LED instantaneous light flux test method and apparatus in PWM activation technology
A test method and luminous flux technology, applied in the field of measurement, can solve the problems of inconvenient research work, inability to meet the needs of LED instantaneous luminous flux measurement, lack of test methods and test tools, etc., to achieve the effect of dynamic measurement
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[0151] Examples:
[0152] Use Hangzhou Yuanfang Optoelectronics Information Co., Ltd. PMS-50 (enhanced) ultraviolet-visible-near infrared spectrum analysis system + 0.3m integrating sphere, in accordance with the industry standard SJ2355.6-1983 "integrating sphere measurement luminous flux calibration method" for testing, and The specific process is as follows:
[0153] During the preparation phase, press figure 1 , figure 2 The connection relationship between the method and the device is set, and a high-power white LED chip is selected in the experiment, and a constant current is passed through it. The current is increased from 20mA to 400mA, and the relationship curve between the photocurrent and the luminous flux of the optical / electric sensor is obtained, such as Figure 8 Shown.
[0154] It can be seen from the figure that within the linear range of the optical / electric sensor, the photocurrent output of the optical / electric sensor is proportional to the luminous flux, whic...
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