Laser light source heating and protecting device and method and lamp

Abstract

The invention discloses a laser light source heating and protecting device and method and a lamp, and the device comprises a temperature monitoring circuit which is used for collecting the current temperature of a laser; the color wheel motor rotating speed detection circuit is used for collecting the current rotating speed of the color wheel motor; the control unit is used for outputting a heater control signal according to the current temperature and outputting a module control signal according to the current rotating speed; the heater is used for preheating the laser light source module according to the heater control signal; and the constant-current driving circuit is used for driving the laser light source module according to the module control signal. The laser light source heating and protecting device is additionally arranged, the auxiliary light source performs preheating of low-temperature starting, meanwhile, whether the laser is within the temperature control range of the specification or not is monitored as a first protection mechanism, and whether the rotating speed of the color wheel motor reaches the specified rotating speed or not is monitored as a second protection mechanism, so that safe operation of the laser light source module can be guaranteed; the LED lamp control circuit can be widely applied to the technical field of lamp control.

Description

Technical Field

[0001] The present invention relates to the technical field of lamp control, and in particular to a laser light source heating and protection device, method and lamp. Background Art

[0002] Currently, the stage lighting industry is seeing a gradual rise in fixtures using laser light source modules as their light source. Compared to traditional light sources, laser light sources offer advantages such as high intensity, high brightness, focusability, high precision, high beam quality, good directionality, and good monochromaticity. However, they are relatively energy-inefficient, require high maintenance power and temperatures, and have a relatively short lifespan. A laser light source module consists of a laser, a reflector, a color wheel, and a motor. During normal operation, the laser beam passes through the reflector and out through the color wheel, which must be driven by a motor to rotate at high speed to prevent burns. Due to the added motor structure, the motor exhibits increased damping at low temperatures. In real-world use, if the ambient temperature falls below 0°C, some motors may fail to start or operate at insufficient speed. If the motor fails to start, the module cannot produce light. Forcing the color wheel to produce light at insufficient speed can overheat, causing deformation or even burnout, severely impacting performances. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a laser light source heating and protection device, method and lamp, which can ensure the safe operation of the laser light source module and increase its service life.

[0004] To achieve the above objectives, one aspect of an embodiment of the present application provides a laser light source heating and protection device, which is applied to a laser light source module. The laser light source module includes a laser and a color wheel motor, including:

[0005] A temperature monitoring circuit, used to collect the current temperature of the laser;

[0006] A color wheel motor speed detection circuit, used for collecting the current speed of the color wheel motor;

[0007] A control unit, wherein the output terminals of the temperature monitoring circuit and the color wheel motor speed detection circuit are both connected to the input terminal of the control unit, and are configured to output a heater control signal according to the current temperature and a module control signal according to the current speed;

[0008] a heater attached to the surface of the laser light source module, wherein the input end of the heater is connected to the first output end of the control unit and is used to preheat the laser light source module according to the heater control signal;

[0009] A constant current drive circuit, wherein the input end of the constant current drive circuit is connected to the second output end of the control unit, and the output end of the constant current drive circuit is connected to the input end of the laser light source module, and is used to drive the laser light source module according to the module control signal.

[0010] In some embodiments, the laser light source heating and protection device further comprises:

[0011] A heating drive circuit, wherein the input end of the heating drive circuit is connected to the first output end of the control unit, and the output end of the heating drive circuit is connected to the input end of the heater, and is used to drive the heater according to the heater control signal.

[0012] In some embodiments, the laser light source heating and protection device further comprises:

[0013] A level comparison logic output circuit, wherein the input end of the level comparison logic output circuit is connected to the output end of the temperature monitoring circuit, and the output end of the level comparison logic output circuit is connected to the input end of the control unit, and is used to output a level signal according to the current temperature and a preset temperature threshold.

[0014] In some embodiments, the laser light source heating and protection device further comprises:

[0015] An abnormal information display unit, wherein the input end of the abnormal information display unit is connected to the third output end of the control unit, and is used to display the current temperature, the current speed and the abnormal warning information output by the control unit.

[0016] To achieve the above objectives, another aspect of the present invention provides a laser light source heating and protection method, which is applied to a laser light source module. The laser light source module includes a laser and a color wheel motor, and includes the following steps:

[0017] collecting the current temperature of the laser through a temperature monitoring circuit;

[0018] The current speed of the color wheel motor is collected by a color wheel motor speed detection circuit;

[0019] Outputting a heater control signal according to the current temperature and a module control signal according to the current speed via a control unit;

[0020] preheating the laser light source module by a heater according to the heater control signal;

[0021] The laser light source module is driven according to the module control signal through a constant current driving circuit.

[0022] In some embodiments, the heater control signal includes a heating start signal and a heating shutoff signal, and the module control signal includes a module shutoff signal. The control unit outputs the heater control signal according to the current temperature and outputs the module control signal according to the current speed, specifically including:

[0023] Determine the speed threshold, temperature threshold and timing time;

[0024] Determine a voltage threshold value according to the temperature threshold value, and convert the current temperature into a current voltage value;

[0025] Determining, by the control unit, whether the current voltage value is greater than the voltage threshold;

[0026] When the current voltage value is greater than the voltage threshold, the heating start signal is output and timing is started;

[0027] Within the timing time, if the current voltage value is less than or equal to the voltage threshold and the current speed is greater than the speed threshold, the heating shutdown signal is output; if the current voltage value is greater than the voltage threshold, the heating start signal is output;

[0028] After the timing time, if the current voltage value is less than or equal to the voltage threshold, and the current speed is less than or equal to the speed threshold, the heating shutdown signal and the shutdown module signal are output; if the current voltage value is greater than the voltage threshold, the shutdown module signal is output.

[0029] In some embodiments, the laser light source heating and protection method further includes:

[0030] A level signal is output according to the current temperature and a preset temperature threshold value through a level comparison logic output circuit.

[0031] In some embodiments, the level signal includes a first level signal and a second level signal, and outputting the level signal according to the current temperature and a preset temperature threshold through the level comparison logic output circuit specifically includes:

[0032] determining the temperature threshold, and determining the voltage threshold according to the temperature threshold;

[0033] Converting the current temperature into a current voltage value;

[0034] Determining whether the current voltage value is greater than the voltage threshold by the level comparison logic output circuit;

[0035] When the current voltage value is greater than the voltage threshold, outputting the first level signal;

[0036] When the current voltage value is less than or equal to the voltage threshold, the second level signal is output.

[0037] In some embodiments, the heater control signal includes a heating start signal and a heating shutoff signal, and the module control signal includes a module shutoff signal. The control unit outputs the heater control signal according to the current temperature and outputs the module control signal according to the current speed, specifically including:

[0038] Determine the speed threshold and timing time;

[0039] determining, by the control unit, whether the level signal is the first level signal or the second level signal;

[0040] When the level signal is the first level signal, outputting the heating start signal and starting timing;

[0041] Within the timing time, if the level signal is the second level signal and the current speed is greater than the speed threshold, the heating shutdown signal is output; if the level signal is the first level signal, the heating start signal is output;

[0042] After the timing time, if the level signal is the second level signal and the current speed is less than or equal to the speed threshold, the heating shutdown signal and the shutdown module signal are output; if the level signal is the first level signal, the shutdown module signal is output.

[0043] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application provides a lamp, comprising a laser light source module, wherein the laser light source module is driven by the laser light source heating and protection device described above.

[0044] The beneficial effects of the present invention are as follows: a laser light source heating and protection device, method, and lamp of the present invention are applied to a laser light source module, comprising a temperature monitoring circuit, a color wheel motor speed detection circuit, a control unit, a heater, and a constant current drive circuit. The present invention adds a laser light source heating and protection device to preheat the auxiliary light source for low-temperature startup, while monitoring whether the laser is within the temperature control range of the specification as a first protection mechanism and whether the color wheel motor speed reaches a specified speed as a second protection mechanism. When the startup temperature is reached, the heating device stops working, and the laser light source lamp is no longer limited by the situation where the laser color wheel motor cannot start at a low temperature, resulting in the lamp being unusable. The laser light source lamp can also be used in low-temperature environments and regions. In addition, the color wheel speed monitoring provides a second line of defense, and the protection module is prohibited from being activated when the speed is insufficient. The above makes the laser lamp system work in a double closed loop of temperature and speed, ensuring the safe operation of the laser light source module and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following introduction is made to the drawings required for use in the embodiments of the present invention. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 A structural block diagram of a laser light source heating and protection device provided in one embodiment of the present invention;

[0047] Figure 2 A circuit schematic diagram of a color wheel motor speed detection circuit provided by an embodiment of the present invention;

[0048] Figure 3 A laser light source module model provided in one embodiment of the present invention;

[0049] Figure 4 A circuit schematic diagram of a heating drive circuit provided in one embodiment of the present invention;

[0050] Figure 5 A structural block diagram of a laser light source heating and protection device provided in another embodiment of the present invention;

[0051] Figure 6 A circuit schematic diagram of a level comparison logic output circuit provided by an embodiment of the present invention;

[0052] Figure 7 An input-output characteristic diagram of a level comparison logic output circuit provided by an embodiment of the present invention;

[0053] Figure 8 A flowchart of the steps of a laser light source heating and protection method provided by one embodiment of the present invention;

[0054] Figure 9 A circuit schematic diagram of an NTC detection circuit provided by an embodiment of the present invention;

[0055] Figure 10 A flowchart of a control unit according to an embodiment of the present invention;

[0056] Figure 11 A flowchart of step S106 provided in accordance with an embodiment of the present invention;

[0057] Figure 12 This is a program flow chart of a control unit according to another embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0059] It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0060] The terms "at least one", "plurality", "each", "any", etc. used in this application include "at least one", "two" or more, "plurality" or "each", "any" or "any one", "each" or "any one" as used herein.

[0061] Laser light source modules are increasingly being used in stage lighting. Compared to traditional light sources, lasers offer advantages such as high intensity, high brightness, focusability, high precision, high beam quality, good directionality, and monochromaticity. However, they are relatively energy-inefficient, require high power and temperature maintenance, and have a relatively short lifespan. A laser light source module consists of a laser, a reflector, a color wheel, and a motor. During normal operation, the laser beam passes through the reflector and out through the color wheel, which must be driven by a motor at high speed to prevent burns. Due to the added motor structure, the motor exhibits increased damping at low temperatures. In real-world use, if the ambient temperature falls below 0°C, some motors may fail to start or operate at insufficient speed. If the motor fails to start, the module cannot produce light. Forcing the color wheel to produce light at insufficient speed can overheat, causing deformation or even burnout, which can severely impact the performance.

[0062] To this end, an embodiment of the present invention proposes a laser light source heating and protection device, which is applied to a laser light source module and includes a temperature monitoring circuit, a color wheel motor speed detection circuit, a control unit, a heater, and a constant current drive circuit. The present invention adds a laser light source heating and protection device to preheat the auxiliary light source for low-temperature startup. At the same time, it monitors whether the laser is within the temperature control range of the specification as a first protection mechanism and whether the color wheel motor speed reaches a specified speed as a second protection mechanism. When the startup temperature is reached, the heating device stops working. The laser light source lamp is no longer limited by the situation where the laser color wheel motor cannot start at a low temperature, resulting in the lamp being unusable. The laser light source lamp can also be used in low-temperature environments and regions. In addition, the color wheel speed monitoring provides a second line of defense, and the protection module is prohibited from being activated when the speed is insufficient. The above makes the laser lamp system work in a double closed loop of temperature and speed, ensuring the safe operation of the laser light source module and increasing its service life.

[0063] Reference Figure 1 , Figure 1 This is a block diagram of a laser light source heating and protection device provided in one embodiment of the present invention. This embodiment of the present invention provides a laser light source heating and protection device, which is applied to a laser light source module. The laser light source module includes a laser and a color wheel motor, including:

[0064] Temperature monitoring circuit, used to collect the current temperature of the laser;

[0065] The color wheel motor speed detection circuit is used to collect the current speed of the color wheel motor;

[0066] The output terminals of the control unit, the temperature monitoring circuit, and the color wheel motor speed detection circuit are all connected to the input terminal of the control unit, and are used to output a heater control signal according to the current temperature and a module control signal according to the current speed;

[0067] A heater is attached to the surface of the laser light source module, an input end of the heater is connected to the first output end of the control unit, and is used to preheat the laser light source module according to a heater control signal;

[0068] A constant current drive circuit, the input end of the constant current drive circuit is connected to the second output end of the control unit, and the output end of the constant current drive circuit is connected to the input end of the laser light source module, and is used to drive the laser light source module according to the module control signal.

[0069] Specifically, the laser light source module, as a light source installed in the lamp, is a modular device that integrates a laser, related optical components, circuits and controllers. The related optical components mainly include reflectors and color wheel motors, the circuits and controllers are mainly motors and drive circuits, and the module also contains NTC detection elements.

[0070] In some optional embodiments, a temperature monitoring circuit is used to monitor the current temperature of the laser in real time. This circuit includes, but is not limited to, an NTC thermistor, an active temperature sensor, and a temperature detection IC. The detection device is attached to the light source as close to the light source as possible. The laser light source module is integrated within the laser, receives the light source's heat level, and provides feedback of temperature data. The feedback signal is connected to the ADC module port of the control unit or the input of the level comparison logic output circuit.

[0071] The color wheel motor speed detection circuit is used to monitor the current speed of the color wheel motor in real time. It includes but is limited to the circuit composed of optical code disk + photoelectric coupler, magnet + magnetic encoder chip, magnet + Hall, etc., wherein the optical code disk and magnet are installed on the motor shaft. For example, Figure 2 This is a circuit schematic diagram of a color wheel motor speed detection circuit provided by an embodiment of the present invention.

[0072] The control unit is used to output a heater control signal based on the current temperature collected by the temperature monitoring circuit, and output a module control signal based on the current speed collected by the color wheel motor speed detection circuit. The control unit includes but is not limited to: an MCU, a CPU, a DSP, a programmable logic device, etc., which has an ADC analog-to-digital detection and conversion unit, a common I / O port, a serial port such as SPI, and a PWM clock generation unit. The ADC analog-to-digital detection and conversion unit is used to receive feedback signals from the NTC thermistor inside the light source module or use a common I / O to receive the level comparison logic output circuit level to reflect temperature information; the I / O port is also used to generate high and low control signals to provide switching logic for the subsequent heating drive circuit; the SPI serial port or TTL level is used to receive the speed information of the color wheel motor; and the PWM clock generation unit is used to generate a PWM pulse width control constant current drive circuit.

[0073] The heater is used to attach to the designated surface of the laser light source module to provide heat energy for the module. It is not limited to heating tubes, but can also be other PCB resistance heating methods. For example, Figure 3 The figure shows a laser light source module model. The laser and color wheel motor are located on both sides of the model. Since the NTC is located on the laser side, not on the same side as the motor, in order to ensure that the NTC can basically reflect the temperature of the motor, the heater has the following two installation methods:

[0074] 1) Place a heater on each side of the laser and the motor, and heat them synchronously and shut them down at different times;

[0075] 2) The heater is placed between the laser and the motor, marked in the blue-gray area. Through the aluminum material, one heater heats both the laser and the motor.

[0076] The constant current drive circuit is used to provide drive current to the LED module and laser light source module.

[0077] Reference Figure 1 As an optional embodiment, the laser light source heating and protection device further includes:

[0078] A heating drive circuit, wherein the input end of the heating drive circuit is connected to the first output end of the control unit, and the output end of the heating drive circuit is connected to the input end of the heater, is used to drive the heater according to the heater control signal.

[0079] In some optional embodiments, a heating drive circuit is connected to the heater and controls the conduction or interruption of current according to a heater control signal output by the control unit, thereby providing current to the heater. The heating drive circuit includes, but is not limited to, a transistor, a MOS transistor, a relay, and a certain number of resistors and capacitors.

[0080] For example, Figure 4 The figure shows a schematic diagram of a heating drive circuit according to an embodiment of the present invention. JP1 is connected to a heater control signal, Uq, which controls NMOS transistor Q4. The on / off state of NMOS transistor Q4 affects the on / off states of NMOS transistors Q1, Q2, and Q3, determining whether the VCC power supply is connected to the heater. A mechanical temperature control switch is also connected in series with the heater to prevent the heater from being disconnected from VCC in the event of circuit failure and thus cessation of heating. When the heater control signal Uq is at a high level, the NMOS transistor Q4 is turned on, a voltage difference exists among the VGS of the NMOS transistors Q1, Q2, and Q3, the NMOS transistors Q1, Q2, and Q3 are turned on, the heater is connected to VCC through the mechanical temperature control switch, and the heater works; when the heater control signal Uq is at a low level, the NMOS transistor Q4 is turned off, there is no voltage difference among the VGS of the NMOS transistors Q1, Q2, and Q3, the NMOS transistors Q1, Q2, and Q3 are turned off, and the heater does not work.

[0081] Reference Figure 5 , Figure 5 This is a structural block diagram of a laser light source heating and protection device provided in another embodiment of the present invention. As an optional embodiment, the laser light source heating and protection device further includes:

[0082] A level comparison logic output circuit, wherein the input end of the level comparison logic output circuit is connected to the output end of the temperature monitoring circuit, and the output end of the level comparison logic output circuit is connected to the input end of the control unit, and is used to output a level signal according to the current temperature and a preset temperature threshold.

[0083] It should be noted that a level comparison logic output circuit can be used to replace the temperature detection and conversion process of the control unit. Using the level comparison logic output circuit to replace part of the temperature processing process is more reliable and the software control process is simpler. The level comparison logic output circuit is used to automatically identify the upper or lower value of the temperature limit, and convert the linear temperature data into simple high and low levels to facilitate the application of subsequent circuits. Furthermore, this circuit can also be directly connected to the heating drive circuit to provide switching logic for the heating drive circuit. The level comparison logic output circuit includes but is not limited to a circuit composed of a comparator, etc. This circuit can compare the level of the input analog signal with the preset level. When the input level is greater than or less than the preset level, the output level automatically flips, wherein the level used for comparison is obtained by converting the preset temperature threshold.

[0084] For example, Figure 6 The figure shows a circuit schematic diagram of a level comparison logic output circuit provided by an embodiment of the present invention. The circuit can be composed of a four-way differential comparator LM339 or other operational amplifier and a number of resistors. The voltage value of the negative terminal of the operational amplifier is set to the preset voltage threshold U1, and the compared signal voltage Uin (that is, the current voltage value converted from the current temperature) is input from the positive terminal of the operational amplifier. When the current voltage value Uin is greater than or equal to the voltage threshold U1, the output level signal Uo is high (that is, the current temperature is less than or equal to the temperature threshold); when the current voltage value Uin is less than the voltage threshold U1, the output level signal Uo is low (that is, the current temperature is greater than the temperature threshold). As shown in FIG. Figure 7 The figure shows the input and output characteristics of the level comparison logic output circuit. Temperature information is thus processed using pure hardware circuitry, directly generating a 1 / 0 logic level signal, which is more reliable and effective than software detection.

[0085] Reference Figure 1 or Figure 5 As an optional embodiment, the laser light source heating and protection device further includes:

[0086] The abnormal information display unit has an input end connected to the third output end of the control unit and is used to display the current temperature, current speed and abnormal warning information output by the control unit.

[0087] In some optional embodiments, the abnormal information display unit is used to display the monitored current temperature and current speed, and display abnormal warning information of temperature and speed. The abnormal information display unit includes but is not limited to a digital screen, an LCD screen, and an LED screen.

[0088] The above is a structural description of a laser light source heating and protection device proposed in an embodiment of the present invention. The working principle of the laser light source heating and protection device is described below with reference to examples.

[0089] Example 1: Figure 1 As shown, the NTC inside the laser light source module is connected to the temperature monitoring circuit for filtering and then outputting Uin, which is then connected to the control unit for monitoring. The speed detection device installed in the module motor is connected to the color wheel motor speed detection circuit. The speed is converted into serial, TTL, or other signals and sent to the control unit for decoding. The control unit determines whether to control the laser light source module heating based on the current temperature, outputs the corresponding heater control signal, and displays temperature information and temperature anomaly information in real time. The control unit also determines whether to disconnect the module drive current based on the current speed, outputs the corresponding module control signal, and displays speed information and speed anomaly information in real time. The heater control signal is connected to the heating drive circuit for control, which is connected to the heater to cut off or connect the power supply to the heater. The heater can be attached to the surface of the laser light source module to heat the laser light source module. The module control signal is connected to the constant current drive circuit, which is connected to the laser light source module to cut off or connect the power supply to the laser light source module, thus forming a closed loop.

[0090] Example 2: Figure 5 As shown, a level comparison logic output circuit replaces the control unit's temperature detection and conversion process. The laser light source module's internal NTC is connected to the temperature monitoring circuit for filtering, generating Uin. Uin undergoes signal processing through the level comparison logic output circuit and is then connected to the control unit's standard I / O port. The speed detection device installed in the module's motor is connected to the color wheel motor's speed detection circuit. The speed is converted to a serial port, TTL, or other signal and sent to the control unit for decoding. The control unit determines whether to control the laser light source module's heating based on the level signal Uo output by the level comparison logic, outputs the corresponding heater control signal, and displays temperature information and temperature anomaly information in real time. The control unit also determines whether to disconnect the module's drive current based on the current speed, outputs the corresponding module control signal, and displays speed information and speed anomaly information in real time. The heater control signal is connected to the heater drive circuit for control. The heater drive circuit connects to the heater, turning it off or on. The heater, when attached to the surface of the laser light source module, heats the module. The module control signal is connected to the constant current drive circuit, which connects to the laser light source module to turn it off or on, thus forming a closed loop.

[0091] The above describes the structure and working principle of the laser light source heating and protection device of the embodiment of the present invention. It can be recognized that the embodiment of the present invention includes a temperature monitoring circuit, a color wheel motor speed detection circuit, a control unit, a heater and a constant current drive circuit. By adding a laser light source heating and protection device, the auxiliary light source is pre-heated for low-temperature startup. At the same time, it monitors whether the laser is within the temperature control range of the specification as a first protection mechanism, and whether the color wheel motor speed reaches the specified speed as a second protection mechanism. When the startup temperature is reached, the heating device stops working. The laser light source lamp is no longer limited by the situation that the laser color wheel motor cannot start at a low temperature, resulting in the lamp being unusable. The laser light source lamp can also be used in low-temperature environments and regions. In addition, the color wheel speed monitoring provides a second line of defense, and the protection module is prohibited from being enabled when the speed is insufficient. The above makes the laser lamp system work to form a double closed loop of temperature and speed, ensuring the safe operation of the laser light source module and improving its service life.

[0092] Reference Figure 8 , Figure 8 This is a flowchart of a laser light source heating and protection method provided by an embodiment of the present invention. The embodiment of the present invention provides a laser light source heating and protection method, which is applied to a laser light source module. The laser light source module includes a laser and a color wheel motor, and includes the following steps S101 to S105:

[0093] S101, collecting the current temperature of the laser through the temperature monitoring circuit;

[0094] S102, collecting the current speed of the color wheel motor through the color wheel motor speed detection circuit;

[0095] S103, outputting a heater control signal according to the current temperature and a module control signal according to the current speed through the control unit;

[0096] S104, preheating the laser light source module through the heater according to the heater control signal;

[0097] S105 , driving the laser light source module according to the module control signal through the constant current driving circuit.

[0098] The contents of the above-mentioned laser light source heating and protection device embodiments are applicable to the embodiments of the present laser light source heating and protection method. The functions specifically implemented by the embodiments of the present laser light source heating and protection method are the same as those of the above-mentioned laser light source heating and protection device embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned laser light source heating and protection device embodiments.

[0099] As a further optional embodiment, the heater control signal includes a heating start signal and a heating shutoff signal, and the module control signal includes a module shutoff signal. The step of outputting the heater control signal according to the current temperature and the module control signal according to the current speed by the control unit can be further divided into the following steps A1051 to A1056:

[0100] A1051, determine the speed threshold, temperature threshold, and timing time;

[0101] A1052, determining a voltage threshold value according to the temperature threshold value, and converting the current temperature into a current voltage value;

[0102] A1053, through the control unit, determines whether the current voltage value is greater than the voltage threshold;

[0103] A1054: When the current voltage value is greater than the voltage threshold, a heating start signal is output and timing begins;

[0104] A1055: During the timing time, if the current voltage value is less than or equal to the voltage threshold, and the current speed is greater than the speed threshold, a heating shutdown signal is output; if the current voltage value is greater than the voltage threshold, a heating start signal is output;

[0105] A1056: After the timing time, if the current voltage value is less than or equal to the voltage threshold, and the current speed is less than or equal to the speed threshold, the heating shutdown signal and the module shutdown signal are output; if the current voltage value is greater than the voltage threshold, the module shutdown signal is output.

[0106] In some optional embodiments, the heater's heating power should be selected to meet product requirements and actual usage. Generally, pre-performance preparations take at least several hours, so a preheating time of several tens of minutes to reach the minimum operating temperature of the laser light source module is sufficient. For example, a 20-minute preheating time is selected.

[0107] Next, determine the voltage threshold U1. Assuming the module specifies that the color wheel motor stops heating when it reaches 0°C, to avoid detection errors and frequent heating starts and stops caused by a fixed threshold, increase this threshold to 2°C, setting the temperature threshold to 2°C. It should be noted that the temperature threshold can also be set according to the actual requirements of the module. For example, the temperature thresholds are set to 1°C, 5°C, and 8°C.

[0108] Refer to the module's internal thermistor "NTC Temperature - Resistance" to find the thermistor resistance value corresponding to 2°C. Suppose the value found is: 135.895k ohm. Based on the found resistance value, combined with the following Figure 9 The NTC detection circuit and conversion formula shown below convert the voltage value of the voltage threshold U1:

[0109]

[0110] The voltage threshold U1 corresponding to the temperature threshold is obtained to be 2.412V.

[0111] like Figure 10 The following is a flowchart of the control unit provided by one embodiment of the present invention. When the lamp is first powered on, the control unit monitors the current temperature value on the temperature monitoring circuit in real time. Based on the above conversion formula and the thermistor "NTC Temperature-Resistance" table, the current temperature value is converted to the current voltage value for display. If the current voltage value Uin is greater than the voltage threshold U1, meaning the current temperature is below 2°C, the control unit begins or continues to control the heater heating, and simultaneously detects the color wheel motor speed and displays and times it:

[0112] 1) Within the timing time (i.e., 20 minutes), when the current voltage value Uin is detected to be less than or equal to the voltage threshold U1, that is, the current temperature is higher than or equal to 2°C, and the motor speed is detected to be above the minimum speed, the control unit outputs a heating shutdown signal, the heater stops heating, and the control unit outputs PWM according to the DMX512 signal to normally control the constant current drive circuit to light the module; when the current voltage value Uin is detected to be greater than the voltage threshold U1, that is, the current temperature is again lower than 2°C, the heating is started again, and the cycle is repeated to keep the laser temperature between 0°C and 2°C in the ready working state;

[0113] 2) When the timing reaches 20 minutes and the current voltage value Uin is monitored to be less than or equal to the voltage threshold U1, that is, the current temperature is higher than or equal to 2°C, but the motor speed is detected to have not reached the minimum speed, the control unit outputs a heating shutdown signal and a module shutdown signal, the heater stops heating, the constant current drive circuit stops supplying power, and the control unit outputs an "abnormal speed" display. At this time, the module is not allowed to light up;

[0114] 3) When the timing reaches 20 minutes and the current voltage value Uin is always greater than the voltage threshold U1, that is, the current temperature is always lower than 2°C, the control unit outputs a module shutdown signal and displays "heating abnormality". At this time, the module is not allowed to light up.

[0115] As an optional embodiment, the laser light source heating and protection method further includes the following step S106:

[0116] S106 , outputting a level signal according to the current temperature and a preset temperature threshold through a level comparison logic output circuit.

[0117] Reference Figure 11 , Figure 11The flowchart of step S106 provided in one embodiment of the present invention is further divided into the following steps S1061 to S1065 as an optional implementation manner:

[0118] S1061. Determine a temperature threshold, and determine a voltage threshold based on the temperature threshold;

[0119] S1062, converting the current temperature into a current voltage value;

[0120] S1063, judging whether the current voltage value is greater than the voltage threshold through the level comparison logic output circuit;

[0121] S1064: When the current voltage value is greater than the voltage threshold, output a first level signal;

[0122] S1065: When the current voltage value is less than or equal to the voltage threshold, output a second level signal.

[0123] Specifically, the voltage threshold U1 is determined by referring to the aforementioned conversion formula, and then the resistance values of resistors R2 and R3 are set so that the condition 3.3*R3 / (R2+R3)=U1 is satisfied. In this way, the voltage at the negative terminal of the level comparison logic output circuit is set to the voltage threshold U1. When the current voltage value Uin is greater than the voltage threshold U1, a first level signal Uo1 (i.e., a high level, the current temperature is lower than 2°C) is output; when the current voltage value Uin is less than or equal to the voltage threshold U1, a second level signal Uo1 (i.e., a low level, the current temperature is higher than or equal to 2°C) is output.

[0124] As a further optional embodiment, the heater control signal includes a heating start signal and a heating shutoff signal, and the module control signal includes a module shutoff signal. The step of outputting the heater control signal according to the current temperature and the module control signal according to the current speed by the control unit can be further divided into the following steps B1051 to B1055:

[0125] B1051, determine the speed threshold and timing time;

[0126] B1052. Determine, by the control unit, whether the level signal is a first level signal or a second level signal;

[0127] B1053: When the level signal is the first level signal, a heating start signal is output and timing is started;

[0128] B1054: During the timing time, if the level signal is the second level signal and the current speed is greater than the speed threshold, a heating shutoff signal is output; if the level signal is the first level signal, a heating start signal is output;

[0129] B1055. After the timing time, if the level signal is the second level signal and the current speed is less than or equal to the speed threshold, output the heating shutdown signal and the module shutdown signal; if the level signal is the first level signal, output the module shutdown signal.

[0130] like Figure 12 The figure shows a program flow chart of a control unit provided by another embodiment of the present invention. When the lamp is first powered on, the control unit monitors the level signal Uo fed back by the level comparison and conversion circuit in real time. If the signal is the first level Uo1, meaning the current temperature is below 2°C, the control unit starts or continues controlling the heater to heat the lamp, and simultaneously detects the color wheel motor speed and displays and times the speed:

[0131] 1) Within the timing time (i.e., 20 minutes), when the level signal Uo is monitored to be the second level signal Uo2, that is, the current temperature is higher than or equal to 2°C, and the motor speed is detected to be above the minimum speed, the control unit outputs a heating shutdown signal, the heater stops heating, and the control unit outputs PWM according to the DMX512 signal to normally control the constant current drive circuit to light the module; when the level signal Uo is monitored to be the first level signal Uo1, that is, the current temperature is again lower than 2°C, the heating is started again, and the cycle is repeated to keep the minimum temperature of the laser between 0°C and 2°C in the ready working state;

[0132] 2) When the timing reaches 20 minutes and the level signal Uo is detected as the second level signal Uo2, that is, the current temperature is higher than or equal to 2°C, but the motor speed is detected to have not reached the minimum speed, the control unit outputs a heating shutdown signal and a module shutdown signal, the heater stops heating, the constant current drive circuit stops supplying power, and the control unit outputs an "abnormal speed" display. At this time, the module is not allowed to light up;

[0133] 3) When the timing reaches 20 minutes and the monitored level signal Uo is always the first level signal Uo1, that is, the temperature is always lower than 2°C, the control unit outputs a module shutdown signal and a "heating abnormality" display, and the module is not allowed to light up at this time.

[0134] It should be appreciated that embodiments of the present invention can be implemented or practiced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The above methods can be implemented in a computer program using standard programming techniques—including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner—according to the methods and figures described in the specific embodiments. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with the computer system. However, if desired, the program can be implemented in assembly or machine language. In any case, the language can be a compiled or interpreted language. In addition, the program can be run on a programmed application-specific integrated circuit for this purpose.

[0135] Furthermore, the operations of the processes described herein may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by the context. The processes described herein (or variations and / or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) that is executed collectively on one or more processors, by hardware, or a combination thereof. The computer programs described above include a plurality of instructions that may be executed by one or more processors.

[0136] Furthermore, the above methods can be implemented in any type of computing platform that is operably connected to a suitable computer, including but not limited to a personal computer, a minicomputer, a mainframe, a workstation, a network or distributed computing environment, a separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Various aspects of the present invention can be implemented as machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and / or write storage medium, RAM, ROM, etc., so that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the processes described herein. In addition, the machine-readable code, or portions thereof, can be transmitted over a wired or wireless network. When such media includes instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor, the invention described herein includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques described herein, the present invention also includes the computer itself.

[0137] The computer program can be applied to input data to perform the functions described herein, thereby converting the input data to generate output data that is stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the converted data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on the display.

[0138] In the above description of this specification, reference to the terms "one embodiment / example," "another embodiment / example," or "certain embodiments / examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0139] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

[0140] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A laser light source heating and protection device, applied to a laser light source module, wherein the laser light source module includes a laser and a color wheel motor, characterized in that: include: A temperature monitoring circuit, used to collect the current temperature of the laser; A color wheel motor speed detection circuit, used for collecting the current speed of the color wheel motor; A control unit, wherein the output terminals of the temperature monitoring circuit and the color wheel motor speed detection circuit are both connected to the input terminal of the control unit, and are configured to output a heater control signal according to the current temperature and a module control signal according to the current speed; a heater attached to the surface of the laser light source module, wherein the input end of the heater is connected to the first output end of the control unit and is used to preheat the laser light source module according to the heater control signal; A constant current drive circuit, wherein the input end of the constant current drive circuit is connected to the second output end of the control unit, and the output end of the constant current drive circuit is connected to the input end of the laser light source module, and is used to drive the laser light source module according to the module control signal.

2. A laser light source heating and protection device according to claim 1, characterized in that: The laser light source heating and protection device also includes: A heating drive circuit, wherein the input end of the heating drive circuit is connected to the first output end of the control unit, and the output end of the heating drive circuit is connected to the input end of the heater, and is used to drive the heater according to the heater control signal.

3. The laser light source heating and protection device according to claim 1, characterized in that: The laser light source heating and protection device also includes: A level comparison logic output circuit, wherein the input end of the level comparison logic output circuit is connected to the output end of the temperature monitoring circuit, and the output end of the level comparison logic output circuit is connected to the input end of the control unit, and is used to output a level signal according to the current temperature and a preset temperature threshold.

4. The laser light source heating and protection device according to claim 1, characterized in that: The laser light source heating and protection device also includes: An abnormal information display unit, wherein the input end of the abnormal information display unit is connected to the third output end of the control unit, and is used to display the current temperature, the current speed and the abnormal warning information output by the control unit.

5. A laser light source heating and protection method, applied to a laser light source module, wherein the laser light source module includes a laser and a color wheel motor, characterized in that: The following steps are involved: collecting the current temperature of the laser through a temperature monitoring circuit; The current speed of the color wheel motor is collected by a color wheel motor speed detection circuit; Outputting a heater control signal according to the current temperature and a module control signal according to the current speed via a control unit; preheating the laser light source module by a heater according to the heater control signal; The laser light source module is driven according to the module control signal through a constant current driving circuit.

6. The laser light source heating and protection method according to claim 5, characterized in that: The heater control signal includes a heating start signal and a heating shutoff signal, and the module control signal includes a module shutoff signal. The control unit outputs the heater control signal according to the current temperature and outputs the module control signal according to the current speed, specifically including: Determine the speed threshold, temperature threshold and timing time; Determine a voltage threshold value according to the temperature threshold value, and convert the current temperature into a current voltage value; Determining, by the control unit, whether the current voltage value is greater than the voltage threshold; When the current voltage value is greater than the voltage threshold, the heating start signal is output and timing is started; Within the timing time, if the current voltage value is less than or equal to the voltage threshold and the current speed is greater than the speed threshold, the heating shutdown signal is output; if the current voltage value is greater than the voltage threshold, the heating start signal is output; After the timing time, if the current voltage value is less than or equal to the voltage threshold, and the current speed is less than or equal to the speed threshold, the heating shutdown signal and the shutdown module signal are output; if the current voltage value is greater than the voltage threshold, the shutdown module signal is output.

7. The laser light source heating and protection method according to claim 5, characterized in that: The laser light source heating and protection method further includes: A level signal is output according to the current temperature and a preset temperature threshold value through a level comparison logic output circuit.

8. The laser light source heating and protection method according to claim 7, characterized in that: The level signal includes a first level signal and a second level signal, and the level comparison logic output circuit outputs the level signal according to the current temperature and a preset temperature threshold, specifically including: determining the temperature threshold, and determining the voltage threshold according to the temperature threshold; Converting the current temperature into a current voltage value; Determining whether the current voltage value is greater than the voltage threshold by the level comparison logic output circuit; When the current voltage value is greater than the voltage threshold, outputting the first level signal; When the current voltage value is less than or equal to the voltage threshold, the second level signal is output.

9. The laser light source heating and protection method according to claim 8, characterized in that: The heater control signal includes a heating start signal and a heating shutoff signal, and the module control signal includes a module shutoff signal. The control unit outputs the heater control signal according to the current temperature and outputs the module control signal according to the current speed, specifically including: Determine the speed threshold and timing time; determining, by the control unit, whether the level signal is the first level signal or the second level signal; When the level signal is the first level signal, outputting the heating start signal and starting timing; Within the timing time, if the level signal is the second level signal and the current speed is greater than the speed threshold, the heating shutdown signal is output; if the level signal is the first level signal, the heating start signal is output; After the timing time, if the level signal is the second level signal and the current speed is less than or equal to the speed threshold, the heating shutdown signal and the shutdown module signal are output; if the level signal is the first level signal, the shutdown module signal is output.

10. A lamp, characterized in that: It comprises a laser light source module, and the laser light source module is driven by a laser light source heating and protection device according to any one of claims 1 to 4.

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