CN113873714A - Light source driver and sample analyzer - Google Patents
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Abstract
The invention discloses a light source driver and a sample analyzer, wherein the light source driver comprises: the power supply is connected with the light source and used for generating a power supply voltage for supplying power to the light source; the control part is used for sending a first control signal under the condition that the light source is required to be in a normal working state, and sending a second control signal under the condition that the light source is required to be in a standby state; and an execution part connected with the light source, the power supply and the control part, for controlling the power supply to output the first voltage based on the received first control signal, and controlling the power supply to output the second voltage based on the received second control signal. The invention is beneficial to ensuring the service life and the performance of the light source, is more suitable for being applied to a sample analysis scene, and can ensure the accuracy and the reliability of sample analysis data.
Description
Technical Field
The invention relates to the technical field of light source driving, in particular to a light source driver and a sample analyzer.
Background
In the field of medical equipment, it is a common application scenario to take blood, body fluid, tissue samples, etc. out of a human body and then perform detection and analysis. When analyzing a sample, a light source is usually required to irradiate the measurement sample, and the resulting optical characteristics are used to obtain the detection and analysis results of the measurement sample. Therefore, the working condition of the light source is directly related to the accuracy and reliability of the analysis data of the measured sample.
The driving method of the light source in the prior art is mainly to directly switch between the power-on working state and the power-off state of the light source. Specifically, under the condition that the light source is required to work, the power supply required by normal work is provided for the light source, and under the condition that the light source is not required to work, the power supply for normal work of the light source is cut off. Such a light source driving method has the following problems:
1. the light source directly enters the power-off state from the power-on working state or directly enters the power-on working state from the power-off working state, and the light source reciprocates between two opposite extreme states, so that the service life and the performance of the light source are not good.
2. The light source is directly switched into a power-on working state from a power-off closing state, and the cold light source is difficult to quickly enter a stable working state, so that the in-vitro detection timeliness and speed are influenced, and the accuracy and reliability of the analysis data of the determined sample are influenced.
How to provide a light source driving mode which is beneficial to ensuring the service life and the performance of a light source, is more suitable for being applied to a sample analysis scene, and can ensure the accuracy and reliability of sample analysis data does not exist in the prior art at present.
Disclosure of Invention
The invention provides a light source driver which is beneficial to ensuring the service life and the performance of a light source, is more suitable for a sample analysis scene, and can ensure that sample analysis data is accurate and reliable, and also provides a sample analyzer with the light source driver.
The invention adopts a technical means that: there is provided a light source driver comprising:
the power supply is connected with the light source and used for generating a power supply voltage for supplying power to the light source; when the power supply voltage is a first voltage, the light source is in a normal working state, and when the power supply voltage is a second voltage, the light source is in a standby state;
the control part is used for sending a first control signal under the condition that the light source is required to be in a normal working state, and sending a second control signal under the condition that the light source is required to be in a standby state; and
and the execution part is connected with the light source, the power supply and the control part and is used for controlling the power supply to output the first voltage based on the received first control signal and controlling the power supply to output the second voltage based on the received second control signal.
The invention adopts another technical means that: there is provided a sample analyzer comprising:
a light source; and
the light source driver; the light source driver is connected with the light source.
Due to the adoption of the technical scheme, the light source driver and the sample analyzer provided by the invention can utilize the control part and the execution part to control the power supply to provide the power supply voltage required by the standby state for the light source, so that the light source can be in the standby state except for the power-on working state and the power-off closing state, and further the light source does not need to be supplied with power all the time, can be subjected to standby dormancy processing, are more energy-saving, and are also beneficial to slowing down the aging of the light source and prolonging the service life of the light source. The control signals are sent by the control parts, so that the power supply voltage output by the power supply is controlled to be different, the light source is convenient to change between a normal working state and a standby state, and when the light source driver is applied to a sample analysis scene, the hot light source in the standby state is favorably switched to the normal working state, so that the time efficiency and the speed of sample analysis are improved, and the accuracy and the reliability of sample analysis data determination are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a block diagram of a light source driver in one embodiment;
FIG. 2 is a block diagram of a light source driver in one embodiment;
FIG. 3 is a block diagram of a light source driver in one embodiment;
FIG. 4 is a block diagram of a light source driver in one embodiment;
FIG. 5 is a circuit schematic of a light source driver in one embodiment;
FIG. 6 is a circuit schematic of a light source driver in one embodiment;
FIG. 7 is a schematic diagram of the structure of a sample analyzer in one embodiment.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The present invention provides a light source driver, as shown in fig. 1, which may include, in one embodiment: a power supply, a control section and an execution section. The power supply is connected with the light source and used for generating a power supply voltage for supplying power to the light source, and the light source can be an LED light source, a laser light source or other light sources, such as some light sources which can be applied to a sample analyzer. When the power supply voltage is a first voltage, the light source is in a normal working state, when the power supply voltage is a second voltage, the light source is in a standby state, the second voltage is lower than the first voltage, and the first voltage and the second voltage can be generated by the power supply at different time intervals according to the control of the control part, namely, the same power supply can generate at least two power supply voltages. The normal working state refers to that the light source is in a light-emitting state, and the current flowing through the light source reaches the range of the forward working current of the light source. The standby state refers to that the light source is in a non-luminous micro-conduction state, and the current flowing through the light source is lower than the forward working current of the light source. The control part is used for sending a first control signal under the condition that the light source is required to be in a normal working state, and sending a second control signal under the condition that the light source is required to be in a standby state. The execution part is connected with the light source, the power supply and the control part. The execution part is used for controlling the power supply to output the first voltage based on the received first control signal, and when the power supply voltage is the first voltage, the light source enters a normal working state. The execution part is used for controlling the power supply to output the second voltage based on the received second control signal, and when the power supply voltage is the second voltage, the light source enters a standby state.
The embodiment can utilize the control part and the execution part to control the power supply to provide the power supply voltage required by the standby state for the light source, so that the light source can be in the standby state except two states of the power-on working state and the power-off state, and further the light source does not need to be powered all the time, can be subjected to standby dormancy processing, is more energy-saving, is also favorable for slowing down the aging of the light source, and prolongs the service life of the light source. The control signals are sent by the control parts, so that the power supply voltage output by the power supply is controlled to be different, the light source is convenient to change between a normal working state and a standby state, and when the light source driver is applied to a sample analysis scene, the hot light source in the standby state is favorably switched to the normal working state, so that the time efficiency and the speed of sample analysis are improved, and the accuracy and the reliability of sample analysis data determination are ensured.
In one embodiment, the power supply may stop supplying power to the light source in the event that the light source is required to be in a deactivated state. The working stop state is that the light source is in a non-luminous state, the current does not flow through the light source, and when the power supply stops supplying power to the light source, the light source enters the working stop state. The light source can be switched among the normal operation state, the standby state, and the stop operation state according to the difference of the power supply voltage, for example, when the power supply voltage is changed from the first voltage to the second voltage, the state of the light source is correspondingly switched from the normal operation state to the standby state, and when the power supply voltage is changed from the second voltage to the first voltage, the state of the light source is correspondingly switched from the standby state to the normal operation state. When the power supply voltage is changed from the first voltage or the second voltage to a non-power supply voltage, correspondingly, the state of the light source is switched from the normal working state or the standby state to the stop working state. The control of the state of the light source is realized by controlling the power supply of the light source, and the state of the light source can be controlled by adopting the same power supply.
In one embodiment, as shown in fig. 2, the light source driver may further include a load adjustment part. The load adjustment part is connected with the power supply and the execution part. The execution part controls the load adjustment part to provide a first load based on the received first control signal, and controls the load adjustment part to provide a second load based on the received second control signal, and the load adjustment part can adjust the load provided by the execution part according to the first control signal or the second control signal. Specifically, the load adjustment portion and the light source may be connected in parallel between a power supply positive terminal and a power supply negative terminal of the power supply, that is, with respect to the output of the power supply, the load adjustment portion may perform a shunting function on the light source, and the load adjustment portion adjusts the magnitude of the shunting function on the light source by adjusting the magnitude of a load provided by the load adjustment portion, where when the load provided by the load adjustment portion is larger, the shunting function on the light source is smaller, and then the current flowing through the light source is larger, and when the load provided by the load adjustment portion is smaller, the shunting function on the light source is larger, and then the current flowing through the light source is smaller. When the load adjustment unit includes a resistor, a large load indicates a large resistance, and a small load indicates a small resistance, that is, a large load corresponds to a large resistance, and a small load corresponds to a small resistance. When the second load is lower than the first load, the current flowing through the light source when the load adjustment part provides the second load is smaller than the current flowing through the light source when the load adjustment part provides the first load. The load adjustment unit may be implemented by adjusting an adjustable resistor, and the load provided by the load adjustment unit may be adjusted by adjusting an adjustable resistor, or may be implemented by using a plurality of resistors connected in series, and the load provided by the load adjustment unit may be adjusted by bypassing one or more of the plurality of resistors. Through the configuration of the load adjusting part, the power supply voltage provided by the power supply for the light source, namely the power supply voltage applied to the light source by the power supply, can be flexibly adjusted.
In one embodiment, as shown in fig. 4, the performing part may include a first switching part. The first switch part is controlled by the control part. The first switch unit is turned off when the control unit sends the first control signal, and the first switch unit is turned on when the control unit sends the second control signal. The load adjusting part is connected with the first switch part, and when the first switch part is turned off, the load adjusting part provides a first load. When the first switch part is switched on, the load adjusting part provides a second load; the second load is lower than the first load. Specifically, the first switch portion may be connected in parallel with a partial load of the load adjustment portion, and further, when the first switch portion is turned on, the branch where the first switch portion is located may bypass the partial load connected in parallel therewith, and when the first switch portion is turned off, the partial load connected in parallel with the first switch portion is not bypassed. The first switch section is adapted to facilitate automatic and convenient adjustment of the load adjustment section with a simple structure.
Fig. 5 and 6 show examples of schematic circuit diagrams of the light source driving circuit of the present invention, and in one embodiment, as shown in fig. 5 and 6, the power supply may have a positive power supply terminal and a negative power supply terminal outputting the power supply voltage. The load adjustment portion may include a first load resistor R2 and a second load resistor R4 connected in series between the power supply positive terminal VCC2 and the power supply negative terminal GND. The value of the first load is equal to the sum of the resistance values of the first load resistor R2 and the second load resistor R4; the value of the second load is equal to the resistance value of the first load resistor R2. The first load resistor R2 also serves as a feedback resistor of the power supply and acts between the adjusting end and the output end of the three-terminal regulator U1. The first switch part is provided with a first control end, a first switch end and a second switch end; the first control terminal is configured to receive the first control signal or the second control signal, the second load resistor R4 is connected between the first switch terminal and the switch terminal, the reference VCC2 in fig. 5 and 6 represents the positive terminal of the power supply, the reference GND represents the negative terminal of the power supply, the network reference PWR _ EN represents the connection with the control unit, and the control unit may employ a single chip, a microcontroller, a processor, a CPU, or other electronic devices with control functions. Specifically, the control portion may be connected to the first switching portion via a connection terminal J1. The above reference numerals are merely examples, and do not limit specific voltage values.
In one embodiment, as shown in fig. 5 and 6, the first switching part may include: the circuit comprises a first triode Q1, a first driving resistor R3, a protection resistor R5 and a protection capacitor C3. One end of the first driving resistor R3 is connected to the base of the first transistor Q1, and the other end is used as the first control end. The protection resistor R5 and the protection capacitor C3 form a parallel branch, and two ends of the parallel branch are respectively connected with the base electrode and the emitter electrode of the first triode Q1. The collector and the emitter of the first triode Q1 are respectively used as the first switch terminal and the second switch terminal, and the second load resistor R4 is connected between the collector and the emitter. Illustratively, the first transistor Q1 shown in fig. 5 and 6 employs SS8050, and the first transistor Q1 may employ a transistor, a MOS transistor, other controllable electronic switches, and the like.
In one embodiment, as shown in fig. 5 and 6, the power supply may include a DC-DC conversion part. The DC-DC conversion unit is configured to perform DC-DC conversion on an input power source to generate the supply voltage, the input power source is a direct-current voltage provided by an external power source or an internal energy storage module such as a battery, reference numerals VCC1 and GND in fig. 5 or 6 denote a positive electrode and a negative electrode of the input power source, the direct-current voltage 12V is merely an example, and the input power source may be a direct-current voltage of another voltage value.
In one embodiment, as shown in fig. 5 and 6, the DC-DC conversion part may include a three-terminal regulator U1. The input end VIN of the three-terminal regulator U1 is connected with the input power supply VCC1, the adjusting end ADJ of the three-terminal regulator U1 is connected with the output ends VOUT1, VOUT2, VOUT3 and VOUT4 of the three-terminal regulator U1 through the first load resistor R2, and the output ends VOUT1, VOUT2, VOUT3 and VOUT4 of the three-terminal regulator U1 are used as the power supply positive end VCC 2. In this embodiment, an effect of generating two kinds of power supply voltages by using one power supply chip can be achieved, a circuit structure is simplified, and development cost is saved, and exemplarily, the circuit schematic diagram shown in fig. 5 and 6 can achieve that the first voltage is 9V and the second voltage is 1.2V, and of course, specific values of the first voltage and the second voltage can be configured and adjusted according to power supply characteristics of different light sources. The three-terminal regulator U1 shown in fig. 5 and 6 employs the LM317, but other three-terminal regulators or switching power supplies may be employed instead.
In one embodiment, as shown in fig. 3, the light source driver may further include a current limiter. The current limiting part is used for limiting the current flowing through the light source, and particularly, the current limiting part and the light source can be mutually connected between a positive power supply terminal and a negative power supply terminal of the power supply in series; the execution unit controls the current limiter to be connected to the power supply based on the received first control signal, and plays a role of limiting a current flowing through the light source when the current limiter is connected to the power supply, and controls the current limiter not to be connected to the power supply based on the received second control signal, and the execution unit cannot limit the current flowing through the light source when the current limiter is not connected to the power supply. The current limiting part of the light source is controlled by the embodiment, so that the current flowing through the light source can be adjusted, and the state of the light source is changed.
In one embodiment, as shown in fig. 4, the performing part may include a second switching part. The second switching part is controlled by the control part. The second switch part is turned off when the control part sends the first control signal, and is turned on when the control part sends the second control signal. The current limiting part is connected with the second switch part, when the second switch part is switched off, the current limiting part is connected with the power supply, and when the second switch part is switched on, the current limiting part is not connected with the power supply. Specifically, the second switch portion and the current limiting portion may be connected in parallel, and further, when the second switch portion is turned on, the branch where the second switch portion is located may bypass the current limiting portion connected in parallel therewith, and when the second switch portion is turned off, the current limiting portion connected in parallel with the second switch portion is not bypassed. The second switch part is adopted to facilitate automatic and convenient adjustment of the current limiting part with a simple structure.
In one embodiment, as shown in fig. 5 and 6, the power supply may have a power supply positive terminal VCC2 and a power supply negative terminal GND that output the supply voltage. The second switch part is provided with a second control end, a third switch end and a fourth switch end; the second control end is used for receiving the first control signal or the second control signal, and the current limiting part is connected between the third switch end and the fourth switch end in parallel. The current limiting part may include a current limiting resistor R12 disposed between the power supply positive terminal VCC2 and the power supply negative terminal GND; the current limiting resistor R12 is connected in series with the light source D1. In fig. 5 and 6, reference VCC2 denotes the positive terminal of the power supply, reference GND denotes the negative terminal of the power supply, and network reference PWR _ EN denotes the connection with the control unit, which may be a single chip microcomputer, a microcontroller, a processor, a CPU, or other electronic devices with control functions. Specifically, the control portion may be connected to the second switching portion via a connection terminal J1. The above reference numerals are merely examples, and do not limit specific voltage values. Illustratively, the light source shown in fig. 5 and 6 is an LED light source D1, specifically, the LED light source D1 may be an HSE450, but other LED light sources may be adopted.
In one embodiment, as shown in fig. 5 and 6, the second switching part may include: a second transistor Q4 and a second driving resistor R20; one end of the second driving resistor R20 is connected to the base of the second triode Q4, and the other end of the second driving resistor R20 is used as the second control end; the current limiting part is connected between the collector and the emitter of the second triode Q4 as the third switch end and the fourth switch end respectively. As a further example, the current limiter in fig. 5 includes only a current limiting resistor R12. The current limiting part in fig. 6 includes a current limiting resistor R12 and a transistor Q3, the transistor Q3 may be connected to the control part via a connection terminal J1 by a network reference character Ctrl, so as to control a conduction state of the transistor Q3, and the configuration of the transistor Q3 may further achieve that the light source is driven by a constant current after exiting from the standby state, the control part controls a conduction state of the transistor Q3, so as to influence a conduction internal resistance of the transistor Q3, so as to adjust a current flowing through the light source, and the conduction internal resistance of the transistor Q3 may be adjusted according to a change of the current flowing through the light source, so as to achieve a constant current driving purpose when the light source is in a normal operating state. For example, the second transistor Q4 shown in fig. 5 and 6 uses SS8050, and the second transistor Q4 may use a transistor, a MOS transistor, other controllable electronic switches, and the like.
As a specific embodiment, for example, as shown in fig. 5 and 6, in the case that the light source needs to be in the standby state, the control unit sends a second control signal (which may be a high level) to control the first transistor Q1 and the second transistor Q4 to be turned on. At this time, the adjustment terminal ADJ of the three-terminal regulator U1 is grounded, the second load resistor R4 is bypassed by the turned-on first transistor Q1, and the dc voltage 9V between the positive terminal VCC2 of the power supply and the negative terminal GND of the power supply is changed to about 1.2V. Since the second transistor Q4 is turned on, the cathode of the LED light source D1 is grounded, and the power supply voltage 1.2V is applied across the LED light source D1 to enter a non-light emitting standby state. Under the condition that the light source needs to be in a normal working state, the control part sends out a first control signal (which can be low level) to control the first triode Q1 and the second triode Q4 to be turned off, at the moment, the second load resistor R4 is normally connected back to the power supply, the power supply voltage between the power supply positive end VCC2 and the power supply negative end GND is recovered to 9V, and the LED light source D1 is recovered to be in a normal working state.
The present invention also provides a sample analyzer, as shown in fig. 7, which may include: a light source and a light source driver as described in any of the above embodiments. The light source driver is connected with the light source. Further, in use, the light source may be used to illuminate the assay sample, and the light source may be an LED or laser light source. The sample analyzer may be a sample analyzer. The sample analyzer may be a blood analyzer for performing functional analysis and testing on blood. Still further, the sample analyzer may further include a photoelectric receiving portion and a photoelectric conversion portion to receive and convert an optical signal after irradiating the measurement sample.
In one embodiment, the light source is in normal operation when the sample analyzer uses the light source for sample detection. The sample analyzer stops using the light source and stops for a long time not to be higher than the condition of presetting for a long time, the light source is in a standby state, works as after sample analyzer accomplishes sample analysis work, if the time difference of next sample analysis working distance this time sample analysis work does not exceed the presetting for a long time, then can control the light source gets into the standby state, so when next sample analysis work starts, the light source directly gets into normal operating condition by the standby state, after the time difference of next sample analysis working distance this time sample analysis work exceeds the presetting for a long time, control the light source gets into the stop operating condition. The preset time length can be 0-24h, or can be adjusted according to application requirements. Before the sample analyzer uses the light source to perform sample detection, the light source is in a standby state, before the sample analyzer prepares to perform sample analysis work, the light source is firstly controlled to enter the standby state, and when the sample analysis work is started, the light source enters a normal working state from the standby state. The sample analyzer adopting the light source driver can slow down the aging of the light source, has low power consumption and saves more energy, and can quickly enter a stable test state when the sample analysis is started, thereby improving the sample analysis efficiency and being beneficial to ensuring the accuracy and the reliability of the analysis data of the measured sample.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (15)
1. A light source driver, characterized in that the light source driver comprises:
the power supply is connected with the light source and used for generating a power supply voltage for supplying power to the light source; when the power supply voltage is a first voltage, the light source is in a normal working state, and when the power supply voltage is a second voltage, the light source is in a standby state;
the control part is used for sending a first control signal under the condition that the light source is required to be in a normal working state, and sending a second control signal under the condition that the light source is required to be in a standby state; and
and the execution part is connected with the control part and used for controlling the power supply to output the first voltage based on the received first control signal and controlling the power supply to output the second voltage based on the received second control signal.
2. The light source driver according to claim 1, wherein the power supply stops supplying power to the light source in case the light source is required to be in a stop operation state.
3. The light source driver according to claim 1, further comprising: a load adjustment unit connected to the power supply and the execution unit; the execution part controls the load adjustment part to provide a first load based on the received first control signal, and controls the load adjustment part to provide a second load based on the received second control signal.
4. The light source driver according to claim 3,
the execution unit includes: a first switching part controlled by the control part; the first switch part is turned off under the condition that the control part sends the first control signal, and the first switch part is turned on under the condition that the control part sends the second control signal;
the load adjusting part is connected with the first switch part, and provides a first load when the first switch part is turned off and a second load when the first switch part is turned on; the second load is lower than the first load.
5. The light source driver according to claim 4,
the power supply is provided with a power supply positive end and a power supply negative end which output the power supply voltage;
the load adjusting part comprises a first load resistor and a second load resistor which are mutually connected in series between the positive end of the power supply and the negative end of the power supply; the value of the first load is equal to the sum of the resistance values of the first load resistance and the second load resistance; the value of the second load is equal to the resistance value of the first load resistor;
the first switch part is provided with a first control end, a first switch end and a second switch end; the first control end is used for receiving the first control signal or the second control signal, and the second load resistor is connected between the first switch end and the switch end in parallel.
6. The light source driver according to claim 5, wherein the first switching section includes: the protection circuit comprises a first triode, a first driving resistor, a protection resistor and a protection capacitor; one end of the first driving resistor is connected to the base electrode of the first triode, and the other end of the first driving resistor is used as the first control end; the protection resistor and the protection capacitor form a parallel branch, and two ends of the parallel branch are respectively connected with a base electrode and an emitting electrode of the first triode; and the second load resistor is connected between the collector and the emitter of the first triode.
7. The light source driver of claim 5, wherein the power supply comprises: and a DC-DC conversion unit for DC-DC converting an input power supply to generate the supply voltage.
8. The light source driver according to claim 7, wherein the DC-DC conversion section includes: a three-terminal voltage stabilizer; the input end of the three-terminal regulator is connected with the input power supply, the adjusting end of the three-terminal regulator is connected with the output end of the three-terminal regulator through the first load resistor, and the output end of the three-terminal regulator serves as the positive end of the power supply.
9. The light source driver according to claim 1, further comprising: a current limiting part for limiting a current flowing through the light source; the execution part controls the current limiting part to be connected to the power supply based on the received first control signal, and controls the current limiting part not to be connected to the power supply based on the received second control signal.
10. The light source driver according to claim 9,
the execution unit includes: a second switch part controlled by the control part; the second switch part is turned off under the condition that the control part sends the first control signal, and the second switch part is turned on under the condition that the control part sends the second control signal;
the current limiting part is connected with the second switch part, when the second switch part is switched off, the current limiting part is connected with the power supply, and when the second switch part is switched on, the current limiting part is not connected with the power supply.
11. The light source driver of claim 10,
the power supply is provided with a power supply positive end and a power supply negative end which output the power supply voltage;
the second switch part is provided with a second control end, a third switch end and a fourth switch end; the second control end is used for receiving the first control signal or the second control signal, and the current limiting part is connected between the third switch end and the fourth switch end in parallel;
the current limiting part comprises a current limiting resistor arranged between the positive power supply terminal and the negative power supply terminal; the current limiting resistor is connected with the light source in series.
12. The light source driver according to claim 11, wherein the second switching section comprises: the second triode and the second driving resistor; one end of the second driving resistor is connected to the base electrode of the second triode, and the other end of the second driving resistor is used as the second control end; and the current limiting part is connected between the collector and the emitter of the second triode.
13. A sample analyzer, comprising:
a light source; and
and a light source driver as claimed in any one of claims 1 to 12; the light source driver is connected with the light source.
14. The sample analyzer of claim 13,
under the condition that the sample analyzer uses the light source to detect a sample, the light source is in a normal working state;
under the condition that the sample analyzer stops using the light source and the stop time length is not longer than the preset time length, the light source is in a standby state;
the light source is in a standby state before the sample analyzer uses the light source for sample detection.
15. The sample analyzer of claim 13,
the light source is an LED or laser light source.
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| CN113873714B (en) | 2024-03-29 |
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