CN111435584A - Information display lamp and display control device and method thereof - Google Patents

Abstract

The application relates to an information display lamp and a display control device and method thereof. When a preset emergency condition is detected, a scanning signal is output to the display lamp array according to a preset line scanning period, and the display lamp array is scanned; When it is detected that the preset power-saving lighting conditions are met, the duty ratio of the scanning signal in the line scanning period is adjusted to reduce the brightness of the display lamp array. By controlling the duty ratio of the scanning signal in the scanning period, the display lamp array can have different display brightness when it meets the emergency conditions and when it meets the power-saving lighting conditions, and realizes the brightness adjustment of the display lamp array, so that the information display lamps can be displayed in different lighting conditions. Under the circumstance, the display brightness changes, the indication effect is more obvious, and the reliability of use is improved.

Description

Information display lamp and display control device and method thereof

technical field

The present application relates to the technical field of display control, and in particular, to an information display lamp and a display control device and method thereof.

Background technique

With the development of society and the continuous progress of science and technology, people pay more and more attention to public safety. As a kind of information display light, emergency lights are widely used in schools, units and communities, etc., by displaying relevant information to provide guidance for users, such as guiding the direction of escape in the event of a fire, for the purpose of fire emergency evacuation instructions.

When the traditional information display lamp is working, the controller controls the display lamp to light up according to the preset brightness. Since the information display light is continuously displayed with the same brightness, the indication effect is poor, and it cannot effectively guide people to evacuate. Traditional information display lamps have the disadvantage of poor reliability in use.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an information display lamp with high reliability and a display control device and method for the above problems.

A display control device for an information display lamp, comprising: a line scan controller and a line scan drive circuit, the line scan controller is connected to the line scan drive circuit, and the line scan drive circuit is used to connect the display of the information display lamp lamp array;

The line scan controller is used to control the line scan drive circuit to output a scan signal to the display lamp array according to a preset line scan period when detecting that the preset emergency condition is met, and to scan the display lamp array ; is also used for controlling the line scan driving circuit to adjust the duty ratio of the scan signal in the line scan period to reduce the brightness of the display lamp array when it is detected that the preset power-saving lighting conditions are met.

A display control method for an information display lamp, comprising:

When it is detected that the preset emergency conditions are met, output a scanning signal to the display lamp array of the information display lamp according to the preset line scanning period, and scan the display lamp array;

When it is detected that the preset power-saving lighting conditions are met, the duty ratio of the scanning signal in the line scanning period is adjusted to reduce the brightness of the display lamp array.

An information display lamp includes an array of display lamps and the above-mentioned display control device.

The above information display lamp and its display control device and method, when it is detected that a preset emergency condition is met, a scanning signal is output to the display lamp array according to a preset line scanning period, and the display lamp array is scanned; When the power-saving lighting condition is set, the duty ratio of the scanning signal in the line scanning period is adjusted to reduce the brightness of the display lamp array. By controlling the duty ratio of the scanning signal in the scanning period, the display lamp array can have different display brightness when it meets the emergency conditions and when it meets the power-saving lighting conditions. Under the circumstance, the display brightness changes, the indication effect is more obvious, and the reliability of use is improved.

Description of drawings

1 is a structural block diagram of a display control device of an information display lamp in an embodiment;

2 is a structural block diagram of a display control device for an information display lamp in another embodiment;

3 is a schematic structural diagram of a display control device for an information display lamp in an embodiment;

4 is a schematic structural diagram of a line scan controller and a line scan driver circuit in an embodiment;

5 is a schematic structural diagram of a column control circuit in an embodiment;

6 is a schematic structural diagram of a display lamp array in an embodiment;

7 and 8 are schematic diagrams of brightness adjustment in an embodiment;

9 is a schematic diagram of a scan timing interrupt in an embodiment;

FIG. 10 is a flowchart of a display control method of an information display lamp in an embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

In one embodiment, a display control device for an information display lamp is provided, and the information display lamp may specifically be an emergency lamp or the like. As shown in FIG. 1 , the display control device includes a line scan controller 110 and a line scan drive circuit 120 , the line scan controller 110 is connected to the line scan drive circuit 120 , and the line scan drive circuit 120 is used for connecting to the display lamp array 210 of the information display lamp. . The line scan controller 110 is configured to control the line scan drive circuit 120 to output a scan signal to the display lamp array 210 according to a preset line scan period to scan the display lamp array 210 when a preset emergency condition is detected. The line scan controller 110 is further configured to control the line scan drive circuit 120 to adjust the duty ratio of the scan signal in the line scan period to reduce the brightness of the display lamp array 210 when it is detected that the preset power saving lighting condition is met.

Specifically, when the display lamp array 210 of the information display lamp needs to be controlled to light up, the line scan controller 110 outputs a control command to the line scan drive circuit 120 to control the line scan drive circuit 120 to output the scan according to the preset line scan cycle. The signal scans the display lamp array 210 , and adjusts the duty ratio of the scan signal in the scanning period in combination with the detected and met conditions, so as to change the brightness of the display lamp array 210 . The line scanning period refers to the scanning period of each line of display lamps in the display lamp array 210 , and the specific value is not unique, and can be adjusted according to the actual situation. The scanning signal is sent to the display lamp array 210 during the line scanning period, and the lighting time of the display lamp array 210 is controlled in combination with the duty cycle adjustment, so as to realize brightness adjustment.

Among them, adjusting the duty ratio of the scanning signal in the line scanning period to reduce the brightness of the display lamp array 210 refers to reducing the level at which the corresponding line display lamp is controlled to light up in the scanning period by controlling the level of the output scanning signal. It accounts for the proportion of the entire scanning period, so that the lighting duration of each row of display lamps in the scanning period is reduced, and the brightness of the display lamp array 210 is reduced. The scan signal output by the line scan drive circuit 120 may specifically control the display lamp to light up when the high level is high, and control the display lamp to turn off when the low level is low; or control the display lamp to light up when the low level is low, and control the display when the high level is high. The light goes out. In one embodiment, when the line scan controller 110 detects that a preset emergency condition is met, it controls the line scan drive circuit 120 to output a low level during the line scan period to turn on the display lamp, that is, to control the display in the emergency mode The lamps are lit throughout the scan cycle, causing the display lamp array 210 to be highlighted. When the line scan controller 110 detects that the preset power-saving lighting conditions are met, it controls the line scan driving circuit 120 to reduce the proportion of the low level in the scan period, thereby reducing the power of the display lamp array 210 in the power-saving lighting mode. Brightness, save energy.

The specific contents of emergency conditions and power-saving lighting conditions are not unique, and can be set according to actual needs. In one embodiment, the emergency condition includes receiving an emergency control instruction, and the power-saving lighting condition includes receiving a power-saving control instruction. Specifically, the operator can switch the mode of the information display lamp by sending a control command to the line scan controller 110 . When it is necessary to control the information display lamp to enter the emergency mode, the operator can send an emergency control command to the line scan controller 110 through the control terminal to control the information display lamp to enter the emergency mode, and the display lamp array 210 is highlighted. When it is necessary to control the information display lamp to enter the power-saving lighting mode, the operator can send a power-saving control command to the line scan controller 110 through the control terminal, so as to control the information display lamp to enter the power-saving lighting mode and reduce the power consumption of the display lamp array 210. brightness. The operator can send the corresponding control command according to the actual needs to adjust the mode of the control information and display lamps, and the operation is simple and fast.

Further, the control terminal and the line scan controller 110 may communicate in a wired or wireless manner. In one embodiment, the display control device further includes a wireless communication device connected to the line scan controller 110, and the line scan controller 110 receives the control instruction sent by the control terminal through the wireless communication device. The mode of the control information display lamp is controlled wirelessly, which further improves the convenience of operation.

In another embodiment, the emergency condition includes detecting that the power supply network is powered off, and the power saving lighting condition includes detecting that the power supply network is powered off and not powered off. Specifically, the line scan controller 110 may be connected to a power supply network, and the power supply network will be powered off when emergencies such as fire and earthquake occur. When it is detected that the power supply network is powered off, the control information indicates that the lamp enters the emergency mode, and the display lamp array 210 is highlighted to provide escape guidance for people. When the power supply network is normal, the information display lamps can be controlled to be in the power-saving lighting mode to reduce energy consumption, and the indication effect of the information display lamps can also be improved by changing the brightness in different modes.

In this embodiment, the mode switching of the information display lamps is directly performed according to the power supply status of the power supply network, so that the information display lamps have the function of changing the display brightness under different conditions, and timely switch to highlight display in emergency situations to provide people with guide, the operation is more reliable.

In another embodiment, the emergency condition includes that the detected ambient temperature is less than a preset temperature threshold, and the power-saving lighting condition includes that the detected ambient temperature is greater than or equal to the preset temperature threshold. The specific value of the preset temperature threshold is not unique. Specifically, the display control device may include a temperature sensor connected to the line scan controller 110, and the temperature sensor detects information to display the ambient temperature of the lamp, and generates a sensing signal and sends it to the line scan controller 110. The scan controller 110 and the line scan controller 110 obtain the ambient temperature according to the sensing signal. When the ambient temperature is lower than the preset temperature threshold, it is considered to be at night, the line scan controller 110 controls the information display lamp to enter the emergency mode, and the display lamp array 210 is highlighted so that people can clearly see the information displayed by the information display lamp. When the ambient temperature is less than or equal to the preset temperature threshold, it can be considered that it is daytime, and the line scan controller 110 controls the information to display that the lamp is in a power-saving lighting mode to reduce energy consumption.

In this embodiment, the mode switching is performed by sensing the environmental information of the information display lamp, so as to realize the automatic switching of the display mode according to the environment, which can also improve the operation reliability of the information display lamp.

When the information display lamps are in different modes, the line scan controller 110 scans the display lamp array 210 by controlling the line scan drive circuit 120 to output scan signals. The specific manner of scanning the display lamp array 210 is not unique, and may be progressive scanning or interlaced scanning. In one embodiment, the line scan controller 110 controls the line scan driving circuit 120 to perform interlaced scanning on the display lamp array 210 to ensure that the display lamp array 210 has a better display effect.

When the information display lamp needs to be controlled to enter the power-saving lighting mode, the specific manner in which the line scan controller 110 controls the line scan drive circuit 120 to adjust the duty ratio of the scan signal in the line scan period is not unique. In one embodiment, the line scan controller 110 controls the line scan drive circuit 120 to adjust the duty cycle of the scan signal in the line scan period according to the preset power-saving brightness threshold when detecting that the preset power-saving lighting condition is met. . The specific value of the power-saving brightness threshold is not unique. In one embodiment, the power-saving brightness threshold may be set to be one-fifth of the brightness of the information display lamp when it is highlighted in emergency mode. Specifically, the line scanning controller 110 can control the scanning signal output by the line scanning driving circuit 120 to have a low level occupying one fifth of the entire scanning period, so that the display lamps of each row of the display lamp array 210 are only displayed in the fifth scanning period of the scanning period. It is lit for one-half of the time, so as to achieve the purpose of reducing the brightness of the display lamp array 210 . Further, in this embodiment, the scan signal output by the line scan driving circuit 120 is at a low level within one fifth of the scan period from the start time of the scan period. The display control is simple and reliable by controlling the display lamps of each row to light up in the initial time period of the display cycle.

Further, in one embodiment, the line scan controller 110 is further configured to receive a brightness threshold adjustment instruction, and adjust the power-saving brightness threshold according to the brightness threshold adjustment instruction. Similarly, the operator can also send the brightness threshold adjustment command to the line scan controller 110 through the control terminal to adjust the saved power-saving brightness threshold, which is convenient for the operator to change the information according to actual needs to display when the lamp is in the power-saving lighting mode. high display brightness, which improves the convenience of use of information display lamps.

In another embodiment, the line scan controller 110 controls the line scan drive circuit to adjust the duty cycle of the scan signal in the line scan period according to the preset brightness adjustment range when detecting that the preset power-saving lighting condition is met. Likewise, the specific value of the brightness adjustment range is not unique. When the information display lamp needs to be controlled to enter the power-saving lighting mode, the duty cycle of the scan signal is changed according to the preset brightness adjustment range, so as to reduce the brightness of the display lamp array 210 . For example, by reducing the proportion of the low level of the scanning signal in the scanning cycle time, 1/2 or 4/5 of the brightness of the information display lamps in the emergency mode can be used as the brightness adjustment range, so that the brightness of the display lamp array 210 can be adjusted. Brightness decreases. In addition, the operator can also send an instruction to the line scan controller 110 to adjust the brightness adjustment range.

In one embodiment, as shown in FIG. 2 , the display control device further includes a column control circuit 130 connected to the display lamp array 210 . The column control circuit 130 is configured to send data to the display lamp array 210 when the row scan driving circuit 120 outputs a scan signal to scan the display lamp array 210 . Specifically, the column control circuit 130 controls the on-off of the display lamps in the display lamp array 210 by sending data to the display lamps of the corresponding column in combination with the scanning signals output by the row scan driving circuit 120 . When the scan signal output by the row scan driving circuit 120 scans the display lamps of a certain row, the column control circuit 130 sends data to the display lamps of all columns, so that all or part of the display lamps of the row being scanned are turned on. After the scanning of the entire display lamp array 210 is completed, information such as corresponding characters or patterns can be displayed on the display lamp array 210 to guide people to escape. Further, as shown in FIG. 3 , the number of the row scan controller 110 , the row scan driving circuit 120 and the column control circuit 130 is not unique, and may be one, or two or more, depending on the display lamp. The number of display lamps in the array 210 is adjusted.

It can be understood that the specific types and structures of the row scan controller 110 , the row scan driving circuit 120 and the column control circuit 130 are not unique. As shown in FIG. 4 , the row scan controller 110 adopts the control chip IC8 . Specifically, the control chip IC8 may be a serial-in-parallel-out chip with a model of 74HC595. In one embodiment, the row scanning driving circuit 120 includes two or more row driving units, and each row driving unit is connected to the row scanning controller 110 and is respectively connected to the display lamps of the corresponding row in the display lamp array 210 . The specific type of the display lamp array 210 is not unique. In one embodiment, the display lamp array 210 is an LED (Light Emitting Diode, light emitting diode) matrix.

The type and number of row driving units are not unique. As shown in FIG. 4 , the row driving unit may specifically include a driver chip IC7 , a driver chip IC9 , a driver chip IC10 and a driver chip IC11 . Each driver chip is connected to the control chip IC8, and each driver chip is respectively connected to two rows of LED lights in the LED matrix. In this embodiment, the driving chip can be a chip with a model of 4953, and the port LED_ROW1 to the port LED_ROW8 are respectively connected to a corresponding row of LED lights. As shown in FIG. 5 , the column control circuit 130 includes a chip IC1 and a peripheral circuit. The chip IC1 is connected to the LED matrix and receives external signals through the peripheral circuit. In this embodiment, the chip IC1 can be specifically a chip with a model of MB15043, and the port LED_G1 to the port LED_G16 are respectively connected to a corresponding row of LED lights in the LED matrix. At this time, the LED matrix is designed as a matrix with 8 rows and 16 columns, and each row and each column is connected to the corresponding port respectively. information.

It can be understood that the LED matrix is not limited to being designed as a matrix of 8 rows and 16 columns. As shown in Figure 6, the LED matrix is a small matrix of 4X4, which consists of LED lights D28-LED lights D31, LED lights D63-LED lights D66, LED lights Light D98-LED light D101, LED light D133-LED light D136. The rows of the LED matrix are connected to the row scan driving circuit 120 through the port LED_ROW1-port LED_ROW4, and the columns of the LED matrix are connected to the column control circuit 130 through the port LED_G1-port LED_G4. The 4X4 small matrix control steps are as follows:

The voltage of LED_ROW1 is powered on 5V, and at the same time LED_ROW2, LED_ROW3, and LED_ROW4 are 0; send the data required for the first row to LED_G1, LED_G2, LED_G3, and LED_G4.

The voltage of LED_ROW2 is powered on 5V, and at the same time LED_ROW1, LED_ROW3, LED_ROW4 are 0; send the data required for the second row to LED_G1, LED_G2, LED_G3, LED_G4.

The voltage of LED_ROW3 is powered on 5V, and at the same time LED_ROW1, LED_ROW2, and LED_ROW4 are 0; send the data required by the third row to LED_G1, LED_G2, LED_G3, and LED_G4.

The voltage of LED_ROW4 is powered on 5V, and at the same time LED_ROW1, LED_ROW2, LED_ROW3 are 0; send the data required by the fourth row to LED_G1, LED_G2, LED_G3, LED_G4.

For the entire LED matrix, the on-off of each row is controlled by the serial-in and parallel-out 74HC595 chips to scan the entire screen. For good results, each scan line is interlaced. For example, first pair rows 1, 3, 5, 7, 9. . . . Scan, then on lines 2,4,6,8,10. . . . to scan.

The principle of brightness adjustment is shown in Figure 7 and Figure 8. The 74HC595 chip adjusts the brightness by adjusting the duty cycle of the scan signal and changing the brightness signal in the scan period. Each row of the LED matrix has a fixed display period, and all 32 rows are scanned as a screen scan period. For example, if the scanning period of one line of LED lights is 0.5ms, then the complete scanning time of all 32 lines is 16ms; the frame frequency is 1000/16=62.5HZ.

The brightness signal is to control the turn-on time in the time of each cycle and each line. If the scanning period is 0.5ms, all dots will be the brightest, and if the scanning period is 0.5ms, only 0.1ms will be lit. Then the brightness will be only 1/5 of the original. As shown in FIG. 8 , the time of the scanning period T1 is 0.5ms, and the time of the display time t1 is 0.05ms, then the brightness will be dimmed. When the 74HC595 chip performs line scanning, the scanning timing is interrupted, and the interruption time is 100us. Figure 9 shows the schematic diagram of the scanning timing interruption.

The display control device of the above information display lamp, by controlling the duty ratio of the scanning signal in the scanning period, makes the display lamp array 210 have different display brightness when it meets the emergency conditions and when it meets the power-saving lighting conditions, and realizes the display lamp array 210. The brightness adjustment of 210 makes the display brightness of the information display lamps change in different situations, and the indication effect is more obvious, which improves the reliability of use.

In one embodiment, a display control method of an information display lamp is provided, and the information display lamp may specifically be an emergency lamp or the like. As shown in Figure 10, the method includes:

Step S110: When it is detected that the preset emergency condition is met, output a scan signal to the display lamp array of the information display lamp according to the preset line scanning period, and scan the display lamp array.

When it is necessary to control the display lamp array of the information display lamp to light up, the line scan controller can output a control command to the line scan drive circuit, so as to control the line scan drive circuit to output the scan signal according to the preset line scan cycle to perform the operation on the display lamp array. scanning. The line scan period refers to the scan period of each line of display lamps in the display lamp array, and the specific value is not unique and can be adjusted according to the actual situation. In one embodiment, when it is detected that a preset emergency condition is met, a low level is output during the line scan period to light up the display light, that is, in the emergency mode, the display light is controlled to light up throughout the scan period, so that the display light is turned on. The array is highlighted.

Step S120 : when it is detected that the preset power-saving lighting condition is met, adjust the duty ratio of the scanning signal in the line scanning period to reduce the brightness of the display lamp array.

Among them, adjusting the duty cycle of the scanning signal in the line scanning period to reduce the brightness of the display lamp array means that by controlling the level of the output scanning signal, the level of controlling the corresponding line display lamp to light up in the scanning period is reduced. The proportion of the entire scanning period, so that the lighting time of each row of display lamps in the scanning period is reduced, and the brightness of the display lamp array is reduced. When it is detected that the preset power-saving lighting conditions are met, the proportion of the low level in the scanning period is reduced, thereby reducing the brightness of the display lamp array in the power-saving lighting mode and saving energy.

The specific contents of emergency conditions and power-saving lighting conditions are not unique, and can be set according to actual needs. In one embodiment, the emergency condition includes receiving an emergency control instruction, and the power-saving lighting condition includes receiving a power-saving control instruction. In another embodiment, the emergency condition includes detecting that the power supply network is powered off, and the power saving lighting condition includes detecting that the power supply network is powered off and not powered off. In another embodiment, the emergency condition includes that the detected ambient temperature is less than a preset temperature threshold, and the power-saving lighting condition includes that the detected ambient temperature is greater than or equal to the preset temperature threshold.

When the information display lamps are in different modes, they all output scanning signals to scan the display lamp array. The specific manner of scanning the display lamp array is not unique, and may be progressive scanning or interlaced scanning. In one embodiment, the line scanning controller controls the line scanning driving circuit to perform interlaced scanning on the display lamp array, so as to ensure that the display lamp array has a better display effect.

When the information display lamp needs to be controlled to enter the power-saving lighting mode, the specific manner in which the line scan controller controls the line scan drive circuit to adjust the duty ratio of the scan signal in the line scan period is not unique. In one embodiment, step S120 includes: when it is detected that the preset power-saving lighting condition is met, controlling the line scan driving circuit to adjust the duty cycle of the scan signal in the line scan period according to the preset power-saving brightness threshold. The specific value of the power-saving brightness threshold is not unique. In one embodiment, the power-saving brightness threshold may be set to be one-fifth of the brightness of the information display lamp when it is highlighted in emergency mode. Further, in one embodiment, after step S120, the method may further include a step of receiving a brightness threshold adjustment instruction, and adjusting the power-saving brightness threshold according to the brightness threshold adjustment instruction.

In another embodiment, step S120 includes: when it is detected that the preset power-saving lighting conditions are met, when it is detected that the preset power-saving lighting conditions are met, controlling the line scan driving according to the preset brightness adjustment range The circuit adjusts the duty cycle of the scan signal in the line scan period. Likewise, the specific value of the brightness adjustment range is not unique. When the information display lamp needs to be controlled to enter the power-saving lighting mode, the duty cycle of the scan signal is changed according to the preset brightness adjustment range, so as to reduce the brightness of the display lamp array 210 .

For the specific limitation of the display control method of the information display lamp, reference may be made to the limitation of the display control device of the information display lamp above, which will not be repeated here.

The display control method of the above information display lamps, by controlling the duty ratio of the scanning signal in the scanning period, enables the display lamp array to have different display brightness under emergency conditions and when it meets the power-saving lighting conditions, and realizes the display lamp array. Brightness adjustment makes the display brightness of the information display lamps change in different situations, the indication effect is more obvious, and the reliability of use is improved.

In one embodiment, an information display light fixture is provided, which may be an emergency light or the like. The information display lamp includes an array of display lamps and the above-mentioned display control device. Among them, the LED matrix can be used as the display lamp array.

The above information display lamps, by controlling the duty ratio of the scanning signal in the scanning period, make the display lamp array have different display brightness under emergency conditions and when meeting the power-saving lighting conditions, and realize the brightness adjustment of the display lamp array. The information display lamps have display brightness changes under different circumstances, and the indication effect is more obvious, which improves the reliability of use.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (10)

1. A display control device for an information display lamp, characterized in that it comprises: a line scan controller and a line scan drive circuit, the line scan controller is connected to the line scan drive circuit, and the line scan drive circuit is used for The display lamp array of the connection information display lamp; The line scan controller is used to control the line scan drive circuit to output a scan signal to the display lamp array according to a preset line scan period when detecting that the preset emergency condition is met, and to scan the display lamp array ; is also used for controlling the line scan driving circuit to adjust the duty ratio of the scan signal in the line scan period to reduce the brightness of the display lamp array when it is detected that the preset power-saving lighting conditions are met. 2. The display control device according to claim 1, wherein the emergency condition comprises receiving an emergency control instruction, and the power saving lighting condition comprises receiving a power saving control instruction; or The emergency condition includes detecting that the power supply network is powered off, and the power-saving lighting condition includes detecting that the power supply network is powered off and not powered off; or The emergency condition includes that the detected ambient temperature is less than a preset temperature threshold, and the power-saving lighting condition includes that the detected ambient temperature is greater than or equal to the preset temperature threshold. 3 . The display control device according to claim 1 , wherein the line scanning controller controls the line scanning driving circuit to perform interlaced scanning or progressive scanning on the display lamp array. 4 . 4 . The display control device according to claim 1 , wherein when the line scan controller detects that a preset power-saving lighting condition is met, the line scan controller controls the line scan according to a preset power-saving brightness threshold. 5 . The driving circuit adjusts the duty ratio of the scanning signal in the line scanning period. 5 . The display control device according to claim 4 , wherein the line scan controller is further configured to receive a brightness threshold adjustment instruction, and adjust the power-saving brightness threshold according to the brightness threshold adjustment instruction. 6 . 6 . The display control device according to claim 1 , wherein the line scan controller controls the line scan drive according to a preset brightness adjustment range when detecting that a preset power-saving lighting condition is met. 7 . The circuit adjusts the duty cycle of the scan signal in the line scan period. 7 . The display control device according to claim 1 , wherein the row scanning driving circuit comprises two or more row driving units, and each of the row driving units is connected to the row. 8 . The scanning controller is respectively connected to the display lamps of the corresponding row in the display lamp array. 8 . The display control device according to claim 1 , further comprising a column control circuit connected to the display lamp array. 9 . 9. A display control method for an information display lamp, comprising: When it is detected that the preset emergency conditions are met, output a scanning signal to the display lamp array of the information display lamp according to the preset line scanning period, and scan the display lamp array; When it is detected that the preset power-saving lighting conditions are met, the duty ratio of the scanning signal in the line scanning period is adjusted to reduce the brightness of the display lamp array. 10. An information display lamp, characterized by comprising a display lamp array and the display control device according to any one of claims 1-8.

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