Backlight control method, display chip and backlight module

Abstract

The invention discloses a backlight control method, a display chip and a backlight module, and the method comprises the steps: determining a current temperature state of a target light-emitting unit connected with a target output channel according to dimming data corresponding to the target output channel in a plurality of first image frames displayed in a first time period, the target output channel is any one of a plurality of output channels of the light modulator; and determining target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, and controlling the backlight brightness of the target light-emitting unit according to the target dimming data. Because the determination of the current temperature state depends on a plurality of dimming data in a period of time, the damage of high temperature to the light-emitting unit can be reduced and the service life of the light-emitting unit can be effectively prolonged by using the dimming data to carry out temperature compensation.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a backlight control method, a display chip, and a backlight module. Background Art

[0002] In recent years, with the rapid development of image display technologies, to bring a better visual experience to users, display devices have gradually developed towards being larger and having higher performance. However, in large-sized display devices, as the number of backlight sources, dimmers (English: Dimmer), and dimmer controllers (English: Dimmer Controller) increases, the device density on the backlight board becomes relatively high, the heat dissipation effect of various devices becomes poor, and due to the increasing requirements of users for the high dynamic range (English: High Dynamic Range, abbreviated as HDR) of display devices, the data processing volume and current of display devices will both increase. This will cause the temperature of the display device to rise rapidly and become relatively high. Such a high-temperature state will damage the backlight source, resulting in a relatively low actual light-emitting brightness of the backlight source and a shortened service life.

[0003] To mitigate the impact of the high-temperature state on display devices, temperature sensors for monitoring the temperature of the backlight source are usually provided in display devices in the prior art, and the backlight source is controlled to stop emitting light at a specific temperature. However, this method in the prior art essentially cannot avoid the high-temperature damage to the backlight source, and thus cannot extend the service life of the backlight source; and since multiple additional temperature sensors are required, this will complicate the structure of the backlight unit. Correspondingly, the manufacturing process of the backlight board will also become complicated, thereby increasing the manufacturing cost of the display device. Summary of the Invention

[0004] The present invention provides a backlight control method, a display chip, and a backlight module, which can solve the problems that in existing display devices, the continuous high-temperature state damages the light-emitting unit, resulting in a reduced light-emitting efficiency and a shortened service life of the light-emitting unit, without the need to add temperature sensors.

[0005] In a first aspect, an embodiment of the present invention provides a backlight control method, including:

[0006] Determining a current temperature state of a target light-emitting unit according to dimming data corresponding to a target output channel in a plurality of first image frames;

[0007] Determining target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, and controlling the backlight brightness of the target light-emitting unit according to the target dimming data;

[0008] Wherein, the multiple first image frames are multiple image frames that have been displayed within a first time period, the target output channel is any one of the multiple output channels of the dimmer, and the target light-emitting unit is a light-emitting unit correspondingly connected to the target output channel.

[0009] In the backlight control method provided by the embodiments of the present invention, the current temperature state of the target light-emitting unit can be predicted by using multiple dimming data corresponding to the target output channel within a period of time, and the dimming data transmitted to the target light-emitting unit can be temperature-compensated by using the predicted current temperature state. Since no additional temperature sensor is required, the development cost of the device can be effectively reduced. In addition, since the determination of the current temperature state depends on multiple dimming data of the target output channel within a period of time, that is, the influence caused by continuous temperature rise on the target light-emitting unit can be considered. Therefore, temperature compensation is performed according to the current temperature state, and the backlight is controlled by using the compensated dimming data, which can reduce the damage caused by high temperature to the light-emitting unit and effectively extend the service life of the light-emitting unit. Furthermore, through the multiple dimming data corresponding to each output channel, the light-emitting units correspondingly connected to each output channel are compensated specifically. This specific temperature compensation method has a more excellent compensation effect and can effectively improve the performance of the display device.

[0010] In an alternative embodiment, the determining the current temperature state of the target light-emitting unit according to the dimming data corresponding to the target output channel in the multiple first image frames includes:

[0011] Determine the first dimming cumulative data according to the dimming data corresponding to the target output channel in the multiple first image frames;

[0012] Based on the first dimming cumulative data, determine the current temperature state of the target light-emitting unit.

[0013] In an alternative embodiment, the determining the current temperature state of the target light-emitting unit based on the first dimming cumulative data includes:

[0014] Based on the first correspondence relationship and the first dimming cumulative data, determine the current temperature value of the target light-emitting unit, where the first correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the temperature value;

[0015] Compare a preset temperature threshold with the current temperature value. If the current temperature value is greater than or equal to the preset temperature threshold, determine that the current temperature state is a high temperature state;

[0016] If the current temperature value is less than the preset temperature threshold, determine that the current temperature state is a normal temperature state.

[0017] The above method uses the first correspondence relationship and the first dimming cumulative data to predict the current temperature state of the target light-emitting unit. Without additionally adding a temperature sensor, it can determine the current temperature state of the target light-emitting unit and perform a temperature compensation operation based on the current temperature state to mitigate the impact of the high-temperature state on the light-emitting unit and extend the lifespan of the light-emitting unit. Moreover, since there is no need to add an additional temperature sensor, compared with the prior art method of performing high-temperature compensation by setting a temperature sensor, it can neither change the backlight panel structure, simplify the production process, nor reduce the cost of the display device.

[0018] In an alternative embodiment, determining the current temperature state of the target light-emitting unit based on the first dimming cumulative data includes:

[0019] Based on the first correspondence relationship and the first dimming cumulative data, determine the current temperature state of the target light-emitting unit;

[0020] Among them, the first correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the temperature state, and the temperature state includes at least a normal temperature state and a high-temperature state.

[0021] The above method uses the first correspondence relationship and the first dimming cumulative data to predict the current temperature state of the target light-emitting unit. Without additionally adding a temperature sensor, it can determine the current temperature state of the target light-emitting unit and perform a temperature compensation operation based on the current temperature state to mitigate the impact of the high-temperature state on the light-emitting unit and extend the lifespan of the light-emitting unit. Moreover, since there is no need to add an additional temperature sensor, compared with the prior art method of performing high-temperature compensation by setting a temperature sensor, it can neither change the backlight panel structure, simplify the production process, nor reduce the cost of the display device.

[0022] In an alternative embodiment, one image frame corresponds to multiple dimming data, and one dimming data is used to control a light-emitting unit connected to one output channel of the dimmer;

[0023] Determining the first dimming cumulative data according to the dimming data corresponding to the target output channel in multiple first image frames includes:

[0024] Perform an accumulation process on the dimming data corresponding to the target output channel in the multiple first image frames to obtain the first dimming cumulative data;

[0025] Among them, the start time of the first time period is not earlier than the power-on time of the display device, and the end time of the first time period is not later than the power-off time of the display device.

[0026] In an alternative embodiment, the dimming data includes current data and PWM data, and the first dimming cumulative data includes first current cumulative data and / or first PWM cumulative data;

[0027] The step of accumulating the dimming data corresponding to the target output channel in the plurality of first image frames to obtain the dimming cumulative data includes:

[0028] Accumulating the current data in the dimming data corresponding to the target output channel to obtain the first current cumulative data,

[0029] and / or, accumulating the PWM data in the dimming data corresponding to the target output channel to obtain the first PWM cumulative data.

[0030] In the above method, since the dimming data includes current data and PWM data, when accumulating the dimming data corresponding to the target output channel, the current data can be accumulated, the PWM data can be accumulated, or both the current data and the PWM data can be accumulated simultaneously. Its calculation method is flexible to generate the first dimming cumulative data for temperature state prediction. Since the cumulative data is used for temperature prediction in the embodiments of the present invention, it can take into account the influence of continuous temperature rise on the light-emitting unit. Therefore, high-temperature compensation based on the currently predicted temperature state using the cumulative data can achieve precise compensation with good compensation effect and can effectively extend the service life of the light-emitting unit.

[0031] In an alternative embodiment, the step of determining the target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame includes:

[0032] When it is determined that the current temperature state is a normal temperature state, the dimming data corresponding to the target output channel in the current image frame is used as the target dimming data;

[0033] When it is determined that the current temperature state is a high-temperature state, based on the high-temperature state, the first dimming compensation data corresponding to the target unit is determined, and according to the first dimming compensation data, the dimming data corresponding to the target output channel in the current image frame is adjusted to obtain the target dimming data.

[0034] In an alternative embodiment, the step of determining the first dimming compensation data corresponding to the target unit based on the high-temperature state includes:

[0035] Comparing a preset duration threshold with the duration of the high-temperature state;

[0036] When it is determined that the duration of maintaining the high-temperature state is greater than the preset duration threshold, determine the first dimming compensation data according to the second corresponding relationship and the current temperature value of the target light-emitting unit;

[0037] Wherein, the second corresponding relationship is used to characterize the corresponding relationship between the temperature value and the dimming compensation data, and the current temperature value is determined according to the first dimming cumulative data.

[0038] In the above method, when it is determined that the duration of maintaining the current temperature state is greater than the preset duration threshold, the first dimming compensation data corresponding to the target light-emitting unit is extracted by using the second corresponding relationship, so as to perform high-temperature compensation processing on the target light-emitting unit, reduce the damage of high temperature to the light-emitting unit, and extend the service life of the light-emitting unit.

[0039] In an optional embodiment, after comparing the preset duration threshold with the duration of maintaining the high-temperature state, it further includes:

[0040] When it is determined that the duration of maintaining the high-temperature state is less than or equal to the preset duration threshold, the dimming data corresponding to the target output channel in the current image frame is used as the target dimming data.

[0041] In the above method, when it is determined that the duration of maintaining the high-temperature state is less than or equal to the preset duration threshold, it indicates that the damage caused by the temperature to the light-emitting unit is relatively small at this time. Then, the dimming data corresponding to the target output channel in the current image frame can be directly used as the target dimming data, that is, the dimming data corresponding to the target output channel in the current image frame is kept unchanged, so as to ensure an ideal backlight brightness for image display.

[0042] In an optional embodiment, the adjusting the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain the target dimming data includes:

[0043] Using the first dimming compensation data, reducing the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data;

[0044] Wherein, the first dimming compensation data is generated when the duration of maintaining the high-temperature state is greater than the preset duration threshold.

[0045] In the above method, the first dimming compensation data is used to reduce the dimming data corresponding to the target output channel in the current image frame, so that the target light-emitting unit turns on the backlight according to the reduced dimming data. The reduction of the dimming data will cause a decrease in the operating current or the lighting frequency of the target light-emitting unit, thereby reducing the heat generated by the target light-emitting unit, and correspondingly reducing the temperature of the target light-emitting unit, so as to achieve the purpose of reducing the temperature of the light-emitting unit, avoiding damage to the light-emitting unit caused by a continuous high-temperature state, and extending the service life of the light-emitting unit.

[0046] In an alternative embodiment, the method further includes:

[0047] Determine the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple second image frames, where the multiple second image frames are multiple image frames displayed within a second time period;

[0048] Based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame, determine the target dimming data.

[0049] In the above method, the dimming data corresponding to the target output channel in multiple second image frames is also used to predict the current aging state of the target light-emitting unit, and according to the current aging state and the current temperature state, a compensation operation is performed on the dimming data corresponding to the target output channel in the current image frame, so that when the target light-emitting unit controls its own brightness according to the compensated target dimming data, it can not only reduce the phenomenon of the actual luminous brightness reduction caused by the aging of the light-emitting unit, but also control the actual luminous brightness of the light-emitting unit to be close to the theoretical luminous brightness while ensuring that the light-emitting unit itself is not damaged, ensuring the display effect of the image and improving the performance of the display device.

[0050] In an alternative embodiment, the determining the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple second image frames includes:

[0051] Determine second dimming cumulative data according to the dimming data corresponding to the target output channel in the multiple second image frames, where the starting moment of the second time period is the moment of the first power-on of the display device;

[0052] Based on the second dimming cumulative data, determine the current aging state of the target light-emitting unit.

[0053] For the above method, by using the second dimming cumulative data determined from the dimming data corresponding to the target output channel in multiple second image frames to predict the current aging state of the target light-emitting unit, the current aging state of the light-emitting unit can be accurately predicted, and aging compensation can be performed accordingly to mitigate the phenomenon of reduced actual light-emitting brightness caused by the aging of the light-emitting unit. While ensuring that the light-emitting unit itself is not damaged, the actual light-emitting brightness of the light-emitting unit is controlled to be close to the theoretical light-emitting brightness, improving the performance of the display device.

[0054] In an alternative embodiment, determining the current aging state of the target light-emitting unit based on the second dimming cumulative data includes:

[0055] Determining the current aging state based on a third correspondence relationship and the second dimming cumulative data, where the third correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the aging state of the light-emitting unit.

[0056] In an alternative embodiment, determining the target dimming data based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame includes:

[0057] Determining first dimming compensation data corresponding to the target unit based on the current temperature state, and determining second dimming compensation data corresponding to the target unit based on the current aging state;

[0058] Adjusting the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data and the second dimming compensation data to obtain the target dimming data.

[0059] In an alternative embodiment, determining the second dimming compensation data corresponding to the target unit based on the current aging state includes:

[0060] Determining the second dimming compensation data according to a fourth correspondence relationship and the current aging state, where the fourth correspondence relationship is used to represent the correspondence relationship between the aging state of the light-emitting unit and the dimming compensation data.

[0061] For the above method, the current aging state of the target light-emitting unit can be predicted by using the third correspondence relationship, and the second dimming compensation data corresponding to the current aging state can be determined according to the predicted current aging state and the fourth correspondence relationship, so as to use the second dimming compensation data to compensate the dimming data, making the light-emitting brightness reduced due to the aging of the light-emitting unit itself return to normal, ensuring the HDR requirements of the display device, and improving the display effect of the display device.

[0062] In an alternative embodiment, the multiple output channels of the dimmer are color output channels, and the first dimming cumulative data is the first dimming cumulative data of the target color, where the target color is the emission color of the target light-emitting unit correspondingly connected to the target output channel;

[0063] Determining the current temperature state of the target light-emitting unit based on the first dimming cumulative data includes:

[0064] Determining a first target correspondence among multiple fifth correspondences according to the target color, and determining the current temperature state of the target light-emitting unit based on the first target correspondence and the first dimming cumulative data of the target color;

[0065] Wherein, the multiple fifth correspondences are respectively used to represent the correspondence between the dimming cumulative data of different colors and the temperature state, and the temperature state at least includes a high-temperature state and a normal temperature state;

[0066] Determining the first dimming compensation data corresponding to the target unit based on the current temperature state includes:

[0067] Comparing the duration of maintaining the high-temperature state with a preset duration threshold;

[0068] When it is determined that the duration of maintaining the high-temperature state is greater than the preset duration threshold, determining a second target correspondence among multiple sixth correspondences according to the target color, and determining the first dimming compensation data according to the second target correspondence and the current temperature value of the target light-emitting unit;

[0069] Wherein, the multiple sixth correspondences are respectively used to represent the correspondence between the temperature values of light-emitting units of different colors and the dimming compensation data, and the current temperature value is determined according to the first dimming cumulative data of the target color.

[0070] In the above method, in the color backlight unit architecture, the colors of the light-emitting units connected to different output channels of the dimmer are different, that is, the output channels of the dimmer are color output channels. At this time, for the light-emitting units of a certain color (i.e., the target color), the first target correspondence corresponding to this color and the first cumulative data of this color are used to predict the current temperature state of the target light-emitting unit; and the second target correspondence corresponding to this color is used to determine the first dimming compensation data of the target light-emitting unit, and the high-temperature compensation operation is performed on the dimming data corresponding to the target light-emitting unit by using the first dimming compensation data. Since there are different fifth correspondences and different sixth correspondences for different colors of the light-emitting units, and the current temperature state and the first dimming compensation data of the light-emitting units of the corresponding colors are predicted accordingly, it is possible to perform targeted compensation for the light-emitting units of different colors, avoiding the occurrence of the white balance collapse problem caused by different brightness reduction amounts of the light-emitting units of different colors as the temperature rises, ensuring the image display effect of the display device, and improving the performance of the display device.

[0071] In an optional embodiment, the multiple output channels of the dimmer are color output channels, the second dimming cumulative data is the second dimming cumulative data of the target color, and the target color is the light-emitting color of the target light-emitting unit connected to the target output channel;

[0072] Determining the current aging state of the target light-emitting unit based on the second dimming cumulative data includes:

[0073] According to the target color, determine the third target correspondence in multiple seventh correspondences, and determine the current aging state based on the third target correspondence and the second dimming cumulative data of the target color;

[0074] Wherein, the multiple seventh correspondences are respectively used to represent the correspondence between the dimming cumulative data of different colors and the aging states of the light-emitting units of the corresponding colors;

[0075] Determining the second dimming compensation data corresponding to the target light-emitting unit based on the current aging state includes:

[0076] According to the target color, determine the fourth target correspondence in multiple eighth correspondences, and determine the second dimming compensation data according to the fourth target correspondence and the current aging state;

[0077] Wherein, the multiple eighth correspondences are respectively used to represent the correspondence between the aging states of the light-emitting units of different colors and the dimming compensation data.

[0078] In the above method, in the color backlight unit architecture, the third target correspondence corresponding to the target color and the first cumulative data of the target color are used to predict the current aging state of the target light-emitting unit, and the fourth target correspondence corresponding to the target color and the current aging state are used to determine the second dimming compensation data corresponding to the target light-emitting unit, so as to use the second dimming compensation data to compensate the dimming data corresponding to the target light-emitting unit in the current image frame, so that the reduced luminous brightness of the light-emitting units of different colors due to their own aging is restored to normal, ensuring the HDR requirements of the display device and improving the display effect of the display device.

[0079] In a second aspect, an embodiment of the present invention provides a display chip, including:

[0080] A state prediction module, configured to determine the current temperature state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple first image frames;

[0081] A compensation processing module, configured to determine target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, and control the backlight brightness of the target light-emitting unit according to the target dimming data;

[0082] Wherein, the multiple first image frames are multiple image frames that have been displayed within a first time period, the target output channel is any one of the multiple output channels of the dimmer, and the target light-emitting unit is a light-emitting unit correspondingly connected to the target output channel.

[0083] In an optional embodiment, the state prediction module is specifically configured to:

[0084] Determine first dimming cumulative data according to the dimming data corresponding to the target output channel in the multiple first image frames;

[0085] Determine the current temperature state of the target light-emitting unit based on the first dimming cumulative data.

[0086] In an optional embodiment, the state prediction module is specifically configured to:

[0087] Determine the current temperature value of the target light-emitting unit based on the first correspondence and the first dimming cumulative data, where the first correspondence is used to represent the correspondence between the dimming cumulative data and the temperature value;

[0088] Compare a preset temperature threshold with the current temperature value. If the current temperature value is greater than or equal to the preset temperature threshold, determine that the current temperature state is a high-temperature state;

[0089] If the current temperature value is less than the preset temperature threshold, determine that the current temperature state is a normal temperature state.

[0090] In an alternative embodiment, the state prediction module is specifically configured to:

[0091] Based on the first correspondence and the first dimming cumulative data, determine the current temperature state of the target light-emitting unit;

[0092] Wherein, the first correspondence is used to represent the correspondence between the dimming cumulative data and the temperature state, and the temperature state at least includes a normal temperature state and a high temperature state.

[0093] In an alternative embodiment, one image frame corresponds to multiple dimming data, and one dimming data is used to control a light-emitting unit connected to one output channel of the dimmer;

[0094] The state prediction module is specifically configured to:

[0095] Accumulate the dimming data corresponding to the target output channel in the multiple first image frames to obtain the first dimming cumulative data;

[0096] Wherein, the start time of the first time period is not earlier than the power-on time of the display device, and the end time of the first time period is not later than the power-off time of the display device.

[0097] In an alternative embodiment, the dimming data includes current data and PWM data, and the first dimming cumulative data includes first current cumulative data and / or first PWM cumulative data;

[0098] The state prediction module is specifically configured to:

[0099] Accumulate the current data in the dimming data corresponding to the target output channel to obtain the first current cumulative data,

[0100] and / or, accumulate the PWM data in the dimming data corresponding to the target output channel to obtain the first PWM cumulative data.

[0101] In an alternative embodiment, the compensation processing module is specifically configured to:

[0102] When it is determined that the current temperature state is a normal temperature state, use the dimming data corresponding to the target output channel in the current image frame as the target dimming data;

[0103] When it is determined that the current temperature state is a high-temperature state, based on the high-temperature state, determine the first dimming compensation data corresponding to the target unit, and adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain the target dimming data.

[0104] In an alternative embodiment, the compensation processing module is specifically configured to:

[0105] Compare a preset duration threshold with the duration of the high-temperature state;

[0106] When it is determined that the duration of the high-temperature state is greater than the preset duration threshold, determine the first dimming compensation data according to a second correspondence relationship and the current temperature value of the target light-emitting unit;

[0107] Wherein, the second correspondence relationship is used to represent the correspondence relationship between the temperature value and the dimming compensation data, and the current temperature value is determined according to the first dimming cumulative data.

[0108] In an alternative embodiment, the compensation processing module is further configured to:

[0109] When it is determined that the duration of the high-temperature state is less than or equal to the preset duration threshold, use the dimming data corresponding to the target output channel in the current image frame as the target dimming data.

[0110] In an alternative embodiment, the compensation processing module is specifically configured to:

[0111] Use the first dimming compensation data to reduce the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data;

[0112] Wherein, the first dimming compensation data is generated when the duration of the high-temperature state is greater than the preset duration threshold.

[0113] In an alternative embodiment, the state prediction module is further configured to: determine the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in a plurality of second image frames, where the plurality of second image frames are a plurality of image frames displayed within a second time period;

[0114] The compensation processing module is further configured to: determine the target dimming data based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame.

[0115] In an alternative embodiment, the state prediction module is specifically configured to:

[0116] Determine the second dimming cumulative data according to the dimming data corresponding to the target output channel in multiple second image frames, where the starting moment of the second time period is the first power-on moment of the display device;

[0117] Based on the second dimming cumulative data, determine the current aging state of the target light-emitting unit.

[0118] In an optional embodiment, the state prediction module is specifically configured to:

[0119] Based on the third correspondence and the second dimming cumulative data, determine the current aging state, where the third correspondence is used to characterize the correspondence between the dimming cumulative data and the aging state of the light-emitting unit.

[0120] In an optional embodiment, the compensation processing module is specifically configured to:

[0121] Based on the current temperature state, determine the first dimming compensation data corresponding to the target unit, and based on the current aging state, determine the second dimming compensation data corresponding to the target light-emitting unit;

[0122] According to the first dimming compensation data and the second dimming compensation data, adjust the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data.

[0123] In an optional embodiment, the compensation processing module is specifically configured to:

[0124] According to the fourth correspondence and the current aging state, determine the second dimming compensation data, where the fourth correspondence is used to characterize the correspondence between the aging state of the light-emitting unit and the dimming compensation data.

[0125] In an optional embodiment, multiple output channels of the dimmer are color output channels, the first dimming cumulative data is the first dimming cumulative data of the target color, and the target color is the light-emitting color of the target light-emitting unit connected corresponding to the target output channel;

[0126] The state prediction module is specifically configured to:

[0127] According to the target color, determine the first target correspondence in multiple fifth correspondences, and based on the first target correspondence and the first dimming cumulative data of the target color, determine the current temperature state of the target light-emitting unit;

[0128] Wherein, the multiple fifth correspondences are respectively used to characterize the correspondence between the dimming cumulative data of different colors and the temperature state, and the temperature state at least includes a high-temperature state and a normal temperature state;

[0129] The compensation processing module is specifically configured to:

[0130] Compare the duration of maintaining the high temperature state with a preset duration threshold;

[0131] When it is determined that the duration of maintaining the high temperature state is greater than the preset duration threshold, according to the target color, determine a second target correspondence relationship among a plurality of sixth correspondence relationships, and according to the second target correspondence relationship and the current temperature value of the target light-emitting unit, determine the first dimming compensation data;

[0132] Wherein, the plurality of sixth correspondence relationships are respectively used to represent the correspondence relationships between the temperature values of different color light-emitting units and the dimming compensation data, and the current temperature value is determined according to the first dimming cumulative data of the target color.

[0133] In an optional embodiment, the multiple output channels of the dimmer are color output channels, the second dimming cumulative data is the second dimming cumulative data of the target color, and the target color is the light-emitting color of the target light-emitting unit connected to the target output channel in a corresponding manner;

[0134] The state prediction module is specifically configured to:

[0135] According to the target color, determine a third target correspondence relationship among a plurality of seventh correspondence relationships, and based on the third target correspondence relationship and the second dimming cumulative data of the target color, determine the current aging state;

[0136] Wherein, the plurality of seventh correspondence relationships are respectively used to represent the correspondence relationships between the dimming cumulative data of different colors and the aging states of the corresponding color light-emitting units;

[0137] The compensation processing module is specifically configured to:

[0138] According to the target color, determine a fourth target correspondence relationship among a plurality of eighth correspondence relationships, and according to the fourth target correspondence relationship and the current aging state, determine the second dimming compensation data;

[0139] Wherein, the plurality of eighth correspondence relationships are respectively used to represent the correspondence relationships between the aging states of different color light-emitting units and the dimming compensation data.

[0140] In a third aspect, an embodiment of the present invention provides a backlight module, including a plurality of light-emitting units and the display chip as described in the second aspect above, wherein:

[0141] The display chip is electrically connected to the plurality of light-emitting units;

[0142] The light-emitting unit is configured to turn on the backlight according to the received target dimming data.

[0143] For the possible technical effects that can be achieved by the display chip disclosed in the second aspect and the backlight module disclosed in the third aspect, please refer to the description of the possible technical effects that can be achieved by the first aspect or various possible solutions in the first aspect, and details will not be repeated here. Description of the Drawings

[0144] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0145] Figure 1 Schematic diagram showing the relationship between temperature and the life of a light-emitting unit provided by the related art;

[0146] Figure 2 Schematic diagram showing the structures of a display device with a monochromatic backlight and a display device with a color backlight provided by the related art;

[0147] Figure 3 Schematic diagram showing the structure of a display device provided with a temperature sensor provided by the related art;

[0148] Figure 4 Schematic diagram showing the structure of a display device provided by an embodiment of the present invention;

[0149] Figure 5 Schematic diagram showing the working process of a backlight control method provided by an embodiment of the present invention;

[0150] Figure 6 Schematic diagram showing the complete working process of temperature compensation using a backlight control method provided by an embodiment of the present invention;

[0151] Figure 7 Schematic diagram showing the working process of aging compensation using a backlight control method provided by an embodiment of the present invention;

[0152] Figure 8 Schematic diagram showing the complete working process of aging compensation using a backlight control method provided by an embodiment of the present invention;

[0153] Figure 9 Schematic diagram showing the structure of a color backlight unit provided by an embodiment of the present invention;

[0154] Figure 10 Schematic diagram showing the complete working process of temperature compensation for a color backlight unit provided by an embodiment of the present invention;

[0155] Figure 11 It is a schematic diagram of a complete working process for aging compensation of a color backlight unit provided by an embodiment of the present invention;

[0156] Figure 12 It is a schematic diagram of a module structure of a display chip provided by an embodiment of the present invention. Specific embodiments

[0157] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0158] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0159] In recent years, with the rapid development of image display technology, in order to bring a better visual experience to users, display devices have gradually developed in the direction of being larger and more high-performance. In large-sized display devices, a larger-sized display panel will be provided. To adapt to the large-sized display panel, the size of the backlight panel also needs to be increased accordingly. Therefore, the number of dimming controllers, dimmers, and light-emitting units provided on the backlight panel will increase accordingly. However, since the number of dimming controllers, dimmers, and light-emitting units provided on the backlight panel is relatively large, the density of the hardware devices on the backlight panel will become relatively high, and the heat dissipation effect of each device will become poor, resulting in a relatively fast increase in the temperature of the display device and a relatively high temperature.

[0160] In addition, the demand for high-definition, high-quality, and high-brightness display in high-performance display devices is also increasing. To meet the high-performance requirements of display devices, during the process of using local dimming technology for backlight control, higher requirements are put forward for the control accuracy of backlight zones, that is, the number of backlight zones (English: Local Dimming Zone) divided on the backlight panel will correspondingly increase, which will lead to an increase in the number of local dimming data and control instructions to be transmitted, and the high-brightness requirement will cause an increase in the current, which will also increase the probability of the display device being in a high-temperature state.

[0161] However, in practical applications, this high-temperature state will damage the light-emitting units in the backlight unit, resulting in a relatively low actual light-emitting brightness of the light-emitting units and shortening their service life, thus seriously affecting the performance of the display device.

[0162] Figure 1 Fig. shows a schematic diagram of the relationship between temperature and the service life of light-emitting units provided by the related technology. As Figure 1 shown, (a1) is a schematic diagram of the relationship among the ambient temperature, service life, and brightness output of the light-emitting unit, (b1) is a schematic diagram of the relationship between the interface temperature of the light-emitting unit and its service life, and (c1) is a schematic diagram of the relationship among the working current, interface temperature, and service life of the light-emitting unit.

[0163] Referring to Figure 1 in (a1), it can be seen that when the brightness output of the light-emitting unit reaches 90% of its maximum brightness output, at an ambient temperature of 38 °C, the service life of the light-emitting unit is about 2100 hours; while at an ambient temperature of 51 °C, the service life of the light-emitting unit will be shortened to about 6000 hours. Therefore, in practical applications, the higher the ambient temperature of the light-emitting unit, the shorter its own service life.

[0164] Referring to Figure 1 in (b1), it can be seen that as the interface temperature of the light-emitting unit gradually increases, the service life of the light-emitting unit is gradually shortened. For example, when the interface temperature of the light-emitting unit is 40 °C, its service life is about 22230 hours, and when the interface temperature rises to 90 °C, the service life of the light-emitting unit is shortened to about 2230 hours.

[0165] In addition, the degree of shortening of the service life of light-emitting units of different colors will also vary. The shorter the service life of a light-emitting unit, the more severely damaged the device is, and the worse its actual luminous efficiency will be. That is, under the same temperature change, the degree of brightness change of light-emitting units of different colors will be different. For example, when the interface temperature of a light-emitting unit rises from 60 °C to 80 °C, the service life of a red light-emitting unit will be shortened from about 17,230 hours to about 7,230 hours, reducing the service life by 11,100 hours; while the service life of a blue light-emitting unit will be shortened from about 20,230 hours to about 8,723 hours, reducing the service life by 11,723 hours. That is, the degree of shortening of the service life of the blue light-emitting unit will be more severe.

[0166] Therefore, in practical applications, the higher the interface temperature of a light-emitting unit, the shorter its own service life will be. Moreover, the different degrees of shortening of the service lives of light-emitting units of different colors will also lead to different amounts of brightness reduction.

[0167] See Figure 1 From (c1) in, it can be seen that when the interface temperature of a light-emitting unit is 90 °C, for a light-emitting unit with a working current of 350 mA, its service life is about 60,000 hours, while for a light-emitting unit with a working current of 700 mA, its service life will be shortened to about 35,000 hours. Therefore, in practical applications, the greater the working current of a light-emitting unit, the higher its interface temperature will be, and the shorter its service life will be.

[0168] In summary, for a light-emitting unit, an increase in temperature will lead to a shortening of its own service life.

[0169] In addition, with the development of backlight technology, display devices are no longer limited to monochromatic backlight units (English: MonoBLU), and color backlight units (English: Color BLU) are also widely used in various display devices, as follows:

[0170] Figure 2 Shows the structural schematic diagrams of a display device with a monochromatic backlight and a display device with a color backlight provided by the related art. As Figure 2 shown, (a2) is the structural schematic diagram of a display device with a monochromatic backlight, and (b2) is the structural schematic diagram of a display device with a color backlight.

[0171] See Figure 2 In (a2), in the display device with a monochromatic backlight, the light-emitting units provided on the backlight panel 21-A are monochromatic light-emitting units. For example, any one of a white light-emitting unit, a yellow light-emitting unit, etc. can be used. By controlling the different luminous brightnesses of the monochromatic light-emitting units on the backlight panel 21-A, corresponding backlight is provided for the display panel 23.

[0172] See Figure 2(b2) In a display device with a color backlight, the light-emitting units provided on the backlight panel 21-B are color light-emitting units. For example, red light-emitting units, green light-emitting units, and blue light-emitting units can be used, or red light-emitting units, green light-emitting units, blue light-emitting units, and white light-emitting units, etc. By controlling the different light-emitting brightness of the color light-emitting units on the backlight panel 21-A, corresponding backlight is provided for the display panel 23.

[0173] As can be seen from the foregoing discussion, the higher the temperature, the shorter the service life of the light-emitting unit, the lower the light-emitting efficiency of the light-emitting unit, and the lower the actual light-emitting brightness of the light-emitting unit. However, in the architecture of a display device with a color backlight, there are not only problems that high temperature states damage the life of the light-emitting unit, but also problems that as the temperature rises, the brightness reduction amounts of different color light-emitting units are different. When the actual brightness of each light-emitting unit deviates from the theoretical brightness to varying degrees, it will cause a color cast problem in the actually presented colors, and further lead to a white balance (English: White Balance) collapse problem of the display device, seriously affecting the performance of the display device.

[0174] To reduce the impact of high temperature states on display devices, temperature sensors for monitoring the temperature of light-emitting units are usually provided in display devices in the prior art, and the light-emitting units are controlled to stop emitting light at a specific temperature. Taking a display device with a monochromatic backlight as an example, it is briefly described as follows:

[0175] Figure 3 shows a schematic structural diagram of a display device provided with a temperature sensor in the related art. As Figure 3 shown, (a3) is a schematic structural diagram of a display device with the temperature sensor provided inside the dimmer, and (b3) is a schematic structural diagram of a display device with the temperature sensor provided outside the dimmer.

[0176] Referring to Figure 3 in (a3), a plurality of dimmers 212 are provided on the backlight panel 21-A. Each dimmer 212 has a plurality of output channels, and one output channel is correspondingly connected to at least one light-emitting unit 213. A temperature sensor 215 is provided inside the dimmer 212, and the temperature sensor 215 can monitor the temperature of the light-emitting unit 213 correspondingly connected to each output channel of the dimmer 212 in real time.

[0177] Referring to Figure 3 in (b3), a plurality of dimmers 212 are provided on the backlight panel 21-A. Each dimmer 212 has a plurality of output channels, and one output channel is correspondingly connected to at least one light-emitting unit 213. A temperature sensor 215 is provided at a fixed position of the backlight panel 21-A, and the temperature sensor 215 can monitor the temperature of the light-emitting unit 213 within its own temperature sensing range in real time.

[0178] In addition, Figure 3 Both (a3) and (b3) in are examples where one output channel corresponds to connecting multiple light-emitting units 213. The multiple light-emitting units 213 corresponding to one output channel are in a cascaded connection relationship. Among the multiple light-emitting units 213, the cathode of the light-emitting unit 213 closest to the dimmer 212 is electrically connected to the output channel of the dimmer 212, and the anode of the light-emitting unit 213 farthest from the dimmer 212 is electrically connected to the power converter 216. The power converter 216 is also electrically connected to the dimming controller 22 and is used to perform conversion processing on the received initial voltage to generate a power supply voltage suitable for the light-emitting unit 213.

[0179] However, no matter which of the above-mentioned temperature sensor setting methods is adopted, although in the prior art, remedial measures of controlling the light-emitting unit to stop emitting light are taken, the high-temperature damage to the light-emitting unit has actually been caused. Therefore, this method in the prior art essentially cannot extend the service life of the light-emitting unit.

[0180] In addition, since multiple temperature sensors need to be additionally added, this will complicate the structure of the backlight unit. Correspondingly, the manufacturing process of the backlight panel will also become complicated, thereby increasing the manufacturing cost of the display device.

[0181] Furthermore, Figure 3 This provided design architecture is not applicable to display devices with color backlights, and it cannot solve the problem of white balance collapse existing in the color backlight unit in a high-temperature state.

[0182] Based on this, the embodiments of the present invention provide a backlight control method, a display chip, and a backlight module to reduce the damage caused by the high-temperature state to the light-emitting unit, extend the service life of the light-emitting unit, and compensate for the light-emitting unit with reduced luminous efficiency without additionally setting temperature sensors, ensure the HDR requirements of the display device. In addition, it can also avoid the problem of white balance collapse in display devices with color backlights and improve the performance of the display device.

[0183] The realization of the purpose, functional features, and advantages of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. And without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0184] Next, the application scenario of the backlight control method provided by the embodiments of the present invention will be introduced with reference to the accompanying drawings:

[0185] The backlight control method provided by the embodiments of the present invention can be applied in a display device, such as Figure 4As shown, the display device 300 generally includes a timing controller 310, a dimming controller 320, a display panel 330, and a backlight panel 340; the timing controller 310 is respectively connected to the dimming controller 320 and the display panel 330, and the dimming controller 320 is further connected to the backlight panel 340; the display panel 330 and the backlight panel 340 are oppositely arranged, and the display panel 330 is located on the light-emitting side of the backlight panel 340. Among them, a dimming device 341 and a light-emitting unit 342 are provided on the backlight panel 340; the dimming device 341 is electrically connected to the cathode of the light-emitting unit 342, and the anode of the light-emitting unit 342 is electrically connected to the power supply terminal VDD. Exemplarily, the light-emitting unit 342 may adopt a direct-lit AM mini-LED (English: Active Matrix Mini Light Emitting Diode, Chinese: active matrix submillimeter light emitting diode).

[0186] In practical applications, the timing controller 310 in the embodiment of the present invention may adopt a TCON (English: Timing Controller, Chinese: timing controller) chip, or may adopt an SoC (English: System on Chip, Chinese: system-on-chip), or may also adopt other chips or circuits with timing control functions, such as a screen driving circuit, etc. The embodiment of the present invention does not impose any restrictions on this.

[0187] In addition, the dimming controller 320 in the embodiment of the present invention may adopt a dimming control chip, or may adopt an MCU (English: Microcontroller Unit, Chinese: microcontroller unit), or may also adopt other chips or circuits with backlight control functions. The embodiment of the present invention also does not impose any restrictions on this.

[0188] It should be noted that the architecture of the backlight panel 340 in the display device 300 provided by the embodiment of the present invention may adopt an existing backlight panel architecture, and the embodiment of the present invention does not impose any restrictions on this.

[0189] In a specific implementation, the timing controller 310 generates local dimming data according to the display data corresponding to an image frame, and sends the local dimming data to the dimming controller 320, and sends the display data to the display panel 330. The dimming controller 320 processes the received local dimming data, and sends the processed local dimming data to the backlight panel 340; the dimmer 341 in the backlight panel 340 generates PWM local dimming data according to the received local dimming data, and sends the PWM local dimming data to the light-emitting unit 342 connected thereto to control the lighting of the light-emitting unit 342, so as to provide corresponding backlight for the display panel 330; the display panel 330 can display the image frame according to the received display data and using the backlight provided by the backlight panel 340.

[0190] Of course, the method provided by the embodiments of the present invention is not limited to Figure 4 the application scenarios shown, and can also be used in other possible application scenarios, and the embodiments of the present invention do not make any limitations.

[0191] The following specifically introduces the method for transmitting dimming data provided by the embodiments of the present invention with reference to the accompanying drawings:

[0192] The backlight control method provided by the embodiments of the present invention can be applied to various display chips, such as dimmers, dimming controllers, MCUs, SoCs, TCONs and other chips, and the embodiments of the present invention do not make any limitations thereto.

[0193] Figure 5 shows a schematic working flow diagram of a backlight control method provided by an embodiment of the present invention. As Figure 5 shown, the backlight control method of the embodiment of the present invention can specifically include the following steps:

[0194] Step S501, determining the current temperature state of the target light-emitting unit according to the dimming data corresponding to the target output channel in a plurality of first image frames.

[0195] Wherein, the plurality of first image frames are a plurality of image frames displayed within a first time period, the target output channel is any one of the plurality of output channels of the dimmer, and the target light-emitting unit is the light-emitting unit correspondingly connected to the target output channel.

[0196] In some embodiments, the start time of the first time period is not earlier than the power-on time of the display device, and the end time of the first time period is not later than the power-off time of the display device. In a specific implementation, the first time period can be set to any integer multiple of the display period corresponding to an image frame, or the first time period can be set to a fixed duration, such as 10 minutes, 20 minutes, etc. It can also be set to the entire duration of one power-on operation and the corresponding power-off operation of the display device, and it can be flexibly set according to actual application requirements. The embodiments of the present invention do not impose any restrictions on this.

[0197] In addition, in the embodiments of the present invention, an image frame corresponds to multiple dimming data, and one dimming data is used to control the light-emitting units connected to one output channel of the dimmer. Taking the dimmer having 4 output channels as an example, the dimmer will receive 4 dimming data. One dimming data is transmitted to the subsequent light-emitting units through one output channel of the dimmer, and is used to control the lighting of one or more light-emitting units corresponding to and connected to this output channel.

[0198] In some embodiments, the following implementation methods can be adopted during the execution of step S501:

[0199] Step S501-1: Determine the first dimming cumulative data according to the dimming data corresponding to the target output channel in multiple first image frames.

[0200] In one implementation method, if the display chip uses a dimmer, the display chip can specifically determine the first dimming cumulative data in the following way:

[0201] For any first image frame, the display chip will determine the dimming data corresponding to the target output channel among the corresponding N dimming data received by itself; the display chip accumulates all the determined dimming data corresponding to the target output channel to obtain the first dimming cumulative data; where N = the number of output channels of a dimmer.

[0202] In another implementation method, if the display chip uses any one of a dimming controller, an MCU, an SoC, and a TCON, the display chip can specifically determine the first dimming cumulative data in the following way:

[0203] For any first image frame, the display chip will determine the dimming data corresponding to the target output channel among the corresponding M dimming data received by itself; the display chip accumulates all the determined dimming data corresponding to the target output channel to obtain the first dimming cumulative data; where M = the number of output channels of a dimmer × the number of dimmers on the backlight panel, and the target output channel is any output channel of any dimmer.

[0204] Further, in the embodiments of the present invention, the dimming data includes current data and PWM data. Then, the display chip can specifically determine the first cumulative dimming data in the following manner:

[0205] The display chip can perform an accumulation process on the current data in the dimming data corresponding to the target output channel to obtain the first cumulative current data, and / or perform an accumulation process on the PWM data in the dimming data corresponding to the target output channel to obtain the first cumulative PWM data; wherein, the first cumulative dimming data includes the first cumulative current data and / or the first cumulative PWM data.

[0206] Specifically, in the embodiments of the present invention, during the accumulation of the dimming data to generate the first cumulative dimming data, only the current data in the dimming data can be accumulated. In this way, the first cumulative dimming data generated includes the first cumulative current data; or only the PWM data in the dimming data can be accumulated. In this way, the first cumulative dimming data generated includes the first cumulative PWM data; or the current data and the PWM data can be accumulated simultaneously. In this way, the first cumulative dimming data generated includes the first cumulative current data and the first cumulative PWM data. The embodiments of the present invention do not impose any restrictions on this.

[0207] In addition, in the embodiments of the present invention, in order to perform the accumulation operation, a non-volatile memory can be used as the storage module to cache the dimming data. For example, flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), etc. can be used. In practical applications, depending on the different design architectures of the display device, the storage module can be presented in the form of an internal memory of the display chip or in the form of an external memory of the display chip. The embodiments of the present invention do not impose any restrictions on this.

[0208] In the above embodiments, since the dimming data includes current data and PWM data, when accumulating the dimming data corresponding to the target output channel, the current data can be accumulated, the PWM data can be accumulated, or the current data and the PWM data can be accumulated simultaneously to generate the first cumulative dimming data for temperature state prediction, and its calculation method is flexible.

[0209] Step S501-2: Determine the current temperature state of the target light-emitting unit based on the first cumulative dimming data.

[0210] In the embodiments of the present invention, during the process of the display chip predicting the current temperature state of the target light-emitting unit using the first cumulative dimming data, there are at least the following two feasible implementation methods:

[0211] Method 1:

[0212] In some embodiments, the display chip may directly determine the current temperature state of the target light-emitting unit based on the first correspondence and the first dimming cumulative data; wherein, the first correspondence is used to characterize the correspondence between the dimming cumulative data and the temperature state, and the temperature state at least includes a normal temperature state and a high temperature state.

[0213] As shown in Table 1, an example of the first correspondence provided in the embodiments of the present invention is as follows:

[0214] Dimming cumulative data Data1 Temperature status 0 ≤ Data1 < A Normal temperature status Data1 ≥ A High temperature status

[0215] Table 1

[0216] Wherein, A in Table 1 is a preset dimming data threshold. When the dimming cumulative data Data1 < A, it can be determined that the light-emitting unit is in a normal temperature state; when the dimming cumulative data Data1 ≥ A, it can be determined that the light-emitting unit is in a high temperature state.

[0217] Specifically, the display chip may determine the temperature state corresponding to the first dimming cumulative data in the first correspondence according to the first dimming cumulative data, and use the determined temperature state as the current temperature state of the target light-emitting unit. For example, when it is determined that the first dimming cumulative data is any value ≥ A, it can be determined that the target light-emitting unit is in a high temperature state.

[0218] It should be noted that the first correspondence in the embodiments of the present invention, as well as each correspondence in the subsequent embodiments, may exist in the form of a look-up table (abbreviation: LUT in English), which will not be elaborated in the subsequent embodiments. In addition, each correspondence provided in the embodiments of the present invention may be constructed according to the characteristic experimental structure of the mini-LED or the specification data of the mini-LED; when conducting the characteristic experiment of the mini-LED, fixed current data and PWM data may be input to the independent mini-LED, and various characteristic parameters of the mini-LED under different inputs may be measured, so as to construct each correspondence provided in the embodiments of the present invention according to the obtained various characteristic parameters.

[0219] Method 2:

[0220] In some embodiments, the display chip may determine the current temperature value of the target light-emitting unit based on the first correspondence and the first dimming cumulative data, wherein the first correspondence is used to characterize the correspondence between the dimming cumulative data and the temperature value; compare the preset temperature threshold with the current temperature value. If the current temperature value is greater than or equal to the preset temperature threshold, it is determined that the current temperature state is a high temperature state; if the current temperature value is less than the preset temperature threshold, it is determined that the current temperature state is a normal temperature state.

[0221] As shown in Table 2, another example of the first correspondence provided in the embodiments of the present invention is as follows:

[0222] Dimming cumulative data Data1 Temperature value 0 ≤ Data1 < B1 10℃ B1 ≤ Data1 < B2 15℃ … … Bi ≤ Data1 < Bi+1 75℃ … …

[0223] Table 2

[0224] Among them, B1, B2, B3, …, Bi, Bi+1, … in Table 2 are preset multi-level dimming data thresholds, and B1, B2, B3, …, Bi, Bi+1, … gradually increase. In practical applications, the temperature value of the light-emitting unit can be determined according to the range of the dimming cumulative data threshold to which the calculated dimming cumulative data Data1 belongs.

[0225] Specifically, the display chip can determine the temperature value corresponding to the first dimming cumulative data in the first correspondence according to the first dimming cumulative data, and use the determined temperature value as the current temperature value of the target light-emitting unit. For example, when it is determined that B1 ≤ the first dimming cumulative data < B2, the current temperature value of the target light-emitting unit = 15°C.

[0226] It can be understood that the value of the first dimming cumulative data is in a direct proportional relationship with the temperature value of the light-emitting unit, that is, the larger the value of the first dimming cumulative data, the higher the light-emitting brightness of the light-emitting unit, the higher the temperature value of the light-emitting unit, and the shorter the service life of the light-emitting unit. Therefore, it can be considered that the value of the first dimming cumulative data is in an inverse proportional relationship with the service life of the light-emitting unit.

[0227] Then, compare the current temperature value with the preset temperature threshold. When it is determined that the current temperature value ≥ the preset temperature threshold, it can be determined that the target light-emitting unit is in a high-temperature state; otherwise, it is determined that the target light-emitting unit is in a normal temperature state.

[0228] In the above embodiments, by using the first correspondence and the first dimming cumulative data, the current temperature state of the target light-emitting unit is predicted. Without additionally adding a temperature sensor, the current temperature state of the target light-emitting unit can be determined, and a temperature compensation operation based on the current temperature state can be performed to reduce the influence of the high-temperature state on the light-emitting unit and extend the service life of the light-emitting unit; and since there is no need to add an additional temperature sensor, compared with the prior art method of performing high-temperature compensation by setting a temperature sensor, it is neither necessary to change the backlight panel structure, simplify the production process, nor reduce the cost of the display device.

[0229] Step S502, based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, determine the target dimming data, and control the backlight brightness of the target light-emitting unit according to the target dimming data.

[0230] In some embodiments, the display chip may determine first dimming compensation data corresponding to a target light-emitting unit based on the current temperature state, and adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain target dimming data, specifically as follows:

[0231] Step S502-1: When it is determined that the current temperature state is a normal temperature state, the display chip will use the dimming data corresponding to the target output channel in the current image frame as the target dimming data.

[0232] In specific implementation, if the light-emitting unit is in a normal temperature state, there is no need to adjust the dimming data corresponding to the target output channel in the current image frame. Directly use it as the target dimming data and perform the backlight control of the target light-emitting unit. That is, keep the dimming data corresponding to the target output channel in the current image frame unchanged to ensure an ideal backlight brightness for image display.

[0233] Step S502-2: When it is determined that the current temperature state is a high temperature state, the display chip will determine first dimming compensation data corresponding to the target unit based on the high temperature state, and adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain the target dimming data.

[0234] In some embodiments, when it is determined that the current temperature state of the target light-emitting unit is a high temperature state, the display chip may compare a preset duration threshold with the duration of the high temperature state; if the duration of the high temperature state is greater than the preset duration threshold, determine the first dimming compensation data according to the second corresponding relationship and the current temperature value of the target light-emitting unit; wherein, the second corresponding relationship is used to represent the corresponding relationship between the temperature value and the dimming compensation data.

[0235] Specifically, the display chip may determine the dimming compensation data corresponding to the current temperature value in the second corresponding relationship, and use the determined dimming compensation data as the first dimming compensation data corresponding to the target light-emitting unit.

[0236] In addition, if the duration of the high temperature state is less than or equal to the preset duration threshold, the display chip will directly use the dimming data corresponding to the target output channel in the current image frame as the target dimming data. That is, keep the dimming data unchanged.

[0237] In the above embodiments, when it is determined that the duration of maintaining the current temperature state is greater than the preset duration threshold, the first dimming compensation data corresponding to the target light-emitting unit is extracted by using the second corresponding relationship, so as to perform high-temperature compensation processing on the target light-emitting unit, reduce the damage of high temperature to the light-emitting unit, and extend the service life of the light-emitting unit. In addition, when it is determined that the duration of maintaining the high-temperature state is less than or equal to the preset duration threshold, it indicates that the temperature causes less damage to the light-emitting unit at this time. Then, the dimming data corresponding to the target output channel in the current image frame can be directly used as the target dimming data, that is, the dimming data corresponding to the target output channel in the current image frame remains unchanged, so as to ensure an ideal backlight brightness for image display.

[0238] Among them, in the process of performing step S502-2 to perform temperature compensation on the dimming data and determine the target dimming data, the following method can be specifically adopted:

[0239] In some embodiments, when the display chip determines that the duration of maintaining the high-temperature state is greater than the preset duration threshold, it can use the first dimming compensation data to reduce the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data.

[0240] Specifically, the dimming data includes current data and PWM data. In the process of using the first dimming compensation data to reduce the dimming data corresponding to the target output channel in the current image frame, only the current data can be reduced to reduce the working current of the target light-emitting unit during the display of the current image frame; or only the PWM data can be reduced to reduce the duty cycle or amplitude of the PWM signal used to control the light emission of the target light-emitting unit during the display of the current image frame; or both the current data and the PWM data can be reduced, which can be flexibly set according to actual needs, and the embodiments of the present invention do not impose any restrictions on this.

[0241] In specific implementation, the first dimming compensation data can be a negative value, and the display chip can use the sum value of the first dimming compensation data and the dimming data corresponding to the target output channel in the current image frame as the target dimming data. Of course, it should be understood that this embodiment is only an exemplary illustration. In actual applications, any other feasible method can also be used to reduce the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data, and the embodiments of the present invention do not impose any restrictions on this.

[0242] In the above embodiments, the reduction of the dimming data will cause the working current or the lighting frequency of the target light-emitting unit to decrease, so that the heat generated by the target light-emitting unit decreases, and the temperature of the target light-emitting unit also correspondingly decreases, so as to achieve the purpose of reducing the temperature of the light-emitting unit, avoid damage to the light-emitting unit caused by continuous high-temperature state, and extend the service life of the light-emitting unit.

[0243] In some embodiments, after obtaining the target dimming data, the display chip further accumulates the target dimming data and the first cumulative dimming data, and updates the first cumulative dimming data according to the accumulation result.

[0244] Figure 6 The figure shows a schematic diagram of the overall working process of temperature compensation using the backlight control method provided by an embodiment of the present invention. As Figure 6 shown, it may include the following steps:

[0245] Step S601, for any one of the multiple output channels of the dimmer, determine the first cumulative dimming data according to the dimming data corresponding to the output channel in the multiple first image frames;

[0246] Step S602, based on the first correspondence relationship and the determined multiple first cumulative dimming data, respectively determine the current temperature states of the light-emitting units connected to the respective output channels of each dimmer;

[0247] Step S603, if the current temperature state is a high temperature state, determine whether the duration of maintaining the high temperature state is greater than a preset duration threshold. If so, execute step S604; otherwise, execute step S606;

[0248] Step S604, based on the first correspondence relationship and the current temperature values of the multiple light-emitting units, determine the first dimming compensation data corresponding to each light-emitting unit;

[0249] Step S605, use the first dimming compensation data corresponding to each light-emitting unit to respectively reduce the dimming data corresponding to each output channel in the current image frame to obtain the target dimming data, and update the corresponding first cumulative dimming data using the target dimming data;

[0250] Step S606, directly use the dimming data corresponding to each output channel in the current image frame as the target dimming data, and update the corresponding first cumulative dimming data using the target dimming data.

[0251] In the embodiments of the present invention, by using multiple dimming data corresponding to the target output channel within a period of time to predict the current temperature state of the target light-emitting unit, and using the predicted current temperature state to perform temperature compensation on the dimming data transmitted to the target light-emitting unit, since no additional temperature sensor is required, it can effectively reduce the development cost of the device.

[0252] In addition, since the determination of the current temperature state depends on the cumulative data of the dimming data of multiple target output channels over a period of time, that is, the influence of continuous temperature rise on the target light-emitting unit can be taken into account. Therefore, temperature compensation is performed according to the current temperature state, and the backlight is controlled using the supplemented dimming data, which can reduce the damage caused by high temperature to the light-emitting unit and effectively extend the service life of the light-emitting unit.

[0253] Furthermore, by using the dimming cumulative data of each output channel to specifically compensate the light-emitting units corresponding to each output channel, the compensation effect of this specific temperature compensation method is more superior, and the performance of the display device can be effectively improved.

[0254] For ease of understanding, an example is given below for a simple explanation:

[0255] Taking the example of a user browsing a document on a personal computer, since there are white background areas and black text areas in the document, when the user browses the document for a long time, the brightness of the light-emitting units on the backlight panel corresponding to the white background areas remains relatively high, and the temperature of these light-emitting units will also increase rapidly; while the brightness of the light-emitting units on the backlight panel corresponding to the black text areas is relatively low, and the temperature of these light-emitting units will increase more slowly. The backlight control method provided by the embodiments of the present invention can achieve targeted compensation for the brightness of the light-emitting units on the backlight panel corresponding to the white background areas, adjust the brightness of these light-emitting units adaptively smaller, and while not affecting the user's visual experience, avoid damage to these light-emitting units in a high-temperature state and affect their lifespan.

[0256] Furthermore, the backlight control method provided by the embodiments of the present invention can not only achieve temperature compensation for the light-emitting units, but also take into account the influence of the aging state of the light-emitting units on their actual light-emitting brightness, and perform compensation accordingly to further optimize the performance of the display device, as follows:

[0257] Figure 7 Fig. shows a schematic working flow diagram of aging compensation using the backlight control method provided by an embodiment of the present invention. As Figure 7 shown, it may include the following steps:

[0258] Step S701, determine the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple second image frames, where the multiple second image frames are multiple image frames displayed within a second time period.

[0259] In some embodiments, the starting moment of the second time period is the moment of the first power-on of the display device.

[0260] In a specific implementation, the second time period may be the entire life cycle of the display device, that is, from the first power-on of the display device to the last power-off of the display device. Simply put, for the first dimming cumulative data, when the end moment of the first time period arrives, the first dimming data will be cleared, while for the second dimming cumulative data, the dimming data will be accumulated from the first image display of the display device and will not be cleared in the middle.

[0261] In some embodiments, the following implementation manner may be adopted during the execution of step S701:

[0262] Step S701-1: Determine the second dimming cumulative data according to the dimming data corresponding to the target output channel in multiple second image frames.

[0263] It should be understood that the implementation manner of generating the second dimming cumulative data in step S701 may refer to the implementation manner of generating the first dimming cumulative data in step S501-1, so it will not be elaborated here.

[0264] Step S701-2: Determine the current aging state of the target light-emitting unit based on the second dimming cumulative data.

[0265] In some embodiments, during the execution of step S701-2 by the display chip, the following manner may be specifically adopted: The display chip may determine the current aging state based on the third correspondence relationship and the second dimming cumulative data, where the third correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the aging state of the light-emitting unit.

[0266] As shown in Table 3, an example of the third correspondence relationship provided in the embodiments of the present invention is as follows:

[0267] Dimming cumulative data Data2 Aging status 0 ≤ Data2 < C1 First-level aging status C1 ≤ Data2 < C2 Second-level aging status C2 ≤ Data2 < C3 Third-level aging status … …

[0268] Table 3

[0269] Among them, C1, C2, C3,... in Table 3 are preset multi-level dimming data thresholds, and C1, C2, C3,... gradually increase. In practical applications, the aging state of the light-emitting unit may be determined according to the range of the dimming data threshold to which the calculated dimming cumulative data Data2 belongs. In addition, the aging states in Table 3 increase step by step, that is, the aging degree of the light-emitting unit corresponding to the first-level aging state is lower than the aging degree of the light-emitting unit corresponding to the second-level aging state.

[0270] Specifically, the display chip can determine the aging state corresponding to the second dimming cumulative data in the third correspondence relationship according to the second dimming cumulative data, and use the determined aging state as the current aging state of the target light-emitting unit. For example, when it is determined that C1 ≤ the second dimming cumulative data < C2, the current aging state of the target light-emitting unit is the second-level aging state.

[0271] It can be understood that the value of the second dimming cumulative data is in a direct proportional relationship with the aging state of the light-emitting unit, that is, the larger the value of the second dimming cumulative data, the higher the usage frequency of the light-emitting unit, and the more serious the aging degree of the light-emitting unit.

[0272] Step S702: Determine the target dimming data based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame.

[0273] In some embodiments, the following implementation manner can be adopted during the execution of step S702:

[0274] Step S720-1: Determine the first dimming compensation data corresponding to the target light-emitting unit based on the current temperature state, and determine the second dimming compensation data corresponding to the target light-emitting unit based on the current aging state.

[0275] In some embodiments, when the display chip executes step S720-1, specifically, the following manner can be adopted: when the display chip determines that the current temperature state is a high-temperature state, the display chip will determine the first dimming compensation data corresponding to the target unit based on the high-temperature state and the second correspondence relationship; in addition, the display chip will also determine the second dimming compensation data according to the fourth correspondence relationship and the current aging state, where the fourth correspondence relationship is used to characterize the correspondence relationship between the aging state of the light-emitting unit and the dimming compensation data.

[0276] Specifically, the display chip can determine the dimming compensation data corresponding to the current aging state in the fourth correspondence relationship according to the current aging state, and use the determined dimming compensation data as the second dimming compensation data corresponding to the target light-emitting unit.

[0277] In the above embodiments, by using the third correspondence relationship to predict the current aging state of the target light-emitting unit, and determining the second dimming compensation data corresponding to the current aging state according to the predicted current aging state and the fourth correspondence relationship, so as to use the second dimming compensation data to compensate the dimming data, the reduced luminous brightness of the light-emitting unit due to its own aging is restored to normal, ensuring the HDR requirements of the display device and improving the display effect of the display device.

[0278] Step S702-2: Adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data and the second dimming compensation data to obtain the target dimming data.

[0279] In some embodiments, after obtaining the target dimming data, the display chip further accumulates the target dimming data and the second cumulative dimming data, and updates the second cumulative dimming data according to the accumulation result.

[0280] In the above embodiments, the second cumulative dimming data determined by the dimming data corresponding to the target output channel in multiple second image frames is further used to predict the current aging state of the target light-emitting unit, and the second dimming compensation data is determined according to the current aging state; then, the temperature compensation operation is performed on the dimming data corresponding to the target output channel in the current image frame by using the first dimming compensation data and the second dimming compensation data, so that when the target light-emitting unit controls its own brightness according to the compensated target dimming data, the phenomenon of the actual light-emitting brightness reduction caused by the aging of the light-emitting unit can be alleviated. While ensuring that the light-emitting unit itself is not damaged, the actual light-emitting brightness of the light-emitting unit is controlled to be close to the theoretical light-emitting brightness, ensuring the display effect of the image and improving the performance of the display device.

[0281] In the embodiments of the present invention, there are various feasible implementation manners in the process of the display chip performing dimming compensation according to the first dimming compensation data and the second dimming compensation data. Two of them are specifically introduced below:

[0282] In one implementation manner, the display chip can use the first dimming compensation data to reduce the dimming data corresponding to the target output channel in the current image frame to obtain intermediate dimming data; then, use the second dimming compensation data to increase the intermediate dimming data to obtain the target dimming data.

[0283] Specifically, the dimming data sent to the light-emitting unit can be reduced by the first dimming compensation data to lower the brightness of the light-emitting unit, thereby reducing the temperature of the light-emitting unit and preventing the light-emitting unit from being damaged due to a continuous high-temperature state, and prolonging the service life of the light-emitting unit. However, as the display device is used, the light-emitting unit will inevitably age day by day, its light-emitting efficiency will become lower, and the actual light-emitting brightness will be lower than the theoretical light-emitting brightness. Therefore, when the display brightness is low after high-temperature compensation, the second dimming compensation data can be used to adaptively increase the dimming data after high-temperature compensation to increase the brightness of the light-emitting unit and ensure the display performance of the display device.

[0284] In another implementation manner, the display chip can determine a target dimming compensation data according to the first dimming compensation data and the second dimming compensation data, and use the target dimming compensation data to adjust the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data.

[0285] Specifically, the first dimming compensation data and the second dimming compensation data can be weighted and calculated to obtain the target dimming compensation data, so as to balance the display performance of the display device.

[0286] In the above embodiments, the first dimming data and the second dimming data can be used to compensate the dimming data corresponding to the target output channel in the current image frame, so as to control the reduced luminous brightness of the light-emitting unit due to its own aging to return to normal while ensuring that the light-emitting unit itself will not be affected by the high-temperature state, so that the actual luminous brightness of the light-emitting unit is close to the theoretical luminous brightness, and the performance of the display device is improved.

[0287] Figure 8 The figure shows a schematic diagram of the overall working process of aging compensation using the backlight control method provided by an embodiment of the present invention. As Figure 8 shown, it may include the following steps:

[0288] Step S801: Accumulate the dimming data corresponding to the target output channel in multiple second image frames to determine the second cumulative dimming data;

[0289] Step S802: Based on the second cumulative dimming data and the third correspondence, determine the current aging state of the target light-emitting unit;

[0290] Step S803: Based on the current aging state and the fourth correspondence, determine the second dimming compensation data corresponding to the target light-emitting unit;

[0291] Step S804: Adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data and the second dimming compensation data to obtain the target dimming data, and control the backlight brightness of the target light-emitting unit according to the target dimming data.

[0292] Furthermore, the backlight control method provided by the embodiment of the present invention can be applied not only to the display device with a monochromatic backlight unit, but also to the display device with a color backlight unit. And when it is applied to the display device with a color backlight unit, it can effectively maintain the white balance and ensure the display performance of the display device, as follows:

[0293] Figure 9 The figure shows a schematic diagram of the structure of a color backlight unit provided by an embodiment of the present invention.

[0294] As Figure 9As shown, in the color backlight unit, the colors of the light-emitting units connected to different output channels of the dimmer 341 are also different. That is, the R output channel of the dimmer 341 is connected to the R-color light-emitting unit, the G output channel of the dimmer 341 is connected to the G-color light-emitting unit, and the B output channel of the dimmer 341 is connected to the B-color light-emitting unit. Therefore, the multiple output channels of the dimmer 341 are color output channels. The dimmer 341 will send the dimming data corresponding to the color to the corresponding output channel, that is, send the dimming data corresponding to the R color to the R output channel of the dimmer 341, send the dimming data corresponding to the G color to the G output channel of the dimmer 341, and send the dimming data corresponding to the B color to the B output channel of the dimmer 341.

[0295] In a specific implementation, in the color backlight unit architecture, during the process of performing an accumulation operation on the dimming data to obtain the first dimming accumulated data, the dimming data of each color will be accumulated separately. Specifically, the dimming data corresponding to each output channel within the first time period will be accumulated. Since the output channels are color output channels, one output channel is connected to a light-emitting unit of one color and receives the dimming data of one color. Therefore, by accumulating the dimming data corresponding to each output channel, the accumulation operation of the dimming data by color can be achieved. At this time, the generated first dimming accumulated data is the dimming accumulated data corresponding to the color. In addition, its specific implementation manner is similar to the implementation manner of the accumulation of the first dimming data corresponding to step S501-1, and the implementation manner of the corresponding embodiment of step S501-1 can be referred to, so it will not be elaborated here.

[0296] It should be understood that for the sake of convenience of description, Figure 9 the RGB three-color backlight unit is taken as an example. In practical applications, the types of colors of the light-emitting units in the color backlight unit can also be other color combinations, such as dual-color (RG and B, or RB and G, or BG and R) backlight units, four-color (R, G, B, and W) backlight units, etc. The embodiments of the present invention do not impose any restrictions on this.

[0297] In some embodiments, the first dimming accumulated data obtained in the color backlight unit architecture is the first dimming accumulated data of the target color, and the target color is the light-emitting color of the target light-emitting unit corresponding to the target output channel. Therefore, the current temperature state of the target light-emitting unit can be determined in the following manner:

[0298] The display chip can determine the first target correspondence relationship among multiple fifth correspondence relationships according to the target color; and based on the first target correspondence relationship and the first dimming accumulated data of the target color, determine the current temperature state of the target light-emitting unit.

[0299] In the embodiments of the present invention, in the color backlight unit architecture, multiple fifth correspondence relationships are correspondingly set according to the types and quantities of the colors of the light-emitting units. The multiple fifth correspondence relationships are respectively used to represent the correspondence relationships between the dimming cumulative data of different colors and the temperature states, and the temperature states at least include a high-temperature state and a normal temperature state. For example, assuming that the color backlight unit is an R, G, B three-color backlight unit, then 3 fifth correspondence relationships are correspondingly set, namely the fifth correspondence relationship of the R color, the fifth correspondence relationship of the G color, and the fifth correspondence relationship of the B color.

[0300] In a specific implementation, if the first dimming cumulative data is the dimming cumulative data of the R color, the display chip will use the fifth correspondence relationship of the R color as the first target correspondence relationship, and based on the first dimming cumulative data, determine the temperature state corresponding to the first dimming cumulative data in the first target correspondence relationship, and use the determined temperature state as the current temperature state of the target light-emitting unit. The same processing is performed for each color respectively to obtain the current temperature states corresponding to the light-emitting units of each color.

[0301] In the above embodiments, in the color backlight unit architecture, the colors of the light-emitting units connected to different output channels of the dimmer are also different, that is, the output channels of the dimmer are color output channels. At this time, for the light-emitting units of a certain color (i.e., the target color), it is necessary to use the first target correspondence relationship corresponding to this color and the first cumulative data of this color to predict the current temperature state of the target light-emitting unit, and use the current temperature state to perform a high-temperature compensation operation on the target light-emitting unit. Since there are different fifth correspondence relationships for different colors of the light-emitting units, and the current temperature states of the light-emitting units of the corresponding colors are predicted accordingly, it is possible to perform targeted compensation for the light-emitting units of different colors, avoiding the occurrence of the white balance collapse problem caused by different brightness reduction amounts of the light-emitting units of different colors as the temperature rises, ensuring the image display effect of the display device, and improving the performance of the display device.

[0302] In some embodiments, after obtaining the current temperature states corresponding to the light-emitting units of each color, the display chip can determine the first dimming compensation data through the following method:

[0303] When the current temperature state is a high-temperature state, compare the duration of the high-temperature state with a preset duration threshold; if the duration of the high-temperature state is greater than the preset duration threshold, then determine a second target correspondence relationship from multiple sixth correspondence relationships according to the target color, and determine the first dimming compensation data according to the second target correspondence relationship and the current temperature value of the target light-emitting unit, where the current temperature value is determined according to the first dimming cumulative data of the target color.

[0304] In the embodiments of the present invention, multiple sixth corresponding relationships are set according to the color types and quantities of the light-emitting units, and the multiple sixth corresponding relationships are respectively used to characterize the corresponding relationships between the temperature values of the light-emitting units of different colors and the dimming compensation data. For example, assuming that the color backlight unit is an RGB three-color backlight unit, 3 sixth corresponding relationships are set, namely the sixth corresponding relationship of the R color, the sixth corresponding relationship of the G color, and the sixth corresponding relationship of the B color.

[0305] In a specific implementation, if the current temperature state is predicted based on the first dimming cumulative data of the R color, the display chip will use the sixth corresponding relationship of the R color as the second target corresponding relationship, and based on the current temperature value of the target light-emitting unit, determine the dimming compensation data corresponding to the current temperature value in the second target corresponding relationship, and use the determined dimming compensation data as the first dimming compensation data. The same process is performed for each color respectively to obtain the first dimming compensation data corresponding to the light-emitting units of each color.

[0306] In addition, if the duration of maintaining the high-temperature state is less than or equal to the preset duration threshold, the display chip will directly use the dimming data corresponding to the target output channel in the current image frame as the target dimming data. That is, the dimming data remains unchanged.

[0307] In the above embodiments, in the color backlight unit architecture, for the light-emitting units of a certain color (i.e., the target color), the second target corresponding relationship corresponding to this color is used to determine the first dimming compensation data of the target light-emitting unit, and the dimming data corresponding to the target light-emitting unit is compensated using the first dimming compensation data. Since there are different sixth corresponding relationships for different colors of the light-emitting units, and accordingly, the first dimming compensation data used by the light-emitting units of the corresponding colors during the high-temperature compensation process is extracted, and the targeted compensation is performed using this first dimming compensation data, which avoids the occurrence of the white balance collapse problem caused by different brightness reduction amounts of the light-emitting units of different colors as the temperature increases, ensures the image display effect of the display device, and improves the performance of the display device.

[0308] In some embodiments, after the display chip obtains the first dimming compensation data corresponding to each output channel, it uses this first dimming compensation data to reduce the dimming data corresponding to the corresponding output channel in the current image frame to obtain the target dimming data, and uses the target dimming data to control the brightness of the corresponding light-emitting units.

[0309] It should be noted that when performing temperature compensation on the dimming data corresponding to the corresponding output channel in the current image frame, the specific compensation method can refer to the implementation method of the corresponding embodiment of step S502-2, which will not be elaborated here.

[0310] In some embodiments, after obtaining the target dimming data, the display chip further accumulates the target dimming data and the first cumulative dimming data, and updates the first cumulative dimming data according to the accumulation result.

[0311] Figure 10 FIG. shows a schematic diagram of a complete workflow for temperature compensation of a color backlight unit provided by an embodiment of the present invention. As Figure 10 shown, it may include the following steps:

[0312] Step S1001: Accumulate the dimming data corresponding to each color output channel in multiple color output channels of each color to obtain the first cumulative dimming data of each color;

[0313] Step S1002: For the first cumulative dimming data corresponding to any color, determine the current temperature state of the light emitting units connected to the color output channels of this color in each dimmer respectively according to the fifth corresponding relationship corresponding to this color and the first cumulative dimming data corresponding to this color;

[0314] Step S1003: If the current temperature state is a high temperature state, determine whether the duration of maintaining the high temperature state is greater than a preset duration threshold. If so, execute step S1004; otherwise, execute step S1006;

[0315] Step S1004: For the current temperature state of the light emitting units corresponding to any color, determine the first dimming compensation data corresponding to the multiple light emitting units of this color based on the sixth corresponding relationship corresponding to this color and the current temperature values of the multiple light emitting units of this color;

[0316] Step S1005: For the first dimming compensation data corresponding to the light emitting units of any color, respectively reduce the dimming data corresponding to the color output channels of this color in the current image frame to obtain the target dimming data, and update the corresponding first cumulative dimming data with the target dimming data;

[0317] Step S1006: Use the dimming data corresponding to the color output channels of this color in the current image frame directly as the target dimming data, and update the corresponding first cumulative dimming data with the target dimming data.

[0318] Furthermore, in the color backlight unit structure, when performing the aging compensation operation of the light emitting units, similar to the above high temperature compensation, it also needs to be carried out by color, specifically as follows:

[0319] In some embodiments, in the color backlight unit architecture, during the process of accumulating the dimming data to obtain the second accumulated dimming data, the dimming data of each color is accumulated separately. Specifically, within the second time period, for each of the multiple color output channels corresponding to the same color, the dimming data corresponding to each color output channel is accumulated. Since the output channels are color output channels, one output channel is connected to the light-emitting unit of one color and receives the dimming data of one color. Therefore, by accumulating the dimming data corresponding to each output channel, the accumulation operation of the dimming data for each color can be achieved. At this time, the generated second accumulated dimming data is the accumulated dimming data for the corresponding color. In addition, its specific implementation manner is similar to the implementation manner of accumulating the first dimming data corresponding to step S501-1, and reference can be made to the implementation manner of the corresponding embodiment of step S501-1, so it will not be elaborated here.

[0320] In some embodiments, the second accumulated dimming data obtained in the color backlight unit architecture is the second accumulated dimming data of the target color; the current aging state of the target light-emitting unit can be determined specifically through the following method:

[0321] The display chip can determine the third target correspondence among multiple seventh correspondences according to the target color of the second accumulated dimming data, and determine the current aging state based on the third target correspondence and the second accumulated dimming data of the target color, where the multiple seventh correspondences are respectively used to represent the correspondence between the accumulated dimming data of different colors and the aging state of the light-emitting units of the corresponding colors.

[0322] For example, assuming that the color backlight unit is an RGB three-color backlight unit, then 3 seventh correspondences are set correspondingly, namely the seventh correspondence for the R color, the seventh correspondence for the G color, and the seventh correspondence for the B color.

[0323] In a specific implementation, if the second accumulated dimming data is the accumulated dimming data of the R color, the display chip will use the seventh correspondence of the R color as the third target correspondence, and determine the aging state corresponding to the second accumulated dimming data in the third target correspondence, and use the determined aging state as the current aging state of the target light-emitting unit. The same processing is performed for each color respectively to obtain the current aging state corresponding to each color's light-emitting unit.

[0324] In some embodiments, after obtaining the current aging state corresponding to each color's light-emitting unit, the display chip can determine the second dimming compensation data through the following method:

[0325] Determine a fourth target correspondence among multiple eighth correspondences according to the target color, and determine second dimming compensation data according to the fourth target correspondence and the current aging state; wherein, the multiple eighth correspondences are respectively used to represent the correspondence between the aging state of different color light-emitting units and the dimming compensation data.

[0326] For example, assuming that the color backlight unit is an RGB three-color backlight unit, 3 eighth correspondences are correspondingly set, namely the eighth correspondence of the R color, the eighth correspondence of the G color, and the eighth correspondence of the B color.

[0327] In a specific implementation, if the current temperature state is predicted based on the second dimming cumulative data of the R color, the display chip will use the eighth correspondence of the R color as the fourth target correspondence, and determine the dimming compensation data corresponding to the current aging state in the second target correspondence according to the current aging state of the target light-emitting unit, and use the determined dimming compensation data as the second dimming compensation data. The same processing is performed for each color respectively to obtain the second dimming compensation data corresponding to each color's light-emitting unit.

[0328] In some embodiments, after obtaining the second dimming compensation data, the display chip can use the first dimming compensation data and the second dimming compensation data to compensate the dimming data corresponding to the corresponding output channel in the current image frame to obtain target dimming data, and use the target dimming data to control the brightness of the corresponding light-emitting unit.

[0329] It should be noted that when using the first dimming compensation data and the second dimming compensation data to compensate the dimming data corresponding to the corresponding output channel in the current image frame, the specific compensation method can refer to the implementation method of the corresponding embodiment of step S804, which will not be elaborated here.

[0330] In some embodiments, after obtaining the target dimming data, the display chip will also perform an accumulation process on the target dimming data and the second dimming cumulative data, and update the second dimming cumulative data according to the accumulation result.

[0331] In the above embodiments, in the color backlight unit architecture, it is necessary to use the third target correspondence corresponding to the target color and the first cumulative data of the target color to predict the current aging state of the target light-emitting unit, and use the fourth target correspondence corresponding to the target color and the current aging state to determine the second dimming compensation data corresponding to the target light-emitting unit, so as to use the second dimming compensation data to compensate the dimming data corresponding to the target light-emitting unit in the current image frame, so that the reduced light-emitting brightness of different color light-emitting units due to their own aging is restored to normal, ensuring the HDR requirements of the display device and improving the display effect of the display device.

[0332] Figure 11Shows a schematic diagram of a complete workflow for aging compensation of a color backlight unit provided by an embodiment of the present invention. As Figure 11 shown, it may include the following steps:

[0333] Step S1101, for each of the multiple color output channels of each color, accumulate the dimming data corresponding to each color output channel to obtain the second accumulated dimming data of each color;

[0334] Step S1102, for the first accumulated dimming data corresponding to any color, based on the seventh correspondence relationship corresponding to that color and the second accumulated dimming data corresponding to that color, respectively determine the current aging state of the light-emitting units connected to the color output channels of that color in each dimmer;

[0335] Step S1103, for the current aging state of the light-emitting units corresponding to any color, based on the eighth correspondence relationship corresponding to that color and the current aging states of the multiple light-emitting units corresponding to that color, determine the second dimming compensation data corresponding to the multiple light-emitting units of that color;

[0336] Step S1104, for the first dimming compensation data and the second dimming compensation data corresponding to the light-emitting units of any color, respectively adjust the dimming data corresponding to the color output channels in the current image frame to obtain the target dimming data, and update the corresponding second accumulated dimming data using the target dimming data.

[0337] Based on the same concept, an embodiment of the present invention also provides a display chip. Since this display chip is the display chip in the backlight control method of the embodiment of the present invention, and the principle of this display chip to solve problems is similar to that of the backlight control method, the implementation of this display chip can refer to the implementation of the backlight control method, and the repeated parts will not be elaborated.

[0338] Figure 12 Shows a schematic diagram of the structure of a display chip provided by an embodiment of the present invention. As Figure 12 shown, the display chip 400 of the embodiment of the present invention may include:

[0339] A state prediction module 410, configured to determine the current temperature state of a target light-emitting unit according to the dimming data corresponding to a target output channel in multiple first image frames;

[0340] A compensation processing module 420, configured to determine target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, and control the backlight brightness of the target light-emitting unit according to the target dimming data;

[0341] Among them, the multiple first image frames are the multiple image frames that have been displayed within the first time period, the target output channel is any one of the multiple output channels of the dimmer, and the target light-emitting unit is the light-emitting unit correspondingly connected to the target output channel.

[0342] In some embodiments, the state prediction module 410 is specifically configured to:

[0343] Determine first dimming cumulative data according to the dimming data corresponding to the target output channel in the multiple first image frames;

[0344] Based on the first dimming cumulative data, determine the current temperature state of the target light-emitting unit.

[0345] In some embodiments, the state prediction module 410 is specifically configured to:

[0346] Based on the first correspondence and the first dimming cumulative data, determine the current temperature value of the target light-emitting unit, where the first correspondence is used to represent the correspondence between the dimming cumulative data and the temperature value;

[0347] Compare the preset temperature threshold with the current temperature value. If the current temperature value is greater than or equal to the preset temperature threshold, determine that the current temperature state is a high-temperature state;

[0348] If the current temperature value is less than the preset temperature threshold, determine that the current temperature state is a normal temperature state.

[0349] In some embodiments, the state prediction module 410 is specifically configured to:

[0350] Based on the first correspondence and the first dimming cumulative data, determine the current temperature state of the target light-emitting unit;

[0351] Among them, the first correspondence is used to represent the correspondence between the dimming cumulative data and the temperature state, and the temperature state at least includes a normal temperature state and a high-temperature state.

[0352] In some embodiments, one image frame corresponds to multiple dimming data, and one dimming data is used to control the light-emitting unit connected to one output channel of the dimmer;

[0353] The state prediction module 410 is specifically configured to:

[0354] Perform an accumulation process on the dimming data corresponding to the target output channel in the multiple first image frames to obtain first dimming cumulative data;

[0355] Among them, the start time of the first time period is not earlier than the power-on time of the display device, and the end time of the first time period is not later than the power-off time of the display device.

[0356] In some embodiments, the dimming data includes current data and PWM data, and the first dimming cumulative data includes first current cumulative data and / or first PWM cumulative data;

[0357] The state prediction module 410 is specifically configured to:

[0358] Accumulate the current data in the dimming data corresponding to the target output channel to obtain first current cumulative data,

[0359] and / or, accumulate the PWM data in the dimming data corresponding to the target output channel to obtain first PWM cumulative data.

[0360] In some embodiments, the compensation processing module 420 is specifically configured to:

[0361] When it is determined that the current temperature state is a normal temperature state, use the dimming data corresponding to the target output channel in the current image frame as the target dimming data;

[0362] When it is determined that the current temperature state is a high temperature state, based on the high temperature state, determine first dimming compensation data corresponding to the target unit, and adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain the target dimming data.

[0363] In some embodiments, the compensation processing module 420 is specifically configured to:

[0364] Compare a preset duration threshold with the duration of the high temperature state;

[0365] When it is determined that the duration of the high temperature state is greater than the preset duration threshold, determine first dimming compensation data according to a second correspondence relationship and the current temperature value of the target light-emitting unit;

[0366] Wherein, the second correspondence relationship is used to represent the correspondence relationship between the temperature value and the dimming compensation data.

[0367] In some embodiments, the compensation processing module 420 is further configured to:

[0368] When the duration of the high temperature state is less than or equal to the preset duration threshold, use the dimming data corresponding to the target output channel in the current image frame as the target dimming data.

[0369] In some embodiments, the compensation processing module 420 is specifically configured to:

[0370] Use the first dimming compensation data to reduce the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data;

[0371] Among them, the first dimming compensation data is generated when the duration of maintaining the high-temperature state is greater than a preset duration threshold.

[0372] In some embodiments, the state prediction module 410 is further configured to: determine the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple second image frames, where the multiple second image frames are multiple image frames displayed within a second time period;

[0373] The compensation processing module 420 is further configured to: determine the target dimming data based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame.

[0374] In some embodiments, the state prediction module 410 is specifically configured to:

[0375] Determine the second dimming cumulative data according to the dimming data corresponding to the target output channel in multiple second image frames, where the starting moment of the second time period is the moment of the first power-on of the display device;

[0376] Determine the current aging state of the target light-emitting unit based on the second dimming cumulative data.

[0377] In some embodiments, the state prediction module 410 is specifically configured to:

[0378] Determine the current aging state based on the third correspondence relationship and the second dimming cumulative data, where the third correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the aging state of the light-emitting unit.

[0379] In some embodiments, the compensation processing module 420 is specifically configured to:

[0380] Determine the first dimming compensation data corresponding to the target unit based on the current temperature state, and determine the second dimming compensation data corresponding to the target unit based on the current aging state;

[0381] Adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data and the second dimming compensation data to obtain the target dimming data.

[0382] In some embodiments, the compensation processing module 420 is specifically configured to:

[0383] Determine the second dimming compensation data according to the fourth correspondence relationship and the current aging state, where the fourth correspondence relationship is used to represent the correspondence relationship between the aging state of the light-emitting unit and the dimming compensation data.

[0384] In some embodiments, the multiple output channels of the dimmer are color output channels, the first dimming cumulative data is the first dimming cumulative data of the target color, and the target color is the emission color of the target light-emitting unit correspondingly connected to the target output channel;

[0385] The state prediction module 410 is specifically configured to:

[0386] Determine a first target correspondence relationship among multiple fifth correspondence relationships according to the target color, and determine the current temperature state of the target light-emitting unit based on the first target correspondence relationship and the first dimming cumulative data of the target color;

[0387] Wherein, the multiple fifth correspondence relationships are respectively used to represent the correspondence relationships between the dimming cumulative data of different colors and the temperature states, and the temperature states at least include a high-temperature state and a normal temperature state.

[0388] In some embodiments, the compensation processing module 420 is specifically configured to:

[0389] Compare the duration of maintaining the high-temperature state with a preset duration threshold;

[0390] When it is determined that the duration of maintaining the high-temperature state is greater than the preset duration threshold, determine a second target correspondence relationship among multiple sixth correspondence relationships according to the target color, and determine first dimming compensation data according to the second target correspondence relationship and the current temperature value of the target light-emitting unit;

[0391] Wherein, the multiple sixth correspondence relationships are respectively used to represent the correspondence relationships between the temperature values of different color light-emitting units and the dimming compensation data, and the current temperature value is determined according to the first dimming cumulative data of the target color.

[0392] In some embodiments, the multiple output channels of the dimmer are color output channels, the second dimming cumulative data is the second dimming cumulative data of the target color, and the target color is the emission color of the target light-emitting unit correspondingly connected to the target output channel;

[0393] The state prediction module 410 is specifically configured to:

[0394] Determine the current aging state of the target light-emitting unit based on the second dimming cumulative data, and determine second dimming compensation data based on the current aging state, including:

[0395] Determine a third target correspondence relationship among multiple seventh correspondence relationships according to the target color, and determine the current aging state based on the third target correspondence relationship and the second dimming cumulative data of the target color;

[0396] Wherein, the multiple seventh correspondence relationships are respectively used to represent the correspondence relationships between the dimming cumulative data of different colors and the aging states of the corresponding color light-emitting units;

[0397] The compensation processing module 420 is specifically configured to:

[0398] Determine a fourth target correspondence relationship from multiple eighth correspondence relationships according to the target color, and determine second dimming compensation data according to the fourth target correspondence relationship and the current aging state;

[0399] Among them, the multiple eighth correspondence relationships are respectively used to represent the correspondence relationships between the aging states of different color light-emitting units and the dimming compensation data.

[0400] Based on the same concept, an embodiment of the present invention further provides a backlight module. The principle of the backlight module to solve problems is similar to that of the foregoing display chip. Therefore, the implementation of the backlight module can refer to the implementation of the foregoing display chip, and the repeated parts will not be described again.

[0401] The backlight module provided by the embodiment of the present invention may include multiple light-emitting units and the display chip provided in any of the foregoing embodiments, wherein:

[0402] The display chip is electrically connected to the multiple light-emitting units;

[0403] The light-emitting unit is used to turn on the backlight according to the target dimming data received by itself.

[0404] Among them, the display chip in the embodiment of the present invention may adopt chips such as SoC, TCON, MCU, dimming controller, dimming device, etc., which can be flexibly adjusted according to the actual design architecture of the display device. The embodiment of the present invention does not make any restrictions on this.

[0405] In specific implementation, in the embodiment of the present invention, other essential components of the backlight module should be understood by those of ordinary skill in the art and will not be described here, nor should it be regarded as a limitation to the present invention.

[0406] In specific implementation, in the embodiment of the present invention, other essential components of the backlight control module should be understood by those of ordinary skill in the art and will not be described here, nor should it be regarded as a limitation to the present invention.

[0407] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0408] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A backlight control method, characterized in that, Including: Determine the current temperature state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple first image frames; Based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, determine the target dimming data, and control the backlight brightness of the target light-emitting unit according to the target dimming data; Wherein, the multiple first image frames are multiple image frames displayed within a first time period, the target output channel is any one of multiple output channels of the dimmer, and the target light-emitting unit is a light-emitting unit connected to the target output channel.

2. The method according to claim 1, characterized in that The determining the current temperature state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple first image frames includes: Determine the first dimming cumulative data according to the dimming data corresponding to the target output channel in the multiple first image frames; Based on the first dimming cumulative data, determine the current temperature state of the target light-emitting unit.

3. The method according to claim 2, wherein The determining the current temperature state of the target light-emitting unit based on the first dimming cumulative data includes: Based on a first correspondence relationship and the first dimming cumulative data, determine the current temperature value of the target light-emitting unit, wherein the first correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the temperature value; Compare a preset temperature threshold with the current temperature value. If the current temperature value is greater than or equal to the preset temperature threshold, determine that the current temperature state is a high-temperature state; If the current temperature value is less than the preset temperature threshold, determine that the current temperature state is a normal temperature state.

4. The method according to claim 2, wherein The determining the current temperature state of the target light-emitting unit based on the first dimming cumulative data includes: Based on a first correspondence relationship and the first dimming cumulative data, determine the current temperature state of the target light-emitting unit; Wherein, the first correspondence relationship is used to represent the correspondence relationship between the dimming cumulative data and the temperature state, and the temperature state at least includes a normal temperature state and a high-temperature state.

5. The method according to claim 2, wherein One image frame corresponds to multiple dimming data, and one dimming data is used to control a light-emitting unit connected to an output channel of the dimmer; The determining the first dimming cumulative data according to the dimming data corresponding to the target output channel in multiple first image frames includes: Perform an accumulation process on the dimming data corresponding to the target output channel in the multiple first image frames to obtain the first dimming cumulative data; Wherein, the start time of the first time period is not earlier than the power-on time of the display device, and the end time of the first time period is not later than the power-off time of the display device.

6. The method according to claim 5, characterized in that, The dimming data includes current data and pulse width modulation (PWM) data, and the first dimming cumulative data includes first current cumulative data and / or first PWM cumulative data; The performing an accumulation process on the dimming data corresponding to the target output channel in the multiple first image frames to obtain the dimming cumulative data includes: Perform an accumulation process on the current data in the dimming data corresponding to the target output channel to obtain the first current cumulative data, And / or, perform an accumulation process on the PWM data in the dimming data corresponding to the target output channel to obtain the first PWM cumulative data.

7. The method according to claim 2, wherein The determining the target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame includes: When it is determined that the current temperature state is a normal temperature state, use the dimming data corresponding to the target output channel in the current image frame as the target dimming data; When it is determined that the current temperature state is a high temperature state, based on the high temperature state, determine the first dimming compensation data corresponding to the target unit, and adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain the target dimming data.

8. The method according to claim 7, wherein The determining the first dimming compensation data corresponding to the target unit based on the high temperature state includes: Compare a preset duration threshold with the duration of the high temperature state; When it is determined that the duration of the high temperature state is greater than the preset duration threshold, determine the first dimming compensation data according to the second corresponding relationship and the current temperature value of the target light-emitting unit, wherein the second corresponding relationship is used to represent the corresponding relationship between the temperature value and the dimming compensation data, and the current temperature value is determined according to the first PWM cumulative data.

9. The method according to claim 8, wherein After comparing the preset duration threshold with the duration of the high temperature state, it further includes: When it is determined that the duration of the high temperature state is less than or equal to the preset time threshold, use the dimming data corresponding to the target output channel in the current image frame as the target dimming data.

10. The method according to claim 7, characterized in that The adjusting the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data to obtain the target dimming data includes: Use the first dimming compensation data to reduce the dimming data corresponding to the target output channel in the current image frame to obtain the target dimming data; wherein the first dimming compensation data is generated when the duration of the high temperature state is greater than the preset duration threshold.

11. The method according to any one of claims 1 to 10, characterized in that It further includes: Determine the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple second image frames, where the multiple second image frames are multiple image frames displayed within a second time period; Based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame, determine the target dimming data.

12. The method according to claim 11, wherein The determining the current aging state of the target light-emitting unit according to the dimming data corresponding to the target output channel in multiple second image frames includes: Determine second dimming cumulative data according to the dimming data corresponding to the target output channel in the multiple second image frames, where the start time of the second time period is the first power-on time of the display device; Based on the second dimming cumulative data, determine the current aging state of the target light-emitting unit.

13. The method according to claim 12, characterized in that, The determining the current aging state of the target light-emitting unit based on the second dimming cumulative data includes: Determine the current aging state based on the third correspondence relationship and the second dimming cumulative data, where the third correspondence relationship is used to characterize the correspondence relationship between the dimming cumulative data and the aging state of the light-emitting unit.

14. The method according to claim 12, wherein The determining of the target dimming data based on the current aging state, the current temperature state, and the dimming data corresponding to the target output channel in the current image frame includes: Determine the first dimming compensation data corresponding to the target unit based on the current temperature state, and determine the second dimming compensation data corresponding to the target unit based on the current aging state; Adjust the dimming data corresponding to the target output channel in the current image frame according to the first dimming compensation data and the second dimming compensation data to obtain the target dimming data.

15. The method according to claim 14, wherein The determining of the second dimming compensation data corresponding to the target unit based on the current aging state Determine the second dimming compensation data according to the fourth correspondence relationship and the current aging state, where the fourth correspondence relationship is used to characterize the correspondence relationship between the aging state of the light-emitting unit and the dimming compensation data.

16. The method according to any one of claims 7 to 10, characterized in that The multiple output channels of the dimmer are color output channels, the first dimming cumulative data is the first dimming cumulative data of the target color, and the target color is the emission color of the target light-emitting unit corresponding to the target output channel; The determining of the current temperature state of the target light-emitting unit based on the first dimming cumulative data includes: Determine the first target correspondence relationship among multiple fifth correspondence relationships according to the target color, and determine the current temperature state of the target light-emitting unit based on the first target correspondence relationship and the first dimming cumulative data of the target color; Among them, the multiple fifth correspondence relationships are respectively used to characterize the correspondence relationship between the dimming cumulative data of different colors and the temperature state, and the temperature state at least includes a high-temperature state and a normal temperature state; The determining of the first dimming compensation data corresponding to the target unit based on the high-temperature state includes: Compare the duration of the high-temperature state with a preset duration threshold; When it is determined that the duration of the high-temperature state is greater than the preset duration threshold, determine the second target correspondence relationship among multiple sixth correspondence relationships according to the target color, and determine the first dimming compensation data according to the second target correspondence relationship and the current temperature value of the target light-emitting unit; Among them, the multiple sixth correspondence relationships are respectively used to characterize the correspondence relationship between the temperature values of light-emitting units of different colors and the dimming compensation data, and the current temperature value is determined according to the first dimming cumulative data of the target color.

17. The method according to any one of claims 14 to 15, characterized in that The multiple output channels of the dimmer are color output channels, the second dimming cumulative data is the second dimming cumulative data of the target color, and the target color is the emission color of the target light-emitting unit corresponding to the target output channel; The determining of the current aging state of the target light-emitting unit based on the second dimming cumulative data includes: Determine a third target correspondence among a plurality of seventh correspondences according to the target color, and determine the current aging state based on the third target correspondence and the second dimming cumulative data of the target color; Wherein, the plurality of seventh correspondences are respectively used to represent the correspondence between the dimming cumulative data of different colors and the aging state of the corresponding color light-emitting units; The determining the second dimming compensation data corresponding to the target light-emitting unit based on the current aging state includes: Determine a fourth target correspondence among a plurality of eighth correspondences according to the target color, and determine the second dimming compensation data according to the fourth target correspondence and the current aging state; Wherein, the plurality of eighth correspondences are respectively used to represent the correspondence between the aging state of different color light-emitting units and the dimming compensation data.

18. A display chip, characterized in that, Including: A state prediction module, configured to determine the current temperature state of the target light-emitting unit according to the dimming data corresponding to the target output channel in a plurality of first image frames; A compensation processing module, configured to determine target dimming data based on the current temperature state and the dimming data corresponding to the target output channel in the current image frame, and control the backlight brightness of the target light-emitting unit according to the target dimming data; Wherein, the plurality of first image frames are a plurality of image frames displayed within a first time period, the target output channel is any one of the plurality of output channels of the dimmer, and the target light-emitting unit is a light-emitting unit correspondingly connected to the target output channel.

19. A backlight module, characterized in that, Including a plurality of light-emitting units and the display chip according to claim 18, wherein: The display chip is electrically connected to the plurality of light-emitting units; The light-emitting unit is configured to turn on the backlight according to the received target dimming data.

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