LCD backlight intelligent adjusting system and method based on multiple sensors

Abstract

The invention discloses an intelligent LCD backlight adjusting system and method based on multiple sensors, and relates to the technical field of LCD adjustment. The LCD backlight intelligent adjusting system and method based on the multiple sensors comprise a personnel approaching detection module used for carrying out first brightness adjustment, a light intensity sensor shielding judgment module used for carrying out second brightness adjustment, an LCD touch judgment module used for carrying out third brightness adjustment, and a light intensity sensor shielding judgment module used for carrying out second brightness adjustment. The system can automatically turn off or reduce the backlight brightness when no one uses the system, reduce the power consumption, prolong the service life of the screen, monitor the approaching and watching states of the user in real time, dynamically adjust the backlight brightness, ensure the clear and visible content, avoid visual fatigue, automatically adjust the backlight to adapt to changes, and adjust the brightness when judging the user interaction. Responsiveness and fluency are improved, personalized brightness setting is provided, and user experience is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of LCD adjustment, and in particular to a multi-sensor based LCD backlight intelligent adjustment system and method. Background Art

[0002] LCD is a flat display technology that uses the optoelectronic properties of liquid crystal materials to display images. Liquid crystal displays are widely used in various devices, including computer monitors, televisions, mobile phones, tablets, various instruments and meters, etc. Liquid crystal is a substance between liquid and solid, with the property of being able to adjust the way light passes through. The liquid crystal layer in a liquid crystal display is usually sandwiched between two transparent electrode glasses. LCD itself does not emit light, so a backlight source (usually LED) is required to illuminate the display content. The backlight shines on the liquid crystal layer, and the liquid crystal molecules change their arrangement under the action of the electric field, thereby adjusting the light passing through them.

[0003] Currently, the application of LCD in the market mainly has the following problems: the existing LCD backlight brightness adjustment method is single, which makes the screen content difficult to recognize or too dazzling, which not only affects the user experience, but also causes unnecessary energy waste and brings inconvenience to users. In addition, the automatic adjustment based on ambient light usually adopts a fixed linear method, which cannot meet the personalized needs of users. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an LCD backlight intelligent adjustment system and method based on multiple sensors, which solves the problems that fixed brightness cannot be adjusted, which easily causes energy waste, manual dimming is inconvenient to use, and automatic dimming is too dependent on light sensors, which is prone to misadjustment and cannot meet the personalized needs of users.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an LCD backlight intelligent adjustment system based on multiple sensors, including: a person approaching detection module, used to determine whether a person is approaching, and when a person is approaching, determine whether the person is watching the LCD, and perform a first brightness adjustment based on the results of whether the person is approaching and whether the person is watching the LCD, and the results of the first brightness adjustment include turning off the backlight brightness, adjusting the backlight brightness to the first reference brightness, and adjusting the backlight brightness to the second reference brightness; a light intensity sensor occlusion judgment module, used to determine whether the light intensity sensor is blocked when the backlight brightness is the second reference brightness, and obtain the light intensity sensor occlusion judgment result, and perform a second brightness adjustment based on the light intensity sensor occlusion judgment result; an LCD touch judgment module, used to determine whether the LCD within the waiting time threshold is touched after the second brightness adjustment, and obtain the LCD touch judgment result, and perform a third brightness adjustment based on the LCD touch judgment result.

[0006] Further, judging whether a person is approaching, and judging whether the person is watching the LCD when a person is approaching, includes the following steps: obtaining LCD external object data, comprehensively analyzing the LCD external object data to obtain an LCD external object evaluation value, and comparing the LCD external person evaluation value with a reference LCD external person boundary value stored in a database based on the LCD external object evaluation value; if the LCD external person evaluation value is equal to or greater than the reference LCD external person boundary value, then a person is approaching outside the LCD, and the person approach judgment result is recorded as a person approaching; if the LCD external person evaluation value is less than the reference LCD external person boundary value, then no person is approaching outside the LCD, and the person approach judgment result is recorded as no person is approaching; if the person approach judgment result is recorded as a person approaching, obtaining the eye position of the external person, and based on the person's eye position, obtaining the angle between the person's line of sight and the LCD screen; if the angle between the person's line of sight and the LCD falls within the line of sight angle range stored in the database, then the person is watching the LCD, and the watching LCD judgment result is recorded as the person is watching the LCD; if the angle between the person's line of sight and the LCD does not fall within the line of sight angle range stored in the database, then the person is not watching the LCD, and the watching LCD judgment result is recorded as the person is not watching the LCD.

[0007] Furthermore, the LCD external object data specifically includes the thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the shape of the external object; the LCD external personnel evaluation value is calculated as follows:

[0008]

[0009] Wherein: FS is the thermal radiation intensity of the external object surface, JL is the distance between the external object and the LCD, XZ1 is the shape of the external object, FS0 is the thermal radiation intensity of the reference person surface, JL0 is the reference distance between the external object and the LCD, XZ0 is the reference person shape, b1 is the weight factor of the absolute value of the difference between the thermal radiation intensity of the external object surface stored in the database and the thermal radiation intensity of the reference person surface, b2 is the weight factor of the ratio of the distance between the external object and the LCD stored in the database and the distance between the reference external object and the LCD, b3 is the weight factor of the similarity between the shape of the external object stored in the database and the reference person shape, B is the LCD external person evaluation value, and e is a natural constant.

[0010] Furthermore, the first brightness adjustment based on the result of the judgment of the approach of a person includes: if the result of the judgment of the approach of a person is recorded as no person approaching, the LCD backlight brightness is adjusted to the lowest brightness, and if the lowest brightness is maintained for longer than a waiting time threshold, the LCD backlight brightness is turned off; if the result of the judgment of the approach of a person is recorded as a person approaching, and the result of the judgment of viewing the LCD is recorded as a person viewing the LCD, the LCD backlight brightness is adjusted to a second reference brightness; if the result of the judgment of the approach of a person is recorded as a person approaching, and the result of the judgment of viewing the LCD is recorded as a person not viewing the LCD, the LCD backlight brightness is adjusted to a first reference brightness, and if the first reference brightness is maintained for longer than the waiting time threshold, the LCD backlight brightness is turned off.

[0011] Furthermore, determining whether the light intensity sensor is blocked and obtaining a result of the light intensity sensor blocking determination includes the following steps: obtaining the external light intensity of the light intensity sensor; if it is lower than a light intensity threshold stored in a database, the light intensity sensor is blocked, and the result of the light intensity sensor blocking determination is recorded as the light intensity sensor is blocked; if it is equal to or greater than the light intensity threshold stored in the database, the light intensity sensor is not blocked, and the result of the light intensity sensor blocking determination is recorded as the light intensity sensor is not blocked.

[0012] Further, the second brightness adjustment based on the light intensity sensor occlusion judgment result includes: when the light intensity sensor occlusion judgment result is recorded as the light intensity sensor being blocked, obtaining the current time, comparing the current time with each reference time period stored in the database, determining the reference time period in which the current time falls, recording the brightness corresponding to the reference time period as the backlight brightness corresponding to the current time, and if the backlight brightness corresponding to the current time is lower than the second reference brightness, maintaining the second reference brightness; when the light intensity sensor occlusion judgment result is recorded as the light intensity sensor not being blocked, obtaining the LCD light intensity sensor external data, performing a comprehensive analysis on the LCD light intensity sensor external data, and obtaining the LCD light intensity sensor external evaluation value; storing the LCD light intensity sensor external evaluation value as a designated tag, comparing the designated tag with the backlight brightness corresponding to each designated tag stored in the database, obtaining the backlight brightness corresponding to the designated tag represents the backlight brightness corresponding to the LCD light intensity sensor external evaluation value, and if the backlight brightness corresponding to the LCD light intensity sensor external evaluation value is lower than the second reference brightness, maintaining the second reference brightness.

[0013] Furthermore, the external data of the light intensity sensor specifically includes the angle between the direction of the person's sight and the LCD, the distance between the external object and the LCD, and the external light intensity of the LCD.

[0014] Further, determining whether the LCD is touched within the waiting time threshold and obtaining the LCD touch determination result includes the following steps: obtaining LCD touch data within the waiting time threshold, and performing a comprehensive analysis on the LCD touch data to obtain an LCD touch evaluation value; comparing the LCD touch evaluation value with a reference LCD touch limit value stored in a database; if the LCD touch evaluation value is equal to or greater than the reference LCD touch limit value, the LCD is touched within the waiting time threshold, and the LCD touch determination result is recorded as the LCD is touched; if the LCD touch evaluation value is less than the reference LCD touch limit value, the LCD is not touched within the waiting time threshold, and the LCD touch determination result is recorded as the LCD is not touched.

[0015] Furthermore, the LCD touch data specifically includes pressure values ​​of touch points on the LCD surface, temperatures of touch points on the LCD surface, and areas of touch points on the LCD surface; and the third brightness adjustment based on the LCD touch judgment result includes: if the LCD touch judgment result is recorded as the LCD being touched, maintaining the LCD backlight brightness at the brightness at the time of the second brightness adjustment; if the LCD touch judgment result is recorded as the LCD not being touched, adjusting the LCD backlight brightness to a minimum brightness, and if the minimum brightness exceeds a waiting time threshold, turning off the LCD backlight brightness.

[0016] The invention discloses a multi-sensor-based LCD backlight intelligent adjustment method, comprising: judging whether a person is approaching, and judging whether the person is watching the LCD when a person is approaching, and performing a first brightness adjustment according to the results of whether the person is approaching and whether the person is watching the LCD, wherein the results of the first brightness adjustment include turning off the backlight brightness, adjusting the backlight brightness to a first reference brightness, and adjusting the backlight brightness to a second reference brightness; a light intensity sensor occlusion judgment module, used for judging whether the light intensity sensor is blocked when the backlight brightness is a second reference brightness, and obtaining the light intensity sensor occlusion judgment result, and performing a second brightness adjustment according to the light intensity sensor occlusion judgment result; an LCD touch judgment module, used for judging whether the LCD is touched within a waiting time threshold after the second brightness adjustment, and obtaining the LCD touch judgment result, and performing a third brightness adjustment based on the LCD touch judgment result.

[0017] The present invention has the following beneficial effects:

[0018] (1) This multi-sensor based LCD backlight intelligent adjustment system and method uses sensors to determine whether the user is using the LCD screen. It can automatically turn off or reduce the backlight brightness when no one is using it, reducing power consumption and extending the screen life. It monitors the user's approach and viewing status in real time and dynamically adjusts the backlight brightness to ensure that the content is clearly visible and avoid visual fatigue. At the same time, it monitors the ambient light intensity and automatically adjusts the backlight to adapt to changes. It adjusts the brightness when determining user interaction to improve responsiveness and smoothness. In addition, it provides personalized brightness settings and combines multi-sensor data to achieve intelligent control and enhance user experience.

[0019] (2) The multi-sensor based LCD backlight intelligent adjustment system and method can dynamically adjust the brightness and contrast of the LCD according to the observer's line of sight, distance and external lighting conditions, thereby improving the user's visual experience. Understanding the external light intensity and object distance can help the system optimize the display effect under different environmental conditions, ensuring that users can clearly view the content under various lighting conditions. By comprehensively analyzing these parameters, the system can achieve more intelligent brightness adjustment and display optimization, thereby improving the intelligence level of the device.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the connection of the LCD backlight intelligent adjustment system modules based on multiple sensors of the present invention;

[0022] Figure 2 The present invention is a flow chart of the LCD backlight intelligent adjustment method based on multiple sensors.

[0023] Figure 3 The schematic diagram of the control system module of the LCD backlight intelligent adjustment method based on multiple sensors of the present invention. DETAILED DESCRIPTION

[0024] The embodiments of the present application are based on a multi-sensor LCD backlight intelligent adjustment system and method, which solve the problems of fixed brightness being unable to be adjusted, easily causing energy waste, manual dimming being inconvenient to use, and automatic dimming being overly dependent on light sensors, easily causing misadjustment, and being unable to meet the personalized needs of users.

[0025] See also Figure 1The embodiment of the present invention provides a technical solution: an LCD backlight intelligent adjustment system based on multiple sensors, including: a person approaching detection module, used to determine whether a person is approaching, and when a person is approaching, determine whether the person is watching the LCD, and perform a first brightness adjustment based on the results of whether the person is approaching and whether the person is watching the LCD. The results of the first brightness adjustment include turning off the backlight brightness, adjusting the backlight brightness to a first reference brightness, and adjusting the backlight brightness to a second reference brightness.

[0026] Specifically, Figure 3 As shown, the control system of the LCD backlight intelligent adjustment system based on multiple sensors includes a power interface, a power circuit, a communication interface, an MCU processing unit, multiple sensor interfaces and a backlight control interface, wherein the power interface is used to power the system, the communication interface is used to communicate with the host, the multiple sensor interfaces are used to connect various sensors, the backlight control interface is used to connect the backlight control board, the power circuit is used for power processing to power the backlight controller, the MCU processing unit and multiple sensors, and the MCU processing unit is used to algorithmically process the data of multiple sensors, and after processing, the backlight brightness is controlled through the backlight control interface.

[0027] Specifically, judging whether a person is approaching, and judging whether the person is watching the LCD when a person is approaching, includes the following steps: obtaining LCD external object data, comprehensively analyzing the LCD external object data to obtain an LCD external object evaluation value, and comparing the LCD external person evaluation value with a reference LCD external person boundary value stored in a database based on the LCD external object evaluation value; if the LCD external person evaluation value is equal to or greater than the reference LCD external person boundary value, then there is a person approaching outside the LCD, and the person approaching judgment result is recorded as a person approaching; if the LCD external person evaluation value is less than the reference LCD external person boundary value, then there is no person approaching outside the LCD, and the person approaching judgment result is recorded as no person approaching; if the person approaching judgment result is recorded as a person approaching, obtaining the eye position of the external person, and based on the person's eye position, obtaining the angle between the person's line of sight and the LCD screen; if the angle between the person's line of sight and the LCD falls within the line of sight angle range stored in the database, then the person is watching the LCD, and the watching LCD judgment result is recorded as the person is watching the LCD; if the angle between the person's line of sight and the LCD does not fall within the line of sight angle range stored in the database, then the person is not watching the LCD, and the watching LCD judgment result is recorded as the person is not watching the LCD.

[0028] In this embodiment, if a person approaches, a camera (such as an RGB camera or a depth camera) installed on the device is used to capture the observer's facial image, and computer vision technology is used to perform facial detection and eye positioning to determine the eye position, obtain the eye coordinates, determine the LCD center coordinates, use the center point of the LCD as a reference point for calculation, calculate the sight direction vector (the vector pointing from the eye position to the center of the LCD), calculate the modulus of the sight direction vector, convert the sight direction vector to a unit vector, and then calculate the unit vector of the sight direction vector, and finally calculate the sight direction vector and the LCD normal (indicating the direction of the LCD surface facing the observer). The angle between the eye and the LCD is calculated using the dot product formula of the vector to obtain the cosine function. The inverse cosine function can be used to calculate the angle between the person's line of sight and the LCD. The reference person's line of sight height, the reference LCD height, and the reference person-LCD distance are obtained. The line of sight angle is calculated using trigonometric functions. The angles from the eye to the bottom and top of the LCD screen need to be calculated separately. The inverse tangent function (arctan) is used to calculate the angle from the eye to the bottom of the LCD. Similarly, the inverse tangent function is used to calculate the angle from the eye to the top of the LCD. Finally, the difference between the top angle and the bottom angle is calculated, which is the reference line of sight angle range.

[0029] It should be explained that the system can monitor the changes in the surrounding environment in real time by acquiring the external object data of the LCD, so that the system can quickly respond to changes in external conditions. For example, when someone approaches, the system can immediately identify and respond accordingly. By judging whether the person is watching the LCD, the system can achieve a more intelligent interactive experience. For example, when the user approaches the LCD, the system can automatically light up the screen or display relevant information to attract the user's attention, which not only improves the user experience, but also increases the interaction between the user and the content and promotes the transmission of information. When no one approaches or watches the LCD, the system can automatically turn off or reduce the brightness of the LCD, which not only helps to reduce power consumption, but also extends the service life of the LCD and reduces maintenance costs. By comprehensively analyzing the external object data and the eye position of the person, the system can collect user behavior data. This data can be used to analyze the user's behavior patterns and provide data support for subsequent product improvements, marketing strategies and user experience optimization. For example, merchants can adjust the display brightness and content according to the customer's viewing, thereby improving sales conversion rates. According to the user's line of sight and behavior, the system can provide personalized content recommendations to increase user stickiness.

[0030] Specifically, the LCD external object data includes the thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the shape of the external object; the LCD external personnel evaluation value, which is calculated as follows:

[0031]

[0032] Wherein: FS is the thermal radiation intensity of the external object surface, JL is the distance between the external object and the LCD, XZ1 is the shape of the external object, FS0 is the thermal radiation intensity of the reference person surface, JL0 is the reference distance between the external object and the LCD, XZ0 is the reference person shape, b1 is the weight factor of the absolute value of the difference between the thermal radiation intensity of the external object surface stored in the database and the thermal radiation intensity of the reference person surface, b2 is the weight factor of the ratio of the distance between the external object and the LCD stored in the database and the distance between the reference external object and the LCD, b3 is the weight factor of the similarity between the shape of the external object stored in the database and the reference person shape, B is the LCD external person evaluation value, and e is a natural constant.

[0033] In this embodiment, the thermal radiation intensity of the surface of the external object refers to the thermal radiation energy emitted by the surface of the external object, which is usually expressed in temperature or radiation intensity (such as watts per square meter). This parameter can reflect the temperature state of the object. An infrared sensor or a thermal imaging camera can be used to measure the thermal radiation intensity of the surface of the object. The distance between the external object and the LCD refers to the physical distance between the external object and the LCD screen, which is usually measured in centimeters or meters. This parameter is crucial for determining whether the object is close to the LCD. An ultrasonic sensor, a laser rangefinder or an infrared rangefinder sensor can be used to measure the distance between the object and the LCD. The shape of the external object refers to the geometric shape and contour of the external object, which may affect its interaction method and visual effect with the LCD. A depth camera, a laser scanner or computer vision technology (such as an image processing algorithm) can be used to identify and analyze the shape of the object. The shape is represented by extracting the boundary points (contour points) of the shape, and a parameterized curve (such as a polynomial or a spline curve) is used to describe the boundary of the shape. The shape of the external object can be quantified. σ(XZ1, XZ0) is the similarity function between XZ1 and XZ0. The cosine similarity is used to calculate the similarity between the shape of the external object and the reference shape of the person.

[0034] It needs to be explained that there is a certain correlation between the above parameters. Among them, the thermal radiation intensity of the surface of the external object is negatively correlated with the distance between the external object and the LCD. The thermal radiation intensity of the surface of the external object usually decreases with the increase of the distance between the external object and the LCD. The distance between the external object and the LCD is related to the shape of the external object. The shape of the object may affect its distance from the LCD. For example, a larger object may block the LCD at a shorter distance, while a smaller object may still be visible at a farther distance. Therefore, shape information can help to more accurately determine the relative position of the object and the LCD. The thermal radiation intensity of the surface of the external object is related to the shape of the external object. Objects of different shapes may have different thermal radiation characteristics. For example, a flat surface may radiate heat more effectively, while an irregularly shaped object may cause uneven heat distribution. Therefore, shape information can help explain the change in thermal radiation intensity. By obtaining the data of external objects on the LCD to determine whether there is a person approaching, the user experience can be significantly improved, the brightness and content display of the LCD can be automatically adjusted, and the user's sense of participation can be enhanced. At the same time, the system can save energy when no one is approaching, extend the service life of the LCD, and reduce maintenance costs.

[0035] It should be explained that the evaluation value can more accurately determine whether the external object approaching is a person by comprehensively considering multiple factors such as the thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the shape of the external object. The accurate evaluation enables the system to make more reasonable responses in different environments to ensure that the user's needs are met in a timely manner. The calculation of the evaluation value takes into account the similarity between the external object and the person. The system can provide personalized content display based on this value, which not only improves the user's sense of participation, but also enhances the user's dependence on and satisfaction with the system. The set weight factors of the thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the shape of the external object are obtained from the database. Through the historically measured thermal radiation intensity of the external object surface, the distance between the external object and the LCD, the shape of the external object, and the evaluation value of the person outside the LCD, a mapping set of the thermal radiation intensity of the external object surface, the distance between the external object and the LCD, the shape of the external object, and their corresponding weight factors is established. The current thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the shape of the external object are input into the mapping set to obtain the current thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the weight factors corresponding to the shape of the external object.

[0036] Specifically, the first brightness adjustment based on the result of the person approach judgment includes: if the result of the person approach judgment is recorded as no person approaching, the LCD backlight brightness is adjusted to the lowest brightness, and if the lowest brightness is maintained for more than the waiting time threshold, the LCD backlight brightness is turned off; if the result of the person approach judgment is recorded as a person approaching, and the result of the viewing LCD judgment is recorded as a person viewing the LCD, the LCD backlight brightness is adjusted to the second reference brightness; if the result of the person approach judgment is recorded as a person approaching, and the result of the viewing LCD judgment is recorded as a person not viewing the LCD, the LCD backlight brightness is adjusted to the first reference brightness, and if the first reference brightness is maintained for more than the waiting time threshold, the LCD backlight brightness is turned off.

[0037] In this implementation, the second reference brightness is higher than the first reference brightness. By adjusting the LCD backlight brightness to the lowest brightness or turning it off, the system effectively reduces energy consumption when no one is approaching. This energy management strategy not only reduces power consumption, but also extends the service life of the LCD and reduces maintenance and replacement costs. When someone is approaching and watching the LCD, adjusting to the second reference brightness ensures the clarity and readability of the displayed content and improves the user's viewing experience. At the same time, when the user is not watching, maintaining the first reference brightness can avoid visual fatigue caused by excessive brightness and provide a more comfortable visual environment. It realizes automatic response based on user behavior and can intelligently adjust the brightness according to real-time environmental changes. Intelligent operation reduces the need for manual adjustment by the user, making the system more user-friendly and improving user convenience. By automatically turning off the LCD backlight when no one is approaching, the risk of screen heating and electrical failure is reduced, thereby improving the safety of the equipment.

[0038] The light intensity sensor blocking judgment module is used to judge whether the light intensity sensor is blocked when the backlight brightness is the second reference brightness, obtain the light intensity sensor blocking judgment result, and perform a second brightness adjustment according to the light intensity sensor blocking judgment result.

[0039] Specifically, the external light intensity of the light intensity sensor is obtained. If it is lower than the light intensity threshold stored in the database, the light intensity sensor is blocked, and the light intensity sensor blockage judgment result is recorded as the light intensity sensor is blocked; if it is equal to or greater than the light intensity threshold stored in the database, the light intensity sensor is not blocked, and the light intensity sensor blockage judgment result is recorded as the light intensity sensor is not blocked.

[0040] In this implementation scheme, by real-time monitoring of light intensity and comparing it with a preset threshold, the system can accurately determine whether the light intensity sensor is blocked. This reliable judgment mechanism ensures the normal operation of the light intensity sensor under various environmental conditions, reduces erroneous data collection caused by occlusion, and thus improves the overall reliability of the system. When the light intensity is lower than the threshold, the system can quickly identify the state of the light intensity sensor being blocked and take corresponding measures (such as adjusting the display brightness or issuing an alarm). This timely response capability enables the system to adapt to environmental changes and ensure that the user experience is not affected. By setting the light intensity threshold, the system can effectively filter out abnormal data caused by occlusion, ensuring that the data the system relies on for environmental monitoring and user interaction is reliable. By ensuring the normal operation of the light intensity sensor, the system can provide more accurate ambient light perception, thereby optimizing the brightness adjustment of the LCD, improving the user's viewing experience, and avoiding visual discomfort caused by light changes.

[0041] Specifically, the second brightness adjustment based on the light intensity sensor occlusion judgment result includes: when the light intensity sensor occlusion judgment result is recorded as the light intensity sensor being blocked, obtaining the current time, comparing the current time with each reference time period stored in the database, determining the reference time period in which the current time falls, recording the brightness corresponding to the reference time period as the backlight brightness corresponding to the current time, and if the backlight brightness corresponding to the current time is lower than the second reference brightness, maintaining the second reference brightness; when the light intensity sensor occlusion judgment result is recorded as the light intensity sensor not being blocked, obtaining the LCD light intensity sensor external data, performing a comprehensive analysis on the LCD light intensity sensor external data, and obtaining the LCD light intensity sensor external evaluation value; storing the LCD light intensity sensor external evaluation value as a designated tag, comparing the designated tag with the backlight brightness corresponding to each designated tag stored in the database, and obtaining the backlight brightness corresponding to the designated tag represents the backlight brightness corresponding to the LCD light intensity sensor external evaluation value, and if the backlight brightness corresponding to the LCD light intensity sensor external evaluation value is lower than the second reference brightness, maintaining the second reference brightness.

[0042] In this implementation, by acquiring the current time in real time and comparing it with the stored reference time period, the system can flexibly adjust the backlight brightness according to the lighting conditions of different time periods, ensuring that under different environmental and time conditions, the brightness of the LCD display is always maintained at an optimal level, thereby enhancing the user's visual experience. When the light intensity sensor is blocked, the system determines the backlight brightness through the reference time period to avoid erroneous brightness adjustments caused by blockage, ensuring that when the light intensity sensor cannot work normally, the system can still make reasonable brightness adjustments based on historical data, thereby ensuring the accuracy and reliability of the data.

[0043] It needs to be explained that when the light intensity sensor is not blocked, the system can accurately evaluate the current ambient lighting conditions by comprehensively analyzing the external light intensity data. This precise evaluation enables the LCD backlight brightness to better match the user's actual needs and avoids visual discomfort caused by light changes, thereby improving the user's overall experience. Automated processing reduces the user's need to manually adjust the brightness, and the system can self-adjust according to environmental changes. This automation capability allows users to focus more on the content itself without frequently adjusting device settings, thereby improving convenience of use.

[0044] Specifically, the external data of the light intensity sensor includes the angle between the direction of the person's sight and the LCD, the distance between the external object and the LCD, and the external light intensity of the LCD.

[0045] In this embodiment, the angle between the person's line of sight and the LCD represents the angle between the observer's line of sight and the surface of the LCD screen. The smaller the angle, the closer the observer's line of sight is to being perpendicular to the screen, which usually leads to a better visual experience. When there are multiple people outside, the viewing angle is determined based on the person closest to the center of the LCD. The position of the observer's head or eyes can be detected by using a camera or sensor (such as a gyroscope or accelerometer) to calculate the angle between the line of sight and the LCD. The distance between the external object and the LCD represents the distance between the object outside the LCD and the LCD. After determining that the approaching object is a person, it is the distance between the person and the LCD. The closer the distance, the greater the impact on the illumination and visibility of the LCD. An ultrasonic sensor, a laser rangefinder or an infrared sensor can be used to measure the actual distance between the observer and the LCD. The external light intensity of the LCD represents the light intensity of the environment surrounding the LCD, usually in lux. The external light intensity directly affects the visibility and brightness adjustment of the LCD. A light intensity sensor (such as a photoresistor or a photodiode) can be used to measure the light intensity around the LCD.

[0046] It should be explained that there is a certain correlation between the above parameters. Among them, the angle between the person's line of sight and the LCD and the external light intensity of the LCD. When the angle between the observer's line of sight and the LCD is large, it may cause increased reflection and glare, thereby affecting the visibility of the LCD. In this case, the change in external light intensity may have a greater impact on the user's visual experience. The closer the distance between the external object and the LCD is, the more likely it is to cause occlusion or reflection, thereby affecting the external light intensity of the LCD. If the object is close to the LCD, it may block the light, resulting in a decrease in the visibility of the LCD. The angle between the person's line of sight and the LCD and the angle between the external object and the LCD The distance between the observer and the LCD will also affect the calculation of the sight angle. The closer the distance, the smaller the angle may be, and vice versa. Real-time acquisition of these parameters can dynamically adjust the brightness and contrast of the LCD according to the observer's sight direction, distance and external lighting conditions, thereby improving the user's visual experience. Understanding the external light intensity and object spacing can help the system optimize the display effect under different environmental conditions, ensuring that users can clearly view the content under various lighting conditions. By comprehensively analyzing these parameters, the system can achieve more intelligent brightness adjustment and display optimization, and improve the intelligence level of the device. According to the external light intensity and the observer's sight direction, the system can reduce the backlight brightness when there is sufficient light, thereby saving energy.

[0047] What needs to be explained is that the external evaluation value of the LCD light intensity sensor is calculated as follows:

[0048]

[0049] Where: JJ is the angle between the person's line of sight and the LCD, JL is the distance between the external object and the LCD, QD is the external light intensity of the LCD, c1 is the weight factor of the angle between the person's line of sight and the LCD stored in the database, c2 is the weight factor of the distance between the external object and the LCD stored in the database, c3 is the weight factor of the external light intensity of the LCD stored in the database, and C is the external evaluation value of the LCD light intensity sensor.

[0050] In this implementation scheme, a systematic data analysis method is formed by integrating multiple variables to evaluate the light intensity of the LCD. The angle between the person's line of sight and the LCD is considered to reflect the influence of the user's viewing angle on the light intensity. Different viewing angles will cause changes in light reflection and refraction, thereby affecting the visibility of the LCD. The distance between external objects and the LCD affects the propagation and interference of light. Closer objects may block or reflect light, affecting the brightness of the LCD. The light intensity outside the LCD directly affects the display effect. Especially in a strong light environment, the readability of the LCD may decrease. By combining these factors, the light intensity of the LCD can be more comprehensively evaluated, the scientific nature of the evaluation is enhanced, and the actual situation can be more accurately reflected. By calculating the evaluation value in real time, the system can automatically adjust the brightness of the LCD according to environmental changes. It helps to improve user satisfaction with LCD display effects. The set angle between the person's line of sight and the LCD, the distance between the external object and the LCD, and the weight factors of the LCD's external light intensity are obtained from a database. Through the historically measured angle between the person's line of sight and the LCD, the distance between the external object and the LCD, the LCD's external light intensity, and the external evaluation value of the LCD light intensity sensor, a mapping set of the angle between the person's line of sight and the LCD, the distance between the external object and the LCD, the LCD's external light intensity, and their corresponding weight factors is established. The current angle between the person's line of sight and the LCD, the distance between the external object and the LCD, and the LCD's external light intensity are input into the mapping set to obtain the current angle between the person's line of sight and the LCD, the distance between the external object and the LCD, and the LCD's external light intensity corresponding to the weight factors.

[0051] The LCD touch judgment module is used to judge whether the LCD within the waiting time threshold is touched after the second brightness adjustment, and obtain the LCD touch judgment result, and perform the third brightness adjustment based on the LCD touch judgment result.

[0052] Specifically, determining whether an LCD is touched within a waiting time threshold and obtaining an LCD touch determination result include the following steps: obtaining LCD touch data within the waiting time threshold, and performing a comprehensive analysis on the LCD touch data to obtain an LCD touch evaluation value; comparing the LCD touch evaluation value with a reference LCD touch limit value stored in a database; if the LCD touch evaluation value is equal to or greater than the reference LCD touch limit value, the LCD is touched within the waiting time threshold, and the LCD touch determination result is recorded as the LCD is touched; if the LCD touch evaluation value is less than the reference LCD touch limit value, the LCD is not touched within the waiting time threshold, and the LCD touch determination result is recorded as the LCD is not touched.

[0053] In this embodiment, the use of this LCD requires touch operation. In the application of LCD touch screen, when a person is close to the LCD and watching, if the LCD is not touched for a long time, it means that the person may not want to continue watching. If the LCD is touched, it means that the person continues to watch. By judging whether the LCD is touched, the brightness of the LCD can be adjusted when it is not touched, saving energy consumption. By comprehensively analyzing the LCD touch data and calculating the evaluation value, the system can effectively distinguish between valid touches and invalid touches. For example, the system can set an evaluation value threshold. Only when the evaluation value of the touch data reaches or exceeds the threshold will it be judged as a valid touch, reducing the occurrence of false touches and ensuring that every effective operation of the user can be accurately identified, thereby improving the reliability of the device. By setting a waiting time threshold, the system can reduce the frequency of data collection when no touch event occurs, thereby reducing the burden on the processor and battery consumption. For example, the system can not collect touch data for a period of time, and only activate data analysis when the user touches the screen, which not only extends the use time of the device, but also improves the overall efficiency of the system.

[0054] Specifically, the LCD touch data includes the pressure value of the touch point on the LCD surface, the temperature of the touch point on the LCD surface, and the area of ​​the touch point on the LCD surface; based on the LCD touch judgment result, a third brightness adjustment is performed, including: if the LCD touch judgment result is recorded as the LCD being touched, the LCD backlight brightness is maintained at the brightness at the second brightness adjustment; if the LCD touch judgment result is recorded as the LCD not being touched, the LCD backlight brightness is adjusted to the lowest brightness, and if the lowest brightness exceeds the waiting time threshold, the LCD backlight brightness is turned off.

[0055] In this embodiment, the pressure value of the touch point on the LCD surface refers to the magnitude of the force applied by the user when touching the LCD screen, which is usually expressed as a force per unit area (such as Newton / square centimeter). It reflects the strength of the user's touch and can be obtained through a pressure sensor (such as a resistive or capacitive sensor). The resistive sensor determines the pressure by measuring the change in resistance of the touch point, while the capacitive sensor senses the pressure through the change in capacitance. The temperature of the touch point on the LCD surface refers to the temperature of the touch point when the user touches the LCD screen, which can reflect the influence of the user's body temperature and the ambient temperature on the touch. The temperature sensor (such as a thermocouple or thermistor) can be used to measure the temperature of the touch point. These sensors can be integrated on the surface or around the touch screen to monitor the temperature change of the touch point in real time. The touch point area on the LCD surface refers to the surface area of ​​the screen where the finger or other touch tool contacts the screen when the user touches the LCD screen, which is usually expressed in square millimeters (mm 2 ) indicates that it can be calculated by the resolution of the touch sensor and the shape of the touch point.

[0056] It should be explained that there is often a certain correlation between the above parameters. Among them, the pressure value of the touch point on the LCD surface is negatively correlated with the area of ​​the touch point on the LCD surface. Generally speaking, the pressure applied to a smaller area will be greater, while the pressure applied to a larger area will be relatively smaller. Therefore, the pressure value and area can be used together to determine the nature of the touch. For example, a light touch may have a larger area but smaller pressure, while a heavy touch may have a smaller area but larger pressure. The pressure value of the touch point on the LCD surface is negatively correlated with the temperature of the touch point on the LCD surface. The temperature of the touch point may affect the measurement of the pressure value. For example, a higher temperature may cause the skin to soften, thereby affecting the pressure applied. Pressure, LCD surface touch point temperature and LCD surface touch point area. The area of ​​the touch point may be related to temperature. A larger contact area may lead to faster heat transfer, which affects the temperature of the touch point. In addition, the user's body temperature may also vary depending on the touch area. By analyzing pressure, temperature and area, we can better understand the user's touch behavior and optimize the touch screen's response. Combining these parameters can improve the accuracy of touch recognition. For example, the system can determine whether the user is performing effective touch operations through a combination of pressure and area to reduce the occurrence of false touches. Collecting data on these parameters can provide a basis for subsequent analysis and optimization. Developers can improve product design and functionality by analyzing user touch behavior and identifying common usage patterns.

[0057] It needs to be explained that the backlight is one of the most power-consuming parts of the LCD display, especially under high brightness settings. By monitoring the touch status in real time, when the LCD is not touched, the system can automatically reduce the brightness when the user is not interacting, thereby reducing battery consumption. When the LCD is touched, maintaining the second baseline brightness can ensure that the user has a good visual experience when interacting. Too low brightness may make the screen content difficult to recognize and affect the user's operation fluency. This logic realizes automatic brightness adjustment through light intensity sensors and touch judgment systems. It can dynamically change according to the user's actual usage, avoiding the trouble of manual adjustment by the user. Reducing the brightness when the LCD is not touched, especially in dimly lit environments, can effectively reduce screen stimulation to the eyes and reduce visual fatigue. Adjusting the LCD backlight brightness to the minimum and turning off the backlight after reaching the waiting time threshold can reduce the working time of the backlight component, reduce heat and wear, thereby extending the service life of the LCD and reducing maintenance and replacement costs.

[0058] It needs to be explained that the calculation formula of LCD touch evaluation value is:

[0059]

[0060] Wherein: YL1 is the touch point pressure value on the LCD surface, WD1 is the touch point temperature on the LCD surface, MJ1 is the touch point area on the LCD surface, YL0 is the reference optimal touch point pressure value on the LCD surface, WD0 is the reference touch point temperature on the LCD surface, MJ0 is the reference touch point area on the LCD surface, d1 is the weight factor of the absolute value of the difference between the touch point pressure value on the LCD surface stored in the database and the reference optimal touch point pressure value on the LCD surface, d2 is the weight factor of the absolute value of the difference between the touch point temperature on the LCD surface stored in the database and the reference touch point temperature on the LCD surface, d3 is the weight factor of the absolute value of the difference between the touch point area on the LCD surface stored in the database and the touch point area on the LCD surface, and D is the LCD touch evaluation value.

[0061] It should be explained that the formula comprehensively considers three key factors: pressure, temperature and area of ​​the touch point. Through quantitative analysis of these factors, the system can more accurately judge the user's touch behavior. Through accurate evaluation, the system can effectively distinguish between valid touch and false touch, thereby reducing misoperation and improving user operation efficiency. By calculating the touch evaluation value in real time, the device can dynamically adjust its response according to the user's touch habits and environmental conditions. For example, in a high temperature environment, the user's fingers may sweat, resulting in changes in touch pressure and temperature. The system can adjust the touch sensitivity according to these changes to ensure that the user can get a good touch experience in different environments. The set LCD surface touch point The weight factors of the pressure value, the LCD surface touch point temperature, and the LCD surface touch point area are obtained from a database. A mapping set of the LCD surface touch point pressure value, the LCD surface touch point temperature, the LCD surface touch point area, and the LCD touch evaluation value are established through historical measurements. The current LCD surface touch point pressure value, the LCD surface touch point temperature, and the LCD surface touch point area are input into the mapping set to obtain the current LCD surface touch point pressure value, the LCD surface touch point temperature, and the LCD surface touch point area weight factors.

[0062] LCD backlight intelligent adjustment method based on multiple sensors, such as Figure 2As shown, it includes: judging whether a person is approaching, and when a person is approaching, judging whether the person is watching the LCD, and performing a first brightness adjustment based on the results of whether the person is approaching and whether the person is watching the LCD, the results of the first brightness adjustment include turning off the backlight brightness, adjusting the backlight brightness to the first reference brightness, and adjusting the backlight brightness to the second reference brightness; when the backlight brightness is the second reference brightness, judging whether the light intensity sensor is blocked, and obtaining the light intensity sensor blocking judgment result, and performing a second brightness adjustment based on the light intensity sensor blocking judgment result; after the second brightness adjustment, judging whether the LCD within the waiting time threshold is touched, and obtaining the LCD touch judgment result, and performing a third brightness adjustment based on the LCD touch judgment result.

[0063] In summary, the present application has at least the following effects: the multi-sensor based LCD backlight intelligent adjustment system and method, through sensors to determine whether the user is using the LCD screen, can automatically turn off or reduce the backlight brightness when no one is using it, reduce power consumption and extend screen life, monitor the user's approach and viewing status in real time, dynamically adjust the backlight brightness, ensure that the content is clearly visible, and avoid visual fatigue. At the same time, it monitors the ambient light intensity, automatically adjusts the backlight to adapt to changes, and adjusts the brightness when judging user interaction to improve responsiveness and smoothness. In addition, it provides personalized brightness settings, combines multi-sensor data to achieve intelligent control, and enhances user experience.

[0064] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0065] The present invention is described with reference to flowcharts and / or block diagrams of systems, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0068] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0069] 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 equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. LCD backlight intelligent adjustment system based on multiple sensors, characterized in that: include: A person approaching detection module is used to determine whether a person is approaching, and when a person is approaching, determine whether the person is watching the LCD, and perform a first brightness adjustment based on the results of whether the person is approaching and whether the person is watching the LCD. The results of the first brightness adjustment include turning off the backlight brightness, adjusting the backlight brightness to a first reference brightness, and adjusting the backlight brightness to a second reference brightness; A light intensity sensor shielding judgment module is used to judge whether the light intensity sensor is shielded when the backlight brightness is the second reference brightness, obtain the light intensity sensor shielding judgment result, and perform a second brightness adjustment according to the light intensity sensor shielding judgment result; The LCD touch judgment module is used to judge whether the LCD within the waiting time threshold is touched after the second brightness adjustment, and obtain the LCD touch judgment result, and perform the third brightness adjustment based on the LCD touch judgment result.

2. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 1, characterized in that: Determining whether a person is approaching, and if a person is approaching, determining whether the person is viewing the LCD, includes the following steps: Obtaining LCD external object data, performing comprehensive analysis on the LCD external object data to obtain an LCD external object evaluation value, and comparing the LCD external personnel evaluation value with a reference LCD external personnel definition value stored in a database based on the LCD external object evaluation value; If the LCD external personnel evaluation value is equal to or greater than the reference LCD external personnel definition value, there is a person approaching the outside of the LCD, and the person approaching judgment result is recorded as a person approaching; If the LCD external personnel evaluation value is less than the reference LCD external personnel limit value, there is no person approaching the LCD, and the person approaching judgment result is recorded as no person approaching; If the result of the person approaching judgment is recorded as a person approaching, the eye position of the external person is obtained, and based on the eye position of the person, the angle between the person's sight direction and the LCD screen is obtained; If the angle between the person's sight direction and the LCD falls within the sight angle range stored in the database, the person is looking at the LCD, and the judgment result of watching the LCD is recorded as the person is watching the LCD; If the angle between the person's sight direction and the LCD does not fall within the sight angle range stored in the database, the person is not looking at the LCD, and the LCD viewing judgment result is recorded as the person is not looking at the LCD.

3. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 2 is characterized in that: The LCD external object data specifically includes the thermal radiation intensity of the external object surface, the distance between the external object and the LCD, and the shape of the external object; The LCD external personnel evaluation value is calculated as follows: Wherein: FS is the thermal radiation intensity of the external object surface, JL is the distance between the external object and the LCD, XZ1 is the shape of the external object, FS0 is the thermal radiation intensity of the reference person surface, JL0 is the reference distance between the external object and the LCD, XZ0 is the reference person shape, b1 is the weight factor of the absolute value of the difference between the thermal radiation intensity of the external object surface stored in the database and the thermal radiation intensity of the reference person surface, b2 is the weight factor of the ratio of the distance between the external object and the LCD stored in the database and the distance between the reference external object and the LCD, b3 is the weight factor of the similarity between the shape of the external object stored in the database and the reference person shape, B is the LCD external person evaluation value, and e is a natural constant.

4. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 3 is characterized in that: The first brightness adjustment based on the result of the person approaching judgment includes: If the result of the person approaching judgment is recorded as no person approaching, the LCD backlight brightness is adjusted to the lowest brightness. If the lowest brightness is maintained for a time exceeding the waiting time threshold, the LCD backlight brightness is turned off; If the result of the person approaching judgment is recorded as a person approaching, and the result of the person viewing the LCD judgment is recorded as a person viewing the LCD, the LCD backlight brightness is adjusted to the second reference brightness; If the result of the person approaching is recorded as a person approaching, and the result of the person watching the LCD is recorded as a person not watching the LCD, the LCD backlight brightness is adjusted to the first reference brightness. If the first reference brightness is maintained for longer than the waiting time threshold, the LCD backlight brightness is turned off.

5. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 1, characterized in that: Determining whether the light intensity sensor is blocked and obtaining the light intensity sensor blocking determination result includes the following steps: Obtaining the external light intensity of the light intensity sensor, if it is lower than the light intensity threshold stored in the database, the light intensity sensor is blocked, and the light intensity sensor blocking judgment result is recorded as the light intensity sensor is blocked; If it is equal to or greater than the light intensity threshold stored in the database, the light intensity sensor is not blocked, and the light intensity sensor blockage judgment result is recorded as the light intensity sensor is not blocked.

6. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 5 is characterized in that: The second brightness adjustment based on the light intensity sensor shading judgment result includes: When the light intensity sensor shielding judgment result is recorded as the light intensity sensor being shielded, the current time is obtained, the current time is compared with each reference time period stored in the database, the reference time period into which the current time falls is determined, the brightness corresponding to the reference time period is recorded as the backlight brightness corresponding to the current time, and if the backlight brightness corresponding to the current time is lower than the second reference brightness, the second reference brightness is maintained; When the light intensity sensor shielding judgment result is recorded as the light intensity sensor being not shielded, external data of the LCD light intensity sensor is obtained, and the external data of the LCD light intensity sensor is comprehensively analyzed to obtain an external evaluation value of the LCD light intensity sensor; The external evaluation value of the LCD light intensity sensor is stored as a designated label, and the designated label is compared with the backlight brightness corresponding to each designated label stored in the database, so that the backlight brightness corresponding to the designated label represents the backlight brightness corresponding to the external evaluation value of the LCD light intensity sensor. If the backlight brightness corresponding to the external evaluation value of the LCD light intensity sensor is lower than the second reference brightness, the second reference brightness is maintained.

7. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 6, characterized in that: The external data of the light intensity sensor specifically includes the angle between the direction of the person's sight and the LCD, the distance between the external object and the LCD, and the external light intensity of the LCD.

8. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 1, characterized in that: Determining whether the LCD is touched within a waiting time threshold and obtaining the LCD touch determination result includes the following steps: Acquire LCD touch data within a waiting time threshold, perform comprehensive analysis on the LCD touch data, and obtain an LCD touch evaluation value; Comparing the LCD touch evaluation value with a reference LCD touch definition value stored in a database; If the LCD touch evaluation value is equal to or greater than the reference LCD touch limit value, the LCD is touched within the waiting time threshold, and the LCD touch determination result is recorded as the LCD is touched; If the LCD touch evaluation value is less than the reference LCD touch limit value, the LCD is not touched within the waiting time threshold, and the LCD touch determination result is recorded as the LCD is not touched.

9. The LCD backlight intelligent adjustment system based on multiple sensors according to claim 8, characterized in that: The LCD touch data specifically includes the pressure value of the touch point on the LCD surface, the temperature of the touch point on the LCD surface, and the area of ​​the touch point on the LCD surface; The third brightness adjustment based on the LCD touch judgment result includes: If the LCD touch judgment result is recorded as the LCD being touched, the LCD backlight brightness is maintained at the brightness at the second brightness adjustment; If the LCD touch determination result is recorded as the LCD is not touched, the LCD backlight brightness is adjusted to the minimum brightness, and if the minimum brightness exceeds the waiting time threshold, the LCD backlight brightness is turned off.

10. A multi-sensor based LCD backlight intelligent adjustment method, using the multi-sensor based LCD backlight intelligent adjustment system as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Determine whether a person is approaching, and if a person is approaching, determine whether the person is watching the LCD, and perform a first brightness adjustment according to the results of whether the person is approaching and whether the person is watching the LCD. The results of the first brightness adjustment include turning off the backlight brightness, adjusting the backlight brightness to a first reference brightness, and adjusting the backlight brightness to a second reference brightness; When the backlight brightness is at the second reference brightness, determining whether the light intensity sensor is blocked, obtaining a result of the light intensity sensor blocking determination, and performing a second brightness adjustment according to the result of the light intensity sensor blocking determination; After the second brightness adjustment, it is determined whether the LCD within the waiting time threshold is touched, and an LCD touch determination result is obtained. Based on the LCD touch determination result, a third brightness adjustment is performed.

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