Feedback type automatic power control system

Abstract

The invention relates to a feedback automatic power control system, which is suitable for controlling an electronic element, wherein the electronic element comprises two electrodes; the system comprises a multiplication unit, a control unit and an adjusting unit, wherein the multiplication unit outputs a measurement voltage value corresponding to the power of the electronic element by multiplying a working voltage value corresponding to the voltage difference of the two electrodes and a feedback voltage value corresponding to working current of the electronic element; the control unit outputs a control voltage corresponding to difference value change of the measured voltage value and a set voltage value; and the adjusting unit is electrically connected between the electronic element and the control unit and comprises a transistor connected in series with the electronic element, and the working state of the transistor is changed along with the control voltage of the control unit. The system can acquire the consumed power of the electronic element accurately, automatically adjust electricity supply for the electronic element by the control unit and the adjusting unit according to the consumed power change, and effectively realize the function of maintaining stability of the luminous power.

Description

technical field [0001] The present invention relates to a power control system, in particular to a system that can accurately obtain the power consumption of electronic components, and then automatically adjust the power supply to electronic components through a control unit and an adjustment unit according to changes in power consumption, which can effectively maintain stable luminous power Functional feedback type automatic power control system. Background technique [0002] see figure 1 Shown is a graph illustrating the relationship between the luminous power and the operating current of a light-emitting diode at different element temperatures. When semiconductor elements such as light-emitting diodes and laser diodes are in operation, the luminous power will decrease as the temperature of the elements rises. Therefore, when light-emitting diodes are used without power control, the luminous power is likely to be unstable. [0003] see figure 2 As shown, it is a schema...

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Problems solved by technology

[0004] However, due to the poor directivity of the output light of the light emitting diode 15, the distance between the light detector 14 and the light emitting diode 15, the position, the light pollution of the environment, and the sensitivity of the light detector 14 will all have an impact on the detection signal. , so it is easy to have errors in the control of the luminous power. In addition, the detection signals output by the light detector 14 to the light emitting diode 15 with different wavelengths are also different. The light emitting diode 15 and the light detector 14 When matching different models, the control effect of the luminous power will be affected, so the above reasons will make it difficult to maintain the luminous power of the light emitting diode 15 stably with the current technology of the photodetector 14, resulting in poor results.

[0005] It can be seen that the above-mentioned existing automatic power control system obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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