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{"cards":[{"_id":"267173cec3ffb547c800002e","treeId":"267173dfc3ffb547c800002c","seq":23037882,"position":1,"parentId":null,"content":"Light efficiency, this index is very important, is that different light sources at the same time, the same power consumption, how much light. That is to say, the same bright light may not consume the same amount of power, and a high-efficiency light source will definitely save more energy than a low-efficiency light source. Dimming technology, using forward current to change the brightness of the LED, is very easy to achieve. The first thing that comes to mind is to change its driving current, because the brightness of an LED is almost directly proportional to its driving current. The simplest way to adjust the current of LED is to change the current detection resistance in series with the LED load. Almost all DC-DC constant current chips have a current detection interface, which is to compare the detected voltage with the reference voltage inside the chip to control the constant current.\n\nCommon-Cathode CC <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3201agg.html\" style=\"color: #333;\">3201AGG</a> 7-Segment digit <a href=\"http://www.xlitx.com/datasheet/3201AGG.pdf\" style=\"color: #333;\">3201AGG</a> LED Common-Anode CA <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3201bgg.html\" style=\"color: #333;\">3201BGG</a> Display <a href=\"http://www.xlitx.com/datasheet/3201BGG.pdf\" style=\"color: #333;\">3201BGG</a> 0.30 inch\nCommon-Cathode CC <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3021agg.html\" style=\"color: #333;\">3021AGG</a> 7-Segment digit <a href=\"http://www.xlitx.com/datasheet/3021AGG.pdf\" style=\"color: #333;\">3021AGG</a> LED Common-Anode CA <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3021bgg.html\" style=\"color: #333;\">3021BGG</a> Display <a href=\"http://www.xlitx.com/datasheet/3021BGG.pdf\" style=\"color: #333;\">3021BGG</a> 0.30 inch\n\n<hr style=\"border:1px solid;\">\n\n<a href=\"https://gingkoapp.com/the-light-source-with-ra-100-value.html\" style=\"color: #333;\">The light source with Ra 100 value</a>\n<a href=\"https://gingkoapp.com/the-standby-led-lighting-of-emergency.html\" style=\"color: #333;\">The standby LED lighting of emergency</a>\n<a href=\"https://gingkoapp.com/led-light-source-index-and-average-life.html\" style=\"color: #333;\">LED light source index and average life</a>\n<a href=\"https://gingkoapp.com/led-incandescent-lamp-color-response.html\" style=\"color: #333;\">LED incandescent lamp color response</a>\n<a href=\"https://gingkoapp.com/color-performance-of-led-light-source.html\" style=\"color: #333;\">Color performance of LED light source</a>\n<a href=\"https://gingkoapp.com/color-temperature-led-source-irradiation.html\" style=\"color: #333;\">Color temperature LED source irradiation</a>\n<a href=\"https://gingkoapp.com/change-the-brightness-of-the-led.html\" style=\"color: #333;\">Change the brightness of the LED</a>\n<a href=\"https://gingkoapp.com/led-chips-provide-control-voltage-interface.html\" style=\"color: #333;\">LED chips provide control voltage interface</a>\n<a href=\"https://gingkoapp.com/in-the-rgb-led-system.html\" style=\"color: #333;\">In the RGB LED system</a>\n<a href=\"https://gingkoapp.com/led-supply-voltage-and-load-voltage.html\" style=\"color: #333;\">LED supply voltage and load voltage</a>"}],"tree":{"_id":"267173dfc3ffb547c800002c","name":"Change the brightness of the LED","publicUrl":"change-the-brightness-of-the-led"}}