Human eye protection method of laser equipment and laser equipment

Abstract

The embodiment of the invention belongs to the technical field of display, and provides a human eye protection method of laser equipment and the laser equipment. The method comprises the steps that detection signals of a plurality of continuous reading periods are obtained, the detection signals are obtained by processing infrared detection signals, and the detection signals comprise a first flag bit and a second flag bit; and according to the first flag bit, determining the state of the user in a plurality of reading periods, according to the second flag bit, determining a signal intensity value, and if the state is close to the display device and a signal intensity value greater than or equal to a preset intensity threshold exists in the signal intensity values of the plurality of detection signals, triggering a human eye protection function. Whether the human eye protection function is triggered or not is judged according to the state of the user and the signal intensity, the judgment accuracy is improved, and the situation that the screen is closed due to frequent triggering of the human eye protection function is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a human eye protection method for laser equipment and laser equipment. Background Art

[0002] The projection device can use the human eye protection detection function to trigger the human eye protection function when a person approaches the light source, and turn off the light source to achieve the effect of protecting the eyes.

[0003] At present, the projection equipment receives the trigger signal through the pyroelectric sensor, converts it into a weak electrical signal, uses an operational amplifier to amplify the weak electrical signal, outputs the signal to the transistor through a comparator, converts it into a pulse signal, and sends it to the microcontroller unit (MCU). The MCU determines whether to trigger the human eye protection function based on the number of pulses per unit time.

[0004] However, the detection sensitivity of the above method is relatively high, and the eye protection function is easily triggered when the user approaches or passes by the projection device at a long distance. The judgment accuracy is low, and frequent triggering of the eye protection function causes the screen to shut down, affecting the user's normal viewing. Summary of the invention

[0005] The exemplary embodiments of the present application provide a human eye protection method and laser device for a laser device, which are used to solve the problem in the related art that the detection sensitivity is high, the human eye protection function is easily triggered when the user approaches or passes by the projection device at a long distance, the judgment accuracy is low, and the human eye protection function is frequently triggered, causing the screen to turn off, affecting the user's normal viewing.

[0006] In a first aspect, an embodiment of the present application provides a method for protecting human eyes of a laser device, comprising:

[0007] Acquire detection signals of a plurality of consecutive reading cycles, wherein the detection signals include a first flag bit and a second flag bit, and the detection signals are obtained according to the infrared detection signal;

[0008] determining, according to the first flag bit, a state of the user in the plurality of reading cycles, the state being far away from the laser device or close to the laser device;

[0009] For any detection signal, determine the signal strength value of the detection signal according to the second flag bit;

[0010] If the state is close to the laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

[0011] In a possible implementation, if the state is close to the laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, then triggering a human eye protection function includes:

[0012] Determining a change rate of the signal strength according to the signal strength values ​​corresponding to the plurality of reading cycles;

[0013] Get the preset intensity threshold;

[0014] If the change speed is greater than or equal to a preset speed threshold, reducing the preset intensity threshold according to a preset ratio to obtain a first intensity threshold;

[0015] If the state is close to the laser device, and there is a signal strength value greater than or equal to the first intensity threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

[0016] In a possible implementation manner, obtaining a preset intensity threshold includes:

[0017] determining a user mode according to a signal strength value corresponding to a target reading cycle, wherein the user mode is an adult mode or a child mode, and the target reading cycle is at least one reading cycle among the multiple reading cycles;

[0018] The preset intensity threshold is determined according to the user mode.

[0019] In a possible implementation manner, determining the preset intensity threshold according to the user mode includes:

[0020] If the user mode is the adult mode, determining the preset intensity threshold to be a second intensity threshold;

[0021] If the user mode is the child mode, determining that the preset intensity threshold is a third intensity threshold;

[0022] The second intensity threshold is greater than the third intensity threshold.

[0023] In a possible implementation, the method further includes:

[0024] After the human eye protection function is triggered, if it is detected that the user is away from the laser device, the preset intensity threshold is increased according to a preset ratio;

[0025] According to the increased preset intensity threshold, the laser is turned on to restore the display image.

[0026] In a second aspect, an embodiment of the present application provides a laser device, comprising: a signal output component and a display control component; the signal output component is used to process an infrared detection signal detected within a preset range of an environment where the laser device is located;

[0027] The signal output component is used to send a detection signal of a plurality of continuous reading cycles to the display control component, wherein the detection signal is obtained according to the infrared detection signal, and the detection signal includes a first flag bit and a second flag bit;

[0028] The display control component is used for:

[0029] Determining the state of the user in the plurality of reading cycles according to the first flag, the state being far away from the laser device or close to the display device;

[0030] For any detection signal, determine the signal strength value of the detection signal according to the second flag bit;

[0031] If the state is close to the laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

[0032] In a possible implementation, the signal output component further includes: a detection component, a filter, an amplifier, an oscillator, an ADC, and a voltage stabilization circuit;

[0033] The detection component is connected to the filter; the filter is connected to the amplifier; the amplifier is connected to the ADC; the ADC is respectively connected to the display control component, the oscillator and the voltage stabilizing circuit;

[0034] The detection component is used to detect the infrared detection signal and send the infrared detection signal to the filter;

[0035] The filter is used to filter the infrared detection signal to obtain a first signal;

[0036] The amplifier is used to amplify the first signal to obtain a second signal;

[0037] The ADC is used for:

[0038] The second signal is processed to obtain detection signals of the multiple read cycles, and the detection signals of the multiple read cycles are sent to the display control component.

[0039] In a possible implementation, the detection component includes at least one dual-element sensitive element; the dual-element sensitive element is located on a side close to a light outlet of the laser;

[0040] The dual-element sensitive element comprises a first sensitive element and a second sensitive element, wherein the first sensitive element and the second sensitive element are respectively connected to the filter;

[0041] Accordingly, the ADC is specifically used for:

[0042] determining a first movement direction of the user between the first sensitive element and the second sensitive element according to the second signal;

[0043] Determining the first flag position according to the first movement direction;

[0044] For any one reading cycle, a second flag bit in the detection signal corresponding to the reading cycle is determined according to the second signal of the reading cycle.

[0045] In a possible implementation, the first sensitive element and the second sensitive element are located side by side at different heights on a side close to the light outlet of the laser;

[0046] The height of the first sensitive element is greater than the height of the second sensitive element;

[0047] The ADC is specifically used for:

[0048] If the first movement direction is a transverse movement of the user from the first sensitive element to the second sensitive element, then determining that the state is approaching the laser device;

[0049] If the first movement direction is a transverse movement of the user from the second sensitive element to the first sensitive element, the state is determined to be away from the laser device.

[0050] In a possible implementation, the detection signal is represented by a binary number; the detection signal includes a first bit number, a second bit number, and a third bit number;

[0051] The first bit number is the first n binary digits of the detection signal, which are used as a guide code, wherein n is an integer greater than or equal to 1;

[0052] The third bit number is the last binary number of the detection signal, serving as a cutoff code of the detection signal in a reading cycle;

[0053] The second bit number includes the first flag bit and the second flag bit, the first flag bit is the first binary number in the second bit number, and the second flag bit is the binary number in the second bit number except the first binary number.

[0054] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer program instructions are stored. When the computer program instructions are executed, the human eye protection method of the laser device as described in the first aspect of the present application is implemented.

[0055] In a fourth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the human eye protection method of the laser device as described in the first aspect of the present application.

[0056] The present application provides a human eye protection method for laser equipment and a laser equipment. The detection signals of multiple continuous reading cycles are obtained by processing the detection signals according to the infrared detection signals. The detection signals include a first flag bit and a second flag bit. According to the first flag bit, the state of the user in multiple reading cycles is determined. For any detection signal, according to the second flag bit, the signal strength value of the detection signal is determined. If the state is close to the laser equipment, and there is a signal strength value greater than or equal to the preset intensity threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered. The human eye protection function can be used to turn off the laser of the laser equipment. The present application improves the accuracy of judgment by judging whether the human eye protection function is triggered based on the user's state and signal strength, which can reduce the possibility of turning off the screen due to frequent triggering of the human eye protection function, and improve the user's viewing experience.

[0057] These and other aspects of the present application will become more apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0059] Figure 1 A schematic diagram of an application scenario applicable to the present application;

[0060] Figure 2 A schematic diagram of the structure of a laser device provided in an embodiment of the present application;

[0061] Figure 3 The waveform diagram of the detection signal of the example of this application;

[0062] Figure 4 A schematic diagram of a binary number of a detection signal according to an example of the present application;

[0063] Figure 5A schematic diagram of the structure of another laser device provided in an embodiment of the present application;

[0064] Figure 6 This is a schematic diagram of the structure of a dual-element sensitive element used as an example in this application;

[0065] Figure 7 A schematic diagram of a first movement direction of an example of the present application;

[0066] Figure 8 A schematic diagram of signal strength values ​​corresponding to multiple read cycles of the present application example;

[0067] Fig.9A A schematic diagram of a child and an adult within the detection range of the detection component 2012;

[0068] Fig. 9B Schematic diagram of the signal strength corresponding to children and adults;

[0069] Fig.10 A schematic diagram of a process flow of a human eye protection method for a laser device provided in an embodiment of the present application;

[0070] Fig.11 A schematic diagram of a process flow of another method for protecting human eyes of a laser device provided in an embodiment of the present application;

[0071] Fig.12 A schematic diagram of a process flow of another method for protecting human eyes of a laser device provided in an embodiment of the present application;

[0072] Fig.13 A schematic diagram of the structure of a laser device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0073] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0074] Based on the exemplary embodiments described in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the claims attached to this application. In addition, although the disclosure in this application is introduced according to one or several exemplary examples, it should be understood that each aspect of the disclosure can also constitute a complete implementation method separately.

[0075] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0076] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise indicated. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, for example, they can be implemented according to orders other than those given in the diagrams or descriptions of the embodiments of this application.

[0077] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0078] At present, the human eye protection function of the projection equipment is activated by receiving the trigger signal through the pyroelectric sensor, converting it into a weak electrical signal, using an operational amplifier to amplify the weak electrical signal, and outputting the signal to the transistor through a comparator, converting it into a pulse signal. The MCU determines whether to trigger the human eye protection function based on the number of pulses per unit time.

[0079] However, the output signal of the above method is only a pulse signal, which cannot determine the signal strength, the user's movement direction, etc., and is prone to misjudgment. For example, when the user is away from the laser device, if the number of pulses in the process meets the conditions for triggering the human eye protection function, the human eye protection function is triggered and the laser is turned off, which will cause a misjudgment and affect the user's normal viewing. In addition, the determination of whether to trigger the human eye protection function is based on the number of pulses, which makes the detection sensitivity high. When the user approaches or passes by the projection device at a long distance, the human eye protection function is easily triggered, and the judgment accuracy is low. Frequent triggering of the human eye protection function causes the screen to turn off, affecting the normal viewing of the viewer. Moreover, the judgment condition can only change the number of pulses per unit time, and cannot be changed according to different user needs (for example, whether the user is an adult or a child, the speed of the user's movement, etc.).

[0080] Therefore, the present application provides a human eye protection method for laser equipment. By acquiring detection signals of multiple continuous reading cycles, the user's state in multiple reading cycles (far away from the display device, or close to the display device) can be judged according to the detection signals, so as to determine whether to trigger the human eye protection function according to the state and the signal strength value of the detection signal. This improves the accuracy of the judgment, reduces the possibility of frequently triggering the human eye protection function and causing the screen to turn off, and improves the user's viewing experience.

[0081] For ease of understanding, the following Figure 1 The examples are used to illustrate the application scenarios to which the embodiments of the present application are applicable.

[0082] Figure 1 A schematic diagram of an application scenario applicable to this application, such as Figure 1 As shown in FIG. 1 , the laser device may include a housing 00 and a display screen 02 .

[0083] The laser device is used to project an image beam to the display screen 02 to display a projection picture on the display screen 02 .

[0084] The detection signal reflected by the target object 01 may be an infrared detection signal, and the laser device may perform signal processing based on the infrared detection signal to obtain detection signals of multiple continuous reading cycles for determining whether to turn on the human eye protection function.

[0085] Figure 1 The state of the target object 001 in the example is close to the laser device. At this time, since the human eye can easily enter the range of the laser light outlet, it is easy to cause damage to the human eye. The laser device needs to identify the state of the target object 001 to trigger the human eye protection function, that is, turn off the laser and stop emitting light.

[0086] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments may exist independently or in combination with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0087] Figure 2 A schematic diagram of the structure of a laser device provided in an embodiment of the present application, referring to Figure 2 The laser device 20 includes a signal output component 201 and a display control component 202 .

[0088] Among them, the signal output component 201 is used to process the infrared detection signal detected within a preset range of the environment where the laser device is located, and the display control component 202 is used to determine whether to trigger the human eye protection function based on the detection signal input by the signal output component 201.

[0089] In a possible implementation, the display control component 202 may include an MCU, that is, the display control component 202 may determine whether to trigger the human eye protection function through the MCU.

[0090] It can be understood that the laser device 20 also includes a power supply 203 and a laser 204 .

[0091] The signal output component 201 is used to send a plurality of continuous reading cycle detection signals to the display control component 202, wherein the detection signal output component 201 processes the detected infrared detection signal. For example, the waveform of the detection signal can be as follows: Figure 3 shown.

[0092] In one possible implementation, the detection signal can be represented in binary form, and the detection signal includes a first flag bit and a second flag bit, wherein the first flag bit is used to indicate the user's movement direction, that is, the state of the user in multiple reading cycles, which state is far away from the laser device 20 or close to the laser device 20, and the second flag bit can be used to indicate the signal strength of the detection signal, wherein the signal strength is used to express the distance from the user to the laser device. For example, the larger the signal strength, the smaller the distance from the user to the laser device 20.

[0093] In one possible implementation, the detection signal of a read cycle may include a first bit number, a second bit number, and a third bit number, the first bit number being the first n binary numbers of the detection signal serving as a guide code, the third bit number being the last binary number of the detection signal serving as a cutoff code for the detection signal of a read cycle, the second bit number including a first flag bit and a second flag bit, the first flag bit being the first binary number in the second bit number, and the second flag bit being the binary number in the second bit number other than the first binary number.

[0094] Exemplarily, the detection signal acquired by the display control component 202 in a reading cycle can be represented by a 19-bit binary number, such as Figure 4 As shown, Figure 4 The 18th and 17th bits are the first bit number, the 0th bit is the third bit number, and the 1st to 16th bits are the second bit number. In the second bit number, for example, the 16th bit can be the first flag bit, and the 1st to 15th bits can be the second flag bit.

[0095] For example, the detection signals of two consecutive reading cycles are: 0000000000000001110, 00000000000000000010, and the second bit number of the detection signal 0000000000000001110 is: 0000000000000111, in which the first flag bit is 0, which means that the user is away from the laser device 20, and the second flag bit is 00000000000111, which means that the signal strength of the detection signal is 7. The second bit number of the detection signal 0000000000000000010 is 0000000000000001, and the first flag bit is 0, which means that the user is away from the laser device 20, and the second flag bit is 000000000000001, which means that the signal strength of the detection signal is 2. It should be understood that the numbers here are only used to intuitively indicate the size of the signal strength, for example, 7 is greater than 2.

[0096] The display control component 202 is used to:

[0097] According to the first flag bit, the state of the user in a plurality of reading cycles is determined, and the state is either far away from the laser device 20 or close to the laser device 20 .

[0098] According to the second flag bit, signal strength values ​​of the plurality of detection signals are determined.

[0099] If the state is close to the laser device 20, and there is a signal strength value greater than or equal to the preset strength threshold among the signal strength values ​​of the multiple detection signals.

[0100] This indicates that the user is too close to the laser device 20 , which may cause damage to the human eyes. In this case, the human eye protection function may be triggered. The human eye protection function is used to turn off the laser 204 of the laser device 20 .

[0101] That is to say, as the user approaches the laser device 20, the distance between the user and the laser device 20 is reduced, the received infrared detection signal will be enhanced, and the signal strength of the output detection signal will also be enhanced. After reaching the preset intensity threshold, the human eye protection function will be triggered to turn off the laser 240.

[0102] However, after the user approaches the laser device 20 and causes the laser 240 to be turned off, when the user moves away from the laser device 20, the laser device 20 can turn on the laser 240 and restore the display image.

[0103] In a possible implementation, a reading cycle includes multiple clock cycles, and the display control component 202 reads the detection signal according to the following timing sequence:

[0104] (1) After the laser device 20 is turned on, the signal output component 201 starts to power on. When starting to work, the display control component 202 pulls up the level of the connection line (Out line) between the display control component 202 and the signal output component 201 and maintains it for at least two clock cycles.

[0105] (2) After the high level is maintained for at least two clock cycles, the display control component 202 pulls the level of out down to a low level and maintains it for at least 200 ns (nanoseconds).

[0106] (3) Generate a rising edge on the out line and maintain the high level for at least 200ns.

[0107] (4) Start reading data from the highest bit, repeat steps (2) and (3) to read the lowest bit of data.

[0108] (5) After the reading is completed, the display control component 202 controls the out line to be at a low level and maintains it for at least 64 clock cycles to complete the data update.

[0109] (6) Start a new reading cycle.

[0110] It should be noted that due to the user's movement inertia, when the user approaches the laser device 20, the first flag bits in the detection signals corresponding to multiple reading cycles are generally consistent, or, among the detection signals corresponding to multiple reading cycles, the first flag bits of most detection signals are consistent. The user's status in multiple reading cycles can be determined based on the signal flag bits.

[0111] In this embodiment, the laser device 20 includes a signal output component 201 and a display control component 202. The signal output component is used to process the infrared detection signal detected within a preset range of the environment where the laser device is located. The signal output component 201 is used to send a detection signal of multiple continuous reading cycles to the display control component 202. The detection signal includes a first flag and a second flag. The display control component 202 is used to determine the state of the user in multiple reading cycles according to the first flag, and determine the signal strength value according to the second flag. If the state is close to the laser device, and there is a signal strength value greater than or equal to the preset intensity threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered. The present application outputs continuous detection signals through ADC, so that the display control component 202 can judge whether the human eye protection function is triggered based on the user's state and signal strength, thereby improving the accuracy of the judgment, reducing the possibility of turning off the screen due to frequent triggering of the human eye protection function, and improving the user's viewing experience.

[0112] Next, combine Figure 5 , another laser device provided in this application is described.

[0113] Figure 5 A schematic diagram of another laser device provided in an embodiment of the present application, referring to Figure 5 The laser device 20 includes a signal output component 201 and a display control component 202 .

[0114] In a possible implementation, the signal output component 201 may include an analog-to-digital converter (ADC) 2011 , and the signal output component 201 is connected to the display control component 202 via the ADC 2011 .

[0115] The signal output component 201 further includes: a detection component 2012 , a filter 2013 , an amplifier 2014 , an oscillator 2015 , and a voltage stabilizing circuit 2016 .

[0116] Among them, the detection component 2012 is connected to the filter 2013, the filter 2013 is connected to the amplifier 2014, the amplifier 2014 is connected to the ADC 2011, and the ADC 2011 is connected to the display control component 202, the oscillator 2015 and the voltage stabilizing circuit 2016 respectively.

[0117] Exemplarily, the amplifier 2014 may be a triode.

[0118] The detection component 2012 is used to detect the infrared detection signal and send the infrared detection signal to the filter 2013.

[0119] The filter 2013 is used to filter the infrared detection signal to obtain a first signal.

[0120] The amplifier 2014 is used to amplify the first signal to obtain a second signal.

[0121] ADC2011 is specifically used for:

[0122] The second signal is processed to obtain detection signals of multiple read cycles, and the detection signals of multiple read cycles are sent to the display control component 202.

[0123] The display control component 202 is specifically used to determine whether to trigger the human eye protection function according to the detection signals of multiple reading cycles. The specific description can refer to the above embodiment and will not be repeated here.

[0124] It can be understood that the detection signal obtained after being processed by ADC2011 can be a digital signal, so that the subsequent display control component 202 can directly determine whether to trigger the human eye protection function based on the digital signal.

[0125] In a possible implementation, the signal output component 201 directly sends the infrared detection signal to the display control component 202. The display control component 202 may include an ADC. The display control component 202 may process the infrared detection signal through the ADC to obtain a detection signal.

[0126] In a possible implementation, the detection component 2012 includes at least one dual-element sensitive element, and the dual-element sensitive element is located on a side close to the light outlet of the laser 204. Figure 5 In the figure, only one binary sensitive element is shown. Figure 1 In the example, there are two binary sensitive elements, and the binary results of the binary sensitive elements are as follows Figure 6 shown.

[0127] Among them, for each binary sensitive element, the binary sensitive element includes a first sensitive element and a second sensitive element, and the first sensitive element and the second sensitive element are respectively connected to the filter 2013.

[0128] ADC2011 is specifically used for:

[0129] A first movement direction of the user between the first sensitive element and the second sensitive element is determined according to the second signal.

[0130] According to the first movement direction, a first flag position is determined.

[0131] For any read cycle, the second flag bit in the detection signal corresponding to the read cycle is determined according to the second signal of the read cycle.

[0132] Exemplarily, ADC2011 may sample the second signal in a reading cycle, and determine the second flag bit of the detection signal corresponding to the reading cycle according to the second signal.

[0133] In one possible implementation, in order to determine the user's movement direction, the first sensitive element and the second sensitive element can be located side by side at different heights on a side close to the light outlet of the laser. In the plane where the first sensitive element, the second sensitive element and the light outlet of the laser are located, the height of the first sensitive element is different from the height of the second sensitive element. For example, the height of the first sensitive element is greater than the height of the second sensitive element.

[0134] Accordingly, ADC2011 is specifically used for:

[0135] For example, Figure 7 As shown, Figure 7It is a schematic diagram of the first sensitive element and the second sensitive element on one side of the laser outlet of the laser device, which can be a top view of the laser device 20. When the first movement direction is a transverse movement of the user from the first sensitive element to the direction of the second sensitive element, it is determined that the user is away from the laser device 20, and ADC2011 can determine that the first flag is 0. When the first movement direction is a transverse movement of the user from the second sensitive element to the direction of the first sensitive element, it is determined that the user is close to the laser device 20, and ADC2011 can determine that the first flag is 1.

[0136] It can be understood that the above-mentioned first flag is only an example. When it is determined that the user is away from the laser device 20, the first flag can be determined to be 1. When the user approaches the laser device 20, ADC2011 can determine that the first flag is 0. This application does not impose any restrictions on this.

[0137] In this embodiment, the laser device 20 includes a signal output component 201 and a display control component 202. The signal output component 201 includes: a detection component 2012, a filter 2013, an amplifier 2014, an oscillator 2015, an ADC 2011 and a voltage stabilizing circuit 2016. The detection component 2012 is used to detect an infrared detection signal and send the infrared detection signal to the filter 2013. The filter 2013 is used to filter the infrared detection signal to obtain a first signal. The amplifier 2014 is used to amplify the first signal to obtain a second signal. The ADC 2011 is used to process the second signal to obtain detection signals of multiple reading cycles, and send the detection signals of multiple reading cycles to the display control component 202. The display control component 202 is specifically used to determine whether to trigger the human eye protection function according to the detection signals of multiple reading cycles.

[0138] When determining whether to trigger the human eye protection function, the display control component 202 can combine the actual scenario, for example, considering the user's movement speed. When the user moves faster, if the display control component 202 fails to trigger the human eye protection function in time, the user's eyes are easily exposed to laser.

[0139] In some embodiments, the display control component 202 may consider the user's movement speed when determining whether to trigger the human eye protection function.

[0140] In a possible implementation, the display control component 202 is specifically used for:

[0141] According to the signal strength values ​​corresponding to multiple reading cycles, the changing speed of the signal strength is determined, and the preset strength threshold is obtained. If the changing speed is greater than or equal to the preset speed threshold, it means that the user is moving faster. The preset strength threshold can be reduced according to a preset ratio to obtain a first intensity threshold. If the state is close to the laser device, it can be determined whether there is a signal strength value greater than or equal to the first intensity threshold among the signal strength values ​​of the multiple detection signals.

[0142] For example, for the changes in the signal strength values ​​corresponding to multiple reading cycles, reference may be made to Figure 8 , Figure 8 The horizontal axis is the signal strength value, and the vertical axis represents the time axis. Figure 8 The curve in is determined by values ​​corresponding to a plurality of read cycles. The value corresponding to each read cycle can be determined according to a detection signal corresponding to the read cycle. Specifically, the value corresponding to the read cycle can be determined according to a second flag bit in the detection signal.

[0143] For example, from Figure 8 As can be seen in the figure, the greater the slope of the curve, the faster the signal strength changes, that is, the faster the user moves. The human eye will enter the range of the laser light outlet more quickly. By reducing the preset intensity threshold, the human eye protection function can be triggered in advance to turn off the laser 204 to protect the eyes from being irradiated by the laser.

[0144] Specifically, the display control component 202 is also used for:

[0145] After the human eye protection function is triggered, if it is detected that the user is away from the laser device 20, the preset intensity threshold can be increased according to a preset ratio so that the human eye protection function is not easily triggered. The laser 240 can be turned on according to the increased preset intensity threshold to restore the display image.

[0146] In this embodiment, when the display control component 202 receives the detection signal of the subsequent reading cycle, it determines that the user is away from the laser device 20 based on the detection signal, and turns on the laser 240 based on the increased preset intensity threshold to restore the display image. When the user approaches the laser device 20 again, the signal strength is not likely to reach the increased preset intensity threshold, so that the image can be displayed more stably and the viewing effect can be guaranteed.

[0147] Furthermore, the situations of different users can be considered. For adults, their self-protection awareness is mature, and they pay more attention to the viewing experience of the product when using it. Therefore, in adult mode, the preset intensity threshold can be set higher to reduce the sensitivity of detection and reduce the possibility of false triggering of the human eye protection function. For children, their self-protection awareness is not strong, so it is necessary to strengthen their protection measures. The preset intensity threshold can be set lower than that of adults, thereby improving the sensitivity of detection and achieving safety protection for children.

[0148] For example, Fig.9A As shown, Fig.9A Schematic diagram of children and adults within the detection range of the detection component 2012. Fig.9A It can be seen that children are relatively closer to the detection component 2012 than adults within the detection range, that is, children are relatively closer to the laser device 20, so the signal strength of the corresponding detection signal generated by the children is higher. Fig. 9B Waveform diagram of .

[0149] In some embodiments, the display control component 202 may store preset strength thresholds corresponding to different user modes. The display control component 202 may determine the user mode based on the signal strength value corresponding to the target reading cycle. The user mode is adult mode or child mode, and the target reading cycle is at least one reading cycle among multiple reading cycles.

[0150] Exemplarily, the target reading cycle may be the last m reading cycles among multiple reading cycles, where m is an integer greater than or equal to 1. The display control component 202 may determine the user mode based on the signal strength values ​​of the m reading cycles. For example, when the signal strength values ​​of the m reading cycles are all greater than or equal to the strength threshold for mode selection, the user mode may be determined to be the child mode. If any one of the signal strength values ​​of the m reading cycles is less than the strength threshold, the user mode may be determined to be the adult mode.

[0151] In another example, when any one of the signal strength values ​​of the m reading cycles is greater than or equal to the strength threshold, it can be determined that the user mode is child mode; if the signal strength values ​​of the m reading cycles are all less than the strength threshold, it can be determined that the user mode is adult mode.

[0152] It can be understood that in the above two examples, the target reading cycle is only an example, and the target reading cycle can also be multiple reading cycles, which is not limited in this application. Moreover, the determination methods in the above two examples are only two possible implementation methods, and other methods can also be used. For example, if the signal strength values ​​of m reading cycles are greater than or equal to the strength threshold, the user mode is determined to be the child mode. If the signal strength values ​​of m reading cycles are less than the strength threshold, the user mode can be determined to be the adult mode. This application does not limit this.

[0153] In a possible implementation, the display control component 202 is specifically used for:

[0154] If the user mode is the adult mode, the preset intensity threshold is determined to be the second intensity threshold; if the user mode is the child mode, the preset intensity threshold is determined to be the third intensity threshold, wherein the second intensity threshold is greater than the third intensity threshold.

[0155] In this embodiment, the display control component 202 can control the sensitivity of the detection through different user modes to improve the accuracy of determining whether the human eye protection function is triggered. In the adult mode, the preset intensity threshold can be set higher to reduce the sensitivity of the detection, reduce the possibility of false triggering of the human eye protection function, and improve the viewing experience. In the child mode, the sensitivity of the detection is improved to achieve safety protection for children.

[0156] Fig.10 A schematic diagram of a human eye protection method for a laser device provided in an embodiment of the present application. The execution subject may be a laser device 20, referring to Fig.10 , including the following steps:

[0157] S1001. Acquire detection signals of multiple consecutive read cycles, where the detection signals include a first flag bit and a second flag bit.

[0158] The detection signal is obtained based on the infrared detection signal.

[0159] S1002. Determine the state of the user in a plurality of reading cycles according to the first flag bit, the state being far away from the laser device or close to the laser device.

[0160] S1003: For any detection signal, determine the signal strength value of the detection signal according to the second flag bit.

[0161] S1004: If the state is close to a laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

[0162] Exemplarily, the human eye protection function can be used to turn off the laser of a laser device, or can also be used to project a black picture card onto a projection screen to prevent the laser from causing damage to the user's eyes.

[0163] For the specific implementation of the above method steps, reference may be made to the above embodiments, which will not be described in detail here.

[0164] In this embodiment, the laser device can obtain a detection signal of a continuous reading cycle, and the detection signal includes a first flag bit and a second flag bit. According to the first flag bit, the state of the user in multiple reading cycles is determined. For any detection signal, the signal strength value of the detection signal is determined according to the second flag bit. If the state is close to the laser device, and there is a signal strength value greater than or equal to a preset intensity threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered. By judging whether the human eye protection function is triggered based on the user's state and signal strength, the accuracy of the judgment is improved, the possibility of frequently triggering the human eye protection function and causing the screen to turn off can be reduced, and the user viewing experience is improved.

[0165] Next, through Fig.11 Another method for protecting human eyes of laser equipment provided in this application is described.

[0166] Fig.11 A schematic diagram of a process flow of another human eye protection method of a laser device provided in an embodiment of the present application. The execution subject may be a laser device 20, referring to Fig.11 , including the following steps:

[0167] S1101. Determine a user mode according to a signal strength value corresponding to a target read cycle.

[0168] The user mode is an adult mode or a child mode, and the target reading cycle is at least one reading cycle among the multiple reading cycles.

[0169] S1102: Determine whether the user mode is the adult mode.

[0170] If yes, execute S1103, if no, execute S1108.

[0171] S1103: Obtain a second intensity threshold.

[0172] S1104. Determine, based on the first flag bit, whether the user is in proximity to the laser device during a plurality of reading cycles.

[0173] If yes, then S1105 is executed. If no, it indicates that the state is far away from the laser device, and no operation may be performed to keep the screen display of the laser device.

[0174] S1105: For any detection signal, determine the signal strength value of the detection signal according to the second flag bit.

[0175] S1106: Determine whether there is a signal strength value greater than or equal to a second strength threshold among the signal strength values ​​of the multiple detection signals.

[0176] If yes, execute S1107.

[0177] S1107. Trigger the human eye protection function.

[0178] S1108. Obtain a third intensity threshold.

[0179] S1109. Determine, based on the first flag bit, whether the user is in proximity to the laser device during a plurality of reading cycles.

[0180] If yes, then S1110 is executed. If no, it indicates that the state is far away from the laser device, and no operation may be performed to keep the screen display of the laser device.

[0181] S1110. For any detection signal, determine a signal strength value of the detection signal according to the second flag bit.

[0182] S1111. Determine whether there is a signal strength value greater than or equal to a third strength threshold among the signal strength values ​​of the multiple detection signals.

[0183] If yes, execute S1107.

[0184] In this embodiment, the implementation method and technical effect are similar, and this embodiment will not be repeated here.

[0185] Further, based on the above embodiment, taking the user mode as the adult mode as an example, the intensity threshold corresponding to the adult mode is the second intensity threshold. Fig.12 Another method for protecting human eyes of laser equipment provided in this application is described.

[0186] Fig.12 A schematic diagram of a process flow of another human eye protection method for a laser device provided in an embodiment of the present application, wherein the execution subject may be a laser device 20, referring to Fig.12 , including the following steps:

[0187] S1201. Obtain a second intensity threshold.

[0188] S1202: Determine, based on the first flag bit, whether the user is in proximity to the laser device during a plurality of reading cycles.

[0189] If yes, then S1203 is executed. If no, it indicates that the state is far away from the laser device, and no operation may be performed to keep the screen display of the laser device.

[0190] S1203: Determine whether the change speed of the signal strength is greater than or equal to a preset speed threshold.

[0191] If yes, execute S1204, if no, execute 1208.

[0192] S1204: Reduce the second intensity threshold according to a preset ratio to obtain a reduced intensity threshold.

[0193] S1205: For any detection signal, determine the signal strength value of the detection signal according to the second flag bit.

[0194] S1206: Determine whether there is a signal strength value greater than or equal to the reduced strength threshold value among the signal strength values ​​of the multiple detection signals.

[0195] If so, execute S1207.

[0196] S1207. Trigger the human eye protection function.

[0197] S1208. For any detection signal, determine the signal strength value of the detection signal according to the second flag bit.

[0198] S1209: Determine whether there is a signal strength value greater than or equal to a second strength threshold among the signal strength values ​​of the multiple detection signals.

[0199] If so, execute S1207.

[0200] In this embodiment, the implementation method and technical effect are similar, and this embodiment will not be repeated here.

[0201] Fig.13 The laser device 300 includes at least one of a display control component 310 , a communicator 320 , a tuner and demodulator 330 , an external device interface 340 , an audio output interface 350 , a memory 360 , a power supply 370 , and a user interface 380 .

[0202] In one possible implementation, the display control component 310 may include at least one of an MCU, a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a RAM Random Access Memory (RAM), a ROM (Read-Only Memory, ROM), a first interface to an nth interface for input / output, a communication bus (Bus), etc.

[0203] In a possible implementation, the communicator 320 is a component for communicating with an external device or server according to various communication protocol types. For example, the communicator 320 may include at least one of a wireless fidelity (WIFI) module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The laser device 300 may establish transmission and reception of control signals and data signals with an external control device or server through the communicator 320.

[0204] In a possible implementation, the tuner demodulator 330 receives broadcast television signals via wired or wireless reception, and demodulates audio and video signals, such as Electronic Program Guide (EPG) data signals, from a plurality of wireless or wired broadcast television signals.

[0205] In a possible implementation, the external device interface 340 may include, but is not limited to, any one or more of the following interfaces: a high definition multimedia interface (HDMI), an analog or digital high definition component input interface (component), a composite video input interface (CVBS), a universal serial bus (USB), a red green blue (RGB) color mode port, etc. It may also be a composite input / output interface formed by the above multiple interfaces.

[0206] In a possible implementation, the audio output interface 350 is an interface for outputting audio information. The audio output interface may include but is not limited to the following: a microphone interface, an earphone interface, and the like.

[0207] In a possible implementation, the display control component 310 controls the operation of the laser device 300 and responds to the user's operation through various software control programs stored in the memory 360. The display control component 310 controls the overall operation of the laser device 300.

[0208] In a possible implementation, the display control component 310 includes a television system integrated circuit (Television System on Chip, TV SOC) and an application specific integrated circuit (Application Specific Integrated Circuit, ASIC).

[0209] The laser device provided in the embodiment of the present application can be used to execute any of the above method embodiments. The specific implementation method and technical effects are similar and will not be repeated here.

[0210] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, a human eye protection method for a laser device as in any of the above method embodiments is implemented. The specific implementation method and technical effect are similar and will not be repeated here.

[0211] An embodiment of the present application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium. When the at least one processor executes the computer program, the human eye protection method of the laser device in any of the above method embodiments can be implemented. The specific implementation method and technical effect are similar and will not be repeated here.

[0212] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0213] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A method for protecting human eyes of laser equipment, characterized in that: The method comprises: Acquire detection signals of a plurality of consecutive reading cycles, wherein the detection signals include a first flag bit and a second flag bit, and the detection signals are obtained according to the infrared detection signal; determining, according to the first flag bit, a state of the user in the plurality of reading cycles, the state being far away from the laser device or close to the laser device; For any detection signal, determine the signal strength value of the detection signal according to the second flag bit; If the state is close to the laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

2. The method according to claim 1, characterized in that If the state is close to the laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, triggering the human eye protection function includes: Determining a change rate of the signal strength according to the signal strength values ​​corresponding to the plurality of reading cycles; Get the preset intensity threshold; If the change speed is greater than or equal to a preset speed threshold, reducing the preset intensity threshold according to a preset ratio to obtain a first intensity threshold; If the state is close to the laser device, and there is a signal strength value greater than or equal to the first intensity threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

3. The method according to claim 2, characterized in that The step of obtaining a preset intensity threshold comprises: determining a user mode according to a signal strength value corresponding to a target reading cycle, wherein the user mode is an adult mode or a child mode, and the target reading cycle is at least one reading cycle among the multiple reading cycles; The preset intensity threshold is determined according to the user mode.

4. The method according to claim 3, characterized in that The determining the preset intensity threshold according to the user mode includes: If the user mode is the adult mode, determining the preset intensity threshold to be a second intensity threshold; If the user mode is the child mode, determining that the preset intensity threshold is a third intensity threshold; The second intensity threshold is greater than the third intensity threshold.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: After the human eye protection function is triggered, if it is detected that the user is away from the laser device, the preset intensity threshold is increased according to a preset ratio; According to the increased preset intensity threshold, the laser is turned on to restore the display image.

6. A laser device, characterized in that: include: A signal output component and a display control component; the signal output component is used to process the infrared detection signal detected within a preset range of the environment where the laser device is located; The signal output component is used to send a detection signal of a plurality of continuous reading cycles to the display control component, wherein the detection signal is obtained according to the infrared detection signal, and the detection signal includes a first flag bit and a second flag bit; The display control component is used for: determining, according to the first flag bit, a state of the user in the plurality of reading cycles, the state being far away from the laser device or close to the laser device; For any detection signal, determine the signal strength value of the detection signal according to the second flag bit; If the state is close to the laser device, and there is a signal strength value greater than or equal to a preset strength threshold among the signal strength values ​​of the multiple detection signals, the human eye protection function is triggered.

7. The laser device according to claim 6, characterized in that The signal output component includes: a detection component, a filter, an amplifier, an oscillator, an analog-to-digital converter ADC and a voltage stabilizing circuit; The detection component is connected to the filter; the filter is connected to the amplifier; the amplifier is connected to the ADC; the ADC is respectively connected to the display control component, the oscillator and the voltage stabilizing circuit; The detection component is used to detect the infrared detection signal and send the infrared detection signal to the filter; The filter is used to filter the infrared detection signal to obtain a first signal; The amplifier is used to amplify the first signal to obtain a second signal; The ADC is used for: The second signal is processed to obtain detection signals of the multiple read cycles, and the detection signals of the multiple read cycles are sent to the display control component.

8. The laser device according to claim 7, characterized in that The detection component includes at least one dual-element sensitive element; the dual-element sensitive element is located on a side close to the light outlet of the laser; The dual-element sensitive element comprises a first sensitive element and a second sensitive element, wherein the first sensitive element and the second sensitive element are respectively connected to the filter; Accordingly, the ADC is specifically used for: determining, according to the second signal, a first movement direction of the user between the first sensitive element and the second sensitive element; Determining the first flag position according to the first movement direction; For any one reading cycle, a second flag bit in the detection signal corresponding to the reading cycle is determined according to the second signal of the reading cycle.

9. The laser device according to claim 8, characterized in that The first sensitive element and the second sensitive element are located side by side at different heights on one side close to the light outlet of the laser; The height of the first sensitive element is greater than the height of the second sensitive element; The ADC is specifically used for: If the first movement direction is a transverse movement of the user from the first sensitive element to the second sensitive element, then determining that the state is approaching the laser device; If the first movement direction is a transverse movement of the user from the second sensitive element to the first sensitive element, the state is determined to be away from the laser device.

10. The laser device according to any one of claims 6 to 9, characterized in that: The detection signal is represented by a binary number; the detection signal includes a first bit number, a second bit number and a third bit number; The first bit number is the first n binary digits of the detection signal, which are used as a guide code, wherein n is an integer greater than or equal to 1; The third bit number is the last binary number of the detection signal, serving as a cutoff code of the detection signal in a reading cycle; The second bit number includes the first flag bit and the second flag bit, the first flag bit is the first binary number in the second bit number, and the second flag bit is the binary number in the second bit number except the first binary number.

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