Operation protection method and device of electronic station sign, and electronic station sign

Abstract

The present application is applicable to the field of electronic display technology, and provides an operation protection method, device, and electronic bus stop sign for an electronic bus stop sign. The electronic bus stop sign includes a display screen, and the display screen corresponds to a visible space for display information. The operation protection method includes: obtaining the temperature information of the display screen, the light intensity information in the visible space for display information, and the image information in the visible space for display information; according to the temperature information, the light intensity information, and the image information, outputting a driving voltage protection signal to drive the display screen. The driving voltage protection signal of the above scheme combines three considerations. By using the driving voltage protection signal to drive the display screen, the display effect of the display screen can be controlled, thereby controlling the internal heat source of the electronic bus stop sign, so that the electronic bus stop sign can operate stably outdoors.

Description

Technical Field

[0001] The present application belongs to the field of electronic display technology, and in particular, relates to an operation protection method and device for an electronic bus stop sign, and an electronic bus stop sign. Background Art

[0002] At present, many outdoor electronic bus stops have ignored the heat dissipation effect of the electronic bus stops in order to ensure their stable operation outdoors and improve their sealing and corrosion resistance. Moreover, outdoor electronic bus stops are electronic products that run for a long time. If the heat dissipation effect of the heat dissipation system is not good, in hot and scorching areas, the high ambient temperature may easily lead to excessive chassis temperature, black screen or even system crash, resulting in the electronic bus stops being unable to operate stably. Therefore, there is an urgent need to provide an operation protection method for electronic bus stops so that the electronic bus stops can operate stably outdoors. Summary of the invention

[0003] The embodiments of the present application provide an operation protection method, device, and electronic bus stop sign, which can enable the electronic bus stop sign to operate stably outdoors.

[0004] A first aspect of an embodiment of the present application provides an operation protection method for an electronic station sign, wherein the electronic station sign includes a display screen, and the display screen corresponds to a visible space for displaying information. The operation protection method includes:

[0005] Acquire temperature information of the display screen, light intensity information within a visible space of the display information, and image information within a visible space of the display information;

[0006] A driving voltage protection signal is output according to the temperature information, the light intensity information and the image information to drive the display screen.

[0007] A second aspect of an embodiment of the present application provides an electronic station sign operation protection device, wherein the electronic station sign includes a display screen, the display screen corresponds to a visible space for displaying information, and the operation protection device includes:

[0008] An acquisition module, used to acquire temperature information of the display screen, light intensity information within a visible space of the display information, and image information within a visible space of the display information;

[0009] A generating module, configured to output a driving voltage protection signal according to the temperature information, the light intensity information and the image information;

[0010] The control module is used to send the driving voltage protection signal to the power supply of the display screen, so as to control the power supply to drive the display screen according to the driving voltage protection signal.

[0011] A third aspect of an embodiment of the present application provides an electronic bus stop sign, characterized in that the electronic bus stop sign comprises:

[0012] A controller, wherein a signal output terminal of the controller is coupled to the display screen;

[0013] A light measuring element, wherein an output end of the light measuring element is coupled to the display screen, and the light measuring element and the controller are connected in parallel;

[0014] A temperature measuring element, wherein the temperature measuring element is disposed on the display screen, and an output end of the temperature measuring element is coupled to the controller;

[0015] An image acquisition device, the output end of which is coupled to the controller and is used to acquire image information in a visible space corresponding to the display information on the display screen;

[0016] A power supply is used to drive the display screen according to the received driving voltage protection signal.

[0017] The fourth aspect of an embodiment of the present application provides a terminal device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the operation protection method of the electronic bus stop sign described in the first aspect above is implemented.

[0018] A fifth aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the operation protection method of the electronic bus stop sign described in the first aspect above is implemented.

[0019] A sixth aspect of the embodiments of the present application provides a computer program product. When the computer program product is run on a terminal device, the terminal device executes the operation protection method of the electronic bus stop sign described in the first aspect above.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects: the display screen of the electronic bus stop in the embodiments of the present application corresponds to a visible space for display information, and the visible space for display information means that the display information on the display screen can be seen by anyone in the visible space for display information. By obtaining the temperature information of the display screen, the light intensity information in the visible space for display information, and the image information in the visible space for display information, a driving voltage protection signal is output to drive the display screen. The driving voltage protection signal of the above scheme combines three considerations. By using the driving voltage protection signal to drive the display screen, the display effect of the display screen can be controlled, thereby controlling the internal heat source of the electronic bus stop, so that the electronic bus stop can operate stably outdoors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a flow chart of an operation protection method of an electronic station sign provided in Embodiment 1 of the present application;

[0023] Figure 2 This is a structural diagram of an electronic bus stop provided in Example 2 of the present application;

[0024] Figure 3 is a structural schematic diagram of an electronic bus stop provided by another embodiment of the present application;

[0025] Figure 4 is a structural schematic diagram of an electronic bus stop provided by another embodiment of the present application;

[0026] Figure 5 It is a structural diagram of an operation protection device for an electronic station sign provided in Embodiment 3 of the present application;

[0027] Figure 6 It is a structural diagram of a terminal device provided in Example 4 of the present application. DETAILED DESCRIPTION

[0028] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0029] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0030] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0031] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0032] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0033] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0034] It should be understood that the size of the serial numbers of the steps in this embodiment does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0035] In the prior art, in order to ensure the stable operation of outdoor electronic bus stops, the temperature of the electronic bus stop box is generally controlled under high temperature conditions to ensure the stable operation of the electronic bus stop. The temperature of the electronic bus stop box is generally controlled by collecting the box temperature, and after the box temperature reaches a preset value, the fan is started, and the fan speed is adjusted according to different box temperatures. However, if the heat is only dissipated by the fan, when the outdoor ambient temperature is high and the vents are blocked, the box temperature will continue to rise, and the heat dissipation effect will be poor, which will eventually cause the display screen and other components of the electronic bus stop to be unable to withstand the high temperature and be damaged.

[0036] In order to enable the electronic bus stop to operate stably in a complex outdoor environment, the embodiment of the present application generates a driving voltage protection signal for the display screen by acquiring the temperature information of the display screen, the light intensity information in the visible space of the display information, and the image information in the visible space of the display information, and drives the display screen based on the driving voltage protection signal of the display screen, wherein the display screen is the display screen of the electronic bus stop sign, and the visible space of the display information means that if the user is in the visible space of the display information, the user can see the display information on the display screen, such as the designated area in front of the display screen.

[0037] The driving voltage protection signal of the above scheme combines three considerations. Using the driving voltage protection signal to drive the display screen can control the display effect of the display screen, and then control the internal heat source of the electronic bus stop, thereby realizing the stable operation of the electronic bus stop in complex outdoor environments.

[0038] As an example and not a limitation, an electronic bus stop refers to an information display device that uses electronic technology to convert imperceptible signals into perceptible signals. That is, it can be a public information display device that displays text, images, two-dimensional or three-dimensional animations, and video signals such as television, video, VCD, etc., such as an electronic bus stop that displays public information.

[0039] In order to illustrate the technical solution of the present application, specific embodiments are provided below.

[0040] As an example, the electronic bus stop sign in the following embodiments may be understood as an electronic bus stop sign.

[0041] Reference Figure 1 , shows a flow chart of an operation protection method of an electronic station sign provided in the first embodiment of the present application. Figure 1 As shown, the operation protection method of the electronic station sign may include the following steps:

[0042] Step 101 , obtaining temperature information of the display screen, light intensity information in a visible space of display information, and image information in a visible space of display information.

[0043] In the embodiment of the present application, the electronic bus stop includes a display screen, and the display screen corresponds to a visible space for display information, that is, if a person is in the visible space for display information, the display information on the display screen can be viewed from any angle. For example, if the electronic bus stop includes a display screen that displays information on one side, the visible space for display information corresponding to the display screen can be determined based on the display surface of the display screen; if the electronic bus stop includes a display screen that displays information on multiple sides, the visible space for display information corresponding to the display screen can be determined based on the multiple display surfaces of the display screen.

[0044] In the embodiment of the present application, the temperature information of the display screen can be obtained by a temperature measuring element provided on the display screen, for example Figure 2The temperature measuring element in the electronic bus stop shown may be a temperature sensor, etc. The temperature sensor is coupled to the controller, and the temperature information of the display screen collected by the temperature sensor is obtained through AD sampling and conversion.

[0045] In the embodiment of the present application, the light intensity information in the visible space of the display information can be obtained by collecting light signals from a photometric element in the visible space of the display information, for example Figure 2 The photometric element shown, wherein the photometric element may be a light sensor, etc., can obtain light intensity information in a visible space of display information through the light sensor.

[0046] In the embodiment of the present application, the image information in the visible space of the display information can be obtained by collecting images through an image acquisition device. The image acquisition device can be installed inside the electronic bus stop, such as Figure 2 As shown, it can be applied to the case where the electronic bus stop includes a display screen that displays information on one side. In this case, the image acquisition device can be installed inside the electronic bus stop to capture the image in front of the display surface of the display screen to obtain the image information in the visible space of the display information; in addition, the image acquisition device can also be installed outside the electronic bus stop, such as Figure 3 As shown, it can be applied to the situation where the electronic bus stop includes multiple display screens for displaying information. In this case, the image acquisition device is installed at a position outside the electronic bus stop so that the image acquisition device can capture images within the visible space of the display information. In this case, the image acquisition device can transmit the captured image to the monitoring host, and the monitoring host transmits the image to the controller so that the controller can obtain the image information within the visible space of the display information, and the monitoring host can obtain the image captured by the image acquisition device in real time.

[0047] It should be understood that, under the premise that the image in the visible space of the display information can be captured, the present application does not limit the installation position of the image acquisition device.

[0048] It should be understood that the image acquisition device can be any device that can acquire images, such as a monocular camera, a binocular camera, a camera, etc.

[0049] Step 102: output a driving voltage protection signal to drive the display screen according to the temperature information, the light intensity information and the image information.

[0050] In the embodiments of the present application, since the outdoor environment of the electronic bus stop is generally more complex, taking the electronic bus stop as an example, the temperature of the environment in which the electronic bus stop is located is high, the light is strong, and the presence of people is detected in front of the electronic bus stop in the hot summer, a variety of factors are considered comprehensively, in order to make the display screen run stably and with low power consumption, a driving voltage protection signal of the display screen should be determined and output based on temperature information, light intensity information and image information, and then the display screen can be driven according to the driving voltage protection signal of the display screen, so that the display screen can run stably and with low power consumption.

[0051] In an embodiment of the present application, a driving voltage protection signal is transmitted to a power supply of a display screen. The power supply derives a driving voltage of a display screen according to the driving voltage protection signal, and drives the display screen based on the driving voltage of the display screen so that the display screen operates under the driving voltage.

[0052] In an embodiment of the present application, the power supply may include a backlight driver board, a scan driver board, etc., which can be used to drive the backlight display and resolution display of the display screen. The higher the brightness and resolution of the display screen, the higher its power consumption, which is the main source of heat for the electronic bus stop sign. Therefore, by reducing the brightness, resolution and other display effects of the display screen, the heat source can be reduced, thereby reducing the temperature inside the electronic bus stop sign box, and the electronic bus stop sign is protected from overheating so that the display screen can operate stably at high temperatures.

[0053] In a possible implementation, outputting a driving voltage protection signal according to temperature information, light intensity information, and image information includes:

[0054] When it is determined that the temperature value in the temperature information is not higher than the first target temperature value, the output driving voltage reduction signal is a first driving voltage signal, and the driving voltage reduction signal is used to reduce the driving voltage of the display screen;

[0055] Determining a second driving voltage signal corresponding to the image information according to the presence status of the person in the image information;

[0056] Determine, according to the light intensity information, a third driving voltage signal corresponding to the light intensity information;

[0057] A driving voltage protection signal is output according to the first driving voltage signal, the second driving voltage signal and the third driving voltage signal.

[0058] In the embodiment of the present application, in order to enable the display screen to operate stably and with low power consumption, a variety of factors need to be comprehensively considered. Therefore, before determining the driving voltage protection signal, the first, second and third driving voltage signals corresponding to the temperature information, light intensity information and image information should be determined respectively according to the temperature information, light intensity information and image information - that is, at the current temperature, the first driving voltage signal that should be output in order to enable the electronic station sign to operate stably and with low power consumption; according to the presence status of the characters in the image, the second driving voltage signal that should be output in order to enable the electronic station sign to operate stably and with low power consumption is determined; under the current light intensity, the third driving voltage signal that should be output in order to enable the electronic station sign to operate stably and with low power consumption. Comprehensively considering the impact of stable operation and power consumption, the driving voltage protection signal is output according to the first driving voltage signal, the second driving voltage signal and the third driving voltage signal.

[0059] In a possible implementation manner, before outputting the driving voltage reduction signal as the first driving voltage signal when determining that the temperature value in the temperature information is not higher than the first target temperature, the method further includes:

[0060] Comparing the temperature value in the current temperature information with the second target temperature value;

[0061] If the temperature value at the current moment is not less than the second target temperature value, then determining the driving voltage reduction signal corresponding to each preset voltage level according to the preset voltage level;

[0062] Output a driving voltage reduction signal corresponding to the highest preset voltage level;

[0063] Perform a cooling step, the cooling step comprising:

[0064] After a preset cooling time, the temperature information of the display screen is obtained. If the temperature value of the display screen is greater than the second target temperature value, a driving voltage reduction signal corresponding to the next preset voltage level is output; if the temperature value of the display screen is less than the second target temperature value and greater than the first target temperature value, the driving voltage reduction signal at this time is output; if the temperature value of the display screen drops to the first target temperature value, the driving voltage reduction signal at this time is adjusted to the first driving voltage signal;

[0065] If the temperature value of the display screen does not drop to the first target temperature value, the cooling step is executed cyclically until the temperature value of the display screen drops to the first target temperature value, and then the cooling step is terminated.

[0066] In the embodiment of the present application, the first driving voltage signal refers to the driving voltage signal that the display screen should receive to ensure that the display screen can work stably at the current temperature. That is, it can be understood that the first driving voltage signal can make the display screen work at a normal operating temperature.

[0067] For example, assuming that the current temperature of the display screen is 60 degrees Celsius, the first target temperature (i.e., the normal operating temperature) is 45 degrees Celsius, and the second target temperature is 55 degrees Celsius, where the second target temperature is the temperature at which the cooling starts. The second target temperature can be determined based on the protection temperature of the display screen and a temperature difference. For example, if the protection temperature of the display screen is 70 degrees and the temperature difference is 15 degrees, the second target temperature should be 70-15=55 degrees Celsius. When the temperature of the display screen reaches 55 degrees Celsius, the drive step-down signal is output according to the preset voltage level to reduce the temperature of the display screen.

[0068] The preset voltage level can be divided into three levels, namely 4V, 3.5V, and 3V. Each voltage level corresponds to a driving step-down signal, which is used to reduce the driving voltage of the display screen. The driving step-down signal can be a PWM duty cycle signal, which outputs a PWM duty cycle signal to enable the power supply to generate a corresponding driving voltage to drive the display screen for display.

[0069] Specifically, if the current temperature of the display screen is greater than 55 degrees Celsius, the drive voltage reduction signal corresponding to the highest preset voltage level is first output to reduce the drive voltage of the display screen, that is, reduce the drive voltage of the display screen to 4V. Secondly, the temperature of the display screen is continuously collected to perform a cooling process. The cooling process includes obtaining the temperature of the display screen at the current moment after the preset cooling time of 5 minutes. If the temperature of the display screen drops to 45 degrees Celsius, the duty cycle signal of the PWM output at this time is adjusted to the first drive voltage signal, that is, the first drive voltage signal is the duty cycle signal of the PWM output at this time, and the output of the PWM duty cycle signal is maintained to make the display screen work at 4V voltage. If the temperature of the display screen is less than 55 degrees but greater than 45 degrees after the cooling time of 5 minutes, the duty cycle signal at this time continues to be output. If the temperature of the display screen is still greater than 55 degrees Celsius after the cooling time of 5 minutes (that is, the output of the PWM duty cycle signal corresponding to 4V does not reduce the temperature of the display screen), the duty cycle signal of the PWM corresponding to 3.5V is output. The above-mentioned cooling process is repeated until the temperature of the display screen drops to 45 degrees Celsius, and it is determined that the PWM duty cycle signal at this time is the first driving voltage signal.

[0070] In a possible implementation, if a PWM duty cycle signal corresponding to 3V is output, and the temperature of the display continues to rise, when it rises to the protection temperature of the display, a PWM duty cycle signal corresponding to a driving voltage below 0.5V should be directly output to turn off the display, which can be achieved by Figure 4 The brightness sensor in the electronic bus stop shown determines the brightness percentage of the display screen at the current moment. When it is determined that the display screen is turned off, the PWM duty cycle signal at this moment is obtained as the first driving voltage signal.

[0071] In a possible implementation, if the temperature of the display screen is greater than a set temperature, a driving voltage signal is output and transmitted to the air outlet fan and the air inlet fan respectively, so as to drive the air outlet fan and the air inlet fan to operate respectively.

[0072] In the embodiments of the present application, Figure 4 As shown, the voltage input terminal of the outlet fan and the voltage input terminal of the inlet fan are both coupled to a signal output terminal of the controller, which are used to receive a driving voltage signal output by the controller, and the operating voltages of the outlet fan and the inlet fan are determined based on the driving voltage signal. The outlet fan and the inlet fan can operate based on the operating voltage.

[0073] Exemplarily, when the temperature of the display screen is greater than the set temperature and the temperature difference is less than or equal to 15 degrees Celsius, a driving voltage signal can be output to start the outlet fan and the air inlet fan to operate at a low speed; when the temperature difference is greater than or equal to 30 degrees Celsius, a driving voltage signal can be output to start the outlet fan and the air inlet fan to operate at full speed; when the temperature difference is between 15 degrees Celsius and 30 degrees Celsius, a driving voltage signal can be output based on the linear relationship between the temperature difference and the speed, so that the outlet fan and the air inlet fan can adjust the speed according to the linear relationship between the temperature difference and the speed.

[0074] In an embodiment of the present application, the outlet fan and the inlet fan are used to dissipate external heat for the electronic bus stop sign, and the driving voltage protection signal reduces the temperature of the heating element of the display screen from the source of heat by reducing the display brightness, display resolution or display refresh rate of the display screen, so as to dissipate internal heat for the electronic bus stop sign. When the operating temperature of the electronic bus stop sign is higher than the set temperature, both internal and external heat dissipation are performed simultaneously, and the heat dissipation effect is better.

[0075] In a possible implementation, determining the second driving voltage signal corresponding to the image information according to the presence status of the person in the image information includes:

[0076] Determine whether there is a mapping relationship between a person's presence state in the image information and a driving voltage signal in the first corresponding relationship, the first corresponding relationship including mapping relationships between M person's presence states and M driving voltage signals, where M is an integer greater than zero;

[0077] If there is a mapping relationship between the person's presence status in the image information and a driving voltage signal in the first corresponding relationship, the driving voltage signal having a mapping relationship with the person's presence status in the image information is extracted from the M driving voltage signals and determined as the second driving voltage signal.

[0078] In the embodiment of the present application, the M person existence states may include person existence and person non-existence. If a person is detected to appear in the image information, it indicates that the person existence state in the image information is person existence. If no person is detected to appear in the image information, it indicates that the person existence state in the image information is person non-existence. If there is no person in the image information, the driving voltage signal with a mapping relationship to the non-existence of the person should be extracted from the M driving voltage signals according to the first corresponding relationship, and the driving voltage signal is determined as the second driving voltage signal corresponding to the image information. Since the first corresponding relationship is pre-configured, based on the principle of reducing power consumption, the driving voltage corresponding to the driving voltage signal with a mapping relationship to the presence of the person can be configured to be higher, so that the display screen is displayed in a brighter state when there are people; and the driving voltage corresponding to the driving voltage signal with a mapping relationship to the non-existence of the person can be configured to be lower, so that the power consumption of the display screen can be reduced by reducing the brightness of the display screen when no one is watching the display screen.

[0079] In a possible implementation manner, the person presence state refers to the number of persons present, and determining the second driving voltage signal corresponding to the image information according to the person presence state in the image information includes:

[0080] Determine whether there is a mapping relationship between the number of people in the image information and a driving voltage signal in the third corresponding relationship, the third corresponding relationship including a mapping relationship between the number of K people and the K driving voltage signals, where K is an integer greater than zero;

[0081] If there is a mapping relationship between the number of people in the image information and a driving voltage signal in the third corresponding relationship, a driving voltage signal having a mapping relationship with the number of people in the image information is extracted from the K driving voltage signals and determined as the second driving voltage signal.

[0082] In the embodiment of the present application, the more characters there are in the image information, the greater the driving voltage corresponding to the driving voltage signal, and the brighter the display brightness of the display screen. Based on this principle, a mapping relationship between the number of K characters and the K driving voltage signals is configured. For example, when the number of characters is 1, the corresponding driving voltage signal is a PWM signal that can control the driving voltage to 2.7v, and when the number of characters is 2, the corresponding driving voltage signal is a PWM signal that can control the driving voltage to 3v, and so on. The present application does not limit the number of mapping relationships. Therefore, according to the number of characters in the image information at the current moment, it is possible to search in the third corresponding relationship whether there is a driving voltage signal that has a mapping relationship with the number of characters. If so, the driving voltage signal is extracted and the driving voltage signal is determined as the second driving voltage signal corresponding to the image information.

[0083] In a possible implementation manner, determining, according to the light intensity information, a third driving voltage signal corresponding to the light intensity information includes:

[0084] Determine whether there is a mapping relationship between light intensity information in the visible space of the display information and a driving voltage signal in the second corresponding relationship, the second corresponding relationship including mapping relationships between N light intensity information and N driving voltage signals, where N is an integer greater than zero;

[0085] If the second corresponding relationship contains a mapping relationship between the light intensity information in the visible space of the display information and a driving voltage signal, a driving voltage signal having a mapping relationship with the light intensity information in the visible space of the display information is extracted from the N driving voltage signals and determined as the third driving voltage signal.

[0086] In the embodiment of the present application, the greater the intensity of the light collected, the greater the driving voltage corresponding to the driving voltage signal, and the brighter the display brightness of the display screen. Based on this principle, a mapping relationship between N light intensity information and N driving voltage signals can be configured. For example, the light sensor itself is configured with a mapping relationship between light intensity information and driving voltage signals. After the light sensor collects a light intensity information, the corresponding driving voltage signal can be directly output. Therefore, according to the light intensity information at the current moment, the second corresponding relationship is searched to see whether there is a driving voltage signal corresponding to the light intensity information at the current moment. If so, the driving voltage signal is extracted, and the driving voltage signal is determined as the third driving voltage signal corresponding to the light intensity information at the current moment.

[0087] In a possible implementation, outputting a driving voltage protection signal according to the first driving voltage signal, the second driving voltage signal, and the third driving voltage signal includes:

[0088] Obtaining priorities of a first driving voltage signal, a second driving voltage signal, and a third driving voltage signal;

[0089] A driving voltage protection signal is output according to the priority of each driving voltage signal and the voltage value corresponding to each driving voltage signal.

[0090] In the embodiment of the present application, in order to make the electronic station sign have a longer service life, it is necessary not only to ensure the stable operation of the electronic station sign in the outdoor environment, but also to control the electronic station sign to perform intelligent display according to the external environment. Among them, stable operation is the prerequisite for realizing intelligent display, and in the process of realizing intelligent display, in order to extend the service life of the electronic station sign, the power consumption of the electronic station sign can be intelligently reduced.

[0091] As an example but not a limitation, the conditions for achieving the above-mentioned extension of the service life of the electronic bus stop sign can be prioritized as follows: stable operation, intelligent display, and reduced power consumption. Intelligent display means determining the display effect of the display screen according to the presence status of the person in the image information. For example, when the person exists, the display effect of the display screen is determined according to the light intensity information at the current moment. When the person does not exist, the display screen is made to work at the preset display drive voltage when the person does not exist. Reducing power consumption means determining the display effect of the display screen according to the light intensity information. For example, when the light intensity is high, the brightness of the display screen is increased, and when the light intensity is low, the brightness of the display screen is reduced.

[0092] It should be understood that stable operation means outputting a first driving voltage signal, intelligent display means outputting a second driving voltage signal according to image information, and reducing power consumption means outputting a third driving voltage signal according to light intensity information.

[0093] Therefore, in order to ensure that the output driving voltage protection signal of the display screen can simultaneously meet the above three conditions, the driving voltage protection signal of the display screen can be generated according to the priority of each driving voltage signal and the signal value of each driving voltage signal.

[0094] In a possible implementation, generating a driving voltage protection signal for a display screen according to the priority of each driving voltage signal and the voltage value corresponding to each driving voltage signal includes:

[0095] According to the priorities of the driving voltage signals, determining the driving voltage signal with the highest priority as the first target signal;

[0096] If the voltage values ​​corresponding to the other driving voltage signals are all greater than or equal to the voltage value corresponding to the first target signal, then the first target signal is determined to be a driving voltage protection signal for the display screen; or

[0097] If there is a voltage value corresponding to the other driving voltage signals that is smaller than the voltage value corresponding to the first target signal, a second target signal is determined from the other driving voltage signals, and the second target signal is determined to be a driving voltage protection signal for the display screen.

[0098] Exemplarily, the first driving voltage signal corresponds to a stable operation condition, the second driving voltage signal corresponds to an intelligent display condition, and the third driving voltage signal corresponds to a reduced power consumption condition. Assuming that the preset priority order is stable operation higher than intelligent display, and intelligent display higher than reduced power consumption, assuming that the application scenario at the current moment is that the voltage value of the driving voltage corresponding to the first driving voltage signal is 4V, the temperature of the display screen is normal temperature, and the display information shows that there is no one in the visible space, the voltage value of the driving voltage corresponding to the second driving voltage signal is 2.5V, and the light intensity in the light intensity information in the visible space of the display information is large, and the voltage value of the driving voltage corresponding to the third driving voltage signal is 4.5V. Then, first, it is determined that the first driving voltage signal is the first target signal, and secondly, it is determined that there is a driving voltage signal with a corresponding voltage value less than 4V in other driving voltage signals. Therefore, the second target signal should be determined from the second driving voltage signal and the third driving voltage signal, and then the second target signal is determined to be the driving voltage protection signal of the display screen.

[0099] In a possible implementation, if there is a voltage value corresponding to the other driving voltage signals that is smaller than the voltage value corresponding to the first target signal, determining the second target signal from the other driving voltage signals includes:

[0100] If, among the other driving voltage signals, there is a driving voltage signal corresponding to a voltage value that is smaller than the voltage value corresponding to the first target signal, then the driving voltage signal is determined to be the second target signal; or

[0101] If, among the other driving voltage signals, there are two driving voltage signals corresponding to voltage values ​​that are both smaller than the voltage value corresponding to the first target signal, and person information is detected in the image information corresponding to the second driving voltage signal, then the third driving voltage signal is determined to be the second target signal; or

[0102] If, among the other driving voltage signals, there are two driving voltage signals corresponding to voltage values ​​that are both smaller than the voltage value corresponding to the first target signal, and no character information is detected in the image information corresponding to the second driving voltage signal, then the driving voltage signal with the smallest corresponding voltage value among the two driving voltage signals is determined to be the second target signal.

[0103] Exemplarily, according to the above embodiment, if the voltage value 2.5V corresponding to the second driving voltage signal in the above other driving voltage signals is less than the voltage value 4V corresponding to the first target signal, the second driving voltage signal is determined to be the second target signal and is a driving voltage protection signal. Therefore, when no human information is detected in the visible space of the display information (i.e., the human presence state is that the human does not exist), and the display screen temperature of the electronic bus stop is normal, and the light intensity is high, according to the priority sorting, the driving voltage signal when no human information is detected in the visible space of the display information should be output.

[0104] For example, assuming that human information is detected in the visible space of the display information, the voltage value corresponding to the determined second driving voltage signal is 3.5V, the light intensity in the light intensity information in the visible space of the display information is small, and the voltage value of the driving voltage corresponding to the third driving voltage signal is 2V. Since the voltage values ​​corresponding to the two driving voltage signals are both smaller than the voltage value corresponding to the first target signal, it should be determined whether there is a person in the image information. When the presence of a person is detected, the driving voltage protection signal should be determined according to the light intensity information at the current moment, that is, the driving voltage signal corresponding to the third driving voltage signal 2V is determined to be the driving voltage protection signal, so as to ensure that people in the visible space of the display information at normal temperature can view the display screen information according to the light intensity of the environment at the current moment, and their viewing effect is better.

[0105] For example, assuming that no human information is detected in the visible space of the display information, the voltage value corresponding to the determined second driving voltage signal is 2.5V, the light intensity in the light intensity information in the visible space of the display information is small, and the voltage value of the driving voltage corresponding to the third driving voltage signal is 2V. Since the voltage values ​​corresponding to the two driving voltage signals are both smaller than the voltage value corresponding to the first target signal, it is necessary to detect whether there is a person in the image information. When no human information is detected in the image information corresponding to the second driving voltage signal, the driving voltage signal with the smallest corresponding voltage value among the two driving voltage signals is determined to be the second target signal, that is, the third driving voltage signal, to ensure that the power consumption of the display screen is reduced when there is no person.

[0106] In the embodiment of the present application, the display screen of the electronic bus stop corresponds to a visible space for display information, that is, the display information on the display screen can be seen by anyone in the visible space for display information. By acquiring the temperature information of the display screen, the light intensity information in the visible space for display information, and the image information in the visible space for display information, a driving voltage protection signal is output to drive the display screen. The driving voltage protection signal of the above scheme combines three considerations. By using the driving voltage protection signal to drive the display screen, the display effect of the display screen can be controlled, thereby controlling the internal heat source of the electronic bus stop, so that the electronic bus stop can operate stably outdoors.

[0107] See also Figure 2 , shows a structural schematic diagram of an electronic bus stop provided in Example 2 of the present application. The electronic bus stop includes a display screen, and also includes: a controller, a photometric element, a temperature measuring element, an image acquisition device and a power supply.

[0108] Specifically, a signal output terminal of the controller is coupled to the display screen; the controller is used to output a driving voltage protection signal to the display screen, the output terminal of the photometric element is coupled to the display screen, the photometric element is used to detect the light intensity information in the visible space of the display information, and output the corresponding driving voltage signal, wherein the photometric element and the controller are connected in parallel. The temperature measuring element is arranged on the display screen, the output terminal of the temperature measuring element is coupled to the controller, and is used to input the temperature information of the display screen to the controller; the output terminal of the image acquisition device is coupled to the controller, and is used to acquire the image information in the visible space of the display screen corresponding to the display information; the power supply is connected to the display screen through a power line, and is used to drive the display screen according to the received driving voltage protection signal. Among them, the power supply may include a backlight driving board and a scanning driving board, the backlight driving board drives the display screen to adjust the backlight according to the received driving voltage protection signal, and the scanning driving board determines that the display screen adjusts the display resolution according to the received driving voltage protection signal.

[0109] It should be understood that the power supply may also include a driver board for other display properties, such as refresh rate, etc., which is not limited in this application.

[0110] See also Figure 3 In another embodiment, the electronic bus stop also includes a monitoring host, the image acquisition device is coupled to one end of the monitoring host, and the other end of the monitoring host is coupled to the controller. In this embodiment, the image acquisition device is installed on the outside of the electronic bus stop, and the collected image information is transmitted to the controller through the monitoring host.

[0111] See also Figure 4 In another embodiment, the electronic bus stop also includes a brightness sensor, an air outlet fan and an air inlet fan.

[0112] Specifically, the brightness sensor is coupled to the controller, and is used to collect the brightness percentage of the display screen at the current moment, and transmit the brightness percentage to the controller through serial communication; the voltage input end of the outlet fan and the voltage input end of the inlet fan are both coupled to a signal output end of the controller, and are used to receive a driving voltage signal output by the controller, and the operating voltage of the outlet fan and the inlet fan is determined based on the driving voltage signal, and the outlet fan and the inlet fan can operate based on the operating voltage.

[0113] In a possible implementation, in order to save the equipment cost of the electronic bus stop, the controller can be a cloud server, which receives collected information sent by temperature measuring elements, light measuring elements, brightness sensors, image acquisition devices, etc. through wireless communication, generates a driving voltage protection signal based on the received collected information, and sends it to the display screen to drive the display screen for display.

[0114] See also Figure 5, shows a schematic diagram of the structure of an operation protection device for an electronic bus stop provided in Example 3 of the present application. For the sake of ease of explanation, only the parts related to the embodiment of the present application are shown.

[0115] The operation protection device of the electronic station sign can specifically include the following modules:

[0116] An acquisition module 501 is used to acquire temperature information of the display screen, light intensity information in a visible space of the display information, and image information in a visible space of the display information;

[0117] The output module 502 is used to output a driving voltage protection signal according to the temperature information, the light intensity information and the image information;

[0118] The control module 503 is used to send a driving voltage protection signal to a power supply of the display screen, so as to control the power supply to drive the display screen according to the driving voltage protection signal.

[0119] In the embodiment of the present application, the output module 502 may specifically include the following submodules:

[0120] A first determination submodule, used to determine that the driving voltage reduction signal output when the temperature value in the temperature information is not higher than the first target temperature value is a first driving voltage signal, and the driving voltage reduction signal is used to reduce the driving voltage of the display screen;

[0121] A second determination submodule, used to determine a second driving voltage signal corresponding to the image information according to the presence status of the person in the image information;

[0122] A third determination submodule, used to determine a third driving voltage signal corresponding to the light intensity information according to the light intensity information;

[0123] The protection signal generating submodule is used to output a driving voltage protection signal according to the first driving voltage signal and the second driving voltage signal and the third driving voltage signal.

[0124] In the embodiment of the present application, the output module 502 may further include the following submodules:

[0125] A comparison submodule, used to compare the temperature value in the temperature information at the current moment with a second target temperature value, the second target temperature value being greater than the first target temperature value;

[0126] A judgment submodule, for determining a driving voltage reduction signal corresponding to each preset voltage level according to the preset voltage level if the temperature value at the current moment is not less than the second target temperature value;

[0127] A signal output submodule, used to output a driving voltage reduction signal corresponding to the highest preset voltage level;

[0128] The cooling execution submodule is used to execute the cooling step, which includes: after a preset cooling time, obtaining the temperature information of the display screen, if the temperature value of the display screen is greater than the second target temperature value, outputting the driving voltage reduction signal corresponding to the next preset voltage level; if the temperature value of the display screen is less than the second target temperature value and greater than the first target temperature value, outputting the driving voltage reduction signal at this time; if the temperature value of the display screen drops to the first target temperature value, adjusting the driving voltage reduction signal at this time to the first driving voltage signal;

[0129] The loop execution submodule is used to loop the cooling step until the temperature value of the display screen drops to the first target temperature value, and then the cooling step ends.

[0130] In the embodiment of the present application, the second determining submodule may further include the following units:

[0131] A person determination unit, used to determine whether there is a mapping relationship between a person's existence state in the image information and a driving voltage signal in a first corresponding relationship, the first corresponding relationship including mapping relationships between M person's existence states and M driving voltage signals, where M is an integer greater than zero;

[0132] The signal extraction unit is used to extract the driving voltage signal having a mapping relationship with the existence state of the person in the image information and determine it as the second driving voltage signal if there is a mapping relationship between the existence state of the person in the image information and a driving voltage signal in the first corresponding relationship.

[0133] In the embodiment of the present application, the third determining submodule may further include the following units:

[0134] a light intensity determination unit, used to determine whether there is a mapping relationship between light intensity information in a visible space of display information and a driving voltage signal in a second corresponding relationship, wherein the second corresponding relationship includes a mapping relationship between N light intensity information and N driving voltage signals, where N is an integer greater than zero;

[0135] The signal determination unit is used to extract the driving voltage signal having a mapping relationship with the light intensity information in the visible space of the display information from the N driving voltage signals if there is a mapping relationship between the light intensity information in the visible space of the display information and a driving voltage signal in the second corresponding relationship, and determine it as the third driving voltage signal.

[0136] In the embodiment of the present application, the protection signal generation submodule can specifically protect the following units:

[0137] A priority acquisition unit, used to acquire the priorities of the first driving voltage signal, the second driving voltage signal and the third driving voltage signal;

[0138] Combined with the judging unit, it is used to output a driving voltage protection signal according to the priority of each driving voltage signal and the voltage value corresponding to each driving voltage signal.

[0139] In the embodiment of the present application, the judgment unit is specifically used for:

[0140] According to the priorities of the driving voltage signals, determining the driving voltage signal with the highest priority as the first target signal;

[0141] If the voltage values ​​corresponding to the other driving voltage signals are all greater than or equal to the voltage value corresponding to the first target signal, then the first target signal is determined to be a driving voltage protection signal for the display screen; or

[0142] If there is a voltage value corresponding to the other driving voltage signals that is smaller than the voltage value corresponding to the first target signal, a second target signal is determined from the other driving voltage signals, and the second target signal is determined to be a driving voltage protection signal for the display screen.

[0143] In the embodiment of the present application, the judgment unit can also be used to:

[0144] If, among the other driving voltage signals, there is a driving voltage signal corresponding to a voltage value that is smaller than the voltage value corresponding to the first target signal, then the driving voltage signal is determined to be the second target signal; or

[0145] If, among the other driving voltage signals, there are two driving voltage signals corresponding to voltage values ​​that are both smaller than the voltage value corresponding to the first target signal, and person information is detected in the image information corresponding to the second driving voltage signal, then the second driving voltage signal is determined to be the second target signal; or

[0146] If, among the other driving voltage signals, there are two driving voltage signals corresponding to voltage values ​​that are both smaller than the voltage value corresponding to the first target signal, and no character information is detected in the image information corresponding to the second driving voltage signal, then the driving voltage signal with the smallest corresponding voltage value among the two driving voltage signals is determined to be the second target signal.

[0147] The operation protection device of the electronic bus stop provided in the embodiment of the present application can be applied in the aforementioned method embodiment. For details, please refer to the description of the aforementioned method embodiment, which will not be repeated here.

[0148] Figure 6 Schematic diagram of the structure of the terminal device provided in the fourth embodiment of the present application. Figure 6 As shown, the terminal device 600 of this embodiment includes: at least one processor 610 ( Figure 6Only one is shown in the figure) a processor, a memory 620, and a computer program 621 stored in the memory 620 and executable on the at least one processor 610. When the processor 610 executes the computer program 621, the steps in the above-mentioned embodiment of the operation protection method of the electronic station sign are implemented.

[0149] The terminal device 600 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device may include, but is not limited to, a processor 610 and a memory 620. Those skilled in the art will appreciate that Figure 6 It is only an example of the terminal device 600 and does not constitute a limitation on the terminal device 600. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, for example, it may also include input and output devices, network access devices, etc.

[0150] The processor 610 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0151] In some embodiments, the memory 620 may be an internal storage unit of the terminal device 600, such as a hard disk or memory of the terminal device 600. In other embodiments, the memory 620 may also be an external storage device of the terminal device 600, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the terminal device 600. Further, the memory 620 may also include both an internal storage unit of the terminal device 600 and an external storage device. The memory 620 is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as the program code of the computer program, etc. The memory 620 may also be used to temporarily store data that has been output or is to be output.

[0152] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0153] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0154] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0155] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0156] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0157] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0158] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0159] The present application implements all or part of the processes in the above-mentioned embodiment method, and may also be completed through a computer program product. When the computer program product runs on a terminal device, the terminal device can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0160] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above-mentioned embodiments, a person skilled in the art should understand that the technical solutions described in the above-mentioned embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An operation protection method for an electronic station sign, characterized in that: The electronic station sign includes a display screen, the display screen corresponds to a visible space for display information, and the operation protection method includes: Acquire temperature information of the display screen, light intensity information within a visible space of the display information, and image information within a visible space of the display information; When it is determined that the temperature value in the temperature information is not higher than the first target temperature value, the output driving voltage reduction signal is a first driving voltage signal, and the driving voltage reduction signal is used to reduce the driving voltage of the display screen; Determining a second driving voltage signal corresponding to the image information according to the presence status of the person in the image information; Determining, according to the light intensity information, a third driving voltage signal corresponding to the light intensity information; Obtaining priorities of the first driving voltage signal, the second driving voltage signal, and the third driving voltage signal; According to the priorities of the driving voltage signals, determining the driving voltage signal with the highest priority as the first target signal; If the voltage values ​​corresponding to the other driving voltage signals are all greater than or equal to the voltage value corresponding to the first target signal, determining that the first target signal is a driving voltage protection signal of the display screen, and outputting the driving voltage protection signal to drive the display screen; If there is a voltage value corresponding to the other driving voltage signals that is smaller than the voltage value corresponding to the first target signal, a second target signal is determined from the other driving voltage signals, and the second target signal is determined to be a driving voltage protection signal of the display screen, and the driving voltage protection signal is output to drive the display screen.

2. The operation protection method according to claim 1, characterized in that: Before the step of determining that the driving voltage reduction signal output when the temperature value in the temperature information is not higher than the first target temperature value is the first driving voltage signal, the step of: Comparing the temperature value in the temperature information at the current moment with a second target temperature value, the second target temperature value being greater than the first target temperature value; If the temperature value at the current moment is not less than the second target temperature value, then determining the driving voltage reduction signal corresponding to each preset voltage level according to the preset voltage level; Output a driving voltage reduction signal corresponding to the highest preset voltage level; Perform a cooling step, the cooling step comprising: After a preset cooling time, the temperature information of the display screen is obtained; if the temperature value of the display screen is greater than the second target temperature value, a driving voltage reduction signal corresponding to the next preset voltage level is output; if the temperature value of the display screen is less than the second target temperature value and greater than the first target temperature value, a driving voltage reduction signal at this time is output; if the temperature value of the display screen drops to the first target temperature value, the driving voltage reduction signal at this time is adjusted to the first driving voltage signal; The cooling step is executed in a loop until the temperature value of the display screen drops to the first target temperature value, and then the cooling step is terminated.

3. The operation protection method according to claim 1, characterized in that: The step of determining the second driving voltage signal corresponding to the image information according to the presence state of the person in the image information includes: Determine whether there is a mapping relationship between a person's presence state in the image information and a driving voltage signal in a first corresponding relationship, wherein the first corresponding relationship includes mapping relationships between M person's presence states and M driving voltage signals, where M is an integer greater than zero; If there is a mapping relationship between the presence status of the person in the image information and a driving voltage signal in the first corresponding relationship, then the driving voltage signal that has a mapping relationship with the presence status of the person in the image information is extracted from the M driving voltage signals and determined as the second driving voltage signal.

4. The operation protection method according to claim 1, characterized in that: The step of determining, according to the light intensity information, a third driving voltage signal corresponding to the light intensity information comprises: Determine whether there is a mapping relationship between the light intensity information in the visible space of the display information and a driving voltage signal in the second corresponding relationship, wherein the second corresponding relationship includes mapping relationships between N light intensity information and N driving voltage signals, where N is an integer greater than zero; If the second corresponding relationship contains a mapping relationship between the light intensity information in the visible space of the display information and a driving voltage signal, then the driving voltage signal having a mapping relationship with the light intensity information in the visible space of the display information is extracted from the N driving voltage signals and determined as the third driving voltage signal.

5. The operation protection method according to claim 1, characterized in that: If there is a voltage value corresponding to the other driving voltage signals that is smaller than the voltage value corresponding to the first target signal, determining a second target signal from the other driving voltage signals comprises: If, among the other driving voltage signals, there is a driving voltage signal corresponding to a voltage value smaller than the voltage value corresponding to the first target signal, then the driving voltage signal is determined to be the second target signal; or if, among the other driving voltage signals, there are two driving voltage signals corresponding to voltage values ​​both smaller than the voltage value corresponding to the first target signal, and character information is detected in the image information corresponding to the second driving voltage signal, then the third driving voltage signal is determined to be the second target signal; or If, among the other driving voltage signals, there are two driving voltage signals corresponding to voltage values ​​that are both smaller than the voltage value corresponding to the first target signal, and no character information is detected in the image information corresponding to the second driving voltage signal, then the driving voltage signal with the smallest corresponding voltage value among the two driving voltage signals is determined to be the second target signal.

6. An operation protection device for an electronic station sign, characterized in that: The electronic station sign includes a display screen, the display screen corresponds to a visible space for displaying information, and the operation protection device includes: An acquisition module, used to acquire temperature information of the display screen, light intensity information within a visible space of the display information, and image information within a visible space of the display information; A first determining submodule, configured to determine that the driving voltage reduction signal output when the temperature value in the temperature information is not higher than the first target temperature value is a first driving voltage signal, wherein the driving voltage reduction signal is used to reduce the driving voltage of the display screen; A second determination submodule, configured to determine a second driving voltage signal corresponding to the image information according to the presence status of a person in the image information; A third determining submodule, used to determine a third driving voltage signal corresponding to the light intensity information according to the light intensity information; a priority acquisition unit, configured to acquire the priorities of the first driving voltage signal, the second driving voltage signal, and the third driving voltage signal; Combined with the judgment unit, it is used to determine the driving voltage signal with the highest priority as the first target signal according to the priorities of the driving voltage signals; If the voltage values ​​corresponding to the other driving voltage signals are all greater than or equal to the voltage value corresponding to the first target signal, then determining that the first target signal is the driving voltage protection signal of the display screen; If there is a voltage value corresponding to the other driving voltage signals that is smaller than the voltage value corresponding to the first target signal, a second target signal is determined from the other driving voltage signals, and the second target signal is determined to be a driving voltage protection signal of the display screen; The control module is used to send the driving voltage protection signal to the power supply of the display screen, so as to control the power supply to drive the display screen according to the driving voltage protection signal.

7. An electronic bus stop sign, characterized in that: For implementing the operation protection method according to any one of claims 1 to 5, the electronic station sign comprises: A controller, wherein a signal output terminal of the controller is coupled to the display screen; A light measuring element, wherein an output end of the light measuring element is coupled to the display screen, and the light measuring element and the controller are connected in parallel; A temperature measuring element, wherein the temperature measuring element is disposed on the display screen, and an output end of the temperature measuring element is coupled to the controller; An image acquisition device, the output end of which is coupled to the controller and is used to acquire image information in a visible space corresponding to the display information on the display screen; A power supply is used to drive the display screen according to the received driving voltage protection signal.

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