one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, and determine the temperature change data corresponding to the first backlight zone based on the temperature value of the first backlight zone corresponding to the current image frame and the temperature value of the first backlight zone corresponding to one or more historical image frames. It then determines whether the temperature change data is greater than or equal to a temperature threshold. If the temperature change data is greater than or equal to the temperature threshold, the compensation coefficient of each first backlight zone corresponding to the first temperature sensor and the current image frame is set to 1. If the temperature change data is less than the temperature threshold, the compensation coefficient of the first backlight zone corresponding to the current image frame is determined based on the temperature value of the first backlight zone and the current image frame and a reference temperature value. The first backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor are adjusted according to the compensation coefficients corresponding to the first backlight partitions and the current image frame, so as to obtain the second backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor.

[0067] The first temperature sensor is any one of one or more temperature sensors 540 included in the display device. It is understood that the temperature data collected by the temperature sensor 540 reflects the temperature of the backlight zone corresponding to that temperature sensor 540. The control module 530 is connected to each temperature sensor 540 to acquire the temperature data collected by each temperature sensor 540.

[0068] For example, the current image frame may include partition image data corresponding to the multiple backlight partitions included in the backlight module 520. The first backlight data corresponding to the first backlight partition can be determined based on the partition image data corresponding to the first backlight partition. The first backlight data may include first sub-backlight data corresponding to the red light source, first sub-backlight data corresponding to the green light source, and first sub-backlight data corresponding to the blue light source.

[0069] It should be noted that a historical image frame refers to an image frame acquired by the control module 530 before the current image frame is acquired. The control module 530 acquires different image frames at different times. For example, the temperature value corresponding to the first backlight partition and the current image frame can be used to characterize the temperature of the first backlight partition at a first moment, which can be the moment when the control module 530 acquires the current image frame. The temperature value corresponding to the first backlight partition and a historical image frame can be used to characterize the temperature of the first backlight partition at a second moment, which can be the moment when the control module 530 acquires the historical image frame.

[0070] In some embodiments, a subset of historical image frames received from the control module 530 can be selected as historical image frames, such as selecting a historical image frames adjacent to the current image frame, thereby ensuring the reliability of the determined temperature change data. It is understood that the selected subset of historical image frames can be continuous or discontinuous. For example, the image frame preceding the current image frame and the image frame preceding the previous image frame received by the control module 530 can be selected as historical image frames. Another example is selecting the image frame preceding the current image frame and the image frame preceding the previous image frame as historical image frames; that is, in this example, the image frame preceding the previous image frame is not selected as a historical image frame.

[0071] It should be noted that, for the case of a historical image frame, the previous image frame of the current image frame can be selected as the historical image frame. The temperature difference between the temperature value corresponding to the first backlight partition and the previous image frame and the temperature value corresponding to the first backlight partition and the current image frame is used as the temperature change data. This temperature change data can be the temperature value corresponding to the first backlight partition and the current image frame minus the temperature value corresponding to the first backlight partition and the previous image frame.

[0072] For example, the temperature sensor 540 can collect temperature data of the corresponding backlight zone according to a preset sampling period and send the collected temperature data to the control module 530. The first temperature data may refer to the temperature data collected by the first temperature sensor between the previous image frame and the current image frame, such as the temperature data collected between the time when the control module 530 obtains the previous image frame and the first moment (including the first moment).

[0073] Temperature change data corresponding to the first backlight zone can be used to characterize the amount or rate of temperature change of the first backlight zone. A larger temperature change indicates a more significant temperature change in the first backlight zone. A temperature threshold can be pre-stored in memory and set according to actual needs. For example, the APL range where the display device does not meet the peak brightness test requirements under a color temperature compensation strategy can be determined experimentally. Specifically, a compensation coefficient corresponding to the first backlight zone and the current image frame can be determined based on the temperature value of the first backlight zone and the current image frame, as well as a reference temperature value. The first backlight data is then compensated based on this compensation coefficient to obtain the second backlight data. Then, the first backlight zone is controlled to emit light based on the second backlight data, and the measured peak brightness of the display device under different APL conditions is tested, thereby determining the APL range where the measured peak brightness is lower than the target peak brightness due to temperature compensation. Further, temperature change data at the initial stage of the instantaneous peak brightness test corresponding to this APL range can be obtained, and a temperature threshold can be set based on this temperature change data.

[0074] If the temperature change data corresponding to the first backlight zone is greater than or equal to the temperature threshold, the first backlight zone can be considered to be in a state of rapid temperature rise. This rapid temperature rise state usually corresponds to a period of relatively small instantaneous peak brightness output of APL, so the display brightness of the display device can be prioritized.

[0075] If the temperature change data corresponding to the first backlight zone is less than the temperature threshold, the first backlight zone can be considered to be in a relatively flat temperature change state, that is, it is not in the stage of small instantaneous peak brightness output of APL. At this time, the color temperature accuracy of the display device can be guaranteed first.

[0076] It should be noted that, considering system stability and actual product application scenarios, the duration of the instantaneous peak phase is relatively short, typically a few seconds. During this phase, the display device can prioritize brightness and not reduce the first backlight data, thus enabling the display device to meet the instantaneous peak brightness requirement. Due to its short duration, this control method usually does not cause damage to the light-emitting devices. For the steady-state peak phase, due to its longer duration, the temperature change of the backlight zones tends to be gradual, and color temperature deviations are more easily perceived by users. Therefore, a color temperature-priority control strategy can be adopted to reduce color temperature shift or color deviation during long-term display.

[0077] For example, based on the temperature value corresponding to the first backlight partition and the current image frame, and a reference temperature value, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined to be less than or equal to 1. A compensation coefficient of less than or equal to 1 for the first backlight partition ensures that the second backlight data corresponding to the same backlight partition is less than or equal to the first backlight data. This reduces the backlight data corresponding to colors with lower attenuation, making the actual luminous brightness ratio of red, green, and blue light sources closer to the target luminous brightness ratio. This reduces color temperature shift or color deviation caused by differences in temperature attenuation between different color light sources, ensuring color temperature consistency of the display device.

[0078] For example, the control module can be configured to calculate the product between the compensation coefficient corresponding to the first backlight partition and the current image frame and the first backlight data corresponding to the first backlight partition, to obtain the second backlight data corresponding to the first backlight partition.

[0079] It should be noted that, for the case of multiple backlight zones corresponding to one temperature sensor 540, the multiple backlight zones corresponding to the same temperature sensor 540 share a common compensation coefficient. The control module 530 can be configured to adjust the first backlight data corresponding to the target first backlight zone according to the compensation coefficient corresponding to the first backlight zone and the current image frame, to obtain the second backlight data corresponding to the target first backlight zone, and control the backlight module 520 to illuminate each light source in the target first backlight zone according to the second backlight data corresponding to the target first backlight zone. Here, the target first backlight zone is any one of one or more first backlight zones corresponding to the first temperature sensor.

[0080] In some embodiments, the temperature change data includes the temperature difference between any two adjacent image frames in the current image frame and one or more historical image frames. The control module is also configured to determine that the temperature change data is greater than or equal to a temperature threshold if the temperature difference between any two adjacent image frames is greater than or equal to a temperature threshold.

[0081] It should be noted that two adjacent image frames can be two adjacent image frames arranged in chronological order. For example, in the current image frame and multiple historical image frames, the current image frame and multiple historical image frames can be sorted according to the acquisition time of the image frames acquired by the control module, and the temperature difference between the temperature values ​​corresponding to each pair of adjacent image frames after sorting can be determined. The temperature difference can be used to characterize the increase in temperature value of the later image frame relative to the temperature value of the previous image frame.

[0082] In some embodiments, if there is a temperature difference less than a temperature threshold between any two adjacent image frames, the temperature change data is determined to be less than the temperature threshold. It should be noted that when the APL corresponding to the current image frame is small and the display device is in the instantaneous peak brightness output phase, the backlight partition corresponding to the bright pixel will continuously operate with a large backlight data for a short period, causing the temperature of the backlight partition to rise rapidly. If there is a temperature difference less than the temperature threshold between any two adjacent image frames, it indicates that the backlight partition has not maintained a rapid temperature rise state between consecutive image frames. In this case, the temperature rise of the backlight partition may be caused by changes in ambient temperature or detection noise, and not necessarily by the small APL instantaneous peak brightness output phase. Therefore, this situation is determined as the temperature change data being less than the temperature threshold to avoid misjudgment.

[0083] In some embodiments, for cases including multiple historical image frames, multiple temperature difference values ​​can be calculated, and the temperature change data includes the average of the temperature difference values ​​between any two adjacent image frames. The control module is also configured to determine that the temperature change data is greater than or equal to a temperature threshold if the average of the temperature difference values ​​between any two adjacent image frames is greater than or equal to a temperature threshold.

[0084] It should be noted that determining temperature change data by averaging multiple temperature differences can reduce the impact of single temperature sampling errors or instantaneous noise on the judgment result, thereby improving the stability of temperature change judgment. For example, when the temperature value of the first backlight zone corresponding to a certain image frame fluctuates due to sampling errors, using the average of multiple temperature differences for judgment can reduce the impact of this abnormal temperature value on the calculation method for determining the compensation coefficient.

[0085] In some embodiments, if the average temperature difference between any two adjacent image frames is less than a temperature threshold, then the temperature change data is determined to be less than the temperature threshold. In this case, it can be assumed that the first backlight zone as a whole has not yet shown a rapid temperature rise trend, or has entered a stage of relatively gradual temperature change from the instantaneous peak brightness output stage, thus prioritizing the color temperature accuracy of the display device.

[0086] In this embodiment, when the temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, or when the average temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, the first backlight zone has a continuous rapid heating characteristic. This allows the brightness output capability of the first backlight zone to be prioritized during rapid heating, thus ensuring that the display device meets the brightness requirements.

[0087] In some embodiments, determining the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame based on multiple first temperature data collected by the first temperature sensor corresponding to the current image frame may include: calculating the average value of multiple first temperature data collected by the first temperature sensor corresponding to the current image frame to obtain the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame.

[0088] It should be noted that when the first temperature sensor collects multiple first temperature data corresponding to the current image frame, it can acquire some or all of the multiple first temperature data and calculate the average value of the portion of the first temperature data, or calculate the average value of all the first temperature data, and use the calculated average value as the temperature value of the first backlight partition corresponding to the current image frame.

[0089] In this embodiment, the temperature value of the first backlight partition corresponding to the current image frame is determined by averaging multiple first temperature data. This can reduce the impact of single temperature sampling error on the temperature value determination result, so that the obtained temperature value can more accurately reflect the actual temperature of the first backlight partition in the corresponding time period of the current image frame, thereby improving the accuracy of subsequent temperature change data and compensation coefficient determination.

[0090] Understandably, if the first temperature sensor only collects temperature data corresponding to the current image frame, the temperature value of the first backlight zone corresponding to the current image frame can be determined directly based on that temperature data.

[0091] In some embodiments, the display device may include M×N temperature sensors. If the temperature change data corresponding to the backlight partitions of the M×N temperature sensors are all greater than or equal to the temperature threshold, then the compensation matrix corresponding to the current image frame is an identity matrix. The compensation matrix includes compensation coefficients corresponding to multiple backlight partitions, where M and N are positive integers.

[0092] It should be noted that the compensation matrix may include M×N elements, with each element corresponding to a temperature sensor. That is, each matrix element includes the compensation coefficient for the backlight zone corresponding to the temperature sensor. This compensation coefficient can be used to adjust the first backlight data of one or more backlight zones corresponding to the temperature sensor. For example, if the temperature sensor corresponds to one backlight zone, an element of the compensation matrix can be used to adjust the first backlight data of that backlight zone. If the temperature sensor corresponds to multiple backlight zones, an element of the compensation matrix can be used to adjust the first backlight data of all multiple backlight zones.

[0093] If the temperature change data of only some of the backlight zones corresponding to the M×N temperature sensors is greater than or equal to the temperature threshold, the compensation coefficient corresponding to those temperature sensors can be set to 1. Then, based on the temperature values ​​of the backlight zones corresponding to the remaining temperature sensors, the current image frame, and the reference temperature value, the compensation coefficients corresponding to the remaining backlight zones can be determined. This allows for priority in ensuring brightness output capability for backlight zones in the instantaneous peak brightness output stage, and priority in ensuring color temperature accuracy for backlight zones not in the instantaneous peak brightness output stage, thus achieving more refined zone compensation control.

[0094] In some embodiments, obtaining the first backlight data corresponding to each backlight partition based on the current image frame may include: obtaining the magnification factor and the initial backlight data corresponding to each backlight partition based on the current image frame, adjusting the initial backlight data corresponding to each backlight partition based on the magnification factor, and obtaining the first backlight data corresponding to each backlight partition.

[0095] The initial backlight data can be the backlight data obtained after local dimming processing based on the current image frame. The magnification factor can be used to enhance the peak brightness of the initial backlight data. The first backlight data can be understood as the backlight data obtained after peak control processing of the initial backlight data.

[0096] For example, the control module can determine a magnification factor based on the current image frame, or determine multiple magnification factors corresponding one-to-one with multiple backlight zones. If a magnification factor is determined, it can be used to adjust the initial backlight data corresponding to each of the multiple backlight zones. That is, multiple backlight zones can share the same magnification factor.

[0097] For example, the control module is also configured to calculate the product between the magnification factor corresponding to the current image frame and the initial backlight data corresponding to each backlight partition, to obtain the first backlight data corresponding to each backlight partition.

[0098] For example, if the control module determines the magnification factor corresponding to each backlight partition based on the current image frame, it can adjust the initial backlight data corresponding to the target first backlight partition according to the magnification factor corresponding to the target first backlight partition to obtain the first backlight data corresponding to the target first backlight partition.

[0099] For example, the control module is also configured to calculate the product between the magnification factor corresponding to the target first backlight partition and the initial backlight data corresponding to the target first backlight partition, to obtain the first backlight data corresponding to the target first backlight partition.

[0100] In some embodiments, obtaining the first backlight data corresponding to each backlight partition based on the current image frame may include: obtaining the initial backlight data corresponding to each backlight partition based on the current image frame; determining the BL APL (Back Light Average Picture Level) corresponding to the current image frame based on the initial backlight data corresponding to each backlight partition; determining the magnification factor based on the BL APL corresponding to the current image frame; and performing magnification processing on the initial backlight data corresponding to each backlight partition based on the magnification factor to obtain the first backlight data corresponding to each backlight partition.

[0101] The average backlight brightness level can be used to characterize the average backlight output level of the backlight module corresponding to the current image frame. In some embodiments, determining the BLAPL corresponding to the current image frame based on the initial backlight data corresponding to each backlight zone may include: determining the magnification factor based on the BLAPL corresponding to the current image frame and a second correspondence. The second correspondence can be used to describe the correspondence between BLAPL and the magnification factor.

[0102] For example, the second correspondence can be represented by a relationship curve. Figure 6 This diagram illustrates a curve showing the relationship between the average backlight brightness level and the magnification factor, as provided in an embodiment of this application. Figure 6 As shown, when the average backlight brightness level is low, it indicates that the overall backlight load corresponding to the current image frame is low. The display device can provide a larger brightness enhancement space for bright areas, thus allowing for a larger amplification factor. Conversely, when the average backlight brightness level is high, it indicates that the overall backlight load corresponding to the current image frame is high. To avoid excessive power consumption, excessive temperature rise, or excessive drive current, a smaller amplification factor can be determined. In other words, the amplification factor can decrease as the average backlight brightness level increases, meaning that the amplification factor is negatively correlated with the average backlight brightness level.

[0103] For example, obtaining the magnification factor based on the current image frame may include obtaining the magnification factor based on the average image brightness of the current image frame. It is understood that the magnification factor can be obtained based on the current image frame, or the partitioned image data can be determined first based on the current image frame, and then the magnification factor can be determined based on the partitioned image data.

[0104] In this embodiment, the control module amplifies the initial backlight data corresponding to each backlight zone using a magnification factor to obtain the first backlight data corresponding to each backlight zone. This improves the backlight data of the backlight zones, enabling the light sources in the backlight zones to emit light at higher brightness, thereby increasing the display brightness of the display device and allowing it to meet peak brightness requirements.

[0105] In some embodiments, the compensation coefficients include compensation coefficients corresponding to red light sources, green light sources, and blue light sources. Determining the compensation coefficients for the first backlight partition and the current image frame based on the temperature value of the first backlight partition and the current image frame, and a reference temperature value, may include: determining the compensation coefficients for the first color light source corresponding to the first color light source in the first backlight partition and the current image frame based on a first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and a second luminous efficiency at the reference temperature value.

[0106] The first color can be any one of red, green, and blue. It should be noted that the luminous efficiency of different colored light sources varies at different temperatures. The first luminous efficiency refers to the luminous efficiency of the first colored light source when the temperature of the first backlight zone is the temperature value corresponding to the current image frame. The second luminous efficiency refers to the luminous efficiency of the first colored light source when the temperature of the first backlight zone is a reference temperature value. Luminous efficiency can be used to characterize the light emission capability of a light source under unit driving data, unit driving current, or unit input power. For example, luminous efficiency can be the ratio between the luminous flux of the light source and the input power, i.e., the luminous flux of the light source divided by the input power.

[0107] It should be noted that the luminous efficiency of different colored light sources decreases at different rates with temperature. For example, the luminous efficiency of a red light source typically decreases more rapidly with temperature than that of a green or blue light source. By determining a compensation coefficient based on the first and second luminous efficiencies corresponding to the first color light source, the degree of luminous efficiency decay of the first color light source relative to a reference temperature value at the current temperature can be determined. Based on this, differentiated compensation can be applied to the first sub-backlight data of different colored light sources to obtain the second sub-backlight data corresponding to each color light source.

[0108] For example, the second sub-backlight data corresponding to the first color light source is the product of the first sub-backlight data corresponding to the first color light source and the compensation coefficient corresponding to the first backlight partition and the first color light source corresponding to the current image frame.

[0109] In this embodiment, based on the first luminous efficiency and the second luminous efficiency corresponding to the first color, the compensation coefficient corresponding to the first backlight partition and the first color light source corresponding to the current image frame is determined. This can make the compensation coefficient match the luminous efficiency attenuation of the first color light source at the current temperature value relative to the reference temperature value, so that the actual luminous brightness ratio of the compensated red light source, green light source and blue light source is close to the target brightness ratio, thereby reducing color deviation and improving the display effect of the display device.

[0110] In some embodiments, before determining the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, the control module may also be configured to: determine the first luminous efficiency corresponding to the temperature value corresponding to the first backlight partition and the current image frame based on the first correspondence of the first color light source, and determine the second luminous efficiency corresponding to the reference temperature value.

[0111] It should be noted that the display device may pre-store the first correspondence relationship corresponding to the red light source, the first correspondence relationship corresponding to the green light source, and the first correspondence relationship corresponding to the blue light source.

[0112] The first correspondence describes the relationship between the luminous efficiency of the light source of the first color and the temperature. For example, the first correspondence can be represented by a relationship curve, a lookup table, or a function expression.

[0113] Figure 7 A schematic diagram of the first relationship curve corresponding to the red LED is shown. Figure 8 The first relationship curves for green LEDs and blue LEDs are shown. For example... Figures 7 to 8 As shown, the luminous efficiency of red LEDs decays more rapidly with temperature changes than that of green and blue LEDs. It should be noted that the degree of decay can be expressed by the decay rate, which is calculated by dividing the first difference by the luminous efficiency corresponding to the temperature before the change. Here, the first difference is the difference between the luminous efficiency corresponding to the temperature before the change and the luminous efficiency corresponding to the temperature after the change. Taking a temperature increase from 50℃ to 70℃ as an example, the decay rate of red LEDs is approximately 14.3%, that of blue LEDs is approximately 2%, and that of green LEDs is approximately 4.6%. It is evident that when the temperature deviates from the reference temperature, the actual luminous brightness ratio among the red, green, and blue light sources tends to deviate from the target luminous brightness ratio under the reference condition.

[0114] In this embodiment, by pre-setting the first correspondence between each color of light source, the first luminous efficiency and the second luminous efficiency corresponding to each color of light source can be quickly determined, thereby quickly determining the compensation coefficient corresponding to the first backlight partition and the first color light source corresponding to the current image frame, and improving the efficiency of determining the compensation coefficient.

[0115] In some embodiments, determining a compensation coefficient for the first backlight partition and the current image frame based on a first luminous efficiency of the first color light source at a temperature value corresponding to the first backlight partition and the current image frame, and a second luminous efficiency at a reference temperature value, may include: if the temperature value corresponding to the first backlight partition and the current image frame is less than the reference temperature value, then determining a compensation coefficient for the first color light source corresponding to the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value.

[0116] It should be noted that when the temperature value corresponding to the current image frame in the first backlight zone is lower than the reference temperature value, the first backlight zone is in a state below the temperature reference point. Since the luminous efficiency of the red light source decreases significantly with temperature, the actual luminous brightness of the red light source at this temperature is likely to change significantly relative to the luminous brightness at the reference temperature value, causing the displayed color of the first backlight zone to deviate from the displayed color corresponding to the reference temperature value. Therefore, when the current temperature value is lower than the reference temperature value, a compensation coefficient for the red light source can be determined based on the second luminous efficiency of the red light source at the reference temperature value and the first luminous efficiency at the current temperature value. This compensation coefficient is less than 1, in order to reduce the first sub-backlight data corresponding to the red light source.

[0117] Furthermore, based on the luminous efficiency attenuation of the red light source, while keeping the white balance ratio between the red, green, and blue light sources constant, compensation coefficients can be determined for the green and blue light sources respectively, so that the compensated display color approaches the display color corresponding to the reference temperature value, thereby reducing the color shift of this backlight zone.

[0118] For example, determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, may include: determining a first attenuation coefficient based on the first luminous efficiency and the reference luminous efficiency corresponding to the first color light source; determining a second attenuation coefficient based on the second luminous efficiency and the reference luminous efficiency corresponding to the first color light source; and determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the first attenuation coefficient and the second attenuation coefficient.

[0119] It should be noted that the reference luminous efficiency corresponding to the first color light source can refer to the luminous efficiency of the first color light source at the target temperature. The target temperature can be selected according to actual needs, such as 20°C. This embodiment does not make a specific limitation on this.

[0120] For example, determining the first attenuation coefficient based on the first luminous efficiency and the reference luminous efficiency corresponding to the first color light source may include: calculating the ratio between the first luminous efficiency and the reference luminous efficiency corresponding to the first color light source to obtain the first attenuation coefficient corresponding to the first color light source. For example, the first attenuation coefficient corresponding to the first color light source is the first luminous efficiency divided by the reference luminous efficiency corresponding to the first color light source.

[0121] For example, determining the second attenuation coefficient based on the second luminous efficiency and the reference luminous efficiency corresponding to the first color light source may include: calculating the ratio between the second luminous efficiency and the reference luminous efficiency corresponding to the first color light source to obtain the second attenuation coefficient corresponding to the first color light source. For example, the second attenuation coefficient is the second luminous efficiency divided by the reference luminous efficiency corresponding to the first color light source.

[0122] For example, if the temperature value of the first backlight zone corresponding to the current image frame is less than the reference temperature value, then the compensation coefficient corresponding to the red light source is... The calculation formula can be found in formula (1), and the compensation coefficient corresponding to the green light source is... The calculation formula can be found in formula (2), and the compensation coefficient corresponding to the blue light source is... The calculation formula can be found in formula (3).

[0123] (1); in, The first attenuation coefficient corresponds to the red light source. This is the second attenuation coefficient corresponding to the red light source.

[0124] (2); in, This is the first attenuation coefficient corresponding to the green light source. This is the second attenuation coefficient corresponding to the green light source.

[0125] (3); in, This is the first attenuation coefficient corresponding to the blue light source. This is the second attenuation coefficient corresponding to the blue light source.

[0126] In this embodiment, when the temperature value of the first backlight partition corresponding to the current image frame is less than the reference temperature value, the compensation coefficient of the first color light source corresponding to the first backlight partition and the current image frame is determined based on the first luminous efficiency of the first color light source at the current temperature value and the second luminous efficiency at the reference temperature value. This compensation coefficient can match the luminous efficiency attenuation of the first color light source at the current temperature value relative to the reference temperature value, thus ensuring the accuracy of the obtained second backlight data.

[0127] In some embodiments, if the temperature value of the first backlight partition corresponding to the current image frame is greater than the reference temperature value, then the compensation coefficient corresponding to the red light source of the first backlight partition corresponding to the current image frame is determined to be 1. Based on the first attenuation coefficient corresponding to the red light source and the first attenuation coefficient corresponding to the green light source, the compensation coefficient corresponding to the green light source of the first backlight partition corresponding to the current image frame is determined. Based on the first attenuation coefficient corresponding to the red light source and the first attenuation coefficient corresponding to the blue light source, the compensation coefficient corresponding to the blue light source of the first backlight partition corresponding to the current image frame is determined.

[0128] For example, if the temperature value of the first backlight zone corresponding to the current image frame is greater than the reference temperature value, then the compensation coefficient corresponding to the red light source is... The calculation formula can be found in formula (4), and the compensation coefficient corresponding to the green light source is... The calculation formula can be found in formula (5), and the compensation coefficient corresponding to the blue light source is... The calculation formula can be found in formula (6).

[0129] (4); (5); in, The first attenuation coefficient corresponds to the red light source. This is the first attenuation coefficient corresponding to the green light source.

[0130] (6); in, The first attenuation coefficient corresponds to the red light source. This is the first attenuation coefficient corresponding to the blue light source.

[0131] It should be noted that for backlight zones with lower temperatures, the color temperature compensation strategy is to reduce the brightness of the red light source to improve the reddish tint compared to the thermal steady state. For backlight zones with higher temperatures, the strategy is to reduce the brightness of the green and blue light sources. Although the luminous efficiency of the red light source decreases more at higher temperatures, increasing the brightness of the red light source—that is, increasing the drive current for backlight zones with significantly reduced red light source brightness—would accelerate the entry of the red LED into the saturation region, leading to a further temperature increase and a vicious cycle. Therefore, for backlight zones with higher temperatures, reducing the brightness of the green and blue light sources can balance color uniformity.

[0132] In some embodiments, if the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value, then the compensation coefficient of the first backlight partition corresponding to the current image frame is determined to be 1.

[0133] It should be noted that when the temperature value of the first backlight zone corresponding to the current image frame is equal to the reference temperature value, the first backlight zone is in the reference temperature state. At this time, the luminous efficiency of each color light source is the same as or basically the same as the luminous efficiency at the reference temperature value, so there is no need to compensate for the backlight data corresponding to each color light source based on temperature differences.

[0134] In this embodiment, when the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value, the compensation coefficient of the first backlight partition corresponding to the current image frame is determined to be 1. This can keep the second backlight data corresponding to the first backlight partition consistent with the first backlight data, avoiding unnecessary adjustments to the backlight data without temperature offset, thereby ensuring the stability of display brightness and color temperature.

[0135] In some embodiments, the reference temperature value may be a preset temperature value, or it may be the average, median, or weighted average of the temperature values ​​of multiple backlight zones corresponding to the current image frame.

[0136] For example, the temperature of the stable white balance adjustment point can be used as a preset temperature value, so that the compensation process is based on the white balance adjustment result in a stable state, and the compensated display color is close to the display color corresponding to the stable white balance adjustment point, thereby improving the color temperature consistency of the display device under different temperature conditions.

[0137] In some embodiments, determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame and the reference temperature value may include: filtering the temperature value corresponding to the first backlight partition and the current image frame based on the temperature values ​​corresponding to the second backlight partition and the current image frame respectively of the plurality of second temperature sensors adjacent to the first temperature sensor, and / or the temperature values ​​corresponding to the first backlight partition and one or more historical image frames respectively; and determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the filtered temperature value corresponding to the first backlight partition and the current image frame, and the reference temperature value.

[0138] It should be noted that the second backlight zone is the backlight zone corresponding to the second temperature sensor, which is the temperature sensor adjacent to the first temperature sensor. In the temperature matrix corresponding to the current image frame, the temperature values ​​of the first backlight zone and the second backlight zone corresponding to the current image frame are arranged in adjacent order. Figure 3A For example, the temperature sensor adjacent to the temperature sensor located in the first row and first column may include the temperature sensor located in the second column of the first row, the temperature sensor located in the first column of the second row, and the temperature sensor located in the second column of the second row.

[0139] It should be noted that during the operation of a display device, the internal temperature distribution is usually uneven. For example, due to factors such as the physical arrangement of circuit boards on the back panel and the heat dissipation channels, the temperature around the edges of the display device may be lower, while the temperature of the corresponding area on the power board or motherboard may be higher. These regional temperature differences will cause the luminous efficiency attenuation of the red, green, and blue light sources in different backlight zones of the same screen to be different, resulting in significant color differences between different backlight zones and affecting the display effect of the display device.

[0140] For example, Figure 9 A schematic diagram showing the temperature distribution in different areas of a display device is provided. Figure 9 As shown, there may be significant temperature differences between different backlight zones. For example, areas near the power board, motherboard, or high-power devices may be warmer, while areas near the screen edges or with better heat dissipation may be cooler.

[0141] In this embodiment, the temperature values ​​of the first backlight partition and the current image frame are filtered based on the temperature values ​​of the second backlight partition and the current image frame corresponding to the multiple second temperature sensors adjacent to the first temperature sensor. That is, the filtered temperature value of the first backlight partition and the current image frame is determined by combining the temperature conditions of the first backlight partition and its surrounding backlight partitions. This makes the compensation intensity between adjacent backlight partitions smoother, avoids color jumps, reduces color differences between different partitions of the same display device, and improves the spatial color temperature consistency of the display screen.

[0142] For example, the elements of the temperature matrix corresponding to the current image frame are traversed sequentially, and filtering is performed based on the surrounding area. For instance, as... Figure 10 As shown, taking a 3×3 surrounding area as an example, the formula for calculating the filtered temperature value T'(i,j) corresponding to the (i,j)th temperature value T(i,j) in the temperature matrix can be found in Equation (7), where i and j are both positive integers.

[0143] (7); Where x is the filtering parameter, which can be preset. Different backlight zones can correspond to different x values. For example, the x value of the (i, j)th element (temperature value) in the temperature matrix is... x= for other elements .

[0144] For matrix elements located at the edge of the temperature matrix, the average can be calculated based on the actual adjacent matrix elements, or the corresponding 3×3 region can be constructed by boundary filling, mirror filling, or copying boundary values. This embodiment does not make specific limitations on this.

[0145] In this embodiment, by performing spatial smoothing filtering on the temperature matrix corresponding to the current image frame, the filtered temperature value of each backlight partition can simultaneously reference its own temperature and the temperature of the surrounding backlight partitions. This reduces the impact of abnormal sampling of a single temperature sensor or sudden changes in local temperature on the compensation coefficient, making the compensation intensity between adjacent backlight partitions smoother and reducing the possibility of color jumps in the region.

[0146] During continuous display, the temperature of the same backlight zone in a display device will change over time. For example, Figure 11 This diagram illustrates the temperature distribution of the display device under different power-on times. According to... Figure 11 It can be seen that the temperature of the first backlight zone may gradually increase over time. Based on this, by combining the temperature values ​​corresponding to the first backlight zone and one or more historical image frames, the temperature value corresponding to the first backlight zone and the current image frame is filtered. This reduces the probability of abrupt changes in the compensation coefficient of the same backlight zone between adjacent image frames, preventing color jumps or flickers in the image over time. This avoids color jumps in the displayed image at any given moment, improving the temporal color temperature consistency of the displayed image.

[0147] It's understandable. Although the brightness will decrease as the power-on time increases, color temperature compensation is performed after half an hour of power-on. Under these circumstances, the brightness loss is negligible.

[0148] In this embodiment, by filtering the temperature value of the first backlight partition and the current image frame based on the temperature values ​​of adjacent backlight partitions and / or the temperature values ​​corresponding to historical image frames, and then determining the compensation coefficient based on the filtered temperature value, the compensation coefficient can reflect the actual temperature state of the first backlight partition and reduce the impact of sudden temperature changes in the spatial dimension and temperature fluctuations in the temporal dimension on the compensation result, thereby improving the regional color consistency and color temperature stability of the display device, and thus improving the display effect of the display device.

[0149] Please refer to Figure 12 This illustrates a schematic diagram of a process for determining first backlight data provided in an embodiment of this application. Figure 12 As shown, the process may include steps 1202 to 1208.

[0150] Step 1202: The SOC acquires the initial backlight data corresponding to each backlight zone.

[0151] Step 1204: The SOC determines the average backlight brightness level based on the initial backlight data corresponding to each backlight zone.

[0152] Step 1206: The SOC determines the magnification factor corresponding to the average backlight brightness level according to the preset second correspondence.

[0153] The second correspondence is used to describe the relationship between the average backlight brightness level and the magnification factor.

[0154] Step 1208: The SOC adjusts the initial backlight data corresponding to each backlight zone according to the magnification factor to obtain the first backlight data corresponding to each backlight zone, and then sends the first backlight data to the backlight control module.

[0155] Please refer to Figure 13 This illustrates a flowchart of a control method for a display device provided in an embodiment of this application. Figure 13 As shown, the control method may include steps 1302 to 1312.

[0156] Step 1302: The backlight control module acquires the first temperature data collected by the first temperature sensor, and determines the temperature value corresponding to the first backlight partition and the current image frame based on the first temperature data.

[0157] Step 1304: Determine whether the temperature change data is greater than or equal to the temperature threshold. If not, proceed to step 1306; if yes, proceed to step 1310.

[0158] Step 1306: Determine whether the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value. If not, proceed to step 1308; if yes, proceed to step 1310.

[0159] Step 1308: Determine the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, as well as the reference temperature value.

[0160] Step 1310: Determine that the compensation coefficient corresponding to the first backlight partition and the current image frame is 1.

[0161] Step 1312: Adjust the first backlight data corresponding to the first backlight zone according to the compensation coefficient to obtain the second backlight data corresponding to the first backlight zone.

[0162] The luminous efficiency of the red, green, and blue light sources in the backlight module varies with temperature, and the degree of attenuation differs among the different colors. The red light source is typically more significantly affected by temperature. Due to the board layout and airflow design of the display device, temperature differences exist in different areas, leading to inconsistent color temperatures or color shifts in different regions.

[0163] If the brightness of some color light sources is reduced to ensure color temperature consistency, the display brightness of the display device will decrease, which may affect the achievement of brightness indicators such as instantaneous peak brightness and steady-state peak brightness. This embodiment obtains the temperature value of each backlight zone and determines whether the backlight zone is currently in the instantaneous peak stage or the stable stage based on the temperature change data. If the backlight zone is in the instantaneous peak stage, brightness is prioritized, and the RGB light sources emit light according to the larger backlight data to ensure that the peak brightness is achieved. If the backlight zone is in the stable stage, color temperature is prioritized. Using the decay rate of a certain color as a benchmark, the proportion of other colors is adjusted to make the decay rate of the three colors consistent with the benchmark decay rate, achieving the same color temperature as the benchmark, thereby achieving a balance between brightness and color temperature, and simultaneously meeting the hard brightness indicators and color temperature consistency requirements.

[0164] Figure 14 A flowchart illustrating another control method for a display device provided in an embodiment of this application is shown. This control method for a display device can be applied to any of the display devices provided in the above embodiments. The display device may include a backlight module, a display panel, and one or more temperature sensors.

[0165] like Figure 14 As shown, the control method for the display device may include steps 1402 to 1406.

[0166] Step 1402: Receive the current image frame and obtain the first backlight data corresponding to each backlight partition based on the current image frame.

[0167] Step 1404: Based on one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, determine the temperature value of one or more first backlight partitions corresponding to the first temperature sensor and the current image frame.

[0168] The first temperature sensor can be any one of one or more temperature sensors.

[0169] Step 1406: Determine the temperature change data corresponding to the first backlight partition based on the temperature value corresponding to the first backlight partition and the current image frame, as well as the temperature values ​​corresponding to the first backlight partition and one or more historical image frames.

[0170] Step 1408: Determine whether the temperature change data is greater than or equal to the temperature threshold. If yes, proceed to step 1410; otherwise, proceed to step 1412.

[0171] Step 1410: Determine that the compensation coefficients of each first backlight partition corresponding to the first temperature sensor and the current image frame are 1.

[0172] Step 1412: Determine the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, as well as the reference temperature value.

[0173] Step 1414: Adjust the first backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor according to the compensation coefficients corresponding to the first backlight partitions and the current image frame, so as to obtain the second backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor.

[0174] Step 1416: Control the backlight module to light up each light source in one or more first backlight zones according to the second backlight data corresponding to one or more first backlight zones.

[0175] In some embodiments, the temperature change data includes the temperature difference between any two adjacent image frames in the current image frame and one or more historical image frames, or the average temperature difference between any two adjacent image frames. The control method further includes: If the temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, then the temperature change data is determined to be greater than or equal to the temperature threshold; or, If the average temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, then the temperature change data is determined to be greater than or equal to the temperature threshold.

[0176] In some embodiments, determining the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame based on multiple first temperature data collected by the first temperature sensor corresponding to the current image frame may include: Calculate the average value of multiple first temperature data collected by the first temperature sensor corresponding to the current image frame, and obtain the temperature value of one or more first backlight partitions corresponding to the first temperature sensor and the current image frame.

[0177] In some embodiments, obtaining the first backlight data corresponding to each backlight partition based on the current image frame may include: The magnification factor and the initial backlight data corresponding to each backlight zone are obtained based on the current image frame. The initial backlight data corresponding to each backlight zone is adjusted according to the magnification to obtain the first backlight data corresponding to each backlight zone.

[0178] In some embodiments, the compensation coefficients include the compensation coefficients corresponding to the red light source, the green light source, and the blue light source. Based on the temperature value corresponding to the first backlight partition and the current image frame, and the reference temperature value, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined, including: Based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame is determined.

[0179] The first color is any one of red, green, and blue.

[0180] In some embodiments, before determining the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at a temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at a reference temperature value, the control method may further include: Based on the first correspondence between the first color light source and the first luminous efficiency, the first luminous efficiency corresponding to the temperature value of the first backlight partition and the current image frame is determined, and the second luminous efficiency corresponding to the reference temperature value is determined.

[0181] The first correspondence between the first color light source and the first color light source is used to establish the correspondence between the luminous efficiency of the first color light source and the temperature.

[0182] In some embodiments, determining a compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on a first luminous efficiency of the first color light source at a temperature value corresponding to the first backlight partition and the current image frame, and a second luminous efficiency at a reference temperature value, includes: If the temperature value of the first backlight partition corresponding to the current image frame is less than the reference temperature value, then the compensation coefficient corresponding to the first color light source of the first backlight partition corresponding to the current image frame is determined based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value.

[0183] In some embodiments, determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and a reference temperature value, may further include: If the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value, then the compensation coefficient of the first backlight partition corresponding to the current image frame is determined to be 1.

[0184] In some embodiments, determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and a reference temperature value, includes: Based on the temperature values ​​of the second backlight partitions corresponding to the current image frame and the temperature values ​​of the first backlight partitions corresponding to one or more historical image frames, which are adjacent to the first temperature sensor, the temperature values ​​of the first backlight partitions corresponding to the current image frame are filtered. Based on the filtered temperature value corresponding to the current image frame of the first backlight partition and the reference temperature value, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined.

[0185] This application also provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed by the controller, the controller enables the controller to implement any of the control methods for display devices disclosed in this application.

[0186] This application discloses a computer program product, including a computer program that, when executed by the controller, causes the controller to implement any of the display device control methods disclosed in this application.

[0187] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0188] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0189] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they can be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0190] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0191] If the integrated units described above are implemented as software functional units and sold or used as independent products, they can be stored in a computer-accessible memory. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several requests to cause a computer device (which can be a personal computer, server, or network device, specifically a processor in the computer device) to execute some or all of the steps of the methods described in the various embodiments of this application.

[0192] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-Erasable Programmable Read-Only Memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0193] The foregoing has provided a detailed description of a display device and a control method for the display device disclosed in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of 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: Display panel; The backlight module includes multiple backlight zones, and each of the backlight zones includes at least a red light source, a green light source, and a blue light source. One or more temperature sensors, each temperature sensor corresponding to one or more backlight zones, each temperature sensor corresponding to a different backlight zone, and each temperature sensor being configured to collect temperature data of the corresponding backlight zone. A control module is connected to the backlight module and the one or more temperature sensors respectively, and the control module is configured to: Receive the current image frame and obtain the first backlight data corresponding to each backlight partition based on the current image frame; Based on one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame. The first temperature sensor is any one of the one or more temperature sensors; Based on the temperature value corresponding to the first backlight partition and the current image frame, and the temperature values ​​corresponding to the first backlight partition and one or more historical image frames, the temperature change data corresponding to the first backlight partition is determined. If the temperature change data is greater than or equal to the temperature threshold, then the compensation coefficient between each of the first backlight partitions corresponding to the first temperature sensor and the current image frame is determined to be 1. If the temperature change data is less than the temperature threshold, then the compensation coefficient corresponding to the first backlight partition and the current image frame is determined based on the temperature value corresponding to the first backlight partition and the current image frame and the reference temperature value. The first backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor are adjusted according to the compensation coefficients corresponding to the first backlight partition and the current image frame, so as to obtain the second backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor. The backlight module is controlled to illuminate each light source in the one or more first backlight zones according to the second backlight data corresponding to the one or more first backlight zones.

2. The display device according to claim 1, characterized in that, The temperature change data includes the temperature difference between each two adjacent image frames in the current image frame and the one or more historical image frames, or the average temperature difference between each two adjacent image frames. The control module is also configured to: If the temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, then the temperature change data is determined to be greater than or equal to the temperature threshold. or, If the average temperature difference between any two adjacent image frames is greater than or equal to the temperature threshold, then the temperature change data is determined to be greater than or equal to the temperature threshold.

3. The display device according to claim 1, characterized in that, Based on multiple first temperature data collected by the first temperature sensor corresponding to the current image frame, determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame, including: Calculate the average value of multiple first temperature data collected by the first temperature sensor corresponding to the current image frame to obtain the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame.

4. The display device according to claim 1, characterized in that, The step of obtaining the first backlight data corresponding to each backlight partition based on the current image frame includes: The magnification factor and the initial backlight data corresponding to each backlight zone are obtained based on the current image frame. The initial backlight data corresponding to each backlight zone is adjusted according to the magnification factor to obtain the first backlight data corresponding to each backlight zone.

5. The display device according to claim 1, characterized in that, The compensation coefficients include the compensation coefficients corresponding to the red light source, the green light source, and the blue light source; determining the compensation coefficients corresponding to the first backlight partition and the current image frame based on the temperature value of the first backlight partition and the current image frame, and the reference temperature value, includes: Based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, a compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame is determined, wherein the first color is any one of red, green and blue.

6. The display device according to claim 5, characterized in that, Before determining the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, the control module is further configured to: Based on the first correspondence between the first color light source and the temperature value corresponding to the first backlight partition and the current image frame, the first luminous efficiency is determined, and the second luminous efficiency corresponding to the reference temperature value is determined. The first correspondence is used to describe the correspondence between the luminous efficiency of the first color light source and the temperature.

7. The display device according to claim 5, characterized in that, The step of determining the compensation coefficient corresponding to the first color light source of the first backlight partition and the current image frame based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value, includes: If the temperature value of the first backlight partition corresponding to the current image frame is less than the reference temperature value, then the compensation coefficient corresponding to the first color light source of the first backlight partition corresponding to the current image frame is determined based on the first luminous efficiency of the first color light source at the temperature value corresponding to the first backlight partition and the current image frame, and the second luminous efficiency at the reference temperature value.

8. The display device according to claim 7, characterized in that, The step of determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and the reference temperature value, further includes: If the temperature value of the first backlight partition corresponding to the current image frame is equal to the reference temperature value, then the compensation coefficient of the first backlight partition corresponding to the current image frame is determined to be 1.

9. The display device according to claim 1, characterized in that, The step of determining the compensation coefficient corresponding to the first backlight partition and the current image frame based on the temperature value corresponding to the first backlight partition and the current image frame, and the reference temperature value, includes: Based on the temperature values ​​of the second backlight partitions corresponding to the multiple second temperature sensors adjacent to the first temperature sensor and the current image frame, and / or the temperature values ​​of the first backlight partition and one or more historical image frames, the temperature values ​​of the first backlight partition and the current image frame are filtered. Based on the filtered temperature value corresponding to the current image frame corresponding to the first backlight partition, and the reference temperature value, the compensation coefficient corresponding to the first backlight partition and the current image frame is determined.

10. A control method for a display device, characterized in that, The invention is applied to a display device, which includes a display panel, a backlight module, and one or more temperature sensors. The backlight module includes multiple backlight zones, each of which includes at least a red light source, a green light source, and a blue light source. Each of the temperature sensors corresponds to one or more backlight zones, and each temperature sensor corresponds to a different backlight zone. Each of the temperature sensors is configured to collect the temperature of the corresponding backlight zone. The method includes: Receive the current image frame and obtain the first backlight data corresponding to each backlight partition based on the current image frame; Based on one or more first temperature data collected by the first temperature sensor corresponding to the current image frame, determine the temperature value of one or more first backlight zones corresponding to the first temperature sensor and the current image frame; the first temperature sensor is any one of the one or more temperature sensors. Based on the temperature value corresponding to the first backlight partition and the current image frame, and the temperature values ​​corresponding to the first backlight partition and one or more historical image frames, the temperature change data corresponding to the first backlight partition is determined. If the temperature change data is greater than or equal to the temperature threshold, then the compensation coefficient between each of the first backlight partitions corresponding to the first temperature sensor and the current image frame is determined to be 1. If the temperature change data is less than the temperature threshold, then the compensation coefficient corresponding to the first backlight partition and the current image frame is determined based on the temperature value corresponding to the first backlight partition and the current image frame and the reference temperature value. The first backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor are adjusted according to the compensation coefficients corresponding to the first backlight partition and the current image frame, so as to obtain the second backlight data corresponding to one or more first backlight partitions corresponding to the first temperature sensor. The backlight module is controlled to illuminate each light source in the one or more first backlight zones according to the second backlight data corresponding to the one or more first backlight zones.

Images